Two-speed winch handle operating mechanism improved Pa

 

   Yongcheng Coal Holding Company Henan Yongcheng 476600

 

   Two-speed winch is commonly used in the underground coal mining handling equipment. Commonly used models are SDJ-14, SDJ-28 two kinds. The so-called "two-speed" refers to the type of winch usually have high and low speed output speed. Winch speed by changing the internal gear reducer a manner. East China is shown in Figure l a two-speed winch manufacturers variable speed control mechanism. Shift, the operator slightly lift up the handle, the positioning pin from the locking hole on the chassis, turn the handle, turning fork withered speed drive, high speed shaft of the fork gear toggle to axially slide, respectively, and two low-cho shaft drive gear meshed, so the roll 2 to obtain the high and low output speed. Operating mechanism of the two locking holes corresponding to high and low gear.

 

    Actual production, because the device itself vibration factors, the operating mechanism from the closed positioning pin from the hole, causing the winch off suddenly blocked. , This happens, it will cause the winch suddenly stopped dragging items, or even move in the opposite direction, to the scene of operations personnel and equipment at risk, but also easy to damage the winch.

 

    After analysis, the winch operating mechanism is positioned by latching holes on the chassis locating pins constraints to achieve. The operating mechanism is by the handle positioning pin white weight naturally sink latch hole. The handle on the front of the handlebars to achieve lift and drop is mainly because the handle shaft coupling with fork at the bottom there is a certain gap, the handle can be eliminated by linking bobbing around a small angle. Seen, poured juice latching hole pair of positioning pins binding bad, it is easy detachment locking pin larvae L constraints, so that the loss of the transmission gear shift fork constraints. Lost gear constraints are susceptible to the influence of other factors slide axially from the original engagement, so the phenomenon occurs winch off the block.

 

    To eliminate this risk, it is necessary to increase the latching hole for locating pin constraints. The original is common practice to handle a new handle, the positioning pin is not in the case of a human operator does not come out from the latching hole in the detachment. The novice structure shown in Figure 2.

 

  Made of a tubular handle, the operating handle is threaded, the positioning pin mounted on the handlebar tube body, fitted with a spring, the spring has a locating pin a downward force, which the positioning pin in normal circumstances without departing from the positioning hole. To shift, the operator must pull the upper end of the lift pin ring, against the spring force from the pin to the latching hole, turning the handle to the other gear, release the lift ring, a positioning pin will be firmly limit the latching hole, and then the winch will not occur in a sudden shift operation situation.