DE2009167B1 - Gear for an electric motor-driven hedge trimmer - Google Patents

Description

bore arranged eccentric hub (3) with an eccentric guide pin (3 '), which carries the second guide pin (12) by means of a web (11).

2. Gear for an electric motor-driven hedge trimmer with counter-rotating blades according to claim 1, characterized in that sliding rings on the guide pin (3 '12) (24, 25) are arranged, which roll in elongated holes of the shear blades (9, 13).

3. Gear for an electric motor-driven hedge trimmer with counter-rotating blades according to claim 1 and 2, characterized in that the transmission is a self-contained Unit is formed.

4. Gear for an electric motor-driven hedge trimmer with counter-rotating blades according to claim 3, characterized in that the structural unit is divided into one of two shell halves Existing motor housing (26) inserted, fixed in this (27) and enclosed by the shell halves is.

1 sheet of drawings

COPV

Claims (1)

1 2 The present invention relates to a transmission with a guide pin 3 'eccentric to the central axis for an electric motor driven hedge the eccentric hub arranged in an elongated hole scissors with counter-rotating blades, the loading of which the upper blade 9 slides and the same movement by a one-sided driven face end. However, to reduce the surface pressure in the shear wheel attached double eccentric takes place. 5 keeping the knife guide as small as possible is the An embodiment is already known in which the diameter of the guide pin 3 'is thereby avoided Eccentric that enlarges the upper and lower cutter that a sliding ring 24 is placed on them Move the hedge trimmer, unilaterally on the bottom, whose outer diameter is the width of the long one Gear are arranged one below the other. The hole corresponds to the fit and is opposed to it As a result, the eccentric only becomes a relatively narrow one over the longitudinal movement of the cutting blade Bridge with the gear in connection tive rolling movement executes. Furthermore is on stand and thus the risk of breakage when the guide pins 3 'are raised, another web 11 is pressed on, the load on the cutting blades. Fixed in its position by means of a feather key 10 Condition of maximum stability between and is taken. In another hole two eccentrics is a large stroke of the opposing 15 of the web 11, which is also eccentric in its position The cutting knife is only possible to a limited extent, since one is arranged on the central axis of the eccentric hub 3, can only be achieved at the expense of space requirements, a second guide pin 12 is pressed in, the can. the lower cutting blade 13 via a sliding ring 25 Furthermore, an embodiment is known that moves. in which the upper and lower knife by Ex- 20 An overloading of the gear assembly and the center are moved in opposite directions, the eccentric motor as a result of intervening in the cutting knife ter for the upper knife on one side surface foreign matter is arranged in a known manner by one of a gear is, while the tolerance ring 5, which is inserted between the collar-shaped eccentric of the lower blade on the opposite part of the eccentric hub 3 and the spur gear 6 is the side surface of the same gear. The 25 is avoided. This is achieved in that the movement of the shear blades takes place in such a way that only friction-induced connection between the upper blade and the lower blade through coupling eccentric hub 3, tolerance ring 5 and spur gear 6 a management members (connecting rods) are pushed back and forth. Spinning of the spur gear 6 against the eccentric - For this purpose, the coupling links on temabe 3 are allowed in the event of overload,
their front ends are connected with pegs, which are 30 The cutting blades 9, 13 are located on the upper and lower blades. The sheet guide 8 and the cover 14 attached opposite ends of the coupling members connecting screws IS, 16 in elongated holes 21 are designed as bearings, which guide the eccentric, whereby a deflection or tilting of the overlap. This version is, however, a ratio of shear blades is prevented. The shear blade guide is moderately complex and, in terms of series production 35, is associated with considerable costs by means of set screws 17, 22 on the Gem. gear housing 1 attached. A lid 18, which means The object of the invention is, within the framework of the screws 19, to be fastened to the shaft screws 17, given the space available, an eccentric arrangement closes the gear unit off to form a self-contained unit that is structurally simple to move the shear blades. To design this as a closed structural unit, so that an optimal stroke or a gearbox formed 40 is inserted into a motor housing 26 consisting of two shell-optimal opening between the cutting teeth halves and can be reached. Furthermore, an over- by means of fastening eyes 27 is to be fixed in this,
load on the machine can be avoided and with the subject matter of the invention, simple measures to convert the gearbox to a particularly advantageous effect that by using only one movable cutter 45 can form the eccentric hub with its guide pin. and the web with the second guide pin in the According to the invention, this task is particularly met within the framework of the space available solves that the double eccentric can be generated from a collar-shaped large strokes. The diameter and the guide bolts or their slip rings are torque-locked in the spur gear bore ser arranged eccentric hub with an eccentric 5 ° independent of it and can be selected so There is a guide bolt that by means of a web that the surface pressure in the shear blade guide second guide pin carries. is kept as small as possible. Also a replacement Details of the invention are based on the cutting knife is easy to draw, which range from an example embodiment. It can also be done by omitting the bridge represents, described in more detail, namely on a 55 the hedge trimmer with only one movable seer longitudinal section be made to measure by the gear arrangement. Through training drove the two counter-rotating blades. of the transmission as a self-contained structural A unit installed in the gear housing 1 enables a separate assembly in terms of production technology. Bearing bore 23 engages in the drawing not days of the gearbox and motor arrangement,
The illustrated motor pinion into a spur gear 6 and 60 combs with this. The spur gear 6, in turn, is based on claims:
the collar-shaped part of an eccentric hub 3 is 1. gear for an electric motor driven and is fixed by a locking ring 7 in the same hedge trimmer with opposite Schermesner axial position. A sern in the gear housing 1, the movement of which is carried out by a spur gear driven on one side on the firmly pressed-in bearing pin 2, mounted on the outer rings of the collar-shaped part of the eccentric, thereby marked-eccentric hub 3 and spur gear 6 are pressed. net that the double eccentric is made of a collar On the lower face of the eccentric hub 3 is - shaped and torque-locking in the spur gear -