公开(公告)号：US20190085731A1

公开(公告)日：2019-03-21

申请号：US15874905

申请日：2018-01-19

Applicant: Hangzhou XZB Tech Co.,Ltd

Inventor： NA XU ,  HAIJUN REN ,  HUA DONG

IPC: F01L1/14 ,  F16H53/06

CPC classification number: F01L1/14 ,  F01L2105/00 ,  F02M59/102 ,  F04B1/0426 ,  F16H53/06

Abstract: A welded high-pressure fuel pump roller tappet, which is used for the fuel injection system in an engine, includes a guide sleeve, a U-shaped holder and a pin-shaft-roller set. Symmetrical positions on the upper portion of left and right sidewalls of the guide sleeve are provided with inflexed flanges. Two sides of the flange are folded inwardly to form a limiting slot. The U-shaped holder includes a bottom plate and side plates located on left and right sides of the bottom plate. Symmetrical positions on two side plates are provided with axle holes. The pin-shaft-roller set is set up between two side plates of the U-shaped holder. Symmetrical positions on the upper portion of the flange are provided with opening slots. After assembly, the U-shaped holder is located between two flanges. Two side plates are located inside the limiting slots in the flanges.

公开(公告)号：US20160298502A1

公开(公告)日：2016-10-13

申请号：US15025068

申请日：2015-02-26

Applicant: HANGZHOU XZB TECH CO., LTD.

Inventor： NA XU

IPC: F01L1/245 ,  F01L1/14

CPC classification number: F01L1/245 ,  F01L1/14 ,  F01L1/16 ,  F01L1/185 ,  F01L1/2405

Abstract: A columnar hydraulic tappet comprises a housing. A plunger is correspondingly mounted in the housing. A high-pressure chamber extends between a lower end surface of the plunger and a lower side of the housing. An outer ring groove is disposed on the outer diameter of the housing, an inner ring groove is disposed in the radial inner side of the housing, and one or more housing oil feed holes are disposed between the inner ring groove and the outer ring groove. The lower end inside the housing is provided with a grinding wheel groove, an upper end wall of the inner ring groove of the housing is a first internal cylindrical wall, and a housing inner-wall between the lower end of the inner ring groove of the housing and the grinding wheel groove is a second internal cylindrical wall. A lower part of a head of the plunger is provided with a first ring groove, and a middle part of the plunger is provided with a second ring groove; a plunger middle wall is disposed between the first ring groove and the second ring groove, the second ring groove is a concave and wide ring groove, the plunger middle wall is provided with at least one oil feed holes communicated with the second ring groove, a cylindrical wall at the lower end of the concave and wide ring groove of the plunger is a plunger lower wall, and a leak-down sealing region is disposed between the second internal cylindrical wall of the housing and the plunger lower wall; and a width δ of the grinding wheel groove is not less than a working stroke height h of the plunger.

Abstract translation: 柱形液压挺杆包括壳体。 柱塞相应地安装在壳体中。 高压室在柱塞的下端面和壳体的下侧之间延伸。 在壳体的外径上设置有外圈槽，在壳体的径向内侧设置有内圈槽，在内圈槽和外圈槽之间设置一个以上的壳体供油孔。 壳体内的下端设置有砂轮槽，壳体的内环槽的上端壁是第一内圆柱形壁，以及在内环槽的下端之间的壳体内壁 外壳和砂轮槽是第二内圆柱形壁。 柱塞的头部的下部设置有第一环形槽，并且柱塞的中间部分设置有第二环形槽; 在第一环槽和第二环槽之间设置有柱塞中间壁，第二环槽是凹形宽环槽，柱塞中间壁设置有与第二环槽连通的至少一个供油孔， 柱塞的凹槽和宽环槽的下端的圆柱形壁是柱塞下壁，并且泄漏密封区域设置在壳体的第二内圆柱壁和柱塞下壁之间; 并且砂轮槽的宽度δ不小于柱塞的工作行程高度h。