CN201461859U

CN201461859U - Double-layer transmission pin-roll chain

Info

Publication number: CN201461859U
Application number: CN2009201218060U
Authority: CN
Inventors: 金涛; 丁文捷; 马宇山; 刘金玲
Original assignee: Zhejiang University ZJU
Current assignee: Zhejiang University ZJU
Priority date: 2009-06-02
Filing date: 2009-06-02
Publication date: 2010-05-12
Anticipated expiration: 2019-06-02

Abstract

The utility model discloses a double-layer transmission pin roll chain which is formed by successively connecting a plurality of pin-roll chain units, wherein each pin roll chain unit includes an inner link and an outer link, the inner link and the outer link form a hinge through a pin roll and a shaft sleeve in a coaxial socket-and-spigot fit manner, and an outer chain and an inner chain can have the circular movement around the pin roll; and the pin roll includes an outer sleeve and an inner pin roll, a structure combining an inner interference sleeve and an outer interference sleeve is formed through the technology of shrinkage fit manufacture, and the double-layer combined structure can develop the antifatigue property and the ductility of different materials inside and outside, and efficiently avoids the phenomenon that the pin-roll chain appears the entire fracture and invalidation because of the inner extension of diameters of cracks on an axial surface during the utilization process. The utility model has the advantages of simple structure, easy manufacture, high reliability and long service life; and moreover, by adopting the double-layer pin roll chain system, the utility model can prolong the service life of equipment, reduce production and maintenance costs, and ensure the safe operation.

Description

A kind of double-layer transmission pin shaft chain

Technical field

The utility model belongs to that chain type is carried and the elevating mechanism field, relates in particular to lifting, the conveying of various materials, the heavy load transmission chain structure of discharging machinery.

Background technique

In the prior art, the main transmission component of chain type conveying equipment is a bearing pin chain, and the main failure forms of bearing pin chain is the bearing pin chain fracture.The inefficacy time limit of conventional design was generally 10 years; Handle through carburizing, pill spraying surface reinforcing, its increase fatigue life generally is no more than 15%; Because service condition is dust, hot environment, bears shearing, crooked iso-stress effect simultaneously, form fatigue crack and expansion, finally cause the bearing pin fracture, life of product is shortened dramatically, only be half a year sometimes; Because bearing pin chain lost efficacy and can't predict in advance, not only caused damp production, the integral device that also causes that has is damaged, and maintenance work wastes time and energy, and has a strong impact on ordinary production.

The model utility content

The purpose of this utility model is at the deficiencies in the prior art, and a kind of double-layer transmission pin shaft chain is provided.

The purpose of this utility model is achieved through the following technical solutions: a kind of double-layer transmission pin shaft chain, it is connected to form successively by several bearing pin chain unit, wherein, each bearing pin chain unit is connected to form by inner link and outer link, inner link is made up of two axle sleeves, two carrier bars and two fasteners, the interior edge face of two carrier bars is relative, and two axle sleeves pass two corresponding holes of carrier bar, axle sleeve and hole interference fit respectively; Fastener is fixed in center, inner link carrier bar exterior edge face.Outer link is made up of two carrier bars, two bearing pins and four axle beds, and the exterior edge face of two carrier bars is relative, and four axle beds penetrate in the hole of two carrier bars axle bed and hole interference fit from outside to inside respectively; The axle bed of installing relatively on the carrier bar is inserted at the two ends of two bearing pins respectively, and the radius of bearing pin is less than the axis hole radius of axle bed.Inner link and outer link cooperate by the coaxial socket joint of bearing pin and axle sleeve and form hinge, and outer chain and interior chain can move in a circle around bearing pin.

Further, described bearing pin is made up of overcoat and interior bearing pin interference fit.

The beneficial effects of the utility model are:

The utility model simple in structure, be easy to manufacturing, reliability height, long service life.

2. adopt double-layer pin shaft chain system of the present utility model, can reduce working life of equipment and production, maintenance cost, guarantee security of operation.

Description of drawings

Fig. 1 is the structural representation of the utility model double-layer transmission pin shaft chain;

Fig. 2 is a plan view of the present utility model;

Fig. 3 is a front elevation of the present utility model;

Fig. 4 is a bearing pin composite structure schematic representation, wherein, (a) is flat shoulder form, (b) is the convex shoulder form;

Fig. 5 is the carrier bar plan view;

Fig. 6 is the carrier bar plan view;

Among the figure, 1, first axle sleeve, 2, bearing pin, 3, carrier bar, 4, fastener, 5, axle bed, 6, second axle sleeve, 7, block.

Embodiment

Describe the utility model in detail with embodiment with reference to the accompanying drawings below, it is more obvious that the purpose of this utility model and effect will become.

Shown in Fig. 1～3, double-layer transmission pin shaft chain of the present utility model is connected to form successively by several bearing pin chain unit, each bearing pin chain unit is connected to form by inner link and outer link, specifically comprise first axle sleeve 1, bearing pin 2, carrier bar 3, fastener 4, axle bed 5 and second axle sleeve 6, respectively there is 1 hole at the two ends of carrier bar 3, and middle part, exterior edge face side has two blocks 7 (face that block is arranged is carrier bar 3 exterior edge faces).Inner link is made up of 1,2 carrier bars 3 of two axle sleeves and 2 fasteners 4, and the interior edge face of two carrier bars 3 is relative, and two axle sleeves 1 pass two carrier bars, 3 corresponding holes respectively, axle sleeve 1 and hole interference fit; Fastener 4 is fixed in center, inner link carrier bar 3 exterior edge face.Outer link is made up of 2 carrier bars 3, two bearing pins 2 and four axle beds 5, and the exterior edge face of two carrier bars 3 is relative, and four axle beds 5 penetrate respectively in the hole of two carrier bars 3 from outside to inside, axle bed 5 and hole interference fit; The axle bed of installing relatively on the carrier bar 5 is inserted at the two ends of two bearing pins 2 respectively, and the radius of bearing pin 2 is less than the axis hole radius of axle bed 5, and bearing pin 2 can freely roll in axis hole.Inner link and outer link cooperate with axle sleeve 1 coaxial socket joint by bearing pin 2 and form hinge, and outer chain and interior chain can move in a circle around bearing pin 2.The fastener 4 of inner link has stoped the axial float of the carrier bar 3 of outer link.

As shown in Figure 4, bearing pin 2 is made up of overcoat 22 and interior bearing pin 21, form inside and outside interference sleeve composite structure by the hot jacket processing technology, this double-deck composite structure can be brought into play the fatigue resistance and the toughness of inside and outside different materials, effectively prevents to extend in the bearing pin chain using process because the footpath of axial plane crackle the whole fracture failure that causes.In actual the use, even there is crackle, crack propagation also is confined to the bearing pin skin, promptly ends to inner ring.Like this, exist at skin under the situation of penetrated crack, the integral body of bearing pin is sheared and flexural strength still can be guaranteed by internal layer, can continue to use, and does not need to change.Overcoat uses 35CrMo alloy steel seamless pipe, depth of hardening 2-3mm; Interior bearing pin uses 45 steel; In the high temperature oil bath, add hot jacket under the 450-500 ℃ of condition, again with the coaxial hot jacket of axle and overcoat, the cooling back forms interference fit, and magnitude of interference is 0.08-0.15mm.Wherein, if double-layer transmission pin shaft chain of the present utility model is used for heavy duty, can adopt flat shoulder formula structure shown in the figure (a); If double-layer transmission pin shaft chain of the present utility model is used for underloading, can adopt salient shoulder type structure shown in the figure (b).

As a kind of preferred, two fastener 4 positioned opposite can prevent the chain link slippage in the export-oriented end face of inner link center.

Come the utility model is further described in detail with some embodiments below, but the utility model is in no way limited to these embodiments.

Double-deck bearing pin delivery chain of the present utility model can be used for the transmission of noria, be used for cement, cinder, the transportation of industrial waste ballast. at first, critical component bearing pin 2 is made up of overcoat 22 and interior bearing pin 21, in forming by the hot jacket processing technology, outer interference sleeve composite structure, form outer tension, the prestressing force of internal layer pressurized, can improve the fatigue resistance of axle. because bearing pin running environment can not change, be that germinating of bearing pin surface crack and expansion are a kind of inevitable situations, can make effectively and extend to the internal layer surface in the footpath of bearing pin chain axial plane crackle and promptly stop, can not form bearing pin because the final fracture that crack propagation causes, having under the situation of crackle, still can guarantee equipment safety operation. secondly, the internal and external layer bearing pin can use different materials, forms the inner link and the outer link of chain, also can use with a kind of carrier bar, structure is identical, therefore, can reduce production costs; Inner link is made up of two relative carrier bar 3 and two axle sleeves 1 of interior edge face; Outer link is made up of the opposing carrier bar 3 of two interior edge faces and two bearing pins 2 and four axle beds 5; Fastener 4 is installed on inner link carrier bar 3 export-oriented end face centers; Inner link and outer link cooperate with axle sleeve 1 coaxial socket joint by bearing pin 2 and form hinge, outer chain and interior chain can be done local circular movement around bearing pin 2. alternately connect to form the noria Conveying chains of a sealing by inner link and outer link. when the bearing pin inefficacy takes place, what at first go wrong is overcoat 22, cut apart owing to exist between overcoat 22 and the interior bearing pin 21, can not form in the crackle and expand, bearing pin still can effectively carry, can select to change up to repair and maintenance. therefore, move safer, can not lose efficacy moment and cause production accident, incur loss through delay and produce, simultaneously, simple in structure, it is convenient to safeguard, working life is longer.

Claims

1. double-layer transmission pin shaft chain, it is characterized in that, it is connected to form successively by several bearing pin chain unit, wherein, each bearing pin chain unit is connected to form by inner link and outer link, and inner link is made up of two axle sleeves (1), two carrier bars (3) and two fasteners (4), and the interior edge face of two carrier bars (3) is relative, two axle sleeves (1) pass the corresponding hole of two carrier bars (3), axle sleeve (1) and hole interference fit respectively; Fastener (4) is fixed in inner link carrier bar (3) center, exterior edge face; Outer link is made up of two carrier bars (3), two bearing pins (2) and four axle beds (5), and the exterior edge face of two carrier bars (3) is relative, and four axle beds (5) penetrate respectively in the hole of two carrier bars (3) from outside to inside, axle bed (5) and hole interference fit; The axle bed of installing relatively on the carrier bar (5) is inserted at the two ends of two bearing pins (2) respectively, and the radius of bearing pin (2) is less than the axis hole radius of axle bed (5); Inner link and outer link cooperate with the coaxial socket joint of axle sleeve (1) by bearing pin (2) and form hinge.

2. according to the described double-layer transmission pin shaft chain of claim 1, it is characterized in that described bearing pin (2) is made up of overcoat (22) and interior bearing pin (21) interference fit.