WO2014023074A1 - 混凝土喷射机的箱形臂节、箱形臂架和混凝土喷射机 - Google Patents

混凝土喷射机的箱形臂节、箱形臂架和混凝土喷射机 Download PDF

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Publication number
WO2014023074A1
WO2014023074A1 PCT/CN2012/086105 CN2012086105W WO2014023074A1 WO 2014023074 A1 WO2014023074 A1 WO 2014023074A1 CN 2012086105 W CN2012086105 W CN 2012086105W WO 2014023074 A1 WO2014023074 A1 WO 2014023074A1
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WIPO (PCT)
Prior art keywords
box
shaped arm
section
arm section
shaped
Prior art date
Application number
PCT/CN2012/086105
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English (en)
French (fr)
Inventor
郭岗
闫琼
刘小明
希波拉·Dc·大卫
Original Assignee
中联重科股份有限公司
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Application filed by 中联重科股份有限公司 filed Critical 中联重科股份有限公司
Publication of WO2014023074A1 publication Critical patent/WO2014023074A1/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
    • B66C23/62Constructional features or details
    • B66C23/64Jibs
    • B66C23/70Jibs constructed of sections adapted to be assembled to form jibs or various lengths
    • B66C23/701Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic
    • B66C23/707Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic guiding devices for telescopic jibs
    • 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
    • B66C23/62Constructional features or details
    • B66C23/64Jibs
    • B66C23/70Jibs constructed of sections adapted to be assembled to form jibs or various lengths
    • B66C23/701Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic

Definitions

  • the present invention relates to the field of construction machinery, and in particular to a box arm section of a concrete jet machine, a box arm frame of a concrete jet machine including the box arm section, and a concrete body including the box arm frame Jet machine. Background technique
  • the concrete jet machine generally includes a turntable 10 and a box-shaped boom 20 hinged to the turntable.
  • the center axis L of the turntable 10 is horizontal, and the turntable 10 can drive the box-shaped boom 20 around.
  • the central axis L rotates.
  • a concrete injection pipe (not shown) is also fixed to the box boom 20.
  • the cross section of the box boom is usually rectangular.
  • the box boom 20 In normal operation, the box boom 20 is subjected to its own weight and the gravity of the concrete jet pipe, so that internal stress is generated inside the box boom.
  • a box arm section of a concrete jet machine having at least four side walls, wherein a cross section of the box arm section is positive Polygon.
  • the box arm section has four side walls, and the box arm section has a square cross section.
  • the four corners of the square are formed with chamfers.
  • the front end of the box-shaped arm joint is provided with a front reinforcing plate, and/or the rear end of the box-shaped arm joint is provided with a rear reinforcing plate.
  • a front reinforcing plate is disposed at a front end of the box-shaped arm joint, and the front reinforcing plate is coated on an outer surface of the box-shaped arm joint, and the front reinforcing plate is provided with a cylinder mounting seat.
  • a box boom of a concrete jet machine the box boom being hinged to a turntable, a center axis of the turntable being horizontal, and the turntable capable of driving the
  • the box-shaped arm frame rotates about the central axis, and the box-shaped arm frame includes at least one box-shaped arm joint, which is the above-mentioned box-shaped arm joint provided by the present invention.
  • the box-shaped arm frame comprises at least two sections of the box-shaped arm section, and the box-shaped arm section of the preceding section is inserted into the cavity of the box-shaped arm section of the latter section.
  • the outer surface of the plurality of the side walls of the box-shaped arm joint of the previous section forms a gap with the inner surface of the plurality of side walls of the box-shaped arm joint of the latter section, the previous one a rear support plate is disposed on an outer surface of the rear end portion of the side wall of the box arm section, and a front surface is provided on an inner surface of the front end portion of the side wall of the box arm joint of the latter section
  • a support plate, the front support plate and the rear support plate are disposed in the gap to support the front box arm section in the rear box arm section.
  • the gap between the two adjacent box-shaped arm segments includes a plurality of portions corresponding to the plurality of side walls of the box-shaped arm segment, the box arm of the latter section
  • the front support plate on the section and the rear support plate on the box arm section of the previous section are respectively disposed in different portions of the gap between the adjacent two box-shaped arm sections.
  • the height of the front support plate and the height of the rear support plate are both smaller than the difference between the heights of the front box arm section and the box arm section of the latter section by 0.5 mm to 2 mm.
  • the outer surface of the rear end portion of the side wall of the box arm section of the previous section is further provided with a rear stopper located in front of the rear support plate, and the box in the latter section a front stopper is disposed on an inner surface of the front end portion of the side wall of the arm joint, the front stopper is located at a rear of the front support plate, and the rear stopper is located behind the front stopper, and is provided with
  • the side wall of the rear block is opposite to the side wall provided with the front block, so that the front block can be coupled with the rear block when the box-shaped arm is extended Collided.
  • the rear block on the box arm section of the current section collides with the front block on the box arm section of the latter section, the rear block faces the front 80% to 99% of the surface of the stopper coincides with the surface of the front stopper facing the rear stopper.
  • the front stopper and the rear stopper are both a block body made of a material having elasticity.
  • the box boom further comprises a multi-stage telescopic cylinder mounted on the outer surface of the plurality of box arm sections through the cylinder mount.
  • a concrete jet machine the concrete jet
  • the machine includes a turntable and a box-shaped boom hinged to the turntable, the center axis of the turntable is horizontal, and the turntable can drive the box-shaped arm to rotate about the central axis, wherein
  • the box-shaped arm frame is the above-mentioned box-shaped arm frame provided by the present invention.
  • the distance between the materials on the cross section of the box boom is not much different from the center of the cross section of the box boom, so Regardless of the angle at which the rotary table drives the box-shaped boom to rotate, the difference in the inertial product of the cross-section of the box-shaped boom is not too large, so that the internal stress of the box-shaped boom does not change too much, which is advantageous for the extension box.
  • the life of the boom is not too large, so that the internal stress of the box-shaped boom does not change too much, which is advantageous for the extension box.
  • Figure 1 is a perspective view showing a state of a concrete jet machine of the prior art
  • Figure 2 is a schematic cross-sectional view of the box boom of the concrete jet of Figure 1;
  • Figure 3 is a schematic cross-sectional view of the concrete boom of the concrete jet of Figure 1 after being rotated 90°;
  • Figure 4 is a perspective view of the concrete jet of an embodiment of the present invention;
  • Figure 5 is a schematic cross-sectional view of the box arm section of the concrete jet machine of Figure 4.
  • Figure 6 is a schematic cross-sectional view showing a box arm section of another embodiment of the present invention.
  • Figure 7 is a front elevational view of a portion of the box boom of the present invention.
  • Figure 8 is a side elevational view of the box boom shown in Figure 7;
  • Figure 9 is a cross-sectional view taken along line A-A of the box-shaped boom shown in Figure 8;
  • Figure 10 is a cross-sectional view along line BB of the box boom shown in Figure 8. Description of the reference numerals
  • the positional word “front” refers to the right side in Figs. 4 and 7, and the “post” refers to "left side” in Figs. 4 and 7 without saying to the contrary.
  • a box arm section 30 of a concrete jet machine is provided, the box arm section 30 having at least four side walls 31, as shown in Figs. 5 and 6, the box arm section 30
  • the cross section is a regular polygon.
  • the cross section of the box arm section 30 may be positive. Quadrilateral, regular pentagon, regular hexagon, etc. Generally, the more the cross-sectional side of the box arm section 30, the smaller the internal stress variation experienced by the box arm section 30.
  • the box arm section 30 may have four side walls, and the box arm section 30 may have a square cross section.
  • the four corners of the square are formed with chamfers.
  • the box arm section 30 is formed with a circular chamfer, and in Fig. 6, the box arm section
  • a 45° bevel angle is formed on the 30.
  • the front reinforcing plate 36 may be provided at the front end of the box arm section.
  • the front reinforcing plate 36 may be a steel plate fixed to the outer surface of the box arm section 30 by welding.
  • the rear reinforcing plate 37 may be provided at the rear end of the box arm section 30.
  • the rear reinforcing plate 37 may be a steel plate fixed to the inner surface of the box arm joint 30 by welding.
  • the plurality of box arm sections 30 of the present invention are mounted together to form a box-shaped boom.
  • the cylinder can be used to control the expansion and contraction of the box-shaped boom.
  • the cylinder mounting seat 40a may be provided on the front reinforcing plate 36 as shown in FIG.
  • a box boom 20 of a concrete jet machine which is hinged to a turntable 10, and a center axis L of the turntable 10 In the horizontal direction, and the rotary table 10 can drive the box-shaped arm frame 20 to rotate about the central axis L
  • the box-shaped arm frame 20 includes at least one box-shaped arm joint 30, and the box-shaped arm joint 30 is composed of four side walls 31.
  • the box arm section 30 is the above-mentioned box arm section provided by the present invention.
  • the cross section of the box arm section 30 is a regular polygon, the distance from the center of the cross section to the outer surface of the box arm section 30 is not much different in the cross section of the box arm frame 20, when the box arm When the frame 20 is rotated, the cross-sectional inertia product of the box-shaped arm section 30 does not change much.
  • the cross-sectional inertia product of the box arm section 30 is constant, so that the box boom 20 is in two working states (ie, a state and a rotation from the state 90)
  • the state after °) is equal to the internal stress.
  • the internal stress inside the box-shaped arm frame 20 does not change much, so that the internal stress variation can be avoided.
  • the box arm section 30 is damaged, extending the service life of the box arm section 30.
  • the box boom 20 may include a box arm section 30, and may also include a multi-section box arm section 30.
  • the box boom 20 includes at least two box arm sections 30 into which the front box arm section 30 is inserted into the cavity of the rear box arm section 30, thereby allowing the box arm during operation
  • the frame 20 is capable of telescopic.
  • a pulley mechanism may be provided inside the box-shaped arm section 30, or a cylinder may be provided outside the box-shaped arm section 30.
  • the outer surface of the side wall 31 of the front box arm section 30 may directly contact the inner surface of the side wall of the next box arm section 30.
  • the front-section box-shaped arm sections 30 can be supported on the rear-section box-shaped arm sections 30. internal. As shown in the figure, a gap 31a is formed between the outer surface of the plurality of side walls 31 of the front box arm section 30 and the inner surface of the plurality of side walls 31 of the rear box arm section 30.
  • a rear support plate 35 is disposed on an outer surface of a rear end portion of the side wall 31 of the box arm section 30, and a front support plate 33 is disposed on an inner surface of the front end portion of the side wall 31 of the rear box arm section 30.
  • the front support plate 33 on the rear box arm section 30 and the rear support plate 35 on the front arm section 30 are disposed in the gap 31a to support the front box arm section 30 in the latter section. In the box arm section 30.
  • the front support plate 33 and the rear support plate 35 reduce the contact area between the front box arm section 30 and the rear box arm section 30, thereby reducing the reduction The friction of the adjacent two box-shaped arm segments 30 when sliding relative to each other. Further, another function of the front support plate 33 and the rear support plate 35 is to guide the expansion and contraction of the box-shaped arm frame 20.
  • the front support plate 33 and the rear support plate 35 there is no special requirement for the number and arrangement positions of the front support plate 33 and the rear support plate 35 as long as the front support plate 33 and the rear support plate 35 can support the front frame arm section 30 in the latter section.
  • the box arm section 30 can be used.
  • the front support plate 33 and the rear support plate 35 may be fixed to the side wall 31 of the rear box arm section 30 and the side wall 31 of the front box arm section 30 by welding or the like, respectively.
  • the front support plate 33 and the rear support plate 35 are respectively fixed to the side wall 31 of the box-shaped arm section 30 and the front box by fasteners (e.g., screws).
  • Arm section 30 On the side wall 31.
  • the gap between the outer surface of the side wall 31 of the front box arm section 30 and the inner surface of the side wall 31 of the rear box arm section 30 31 can be divided into multiple parts.
  • the plurality of portions of the gap 31a are in one-to-one correspondence with the plurality of side walls 31 of the box arm section 30.
  • the box arm section 30 shown in Fig. 8 has a square cross section, and therefore, the gap 31a between the adjacent two box arm sections 30 is divided into four parts.
  • the front support plate 33 on the rear box arm section 30 and the rear support plate 35 on the front box arm section 30 are respectively disposed in adjacent two sections. In a different portion of the gap 31a between the box arms 30.
  • no interference occurs between the front support plate 33 and the rear support plate 35.
  • the cross-sectional area of the front box arm section 30 is smaller than the cross-sectional area of the rear box arm section 30.
  • the heights of the front support plate 33 and the rear support plate 35 are smaller than the previous box-shaped arm sections 30 and the latter one.
  • the height difference of the box arm section 30 is one-half.
  • the heights of the front support plate 33 and the rear support plate 35 may be 0.5 mm to 2 mm smaller than one-half the height difference between the previous box arm section 30 and the rear box arm section 30, thereby ensuring a box shape.
  • the boom 20 is flexible and flexible.
  • the side wall 31 of the front box arm section 30 The rear surface of the rear end portion is further provided with a rear stopper 34 which is located in front of the rear support plate 35, and the front surface of the front end portion of the side wall 31 of the rear box-shaped arm joint 30 is provided with a front portion
  • the stopper 32 is located at the rear of the front support plate 33, and the rear stopper 34 is located behind the front stopper 32, and is provided with the side wall 31 of the rear stopper 34 and the side wall 31 provided with the front stopper 32.
  • the front stop 32 can collide with the rear stop 34 when the box boom 20 is extended.
  • the front support plate 33 is a first surface
  • the surface of the front support plate 33 that is in contact with the inner surface of the box arm section 30 is a first surface
  • the surface of the front support plate 33 opposite to the first surface is a second surface
  • the front support Board 33 Height refers to the distance between the first surface and the second surface.
  • the height direction of the rear support plate 35, the height direction of the front stopper 32, and the height direction of the rear stopper 34 coincide with the height direction of the front support plate 33, and details are not described herein.
  • front stopper 32 and the rear stopper 34 there is no special requirement for the specific positions of the front stopper 32 and the rear stopper 34, as long as the front stopper 32 and the rear stopper 34 can collide when the box-shaped boom 20 is extended to the maximum stroke, Prevent the front box arm section 30 and the rear box arm section 30 from coming out.
  • the rear block 34 and the rear box arm section on the current box arm section 30 When the front stopper 32 on the 30 collides, 80% to 99% of the surface of the rear stopper 34 toward the front stopper 32 coincides with the surface of the front stopper 32 toward the rear stopper 34.
  • the front stopper 32 and the rear stopper 34 may have exactly the same shape, and therefore, the side surface of the front stopper 32 may be aligned with the side surface of the rear stopper 34, thereby securing the box arm section in the rear section.
  • the rear end surface of the front stopper 32 and the front end surface of the rear stopper 34 have a large overlapping area.
  • both the front stop 32 and the rear stop 34 It is a block made of a material having elasticity.
  • the front stopper 32 and the rear stopper 34 are made of a rubber material.
  • the "block” may be a rectangular parallelepiped, a cube, a cylinder or the like.
  • the expansion and contraction of the box-shaped boom 20 can be controlled in various ways.
  • a pulley may be provided on the box arm section 30, and the telescopic expansion of the box arm frame 20 may be controlled by a pulley, or a telescopic cylinder may be provided on the box arm frame 20, and the box arm frame may be controlled by controlling the expansion and contraction of the oil cylinder.
  • 20 telescopic Preferably, as shown in FIG. 4, in order to simplify the structure of the box arm section 30, the box boom 20 may further include a multi-stage telescopic cylinder 40 which may be disposed in front of the box arm section 30. A cylinder mount 40a on the reinforcing plate is mounted on the outer surface of the box arm section 30.
  • a concrete jet machine As shown in FIG. 4, the concrete jet machine includes a turntable 10 and a box-shaped boom 20 hinged to the turntable 10, which is rotated.
  • the center axis L of the table 10 is horizontal, and the turntable 10 can drive the box boom 20 to rotate about the central axis L.
  • the box boom 20 is the box arm provided by the present invention.
  • the inertial product of the cross-section of the box-shaped boom does not change much, so the internal stress does not change much, and it is not easily damaged by the internal stress.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jib Cranes (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)

Abstract

一种用于混凝土喷射机的箱形臂节(30),该箱形臂节(30)具有至少四个侧壁(31),其中,该箱形臂节(30)的横截面为正多边形。一种包括这种箱形臂节(30)的用于混凝土喷射机的箱形臂架(20)和一种包括这种箱形臂架(20)的混凝土喷射机。通过将箱形臂节(30)的横截面设置为正多边形,可以使得箱形臂架(20)的内应力变化不会太大,有利于延长箱形臂架(20)的使用寿命。

Description

混凝土喷射机的箱形臂节、 箱形臂架和混凝土喷射机 技术领域
本发明涉及工程机械领域, 具体地, 涉及一种混凝土喷射机的箱形臂 节、 一种包括该箱形臂节的混凝土喷射机的箱形臂架和一种包括该箱形臂 架的混凝土喷射机。 背景技术
如图 1所示, 通常混凝土喷射机包括回转台 10和与该回转台铰接的箱 形臂架 20, 回转台 10的中心轴线 L为水平方向, 并且回转台 10能够带动 箱形臂架 20绕中心轴线 L转动。 在箱形臂架 20上还固定有混凝土喷射管 (未示出)。 箱形臂架的截面通常为长方形。
但是, 这种截面为长方形的箱形臂架非常容易损坏, 因此, 如何提高 箱形臂架的使用寿命成为本领域亟待解决的技术问题。 发明内容
本发明的目的是提供一种混凝土喷射机的箱形臂节、 一种包括该箱形 臂节的混凝土喷射机的箱形臂架和一种包括该箱形臂架的混凝土喷射机。 将所述箱形臂节用于箱形臂架中后, 在施工过程中, 箱形臂节所受的内应 力变化不大。
经本发明的发明人研宄发现, 现有技术中的用于混凝土喷射机的箱形 臂架容易损坏的具体原因如下:
当箱形臂架 20旋转至图 1中的状态时,即箱形臂架的一个侧面 A朝下, 此时, 臂架的截面图如图 2所示。
当回转台 10绕中心轴线 L旋转 90° 之后, 箱形臂架 20旋转与侧面 A 相邻的侧面 B朝下, 其横截面如图 3所示。
在正常操作时, 箱形臂架 20受到自身重力以及混凝土喷射管的重力作 用, 因此, 箱形臂架内部会产生内应力。
内应力公式为 σ = ,图 2中所示的状态中,臂架横截面惯性积 /ζ1 =^ 在图 3所示的状态中, 臂架横截面惯性积 /ζ2 = ^。 由于在旋转过程中, 箱
11 12
形臂架以及混凝土喷射管的受力状态不变, 因此, My不变, 而 a和 b之间 有差值, 因此, 两种状态下内应力变化较大。 而内应力变化大容易是臂架 损坏。
为了实现本发明的目的, 作为本发明的一个方面, 提供一种混凝土喷 射机的箱形臂节, 该箱形臂节具有至少四个侧壁, 其中, 该箱形臂节的横 截面为正多边形。
优选地, 所述箱形臂节具有四个侧壁, 所述箱形臂节的横截面为正方 形。
优选地, 所述正方形的四个角部形成有倒角。
优选地, 所述箱形臂节的前端设置有前加强板, 和 /或所述箱形臂节的 后端设置后加强板。
优选地, 所述箱形臂节的前端设置有前加强板, 所述前加强板包覆在 所述箱形臂节的外表面上, 所述前加强板上设置有油缸安装座。
作为本发明的另一个方面, 还提供一种混凝土喷射机的箱形臂架, 该 箱形臂架与回转台铰接, 该回转台的中心轴线为水平方向, 并且所述回转 台能够带动所述箱形臂架绕所述中心轴线转动, 所述箱形臂架包括至少一 节箱形臂节, 该箱形臂节为本发明提供的上述箱形臂节。
优选地, 所述箱形臂架包括至少两节所述箱形臂节, 前一节所述箱形 臂节插入后一节所述箱形臂节的空腔中。 优选地, 前一节所述箱形臂节的多个所述侧壁的外表面与后一节所述 箱形臂节的所述多个侧壁的内表面之间形成有间隙, 前一节所述箱形臂节 的所述侧壁的后端部的外表面上设置有后支撑板, 后一节所述箱形臂节的 所述侧壁的前端部的内表面上设置有前支撑板, 该前支撑板和所述后支撑 板设置在所述间隙之中, 以将所述前一节箱形臂节支撑在所述后一节箱形 臂节中。
优选地, 相邻两节所述箱形臂节之间的所述间隙包括与所述箱形臂节 的所述多个侧壁一一对应的多个部分, 后一节所述箱形臂节上的所述前支 撑板和前一节所述箱形臂节上的所述后支撑板分别设置在相邻两节所述箱 形臂节之间的所述间隙的不同部分中。
优选地, 所述前支撑板的高度和所述后支撑板的高度均比所述前一节 箱形臂节与后一节所述箱形臂节的高度之差小 0.5mm至 2mm。
优选地, 前一节所述箱形臂节的所述侧壁的后端部的外表面上还设置 有后挡块, 该后挡块位于所述后支撑板前方, 后一节所述箱形臂节的所述 侧壁的前端部的内表面上设置有前挡块, 该前挡块位于所述前支撑板的后 方, 所述后挡块位于所述前挡块后方, 且设置有所述后挡块的所述侧壁与 设置有所述前挡块的所述侧壁相对, 以使得在所述箱形臂架伸长时, 所述 前挡块能够与所述后挡块相撞。
优选地, 当前一节所述箱形臂节上的所述后挡块与后一节所述箱形臂 节上的所述前挡块相撞时, 所述后挡块上朝向所述前挡块的表面的 80%至 99%与所述前挡块上朝向所述后挡块的表面重合。
优选地, 所述前挡块与所述后挡块均为由具有弹性的材料制成的块状 体。
优选地, 所述箱形臂架还包括多级伸缩油缸, 该多级伸缩油缸通过所 述油缸安装座安装在多节所述箱形臂节的外表面上。
作为本发明的再一个方面, 还提供一种混凝土喷射机, 该混凝土喷射 机包括回转台和与该回转台铰接的箱形臂架, 所述回转台的中心轴线为水 平方向, 并且所述回转台能够带动所述箱形臂架绕所述中心轴线转动, 其 中, 所述箱形臂架为本发明所提供的上述箱形臂架。
通过将用于混凝土喷射机的箱形臂架的横截面设置为正多边形, 使得 箱形臂架的横截面上的各处材料距离该箱形臂架的横截面中心的距离相差 不大, 因此, 不管回转台带动箱形臂架回转至何种角度, 箱形臂架的横截 面惯性积相差都不会太大, 从而使得箱形臂架的内应力变化不会太大, 有 利于延长箱形臂架的使用寿命。
本发明的其他特征和优点将在随后的具体实施方式部分予以详细说 明。 附图说明
附图是用来提供对本发明的进一步理解, 并且构成说明书的一部分, 与下面的具体实施方式一起用于解释本发明, 但并不构成对本发明的限制。 在附图中:
图 1是现有技术中混凝土喷射机的一种状态的立体图;
图 2是图 1中的混凝土喷射机的箱形臂架的截面示意图;
图 3是图 1中的混凝土喷射机的箱形臂架旋转 90° 后的截面示意图; 图 4是本发明的一种实施方式的混凝土喷射机的立体图;
图 5是图 4中混凝土喷射机的箱形臂节的截面示意图;
图 6是本发明的另一种实施方式的箱形臂节的截面示意图;
图 7是本发明所述的箱形臂架的一部分的主视图;
图 8是图 7中所示的箱形臂架的侧视图;
图 9是图 8中所示的箱形臂架的 A-A剖视图; 和
图 10是图 8中所示的箱形臂架的 B-B剖视图。 附图标记说明
10 回转台
30 箱形臂节
32 前挡块 前支撑板
34 后挡块 后支撑板
36 前加强板 后加强板
40 多级伸缩油缸
40a 油缸安装座 具体实施方式
以下结合附图对本发明的具体实施方式进行详细说明。应当理解的是, 此处所描述的具体实施方式仅用于说明和解释本发明, 并不用于限制本发 明。
在本发明中, 在不作相反说明的情况下, 方位词 "前"是指图 4和图 7 中的右侧, 而方位词 "后"是指图 4和图 7中的 "左侧 "。
作为本发明的一个方面, 提供一种混凝土喷射机的箱形臂节 30, 该箱 形臂节 30具有至少四个侧壁 31, 如图 5和图 6所示, 该箱形臂节 30的横 截面为正多边形。
在本发明中, 对箱形臂节 30的横截面的边数没有特殊要求, 对箱形臂 节 30的侧壁 31的数量也没有特殊要求, 例如, 箱形臂节 30的横截面可以 是正四边形、 正五边形、 正六边形等。 通常来讲, 箱形臂节 30的横截面边 越多, 箱形臂节 30受到的内应力变化越小。 为了便于加工, 优选地, 箱形 臂节 30可以具有四个侧壁, 且箱形臂节 30的横截面可以为正方形。
如图 5和图 6所示, 箱形臂节 30的横截面边长为 C, 其横截面惯性积 Iz = ^ , 旋转 90° 之后, 横截面惯性积仍然为 /z = 。 因此, 当箱形臂节 - 12 - 12 30用于箱形臂架中时, 即便箱形臂架旋转 90度, 箱形臂节 30中的内应力 也并无变化。
为了便于加工制造并避免应力集中, 优选地, 所述正方形的四个角部 形成有倒角。
如图 5所示, 箱形臂节 30上形成有圆形倒角, 而在图 6中, 箱形臂节
30上形成有 45 ° 的斜倒角。
为了增加箱形臂节 30前端的刚度, 优选地, 可以在箱形臂节的前端设 置前加强板 36。 前加强板 36可以为通过焊接固定在箱形臂节 30的外表面 上的钢板。 同理, 为了增加箱形臂节 30后端的刚度, 优选地, 可以在箱形 臂节 30的后端设置后加强板 37。 后加强板 37可以是通过焊接的方式固定 在箱形臂节 30的内表面上的钢板。
多节本发明所述的箱形臂节 30安装在一起可以形成箱形臂架, 在本发 明中, 可以利用油缸控制箱形臂架的伸缩。 为了便于安装油缸, 优选地, 可以在前加强板 36上设置有油缸安装座 40a, 如图 4所示。
如图 4和图 7所示, 作为本发明的另一个方面, 提供一种混凝土喷射 机的箱形臂架 20, 该箱形臂架 20与回转台 10铰接, 该回转台 10的中心轴 线 L为水平方向, 并且回转台 10能够带动箱形臂架 20绕所述中心轴线 L 转动, 箱形臂架 20包括至少一节箱形臂节 30, 该箱形臂节 30由四块侧壁 31围成, 其中, 箱形臂节 30为本发明所提供的上述箱形臂节。
由于箱形臂节 30的横截面为正多边形, 因此, 在箱形臂架 20的横截 面上, 箱形臂节 30外表面上各处距离横截面中心的距离相差不大, 当箱形 臂架 20旋转时, 箱形臂节 30的横截面惯性积变化也不大。
并且, 当箱形臂架 20旋转 90° 后, 箱形臂节 30的横截面惯性积不变, 从而使箱形臂架 20在两种工作状态(即, 一种状态和从该状态旋转 90° 后 的状态) 所受到的内应力相等。 并且, 在箱形臂架 20旋转的过程中, 箱形 臂架 20内部的内应力变化也不大, 从而可以避免由于内应力变化而引起的 箱形臂节 30损坏, 延长了箱形臂节 30的使用寿命。
如上所述, 箱形臂架 20可以包括一节箱形臂节 30, 也可以包括多节箱 形臂节 30。 在大部分情况下, 箱形臂架 20包括至少两节箱形臂节 30, 前 一节箱形臂节 30插入后一节箱形臂节 30的空腔中, 从而使得作业时箱形 臂架 20能够伸缩。 为了实现箱形臂架 20的伸缩, 可以在箱形臂节 30的内 部设置滑轮机构, 也可以在箱形臂节 30的外部设置油缸。
在本发明中, 前一节箱形臂节 30的侧壁 31 的外表面可以直接与后一 节箱形臂节 30的侧壁的内表面接触。 为了减小相邻两节箱形臂节 30在相 对滑动时的摩擦力, 如图 7至图 10中所示, 可以将前一节箱形臂节 30支 撑在后一节箱形臂节 30内部。 如图中所示, 前一节箱形臂节 30的多个侧 壁 31的外表面与后一节箱形臂节 30的多个侧壁 31的内表面之间形成有间 隙 31a,前一节箱形臂节 30的侧壁 31的后端部的外表面上设置有后支撑板 35,后一节箱形臂节 30的侧壁 31的前端部的内表面上设置有前支撑板 33, 后一节箱形臂节 30上的前支撑板 33和前一节臂节 30上的后支撑板 35设 置在间隙 31a之中, 以将前一节箱形臂节 30支撑在后一节箱形臂节 30中。
在箱形臂架 20伸缩时, 前支撑板 33和后支撑板 35减小了前一节箱形 臂节 30和后一节箱形臂节 30之间的接触面积, 从而减小了减小相邻两节 箱形臂节 30在相对滑动时的摩擦力。 此外, 前支撑板 33和后支撑板 35的 另一个作用还在于, 可以引导箱形臂架 20的伸缩。
在本发明中, 对前支撑板 33和后支撑板 35的数量以及设置位置并没 有特殊要求, 只要前支撑板 33和后支撑板 35能够将前一节箱形臂节 30支 撑在后一节箱形臂节 30中即可。
在本发明中, 可以利用焊接等方式将前支撑板 33和后支撑板 35分别 固定在后一节箱形臂节 30的侧壁 31上和前一节箱形臂节 30的侧壁 31上。 当侧壁 31较薄时, 优选地, 利用紧固件 (如, 螺钉) 将前支撑板 33和后 支撑板 35分别固定在一节箱形臂节 30的侧壁 31上和前一节箱形臂节 30 的侧壁 31上。
由于箱形臂节 30的横截面为正多边形, 因此, 前一节箱形臂节 30的 侧壁 31的外表面与后一节箱形臂节 30的侧壁 31的内表面之间的间隙 31 可以划分为多个部分。 间隙 31a的多个部分与箱形臂节 30的多个侧壁 31 一一对应。 例如, 图 8中所示的箱形臂节 30的横截面为正方形, 因此, 相 邻两节箱形臂节 30之间的间隙 31a被划分为四个部分。 为了便于将多节箱 形臂节 30组装在一起, 后一节箱形臂节 30上的前支撑板 33和前一节箱形 臂节 30上的后支撑板 35分别设置在相邻两节箱形臂节 30之间的间隙 31a 的不同部分中。 如此, 组装多节箱形臂节 30时, 前支撑板 33和后支撑板 35之间不会产生干涉。
在箱形臂架 20中, 前一节箱形臂节 30的横截面积小于后一节箱形臂 节 30的横截面积。 为了便于将多节箱形臂节 30组装在一起, 并便于箱形 臂架 20的伸缩, 优选地, 前支撑板 33和后支撑板 35的高度小于前一节箱 形臂节 30与后一节箱形臂节 30的高度差的二分之一。 例如, 前支撑板 33 和后支撑板 35的高度可以比前一节箱形臂节 30和后一节箱形臂节 30的高 度差的二分之一小 0.5mm至 2mm, 从而保证箱形臂架 20伸缩自如。
为了进一步防止当箱形臂架 20伸长到最大行程时前一节箱形臂节 30 从后一节箱形臂节 30中脱出, 优选地, 前一节箱形臂节 30的侧壁 31的后 端部的外表面上还设置有后挡块 34, 该后挡块 34位于后支撑板 35前方, 后一节箱形臂节 30的侧壁 31的前端部的内表面上设置有前挡块 32, 该前 挡块 32位于前支撑板 33的后方, 后挡块 34位于前挡块 32后方, 且设置 有后挡块 34的侧壁 31与设置有前挡块 32的侧壁 31相对, 以使得在箱形 臂架 20伸长时, 前挡块 32能够与后挡块 34相撞。
为了便于理解, 下面将对上文中出现的 "高度"进行解释。 以前支撑 板 33为例, 前支撑板 33上与箱形臂节 30的内表面相接触的表面为第一表 面, 前支撑板 33上与该第一表面相对的表面为第二表面, 前支撑板 33的 高度是指所述第一表面与所述第二表面之间的距离。 后支撑板 35的高度方 向、 前挡块 32的高度方向以及后挡块 34的高度方向与前支撑板 33的高度 方向一致, 这里不再赘述。
在本发明中, 对前挡块 32和后挡块 34的具体位置并没有特殊要求, 只要前挡块 32和后挡块 34能够在箱形臂架 20伸长到最大行程时相撞, 以 防止前一节箱形臂节 30和后一节箱形臂节 30中脱出即可。
为了更可靠地防止前一节箱形臂节 30和后一节箱形臂节 30中脱出, 优选地, 当前一节箱形臂节 30上的后挡块 34与后一节箱形臂节 30上的前 挡块 32相撞时,后挡块 34上朝向前挡块 32的表面的 80%至 99%与前挡块 32上朝向后挡块 34的表面重合。在本发明中, 前挡块 32和后挡块 34可以 具有完全相同的形状, 因此, 前挡块 32的侧面可以与后挡块 34的侧面对 齐, 从而可以保证在后一节箱形臂节 30上的前挡块 32和前一节箱形臂节 30上的后挡块 34相撞时,前挡块 32后端面与后挡块 34的前端面具有较大 的重合面积。
为了缓冲前一节箱形臂节 30上的后挡块 34与后一节箱形臂节 30上的 前挡块 32相撞时的冲击, 优选地, 前挡块 32与后挡块 34均为由具有弹性 的材料制成的块状体。 例如, 前挡块 32和后挡块 34由橡胶材料制成。 所 述的 "块状体"可以是长方体、 正方体、 圆柱体等。
在本发明中, 可以通过多种方式控制箱形臂架 20的伸缩。 例如, 可以 在箱形臂节 30上设置滑轮, 利用滑轮控制箱形臂架 20的伸缩, 又或者, 可以在箱形臂架 20上设置伸缩油缸, 通过控制油缸的伸缩来控制箱形臂架 20的伸缩。 优选地, 如图 4所示, 为了简化箱形臂节 30的结构, 箱形臂架 20还可以包括多级伸缩油缸 40, 该多级伸缩油缸 40可以通过设置在箱形 臂节 30的前加强板上的油缸安装座 40a安装在箱形臂节 30的外表面上。
作为本发明的再一个方面, 还提供一种混凝土喷射机, 如图 4所示, 该混凝土喷射机包括回转台 10和与该回转台 10铰接的箱形臂架 20, 回转 台 10的中心轴线 L为水平方向, 并且回转台 10能够带动箱形臂架 20绕中 心轴线 L转动, 其中, 箱形臂架 20为本发明所提供的上述箱形臂架。
在本发明中, 无论回转台旋转至何种角度, 箱形臂架的横截面惯性积 变化都不大, 因此内应力变化也不大, 从而不容易因内应力变化而损坏。
以上结合附图详细描述了本发明的优选实施方式, 但是, 本发明并不 限于上述实施方式中的具体细节, 在本发明的技术构思范围内, 可以对本 发明的技术方案进行多种简单变型, 这些简单变型均属于本发明的保护范 围。
另外需要说明的是, 在上述具体实施方式中所描述的各个具体技术特 征, 在不矛盾的情况下, 可以通过任何合适的方式进行组合。 为了避免不 必要的重复, 本发明对各种可能的组合方式不再另行说明。
此外, 本发明的各种不同的实施方式之间也可以进行任意组合, 只要 其不违背本发明的思想, 其同样应当视为本发明所公开的内容。

Claims

权利要求
1、一种混凝土喷射机的箱形臂节,该箱形臂节具有至少四个侧壁(31 ), 其特征在于, 所述箱形臂节的横截面为正多边形。
2、 根据权利要求 1所述的箱形臂节, 其特征在于, 该箱形臂节具有四 个侧壁 (31 ), 所述箱形臂节的横截面为正方形。
3、 根据权利要求 2所述的箱形臂节, 其特征在于, 所述正方形的四个 角部形成有倒角。
4、 根据权利要求 1至 3中任意一项所述的箱形臂节, 其特征在于, 该 箱形臂节的前端设置有前加强板(36),和 /或所述箱形臂节的后端设置后加 强板 (37)。
5、 根据权利要求 4所述的箱形臂节, 其特征在于, 该箱形臂节的前端 设置有前加强板 (36), 所述前加强板 (36) 包覆在所述箱形臂节的外表面 上, 所述前加强板 (36) 上设置有油缸安装座 (40a)。
6、 一种混凝土喷射机的箱形臂架, 该箱形臂架与回转台 (10) 铰接, 该回转台的中心轴线 (L) 为水平方向, 并且所述回转台 (10) 能够带动所 述箱形臂架绕所述中心轴线 (L)转动, 所述箱形臂节包括至少一节箱形臂 节 (30), 其特征在于, 该箱形臂节 (30) 为权利要求 1至 5中任意一项所 述的箱形臂节。
7、 根据权利要求 6所述的箱形臂架, 其特征在于, 所述箱形臂架包括 至少两节所述箱形臂节 (30), 前一节所述箱形臂节 (30)插入后一节所述 箱形臂节 (30) 的空腔中。
8、 根据权利要求 7所述的箱形臂架, 其特征在于, 前一节所述箱形臂 节 (30) 的多个所述侧壁 (31 ) 的外表面与后一节所述箱形臂节 (30) 的 所述多个侧壁 (31 ) 的内表面之间形成有间隙 (31a), 前一节所述箱形臂 节 (30) 的所述侧壁 (31 ) 的后端部的外表面上设置有后支撑板 (35), 后 一节所述箱形臂节 (30) 的所述侧壁 (31 ) 的前端部的内表面上设置有前 支撑板(33),该前支撑板(33 )和所述后支撑板(35 )设置在所述间隙(31a) 之中, 以将所述前一节箱形臂节 (30) 支撑在所述后一节箱形臂节 (30) 中。
9、 根据权利要求 8所述的箱形臂架, 其特征在于, 相邻两节所述箱形 臂节 (30) 之间的所述间隙 (31a) 包括与所述箱形臂节 (30) 的所述多个 侧壁 (31 ) —一对应的多个部分, 后一节所述箱形臂节 (30) 上的所述前 支撑板 (33 ) 和前一节所述箱形臂节 (30) 上的所述后支撑板 (35 ) 分别 设置在相邻两节所述箱形臂节之间的所述间隙 (31a) 的不同部分中。
10、 根据权利要求 8或 9所述的箱形臂架, 其特征在于, 所述前支撑 板(34)的高度和所述后支撑板(35 )的高度均比所述前一节箱形臂节(30) 与后一节所述箱形臂节 (30) 的高度之差小 0.5mm至 2mm。
11、 根据权利要求 8所述的箱形臂架, 其特征在于, 前一节所述箱形 臂节 (30) 的所述侧壁 (31 ) 的后端部的外表面上还设置有后挡块 (34), 该后挡块 (34) 位于所述后支撑板 (35 ) 前方, 后一节所述箱形臂节的所 述侧壁 (31 ) 的前端部的内表面上设置有前挡块 (32), 该前挡块 (32) 位 于所述前支撑板 (33 ) 的后方, 所述后挡块 (34) 位于所述前挡块 (32) 后方, 且设置有所述后挡块 (34) 的所述侧壁 (31 ) 与设置有所述前挡块 ( 32) 的所述侧壁 (31 ) 相对, 以使得在所述箱形臂架伸长时, 所述前挡 块 (32) 能够与所述后挡块 (34) 相撞。
12、 根据权利要求 11所述的箱形臂架, 其特征在于, 当前一节所述箱 形臂节 (30) 上的所述后挡块 (34) 与后一节所述箱形臂节 (30) 上的所 述前挡块 (32) 相撞时, 所述后挡块 (34) 上朝向所述前挡块 (32) 的表 面的 80%至 99%与所述前挡块(32)上朝向所述后挡块(34) 的表面重合。
13、 根据权利要求 11或 12所述的箱形臂架, 其特征在于, 所述前挡 块 (32) 与所述后挡块 (34) 均为由具有弹性的材料制成的块状体。
14、 根据权利要求 7所述的箱形臂架, 其特征在于, 该箱形臂架还包 括多级伸缩油缸 (40), 该多级伸缩油缸 (40) 通过所述油缸安装座 (40a) 安装在多节所述箱形臂节 (30) 的外表面上。
15、 一种混凝土喷射机, 该混凝土喷射机包括回转台 (10) 和与该回 转台 (10) 铰接的箱形臂架 (20), 所述回转台 (10) 的中心轴线 (L) 为 水平方向, 并且所述回转台 (10) 能够带动所述箱形臂架 (20) 绕所述中 心轴线 (L) 转动, 其特征在于, 所述箱形臂架 (20) 为权利要求 6至 14 中任意一项所述的箱形臂架。
PCT/CN2012/086105 2012-08-08 2012-12-07 混凝土喷射机的箱形臂节、箱形臂架和混凝土喷射机 WO2014023074A1 (zh)

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