DE3436220A1 - Selector for percussion drills - Google Patents

Abstract

A selector for percussion drills for switching over from drilling operation to percussion drilling operation and/or from the first gear to the second gear and vice versa in each case is to be designed in such a way that it simultaneously combines the function of spring member, catching element and position indicator with good switchability. This aim is achieved according to the invention by catching lugs (4, 4') being provided on the outer circumference of the collar attachment (3, 3') and by the collar attachment being elastically deformable during the switching-over operation (Fig. 1). <IMAGE>

Description

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Patent - Verwaltungs - GmbH ο / q c ο ο η Theodor-Stern-Kai 1, 6000 Frankfurt

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ES 84/32 Frankfurt, October 2, 1984

Control handle for impact drills

The invention relates to a control handle for impact drills to switch from drilling to impact drilling and / or from 1st to 2nd gear and vice versa, the 'as with a grip strip provided thin-walled cup is formed, which merges upward into a hollow cylindrical collar attachment.

The invention is based on the object of a switch handle this Kind to the effect that it simultaneously has the function of spring member, latching element and position indicator, with good switchability united in itself.

This object is achieved according to the invention in that on the outer circumference the collar attachment locking lugs are provided and the collar attachment is elastically deformable during the switching process.

The invention is illustrated below with reference to the drawing, the two Exemplary embodiments illustrated, explained.

1 shows a plan view of a switch handle

for a hammer drill to switch - from drilling mode to drilling mode and

vice versa,

FIG. 2 shows a view of the switch handle according to FIG. 1 in direction A in: 'half-section ', '

FIG. 3 is a view of the switch handle according to FIG from underneath,

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4 shows a plan view of a switch handle for switching a drill or hammer drill from 1st to 2nd gear and vice versa,
FIG. 5 is a view of the switch handle according to FIG

in direction B, partially in section, FIG. 6 shows a view of the switch handle according to FIG from underneath.

The one-piece switch handle according to Figures 1 to 3 consists of a permanently elastic, wear-resistant plastic with a low coefficient of friction. It is thinner-walled than provided with a grip strip 1 Cup 2 formed, the upward in a hollow cylindrical collar attachment 3 (ring part) passes. The collar-shaped approach 3 contains on its outer circumference two locking lugs 4 spatially offset from one another by 180 °. In which are located diametrically to the collar base 3 extending handle strip 1, two position indicators 5, 6 are cut out, each of which indicates the operating state "hammer drilling" define. Corresponding locking recesses provided in the drill housing are assigned to the locking lugs 4.

The control handle contains 7 on its lower, cylindrical part a sawtooth-shaped extension 8, which is used to fix the position of the switch handle serves in its installation position and interacts with an extension in the hammer drill holder that engages behind this approach.

The recess 9, which extends up to the inner wall of the grip strip 1, serves to accommodate the axis of the switch handle for switching from drilling to hammer drilling. The mounted in the cup 2 Längsschii "fezes 10 define the operating state" drilling "and contribute to the elastic deformability of the control handle in. In the example illustrated by the figures 4 to 6, is also made of an elastically deformable plastic shifter is the collar-shaped projection 3 ¹ of Chalice 2 ¹ on its outer circumference ^: likewise with two spatially 180 ° opposite one another

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ES 84/32

offset locking lugs 4 'provided, which are assigned locking recesses made in the housing of the hammer drill. In the offset by 90 ° to the latching warts 4 ¹ 1 ^1, the handle strip positions 1 and 2 are cut out, which determine the ersteh and the second transmission gear of the drilling machine.

In its lower part, the control handle has a cylindrical shape Approach 11, which has an annular groove 12, in which a sealing ring 15 is inserted in the installed position of the handle. At the extension 11 containing the groove 12 is followed by an eccentric which has a recess 14 for a safety line 18 is provided.

An actuating element 16 for moving the gear wheels is mounted on the eccentric 13. At 17 is the housing of the impact drill designated.

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Claims (4)

Pateni - Verwaltiinos, - · 3ιηΙ · Η Theodor-Stern-Kai 1, 6000 Frankfurt 3436220 ES 84/32 Frankfurt, October 2, 1984 claims 1o 1. Control handle for impact drills to switch from drilling mode on hammer drilling and / or from 1st to 2nd gear and vice versa, as with a handle bar 'provided thin-walled cup is formed, which merges upward into a hollow cylindrical collar attachment, thereby characterized in that on the outer circumference of the collar attachment (S, 3 ') Latching lugs (4, 4 ') are provided and the collar attachment can be elastically deformed during the switching process. 2. Switching handle according to claim 1, characterized in that position indicators are recessed in the wall of the handle strip are. 3. shifter according to the response und'2, characterized in that it is equipped with _M Hajter.ungselementen clutch and for the mechanical {see association with the moving parts to be provided. · Ϊ 4. Shift handle according to claims 1 to 3, characterized in that that it contains an eccentric. EPO COPY