What Is a Ratchet Wrench?

Ratchet wrench is a manual screw tightening tool, single-headed, double-headed multi-specification movable handle ratchet wrench (fixed hole). It is connected by the main plum sleeve with different specifications and sizes from the plum sleeve through the male key and the male key of the hinge key. Because a plum sleeve has two specifications of a plum-shaped through hole, it can be used for tightening two types of screws, thereby expanding the scope of use and saving raw materials and labor costs. The movable trigger can easily adjust the use angle of the wrench. This wrench is used for the tightening operation of screws, and has the characteristics of strong applicability, convenient use and low cost.

A ratchet wrench belongs to the technical field of wrench tools. The ratchet wrench includes a wrench main body, and a retaining spring, a pawl, a spring, and a ratchet are arranged in the accommodation space of the head of the wrench body, wherein the ratchet is composed of a ratchet body and a spacer, the spacer The ring is a ring with a concave ring groove on the periphery, and the spacer is sleeved on one side of the ratchet body. In the ratchet wrench, the original integral structure of the ratchet part is decomposed into a combination of a ratchet body and a spacer, thereby avoiding the processing difficulty caused by the high side and low side of the concave ring groove on the original ratchet part. Because the ratchet body and the spacer component are relatively easy to process, the production efficiency of the ratchet wrench is greatly improved, and the production cost is also reduced. ^[1]

A ratchet wrench for rotating a bolt or a nut placed in a narrow or inaccessible position. The ratchet wrench is rotatably connected to the end of the operating rod. The ratchet wrench includes a weight connected to the operation lever, and the weight can slide along the length of the operation lever. The operation lever at the front of the weight has a front weight bearing portion that blocks the collision of the weight. Alternatively, the operating lever at the rear of the weight has a rear weight bearing portion that blocks the impact of the weight. Moreover, the lever can have both a front weight bearing portion and a rear weight bearing portion ^[1]

Pneumatic rod top cover device, opening the lid of the box is more labor-saving, smooth and fast ^[1]

the difference

The ratchet sleeve wrench is connected by the main plum sleeves and slave plum sleeves of different specifications and sizes by engaging the female and male keys of the hinge key. Since a plum sleeve has two specifications of a plum-shaped through hole ^[2]

The most commonly used manual torque wrenches, in addition to electric torque wrenches , pneumatic torque wrenches , etc. ^[2] .

Structural torque wrench is also called torsion meter, torque screw driver. It is designed based on the bending principle of the beam, the bending principle of the torsion bar, and the compression principle of the helical spring. It can measure the torque acting on the nut ^[2] .

There are two types of torque wrenches: flat plate type and dial type. The torque wrench has a long elastic rod. One end is equipped with a handle and the other end is equipped with a square or hexagonal head. A replaceable sleeve is set on the square or hexagonal head and clamped with steel balls. There is also a long pointer on the top. The scale plate is fixed on the handle base, and the scale value of each division is 1N (or kg / m). Before use, first adjust the indicator mounted on the wrench to the required torque, and then pull the wrench. When the predetermined torque is reached, the pointer on the indicator will turn to the pin, and finally the pointer collides with the pin , Inform the operator through the speaker signal or sensor signal ^[2] .