CN2172760Y - 双速手动立式液压千斤顶 - Google Patents

双速手动立式液压千斤顶 Download PDF

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CN2172760Y
CN2172760Y CN 93220041 CN93220041U CN2172760Y CN 2172760 Y CN2172760 Y CN 2172760Y CN 93220041 CN93220041 CN 93220041 CN 93220041 U CN93220041 U CN 93220041U CN 2172760 Y CN2172760 Y CN 2172760Y
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jack
utility
model
vertical hydraulic
hydraulic jack
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CN 93220041
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张箭
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Abstract

本实用新型公开了一种双速手动立式液压千斤 顶,它是在现有千斤顶的基础上增设了一套活塞副, 该活塞付在千斤顶空载起升时产生作用,使千斤顶的 空载起升速度比重载起升速度快14~20倍,解决了 现有千斤顶只有一种起升速度,使空载起升速度过慢 的缺陷,可大幅度提高工作效率。

Description

本实用新型涉及一种支承、举升重物的双速手动立式液压千斤顶。
现有技术中,手动立式液压千斤顶是由手动泵、油箱、活塞付及底座等组成的,通过手动泵的往复工作,使液压油产生压力推动活塞杆上升实现举升重物的作用,由于只有一套活塞付,所以也只有一种起升速度,即空载与重载的起升速度一样,千斤顶的起升速度是用起升进程度表示的,即手动泵全行程往复工作十次,活塞杆的上升量,下表列出了几种千斤顶的起升速度:
型    号        QY32        QY50        JDD50
起重量        32t        50t        50t
起升速度        6mm        4mm        4.4mm
从表中可以看出,现有千斤顶的起升速度是很慢的,在使用中,千斤顶都有一段空载行程,用以消除它与重物之间距离,而这样慢的起升速度使其工作效率太低,劳动强度大。
本实用新型的目的在于针对现有技术的不足,提供一种结构合理、空载起升速度快、可提高工作效率的双速手动立式液压千斤顶。
本实用新型的目的是这样实现的,如图所示,由手动泵1、油箱2、大小活塞杆、内外缸筒和底座7等组成的千斤顶,其特征在于大活塞杆3是空心的,其内设有内缸筒4,内缸筒与大活塞杆之间通过轴套8固接为一体,使其可同步升降,小活塞杆5是带油道9的空心管,它固定在底座7上,并通过底座上的油道与手动泵相通,小活塞杆与内缸筒之间有一个液压腔6,其工作原理如下,手动泵在往复工作的同时,一方面通过单向阀C吸入液压油,另一方面又通过单向阀a和油道9把高压油压入内缸筒,使内缸筒与大活塞杆快速上升,与此同时,油箱的油通过单向阀b被吸入外缸筒,当大活塞杆顶住重物后,空载行程结束,这时,继续加压,液控单向阀打开,高压油进入外缸筒,使大活塞杆的起升速度由快速调整到正常起升速度。
与现有技术相比,本实用新型具有结构合理,使空载起升速度比重载起升速度快14~20倍、大幅度提高工作效率等优点。
附图1是本实用新型结构示意图
附图2是本实用新型工作原理图
附图给出了本实用新型的一个实施例,本实用新型适合大吨位千斤顶,即32吨以上起重量。

Claims (1)

1、一种双速手动立式液压千斤顶,它由手动泵、油箱、大小活塞杆、内外缸筒和底座等组成,其特征在于大活塞杆是空心的,其内设有内缸筒,内缸筒与大活塞杆通过轴套固接为一体,可以同步升降,小活塞杆是带油道的空心管,它固定在底座上,其上的油道与底座上的油道相通。
CN 93220041 1993-07-30 1993-07-30 双速手动立式液压千斤顶 Expired - Fee Related CN2172760Y (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 93220041 CN2172760Y (zh) 1993-07-30 1993-07-30 双速手动立式液压千斤顶

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 93220041 CN2172760Y (zh) 1993-07-30 1993-07-30 双速手动立式液压千斤顶

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CN2172760Y true CN2172760Y (zh) 1994-07-27

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CN 93220041 Expired - Fee Related CN2172760Y (zh) 1993-07-30 1993-07-30 双速手动立式液压千斤顶

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996022937A1 (fr) * 1995-01-28 1996-08-01 Shinn Hua (China) Machinery Co., Ltd. Unite de commande pour verin hydraulique a commande manuelle
CN110902594A (zh) * 2019-12-13 2020-03-24 常熟通润汽车零部件股份有限公司 一种双油缸卧式千斤顶
US20230009283A1 (en) * 2021-05-25 2023-01-12 Gaither Tool Company, Inc. Double Acting Rapid Lift Auxiliary Valve Assembly for a Hydraulic Jack

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996022937A1 (fr) * 1995-01-28 1996-08-01 Shinn Hua (China) Machinery Co., Ltd. Unite de commande pour verin hydraulique a commande manuelle
CN110902594A (zh) * 2019-12-13 2020-03-24 常熟通润汽车零部件股份有限公司 一种双油缸卧式千斤顶
US20230009283A1 (en) * 2021-05-25 2023-01-12 Gaither Tool Company, Inc. Double Acting Rapid Lift Auxiliary Valve Assembly for a Hydraulic Jack
US11919758B2 (en) * 2021-05-25 2024-03-05 Gaither Tool Company, Inc. Double acting rapid lift auxiliary valve assembly for a hydraulic jack

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