DE102009007187A1 - Saw chain and chain saw equipped therewith - Google Patents

Abstract

The invention relates to a saw chain (14a) for a chain saw (10), in particular a sword saw (11), with a drive side (37) provided for driving by a pinion of the chain saw (10) and one for cutting workpieces (15) , the drive side (37) opposite cutting side (38), with by axle pieces (26) about mutually parallel pivot axes (42) pivotally connected, lined up chain links (25), each at least one between the drive side (37) and the cutting side ( 38) extending plate part (30, 31, 32a), wherein at least a part of the chain links (25) as cutting members (29a) is configured, on the cutting side (38) in front of a top (40) of the saw chain (14a) projecting cutting body (39a) having cutting edges (41a) for cutting the workpieces (15). In the saw chain (14a) it is provided that the cutting edges (41a) extend substantially at right angles to the pivot axes (42) of the axle pieces (26). The invention further relates to a chain saw (10) equipped with such a saw chain (14a).

Description

The Invention relates to a saw chain for a chain saw, in particular a sword saw, with one to a drive provided by a pinion of the chainsaw drive side and one intended for cutting workpieces, the Drive side opposite cutting side, with by axle pieces pivotally connected to each other about parallel pivot axes, to each other lined up chain links, each at least one between the drive side and the cutting side extending plate member comprise, wherein at least a part of the chain links as cutting members configured on the cutting side in front of an upper side of the saw chain protruding cutting body with cutting edges for cutting have the workpieces. The invention further relates a chain saw equipped with such a saw chain.

typical Saw chains are arranged one behind the other in a row direction arranged chain links, namely drive links, the Driving force transmitted from the pinion of the chain saw to the saw chain, cutting elements, which are seen for cutting the wood in front, and arranged therebetween Connecting links, the drive links and cutting elements hinged connect with each other. The respective chain links are around each other pivotable parallel pivot axes, what appropriate Achsstücke pivotally on the plate parts of the respective Chain links are articulated.

The cutting surfaces of the cutting members extend for an optimal cutting of wood substantially transversely to the row direction of the saw chain to saw a saw chain corresponding to the wide groove in the wood. Such a saw chain is for example off DE 695 25 076 T2 known.

In In practice, however, it has been found that such saw chains for soft materials, for example insulating materials, especially wood fiber materials are not optimally suited. The soft workpieces tear at the saw edges, so that exact cuts are not possible.

It Therefore, the object of the present invention is a saw chain for a chainsaw, especially a sword saw, to provide, with the softer materials, in particular Wood fiber materials can be sawn optimally.

To Solution to the problem is in a saw chain of provided in the aforementioned type that the cutting edges Chen in Wesentli perpendicular to the pivot axes of the axle pieces.

The Cutting edges of the cutting body thus essentially run parallel to the plate planes or in the plate planes. The pivot axes in turn, are perpendicular to the plate planes of the through the axle pieces connected respective plate parts. The cutting edges are in working direction the saw chain effective.

Cut according to the invention the cutting edges, however, unlike the prior art not essentially or exactly parallel to the pivot axes in the Workpiece, but substantially perpendicular thereto. As a result, exact cuts in soft workpieces, such as wood fiber boards readily possible.

Especially it is preferred if all cutting edges of the cutting members the saw chain in accordance with the invention are designed.

A advantageous embodiment of the invention provides that the cutting edges exclusively at right angles to the swivel axes of the axle pieces run. In other words, the cutting edges run exclusively parallel to the plate planes, if these in turn perpendicular are to the pivot axes. In principle, it would be possible, slightly inclined cutting edges or at least partially obliquely inclined cutting edges to allow, it is advantageous if the cutting edges in according to the invention exclusively perpendicular or substantially perpendicular to the pivot axes the axle pieces run.

Of the or the cutting body expediently Make a blade on or form one upwards in front of the top the saw chain protrudes. The blade is beneficial in the Type of knife blade designed, d. H. relatively thin, what makes exact cuts possible.

At least a portion of a cutting edge expediently extends along between adjacent to the respective cutting member Chain links and stands up in front of the top of the saw chain in front. This can of course be for all Cutting body of all cutting elements apply.

Of course can also at least sections of a cutting edge for in the pulling direction during operation of the saw chain next Be addressed chain link or against the pulling direction, so to speak directed towards the rear chain link.

Also the combination of all the aforementioned variants is without Another feasible, for example, the first two later still described embodiments.

At least one cutting edge extends expediently from one longitudinal end to the other longitudinal end of the respective cutting member. The cutting edge can for example be rectilinear.

Prefers it is, if at least one cutting edge, expediently all cutting edges of a respective saw chain, a curved, for example have arcuate course. In the aforementioned variant, namely that cutting edges both to the anticipatory as are also addressed subsequent chain link and continue the Cutting edge also forward, in front of the top of the saw chain protrudes, a bow-shaped, in a first embodiment Below described course be approximately semicircular.

Of course is also a trapezoidal course, as in a second Implementation realized, possible. About that In addition, combinations of curved and angled courses are also possible a cutting edge readily feasible.

At least a cutting body expediently a reinforcement bead. The bead runs expediently essentially in the row direction the saw chain, d. H. from the previous chain link in the direction of the subsequent chain link with respect to Cutting body.

At least a cutting body is expediently by a cutter plate pivotally connected to an axle piece formed of the respective cutting member or is on this cutting plate part arranged. The cutting plate part, in turn, is expediently pivotable or rotatable with a respective axle piece and thus connected to the subsequent chain link, for example a drive member or more preferably, a link.

the Cutting plate part is advantageously a cutting-free plate part opposite the respective cutting member. The cuttingless Plate part, for example, a plate part, otherwise also at Connecting links is used.

The Cutting plate parts of two in particular in the row direction of the saw chain lie behind one another arranged chain links or cutting members suitably opposite to each other Opposite sides of the respective non-cutting plate parts, so that between the successive follow the cutting-plate parts a transverse distance transverse to the row direction of the saw chain exists is. This will make a cut approximately corresponding to a transverse width the saw chain sawed into the workpiece. This measure allows very precise cuts.

The Cutting elements are expediently between Arranged drive elements.

Between two cutting members are expediently two Arranged by cuttingless links connecting drive members, so that not every chain link is a cutting member.

The The invention further includes a chain saw, more preferably a sword saw, with an inventive Saw chain is equipped.

following Embodiments of the invention with reference to the drawing explained. Show it:

1 a transverse view of a chainsaw with a saw chain according to the invention, in

2a in perspective oblique view and in

2 B is shown in side view,

3a a second embodiment of a saw chain according to the invention in a perspective oblique view, the in

3b is shown in side view,

4a a third embodiment of a saw chain according to the invention in a perspective oblique view, the in

4b is shown laterally.

A chainsaw 10 is as a sword saw 11 designed. The sword saw 11 has a down in front of a guide plate 12 leading guide sheet 13 for guiding a saw chain 14a located in a lower, curved deflection section of the guide blade 13 is shown only schematically, but at the substantially rectilinear sections the detailed representations according to 2a . 2 B equivalent. The guide sheet 13 is, for example, a so-called sword. The guide plate 12 can also be referred to as a saw table, which is to be placed on a schematically illustrated workpiece 15 suitable. The guide plate 12 is with respect to a housing 16 the chainsaw 10 swiveling, for which adjusting devices 17 are provided. This allows the sword saw 11 also obliquely inclined, exact cuts in the workpiece 15 bring in and is at the same time easy to handle.

Inside the case 16 is a drive 18 arranged, preferably an electric motor, over a drive wheel 19 or drive pinion the saw chain 14a drives.

Of course, a saw chain according to the invention, for example, the saw chain 14a be used in other chainsaws, even those that have no guide plate or a guide table.

An operator can conveniently operate the chainsaw on a front or rear handle 20 . 21 take that on the guide plate 12 are arranged and further on a handle 22 of the housing 16 at which a power switch 23 for switching the drive on and off 18 is arranged. Thus, the operator can use the chainsaw 10 comfortably in working direction A (indicated by an arrow) lead. Regarding the working direction A behind the guide sheet 13 , ie the sword, is still a chain guard 24 arranged behind the guide sheet 13 or below it runs.

With the help of the saw chain according to the invention 13a can the sword saw 11 exact cuts in the workpiece 15 Einbrin conditions, even if this is a relatively soft material, such as a fiber material, in particular a wood fiber material. The details on the saw chain 13a The measures envisaged are best 2a . 2 B For the following description concerning the first embodiment ( 2a . 2 B ) are used with the index a, for the further embodiments according to 3a . 3b such as 4a . 4b the additional indices b and c. The same components have reference numerals without additional lowercase letters.

The saw chain 14a has as well as the alternative to this on the chainsaw 10 usable saw chains 14b and 14c in a row direction R successively arranged chain links 25 , each by axle pieces 26 are pivotally connected to each other.

The chain links comprise at each of the saw chains 14a . 14c drive members 27 , Connecting links 28 as well as individually designed cutting elements 29a . 29b . 29c ,

The axle pieces 26 pierce shoot plate parts 30 the shoot members 27 , Connecting plate parts 31 and the links 28 as well as cutting plate parts 32a . 32b and 32c the cutting members 29a . 29c , the cuttingless plate parts 33 the cutting members 29a . 29c are opposite. The axle pieces penetrate each of the plate parts 30 - 33 provided holes, but only in the drive plate parts 30 are visible.

The shoot plate parts 30 point down in front of a bottom 35 the saw chains 14a . 14c projecting protrusions 36 on, which are intended in particular for carrying oil. The bottom 35 is also a driving side 37 at the drive wheel 19 in the saw chain 14a . 14b or 14c intervenes.

The drive side 37 is a cutting side 38 the saw chain 14a . 14c opposed, on the cutting body 39a . 39b and 39c in front of a top 40 the saw chain 14a . 14b . 14c protrude.

Between the cutting links 29a . 29b and 29c is in each case a link 28 arranged. A connecting link 28 connects two drive elements each 27 , Likewise, the cutting links connect 29a . 29c two drivers each 27 in the nature of the links 28 , Thus, therefore, between two successive cutting members 29a or 29b or 29c each a link 28 as well as two drive links 27 arranged. Between two respective cutting members 29a . 29b and 29c So it's a seamless link 28 arranged.

At the cutting members 29a - 29c is still to be noted that the cutless plate parts 33 identical in shape and identical to the likewise cutless connection plate parts 31 are, so that following a common part principle is given a simple construction.

Furthermore, the cutting body 39a . 39c with respect to the row direction R, in each case alternately arranged once on the left side and once on the right side one behind the other, one blanked plate part in each case 33 the cutting bodies 39a . 39b and 39c opposite. Thus, so to speak, on the outside of the saw chain 14a . 14b or 14c alternately a cutting body 39a . 39b or 39c available.

Of course, in the row direction R between the respective cutting bodies 39a . 39c be larger distances, ie, for example, several cut-free links 28 be arranged. Furthermore, unlike the exemplary embodiments, it is possible for a respective cutting member to have only a single, for example, central cutting plate part. You can imagine that, for example, up in front of the drive plate parts 30 each projecting a cutting body.

Another variant is it, for example, if each two cutting body 39a . 39c are arranged opposite one another on one and the same cutting member. Thus, a pairwise cut is carried out, so to speak, parallel to the longitudinal direction or row direction R of the respective saw chain. Thus, for example, a Vor shearing speed of the chainsaw 10 when cutting in particular particularly soft workpieces 15 increase.

The cutting edges 41a . 41b run at right angles to swivel axes 42 the axle pieces 26 ,

The cutting edges 41c the saw chain 14c are not quite, but essentially perpendicular to the pivot axes 42 because the cutting body 39c a reinforcement bead 43 exhibit. Anyway, most of the cutting edge is 41c perpendicular to the respective pivot axis 42 ,

The pivot axes 42 for their part run at right angles to plate planes 44 the plate parts 30 - 32 At least where the axles are 26 the respective plate parts 30 - 33 penetrate. Thus, the cutting edges run 41a . 41c in another formulation substantially parallel or exactly parallel ( 41a . 41b ) to the plate planes 44 ,

The cutting body 39a . 39b Form blades that face up in front of the top 40 the saw chains 14a or 14b protrude. Thus, the two saw chains 14a . 14b with knife-like or knife blade-like cutting bodies 39a . 39b fitted.

The cutting edges 41a . 41b and 41c each have sections 45 to Z in the pulling direction during operation of the saw chain 14a . 14c next chain link 25 are directed.

At the saw chains 14a and 14b the cutting edges run 41a . 41b also transversely between each adjacent chain links 25 and stand up in front of the top 40 the respective saw chain 14a . 14b in front. So that's a section 46 the cutting edge 41a or 41b directed upwards. This cuts the saw chain 14a or 14b with respect to the working direction A directed forward in the workpiece 15 which increases the working speed with a precise cut at the same time.

Not necessarily in itself, but it is appropriate that the cutting edges 41a and 41b also sections 47 have, which counter to the pulling direction Z during operation of the saw chain 14a . 14b next chain link 25 are directed.

While the cutting edges 41a have a continuous linear course, namely in the present case a curved course, are the cutting edges 41b polygonal, trapezoidal in the embodiment.

The upper cutting edges 41a . 41c each extend from the front in the pulling direction Z longitudinal end 51 to the trailing Z in the direction Z rear 52 of the respective cutting member 29a . 29b ,

The cutting body 39a stand semicircular upwards in front of the top 40 the saw chain 14a in front.

The cutting edges 41b with their trapezoidal course are in the form of trapezoids up in front of the top 40 the saw chain 14b in front.

The sections 45 and 47 are inclined with respect to the pulling direction Z and counter thereto.

Also the sections 45 the cutting edges 41c the saw chain 14c are inclined, with the inclined slope of the preceding chain link 25 runs away. Also the reinforcement beads 43 run obliquely, namely obliquely with respect to a plane in which the pivot axes 42 a respective cutting plate part 32c run. The skew angle is such that the reinforcement bead 43 from the top 40 fro obliquely down closer to the pivot axis 42 extends, above which the reinforcing bead 43 is arranged. It has to be said that the cutting bodies 39c essentially above the rear in the pulling direction Z pivot axis 42 or the rear axle piece 26 upwards in front of the top 40 extend.

In the area of reinforcement beads 43 the cutting edges run 41c So partially inclined with respect to the plate planes 44 or not exactly perpendicular to the pivot axes 42 , However, it should be noted that the largest, upwardly projecting portion of the cutting edges 41c namely a section 48 , perpendicular to the pivot axes 42 runs. Because essentially the sections 48 furthest up in front of the top 40 protrude, are the sections 48 during operation of the saw chain 14c so to speak, the effective cutting edge portions, while those further down, partly with respect to the pivot axes 42 inclined sections 53 that are in the area of reinforcement beads 43 when cutting the workpiece 15 are not or only slightly effective.

Apart from the cutting edge 41c are the cutting bodies 39c dull, ie upper sections 49 as well as rear, to follow in the pulling direction Z chain link 25 directed sections 50 have no cutting edge or cutting feature. The upper sections 49 are to that in the sense of reinforcing beads 43 obliquely inclined, in this case even parallel. This ensures that essentially the cutting edges 41c with the workpiece 15 are engaged while the upper and rear sections 49 . 50 the cutting body 39c so to speak from the cutting edge 41c cleared area during operation of the saw chain 14c duri fen and thus with the workpiece 14 are not engaged.

In an alternative formulation, one could also say that the cutting edges 41a . 41c essentially or even exclusively ( 41a . 41c ) in a circumferential plane of the respective saw chain 14a . 14c run.

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 69525076 T2 [0003]

Claims (16)

Saw chain for a chainsaw ( 10 ), in particular a sword saw ( 11 ), with one to a drive through a pinion of the chain saw ( 10 ) provided drive side ( 37 ) and one for cutting workpieces ( 15 ), the drive side ( 37 ) opposite cutting side ( 38 ), with axle pieces ( 26 ) about mutually parallel pivot axes ( 42 ) pivotally connected, lined up chain links ( 25 ), each at least one between the drive side ( 37 ) and the cutting side ( 38 ) extending plate part ( 30 . 31 . 32a ; 32b ; 32c ), wherein at least a part of the chain links ( 25 ) as cutting members ( 29a ; 29b ; 29c ), which on the cutting side ( 38 ) in front of a top ( 40 ) of the saw chain ( 14a ; 14b ; 14c ) projecting cutting bodies ( 39a ; 39b ; 39c ) with cutting edges ( 41a ; 41b ; 41c ) for cutting the workpieces ( 15 ), characterized in that the cutting edges ( 41a ; 41b ; 41c ) substantially perpendicular to the pivot axes ( 42 ) of the axle pieces ( 26 ). Saw chain according to claim 1, characterized in that the cutting edges ( 41a ; 41b ; 41c ) exclusively at right angles to the pivot axes ( 42 ) of the axle pieces ( 26 ). Saw chain according to claim 1 or 2, characterized in that at least one cutting body ( 39a ; 39b ; 39c ) forms or has a blade facing upwards ( 40 ) of the saw chain ( 14a ; 14b ; 14c ) protrudes. Saw chain according to one of the preceding claims, characterized in that at least one section ( 46 ) a cutting edge ( 41a ; 41b ; 41c ) longitudinally between to the respective cutting member ( 29a ; 29b ; 29c ) adjacent chain links ( 25 ) and up in front of the top ( 40 ) of the saw chain ( 14a ; 14b ; 14c ) protrudes. Saw chain according to one of the preceding claims, characterized in that at least one section ( 45 ) a cutting edge ( 41a ; 41b ; 41c ) in a pulling direction (Z) during operation of the saw chain ( 14a ; 14b ; 14c ) next chain link ( 25 ). Saw chain according to one of the preceding claims, characterized in that at least one section ( 47 ) a cutting edge ( 41a ; 41b ; 41c ) against a pulling direction (Z) during operation of the saw chain ( 14a ; 14b ; 14c ) next chain link ( 25 ). Saw chain according to one of the preceding claims, characterized in that at least one cutting edge ( 41a ; 41b ; 41c ) from a longitudinal end ( 51 ) to the other longitudinal end ( 52 ) of the respective cutting member ( 29a ; 29b ; 29c ). Saw chain according to one of the preceding claims, characterized in that at least one cutting edge ( 41a ) has a curved, in particular arcuate, course. Saw chain according to one of the preceding claims, characterized in that at least one cutting edge ( 41b ) has a polygonal, in particular trapezoidal, course. Saw chain according to one of the preceding claims, characterized in that at least one cutting body ( 39a ; 39b ; 39c ) a reinforcing bead ( 43 ) having. Saw chain according to one of the preceding claims, characterized in that at least one cutting body ( 39a ; 39b ; 39c ) by one with an axle piece ( 26 ) articulated verbun denes cutting plate part ( 30 . 31 . 32a ; 32b ; 32c ) of the respective cutting member ( 29a ; 29b ; 29c ) or on the cutting plate part ( 32a ; 32b ; 32c ) is arranged. Saw chain according to claim 11, characterized in that the cutting plate part ( 32a ; 32b ; 32c ) a cutting-free plate part ( 33 ) of the respective cutting member ( 29a ; 29b ; 29c ) is opposite. Saw chain according to one of the preceding claims, characterized in that the cutting plate parts ( 32a ; 32b ; 32c ) of two in particular directly in the row direction (R) of the saw chain ( 14a ; 14b ; 14c ) arranged behind one another cutting elements ( 29a ; 29b ; 29c ) alternately on opposite sides of the respective non-cutting plate parts ( 33 ) such that between the cutting plate parts ( 32a ; 32b ; 32c ) a transverse distance transversely to the row direction (R) of the saw chain ( 14a ; 14b ; 14c ) is available. Saw chain according to one of the preceding claims, characterized in that the cutting members ( 29a ; 29b ; 29c ) between drive elements ( 27 ) are arranged. Saw chain according to one of the preceding claims, characterized in that between each two Schneidglie countries ( 29a ; 29b ; 29c ) two through non-cutting links ( 28 ) connected drive elements ( 27 ) are arranged. Chainsaw ( 10 ), in particular a sword saw ( 11 ), with a saw chain ( 14a ; 14b ; 14c ) to one of the preceding claims.