In recent years, with the increasing application of small mixer, its types and models are also increasing. Although there are some differences in the structure of different types of small mixer, from the basic principle, most of them are composed of concrete mixing device and special chassis. The following is a brief introduction to the mixing device of the small mixer, hoping to help you in the future.

搅拌筒是小型搅拌车比较重要的工作部件，绝大部分采用梨形结构

Mixing drum is an important working part of small mixer, most of which are pear shaped

搅拌筒和支撑其辅助件构成搅拌装置。

The mixing drum and the supporting auxiliary parts constitute the mixing device.

搅拌筒是小型搅拌车比较重要的工作部件，绝大部分采用梨形结构。整个搅拌筒的壳体是一个变截面不对称的双锥体，外形似梨。中部直径较大，两端对接一对不等长的截头圆锥，前段锥体较短，端面与一封头焊接在一起；后段锥体较长，端部开口。通过搅拌筒的中心轴线在前端面上安装着法兰，后段锥体上有一环形滚道，它焊接在垂直于搅拌筒轴线的平面圆周上。整个搅拌筒通过中心转轴和环形滚道，倾斜卧置在固定于副车架上的调心轴承和一对支承托轮所组成的三点支承结构上，所以搅拌筒能平稳地绕其轴线转动。搅拌筒的驱动动力来自于液压马达对中心转轴的驱动。

Mixing drum is an important working part of small mixer, most of which are pear shaped. The shell of the mixing drum is a variable cross-section asymmetric double cone, which looks like pear. The diameter of the middle part is larger, and the two ends are butted with a pair of unequal length truncated cones. The front cone is short, and the end face is welded with a head; the back cone is longer and the end is open. A flange is installed on the front end face through the central axis of the mixing drum, and there is an annular raceway on the back cone, which is welded on the plane circumference perpendicular to the axis of the mixing drum. Through the central shaft and annular raceway, the whole mixing drum is inclined and lying on the three-point supporting structure composed of the self-aligning bearing fixed on the subframe and a pair of supporting rollers, so the mixing drum can rotate smoothly around its axis. The driving power of mixing drum comes from the drive of hydraulic motor to the central shaft.

搅拌筒从筒口到筒内，沿内壁对称地焊接着2条带状的螺旋叶片，当小型混凝土搅拌车搅拌筒转动时两条螺旋叶片被带动，作围绕搅拌筒轴线的螺旋运动，这是搅拌筒对混凝土进行搅拌或卸料的基本装置。搅拌筒内还装有为提高搅拌效率的搅拌板和扩展翅。

Two ribbon spiral blades are symmetrically welded along the inner wall of the mixing drum from the mouth to the inner wall. When the mixing drum of a small concrete mixer truck rotates, the two spiral blades are driven to make a spiral movement around the axis of the mixing drum. This is the basic device for mixing or discharging concrete by the mixing drum. The mixing drum is also equipped with a mixing plate and a spreading wing to improve the mixing efficiency.

在搅拌筒筒口处，沿2条螺旋叶片内边缘焊接着一个进料小锥，它将筒口以同心圆的形式分割为内外2部分，中心部分为进料口，混凝土由此装入搅拌筒内；进料小锥与筒壁形成的环形空间为出料口，卸料时，混凝土在叶片反向螺旋运动的推力下，从此流出。

A feeding cone is welded along the inner edge of the two spiral blades at the opening of the mixing drum. It divides the cylinder mouth into two parts in the form of concentric circles, and the central part is the feeding port, so the concrete is put into the mixing drum; the annular space formed by the feeding cone and the cylinder wall is the discharge port. When discharging, the concrete flows out under the thrust of the reverse spiral movement of the blade.

当然，在小型搅拌车中，起到关键作用的组成部分不仅仅只有混凝土搅拌装置这一个部件，其他功能部件的原理和使用操作技巧也需要及时掌握，这对于保障混凝土搅拌车的平稳运行具有十分重要的意义。

Of course, in the small mixer, the key component is not only the concrete mixing device, but also the principle and operation skills of other functional components need to be mastered in time, which is of great significance for the smooth and safe operation of the concrete mixer.