The friction type anti-overwinding and over-release cushioning device is designed by applying the principle scheme of friction brake system. Its advantage is that it adopts the force adjusting disk and the force adjusting screw cap to cooperate with each other, so that it can control the characteristics of its braking system (braking force) according to the specification of the corrected working pressure, and promote the adjustment of the braking force to be more appropriate. However, the specification of the friction index value varies with the raw material of the matching material and the geographic environment specification, especially when the brake system characteristics are not always maintained under the permanent posture in the specification in the medium coal mine.

And buffer connection galvanized steel wire rope, time is easy to cause corrosion, aging and other conditions, resulting in a reduction of its tensile strength. Steel strap backstop anti-over-roll over-put buffer device is the application of metal material polymer material brittle fracture for energy absorption buffer, its brake system characteristics by the geographic environment norms, time change of less harm, from the posture principle of the backstop locking tongue of the outward extension and the rollers in the rollers of the group of the relative position of the rollers is provided by the lifting container's own movement of the fitness of the mandatory In addition, friction anti-over-roll over-put buffer device for the gate crane ( Or set frame) is a single double-sided beam in terms of centralized load, bearing capacity standard deviation; Steel belt type anti-over roll over put buffer device using sleeve column as a device rack, buffer system to promote the impact force and collision steel beams based on the sleeve column dispersed to the two layers of beams of many points, thus improving the door crane (or set frame) of the bearing capacity specification, the sleeve column itself also improves the door crane (or set frame) structural tensile strength and bending stiffness, the device caused by the After the role of recovery is simple, repeatable application, without the usual maintenance.

In recent years, the friction type and the steel belt type anti-over-roll (no electricity) anti-over-roll over-put buffer device have been popularized and marketed using, professional sound, and achieved good market sales. According to the principle of the above two kinds of anti-overcoiling (no electricity) buffer device, characteristics of statistical analysis and the actual development trend, feeling: friction and steel belt buffer device can have a buffer role, taking into account the requirements of the application of the lifting system. Intelligent terminal load smaller lifting system can use friction type or steel belt type anti-overcoiling over discharge buffer device; and intelligent terminal load is very large lifting system should be the first choice to recommend the use of steel belt type anti-overcoiling over discharge buffer device.