JP2003522041A - Hand-held machine tool - Google Patents

Abstract

(57) Abstract: A hand-held machine tool having a casing (12, 121, 122) manufactured in a shell structure provided with a motor casing (20) having a free end manufactured in a shell structure. 10) can be inspected and serviced very easily because the motor casing (20) has a swivel cover (60) which is irreversibly opened on the end side.

Description

Detailed Description of the Invention

[0001]   Background technology   The invention starts from a hand-held machine tool according to the preamble of claim 1.

Hand-held machine tools, in particular hand-held drill machines and drill hammers, having a cylindrical casing of the pot construction type with a closing cover arranged at the end are known. However, this cover can be opened only with a special tool with a lot of trouble.
Moreover, this cover is not suitable for replacement of carbon brushes or only as a very limited inspection and repair cover (Servicedeckel). Furthermore, the known covers cannot reliably prevent losses from the casing.

Advantages of the invention The hand-held machine tool according to claim 1 has the advantage that the casing cover on the end face side is prevented from being lost and that the casing cover can be released without the use of auxiliary tools. ing.

[0004]   Drawing   Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the accompanying drawings.

FIG. 1 is a three-dimensional view of a drill hammer according to the present invention having a depth stopper, FIG. 2 is a partial view of the drill hammer seen from below, and FIG. 3 shows an enlarged view of FIG. Fig. 4 is a diagram based on Fig. 3 when the cover is opened, Fig. 5 is a diagram based on Fig. 4 in a state where the cover is opened, and Fig. 6 is a development view of a casing of a drill hammer. FIG. 7 is a partial longitudinal cross-sectional view of the drill hammer.

Description of Embodiments FIG. 1 shows a three-dimensional view of a hand-held machine tool 10 formed as a drill hammer, as seen from the front left side. The hand-held machine tool 10 has a casing 12, which has one handle 14 formed as a shovel-type handle (Spatengriff) and is split longitudinally into right and left casing shells. It consists of 121 and 122. The handle 14 has a switch button 16. An electric cable 18 extends downward from the switch button 16 to supply energy to a motor (not shown) arranged inside a motor casing 20 which is a part of the casing 12. The motor casing 20 is divided into motor casing shells 201 and 202 integrally with the casing shells 121 and 122. These motor casing shells 201
, 202 are arranged in a direction perpendicular to the longitudinal axis 27 of the handheld machine tool 10. This longitudinal axis 27 corresponds to the hand-held machine tool neck 22 and the chuck 2
4 and an insert tool 26 formed as a drill.

Similarly, the auxiliary handle 28 extends downwardly in a direction perpendicular to the longitudinal axis 27.
It extends away from. The auxiliary handle 28 is detachably held on the hand-held machine tool neck 22 by using a tightening band 30.

The auxiliary handle 28 has an upper extension 29 having a concave radial bearing surface 40.
Is provided. This support surface 40 is defined for mounting the hand-held machine tool neck 22, which ensures that the auxiliary handle 29 is held in the casing 12.

On both sides of the radial bearing surface 40, which is concave when viewed from the front, the upper extension 29 is
Two legs are formed, and only the larger support leg 31 of these legs is shown in detail. In this support leg 31, a depth stop 32 formed as a hexagonal rod is supported non-rotatably but movably in the longitudinal direction in a longitudinal guide 38 formed as a hexagonal hole. The depth stopper 32 has an upper toothed molding portion 34 and a lower toothed molding portion 35 on opposing hexagonal surfaces. By means of these toothed parts 34, 35, the depth stop 32 is releasably fixed in the longitudinal guide part 38 in a form-locking manner, that is to say by a shape constraint.

In FIG. 2, the lower region of the motor casing 20 is partially shown. The motor casing 20 is closed by a swivel cover 60 on the end face side. The swivel cover 60 is pivotally mounted on the threaded dome 64 of the left casing shell 121. The swivel cover 60 covers the lower half of the motor casing 20 in the area of the carbon brush. The swivel cover 60 is fixed to the motor casing 20 via a lock screw 66 for use during operation. This lock screw 66
Is permanently attached to the swivel cover 60.

By removing the lock screw 66, the motor casing 20 and the swivel cover 60 are removed.
The bond between and is released. The swivel cover can be swung open without having to be completely removed from the device.

The lock screw 66 can be unlocked with a screwdriver or with a key or coin. A particularly simple and comfortable replacement of the carbon brush is achieved by opening the swivel cover 60. The motor casing 20 is gripped so as to surround a special sleeve casing (FIG. 6). The sleeve casing 62 is inserted between the casing shells 121 and 122 during assembly. The sleeve casing 62 has at its lower end a radially outwardly directed threaded hole 68 for engaging the locking screw 66 and a carbon brush for the motor.

The right casing shell 122 is made up of two parts. This right casing shell 122 has a small cover for inspection of the line (electrical cable) 18. The cover is fixed to the casing by two screws. This electrical cable 18 can be easily replaced or repaired by removing the cover without disassembling the entire casing shell.

In order to remove the cable from the machine, the two screws of the clamping strip must be released.

[Brief description of drawings]

[Figure 1]   3 is a three-dimensional view of a drill hammer according to the present invention with a depth stop.

[Fig. 2]   It is a partial view of the drill hammer seen from below.

[Figure 3]   FIG. 3 is an enlarged view of FIG. 2.

[Figure 4]   It is a figure based on FIG. 3 at the time of opening a cover.

[Figure 5]   FIG. 5 is a view based on FIG. 4 with the cover opened.

[Figure 6]   It is a development view of the casing of a drill hammer.

[Figure 7]   It is a longitudinal direction partial sectional view of a drill hammer.

[Explanation of symbols]

10 hand-held machine tool, 12 casing, 14 handle, 16 switch button, 18 electric cable, 20 motor casing, 22 neck, 24 chuck, 26 insert tool, 27 longitudinal axis, 28
Auxiliary handle, 29 extension, 30 tightening band, 31 support leg,
32 depth stopper, 34, 35 toothed forming part, 38 longitudinal guide part, 60 swivel cover, 62 cover casing, 64 screw dome, 6
6 lock screw, 68 screw hole, 121, 122 casing shell, 201, 202 motor casing shell

─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Marx Heckman             Federal Republic of Germany Filderstadt               Hernle Sveg 3

Claims (3)

[Claims] 1. A casing (12, 121, 1) manufactured in the form of a shell structure.
22) A hand-held machine tool (10) having a motor casing (20) with a free end, which is also produced in shell construction, A hand-held machine tool characterized in that (20) has a swivel cover (60) on the end side, and the swivel cover (60) can be opened without loss. 2. Hand-held machine tool according to claim 1, wherein the swivel cover (60) is connected to the casing (12) via a hinge (64). 3. Hand-held machine tool according to claim 1 or 2, characterized in that the swivel cover (60) can be opened without tools.