CN1746528A

CN1746528A - Open chain

Info

Publication number: CN1746528A
Application number: CN 200510091634
Authority: CN
Inventors: 于尔根·伯格霍夫; 索斯滕·沃茨
Original assignee: Theile JD GmbH and Co KG
Current assignee: Theile JD GmbH and Co KG
Priority date: 2004-09-10
Filing date: 2005-08-11
Publication date: 2006-03-15
Anticipated expiration: 2025-08-11
Also published as: CN100472090C; DE202004014062U1

Abstract

The present invention relates to an opening chain having a series of chain loops clasping each other, the chain loop sequence is composed of repeating sub-sequence chain loop, in each sub-sequence, a first chain loop is separated provided having a dividing element projecting from side internal side to inside, reducing the inner radii in transverse direction and dividing the internal chamber of the chain loop into two active chambers at least on one of its two straight edge, when the chain is loose, the second chain loop in the first chain loop is hitched, restrained by effective width of at least a dividing element and external shape, diameter and/or other active chamber internal length of the second chain loop inserting the first chain loop, only the part intruding into the first chain loop active chamber is achieved, that is when a longitudinal axis of the second chain loop is moved from an intended, substantially aligned position by less than 90 degrees, an outside of an arc portions of the second chain loop that engages a movement space of the first chain loop contacts the dividing element, and an inside of a shank portion of the second chain loop contacts an arc portion of the first chain loop.

Description

Open link

Technical field

The present invention relates to a kind of open link, it by a series of each other in succession mutually the chain link of hook form.

Background technique

Open link is made up of many chain links of mutual hook one by one.For industrial open link, as lifting chain or the open link that for example uses in the down-hole coal excavation in mining industry, each chain link is subjected to high pulling load.When each chain link when two arcuate segments that face with each other of arranged in succession and per two chain links in succession recline mutually with their inboard in accordance with regulations, open link has the load carrying capacity that bears of its maximum., the rated load ability of open link, common precondition are that the chain link that is in the open link under the tensile stress state is arranged mutually in the above described manner in accordance with regulations.But when if each chain link is not in its in accordance with regulations arrangement position, for example hang second chain link in first chain link and be not with the inboard of its arcuate segment but with the inboard on its limit and the arcuate segment adjacency of first chain link, then this chain link can not bear rated load.Therefore, this chain link constitutes the weak spot of open link.When chain is in the relaxed state that is not subjected to tensile stress, each chain link is shifted each other, and each chain link remains in this dislocation configuration each other when this open link is in load condition again.So open link knot.The open link of knot not only means and weakened its load carrying capacity, but also exists the knot section of open link to damage or even destroy the danger of the drive unit that is used for delivering chain.Owing to this reason, the open link as flight conveyer when down-hole coal excavation must add pretightening force and check in the chain that hangs before its stand under load.

Summary of the invention

Therefore, from above-mentioned prior art, the technical problem to be solved in the present invention is the open link that further develops the described type of preface, even make the danger of open link knot can not thoroughly avoid also dropping to minimum level.

Above-mentioned technical problem by a kind of by a series of each other in succession mutually the open link formed of the chain link of hook solve, according to the present invention, this chain link sequence is made up of the chain link sub-sequence of some repetitions, has respectively in each chain link sub-sequence

-first chain link its two limits that arcuate segment is connected to each other one of at least on, there is a inboard to stretch out inwards, make and to reduce and the inner chamber of chain link is divided into the division element in two movable chambeies that separate each other along horizontal clean internal diameter from this limit, and

-when chain slack, next second chain link hanging in first chain link, be subjected to described at least one restriction and being subjected to of Effective face width of dividing the border, the movable chamber of formation first chain link of element wherein to be inserted with the external frame of second chain link of first chain link, the restriction of the inner length in diameter and/or its movable chamber, can only invade in the movable chamber of first chain link to such degree, promptly, when the longitudinal axis of second chain link is in one when it removes less than 90 ° position with the position of the first chain link longitudinal axis alignment in accordance with regulations, the lateral branch that this second chain link inserts the arcuate segment in the movable chamber of first chain link leans against on the division element of first chain link, meanwhile, the inboard of adjacent straight flange with resting on that arcuate segment of dividing on the element of this second chain link abuts on the arcuate segment that first chain link constitutes this border, movable chamber.

This open link is by forming according to the sub-sequence that is designed to two or three direct a kind of repetitions of chain link in succession, these chain links are so coordinated each other in their above-mentioned characteristic aspect, promptly, second chain link can be shifted with respect to first chain link, yet this displacement automatically terminated or ajusts again when applying tensile stress on open link.For this purpose, first chain link has one to divide element, and more appropriate is to have two with respect to the opposed symmetrically division element of longitudinal axis, by them the inner chamber of first chain link is divided into two spaced-apart movable chambeies.In addition, reduced chain link along horizontal clean internal diameter by one or more division elements, but do not constituted a continuous strut rail.Because this strut rail can reduce the fatigue strength of chain link.In each movable chamber, hang a chain link in succession.Divide element and can be designed as the projection that stretches out from the inboard, limit that connects the first chain link arcuate segment.There is a kind of like this effective internal length in the movable chamber that wherein is inserted with first chain link that is suspended on follow-up second chain link in the movable chamber of first chain link, promptly, whereby, the structural design that depends on especially relevant its width of one or more division elements, the section that second chain link is suspended in first chain link can only be invaded in movable chamber to such degree, promptly, when the inboard on the second chain link limit abutted on the arcuate segment of first chain link, the outside of the arcuate segment that adjoins of limit then rested on the division element of first chain link therewith.Because in a kind of like this position (shifting out from the position that the longitudinal axis alignment of itself and first chain link is arranged less than 90 ° angle) after being shifted at the longitudinal axis of this position second chain link, curved surface rested on and divided on the element this moment, thus when on open link, acting on pulling load second chain link automatically turn to again its in accordance with regulations with the position of the longitudinal axis alignment of first chain link.The intrusion degree of second chain link when like this displacement, depend on the movable chamber of first chain link that wherein hangs second chain link effective inner width, second chain link diameter and have the arcuate segment of first chain link to insert wherein the movable chamber of second chain link effective internal length.For the designed openings chain, above-mentioned parameter is coordinated with each other as described below in principle, and the displacement of second chain link causes above-mentioned dissoluble layout when making chain slack.When the pitch of chain link and diameter regulation, one or more division elements of first chain link correspondingly are shaped and determine its size, in order that when the displacement of the second chain link generation aforesaid way at the most the lateral branch of the second chain link arcuate segment lean against on the division element.Follow-up next again the 3rd chain link is hung into the arcuate segment in second chain link, can be used to limit the movable chamber of second chain link effective internal length that wherein is inserted with first chain link.By this design, the diameter of the 3rd chain link arcuate segment has been determined the freedom of movement of second chain link.Wherein be inserted with effective inner length in the movable chamber of second chain link of first chain link, also can limit formation by two projections or the prominent head that stretches out from two limits that connect the second chain link arcuate segment.Certainly, this movable chamber also can be only by a projection restriction of stretching out from a limit.Therefore, the chain link of sub-sequence also can be designed as identical structure in principle.

For this open link, wherein, each second chain link rests on described at least one division element of first chain link with the arcuate segment LHA that it is hung in first chain link at the most, meanwhile the straight flange inboard of arcuate segment adjacency abuts on the arcuate segment of first chain link therewith, when second chain link is shifted, just along the track of a bending, for example circular trace is placed on its position in accordance with regulations second chain link.This just can not make second chain link constitute 2 stable supportings when second chain link is in the knot threshold state with respect to first chain link on first chain link, and this stable 2 are bearing in and may resist second chain link when open link is applied in pulling load and ajust.

In addition, another advantage of this chain that uses in the flight conveyer field is because vertical chain link has the division element, effectively to have prevented scraper plate or the possible intrusion of push pedal to this flight conveyer.

Description of drawings

By embodiment the present invention is described referring to accompanying drawing.Wherein:

Fig. 1 schematically illustrates the perspective view of part open link;

Fig. 2 represents the sectional arrangement drawing of chain link sub-sequence shown in Figure 1; And

Fig. 3 represents the sectional arrangement drawing of chain link sub-sequence when chain link is in another position mutually shown in Figure 1.

Embodiment

In illustrated embodiment, open link by the

vertical chain link

2,2 that is designed to plate link chain ' with always the horizontal chain link 3 of two vertical chain links 2,2 ' be connected to each other is formed.Fig. 1 has represented the sub-sequence of open link 1 chain link.This sub-sequence comprises one first chain link, and this is vertical chain link 2 in illustrated embodiment.The inner length of chain link 2 is divided into two movable chambeies that separate each other by each one from the projection 8,9 that two arcuate segments, 4,5 interconnected limits 6,7 are stretched out.Projection 8,9 faces arcuate segment 4 or 5 parts are designed to the inclined-plane at it, and here this inclined-plane can be crooked equally, recessed rightly abutting on second chain link, 3 curved surfaces bently.The distance on 8,9 two surfaces that face one another of projection is for this purpose less than the diameter of horizontal chain link 3.Second chain link in first chain link, 2 back, promptly horizontal chain link 3 is hung in the movable chamber of first chain link 2.Second chain link 3 has a unique single-unit activity chamber, wherein, first chain link 2 and the 3rd chain link after second chain link 3 that is vertical chain link 2 ' its arcuate segment 5 is all inserted in this movable chamber.Therefore, second chain link 3 is with respect to the movement of first chain link, is subjected to the 3rd follow-up chain link 2 ' insert the equally restriction of the arcuate segment in second chain link, the 3 movable chambeies.

Chain link sub-sequence when Fig. 1 and 2 is illustrated in chain slack (=dangle), this moment, horizontal chain link 3 shifted out from its state of arranging alignedly in accordance with regulations with the longitudinal axis of its longitudinal axis and first chain link 2, and its section that faces chain link 2 is invaded in the movable chamber of chain link 2.The longitudinal axis of second chain link 3 less than 90 °, and intersects an obtuse angles beta with the longitudinal axis of first chain link 2 with respect to the displacement of the longitudinal axis of first chain link 2.Illustrated

chain link

2,3,2 ' coordination each other under, the medial branch on horizontal chain link 3 one of them limit 10 leans against on the arcuate segment 5 of first chain link 2.In addition, in the position shown in Fig. 1 and 2, the outside 11 of horizontal chain link 3 arcuate segments 12 abuts on the projection 9 and (only schematically illustrates in Fig. 2).Here importantly,, occur in 11 zones, the outside of chain link 3 arcuate segments 12 before the straight flange 10 that arcuate segment 12 carries out the transition to arcuate segment adjacency therewith as leaning between the projection 9 of dividing element at second chain link 3 and first chain link.The transition point in 10 straight outsides to the limit, the outside 11 of arcuate segment 12 bendings is expressed with vault line S in the drawings.

When applying pulling load on open link 1 or on the sub-sequence of expression in the drawings, the chain link 3 successfully position after the displacement that it is represented among Fig. 1 and 2 is placed in its position in accordance with regulations, its longitudinal axis and two

contiguous links

2,2 under this position ' longitudinal axis alignment, and thereby the inboard that hangs the chain link arcuate segment of mutually be adjacent to each other.Because the intrusion degree of second chain link 3 in first chain link, 2 movable chambeies is subjected to the restriction of the arcuate segment in chain link 2 ' insertion second chain link 3 movable chambeies, the 10 straight outsides, its limit are abutted on the outside of projection 8,9 so chain link 3 can not be placed in.Therefore, when second chain link 3 is on the less offsetting position with respect to first chain link 2, need one, be in accordance with regulations allocation position with respect to

contiguous links

2,3 so that make chain link 3 be placed in it with respect to open link direction of traction straight line motion at an angle.Therefore knot can not take place in described open link.

This is not only applicable to situation represented among Fig. 1 and 2, and wherein the longitudinal axis of second chain link 3 is less than or equal to 90 ° with respect to the angle of the displacement of second chain link, 2 longitudinal axis; And be applicable to this position after the displacement of second chain link 3, promptly wherein these two longitudinal axis intersect one less than 90 ° angle beta, as shown in Figure 3.By

chain link

2,3,2 ' mutual coordination of representing in Fig. 3, the lateral branch on limit 10 leans against on the projection 8,9, prevents that thus second chain link 3 further is shifted with respect to first chain link 2.Therefore, by this when displacement first chain link 2 play the projection 8,9 of backstop effect, also can determine the size of the minimum angles that

chain link

2,3 longitudinal axis can intersect.For the

chain link

2,3,2 of pressing Fig. 3 ' coordination, when applying tensile stress on open link 1, second chain link 3 is around the arcuate segment 5 of first chain link 2 and correspondingly also arcuate segment hinge shape rotation in second chain link, the 3 movable chambeies around chain link 2 ' extensions.By the above-mentioned design of

chain link

2,3, when chain link 3 when ajust its position of representing among Fig. 3, play the contact between the projection 8,9 of backstop effect when just in 11 zones, the outside of second chain link, 3 arcuate segments 12, appearing at this displacement again.

Press the chain link sub-sequence shown in the figure, described chain link 2 ' constitute first chain link for follow-up another horizontal chain link of not representing again.In this way, the total length along open link 1 repeats this sub-sequence.

In illustrated open link 1, the pitch of each chain link is about 4 with the diameter ratio.When hanging second chain link 3 of to be designed to the circle chain link, the division element that plays projection 8,9 effects only rests on it on the side surface that outside vault line has.In addition, when be provided with two with respect to first chain link vertically in during in the face of the division element 8,9 that claims design, the shearing that is delivered on first chain link 2 from second chain link 3 absorbs when the displacement equably, and imports in the limit 6,7 of each adjacency.Therefore, finally also bear the function of known central strut rail, yet improved importing into of power when being subjected to shearing stress here although divide element.In addition, the fatigue strength of this chain link of being explained, more much higher than the fatigue strength of chain link with a strut rail that connects two limits.

Can know by explanation of the present invention and to find out, horizontal chain link 3 with respect to vertical chain link 2,2 ' only by or move around turning point or along the hinge shape of a circle track, the position after just offsetting from vertical chain link with respect to adjacency move to its in accordance with regulations the position or with the allocation position of contiguous links.

Claims

1. open link, its by a series of each other in succession mutually the chain link of hook forms, it is characterized by: this chain link sequence is made up of the chain link sub-sequence (2,3,2 ') of some repetitions, always presses this sub-sequence

-first chain link (2) its two limits (6,7) that arcuate segment (4,5) is connected to each other one of at least on, have one from the limit inboard of (6,7) stretches out inwards, makes and reduce and the inner chamber of chain link (2) is divided into the division element (8,9) in two movable chambeies that separate each other along horizontal clean internal diameter, and

-when chain slack, next second chain link (3) of hanging in first chain link (2), be subjected to described at least one division element (8, the restriction of the Effective face width on border, the movable chamber of formation first chain link (2) 9) and being subjected to wherein is inserted with the external frame of second chain link (3) of first chain link (2), the restriction of the inner length in diameter and/or its movable chamber, can only invade in the movable chamber of first chain link (2) to such degree, promptly, when the longitudinal axis of second chain link (3) is in one when it removes less than 90 ° position with the position of first chain link (2) longitudinal axis alignment in accordance with regulations, the outside (11) of the arcuate segment (12) in this movable chamber of second chain link (3) insertion first chain link (2) rests on the division element (8 of first chain link (2), 9) on, meanwhile, this second chain link (3) divide element (8 with resting on, the inboard of the straight flange (10) that arcuate segment 9) is adjacent abuts on the arcuate segment (5) that first chain link (2) constitutes this border, movable chamber.

2. according to the described open link of claim 1, it is characterized by: two limits (6,7) of described first chain link (2) all have a division element that stretches out inwards (8,9), and, divide element design for these two and be mutually symmetrical for vertically middle face with respect to this chain link (2).

3. according to claim 1 or 2 described open links, it is characterized by: second chain link (3) is invaded the degree in the movable chamber of first chain link (2), is determined by the inner length in the movable chamber of second chain link (3) that wherein is inserted with first chain link (2).

4. according to the described open link of claim 3, it is characterized by: second chain link is invaded the degree in first chain link activity chamber, by wherein being inserted with first chain link and being determined by at least one projection that stretches out from the inboard on one of its limit of second chain link or prominent inner length of dividing the movable branch of second chain link chamber that forms.

5. according to claim 1 or 2 described open links, it is characterized by: second chain link (3) is invaded the degree in the movable chamber of first chain link, is subjected to the follow-up restriction that is hooked on the arcuate segment diameter of the 3rd chain link (2 ') in second chain link (3).

6. according to the described open link of one of claim 1 to 5, it is characterized by: described open link is made up of vertical chain link that is designed to plate link chain (2,2 ') and horizontal chain link (3), and wherein, vertical chain link (2,2 ') has one or more division elements (8,9).