Chain and chain wheel

Abstract

The invention relates to a chain transmission mechanism, which is a chain and a chain wheel. The chain comprises a plurality of chain links and is characterized in that the chain also comprises a plurality of specific chain links, a plurality of chain links and a plurality of specific chain links are articulated in series, the structure of the specific chain links comprises a roller, both ends of the roller are sleeved with specific inner chain boards, the specific inner chain boards are positioned in the grooves of specific outer chain boards and are articulated by pin rolls, the outer end face of each specific inner chain board is provided with symmetrical inclined surfaces, the specific outer chain boards are provided with grooves, the two end surfaces of the specific outer chain boards are provided with symmetrical inclined surfaces, the chain has strong carrying capacity and smooth transmission, thus the impact of reversion of chain links suspension loads can be prevented, and the service life is long. The chain wheel is characterized in that the chain wheel comprises a wheel disc, wear layers are attached on the surfaces of a plurality of chain teeth which are fixed on the wheel disc by a position pin and a fixed bolt, the tooth surface strength of the chain wheel is high, the wear resistance is good, the chain tooth can be replaced easily, and the service life is long, therefore the chain wheel is particularly applicable to the utilization in the transmission of chain suspension loads.

Description

technical field [0001] The invention relates to a mechanical transmission mechanism, which is a chain transmission mechanism, more specifically, a chain suitable for hanging loads and a sprocket wheel for driving the chain. Background technique [0002] Existing chains are formed by connecting links of several links. The chain link is composed of a roller, an inner chain plate nested at both ends of the roller, and an outer chain plate arranged on the outside of the inner chain plate and hinged by pin shafts. The existing inner and outer chain plates are in the shape of "8", and the inner and outer chain plates can rotate around the pin shaft without restriction. The chain link moving in the forward direction is under tension, and the chain link moving in the opposite direction is under the thrust force and is in a slack state, resulting in a reversing impact on the load suspended by the chain link. Taking the existing chain pumping unit as an example, the existing chain p...

AI Technical Summary

Problems solved by technology

When the special link of the chain drives the connecting rod to make the balance box reciprocate in a straight line in the vertical direction, the polished rod at the wellhead pulled by the traction rope connected with the balance box also makes a reciprocating motion in a straight line. The plates are all in the shape of "8", and the inner and outer chain plates are unconstrained. When the special chain link of the suspended load passes through the driving sprocket to change direction, the driving sprocket makes the chain pull through the chain link behind the driving sprocket, while the front The chain link is in a relaxed state by the thrust, and the driving sprocket is continuously rotating, but the special chain link must wait for the chain link that has moved in the opposite direction to tighten before continuing to move, resulting in a reversing impact on the load suspended by the special chain link of the chain , within a certain range, the greater the degree of slack in the transmission chain, the greater the degree of reversing impact generated by the chain pumping unit, and the continuous reversing impact will lead to faster wear between the kinematic pairs. The service life of the chain pumping unit is reduced, the maintenance time is increased, the efficiency of the pumping operation is affected, and the production cost is increased

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