WO2013060232A1 - 工程机械用支腿装置及混凝土泵车 - Google Patents

工程机械用支腿装置及混凝土泵车 Download PDF

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Publication number
WO2013060232A1
WO2013060232A1 PCT/CN2012/082685 CN2012082685W WO2013060232A1 WO 2013060232 A1 WO2013060232 A1 WO 2013060232A1 CN 2012082685 W CN2012082685 W CN 2012082685W WO 2013060232 A1 WO2013060232 A1 WO 2013060232A1
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WIPO (PCT)
Prior art keywords
leg
link
hinged
construction machine
chassis
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Application number
PCT/CN2012/082685
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English (en)
French (fr)
Inventor
余德海
邝昊
杨钢
李乡安
易滔
Original Assignee
中联重科股份有限公司
湖南中联重科专用车有限责任公司
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Application filed by 中联重科股份有限公司, 湖南中联重科专用车有限责任公司 filed Critical 中联重科股份有限公司
Publication of WO2013060232A1 publication Critical patent/WO2013060232A1/zh

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes 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
    • B66C23/62—Constructional features or details
    • B66C23/72—Counterweights or supports for balancing lifting couples
    • B66C23/78—Supports, e.g. outriggers, for mobile cranes
    • B66C23/80—Supports, e.g. outriggers, for mobile cranes hydraulically actuated
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
    • E04G21/04—Devices for both conveying and distributing
    • E04G21/0418—Devices for both conveying and distributing with distribution hose
    • E04G21/0436—Devices for both conveying and distributing with distribution hose on a mobile support, e.g. truck
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
    • E04G21/04—Devices for both conveying and distributing
    • E04G21/0418—Devices for both conveying and distributing with distribution hose
    • E04G21/0445—Devices for both conveying and distributing with distribution hose with booms

Definitions

  • the present invention relates to the field of construction machinery, and in particular to a leg device for a construction machine and a concrete pump truck having the leg. Background technique
  • Construction machinery such as concrete pump trucks and truck cranes often need to be supported by a leg device to avoid overturning of the construction machinery during operation.
  • the leg device usually includes two front legs and two rear legs. Legs, each leg has two states of stowed and unfolded. When the construction machinery needs to move, it is necessary to fold up the legs to facilitate the movement; when the construction machinery needs to work, it is necessary to unfold the legs to achieve support.
  • FIG. 1 shows a leg assembly 40 of a concrete pump truck that includes two oscillating front legs 41 and two oscillating rear legs 43 hinged to a swivel base 30 in the chassis of the pump truck.
  • a single cylinder 50 is driven between each leg and the swing base 30 to achieve the stowage and unfolding of the legs.
  • the stroke of the cylinder is long, and the mechanical design is not reasonable.
  • the cylinder requires a lot of force to push the legs; especially when the pump is large in size and long in stroke, the structure is even more inadequate. Specifically, the following points are included:
  • a long cylinder is required to reach the deployment angle of the design, and the larger the pump size is, the longer the cylinder stroke is required; the long stroke cylinder has high manufacturing and maintenance costs;
  • a single cylinder requires a large cylinder force to push the leg.
  • the technical problem to be solved by the present invention is to provide an improved leg for engineering machinery. And a concrete pump truck having the leg device.
  • the present invention adopts the following technical solutions:
  • a leg device for a construction machine comprising a swinging leg hinged to a chassis of a construction machine, a telescopic drive device, and a link mechanism disposed between the swinging leg and the telescopic drive device, A link mechanism is used to transmit a driving force generated by the telescopic drive to the swinging leg to drive the swinging leg to swing relative to the chassis.
  • the link mechanism includes a first link, one end of which is hinged to the swinging leg and the other end is hinged to the telescopic drive.
  • the link mechanism includes a second link having one end hinged to the chassis and the other end hinged to the first link.
  • the second link forms a planar four-bar linkage with the first link, the swinging leg and the chassis.
  • the other end of the second link is hinged to a middle portion of the first link.
  • the distance between the second link and the first link to the hinge of the first link and the swinging leg is smaller than the distance between the second link and the first link.
  • the rod is hinged to a distance at which the first link is hinged to the telescopic drive.
  • the other end of the first link is bent inward.
  • the telescopic drive device is a hydraulic cylinder.
  • the telescopic drive device and the link mechanism are disposed above or below the swinging leg.
  • the present invention also provides a concrete pump truck comprising a chassis and the leg device for a construction machine according to any of the above, wherein the swinging leg and the telescopic drive are hinged to the chassis.
  • the chassis includes a swivel base, and the swinging leg and the telescopic driving device are hinged to the swivel base.
  • the swinging leg is hinged to the front of the swivel base and is brought close to the side of the swivel base.
  • Fig. 1 is a schematic structural view of a leg device in the related art.
  • FIG. 2 is a schematic perspective view of a leg device in some embodiments of the present invention.
  • Figure 3 is a plan view showing the structure of the leg device shown in Figure 2.
  • Figure 4 is a partial enlarged view of the portion A of Figure 3.
  • Figure 5 is a plan view showing the structure of the leg device of Figure 3 when it is folded.
  • Figure 6 is a partial enlarged view of the portion B of Figure 5. detailed description
  • FIGS 2 and 3 illustrate a leg assembly in accordance with some embodiments of the present invention.
  • the leg assembly is a leg assembly for a concrete pump truck for providing support for the concrete pump truck during operation to prevent overturning.
  • the leg device can be mounted to the chassis 10 of a concrete pump truck in some embodiments, the chassis 10 being a concrete pump truck chassis, which is typically equipped with a pumping system, a boom system, a hydraulic system, and an electronic control system. Etc. (not shown). It will be appreciated that in other embodiments, the leg device can also be applied to other construction machinery such as truck cranes that require support for the legs.
  • the chassis 10 may, in some embodiments, include a swivel base 12, a drive train, a travel system, a steering system, and a brake system (not shown) for supporting a swing mechanism of a concrete pump truck (not shown) And connect the working weight and vibration of getting on and off the car and receiving the boom.
  • the slewing base 12 has a rectangular parallelepiped shape in some embodiments.
  • a circular accommodating portion 121 is disposed above the front portion of the slewing base 12 to receive the slewing mechanism.
  • the two corners of the front portion of the slewing base 12 extend horizontally from a connecting lug plate 123, respectively.
  • a connecting lug 125 is horizontally extended from each of the two corners.
  • the leg device includes two swinging front legs 21 and two swinging rear legs 23, respectively, which are respectively hinged to two connecting lugs 123 at the front of the swing base 12, and the two rear legs 23 are respectively hinged
  • the two front legs 21 and the two rear legs 23 are swingable back and forth in the plane of the swing base 12 on the two connecting lugs 125 at the rear of the swing base 12.
  • the front leg 21 is designed to resemble the configuration of a retractable antenna, but is also telescopic in the length direction, and its extended length and rear leg 23
  • the length is equivalent, such as The pumping force of the pumping vehicle is equivalent in four directions, and the front leg 21 shown in Fig. 2 has been swung to the working position, but has not been extended in the longitudinal direction.
  • a first cylinder 25 and a link mechanism 27 are disposed between each of the front legs 21 and the swing base 12, the first cylinder 25 is hinged to the swing base 12, and the link mechanism 27 connects the first cylinder 25 and the front branch
  • the legs 21 are connected to transmit the driving force generated by the first cylinder 25 to the front leg 21 to drive the front leg 21 to rotate relative to the swing base 12.
  • the link mechanism 27 is provided to shorten the stroke of the first cylinder 25, to reduce the manufacturing and maintenance cost of the first cylinder 25, and to shorten the time during which the front leg 21 is opened or closed, thereby improving work efficiency. It will be appreciated that in other embodiments, other telescoping drives may be utilized in place of the first cylinder 25.
  • the space for the rear leg 23 to be placed is relatively large, and the freedom of design and arrangement of the rear leg 23 and the second cylinder 29 is relatively large.
  • a second cylinder 29 is disposed between each of the rear legs 23 and the swing base 12, the second cylinder 29 is hinged to the rear end surface 121 of the swing base 12, and the other end is hinged to the rear leg 23.
  • the inner side surface 231 is configured to urge the rear leg 23 to rotate relative to the swing base 12. It will be appreciated that in some embodiments, the rear leg 23 may also employ the same drive mechanism as the front leg 21, as desired.
  • the link mechanism 27 includes a first link 270 and a second link 272.
  • One end of the first link 270 is hinged to the front leg 21 and the other end is hinged to the first cylinder 25.
  • One end of the second link 272 is hinged to the swing base 12, and the other end is hinged to the middle of the first link 270.
  • the first link 270, the second link 272, the front leg 21, and the swing base 12 constitute a planar four-bar linkage mechanism.
  • the second link 272 is hinged to the first link 270 to a distance at which the first link 270 is hinged to the front leg 21, less than the second link 272 is hinged to the first link 270.
  • the distance between the first link 270 and the first cylinder 25 is such that a lever effect can be generated, so that the driving force generated by the first cylinder 25 is transmitted to the front leg 21 through the link mechanism 27 and amplified.
  • the end portion of the first link 270 hinged with the first cylinder 25 is bent inwardly, so that the driving force generated by the first cylinder 25 is more converted into the driving force to the front leg 21, so that the transmission efficiency of the driving force is obtained.
  • the size of the first cylinder 25 can be reduced, the cost can be further reduced, and the weight of the pump truck can be reduced.
  • the top surface of the front leg 21 is formed with a protrusion 210 near the outer edge
  • the top surface of the swing base 12 is formed with protrusions 126, 127, wherein the protrusion 126 is located at the connecting ear of the swing base 12.
  • the plate 123 is adjacent to the front leg 21 and the swing base 12; the protrusion 127 is located at the middle of the top surface of the swing base 12 near the side.
  • the end of the first link 270 is hinged to the protrusion 210, the end of the second link 272 is hinged to the protrusion 126, and the end of the first cylinder 25 is hinged to the protrusion 127, such that the first cylinder 25
  • the link mechanism 27 is located above the front leg 21 and the swing base 12, and the first cylinder 25 and the link mechanism 27 move in a plane parallel to the front leg 21, and the front leg 21 and the swivel base can be well utilized.
  • the space in the vertical direction is such that the gap between the front leg 21 and the swing base 12 is reduced, thereby making the pump truck more compact.
  • the first cylinder 25 and the link mechanism 27 may be disposed below the bottom surface of the front leg 21 and the swing base 12, or at the side of the front leg 21 and the swing base 12, as needed.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
  • Vehicle Cleaning, Maintenance, Repair, Refitting, And Outriggers (AREA)

Abstract

一种工程机械用支腿装置，包括铰接于工程机械底盘（10）上的摆动式支腿（21）、伸缩式驱动装置（25）以及设置于所述摆动式支腿（21）与所述伸缩式驱动装置（25）之间的连杆机构（27），该连杆机构（27）用于将所述伸缩式驱动装置（25）产生的驱动力传递给所述摆动式支腿（21），以驱动该摆动式支腿（21）相对于所述底盘（10）摆动。以及一种混凝土泵车。

Description

工程机械用支腿装置及混凝土泵车
技术领域
本发明涉及工程机械领域， 特别涉及一种工程机械用支腿装置及具有 该支腿的混凝土泵车。 背景技术
诸如混凝土泵车、 汽车起重机等工程机械在工作时常需要采用支腿装 置进行支撑， 以避免作业时负荷过大而造成工程机械的倾覆， 支腿装置通 常包括两个前支腿及两个后支腿， 每个支腿都有收起和展开两种状态。 当 工程机械需要移动时， 需要收起支腿， 以便于移动； 当工程机械需要作业 时， 需要展开支腿， 以实现支撑。
图 1示出了一种混凝土泵车的支腿装置 40，该支腿装置 40包括铰接于 泵车底盘中的回转底座 30上的二摆动式前支腿 41及二摆动式后支腿 43， 每一支腿与回转底座 30之间采用单油缸 50驱动， 从而实现支腿的收起和 展开。 然而， 采用单油缸结构， 油缸的行程较长， 且力学设计也不尽合理， 油缸需要很大的力才能推开支腿； 尤其当泵车尺寸大， 行程长时， 采用该 结构更加显得不足， 具体而言包括如下几点：
1、 油缸在支腿展开与复位后， 占用空间大， 泵车侧面空间不够时， 将 会影响整个泵车的尺寸；
2、 需要很长的油缸才能达到设计的展开角度， 且泵车尺寸越大时所需 油缸行程越长； 长行程的油缸制造与维护费用高；
3、 单油缸需要很大的油缸力才能推开支腿， 为了提供大的油缸力， 需 要增加油缸的尺寸， 油缸的体积增加， 制造成本增加； 且会增加整个泵车 的重量。 发明内容
本发明所要解决的技术问题在于， 提供一种改进的工程机械用支腿装 置以及具有该支腿装置的混凝土泵车。
为解决上述技术问题， 本发明采用了如下技术方案：
一种工程机械用支腿装置， 包括铰接于工程机械底盘上的摆动式支腿、 伸缩式驱动装置以及设置于所述摆动式支腿与所述伸缩式驱动装置之间的 连杆机构， 该连杆机构用于将所述伸缩式驱动装置产生的驱动力传递给所 述摆动式支腿， 以驱动该摆动式支腿相对于所述底盘摆动。
优选地， 所述连杆机构包括第一连杆， 该第一连杆的一端铰接于所述 摆动式支腿上， 另一端铰接于所述伸缩式驱动装置上。
优选地， 所述连杆机构包括第二连杆， 该第二连杆的一端铰接于所述 底盘上， 另一端铰接于所述第一连杆上。
优选地， 该第二连杆与所述第一连杆、 摆动式支腿以及底盘构成平面 四连杆机构。
优选地， 所述第二连杆的所述另一端铰接于所述第一连杆的中部。 优选地， 所述第二连杆与所述第一连杆铰接处到所述第一连杆与所述 摆动式支腿铰接处的距离， 小于所述第二连杆与所述第一连杆铰接处到所 述第一连杆与伸缩式驱动装置铰接处的距离。
优选地， 所述第一连杆的所述另一端向内弯曲。
优选地， 所述伸缩式驱动装置为液压油缸。
优选地， 所述伸缩式驱动装置及所述连杆机构设置于所述摆动式支腿 上方或下方。
本发明还提供一种混凝土泵车， 包括底盘以及上述任一项所述的工程 机械用支腿装置， 所述摆动式支腿以及伸缩式驱动装置铰接于该底盘上。
优选地， 所述底盘包括回转底座， 所述摆动式支腿以及伸缩式驱动装 置铰接于该回转底座上。
优选地， 所述摆动式支腿铰接于该回转底座的前部， 且收拢时紧邻该 回转底座的侧面。
由于采用了上述技术方案， 与伸缩式驱动装置与支腿直接连接时相比， 可以降低伸缩式驱动装置的行程。 附图说明
图 1为相关技术中的支腿装置的结构示意图。
图 2为本发明一些实施例中的支腿装置的立体结构示意图。
图 3为图 2所示支腿装置的平面结构示意图。
图 4为图 3中 A部位的局部放大图。
图 5为图 3所示支腿装置的在收拢时的平面结构示意图。
图 6为图 5中 B部位的局部放大图。 具体实施方式
下面将结合附图及具体实施例来对本发明进一步详细说明。
图 2及图 3示出了本发明一些实施例中的支腿装置， 该支腿装置为混 凝土泵车用支腿装置， 用以为混凝土泵车在工作过程中提供支撑， 防止翻 车。 该支腿装置在一些实施例中可安装于混凝土泵车的底盘 10上， 该底盘 10作为混凝土泵车底盘， 其上通常还安装有的泵送系统、 臂架系统、 液压 系统以及电控系统等 （图未示）。 可以理解地， 在其他一些实施例中， 该支 腿装置也可以应用于汽车起重机等其他需要支腿进行支撑的工程机械上。
底盘 10在一些实施例中可包括回转底座 12、传动系、 行驶系、 转向系 以及制动系等 （未图示）， 该回转底座 12用于支撑混凝土泵车的回转机构 (未图示）， 并连接上下车及承受上车的臂架的工作重量及振动。 回转底座 12在一些实施例略呈长方体形， 回转底座 12前部上方开设有圆形收容部 121， 以收容回转机构； 回转底座 12前部的两角落分别水平延伸出一连接 耳板 123， 后部两角落分别水平延伸出一连接耳板 125。
支腿装置包括二摆动式前支腿 21以及二摆动式后支腿 23，该二前支腿 21分别铰接于回转底座 12前部的二连接耳板 123上， 该二后支腿 23分别 铰接于回转底座 12后部的二连接耳板 125上， 该二前支腿 21及该二后支 腿 23均能于回转底座 12所在的平面内来回摆动。 在一些实施例中， 受限 于泵车空间的限制， 前支腿 21被设计成类似可收缩式天线的构造， 而在长 度方向还可以伸缩， 并且其伸展出来后的长度与后支腿 23的长度相当， 如 此泵车在四个方向的支撑力相当， 图 2所示的前支腿 21已经摆动到了作业 位置， 但尚未沿长度方向伸展开来。
每一前支腿 21与回转底座 12之间均设置有第一油缸 25及连杆机构 27， 第一油缸 25—端铰接于回转底座 12上， 连杆机构 27将第一油缸 25与前 支腿 21相连， 用于将第一油缸 25产生的驱动力传递给前支腿 21， 以驱动 该前支腿 21相对于回转底座 12转动。连杆机构 27设置可以缩短第一油缸 25的行程， 使第一油缸 25的制造及维护成本降低， 另外， 还可以缩短前支 腿 21张开或收拢的时间， 提高了工作效率。 可以理解地， 在其他的一些实 施例中， 也可以采用其他的伸缩式驱动装置替代第一油缸 25。
在一些实施例中， 由于后支腿 23所在的位置远离回转机构， 能够供后 支腿 23放置的空间比较富余， 后支腿 23及第二油缸 29设计与布置的自由 度比较大。 如图所示， 每一后支腿 23与回转底座 12之间均设置有第二油 缸 29， 第二油缸 29—端铰接于回转底座 12的后端面 121， 另一端铰接于 后支腿 23的内侧面 231， 以推动后支腿 23相对于回转底座 12转动。 可以 理解地， 在一些实施例中， 根据需要， 后支腿 23 也可以采用与前支腿 21 一样的驱动机构。
再如图 3及图 4所示，连杆机构 27包括第一连杆 270及第二连杆 272。 第一连杆 270的一端铰接于前支腿 21上， 另一端铰接于第一油缸 25上。 第二连杆 272的一端铰接于回转底座 12上， 另一端铰接于第一连杆 270的 中部。 第一连杆 270、 第二连杆 272、 前支腿 21以及回转底座 12构成一平 面四连杆机构。
在一些实施例中，第二连杆 272与第一连杆 270铰接处到第一连杆 270 与前支腿 21铰接处的距离， 小于第二连杆 272与第一连杆 270铰接处到所 述第一连杆 270与第一油缸 25铰接处的距离， 如此， 可以产生杠杆效应， 使第一油缸 25产生的驱动力经过连杆机构 27传递给前支腿 21后得到了放 大。 另外， 第一连杆 270与第一油缸 25铰接的端部向内弯曲， 使得第一油 缸 25产生的驱动力更多地转化为对前支腿 21 的驱动力， 使得驱动力的传 递效率得到了提升， 如此， 一个方面整个结构的使用寿命得到了较大的提 升， 另一个方面可以减少第一油缸 25的尺寸， 进一步降低成本， 并能够减 轻泵车的重量。
再如图 2所示， 前支腿 21的顶面靠近外侧缘处成有突起部 210， 回转 底座 12的顶面形成有突起部 126、 127， 其中， 突起部 126位于回转底座 12的连接耳板 123上， 并邻近于前支腿 21与回转底座 12铰接处； 突起部 127位于回转底座 12顶面中部靠近侧边处。 第一连杆 270的端部铰接于突 起部 210上， 第二连杆 272的端部铰接于突起部 126上， 第一油缸 25的端 部铰接于突起部 127上， 如此， 第一油缸 25及连杆机构 27位于前支腿 21 与回转底座 12的上方， 第一油缸 25及连杆机构 27在平行于前支腿 21所 在的平面运动， 能够很好地利用前支腿 21及回转底座 12垂直方向的空间， 使得前支腿 21收拢时与回转底座 12之间的间隙减少， 从而使泵车更加紧 凑。 可以理解地， 根据需要， 第一油缸 25及连杆机构 27也可以设置在前 支腿 21与回转底座 12的底面下方， 抑或设置在前支腿 21与回转底座 12 的侧面。
以上仅为本发明的优选实施例而己， 并不用于限制本发明， 对于本领 域的技术人员来说， 本发明可以有各种更改和变化。 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. 一种工程机械用支腿装置， 包括铰接于工程机械底盘上的摆动式支 腿以及伸缩式驱动装置， 其特征在于： 还包括设置于所述摆动式支腿与所 述伸缩式驱动装置之间的连杆机构， 该连杆机构用于将所述伸缩式驱动装 置产生的驱动力传递给所述摆动式支腿， 以驱动该摆动式支腿相对于所述 底盘摆动。
2. 根据权利要求 1所述的工程机械用支腿装置， 其特征在于： 所述连 杆机构包括第一连杆， 该第一连杆的一端铰接于所述摆动式支腿上， 另一 端铰接于所述伸缩式驱动装置上。
3. 根据权利要求 2所述的工程机械用支腿装置， 其特征在于： 所述连 杆机构包括第二连杆， 该第二连杆的一端铰接于所述底盘上， 另一端铰接 于所述第一连杆上。
4. 根据权利要求 3所述的工程机械用支腿装置， 其特征在于： 该第二 连杆与所述第一连杆、 摆动式支腿以及底盘构成平面四连杆机构。
5. 根据权利要求 3所述的工程机械用支腿装置， 其特征在于： 所述第 二连杆的所述另一端铰接于所述第一连杆的中部。
6. 根据权利要求 5所述的工程机械用支腿装置， 其特征在于： 所述第 二连杆与所述第一连杆铰接处到所述第一连杆与所述摆动式支腿铰接处的 距离， 小于所述第二连杆与所述第一连杆铰接处到所述第一连杆与伸缩式 驱动装置铰接处的距离。
7. 根据权利要求 2-6中任意一项所述的工程机械用支腿装置， 其特征 在于： 所述第一连杆的所述另一端向内弯曲。
8. 根据权利要求 1所述的工程机械用支腿装置， 其特征在于： 所述伸 缩式驱动装置为液压油缸。
9. 根据权利要求 1所述的工程机械用支腿装置， 其特征在于： 所述伸 缩式驱动装置及所述连杆机构设置于所述摆动式支腿上方或下方。
10. 一种混凝土泵车， 包括底盘， 其特征在于： 还包括权利要求 1至 9 中任一项所述的工程机械用支腿装置， 所述摆动式支腿以及伸缩式驱动装 置铰接于该底盘上。
11. 根据权利要求 10所述的混凝土泵车， 其特征在于： 所述底盘包括 回转底座， 所述摆动式支腿以及伸缩式驱动装置铰接于该回转底座上。
12. 根据权利要求 11所述的混凝土泵车， 其特征在于： 所述摆动式支 腿铰接于该回转底座的前部， 且收拢时紧邻该回转底座的侧面。
PCT/CN2012/082685 2011-10-24 2012-10-10 工程机械用支腿装置及混凝土泵车 WO2013060232A1 (zh)

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WO2015177160A1 (de) * 2014-05-20 2015-11-26 Putzmeister Engineering Gmbh Fahrbare betonpumpe mit einer stützkonstruktion
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