CN101852268A - Universal maintenance-free self-adjustment ball chain - Google Patents

Abstract

The invention provides a ball chain, in particular to a universal maintenance-free self-adjustment ball chain which consists of a hemispherical body (1), a connection shaft tension bar (2), a dishing ball support (3), a chain link body (4), a steel wire retaining ring (5), a spring snap ring (6), an elastic part (7), a dust shield (8) and a ball bracket (9), wherein the hemispherical body (1) is connected with the connection shaft tension bar (2) of the ball chain into a whole by the spring snap ring (6); the spherical part of the hemispherical body (1) is in spherical fit with the dishing ball support (3) so as to form a spherical kinematic pair joint structure with the ball bracket (9) and the connection shaft tension bar (2); and the spherical kinematic pair joint transmits traction power to the ball chain body (4) through the fitting surface of the spherical kinematic pair joint and the ball chain body (4) and the steel wire retaining ring (5).

Description

Universal maintenance-free self-adjustment ball chain

Technical field

The present invention relates to the linked transmission field, especially a kind of ball chain.

Background technique

Roller chain is used and is accounted for the tool leading position always relating to linked transmission tradition, but all concentrate on the connection chain pin part at its gravity that is in the carrying of load-bearing loaded work piece state lower roller chain, make on the limited chain pin surface of contact and born great shear forces, with the passing of time cause local damage and cause the roller chain break. and owing to the load direction of tradition by the type of belt drive of sprocket wheel-roller chain structure all is only limited in the mounting plane, take advantage of when it and to be subjected to when having alternating direction power, must cause roller chain to depart from the distortion of mounting plane, this is because the defective of the project organization of conventional roller chain causes. just because of the narrow limitation on these project organizations, make roller chain show restricted application in many practical application, working life is short, the defective that maintenance cost is high. work under the particularly complicated in the open air climatic environment, be difficult to chain is implemented the sealing protection.

Summary of the invention

The object of the present invention is to provide a kind of spherical Transmitted chains that can overcome conventional roller chain structure defective, bearing under the situation of pulling force, the state of being cut and the movable secondary surface of contact that have overcome the chain pin of conventional roller chain become half garden sphere by half garden cylinder, increased area of contact, strengthened ball chain bearing capacity, and working life is improved in the elimination activity by-product gap of giving birth to automatically in long-term to-and-fro motion, has reduced maintenance cost; Owing to adopt sphere movable secondary, chain link can be in the loose constraint that 18 ° of cone angles are arranged along axis, at the long installation requirement that reduced during apart from partial installation.

Universal maintenance-free self-adjustment ball chain of the present invention comprises: 1. hemisphere; 2. coupling shaft pull bar; 3. dish-shaped ball holder; 4. chain link body; 5. steel wire clasp; 6. spring arch clasp; 7. elastic component; 8. dust-proof cover; 9. ball carriage.

Hemisphere links into an integrated entity by the coupling shaft pull bar of spring steel snap ring and ball chain, simultaneously its spherical surface body part basic structure of forming the movable subjoint of this ball chain by the dish-shaped ball holder of being made by PETG (engineering plastics POM material) and the ball carriage support of indent hemisphere profile plays similar universal bearing effect.The movable subjoint assembly of the common sphere of forming of hemisphere makes the ball chain can accomplish universal rotation.Simultaneously in design in conjunction with existing selflubricating The Application of Technology, the dish-shaped ball holder of making at the hemisphere and the POM material of bearing steel is by adopting two kinds of unlike material manufacturings and having created the necessary condition of oil-free self lubrication in the mode that sphere cooperates for this mechanical mechanism that is rotationally connected.

Wherein by hemisphere 1, dish-shaped ball holder 3, the movable subjoint assembly of the sphere role that ball carriage 9 and coupling shaft pull bar 2 are formed is:

(1) when the ball chain when hanging weight, holder is connected with ball to have adopted hemisphere in the movable subjoint structure of sphere, not only increased the movable secondary load-bearing area of contact of ball chain greatly, and can disperse along sphere by force direction on the ball chain, so just avoid the largest portion shear fracture power of conventional roller chain in the chain pin segment set, increased the bearing power of unit area on the ball chain junction surface to greatest extent.

(2) in real work because the influence of various complex external force factors, chain is often to change hanging the direction of drawing weight to bear longitudinal pulling force, and have indefinite multidirectional, characteristics such as property, warping property, intermittence, impact alternately, and traditional roller chain can only be subjected to swing in the same plane of force direction on the edge at work, when be subjected to multidirectional, alternately property, when the warping property active force influences, chain just is in the stressed working state of distortion, be easy to damage, working life is very short.And ball chain of the present invention adopts the turntable design of spherical pair joint, make each chain link of ball chain rotate (not being subjected to certain to be subjected to the restriction of force direction or planar range), can when the ball chain be worked, regulate voluntarily and bear from the external force effect on different or the complicated alternating direction along omnibearing stereo space free in 0 ° of-18 ° of cone angle scope of axis.

The present invention is also connected by coupling shaft pull bar 2 usefulness snap rings 6 between each adjacent two pitch chain abridged edition body of ball chain, chain internode elastic component 7 is set between the coupling shaft pull bar, play remedying automatically and eliminate the movable auxiliary air gap of ball chain, the ball chain is effectively born and subdue owing to mainly be subjected to intermittence on the unstable longitudinal direction that causes of force direction upper pulling force or alternation reverse impact power to cause gap collision between each chain link to bring damage to the ball chain.

The present invention is in each active section coupling shaft linkage structure of ball chain between the chain link, adopt scalable distortion dirt-proof boot, can effectively prevent open-air rocky dirt and the greasy dirt intrusion resistance stasis of blood, the cleaning that keeps ball chain turning joint part parts, reduce cleaning maintenance work amount, also reduce simultaneously the wearing and tearing between parts, improve the working life of ball chain.The characteristics of long-term work under harsh weather such as ball chain of the present invention can be in the open air, down-hole, desert, seabeach and the geographical environment.

Show according to oil field relevant pumping unit control group laboratory data on probation, the stretching resistance intensity of ball chain, wear resistance, corrosion resistance and comprehensive working life all exceed (one traditional roller chain is day and night being worked working life generally at about two months on the pumping unit on the same stage, and the test of a ball chain of the present invention can reach more than seven months working life) more than four times than roller chain.Assembling amount with the up to a hundred mouthfuls of pumping unit of well in single oil producing operation district is calculated, and direct economic benefit is just considerable.Also simplify, reduced field operation workman dismounting simultaneously greatly, changed, installed technical difficulty requirement, the physical labor intensity of chain and saved a large amount of workload and plant maintenance spendings of chain being carried out maintaining.

Description of drawings

Accompanying drawing 1: ball chain mechanical construction drawing;

Accompanying drawing 2: ball chain and sprocket revolution Working state analysis figure.

The accompanying drawing marking explanation:

1. hemisphere; 2. coupling shaft pull bar; 3. dish-shaped ball holder; 4. chain link body; 5. steel wire clasp; 6. spring arch clasp; 7. elastic component; 8. dust-proof cover; 9. ball carriage.

Embodiment

Below in conjunction with accompanying drawing embodiments of the invention are described in further detail.

Embodiment 1

1-3. is subjected to the pulling force effect or is subjected to the load-bearing target object that the sprocket wheel dynamic action starts drag ball chain left-hand end upwards or to predetermined direction moving when ball chain right side in conjunction with the accompanying drawings. and its process is: coupling shaft pull bar 2 is transmitted to hemisphere 1 with traction power by Spring Steel Wire clasp 6, hemisphere by and the movable subjoint of sphere between the sphere fitting surface with the gravity split-up to the movable subjoint of sphere, by its fitting surface and Spring Steel Wire clasp 5 traction power is transmitted to chain link body 4 by the movable subjoint of sphere then, the ball chain is finished with its left end load-bearing object upwards or the working procedure of moving to predetermined application of force direction with ball chain body 4.

The present invention adopts the design of spherical pair articulation structure, and each chain link of ball chain can be regulated and bear when the ball chain be worked from the external force effect on different or the complicated alternating direction voluntarily along freely rotating in 0 ° of-18 ° of cone angle scope of axis.

Holder is connected with ball to have adopted hemisphere in the movable subjoint structure of sphere, not only increased the movable secondary load-bearing area of contact of ball chain greatly, and can disperse along sphere by force direction on the ball chain, design has not only changed the character that traditional ball chain is mainly born the longitudinal shear collapsing force fully like this, and has increased the bearing power of unit area on the ball chain junction surface to greatest extent.

In ball chain coupling shaft mechanism, adopt chain internode elastic component 7, play to remedy automatically and eliminate movable secondary joint gap in each chain link body of ball chain, make the ball chain in actual use because during the unstable tensile load of carrying, because the damage that the collision phenomenon that the gap that exists between each chain link body causes causes.

Consider that some Environmental Conditions is very abominable and don't be convenient to do the factor of regular maintenance, the different materials manufacturings are adopted in hemisphere 1 and dish-shaped ball holder 3 in the movable subjoint of sphere, have created oil-free lubrication The Application of Technology condition between parts.

Between chain link, adopt scalable distortion boot seal 8, can effectively prevent open-air rocky dirt and the greasy dirt intrusion resistance stasis of blood, keep the cleaning of ball chain turning joint part parts, reduce cleaning maintenance work amount, also reduce simultaneously the wearing and tearing between parts, improve the working life of ball chain.

All exposed outer surface of ball chain are through environmental protection Dacroment top layer coating processing, can protect the ball chain work in the open air and IFR conditions under avoid the erosion of harmful liquid gas in working, help prolonging ball chain operating life.

In sum, the structure of above-mentioned ball chain has in use been simplified the user and has been used the ball chain to substitute the technical requirements and the maintaining workload of conventional roller chain, has also reduced the cost that chain uses and changes.

In the whole process of ball chain design and trial-production, just not only the technical performance and the quality of product of new product proposed clear and definite requirement and data target, and Economy, the manufacturability index of product also proposed the definite target requirement.No matter be that art designs, production technology are prepared, test of the technical modelling of trial-manufacture of sample and finished product measured test or pay the assessment on probation of actual applying unit on the spot, result data all reach the Economy requirement of every practicability technical requirements that this product specification thought requirement reaches and good alternative existing product.

The present invention for example can be applicable to oil exploration industry applicable to using under the complex working condition condition, uses as large-scale oil recovery oilfield pumping unit upper piston tractive chain.

Claims (4)

1. universal maintenance-free self-adjustment ball chain, it is characterized in that, form by hemisphere (1), coupling shaft pull bar (2), dish-shaped ball holder (3), chain link body (4), steel wire clasp (5), spring arch clasp (6) elastic component (7), dust-proof cover (8), ball carriage (9);

Hemisphere (1) links into an integrated entity by the coupling shaft pull bar (2) of spring arch clasp (6) with the ball chain;

The spherical surface body part of hemisphere (1) cooperates with sphere with dish-shaped ball holder (3) and ball carriage (9), coupling shaft pull bar (2) are formed the movable subjoint structure of sphere;

The movable subjoint of sphere is transmitted to ball chain body (4) by fitting surface and steel wire clasp (5) with ball chain body (4) with traction power.

2. ball chain according to claim 1 is characterized in that, is connected with snap ring (6) by coupling shaft pull bar (2) between the two adjacent ball chains.

3. ball chain according to claim 1 is characterized in that, between the coupling shaft pull bar (2) of each chain link body elastic component (7) is set.

4. ball chain according to claim 1 is characterized in that, between the chain link in each active section of ball chain, coupling shaft, linkage structure, adopts scalable distortion boot seal (8).

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