WO2013078813A1 - 臂架防后倾力矩限制器 - Google Patents

臂架防后倾力矩限制器 Download PDF

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Publication number
WO2013078813A1
WO2013078813A1 PCT/CN2012/073822 CN2012073822W WO2013078813A1 WO 2013078813 A1 WO2013078813 A1 WO 2013078813A1 CN 2012073822 W CN2012073822 W CN 2012073822W WO 2013078813 A1 WO2013078813 A1 WO 2013078813A1
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Prior art keywords
cylinder
boom
oil
chassis
valve
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PCT/CN2012/073822
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English (en)
French (fr)
Inventor
朱晓勇
赵长春
雷冀
Original Assignee
湖南三一智能控制设备有限公司
北京市三一重机有限公司
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Application filed by 湖南三一智能控制设备有限公司, 北京市三一重机有限公司 filed Critical 湖南三一智能控制设备有限公司
Publication of WO2013078813A1 publication Critical patent/WO2013078813A1/zh

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66CCRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/88Safety gear
    • B66C23/92Snubbers or dashpots for preventing backwards swinging of jibs, e.g. in the event of cable or tackle breakage

Definitions

  • the invention relates to the field of continuous wall technology, in particular to a boom anti-backward moment limiter.
  • box type there are two types of underground continuous wall grab arms in the industry: box type and truss type.
  • the change in angle is primarily achieved by the winding and lowering of the wire rope. Since the steel wire rope is mainly the elastic body, the pulling force of the steel wire rope is reduced and the steel wire rope will shrink when the grab touches the ground and the rushing. In this case, the bounce will rebound and the sway will occur. In order to reduce such sway, the grab will be stable and normal. Most manufacturers add spring compression rods to the boom to reduce their sway.
  • the technical problems of the above structure are: Due to the limitation of the spring stiffness and the size, the anti-backward moment limiter made by the system has a large outer shape, and the vibration absorption and anti-backward effects are not good.
  • the invention aims to propose a boom anti-backward moment limiter to improve the effect of the torque limiter vibration absorption and anti-backward.
  • the anti-backward moment limiter of the boom includes: a chassis connecting base, at least one oil cylinder, a cylinder transition contact shaft, a boom connecting base and a hydraulic control unit; wherein the chassis connecting base is fixedly connected with the chassis; The pin and the chassis are connected to the base and the cylinder transition contact shaft is hinged; the arm connection base is fixedly connected with the arm frame; and, when the arm frame is raised to a predetermined angle, the transition contact shaft is connected to the guide groove and the arm on the base through the arm frame
  • the hydraulic control unit comprises a fuel tank, a relief valve, a regulating valve and a one-way valve; wherein the one-way valve and the regulating valve form a first oil passage through the connecting pipeline; the oil tank and the overflow valve are formed by the connecting pipeline The second oil passage; the oil outlet of the regulating valve in the first oil passage is connected to the oil inlet of the overflow valve in the second oil passage, and is connected to the oil inlet of the oil cylinder through the connecting pipeline at the joint.
  • the cylinder is a single rod differential cylinder.
  • the cylinder is an internal drain cylinder, and the cylinder A plurality of orifices are formed in the end face of the piston rod.
  • the piston has a four orifices on the dry end face of the cylinder.
  • the cylinder is an external differential cylinder or a cylinder.
  • the cylinder is a single-stage cylinder or a multi-stage cylinder.
  • the chassis connecting base and the chassis are fixedly connected by screwing or welding.
  • the boom connecting base and the boom are fixedly connected by screwing or welding.
  • the anti-backward moment limiter of the boom of the invention replaces the spring in the prior art by using the oil cylinder, and the shape of the torque limiter caused by the spring stiffness and the size limitation is large, and the vibration absorption and the anti-backward effect are not good. Defects; and, by adjusting the opening pressure of the relief valve in the hydraulic control unit, it can meet the anti-backward moment required for different boom angles.
  • FIG. 1 is a schematic view of the whole vehicle assembly of the embodiment of the boom anti-backward moment limiter of the present invention
  • FIG. 2 is a schematic structural view of the first embodiment of the boom anti-backward moment limiter of the present invention
  • the structure of the anti-backward cylinder piston rod In the first embodiment of the anti-backlash torque limiter, the structure of the anti-backward cylinder piston rod;
  • FIG. 4 is a hydraulic principle diagram of a first embodiment of a boom anti-backward moment limiter according to the present invention
  • FIG. 5 is a schematic structural view of a second embodiment of a boom anti-backward moment limiter according to the present invention
  • Fig. 1 is a schematic view showing the assembly of a whole vehicle according to an embodiment of a boom anti-backward moment limiter of the present invention.
  • the chassis connecting seat 1 is connected to the chassis 8 by bolts, and can also be connected to the chassis by welding.
  • the chassis connecting base 1 is coupled to the cylinder 2 via a pin shaft, and the cylinder transition connecting shaft 3 is connected to the cylinder through a pin shaft.
  • the boom connecting base 4 is bolted to the boom 9 or may be connected to the boom by welding.
  • the cylinder transition contact shaft 3 gradually comes into contact with the boom 9 through the guide groove on the boom connecting base 4 only when the boom 9 is slanted to a certain angle.
  • the boom anti-backward moment limiter of the embodiment includes a chassis connecting base 1 and a cylinder
  • the chassis connecting base 1 is fixedly connected with the chassis 8; the two ends of the oil cylinder 2 are respectively hinged to the chassis connecting base 1 and the cylinder transition contact shaft 3 through the pin shaft; the arm connecting base 4 is fixedly connected with the arm frame 9; At a predetermined angle, the transition contact shaft 3 is in contact with the boom 9 via a guide groove on the boom connecting base 4.
  • the number of oil rainbows is one and is an internal venting rainbow.
  • the piston rod 21 of the oil cylinder 2 has a plurality of appropriately sized orifices on its end face.
  • the preferred embodiment of the present embodiment has four orifices. In fact, the size and number of openings are determined by the structure of the piston and the pressure of the hydraulic fluid supplied.
  • the hydraulic control unit comprises a fuel tank, a relief valve 5, a regulating valve 6 and a check valve 7; wherein the check valve 7 and the regulating valve 6 form a first oil passage through a connecting line; the oil tank and the overflow valve 5 pass through the connecting line Forming a second oil passage; the oil outlet of the regulating valve 6 in the first oil passage is connected to the oil inlet of the relief valve 5 in the second oil passage, and the oil inlet of the cylinder 2 is connected through the connecting pipeline at the joint The mouth 10 is connected. After the hydraulic oil passes through the check valve 7 and then the series adjustment valve 6 is connected in series, it flows into the cylinder 2. The pressure of the hydraulic oil in the cylinder 2 is determined by the set relief valve 5, and when the pressure of the hydraulic oil is higher than the opening pressure of the relief valve 5, the relief valve 5 is opened and the hydraulic oil is returned to the tank.
  • the cylinder in the anti-backward moment limiter can be a single rod differential cylinder or an external pipeline type differential cylinder or plunger cylinder.
  • the differential cylinders can be one, two or more depending on the installation space and the pressure of the hydraulic fluid that can be supplied.
  • the anti-backward moment limiter cylinder can be a single-stage cylinder or a multi-stage cylinder, which is determined according to the cylinder stroke and installation space.
  • the anti-backward moment limiter of the boom adopts the oil cylinder instead of the spring in the prior art, and overcomes the defect that the shape of the torque limiter caused by the spring stiffness and the size limitation is large, and the vibration absorption and the anti-backward effect are not good. And, by adjusting the opening pressure of the relief valve in the hydraulic control unit, it can meet the anti-backward moment required for different boom angles.
  • Second embodiment Second embodiment
  • the boom anti-backward moment limiter of the embodiment comprises a chassis connecting base 1, a cylinder 2, a cylinder transition contact shaft 3, a boom connecting base 4 and a hydraulic control unit.
  • the chassis connecting base 1 is fixedly connected with the chassis 8; the two ends of the oil cylinder 2 are respectively hinged to the chassis connecting base 1 and the cylinder transition contact shaft 3 through the pin shaft; the arm connecting base 4 is fixedly connected with the arm frame 9; At a predetermined angle, the transition contact shaft 3 is in contact with the boom 9 via a guide groove on the boom connecting base 4.
  • the number of cylinders is one, and is an external differential cylinder, including the first An inlet port 12 and a second inlet port 11 are provided.
  • the hydraulic control unit comprises a fuel tank, a relief valve 5, a regulating valve 6 and a check valve 7; wherein the check valve 7 and the regulating valve 6 form a first oil passage through a connecting line; the oil tank and the overflow valve 5 pass through the connecting line Forming a second oil passage; the oil outlet of the regulating valve 6 in the first oil passage is connected to the oil inlet of the relief valve 5 in the second oil passage, and the first connection port and the cylinder 2 are connected at the joint The oil inlet port 12 and the second oil inlet port 11 are connected. After the hydraulic oil passes through the check valve 7, it is connected to the adjustment valve 6 in series and then flows into the cylinder 2. The pressure of the hydraulic oil in the cylinder 2 is determined by the set relief valve 5, and when the pressure of the hydraulic oil is higher than the opening pressure of the relief valve 5, the relief valve 5 is opened and the hydraulic oil is returned to the tank.
  • the anti-backward moment limiter of the boom adjusts the opening pressure of the relief valve in the hydraulic control unit to meet the anti-backward moment required for different boom angles.
  • the cylinder in the anti-backward moment limiter can be a single rod differential cylinder or an external pipeline type differential cylinder or plunger cylinder.
  • the differential cylinders can be one, two or more depending on the installation space and the pressure of the hydraulic fluid that can be supplied.
  • the anti-backward moment limiter cylinder can be a single-stage cylinder or a multi-stage cylinder, which is determined according to the cylinder stroke and installation space.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Jib Cranes (AREA)

Abstract

一种臂架防后倾力矩限制器,包括:底盘连接底座(1)、至少一个油缸(2)、油缸过渡接触轴(3)、臂架连接底座(4)和液压控制单元,底盘连接底座(1)与底盘(8)固定连接,油缸(2)的两端分别通过销轴与底盘连接底座(1)和油缸过渡接触轴(3)铰接,臂架连接底座(4)与臂架(9)固定连接,并且,当臂架(9)起桅到预定角度时,过渡接触轴(3)通过臂架连接底座(4)上的引导槽与臂架(9)接触连接;液压控制单元包括油箱、溢流阀(5)、调整阀(6)和单向阀(7),单向阀(7)和调整阀(6)通过连接管路组成第一油路,油箱和溢流阀(5)通过连接管路组成第二油路,第一油路中调整阀(6)的出油口与第二油路中溢流阀(5)的进油口相连接,并且,在连接处通过连接管路与油缸(2)的进油口相连接。

Description

臂架防后倾力矩限制器 本申请要求于 2011 年 11 月 30 日提交中国专利局、 申请号为 201110390540.1、 发明名称为"臂架防后倾力矩限制器"的中国专利申请的 优先权, 其全部内容通过引用结合在本申请中。
技术领域
本发明涉及连续墙技术领域, 特别涉及一种臂架防后倾力矩限制器。
背景技术
目前, 行业内存在的地下连续墙抓斗臂架主要分为两种: 箱体式与桁 架式。
对于桁架式臂架来说, 其角度的变化主要通过钢丝绳的缠绕与下放来 完成。 由于钢丝绳是弹性体主要承受拉力, 在抓斗触地和沖抓的瞬间, 钢 丝绳拉力下降, 钢丝绳将发生收缩。 在这种情况下臂架会发生回弹现象产 生晃动, 为了减小这样的晃动, 保证抓斗稳定正常的工作。 大部分厂家都 在臂架上增加弹簧压缩杆, 来减小其晃动。
但上述结构存在的技术问题是: 由于受到弹簧刚度与尺寸的限制, 制 作出来的防后倾力矩限制器外形较大, 而吸振与防后倾效果不好。
发明内容
本发明旨在提出一种臂架防后倾力矩限制器, 以提高力矩限制器吸振 与防后倾的效果。
本发明臂架防后倾力矩限制器包括: 底盘连接底座、 至少一个油缸、 油缸过渡接触轴、 臂架连接底座和液压控制单元; 其中, 底盘连接底座与 底盘固定连接; 油缸的两端分别通过销轴与底盘连接底座和油缸过渡接触 轴铰接; 臂架连接底座与臂架固定连接; 并且, 当臂架起桅到预定角度时, 过渡接触轴通过臂架连接底座上的引导槽与臂架接触连接; 液压控制单元 包括油箱、 溢流阀、 调整阀和单向阀; 其中, 单向阀和调整阀通过连接管 路组成第一油路; 油箱和溢流阀通过连接管路组成第二油路; 第一油路中 调整阀的出油口与第二油路中溢流阀的进油口相连接, 并且, 在连接处通 过连接管路与油缸的进油口相连接。
优选地, 上述臂架防后倾力矩限制器中, 油缸为单杆差动式油缸。 优选地, 上述臂架防后倾力矩限制器中, 油缸为内泄式油缸, 油缸的 活塞杆端面开有多个阻尼孔。
优选地, 上述臂架防后倾力矩限制器中, 油缸的活塞^ ^干端面开有四个 阻尼孔。
优选地, 上述臂架防后倾力矩限制器中, 油缸为外接式差动油缸或柱 塞油缸。
优选地,上述臂架防后倾力矩限制器中, 油缸为单级油缸或多级油缸。 优选地, 上述臂架防后倾力矩限制器中, 底盘连接底座与底盘通过螺 纹或焊接的方式固定连接。
优选地, 上述臂架防后倾力矩限制器中, 臂架连接底座与臂架通过螺 纹或焊接的方式固定连接。
本发明臂架防后倾力矩限制器采用油缸替代了现有技术中的弹簧, 克 月良了弹簧刚度与尺寸限制所导致的力矩限制器外形较大, 吸振与防后倾效 果不好的缺陷; 并且,通过对液压控制单元中溢流阀的开启压力进行调节, 满足不同臂架角度时其所需要的防后倾力矩。
附图说明
图 1为本发明臂架防后倾力矩限制器实施例的整车装配示意图; 图 2为本发明臂架防后倾力矩限制器第一实施例的结构示意图; 图 3为本发明臂架防后倾力矩限制器第一实施例中, 防后倾油缸活塞 杆结构示意图;
图 4为本发明臂架防后倾力矩限制器第一实施例中的液压原理图; 图 5为本发明臂架防后倾力矩限制器第二实施例的结构示意图; 图 6为本发明臂架防后倾力矩限制器第二实施例的液压原理图。
具体实施方式
下面将结合本发明实施例中的附图, 对本发明实施例中的技术方案进 行清楚、 完整地描述, 显然, 所描述的实施例仅仅是本发明一部分实施例, 而不是全部的实施例。 基于本发明中的实施例, 本领域普通技术人员在没 有作出创造性劳动前提下所获得的所有其他实施例, 都属于本发明保护的 范围。
参照图 1 , 图 1为本发明臂架防后倾力矩限制器实施例的整车装配示 意图。 从图 1 可以看出, 底盘连接座 1通过螺栓与底盘 8相联, 也可以通过 焊接方式连接于底盘上。 底盘连接座 1通过销轴与油缸 2相联, 油缸过渡 连接轴 3通过销轴与油缸相连。臂架连接底座 4通过螺栓连接于臂架 9上, 也可以通过焊接方式与臂架连接。
并且, 在本发明中, 只有当臂架 9起桅到一定角度时, 油缸过渡接触 轴 3通过臂架连接底座 4上的引导槽逐渐与臂架 9接触。
第一实施例
下面, 参照图 2、 图 3和图 4, 对本发明臂架防后倾力矩限制器的第一 实施例进行详细的说明。
参照图 2。本实施例臂架防后倾力矩限制器包括底盘连接底座 1、油缸
2、 油缸过渡接触轴 3、 臂架连接底座 4和液压控制单元。
底盘连接底座 1与底盘 8固定连接; 油缸 2的两端分别通过销轴与底 盘连接底座 1和油缸过渡接触轴 3铰接; 臂架连接底座 4与臂架 9固定连 接; 当臂架 9起桅到预定角度时, 过渡接触轴 3通过臂架连接底座 4上的 引导槽与臂架 9接触连接。
在该实施例中, 油虹的数量为一个, 而且为内泄式油虹。 油虹 2的活 塞杆的结构参照图 3所示,所述油缸的活塞杆 21端面开有若干个尺寸适当 的阻尼孔, 本实施例优选的方式为开有 4个阻尼孔。 事实上, 开孔的大小 与数量根据活塞的结构与所提供液压油的压力来确定。
液压原理图参照图 4所示。 液压控制单元包括油箱、 溢流阀 5、 调整 阀 6和单向阀 7; 其中, 单向阀 7和调整阀 6通过连接管路组成第一油路; 油箱和溢流阀 5通过连接管路组成第二油路; 第一油路中调整阀 6的出油 口与第二油路中溢流阀 5的进油口相连接, 并且, 在连接处通过连接管路 与油缸 2的进油口 10相连接。液压油经单向阀 7后再串接调整阀 6后流入 到油缸 2。 油缸 2内液压油的压力通过设定的溢流阀 5来确定, 当液压油 的压力高于溢流阀 5的开口压力时, 溢流阀 5打开, 液压油回油箱。
下面, 对本实施例臂架防后倾力矩限制器的工作原理说明如下。
当连续墙抓斗触地的瞬间, 臂架 9突然回弹, 通过臂架连接底座 4将 回弹力传递到油缸 2上, 在回弹力的作用下, 油缸 2发生压缩。 油缸 2内 腔的液压油经由入油口经溢流阀流回油箱。 在这个过程中由于溢流阀 5有 一定的开启压力, 所以阻碍了臂架的回弹。 当臂架回弹到极限位置后, 臂 架将恢复到原来的初使位置, 这时液压缸 2内的液压油压力低于供给液压 油压力, 单向阀 7打开, 液压油经单向阀 7流入液压缸 2内, 液压缸 2的 活塞推出加速使臂架回位, 在臂架回位的过程中, 由于溢流阀 5的存在, 可以保证液压缸 2对臂架的推力不是太大, 保证了臂架承受较小的外部载 荷。 在整个过程中臂架 9不断的回弹, 但是其回弹幅度越来越小, 在液压 缸 2的作用下, 使臂架在最短的时间内达到平衡。 当出现意外的情况臂架 后翻时, 油缸被压缩到极限位置, 此时油缸 2不能再被压缩, 从而起到了 一种机械限位的效果, 防止意外事故的发生。
此外, 需要说明的是:
( 1 )防后倾力矩限制器中的油缸可以采用单杆差动油缸,也可以采用 外接管路式差动油缸或柱塞缸。 差动油缸可是一个、 两个或者更多, 具体 根据安装空间与所能提供液压油的压力来确定。
( 2 )防后倾力矩限制器油缸可以是单级油缸, 也可以是多级油缸, 具 体根据油缸行程与安装空间来确定。
本实施例臂架防后倾力矩限制器采用油缸替代了现有技术中的弹簧, 克服了弹簧刚度与尺寸限制所导致的力矩限制器外形较大, 吸振与防后倾 效果不好的缺陷; 并且, 通过对液压控制单元中溢流阀的开启压力进行调 节, 满足不同臂架角度时其所需要的防后倾力矩。 第二实施例
下面, 参照图 5和图 6, 对本发明臂架防后倾力矩限制器的第二实施 例进行详细的说明。
参照图 5。本实施例臂架防后倾力矩限制器包括底盘连接底座 1、油缸 2、 油缸过渡接触轴 3、 臂架连接底座 4和液压控制单元。
底盘连接底座 1与底盘 8固定连接; 油缸 2的两端分别通过销轴与底 盘连接底座 1和油缸过渡接触轴 3铰接; 臂架连接底座 4与臂架 9固定连 接; 当臂架 9起桅到预定角度时, 过渡接触轴 3通过臂架连接底座 4上的 引导槽与臂架 9接触连接。
在该实施例中, 油缸的数量为一个, 而且为外接式差动油缸, 包括第 一进油口 12和第二进油口 11。
液压原理图参照图 6所示。 液压控制单元包括油箱、 溢流阀 5、 调整 阀 6和单向阀 7; 其中, 单向阀 7和调整阀 6通过连接管路组成第一油路; 油箱和溢流阀 5通过连接管路组成第二油路; 第一油路中调整阀 6的出油 口与第二油路中溢流阀 5的进油口相连接, 并且, 在连接处通过连接管路 与油缸 2的第一进油口 12和第二进油口 11相连接。 液压油经单向阀 7后 再串接调整阀 6后流入到油缸 2。 油缸 2内液压油的压力通过设定的溢流 阀 5来确定, 当液压油的压力高于溢流阀 5的开口压力时,溢流阀 5打开, 液压油回油箱。
本实施例臂架防后倾力矩限制器通过对液压控制单元中溢流阀的开启 压力进行调节, 满足不同臂架角度时其所需要的防后倾力矩。
本实施例臂架防后倾力矩限制器的工作原理与第一实施例类似, 在此 不再赘述。
此外, 需要说明的是:
( 1 )防后倾力矩限制器中的油缸可以采用单杆差动油缸,也可以采用 外接管路式差动油缸或柱塞缸。 差动油缸可是一个、 两个或者更多, 具体 根据安装空间与所能提供液压油的压力来确定。
( 2 )防后倾力矩限制器油缸可以是单级油缸, 也可以是多级油缸, 具 体根据油缸行程与安装空间来确定。
以上所述仅为本发明的较佳实施例而已, 并不用以限制本发明, 凡在 本发明的精神和原则之内, 所作的任何修改、 等同替换、 改进等, 均应包 含在本发明的保护范围之内。

Claims

权 利 要 求
1、 一种臂架防后倾力矩限制器, 其特征在于, 包括:
底盘连接底座(1)、 至少一个油缸(2)、 油缸过渡接触轴(3)、 臂架 连接底座(4)和液压控制单元; 其中,
所述底盘连接底座( 1 )与底盘( 8 ) 固定连接; 所述油缸( 2 )的两端 分别通过销轴与所述底盘连接底座( 1 )和所述油缸过渡接触轴( 3 )铰接; 所述臂架连接底座(4)与臂架(9) 固定连接; 并且, 当臂架(9)起桅到 预定角度时, 所述过渡接触轴 (3)通过所述臂架连接底座(4)上的引导 槽与所述臂架( 9 )接触连接; 并且
所述液压控制单元包括油箱、 溢流阀( 5 )、调整阀( 6 )和单向阀( 7 ); 其中, 所述单向阀 (7)和所述调整阀 (6)通过连接管路组成第一油路; 油箱和溢流阀( 5 )通过连接管路组成第二油路;所述第一油路中调整阀( 6 ) 的出油口与所述第二油路中溢流阀(5)的进油口相连接, 并且, 在连接处 通过连接管路与所述油缸( 2 ) 的进油口相连接。
2、 根据权利要求 1所述的臂架防后倾力矩限制器, 其特征在于, 所述油缸(2) 为单杆差动式油缸。
3、 根据权利要求 2所述的臂架防后倾力矩限制器, 其特征在于, 所述油缸(2) 为内泄式油缸, 所述油缸(2) 的活塞 4干(21 )端面开 有多个阻尼孔。
4、 根据权利要求 3所述的臂架防后倾力矩限制器, 其特征在于, 所述油缸(2) 的活塞杆(21)端面开有四个阻尼孔。
5、 根据权利要求 1所述的臂架防后倾力矩限制器, 其特征在于, 所述油缸 (2) 为外接式差动油缸或柱塞油缸。
6、 根据权利要求 1所述的臂架防后倾力矩限制器, 其特征在于, 所述油缸 (2) 为单级油缸或多级油缸。
7、 根据权利要求 1所述的臂架防后倾力矩限制器, 其特征在于, 所述底盘连接底座( 1 )与底盘( 8 )通过螺纹或焊接的方式固定连接。
8、 根据权利要求 1所述的臂架防后倾力矩限制器, 其特征在于, 所述臂架连接底座( 4 )与臂架( 9 )通过螺纹或焊接的方式固定连接。
PCT/CN2012/073822 2011-11-30 2012-04-11 臂架防后倾力矩限制器 WO2013078813A1 (zh)

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