Claw-free ratchet mechanism

Abstract

The invention discloses a pawl-free ratchet wheel mechanism. A gear with the same number of teeth as that of an internal gear meshes with, rotates with, separates from and returns from the internal gear to reach the purpose of rotating of the ratchet wheel. The ratchet wheel mechanism is provided with the advantage of the big torquemoment, no ratchet pawl, no forward and backward direction changeover button, no required turnover, the ratchet wheel capable of forward and backward rotating, few parts, the simple mechanism, the small gyration angle, and so on. The mechanism consists of a pair of gears (the gear and the internal gear), which are provided with the same number of teeth and which mesh together, and a spring separating the gears meshing together. The working procedure is that when the internal gear rotates radially forwards or backwards, the transient axial micro-force compresses the spring to make the internal gear and the gear mesh; the gear rotates with the internal gear; when the internal gear loses the radial force and stops rotating, the compressed spring separates the gear from the internal gear and push them to separated cavities respectively; then the inter gear can revolve with the radial force, while the gear is at rest. The above procedure is repeated to continue the work, and the gear rotates forwards or backwards intermittently.

Description

technical field [0001] The invention relates to an intermittent motion mechanism, in particular to a pawlless ratchet mechanism. Background technique [0002] Ratchet mechanisms are widely used in various industries. In order to improve work efficiency, the application of ratchet mechanism in the field of hardware tools is constantly expanding. With the rapid development of science and technology, the existing ratchet mechanism has been difficult to adapt to the progress of modern industry, agriculture and hardware tool industry. Therefore, research on high-efficiency, high-performance, and high-torque ratchet mechanisms has become an urgent problem to be solved. Therefore, there are many applications for such patents in recent years. Chinese patent: a ratchet mechanism, patent No. 02228083.9, which is disclosed in the application, and the positions of the working points of the multi-pawls are poor, so that the turning angle is small. However, its working principle is th...

AI Technical Summary

Problems solved by technology

However, its working principle is the same as the old ratchet mechanism, which is less pioneering

There are still shortcomings such as small pawls, thin ratchet teeth, and weak shaft pins. When using a slightly larger torque, it is easy to cause tooth jumping or even chipping.

As for the multiple pawls, the resistance to the ratchet spring pressure is greater. When turning, the pawls and the ratchet belt are more likely to rotate at the same time, and the ratchet mechanism will fail.

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