WO2012071881A1 - 混凝土搅拌车及其搅拌筒 - Google Patents

混凝土搅拌车及其搅拌筒 Download PDF

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Publication number
WO2012071881A1
WO2012071881A1 PCT/CN2011/075926 CN2011075926W WO2012071881A1 WO 2012071881 A1 WO2012071881 A1 WO 2012071881A1 CN 2011075926 W CN2011075926 W CN 2011075926W WO 2012071881 A1 WO2012071881 A1 WO 2012071881A1
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WO
WIPO (PCT)
Prior art keywords
mixing drum
blade
concrete mixer
mixer truck
hole
Prior art date
Application number
PCT/CN2011/075926
Other languages
English (en)
French (fr)
Inventor
刘柱
李献杰
李作浩
Original Assignee
湖南三一智能控制设备有限公司
三一重工股份有限公司
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Publication date
Application filed by 湖南三一智能控制设备有限公司, 三一重工股份有限公司 filed Critical 湖南三一智能控制设备有限公司
Publication of WO2012071881A1 publication Critical patent/WO2012071881A1/zh

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
    • B28C5/42—Apparatus specially adapted for being mounted on vehicles with provision for mixing during transport
    • B28C5/4203—Details; Accessories
    • B28C5/4268—Drums, e.g. provided with non-rotary mixing blades
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F29/00—Mixers with rotating receptacles
    • B01F29/60—Mixers with rotating receptacles rotating about a horizontal or inclined axis, e.g. drum mixers
    • B01F29/63—Mixers with rotating receptacles rotating about a horizontal or inclined axis, e.g. drum mixers with fixed bars, i.e. stationary, or fixed on the receptacle

Definitions

  • the invention relates to the technical field of engineering machinery, in particular to a mixing drum.
  • the invention also relates to a concrete mixer truck comprising the above-described mixing drum.
  • the mixing drum is a key component of concrete mixer trucks, and its working performance directly affects concrete mixing.
  • the working performance of the equipment is a key component of concrete mixer trucks, and its working performance directly affects concrete mixing. The working performance of the equipment.
  • FIG. 1 is a schematic structural view of a typical mixing drum in the prior art.
  • the mixing drum includes a mixing drum housing 11 on which a stirring blade 12 is welded, one end of the mixing cylinder housing is fixed with a connecting flange 13 and the other end is provided with an opening, and the connecting flange 13 passes through the gearbox and the engine. Output shaft connection.
  • the pre-mixed concrete at the mixing station needs to be poured into the mixing drum.
  • the engine is started, and the kinetic energy is transmitted to the connecting flange 13 after the gearbox is decelerated, and the connecting flange 13 drives the mixing drum housing 11 Rotating in the forward direction, which in turn drives the stirring blade 12 to rotate forward, so that the pre-mixed concrete enters the mixing drum and further stirs; after the concrete mixer truck travels to the destination, the gearbox drives the connecting flange 13 and the mixing cylinder shell
  • the body 11 and the agitating blades 12 are rotated in the reverse direction, thereby rotating the agitated concrete out of the mixing drum to complete the agitation and transportation of the concrete.
  • the object of the present invention is to provide a mixing drum of a concrete mixer truck, wherein the stirring blade of the mixing drum and the mixing drum housing are detachably connected, thereby reducing the difficulty and complexity of the stirring blade replacement on the basis of ensuring the stirring function.
  • Another object of the present invention is to provide a concrete mixer truck comprising the above-described mixing drum.
  • the present invention provides a mixing drum of a concrete mixer truck, comprising a mixing drum housing and a stirring blade, and further comprising a connecting bracket and a connecting member, wherein the connecting bracket is fixed to the mixing drum housing.
  • a first through hole is defined in the connecting seat
  • a second through hole is defined in the stirring blade
  • the connecting member is detachably inserted through the first through hole and the second through hole The connection support and the stirring blade are connected.
  • the cross section of the connecting support perpendicular to the axis of the mixing drum housing is a right angle trapezoid, and the first right angle side of the right angle trapezoid is in contact with the inner side wall of the mixing drum housing, and the second right angle side thereof It is in contact with the side wall of the stirring blade.
  • the length of the first right angle side ranges from 50 mm to 80 mm.
  • the second right angle side has a length ranging from 100 mm to 150 mm.
  • the connecting support comprises a baffle and a platform body, the first through hole is located on the platform body, and the baffle and the stirring blade are respectively located on opposite sides of the platform body.
  • the number of the baffles is two, and are respectively located at two sides of the first through hole.
  • the number of the first through hole and the second through hole is plural.
  • the connecting member is a connecting bolt or a spring pin.
  • the agitating blade comprises a front cone spiral blade, a rear cone spiral blade and a medium circular blade, and a front end of the front conical spiral blade and a helix angle of a rear end of the rear conical spiral blade are larger than a spiral of the middle circular blade An angle, a helix angle of a rear end of the front cone spiral blade and a front end of the rear cone spiral blade is equal to a helix angle of the middle circular blade.
  • the present invention also provides a concrete mixer truck comprising a chassis and a mixing drum mounted to the chassis, the mixing drum being the mixing drum according to any one of the above.
  • the mixing drum of the concrete mixer truck provided by the invention comprises a mixing drum shell and a stirring blade, and further comprises a connecting bracket and a connecting member, wherein the connecting bracket is fixed to the inner side wall of the mixing drum shell, and the connecting bracket is opened a through hole, a second through hole is formed in the stirring blade, and the connecting member is detachably connected to the connecting support and the stirring blade through the first through hole and the second through hole.
  • the agitating blade when the agitating blade is worn to a limit and needs to be replaced, the agitating blade can be removed only by disassembling the connecting member, and then the new agitating blade is connected to the inner side wall of the mixing cylinder housing through the connecting member.
  • the connection support can be.
  • the connecting bracket of the mixing drum of the concrete mixer truck provided by the present invention has a cross section perpendicular to the axis of the mixing drum housing, and has a right angle trapezoid, a first right angle side of the right angle trapezoid and a mixing cylinder shell.
  • the inner side wall of the body is in contact with the second right angle side of the body being in contact with the side wall of the stirring blade.
  • the connecting support with the trapezoidal structure not only ensures the long length of the first right angle side and the second right angle side, but also has a large contact area with the mixing drum shell and the stirring blade, ensures the reliability of the connection, and has a small weight. Preventing the increase in the working resistance of the mixing drum and the increase in fuel consumption due to the increase in the weight of the mixing drum due to the setting of the connecting support.
  • the baffle is arranged to cover the platform body of the connecting support after the first mixing of the mixing drum, so as to cover the connecting piece passing through the first through hole and the second through hole, avoiding the stirring process
  • the continuous movement of the concrete causes wear on the connecting piece, which improves the working environment of the connecting piece and prolongs the service life of the connecting piece.
  • FIG. 1 is a schematic structural view of a typical mixing drum in the prior art
  • FIG. 2 is a perspective view of a mixing drum provided by an embodiment of the present invention
  • Figure 3 is an enlarged schematic view of a portion A shown in Figure 2;
  • Figure 4 is a side view of the mixing drum shown in Figure 2;
  • Figure 5 is a front elevational view of the mixing blade of the mixing drum of Figure 2;
  • Figure 6 is a side view of the stirring blade of the mixing drum shown in Figure 2.
  • the core of the invention is to provide a mixing drum of a concrete mixer truck, the stirring blade of the mixing drum and the mixing drum shell are detachably connected, thereby reducing the difficulty and complexity of the stirring blade replacement on the basis of ensuring the stirring function.
  • Another core of the present invention is to provide a concrete mixer truck including the above-described agitating cylinder.
  • FIG. 2 is a perspective view of a mixing drum according to an embodiment of the present invention
  • FIG. 4 is a side view of the mixing drum shown in FIG.
  • the seat 23 is fixed to the inner side wall of the mixing drum housing 31,
  • the connecting bracket 22 is provided with a first through hole 233,
  • the stirring blade 22 is provided with a second through hole, and the connecting member passes through the first through hole 233 and the second through hole.
  • the hole detachably connects the above-described connection holder 23 and the agitating blade 22.
  • the connecting member may be a connecting bolt or a spring pin.
  • the kinetic energy of the engine is transmitted to the connecting flange through the transmission, and then transmitted to the mixing drum housing 21, and the mixing drum housing 21 rotates and is transmitted to the through through hole 233 through the connecting bracket fixedly connected thereto.
  • the connecting member is transmitted through the connecting member to the stirring blade 22 which is provided with the second through hole, the stirring blade 22 rotates with the mixing drum housing 21, stirs the concrete in the mixing drum, or rotates the finished concrete of the foot plate out of the mixing drum .
  • the mixing drum provided by the present invention is provided with the connecting bracket 23 and the connecting member.
  • the stirring blade 22 can be removed only by disassembling the connecting member.
  • the new agitating blade 22 is connected to the connecting abutment 23 fixed to the inner side wall of the mixing drum housing through a connecting member.
  • the mixing drum provided by the invention is detachably connected by the connecting piece by the stirring blade and the mixing drum housing, which not only ensures the need of mixing the concrete, but also can conveniently be used when the stirring blade is required to be replaced. Replacement reduces the difficulty and complexity of mixing blade replacement, saving time and cost of replacement.
  • the connecting bracket 23 may be fixed to the inner side wall of the mixing drum housing 21 by welding, or may be fixed to the inner side wall of the mixing drum housing 21 by other means, such as riveting, bolting or the like. Fixed method, not subject to the limitations of this article.
  • FIG. 3 is an enlarged schematic view of the portion A shown in FIG. 2, which is an enlarged schematic view of the portion A shown in FIG.
  • the cross section of the connecting bracket 23 of the mixing drum of the concrete mixer truck provided by the present invention perpendicular to the axis of the mixing drum housing may be a right-angled trapezoid, the first right-angled side of the right-angled trapezoid and the mixing cylinder shell.
  • the inner side wall of the body 21 is in contact with its second right-angled side in contact with the side wall of the stirring blade 22.
  • the connecting support 23 having a trapezoidal structure not only ensures that the lengths of the first right angle side and the second right angle side are long, and the contact area with the mixing drum housing 21 and the stirring blade 22 is large, ensuring the reliability of the connection, and the weight. Smaller, it prevents the increase of the working resistance of the mixing drum and the increase of fuel consumption due to the increase of the weight of the mixing drum due to the arrangement of the connecting support 23.
  • connection support 23 can also have other shapes, as long as the functional requirements can be achieved.
  • the length of the first right-angled side of the connection holder 23 is generally in the range of 50 mm to 80 mm, and the length of the second right-angled side is generally in the range of 100 mm to 150 mm.
  • the connecting bracket 23 of the mixing drum of the concrete mixer truck provided by the present invention may include a baffle 231 and a platform body 232, and the first through hole 233 is located on the platform body 232.
  • the baffle 231 and the agitating blades 22 are respectively located on opposite sides of the platform body 232.
  • the baffle 231 is disposed such that the concrete covers the platform body 232 of the connection support 23 after the first agitation of the mixing drum, thereby covering the connecting member passing through the first through hole 233 and the second through hole, thereby avoiding During the mixing process, the continuous movement of the concrete causes wear on the connecting member, improves the working environment of the connecting member, and prolongs the service life of the connecting member.
  • the number of the baffles 231 may be two, and They are respectively located on both sides of the first through hole 232.
  • connection support 23 in order to improve the connection rigidity of the connection support 23 and the stirring blade 22, a plurality of first through holes 233 may be formed in the connection support 23, and the number of the second through holes on the stirring blade 22 is correspondingly also For multiple.
  • the plurality of first through holes 233 may be sequentially arranged along the width direction of the stirring blade 22, and the respective second through holes are disposed in a manner corresponding to the first through holes 233 to facilitate the connection of the connecting members.
  • the second through hole may be a connecting hole connecting the stirring blade segments of each section, and when connecting, the connecting member simultaneously passes through the connecting hole of the two stirring blade segments and the first through hole 233 opened in the connecting support 23,
  • the connecting member not only functions to connect the stirring blade 22 and the connecting support 23, but also functions to connect the two sections of the stirring blade to reduce the number of parts.
  • FIG. 5 is a front view of the stirring blade of the mixing drum shown in FIG. 2;
  • FIG. 6 is a side view of the stirring blade of the mixing drum shown in FIG.
  • the installation method of the stirring blade 22 directly affects the stirring performance and the discharging performance of the mixing drum, and the helix angle of the spiral of the stirring blade 22 is closely related to the stirring performance and the discharging performance of the mixing drum, therefore, how to set
  • the helix angle of the helix of the agitating blade is particularly important; the larger the helix angle, the worse the agitation performance, and the better the discharge performance, the front end of the front cone spiral blade of the agitating blade of the concrete mixer provided by the present invention
  • the rear end of the rear cone spiral blade adopts a larger helix angle and is larger than the helix angle of the middle circle blade to improve the discharge performance, and the helix angle of the front end of the front cone spiral blade and the front end of the rear cone spiral blade is equal to the middle circle.
  • the spiral angle of the blade is used to improve the stirring performance on the basis of convenient fitting. It can be seen that the spiral of the stirring blade of the concrete mixer truck provided by the invention is a non-equal angle spiral, thereby ensuring the stirring performance and ensuring Discharge performance.
  • the present invention also provides a concrete mixer truck comprising a chassis and a mixing drum mounted on the chassis.
  • the mixing drum is the above-mentioned mixing drum.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)

Description

混凝土搅拌车及其搅拌筒 本申请要求于 2010 年 12 月 1 日提交中国专利局、 申请号为 201020636523.2、 名称为 "混凝土搅拌车及其搅拌筒"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
本发明涉及工程机械技术领域， 特别涉及一种搅拌筒。 本发明还涉及 一种包括上述搅拌筒的混凝土搅拌车。
背景技术
随着商品混凝土在我国大中城市的推广和普及， 作为实现混凝土生产 商品化的重要设备， 混凝土搅拌设备得到了迅速发展， 搅拌筒作为混凝土 搅拌车的关键部件， 其工作性能直接影响着混凝土搅拌设备的工作性能。
请参考图 1 , 图 1为现有技术中一种典型的搅拌筒的结构示意图。 搅拌筒包括搅拌筒壳体 11 , 搅拌筒壳体 11上焊接有搅拌叶片 12, 搅 拌筒壳体的一端固定有连接法兰 13, 另一端设置有开口， 连接法兰 13通 过变速箱与发动机的输出轴连接。
工作过程中， 需要将在搅拌站经过预搅拌的混凝土倒入搅拌筒中， 为 此， 发动机启动， 其动能经过变速箱降速后传递至连接法兰 13, 连接法兰 13带动搅拌筒壳体 11正向旋转， 进而带动搅拌叶片 12正向旋转， 使经过 预搅拌的混凝土进入搅拌筒内， 并进一步进行搅拌； 当混凝土搅拌车行驶 至目的地以后， 变速箱带动连接法兰 13、 搅拌筒壳体 11和搅拌叶片 12反 向旋转，从而将搅拌充分的混凝土旋出搅拌筒， 完成混凝土的搅拌和运输。
由上述工作过程可以看出，经过预搅拌的混凝土在搅拌叶片 12的作用 下完成进一步的搅拌，组成混凝土的各种物料对搅拌叶片 12的磨损作用 ^艮 大， 这就造成了搅拌叶片 12比较容易损坏， 经常需要更换。
然而，现有技术中的搅拌叶片 12都是通过焊接方式固定到搅拌筒壳体 11 的内侧壁上， 一旦搅拌叶片 12磨损到限需要更换时， 需要首先将搅拌 叶片 12切割下来， 然后将新的搅拌叶片 12焊接上， 更换过程费时费力。 因此， 如何降低搅拌叶片更换过程的复杂度， 就成为本领域技术人员 目前需要解决的技术问题。 发明内容
本发明的目的是提供一种混凝土搅拌车的搅拌筒， 该搅拌筒的搅拌叶 片和搅拌筒壳体可拆卸地连接， 从而在保证搅拌功能的基础上， 降低了搅 拌叶片更换的难度和复杂度。 本发明的另一目的是提供一种包括上述搅拌 筒的混凝土搅拌车。
为解决上述技术问题， 本发明提供一种混凝土搅拌车的搅拌筒， 包括 搅拌筒壳体和搅拌叶片， 还包括连接支座和连接件， 所述连接支座固定于 所述搅拌筒壳体的内侧壁， 所述连接支座上开设有第一通孔， 所述搅拌叶 片上开设有第二通孔， 所述连接件穿过所述第一通孔和所述第二通孔可拆 卸地连接所述连接支座和所述搅拌叶片。
优选地， 所述连接支座垂直于所述搅拌筒壳体轴线的方向的横截面为 直角梯形， 所述直角梯形的第一直角边与搅拌筒壳体的内侧壁接触， 其第 二直角边与所述搅拌叶片的侧壁接触。
优选地， 所述第一直角边的长度范围为 50mm至 80mm。
优选地， 所述第二直角边的长度范围为 100mm至 150mm。
优选地， 所述连接支座包括挡板和平台体， 所述第一通孔位于所述平 台体上， 所述挡板和所述搅拌叶片分别位于所述平台体的相对的两侧。
优选地， 所述挡板的数目为两个， 且分别位于所述第一通孔的两侧。 优选地， 所述第一通孔和所述第二通孔的数目均为多个。
优选地， 所述连接件为连接螺栓或者弹簧销。
优选地，所述搅拌叶片包括前锥螺旋叶片、后锥螺旋叶片和中圓叶片， 所述前锥螺旋叶片的前端和所述后锥螺旋叶片的后端的螺旋角大于所述中 圓叶片的螺旋角， 所述前锥螺旋叶片的后端和所述后锥螺旋叶片的前端的 螺旋角等于所述中圓叶片的螺旋角。
为解决上述技术问题， 本发明还提供一种混凝土搅拌车， 包括底盘和 安装于所述底盘的搅拌筒， 所述搅拌筒为上述任一项所述的搅拌筒。 本发明所提供的混凝土搅拌车的搅拌筒，包括搅拌筒壳体和搅拌叶片， 还包括连接支座和连接件， 连接支座固定于搅拌筒壳体的内侧壁， 连接支 座上开设有第一通孔， 搅拌叶片上开设有第二通孔， 连接件穿过第一通孔 和第二通孔可拆卸地连接上述连接支座和搅拌叶片。 这样， 当搅拌叶片磨 损到限， 需要进行更换时， 只需要将连接件拆开， 就可以将搅拌叶片拆下， 然后将新的搅拌叶片通过连接件连接到固定于搅拌筒壳体的内侧壁的连接 支座即可。 可以看出， 本发明所提供的搅拌筒， 由于搅拌叶片和搅拌筒壳 体通过连接件可拆卸的连接， 不仅保证了搅拌混凝土的需要， 而且可以在 需要进行搅拌叶片的更换时， 很方便地进行更换， 降低了搅拌叶片更换的 难度和复杂度， 节省了更换的时间和成本。
在一种优选实施方式中， 本发明所提供的混凝土搅拌车的搅拌筒的连 接支座垂直于搅拌筒壳体轴线的方向的横截面为直角梯形， 直角梯形的第 一直角边与搅拌筒壳体的内侧壁接触， 其第二直角边与搅拌叶片的侧壁接 触。 具有梯形结构的连接支座， 不仅保证了第一直角边和第二直角边的长 度较长， 与搅拌筒壳体和搅拌叶片的接触面积较大， 保证连接的可靠性， 而且重量较小， 防止由于连接支座的设置增加搅拌筒的重量， 造成的搅拌 筒工作阻力的增大和燃油消耗量的增加。
在另一种优选实施方式中， 本发明所提供的混凝土搅拌车的搅拌筒的 连接支座包括挡板和平台体， 第一通孔位于平台体上， 挡板和搅拌叶片分 别位于平台体的相对的两侧。 挡板的设置可以使混凝土在搅拌筒完成第一 次搅拌后， 覆盖住连接支座的平台体， 从而覆盖住穿过第一通孔和第二通 孔的连接件， 避免了在搅拌过程中， 混凝土的不断运动对连接件造成的磨 损， 改善了连接件的工作环境延长了连接件的使用寿命。
本发明所提供的混凝土搅拌车的有益效果与搅拌筒的有益效果类似， 在此不再赘述。
附图说明
图 1为现有技术中一种典型的搅拌筒的结构示意图；
图 2为本发明一种具体实施方式所提供的搅拌筒的轴测图； 图 3为图 2所示 A部分的放大示意图；
图 4为图 2所示搅拌筒的侧视图；
图 5为图 2所示搅拌筒的搅拌叶片的主视图;
图 6为图 2所示搅拌筒的搅拌叶片的侧视图。
具体实施方式
本发明的核心是提供一种混凝土搅拌车的搅拌筒， 该搅拌筒的搅拌叶 片和搅拌筒壳体可拆卸地连接， 从而在保证搅拌功能的基础上， 降低了搅 拌叶片更换的难度和复杂度。 本发明的另一核心是提供一种包括上述搅拌 筒的混凝土搅拌车。
为了使本领域的技术人员更好地理解本发明的技术方案， 下面结合附 图和具体实施例对本发明作进一步的详细说明。
请参考图 2和图 4, 图 2为本发明一种具体实施方式所提供的搅拌筒 的轴测图； 图 4为图 2所示搅拌筒的侧视图。
如图中所示， 本发明所提供的混凝土搅拌车的搅拌筒， 包括搅拌筒壳 体 21和搅拌叶片 22, 还包括连接支座 23和连接件 (图中未以标号示出）， 连接支座 23固定于搅拌筒壳体 31的内侧壁，连接支座 22上开设有第一通 孔 233 , 搅拌叶片 22上开设有第二通孔， 连接件穿过第一通孔 233和第二 通孔可拆卸地连接上述连接支座 23和搅拌叶片 22。
具体地， 上述连接件可以为连接螺栓或者弹簧销。
工作过程中， 发动机的动能经过变速箱传递至连接法兰， 进而传递至 搅拌筒壳体 21 , 搅拌筒壳体 21转动， 并通过与其固定连接的连接支座传 递至穿过第一通孔 233的连接件， 通过连接件传递至开设有第二通孔的搅 拌叶片 22, 搅拌叶片 22随着搅拌筒壳体 21旋转， 搅拌在搅拌筒内的混凝 土， 或者将脚板完成的混凝土旋出搅拌筒。
这样， 本发明所提供的搅拌筒， 由于设置了连接支座 23和连接件， 当 搅拌叶片 22磨损到限， 需要进行更换时， 只需要将连接件拆开， 就可以将 搅拌叶片 22拆下， 然后将新的搅拌叶片 22通过连接件连接到固定于搅拌 筒壳体的内侧壁的连接支座 23即可。 可以看出， 本发明所提供的搅拌筒， 由于搅拌叶片和搅拌筒壳体通过 连接件可拆卸的连接， 不仅保证了搅拌混凝土的需要， 而且可以在需要进 行搅拌叶片的更换时， 很方便地进行更换， 降低了搅拌叶片更换的难度和 复杂度， 节省了更换的时间和成本。
具体地， 连接支座 23可以通过焊接的方式固定到搅拌筒壳体 21的内 侧壁， 也可以通过其他方式， 比如： 铆接， 螺栓连接等方式固定至搅拌筒 壳体 21的内侧壁， 其具体固定方式， 不受本文的限制。
请结合图 2参考图 3 , 图 3为图 2所示 A部分的放大示意图。
如图 2 所示， 本发明所提供的混凝土搅拌车的搅拌筒的连接支座 23 垂直于搅拌筒壳体轴线的方向的横截面可以为直角梯形， 直角梯形的第一 直角边与搅拌筒壳体 21的内侧壁接触， 其第二直角边与搅拌叶片 22的侧 壁接触。
具有梯形结构的连接支座 23 , 不仅保证了第一直角边和第二直角边的 长度较长， 与搅拌筒壳体 21和搅拌叶片 22的接触面积较大， 保证连接的 可靠性， 而且重量较小， 防止由于连接支座 23的设置增加搅拌筒的重量， 造成的搅拌筒工作阻力的增大和燃油消耗量的增加。
当然， 连接支座 23也可以具有其他形状， 只要能够实现功能要求， 都 是可以的。
为了保证连接的可靠性，连接支座 23的第一直角边的长度范围一般为 50mm至 80mm, 第二直角边的长度范围一般为 100mm至 150mm。
如图 3所示， 在一种具体实施方式中， 本发明所提供的混凝土搅拌车 的搅拌筒的连接支座 23可以包括挡板 231和平台体 232, 第一通孔 233位 于平台体 232上，挡板 231和搅拌叶片 22分别位于平台体 232的相对的两 侧。
挡板 231的设置可以使混凝土在搅拌筒完成第一次搅拌后， 覆盖住连 接支座 23的平台体 232,从而覆盖住穿过第一通孔 233和第二通孔的连接 件， 避免了在搅拌过程中， 混凝土的不断运动对连接件造成的磨损， 改善 了连接件的工作环境， 延长了连接件的使用寿命。
为了进一步提高混凝土的覆盖效果， 挡板 231的数目可以为两个， 且 分别位于第一通孔 232的两侧。
另一方面， 为了提高连接支座 23与搅拌叶片 22的连接牢固性， 还可 以在连接支座 23上开设多个第一通孔 233 , 相应地搅拌叶片 22上的第二 通孔的数目也为多个。
多个第一通孔 233可以沿着搅拌叶片 22的宽度方向依次排列设置，各 个第二通孔的设置方式与第一通孔 233相对应， 以方便连接件的连接。
进一步地， 第二通孔可以为各节搅拌叶片段连接的连接孔，在连接时， 连接件同时穿过两节搅拌叶片段的连接孔和开设于连接支座 23 的第一通 孔 233 , 连接件不仅起到连接搅拌叶片 22和连接支座 23的作用， 而且起 到连接两段搅拌叶片段的作用， 减少零件数目。
请参考图 5和图 6, 图 5为图 2所示搅拌筒的搅拌叶片的主视图； 图 6 为图 2所示搅拌筒的搅拌叶片的侧视图。
众所周知，搅拌叶片 22的安装方式直接影响着搅拌筒的搅拌性能和出 料性能，而搅拌叶片 22的螺旋线的螺旋角与搅拌筒的搅拌性能和出料性能 有着密切的关系， 因此， 如何设置搅拌叶片的螺旋线的螺旋角就显得特别 地重要； 由于螺旋角越大搅拌性能越差， 而出料性能越好， 本发明所提供 的混凝土搅拌车的搅拌叶片的前锥螺旋叶片的前端和后锥螺旋叶片的后端 采用较大的螺旋角， 且大于中圓叶片的螺旋角， 以提高出料性能， 而前锥 螺旋叶片的后端和后锥螺旋叶片的前端的螺旋角等于中圓叶片的螺旋角， 以在方便拟合的基础上， 提高搅拌性能， 可见本发明所提供的混凝土搅拌 车的搅拌叶片的螺旋线为非等角螺旋线， 从而既可以保证搅拌性能， 又可 以保证出料性能。
此外， 本发明还提供了一种混凝土搅拌车， 包括底盘和安装于所述底 盘的搅拌筒， 搅拌筒为上述的搅拌筒， 该混凝土搅拌车的其他各部分的结 构请参考现有技术， 本文不再赘述。
以上对本发明所提供的混凝土搅拌车及其搅拌筒进行了详细介绍。 本 的说明只是用于帮助理解本发明的方法及其核心思想。 应当指出， 对于本 技术领域的普通技术人员来说， 在不脱离本发明原理的前提下， 还可以对 本发明进行若干改进和修饰， 这些改进和修饰也落入本发明权利要求的保 护范围内。

Claims

权 利 要 求
1、一种混凝土搅拌车的搅拌筒，包括搅拌筒壳体 ( 21 )和搅拌叶片（22 ), 其特征在于， 还包括连接支座（23 )和连接件， 所述连接支座（23 ) 固定 于所述搅拌筒壳体（21 ) 的内侧壁， 所述连接支座（23 )上开设有第一通 孔（ 233 ), 所述搅拌叶片 （22 )上开设有第二通孔， 所述连接件穿过所述 第一通孔（ 233 )和所述第二通孔可拆卸地连接所述连接支座（ 23 )和所述 搅拌叶片 （22 )。
2、根据权利要求 1所述的混凝土搅拌车的搅拌筒， 其特征在于， 所述 连接支座（23 )垂直于所述搅拌筒壳体（21 )轴线的方向的横截面为直角 梯形， 所述直角梯形的第一直角边与搅拌筒壳体（21 ) 的内侧壁接触， 其 第二直角边与所述搅拌叶片 （22 ) 的侧壁接触。
3、根据权利要求 2所述的混凝土搅拌车的搅拌筒， 其特征在于， 所述 第一直角边的长度范围为 50mm至 80mm。
4、根据权利要求 2所述的混凝土搅拌车的搅拌筒， 其特征在于， 所述 第二直角边的长度范围为 100mm至 150mm。
5、根据权利要求 1所述的混凝土搅拌车的搅拌筒， 其特征在于， 所述 连接支座（23 ) 包括挡板（231 )和平台体（232 ), 所述第一通孔（233 ) 位于所述平台体（232 )上， 所述挡板（231 )和所述搅拌叶片 （22 )分别 位于所述平台体（232 ) 的相对的两侧。
6、根据权利要求 5所述的混凝土搅拌车的搅拌筒， 其特征在于， 所述 挡板（231 ) 的数目为两个， 且分别位于所述第一通孔（ 233 ) 的两侧。
7、根据权利要求 1至 6任一项所述的混凝土搅拌车的搅拌筒，其特征 在于， 所述第一通孔（233 )和所述第二通孔的数目均为多个。
8、根据权利要求 1至 6任一项所述的混凝土搅拌车的搅拌筒，其特征 在于， 所述连接件为连接螺栓或者弹簧销。
9、根据权利要求 1至 6任一项所述的混凝土搅拌车的搅拌筒，其特征 在于， 所述搅拌叶片 （22 )包括前锥螺旋叶片、 后锥螺旋叶片和中圓叶片， 所述前锥螺旋叶片的前端和所述后锥螺旋叶片的后端的螺旋角大于所述中 圓叶片的螺旋角， 所述前锥螺旋叶片的后端和所述后锥螺旋叶片的前端的 螺旋角等于所述中圓叶片的螺旋角。
10、 一种混凝土搅拌车， 包括底盘和安装于所述底盘的搅拌筒， 其特 征在于， 所述搅拌筒为权利要求 1至 9任一项所述的搅拌筒。
PCT/CN2011/075926 2010-12-01 2011-06-20 混凝土搅拌车及其搅拌筒 WO2012071881A1 (zh)

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