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公开(公告)号：US10215201B2
公开(公告)日：2019-02-26
申请号：US14765038
申请日：2014-05-20
Applicant: Hangzhou XZB Tech Co., Ltd.
Inventor： Na Xu
Abstract: A column type hydraulic tappet includes a housing; a plunger correspondingly installed in the housing; and a high pressure chamber for a hydraulic medium formed between the bottom face of the plunger and the bottom of the housing and is sealed by a check valve opening toward the high pressure chamber. The housing includes an external circumferential groove on the outer diameter for passing the hydraulic medium and an inner circumferential groove on the inner diameter for passing the hydraulic medium. One or more housing oil holes are disposed between the outer circumferential groove and the inner circumferential groove. The plunger includes a sealed hemisphere head portion, a shaft portion and a body portion. An indent neck portion between the head and shaft portions of the plunger has a wall thickness 105%-120% of the wall thickness of the other portions of the plunger.
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公开(公告)号：US10408093B2
公开(公告)日：2019-09-10
申请号：US15874905
申请日：2018-01-19
Applicant: Hangzhou XZB Tech Co.,Ltd
Inventor： Na Xu , Haijun Ren , Hua Dong
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.
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公开(公告)号：US09885330B1
公开(公告)日：2018-02-06
申请号：US15361017
申请日：2016-11-24
Applicant: Hangzhou XZB Tech Co.,Ltd
Inventor： Na Xu
CPC classification number: F02M59/102 , F04B1/0426 , F04B1/0439 , F04B1/053 , F04B9/042
Abstract: A high-pressure fuel pump actuator used in an engine, which is used in a fuel injection system of an engine, is mounted on between a driving cam and a fuel pump plunger. The pump actuator includes a guide sleeve, a U-shaped holder, and a pin shaft roller set. The U-shaped holder is formed by stamping the steel plate integrally. The guide sleeve uses a special windowing manner. Both ends of the pin shaft do not need riveting. The structure of the present invention has less number of parts and integrated functions, which can notably reduce the entire weight, the inertial force, the friction, and the abrasion. The operation is steady. The efficiency of the engine is improved.
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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
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.
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公开(公告)号：US20170342951A1
公开(公告)日：2017-11-30
申请号：US15191543
申请日：2016-06-24
Applicant: Hangzhou XZB Tech Co.,Ltd
Inventor： Na XU , Haijun REN
CPC classification number: F02M59/102 , F01L1/14 , F01L1/245 , F01L1/46 , F01L2105/00 , F01L2105/02 , F01L2109/00 , F04B1/0426
Abstract: A high-pressure oil pump roller tappet, used for automobile fuel injection system, mounted between the driving cam and the tappet. The roller tappet includes a shell, a holder, a roller, and a pin. Planes A are arranged on both sides of the seam on lateral sides of the shell. Holes I are arranged at symmetrical positions on two planes A. Holes II are arranged on symmetrical positions on vertical plates. The roller is located in the middle of the pin. Welding has no requirement on the thickness of the plate. The weight can be controlled effectively, reducing inertia force, friction, and wear, improving engine efficiency. The shell and holder are designed as being separate, ensuring that the shell subjects to lateral force as little as possible when the holder subjects to a force, such that the shell is less likely to vibrate. Thus, the shell avoids the abrasion.
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Patent Agency Ranking
公开(公告)号：US10287930B2
公开(公告)日：2019-05-14
申请号：US15795253
申请日：2017-10-27
Applicant: Hangzhou XZB Tech Co.,Ltd
Inventor： Na Xu , Haijun Ren
IPC: F01L1/18
Abstract: This invention provides a novel lightweight rocker arm frame and a forming process of a curved crown part thereof, including two sidewalls and two bottom plates. The two sidewalls are connected through the bottom plates respectively located at two ends. A ball socket protruded upwards and an oil hole are arranged at a bottom plate at one end, and a bottom surface of a bottom plate at the other end is a bearing surface. A pin shaft hole is formed in the middle of each sidewall without the bottom plates. According to the rocker arm frame disclosed by the invention, the strength of the structure can be ensured while light weight is realized. The production efficiency of the rocker arm frame is effectively improved, and the structure of the valve rod supporting position is improved.
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公开(公告)号：US20190093522A1
公开(公告)日：2019-03-28
申请号：US15795253
申请日：2017-10-27
Applicant: Hangzhou XZB Tech Co.,Ltd
Inventor： Na XU , Haijun REN
IPC: F01L1/18
Abstract: This invention provides a novel lightweight rocker arm frame and a forming process of a curved crown part thereof, including two sidewalls and two bottom plates. The two sidewalls are connected through the bottom plates respectively located at two ends. A ball socket protruded upwards and an, oil hole are arranged at a bottom plate at one end, and a bottom surface of a bottom plate at the other end is a bearing surface. A pin shaft hole is formed in the middle of each sidewall without the bottom plates. According to the rocker arm frame disclosed by the invention, the strength of the structure can be ensured while light weight is realized. The production efficiency of the rocker arm frame is effectively improved, and the structure of the valve rod supporting position is improved.
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公开(公告)号：US20170342867A1
公开(公告)日：2017-11-30
申请号：US15542391
申请日：2016-01-05
Applicant: HANGZHOU XZB TECH CO., LTD
Inventor： Na XU
IPC: F01L1/245
CPC classification number: F01L1/245 , F01L1/24 , F01L1/2405 , F01L2103/00
Abstract: A columnar-type hydraulic tappet, provided with a housing, a plunger moving axially with respect to the housing being mounted in an inner cavity of the housing, a high pressure cavity used for a hydraulic medium extending between a lower end surface of the plunger and a lower side of the housing, a first ring groove being arranged below a head portion of the plunger, a second ring groove being arranged at a central portion of the plunger, a plunger central wall being between the first ring groove and the second ring groove, the second ring groove being a concave wide ring groove, wherein at least one plunger oil inlet hole being arranged on the plunger concave wide ring groove or the plunger central wall, a bottom portion edge of the plunger oil inlet hole containing flanging facing towards an inner cavity of the plunger.
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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
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。
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公开(公告)号：US10208634B2
公开(公告)日：2019-02-19
申请号：US15542391
申请日：2016-01-05
Applicant: HANGZHOU XZB TECH CO., LTD
Inventor： Na Xu
Abstract: A columnar-type hydraulic tappet, provided with a housing, a plunger moving axially with respect to the housing being mounted in an inner cavity of the housing, a high pressure cavity used for a hydraulic medium extending between a lower end surface of the plunger and a lower side of the housing, a first ring groove being arranged below a head portion of the plunger, a second ring groove being arranged at a central portion of the plunger, a plunger central wall being between the first ring groove and the second ring groove, the second ring groove being a concave wide ring groove, wherein at least one plunger oil inlet hole being arranged on the plunger concave wide ring groove or the plunger central wall, a bottom portion edge of the plunger oil inlet hole containing flanging facing towards an inner cavity of the plunger.
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