FI128970B - Apparatus for use of chain - Google Patents

Abstract

The object of the invention is a device for chain use, to which belongs firstly a chain, which is formed by moldings (1), which are to be connected one after the other with guide pins in conduit points in conduit parts (1b) present at opposite ends. The device, on the other hand, comprises a utility device, to which belongs at least one sprocket, wherein a support surface (1k) at the center part (1a) in a molding (1) belonging to the chain comprises an opening (2), which is arranged substantially transversely in relation to the direction of movement of the chain, which opening is, when the chain is moved, in cooperation with abutment surfaces belonging to the sprocket (7), which are arranged according to the chain's successive openings (2) and substantially transverse in relation to the direction of movement of the chain. Each abutment surface comprises a puller present in the sprocket, which, when viewed in the transverse direction, has two or more parallel projections, the diameter of which is substantially larger than the diameter of the stem part of the puller. In connection with the opening (2) of the molding, one or more enlarged abutment openings (2 ') are provided for one or more protrusion parts in order to realize mutual force transmission between the sprocket and the moldings (1) by cooperation of the said protrusion part and the abutment opening (2').

Description

The invention relates to an apparatus for chain drive according to the preamble of the independent claim.

In a conventional chain structure, the transmission for driving the chain is usually transmitted by a standardized drive wheel for its tooth shapes. In this respect, a more advanced chain structure is previously known, for example, from Finnish patents FI 64707 and FI 101098. in the vicinity of the second joint. In this case, when the chain is folded onto the drive wheel, an advantageous lever arm is formed, due to which the chain force acting on the chain structure presses the chain openings more firmly against the pulleys of the drive wheel. This solution significantly reduces the so-called. jumping. In addition, thanks to the lever arms formed, the chain structure easily detaches from the drive wheel on the return side, whereby its so-called inclusion is prevented. O The chain structure according to patent FI 64707 has proved to be significantly better in practice than previous corresponding solutions z, in particular due to the lever arms N 25 provided therein. However, in certain applications, such as chain structures used in water treatment plants, it has been necessary, for example to reduce corrosion and the specific gravity of the chain, to switch to plastic or similar non-metallic N materials. In this case, in certain operating environments,

such as under particularly acidic conditions, problems have been identified with the durability of the plastic material of the moldings. On the other hand, patent FI 101098 discloses an improvement, in particular with regard to the longitudinal chain deflection of the pivot pins, which is minimized by the use of pivot pins which are uniformly longitudinally and expand in cross section at one end. By continuing to use, for example, continuously conical pivots, the surface pressures can be optimized in all situations so that, in principle, the deflection of the chain is eliminated even almost completely. In addition, by using such pivot pins, it is possible to facilitate the assembly of the chain due to the steering effect of the conical pivot pin.

Finnish patent 100202 further discloses a method and a sprocket for chain drive, the invention being based on the fact that the articulation formed by the mating surfaces of the sprocket, such as pins or the like, is changed by a control arrangement by moving them on the sprocket to one or more circumferential diameters. to the perimeter. Thanks to the present invention, it is possible to significantly increase the service life of the chain despite its elongation. S 25 ™ ~ The tensile strength and bending stiffness of the shaped bodies have been improved in the conventional way by increasing the material strength of the shaped bodies at their opening on the opposite side of the bearing surface, which is not optimally feasible in all cases in terms of chain drive functionality. This is due, firstly, to the fact that the increase in the distance from the back of the shaped body to the definition of the chain pins

from this center line produces problems especially in controlling the flow of the chain and controlling its flow, i.e. e.g. in the operation of chain guards. On the other hand, the depth of the opening in the shaped body is most preferably arranged to extend substantially in the center line of the chain, which enables optimal power transmission between the sprocket driving the chain and the shaped bodies of the chain. In this way, both the optimal structure of the chain in terms of strength and its operation without additional rocking and vibration are made possible.

Furthermore, the patent FI 124948 discloses an apparatus for chain drive, in which one or more extended mating openings for one or more projections are arranged in connection with the opening of the shaped body used. In this case, the shaped body is arranged to be reinforced by a uniformly continuous thickening arrangement projecting from the bottom of the opening and uniformly at the opening in the longitudinal direction.

The object of the apparatus according to the present invention is to provide a decisive improvement to the problems described above and thus to substantially increase the state of the art. In order to achieve this purpose, the apparatus according to the invention is essentially characterized by what is stated in the characterizing part of the dependent claim.

Tr a - The main advantages of the apparatus according to the invention are the simplicity and reliability of both the chain use it allows and the constructions suitable for it, whereby the strength properties of the shaped parts forming the chain and the operation of the chain formed by them are optimized while minimizing material consumption.

Since in existing solutions it is most advantageous to arrange the depth of the opening of the shaped body in the shaped body to extend substantially to the center line of the chain, which enables optimal power transmission between the sprocket using the chain and the shaped parts of the chain, one or more openings in connection with the opening can be used in the invention. instead, the mutual transmission of power between the drive wheel and the moldings realizes a mating surface arrangement by the co-operation of the cantilever portion of each traction piece and the expanded mating opening in the moldings.

In this case, the opening of the shaped body does not have to extend to the center line of the chain, to which, in turn, the extended counter-opening can be extended without problems.

By minimizing the transverse opening in the body of the shaped body, it is further possible to optimize the breaking strength of the shaped body by optimizing its cross-sectional structure, e.g. especially when using plastic composite materials by orienting the fibers used therein in the desired way.

The invention thus makes it possible to extend the extended counter-opening substantially to the center line of the chain without the need to disproportionately spaced the back surface of the shaped body relative to the back surface N of the "gapless" part of the shaped body.

In this case, also due to the prevention of chain vibration, it is possible to significantly increase the service life of the chain drive S 25. xa - When the chain drive operates in accordance with the invention with the co-operation of the protrusion of each traction piece S and the expanded counter-opening 2 in the molding, the power transmission surface between the above parts is significantly wider than in existing solutions, which significantly reduces the number of molding and traction. snow. On the other hand, the co-operation of the protruding parts of the traction pieces and the expanded mating openings of the shaped bodies also provides a significant chain-controlling effect, which facilitates the smooth operation of the chain and without vibration.

In connection with the invention, it is also possible to utilize an arrangement for detecting the elongation of the chain, e.g. functional implementations. In this connection, as a further preferred embodiment, in order to increase the service life of the chain, the sprocket also comprises an adjustment arrangement for maintaining the desired tension of the chain of shaped parts despite the elongation of the chain.

Other preferred embodiments of the apparatus are set out in the dependent claims for the apparatus according to the invention.

NN In the following description, the invention will be illustrated in detail with reference to the accompanying drawings, in which xa - Figures 1a to 1d S show a shaped body of a chain belonging to a preferred apparatus 2 according to the invention in a perspective view towards the edge of its opening. , as a front view from its bearing surface

Figures 2a to 2c show a preferred drive wheel drive for use with the mold according to Figures 1a to 1c, Figures 3a and 3b show a perspective view of the folding of the mold parts of the chain belonging to the apparatus according to the invention, the side view and the perspective view towards the trailing edge of its opening. an enlarged detail thereof, and Figure 4 shows a side view of the folding of the shaped parts of the chain belonging to the apparatus according to the invention onto the sprocket.

The invention relates to an apparatus for chain drive, which comprises a chain, such as a transmission, conveyor chain and / or the like, consisting of: articulation points 4, 5 at articulation portions 1b at opposite ends and form pieces 1 connected in series with articulation pins. S 25 The first articulation point of the articulation parts 1b is arranged ™ ~ in a uniformly projecting arrangement 4 narrower than the width L of the central part 1a of the shaped body and the second articulation point 5 in a fork arrangement 5, each articulation point 4, 5 having holes 6 to form a continuous chain 2 30 by placing the cantilever arrangement 4 N of the previous shaped body in connection with the fork arrangement 5 of the next shaped body by means of an overlap joint and by placing a pivot pin in the hole 6.

the apparatus further comprises a drive arrangement comprising at least one sprocket 7, such as a traction, folding wheel or the like, wherein the bearing surface 1k in the central part 1a of the chain shaped part 1 comprises an opening 2 arranged substantially transversely to the chain travel direction s, which is when the chain is moved in co-operation with abutment surfaces 9 belonging to the sprocket 7, arranged in succession openings 2 of the chain and substantially transverse to the direction of travel of the chain. Each abutment surface 9 comprises a traction piece on a sprocket 7 having, viewed in the transverse direction p, one or more parallel projections, the diameter D1 of which is substantially larger than the diameter d1 of the base part of the traction piece. With particular reference to Figures 1a to 1d, one or more extended mating openings 2 'for one or more projections 9' are provided in connection with the opening 2 of the molded part, to facilitate transmission between the sprocket 7 and the moldings 1 as shown in Figures 3a, 3b and 4. 'and counter gap 2'.

In particular, the traction piece according to Figures 2a to 2c, = with protruding parts 9 at its opposite ends N connected to the base part 9, provides a very effective effect of controlling the travel of the S 25 chain in connection with the sprocket, mahdollista ~ enabling optimal power transmission without vibrations.

The apparatus according to the invention further comprises an arrangement 2 30 Y for detecting the elongation of the chain after the mutual release point of the chain shaped body 1 N opening 2 and the basic part 9 ”of the traction piece 9 of the sprocket 7 has moved as shown in Fig. 1d.

at the trailing edge of the opening of the shaped body 2j at a distance e from the corresponding release point of the unstretched chain. The elongation detecting arrangement Y is implemented as shown in Figs. 1b to 1d by an indicator member at the trailing edge 2j of the opening of the mold body 1 at a distance ej from the corresponding release point of the unstretched chain. In Figures 1a to 1d, the dimensions of the solutions related to the above-described function have been intentionally increased for the sake of clarity, because in practice the maximum allowable elongation for a chain is typically about 0.75 to 1.5 mm, and especially for toothed chains 1 to 4 mm.

In this case, especially with reference to the application shown in the above-mentioned figures, which is most advantageous in practice, the elongation-detecting arrangement Y is implemented by a mechanical indicating member Y1 which, when it hits the base part 9 ”of the traction body 9, causes a visually visible mark on its surface. In connection with the above, the elongation detecting arrangement Y preferably comprises, for example, a base part 9 ”coated with a color different from the basic color of the traction piece 9, whereby physical contact of the indicating member Y causes a change in the color of the base part 9”. The indicating element S 25 can then be, for example, a file-like insert at the trailing edge 25 of the opening.

Tr a - A further preferred embodiment of the apparatus according to the invention is that the opening 2 2 30 of the shaped body 1 belonging to the chain is arranged in connection with the first articulation point 4 of the shaped body. In this connection, a further preferred embodiment, with particular reference to Fig. 1d, is

the end angle PK of the back surface 1s of the body is rectangular, which, when folded on the drive wheel of the chain, increases space for e.g. the use of a chain guard KV of the type shown in Fig. 4, etc. purpose.

As a further preferred embodiment, with particular reference to Figures 3a, 3b and 4, the sprocket 7 comprises, in order to increase the service life of the chain, an adjustment arrangement 7a for maintaining the desired tension of the chain of shaped parts 1 despite the chain elongation. This makes it possible to significantly increase the service life of the chain by moving the traction pieces 9 to the next wider circumference of the sprocket as a result of the detected elongation of the chain.

As a further preferred embodiment of the invention, with particular reference to Figures 2a-2c and 3a and 3b, the traction body 9 comprises a surface structure c rotatably connected to a shaft b fixedly connected to the side plates a of the sprocket 7, such as plain bearing or the like. As an alternative to the above, the traction piece 9 may also comprise a surface structure c arranged on a shaft rotatably connected to the side plates a of the sprocket 7, such as a plain bearing or the like.

& S 25 Em. the surface structure c is made of, preferably a plastic, ™ ~ rubber or silicone-based, wear-resistant, strong and a material chemically resistant to the conditions of use. Ko. the part structure can be completely uniform S or it can consist, for example, of separate parts made of different manufacturing materials.

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The shaped bodies 1 of the chain according to the invention are made in particular of the material best suited to the particular conditions of use, i.e. preferably e.g. a plastic-based composite material, such as reinforced plastic, ceramic material and / or the like. Instead of / in addition to glass fiber, e.g. carbon fiber, aramid fiber and / or natural fibers can be used as the fibrous material in the reinforcing plastic. The strength of the components included in the arrangement can then be adjusted by controlling the orientation of the fibers in the manufacture of the composite material. As the binders, for example, polyester resin or epoxy resin can be used. It is also possible to make moldings from metal, light metals or to utilize metal and / or stone, etc. in the composite material.

Depending on the application of the apparatus according to the invention, it is possible to manufacture the various components belonging to it from different manufacturing materials, such as joint pins made of carbon fiber and moldings made of glass fiber, etc.

Depending on the application and conditions of the equipment to be manufactured, N thermoplastics, such as main plastic (PE, PP), engineering plastic S 25 (PET, PMMA, PC, PA, POM, ABS + PC), can be used as the plastic used in the manufacture of the components. special plastic (PTFE), ™ ~ or thermosetting plastic (PUR, UP, EP, VE, PF, MF / AF), etc. xa - It is clear that the invention is not limited to the applications S or described above, but can be modified as required by the respective applications. Thus, it is firstly clear that the components utilized in the invention can be manufactured as described above from a wide variety of materials, utilizing a wide variety of manufacturing techniques. On the other hand, the pulling openings in the moldings can also be placed differently from that shown, e.g. in connection with the so-called pulling articulation part of the moldings or more centrally on the bearing surface of the central part of the moldings. Accordingly, each drive member of the drive wheel may have only one or more protruding portions. It is also possible to manufacture the articulating pins connecting the shaped pieces, e.g. from suitable materials, so that they have some degree of fastening arrangement enabling snap-locking already in place, etc.

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Claims (8)

Claims: An apparatus for chain drive, comprising a chain, such as a transmission, conveyor chain and / or the like, comprising: articulation points (4, 5) in their articulation portions (1b) at opposite ends of form pieces (1) connected in series with articulation pins, wherein the first hinge point of the velcro parts (1b) is arranged as a cantilever arrangement (4) substantially narrower than the width (L) of the central part (1a) of the mold body and the second hinge point is arranged as a fork arrangement (5), each hinge point (4, 5) having holes (6) a cantilever arrangement (4) of the previous molding in connection with the fork arrangement (5) of the next molding by overlapping and inserting a pivot pin in the hole (6); and a drive arrangement comprising at least one sprocket (7), such as a traction sheave, a folding sprocket or the like, wherein the bearing surface (lk) in the central part (1a) of the chain shaped part (1) comprises a chain substantially transverse to the running direction (s) an opening (2) arranged in cooperation with successive chain openings (2) = belonging to the sprocket (7) when the chain is moved and with abutment surfaces (9) arranged substantially N transversely to the direction of travel of the chain, S 25 each abutment surface (9) comprises a traction piece on a sprocket (7) on ~ having one or more parallel projections (97) viewed in the transverse direction (p) E, - having a diameter (D1) substantially larger than the diameter (d1) of the base portion (97) of the traction piece, and, wherein one or more N extended mating openings (27) are arranged in connection with the opening (2) of the shaped body, characterized in that the apparatus has an arrangement (Y) for detecting the elongation of the chain the mutual release point of the opening (2) of the chain molding (1) and the base (97) of the traction piece (9) of the sprocket (7) at the trailing edge (27) of the opening of the molding away from (e) the corresponding release point of the unstretched chain; Y) is provided at the trailing edge (27) of the opening of the shaped body (1) at a distance (e) from the corresponding release point of the unstretched chain, which, when hitting the base part (97) of the traction piece (9), detects chain elongation. Apparatus according to claim 1, characterized in that the elongation detecting arrangement (Y) is provided by a mechanical indicating member (Y1) which, when it hits the base part (97) of the traction piece (9), causes a visually visible mark on its surface. Apparatus according to claim 2, characterized in that the elongation detecting arrangement (Y) comprises a base part (97) coated with a color different from the basic color of the traction body (9), the contact of the indicating member (Y1) causing a change in the color of the base part (97). . N N Apparatus S 25 according to one of the preceding claims 1 to 3, characterized in that the opening (2) of the shaped body (1) belonging to the chain is arranged in connection with the first joint point (4) of the shaped body. S Apparatus according to one of the preceding claims 1 to 4, characterized in that the sprocket (7) comprises N adjustment arrangements (7a) for maintaining the desired tension of the chain of shaped parts (1) despite the elongation of the chain. Apparatus according to one of the preceding claims 1 to 5, characterized in that the traction body (9) comprises a surface structure (w) rotatably connected (w) to the shaft (b) fixedly connected to the side plates (a) of the sprocket (7), such as plain bearing or the like. c). Apparatus according to one of the preceding claims 1 to 5, characterized in that the traction body (9) comprises a surface structure (c) arranged on a shaft rotatably (w), such as a plain bearing or the like, on a side wheel (a) of a sprocket (7). Apparatus according to claim 6 or /, characterized in that the surface structure (c) is made, preferably of plastic, of a rubber- or silicone-based, wear-resistant, strong and chemically resistant to the conditions of use. OF O OF N <Q PP I Jami a T O O O O OF