DE3114906A1 - Hand-held motor-driven chain saw - Google Patents

Abstract

The object of the invention is to improve hand-held motor-driven chain saws such that the housing equipped with the carrying and operating elements is able to remain in the same basic position in each cutting direction; this results in a high degree of operating and functioning safety, since the carrying and operating elements can be optimally adapated and designed; due to the changeable fitting of the handle on one side, easy adaptation for either right- or left-hand use is possible. The cutting direction is adjusted by turning the chain blade or the chain on the housing about the blade longitudinal axis. In this case, the connecting shaft between the motor housing and the chain drive can be the axis of rotation, or the entire unit, consisting of motor, chain drive and blade, is rotatable in the housing. A particularly simple and well-arranged design results when the motor is installed in the longitudinal direction of the blade connected to the worm gearing between motor and chain. <IMAGE>

Description

P 31 Ik 9D6.5

31U906

Patent application
Hand-motor chainsaw

The invention relates to an improvement on hand motor set = saws, which expand the range of application while at the same time making handling easier and increasing work safety is achieved.

Hand chain saws are usually two-handed fitted. The rear, operator-side handle enables = light controls the machine and contains the switches and Control elements for the drive, for safety reasons usually in the form of a two-button release to prevent unintentional = intentional switching on; Switch with continuous operation Uerrie = are not permitted with these devices. The second handle essentially serves as a carrying handle and is therefore arranged as precisely as possible above the center of gravity of the entire device, including the sword and chain, as well as the motor. There the engine is the heaviest part of the chain saw, it turns out practically the position of the handle above the engine close to the = lower end of the chain. Against this exposed position of the handle, it must be given a hand guard or a protective cap, which prevent reaching through with the hand to the chain and at the same time protection against pieces of wood thrown around should offer, but on the other hand must also allow safe handling of the machine with coarse gloves.

Chainsaws are always operated in such a way that the lower,

towards the machinist! "mm -.cf avoids, r: d-: B the machine when saying warn and n; ach c'jen υ cn ^: " -i3scr \ i - i th fart is pulled when. cuts perpendicular run by acen nsci below; For the same reason, horizontal cuts can only be made from right to left:

uerden, provided that the machine can still be held securely in your lnqs. For this reason it has already been suggested that the handle should be designed as a carrying handle vein Ulinkeigri ^p f 3u == so that the machine can also be operated with a horizontal chain dz ...

Sword] age to hold.

Vertical cuts from bottom to top or horizontal cuts from left to right ···? are only possible in one position of the machine in which the center of gravity of the Marc ~ i => ne is above the handle. Undoubtedly Uird dadurc ^h

IfO holding security and thus the operational safety affected ^ "= 'tigt.

This negative effect occurs to a greater extent bsi Motor = Chainsaws come to light in which the engine is side-by-side with the Axis perpendicular to the chain or sword plane attached i ^ t;

L> 5 al-j carrying handle is usually a simple stick, de- ^ e-. Axis parallel to the Motarach: h · lierjt. After that, the center of gravity lies at a certain distance from the value level, so that when the saw chain hits an obstacle, moments can occur which would make it impossible to stop the machine

5D .ren. This applies in particular to the execution of 5chnitt = n, which are not guided vertically from top to bottom, and to heavier devices. This arrangement is the same · "·! Never = given because it enables a particularly simple structure of the gearbox between the motor and chain, although it does not allow the carrying and guiding hands to be interchanged (left-handed people).

This guard part is lessened with chainsaws. Dei .l & -. £ - °. : e: Motor .. focus in the üchuKrtebenß iat, -jc-iurL ¹¹ -ir a correspondingly symmetrical position of the two handles? .t - r

6G sword axis results; the Motarwel. Ie can be τ: επκτβζ-.ζ z ~~

BATH ORIGINAL

31H906

level lying oiler n.tr iJ Llh. '<ur j-: h .mr '.i-'irrj j-: M ■ ·· ?. 3 gives -iir.h the art. And d '? R AuFb iu rii:. uetriui; ^ "^ Mafcnr and SägekRtl.e, -.iOdie ilii- ¹ ^ n-jrdnunrj ·] ργ" I rif * · "f-: and their Gejfc.jJ.tung, jo n-jchdem, dp diu ': j ^: i je f] r varzurj

6 ^C ; horizon iLe or vertiknLe cuts foe: -, t, IMMT jein; a 1 ■, o.ie:r uni \ / Hrneli for both interface types, il ... n top to van As, and van right to iinkci. Restrictions not including the choice of the cutting direction cannot be remedied here either,

The invention set itself the task, ^ iIe this represents = disadvantages of the various Mataretten3ägen3yitenzu avoid without adding to the delays of the individual types give, and in particular to open up the possibility of Schni te in every level and direction with constant and equal 'to be able to carry out safer handling.

To solve this problem a hand-held machine chain saw is used, in which; ^- iie Antriabsueile zi-ijchen ^M .oi3.- and hPtte parallel to the Schuerti.'ingdach ^ e is angscrdnet. since it shears with a chain around the drive shaft rotatable on the Ί ~

mounted on the housing containing the motor. Preferably the Motor coaxial to the Schuertachai =. and the whole Aggregate, consisting of Schuert, Ketts, UJink ^ gear and The motor armature and / or the entire motor is in the housing rotatably mounted. A particularly simple structure results in uif the angular gear between motor and chain drive j ~ Worm gear is formed.

In jeiterer embodiment of the inventive concept could between the rotary unit and the casing uirksamg auahebbare latches for predetermined Drehstellungan be arranged, which is preferably connected to sub-= ürecherschaLter in Motorstromkrei3 to'-sammenjirken such ü-j ': dio into operation only with effective locking mijgli-- L Furthermore, according to the invention, a U-shaped handle in connection with two transverse bores through the housing is provided for optionally receiving the H., -, £ -

31U-906

griffn van der'linken or van der right side of the device3. The U-shaped handle is fixed in the housing by causes an insertable latch in the plane of symmetry, uelcier is accessible when the housing is open and through the housing handle & " of the closed housing is held. The lower hole for the reception de? Handle is preferably on the Entry point of the lower chain strand, so that the lower tavern, of the U-shaped handle or its extension through the Housing through to the outside as a chain catch bolt is effective.

The handle preferably has its own additional actuation switch, which is in series with the other switches in the motor current circuit, which can be distributed as desired to the supply and discharge lines.
The invention is shown and described in several farms, and also with the aid of hand chain hunters with an electric motor drive, in which the motor with its shaft is built in parallel to the chain sword plane in a manner known per se. This arrangement results not only in a compact and almost symmetrical structure of the device, but also in realizing the idea of the invention without additional effort.

This also applies in principle for Matorkettensägen with Uer = brennungsmotor drive when the Motarwelle parallel to \ sword level. A transverse motor source would be added. ^; an additional angular gear is required to guide the drive unit = for the saw drive out of the motor housing in the required way parallel to the sword plane. In the drawings show in detail; Fig. 1 is a side view of a chainsaw from the chain = side, partly in section and in schematic form

Depiction;

2 shows the associated plan in longitudinal section; <II - V. Fig. 3 the view from above, i.e. the floor plan without Scr;, -!: -.- .; Fig. K a the side view of a second embodiment.

Fig ", i * b the associated plan of the chain;

BATH ORIGINAL

31U906-

Fig. 5 is a side view of a third embodiment with forward gear to expand the

Sword turning range; -

Li

6 shows the side view of a chain saw housing with a reversible side handle; 7 shows the same representation with the housing removed ^: .T =

Front part;

Fig. A is the associated top view; 9 shows the side view from the other side,

Z 1 J L _M

IkU ! "Fig. 10 an enlarged partial representation of the handle =

fixing in the housing ;.

11 shows a section in plane XI-XI of FIG. 10. The housing has an upper handle 2 and a lateral one.

Guide handle 3; ea contains the engine it inside. The motor = - .. ·
1 * 45 shaft 5 passes through the end wall 6 of the gear housing 7, which can be rotated about the Jellenlager 8. The motor shaft 5 is connected to the bevel gear 9, which meshes with the ring gear 10 of the drive shaft 11 for the chain 12. The motor anchor

'T "■ ·

can be connected directly to the bevel gear via the shaft 5. The endless saw chain 12 is guided in the usual way on the sword 13, which is fastened to the housing 7 so as to be adjustable in the longitudinal direction for tensioning the chain. For the definition of certain rotational positions of the transmission housing ses 7 or rotations of the sword plane, corresponding bores 1k are made in the housing end wall 6, into which a locking pin 15 can fall. This locking pin 15 is combined with a switching contact which is only switched on when the locking is effective.
A second pushbutton switch 16, which can be operated by hand, is attached to the device handle 3, and the main operating switch 17 is attached to the carrying handle 2. All three buttons or switches 15,16,17 are in series in the circuit of the motor k, so that the motor can only be started up if the pushbutton switches 16 and 17 are actuated at the same time, al ■: ■ by two-hand operation and the latch pin 15 is closed.

- ^: * * - * - 31H906

-ir - *

In the embodiment according to Fig. Ί + a and ^ b a worm gear is used instead of ds: bevel gear, bestenenc: u the worm 1Θ and the worm wheel 19. Apart from d3won, aa: this type of gear is insensitive to displacements caused by bearings and operations of the drive shaft and therefore chain or Mator braking on a mechanical Jege by axial displacement of the Mator armature? allows, the result is a very compact structure of the chain drive. In the case of bevel gears, even slight displacements of the gears impair the operation, so that heavy wear must be expected; this is particularly true with the use of polyamides or other synthetic materials for the crown wheel, which is common today.
In the embodiment according to FIG. K , motor 20, chain gear 21, sword 22 and chain 23 are combined to form a unit which is rotatably mounted with two pins 2 * t, 25 in 3 guides 26, 27 of the handle housing: 28 . It is obvious that:!: = In this case the axis of rotation of the unit does not have to be coaxial with the motor or screw shaft.

In the embodiment according to FIG. 5, the motor 29, chains = gear 30, sword 31 and chain 32 are in the same way to form a ^ Aggregate summarized, which, however, in larger circular " Openings 33 and 3 * + of the handle housing 38 with corresponding Cylinder surfaces 35 and 36 is rotatably mounted. Here de protrudes; Gear housing 37 forward sa far from the handle housing 33 that the rotation of the sword 31 and the chain 32 unb == hinders by 360 degrees is possible.

The inventive rotatability of the sword and the This enables the housing to be in the same basic position at all times. Importance to.

According to FIGS. 6 to 9, the carrying handle 39 lies in the symmetry? 5c = n £ of the device, in which the housing * + Q is also divided into two halves. The handle * »1 is roughly U-shaped. I-handle housing ^ O there are two cross holes U2, U3, i ~

BATH ORIGINAL

■ ^: - " ^: $ - 31H906

^ elcne the legs Uk, 45 of the handle 41 can be inserted, either from the left or from the right, depending on whether the machine is to be set for a right-hander for a left-hander. The fixing of the handle U in the housing UU is carried out by pins UG iπ of the plane of symmetry of the housing, and the fixing of the pins by joining: the housing halves, with one housing half covering and securing the pins US like a tilt; 10 and 11. The lower leg 45 of the handle M is lengthened so far compared to the other leg 44 that when it is inserted into the housing 40 it protrudes from the left into the sword or chain plane and thus as Chain catcher is effective. When inserting the bow handle on the other side, the handle itself takes on this function. It is obvious that the design of the interchangeable handle, the design of the plug-in pins and the receiving holes, as well as the design of its securing device in the housing can largely be adapted to individual needs, without abandoning the basic idea of the invention.

Blank page

Claims (1)

Claims Hand motor chainsaw, in which the drive shaft between the motor and the saw chain is parallel to the longitudinal axis of the sword, characterized in that the sword (13) is rotatably mounted on the housing (1) containing the motor (k) around the drive shaft axis (5). 2. Hand motorized chain saw according to claim 1, characterized in that the Matorwelle (5) is coaxial with the sword axis of rotation, and the entire unit, consisting of the sword (13), the saw chain (12), the angular gear (9, 10) and the motor = armature C k ) is rotatably mounted in the housing (1). 3. Hand motorized chain saw according to claim 1, characterized in that the sword (22), the saw chain (23), the Kettenge = gear (18,19), and the motor C 20) combined into a unit and in the handle housing (28 ) are rotatably mounted about the motor axis (20) or about an axis parallel to this. k. Hand motor chain saw according to claim 2 or 3, characterized in that the angular gear between motor C 20) and chains = drive C 23) is designed as a Sctieckenrad gear (18, 19. 5. Hand motor chain saw according to one of claims 1 to k , characterized by a disengageable lock C 14) effective between the rotatable unit (9) and the housing (1) for predetermined rotational positions. 6. Hand motor chain saw according to claim 5, characterized by an interrupter switch (5) in the motor circuit in mechanical ·: · cn connection with the lock (14) in such a way that it is only closed when the lock is effective. 7. Hand motor chain saw according to one of claims 1 to 6, marked = - - "■ - '- ^: - 31U906 3G is characterized by a sideways, U-shaped handle (41, UU, 45) and cross holes (42, 43) running through the housing (40) for the ideal reception of the handle (41) from the left or right side of the Gehju = SES (^ O) characterized 8. hand motor chain saw according to claim 7, / that for the backup the handle leg (44 , 45) on the housing (UD) insertable, plug-in latches (46) in the housing part level varge = can be seen, which are only accessible when the housing (UQ) is open and through the housing halves of the closed housing in their position being held. 9. Hand motorized chainsaw according to claim 7 or 8, characterized = shows that the lower brace (43) for the handle see = kel (45) immediately above the inlet point of the lower one Saw chain center is so that the lower leg (45) of the handle C 41) or its extension from the housing = uiand is effective as a chain catcher. 10. Hand motor chain saw according to one of claims 7 to 9, dadur characterized in that the handle (41) contains a separate power button (16) which = when the hand is inserted 5G handle (41) in the housing (40) in series with the the other buttons ((15, 17) are switched.