The handbrake of small mixer is very important. Maintenance and inspection of handbrake are indispensable for owners, and the performance of handbrake will decline with the increase of use times. Most of the time, it is because the owner of the mixer thinks that he has put the handbrake on, but in fact, accidents occur due to the failure of the hand brake or the position of the hand brake is not in its working point, so the performance of the hand brake needs to be checked regularly.

12方搅拌车手刹系统都是作用在后轮上的。而因为后轮制动器的形式不同，手刹又有两种工作环境：在安装鼓式制动器的后轮上，由于鼓式制动器本身就可以兼作驻车制动器，因此在驻车时刹车鼓内的蹄片和摩擦片相接合，这样就可以产生制动力。而在安装碟式制动器的后轮上，由于没有刹车鼓，因此则必须在刹车碟的部位安装额外的驻车刹车鼓来使手刹完成制动工作。

The handbrake system of 12 m3 mixer truck is acting on the rear wheel. Because of the different forms of the rear wheel brake, the handbrake has two working environments: on the rear wheel with drum brake, the drum brake itself can also be used as the parking brake. Therefore, when parking, the shoe and friction plate in the brake drum are connected to generate braking force. As there is no brake drum on the rear wheel of disc brake, it is necessary to install additional parking brake drum in the center of brake disc to complete the brake work.

具体说来，那就是15方搅拌车手刹系统的内部装有棘轮和棘爪，在将手刹拉起后，棘爪就会卡在棘轮上，使手刹自动锁紧，这也就是我们在拉紧手柄时会听见“咔嗒”声响的原因。

Specifically, the ratchet wheel and pawl are installed inside the handbrake system of the 15 square mixer truck. After pulling up the hand brake, the pawl will be stuck on the ratchet wheel and the hand brake will be locked automatically. This is the reason why we will hear the "click" sound when we tighten the handle.

在手刹手柄的底部与铜缆的连接处有一个可调的补偿机构，用扳手松开锁紧螺帽，就可以拉伸刹车铜缆的长度。如果在检查中，我们发现18方搅拌车手刹的制动效能或灵敏度不理想，那可以通过调节这个手刹操作铜缆来。

There is an adjustable compensation mechanism at the connection between the bottom of the handbrake handle and the copper cable. The length of the brake copper cable can be stretched by loosening the locking nut with a wrench. If during the inspection, we find that the braking efficiency or sensitivity of the handbrake of the 18 m3 mixer is not ideal, it can be solved by adjusting the copper cable of the handbrake.