EP3810958A1

EP3810958A1 - Block lock for round steel chains for mining

Info

Publication number: EP3810958A1
Application number: EP19734681.0A
Authority: EP
Inventors: Till STUKENBERG
Original assignee: Schmiedestueck Vertrieb Feuerstein GmbH
Current assignee: Schmiedestueck Vertrieb Feuerstein GmbH
Priority date: 2018-06-22
Filing date: 2019-06-24
Publication date: 2021-04-28
Also published as: CN112292545A; CA3103338A1; SG11202012870QA; KR20210034593A; DE102018115129B3; WO2019242819A1; US20210108704A1; BR112020026177A2; MX2020013438A; US20210239184A1; AU2019289489A1; ZA202007499B

Abstract

Block lock (100) for round steel chains, having two half-elements (10) which are displaceable relative to one another for opening and closing the block lock (100) and which each have ends connected to one another via a longitudinal web (10.1), of which in each case one end has an insertion plug (11) with a width reduced in relation to the longitudinal web and with retaining webs (13.1, 13.2) integrally formed on both sides, wherein at least two parallel retaining webs (13.1, 13.2) are arranged above one another on each side, and of which in each case the other end has a receiving pocket (12) which serves to receive the insertion plug (11) and on the two lateral inner flanks of which there are in each case formed at least two retaining grooves (14.1, 14.2) above one another to form a toothing by receiving the retaining webs (13.1, 13.2). A central web (10.2) extends inwardly from at least one longitudinal web (10.1). The insertion plug (11) widens, as seen in side view, from the longitudinal web (10.1) towards its end, and the length of the retaining webs (13.1, 13.2) increases. At the same time, the receiving pocket (12), as seen in side view, narrows from the longitudinal web (10.1) to its end.

Description

Block lock for round steel chains for mining

The invention relates to a block lock for round steel chains for mining with the features of the preamble of claim 1.

In mining, chain locks are used to transmit high tensile forces, for example in planing systems, in order to lengthen chains or to repair broken chains. The chain locks must be divisible in half in order to attach them to existing chain links at one end of the chain. The requirement for the chain lock is not only to be able to reliably transmit the high tensile forces within the chain strand, but also to offer sufficient strength in the event that the chain lock is not along the longitudinal axis due to an inclined position, for example on a deflection roller is loaded, but diagonally or even across it. In addition, the geometry must be such that the adjoining chain elements can be securely picked up, but also remain flexible. Finally, the chain lock should run within the chain strand and should also be able to be guided over deflection devices or other guide devices without getting caught.

The chain locks for use in mining are between

Flat locks according to DIN 22258-1 and block locks according to DIN 22258-2 distinguished. The flat lock is used in the planing chain, whereas the block lock is mainly used for conveyor chains

Commitment comes. The flat lock can run both horizontally and vertically through the sprocket. The block lock may only run vertically through the chain wheel.

A block lock of the generic type is known from DE 203 07 184 U1, which is designed in such a way that the height measured transversely to the longitudinal extension of the chain strand is not greater than that of the adjacent chain links. Because two retaining grooves and two retaining webs are provided for connecting the half-elements, reliable power transmission is also achieved when the block lock runs, for example, around a deflection wheel, with forces occurring at an angle to the longitudinal axis which occur due to the overlapping flanks on the guide grooves and Leaders can be transferred.

The disadvantage of the known block lock is that it can only be installed by means of an assembly direction oriented transversely to the longitudinal extent of the chain strand. The two chain ends must first be held freely in front of each other. A half element of the block lock is inserted into each of the chain ends. The half-elements are then shifted against each other in such a way that the retaining webs can be inserted into the associated retaining grooves. After the half-elements have been assembled to form the chain lock and are secured against each other by a locking pin, the block lock must still be swiveled 90 ° from its installation position in its position of use so that it fits into the longitudinal extension of the chain strand. In view of the considerable dimensions and the resulting masses of mining chains and the associated block locks, vertical assembly is not easy and cannot be carried out by one person alone. The well-known block lock cannot be mounted well on chain pieces lying on a surface. It is also necessary to enter the block lock to form a continuous eye for both chain links together, the length of which is substantially greater than twice the diameter of the chain links, so that there is free space. Since the chain links connected to one another via the known block lock are not separated by a central web, there is a risk of locking, that is, both chain links can be arranged side by side on one side of the eye, so that the block lock does not extend in the longitudinal direction of the chain is pulled, but possibly stands across.

The object of the present invention is to improve a block lock of the type mentioned at the outset in such a way that it can be installed in the horizontal chain strand and that, in addition, two eyes separated from one another by a central web are formed in the finished block lock, in each of which a chain link to be led.

This object is achieved by a block lock for round steel chains for mining with the features of claim 1, which is characterized above all by a shortened closing path, but which at the same time also provides a central web.

The use in mining is essential insofar as it refers to a specific dimension of the chain links to be connected, high masses of the half-elements of the block lock and corresponding high forces for assembly. The block lock has to withstand these loads. It is not excluded that block locks designed according to the invention can also be used for other fields of application where there are similar dimensions, for example anchor chains.

As is known per se, a multi-stage toothing is provided in the half-elements of the block lock according to the invention. This is formed by two parallel retaining webs and retaining grooves, which are located in the middle of the finished block lock, at the level of the receptacles for the chain links, are arranged. As a result, the flanks of the retaining grooves and retaining webs remain largely unloaded as long as the chain is guided in a linear manner, and only a temporary loading of the flanks occurs at deflection points or in the event of chain misalignments that occur for other reasons.

An essential feature of the block lock according to the invention lies in the fact that the retaining webs and retaining grooves are each of different lengths and are arranged on receiving areas which are formed by insertion pins and receiving pockets. The insertion pin with the outwardly projecting retaining webs has the longer side at the parting plane and tapers towards the outer edge of the block lock, towards the longitudinal web, whereas the receiving pockets, in the side flanks of which are formed the holding grooves, have the narrow side in the parting plane and from there extend outwards, towards the longitudinal web.

The receiving areas are preferably trapezoidal in cross-section or viewed from the side. In the case of a trapezoidal shape, the boundary edges are straight, which is easier to edit and coordinate with one another than with the curved shapes that are also conceivable in principle. This configuration of the connection areas of the half-elements results in an assembly direction that is not exactly perpendicular to the longitudinal axis, but is inclined at an angle of about 60 ° to 85 °.

Another special feature is that the assembly can be done in two ways. The half-elements, including the chain links at the ends, can be put together in the above-mentioned, inclined assembly direction until they lie against one another before finally an axial thrust in the longitudinal direction takes place, with which the positive locking between the half-elements is produced.

According to another assembly variant with the same half-elements, several steps are made one after the other transversely to and along the longitudinal axis made, which results in a step-like movement in the side view. The second variant of the assembly, which enables the block lock according to the invention, has the advantage that a provisional form-fit is already achieved in an intermediate layer, so that the half-elements already have a transverse and a longitudinal leg after the first sequence - motion can no longer fall apart:

- The stair-shaped assembly enables z. B. assembly in the horizontal chain strand without the chain ends having to be held up. For example, the lower panel element can be placed on the surface for assembly.

- The chain links at the end of the chain sections to be connected to one another are each inserted into one of the pile elements, it preferably being provided that an inner flank on the pile element runs out in a hook shape in the direction of the parting plane, so that the chain link there is form-fitting is held.

- When assembling the flalel elements, the longer FH footbridge must first be pushed freely into the pocket. Then it can be pushed into the short flute groove in the longitudinal direction by a slight feed movement.

- In the further course, the pile elements are then pressed together again transversely to the longitudinal direction, so that the long fold web, which is closer to the parting plane, is brought out of the short groove to the fleas of the adjacent long groove.

- Finally, there is another feed movement in the longitudinal direction, in which both pleats are then pushed into the plenum grooves assigned to them in terms of their length and reach their end position.

The direction of assembly is therefore not necessarily linear, but it can also be stepped, the two chain links in the latter variant already being held securely in the intermediate step and the two Half elements are positively coupled with each other to the extent that they can no longer be accidentally torn apart.

Despite the easier assembly, the strength of the block lock is not affected. The central web, which is preferably present despite the short assembly path, prevents the halves from deflecting inwards under load, which in turn relieves the teeth of additional stresses caused by deflections. The central web of the block lock is preferably formed by two individual central webs, each of which extends inwards from the longitudinal webs of the half-elements, that is to say in the direction of the eyes to be formed. The end faces of the central webs lie in front of each other in the parting plane.

The central web can extend as far as the central axis of the block lock, so that a gapless web is present after the assembly. However, the central web can also be designed to be somewhat less high, so that the central webs, which point towards one another with gaps, nevertheless ensure the separation of the two chain links. To do this, the gap only has to be smaller than the diameter of the chain links to be connected.

The block lock according to the invention and a preferred method for its assembly are explained in more detail below with reference to the drawings. The figures show in detail:

1 shows a block lock according to the invention in a perspective view before assembly;

FIG. 2 shows a half element for a block lock in a perspective view;

3A - 3D the block lock in different assembly steps, each in a side view; and

Figure 4 shows the assembled block lock in a side view. FIG. 1 shows a block lock 100, which is formed from two half-elements 10, in a perspective exploded view. The half-elements 10 are preferably of identical design. The arrow between the half elements 10 indicates the mounting direction M, in which the upper half element 10 is placed on the lower half element 10, and the dash-dotted line the position of a longitudinal axis L.

Each half element 10 has a longitudinal web 10.1, at one end of which an insertion pin 11 is formed, the width of which is significantly reduced compared to the other sections. On the lateral outer flanks of the insertion pin 11 there are two holding webs 13.1 of different lengths,

13.2 trained. The insertion pin 11 is delimited by a flank 11.2 which extends obliquely upwards, with an inclination towards the center. The front edge 11.1 of the insertion pin 11, on the other hand, extends obliquely outwards from the outside to a parting plane that runs through the longitudinal axis L, so that a trapezoidal shape of the insertion pin 1 results in the side view.

At the opposite end of the longitudinal web 10.1 of the half element 10, a receiving pocket 12 is formed, which is also delimited by an oblique flank 12.2, the inclination of which corresponds to the inclination of the flank 11.2 on the insertion pin 11. Receiving pockets 12 and insertion pins 11 form mutually complementary receiving areas; this means that recesses and grooves on one side interact with projections and webs on the respective counterpart.

A central web 10.2 is formed between the insertion pin 11 and the receiving pocket 12 and projects transversely from the longitudinal web 10.1. In addition, bores 17, 18 are provided, into which securing pins 20 can be inserted later, after the half-elements 10 have been joined.

FIG. 2 shows a single half element 10 in a perspective view, in particular to show the shape of the holding webs 13.1, 13.2 in the insertion pin 11 and the associated holding grooves 14.1, 14.2 in the receiving pocket 12. Crosspieces 13.1, 13.2 and grooves 14.1, 14.2 have axially parallel upper and lower edges, which are used for power transmission, and each have a rounded end toward the end faces to make assembly easier.

FIG. 3A shows a first assembly step in a side view. In a lower half-element 10, a chain link 1 is inserted on the left, which is held in a form-fitting manner on a hook-shaped projection 18. Another half element 10 is shown above it. This receives a second chain link 2 on the right, which is also guided and held in an early assembly stage via a hook-shaped projection 18. The vertical dashed lines indicate the position of the respective edge in the receiving pocket 12, which the longer holding web 13.1 of the insertion pin 11 must first pass through. Since both the retaining grooves 14.1, 14.2 and the associated retaining webs 13.1, 13.2 are rounded at the ends, the starting position of the two half-elements 10 shown in FIG. 3A is possible with only a very slight axial offset from one another. This results in a very short closing path, which can take place entirely within the respective eye of the connected chain links 1, 2. A subsequent swiveling of the block lock 100 into the course of the chain is therefore not necessary.

FIG. 3B shows the next assembly step, in which the holding elements are approximated further so that the respective longer holding webs 13.1 are positioned at the level of the respective shorter holding grooves 14.2.

FIG. 3C shows this assembly step again together with the adjoining chain links 1, 2, 3, 4, in order to clarify that the path available for closing the block lock is limited due to the length and shape of the chain links. Already in this intermediate assembly step, both half-elements 10 with their insertion pins 11 and receiving pockets 12 are completely within the eyes of the adjacent ones Chain links 1, 2 positioned, wherein the chain links can remain in the extended course of the chain and do not have to be moved for the assembly of the block lock.

For the final joining of the half-elements 10, starting from the position according to FIGS. 3B and 3C, a last step-like movement is carried out, in which the half-elements 10 initially move longitudinally towards

Longitudinal extension of the chain strand are pressed together, pressed apart to cancel the temporary engagement of the long retaining webs 13.1 in the short retaining grooves 13.2, and then transversely, so that the position according to FIG. 3D is reached. From there, the half-elements 10 are brought into the end position by a final feed movement in the longitudinal direction.

The end position is shown in Figure 4. The long holding webs and holding grooves 14.1, 13.1 interlock as well as the short holding webs and holding grooves 14.2, 13.2. The center webs 10.2 lie against one another, so that two eyes 31, 32 separated from one another are formed. The ends of the eyes 31, 32 are each formed by the hook-shaped rounded inner flanks 18. The locking pins 20 used secure the position of the two

Half elements 10 to each other.

Claims

claims:

1. Block lock (100) for round steel chains,

with two half elements (10) which can be displaced relative to one another to open and close the block lock (100), each of which has ends connected to one another via a longitudinal web (10.1), one end of which has an insertion pin (11) with one opposite Longitudinal web of reduced width and retaining webs (13.1, 13.2) formed on both sides, at least two parallel retaining webs (13.1, 13.2) being arranged one above the other on each side; and of which the other end each has a receiving pocket (12) for receiving the insertion pin (11), on the two lateral inner flanks of which at least two holding grooves (14.1, 14.2) one above the other to form a toothing by receiving the retaining webs (13.1, 13.2) are formed, characterized in that

that from at least one longitudinal web (10.1) a central web (10.2) extends inwards to a longitudinal axis (L);

that the insertion pin (11), viewed in a side view, widens from the longitudinal web (10.1) towards its end and the length of the holding webs (13.1, 13.2) increases; and

that the receiving pocket (12), seen from the side, tapers from the longitudinal web (10.1) to its end and the length of the retaining grooves (14.1, 14.2) decreases.

2. Block lock (100) according to claim 1, characterized in that the insertion pin (11) has two retaining webs (7, 8) and the receiving pocket (12) has two retaining grooves (13, 14).

3. Block lock (100) according to claim 1 or 2, characterized in that the differently long holding webs (7, 8) and Holding grooves (14.1, 14.2) are arranged on the receiving areas formed by insertion pins (11) and receiving pockets (12), which are trapezoidal in cross-section, the insertion pin with the outwardly projecting retaining webs (7, 8) has a longer side at a parting plane and tapers towards the outer edge of the block lock towards the longitudinal web (10.1), and the receiving pockets (12), in the side flanks of which the retaining grooves (14.1, 14.2) are formed, the narrow side in each case in the parting plane and from there extend outwards towards the longitudinal web (10.1).

4. Block lock (100) according to one of the preceding claims, characterized in that the insertion pin (11) and the receiving pocket (12) of the half-elements (10) seen in a side view through outer edges (11.1, 12.1) and flanks (11.2, 12.2) are limited, which are aligned obliquely to the longitudinal axis (L).

5. Block lock (100) according to claim 4, characterized in that the insertion pin (11) and the receiving pocket (12) of the half-elements (10) seen in a side view by outer edges (11.1, 12.1) and flanks (11.2, 12.2) are limited , which are aligned at an angle of 60 ° to 85 ° to the longitudinal axis (L).

6. Block lock (100) according to one of the preceding claims, characterized in that the insertion pin (11) and the receiving pocket (12) are each provided with a transverse bore (17.1, 17.2) for receiving a securing element (20).

7. Block lock (100) according to one of claims 1 to 6, characterized in that the central web (10.2) on each half element (10) extends as far as the central axis of the block lock in such a way that after the half elements (10 ) a gapless central bridge is formed.

8. Block lock (100) according to one of claims 1 to 6, characterized in that a central web with a gap is formed after the half-elements (10) have been joined together.