DE3008847C2 - Elastic device for adjusting the cutting height on lawnmowers - Google Patents

Description

management link 3 possible. If the wheel axle with the

_w Support mandrel 4 is connected via the lever 6, this is

I * elastic movement more restricted than when one is on

φ the lever β is dispensed with and the wheel axle with the support

J # dorn 4 only connects Im via the spring arm 5

te? the latter case results in an elastic movement

ψί possibility in the areas indicated by the three double arrows A, B and

Sf C given directions while when using

pi of the lever 6 the elastic movement in the

i essentially in directions corresponding to the double

f§ arrow A is restricted The arrows A, B and C are available

perpendicular to each other, the arrows B and C in one

I ^ common, essentially horizontal plane bright In any case, the helical torsion spring 1

> f all vibrations, knocks and shocks that occur

|! to dampen reliably and to reduce the wear and tear of the

• I? to keep men-affecting parts small.

1 sheet of drawings

25th

30th

35

(',

45

55

Claims (3)

1 2 Shocks and bumps from the adjustment device Patent claims: and their parts largely kept away and wear kept low, whereby an unintentional 1. Resiliently acting device for setting ended adjustment of the Schnitlhöhe largely expressed Cutting height in lawn mowers with one that stays close to 5. Cutting height determining, set on the ground- This task is made possible by the characteristics of the characteristic Zenden impeller, in which an elastically deflectable drawing part of claim 1 is solved Adjusting and locking member but an actuating Due to this training is practically between transmission link on the wheel axle or one with the wheel sitting on the ground on the one hand and This connected part engages, thereby attached to the frame having the notches indicates that the actuator as a part on the other hand a total and in all directions Helical torsion spring (1) designed is provided on elastic connection, which the upper a mandrel (4) is supported and with one end supply of shocks, shocks, vibrations or the like. with an arm firmly connected to the wheel axle between the two parts and practically exclude (5) and with the other end with the adjustment and 15 dampen these shocks and vibrations and thereby The locking member (3) is also connected to a relative movement between which the detents 2. Elastically acting device according to the instructing part and the adjustment and locking claim !, characterized in that the wheel axis exclude treatment member, so that there is also no Veran a wear swiveling around the axis of the dome (4) or an unintentional switching movement Lever (6) is provided and the arm (5) on the 20 can step. consisting of lever (6) and wheel axle pivoting Advantageously, the wheel axle is on one to the Bar unit engages the axis of the dome and pivotable lever is provided 3. Device according to claim 1 or 2, characterized in that the arm engages the pivotable part that consists of this lever and the wheel that the support mandrel (4) of the screw axis. Because of the ben-Torsionsfeder (1) a Höhenverstcllvorrich- 25 high elasticity of the helical torsion spring can associated with this supporting mandrel is a height adjustment be assigned to the device in order to before allow height adjustment by changing the location of the support mandrel is changed.
30 The invention is explained below on the basis of a The invention relates to an elastic single-matic drawing based on an exemplary embodiment. Direction for setting the cutting height on lawnmowers is explained hern with the features of the generic term in the drawing, the essential parts of the ela- claim 1. stically acting device and the associated parts An elastically acting device of this type is only simplified from FIG. 35 and is known schematically in DE-OS 21 42 551 in perspective. The well-known Einrichscher representation reproduced,
The device for setting the cutting height has a running roller of the cutting height on lawnmowers that is rotatable about a transverse axis and has a frame or roller, the axis of which at its ends between fixed levers or two levers with the frame of the lawnmower is arranged, which in turn is mounted on the frame of the lawnmower so as to be pivotable about a transverse axis connected via a height adjustment device. The two levers are threaded to one another via a 1 and thus supported. One end of the transverse stiffening element is connected to which an elastic spring 1 is fastened with an elastically deflectable adjusting and locking element or locking element with actuating element 3 connected to the lateral locking recesses. In the example shown, one end of a spring that is rigidly attached to the frame of the lawnmower is at the same time designed as an arm 3 optionally arranged at an angle to the axis of the position determining member in and outside of the support mandrel 4. and the locking member and its actuator forms the adjusting and locking member through its adjustment member 3 and is made possible with a schematically constricted elasticity is stically bendable is when the member engages in a The other end of the helical torsion spring 1 is Latching recesses hold the roller in its relative position with an arm 5 firmly connected to the wheel axle rigidly fixed in relation to the lawn mower frame. tied together. In the example shown, the axis of the It is known that when a conventional lawn wheel is operated, a lever 6 is arranged at one end mower whose wheels alternate impact effects whose other end around the axis of the support mandrel 4 are exposed to obstacles through which it can be pivoted. The end facing the wheel axle vibrations of the drive motor or by the un- spring 1 is than that at an angle to the axis of the Proper actuation of the clutch triggered arm 5 aligned on the domes 4 the can. Such impacts have an elastic effect on the lever 6. For this purpose, the utmost bendable adjusting and locking member, so that the end of the arm 5 is angled and engages in a drilling this and the associated locking recesses a tion of the wheel axle, so that there is no special subject to rapid wear and tear and also unintentional locking means between the out of the wheel axle and can be adjusted in their position. the lever 6 existing swivel unit and the Fe- The invention is based on the object of requiring a load arm 5. stically acting device for adjusting the cut Due to the training described is an all-height in the case of lawnmowers with the characteristics of the Anscitig elastic movement between the impeller 2 Proverb 1 so that the inevitable or its wheel axle and the adjustment and Verrieee-