GB2423735A

GB2423735A - Cordless power tool with charging cradle

Info

Publication number: GB2423735A
Application number: GB0603673A
Authority: GB
Inventors: Wolfgang Hirschburger; Karla Guertler
Original assignee: Robert Bosch GmbH
Current assignee: Robert Bosch GmbH
Priority date: 2005-03-01
Filing date: 2006-02-23
Publication date: 2006-09-06
Anticipated expiration: 2026-02-23
Also published as: GB2423735B; GB0603673D0; DE102005009913A1; CN1827308A; CN1827308B

Abstract

A cordless hand machine tool 10 and charging cradle 20. The tool having a housing with projections and recesses and a charging plug-in opening (50, fig 3) which complements a charging plug (52 fig 2) of the charging cradle. The tool can be safely and conveniently stored in the charging cradle. The cordless hand machine tool is configured like a bow and can be slid into a parked position and secured in place in the charging cradle and in so doing automatically adopts charging position in which the charging plug engages in the charging plug-in opening. The tool may be an electric sanding device.

Description

Cordless hand machine tool with charging shell The present invention is

based on a cordless hand machine tool with a charging shell according to the preamble of claim 1.

Cordless hand machine tools with charging shells are already known, in which the cordless hand machine tool is put into the charging state simply by placing it loose on the charging shell, but is not secured in place. This means that the cordless hand machine tool may fall and become damaged in the event of vibrations of the charging shell.

Advantages of the invention By means of the present invention with the features of claim 1 the cordless hand machine tool can be positioned on the charging shell, secured in place, by positive and non- positive locking, so the charging shell can be used instead of a tool box for permanent storage of the cordless hand machine tool.

In that arranged on the cordless hand machine tool are projections and recesses corresponding with matching projections or recesses in the charging shell, which mutually interlock by positive and/or non-positive locking in the parking position of the cordless hand machine tool, securing the cordless hand machine tool in place is guaranteed with low expenditure.

In that between its sanding disc and its housing the cordless hand machine tool forms a slit with a defined width, to which on opposite sides a rib of the charging shell is assigned for engagement in each case, securing the cordless hand machine tool in place can be effected with simple means and it can be pushed into the charging shell like a drawer - with its rear side facing the charging shell.

In that the charging shell has a projecting plug contact on its inner side for engagement in a plug opening of the cordless hand machine tool, fast, accurately targeted positioning of the cordless hand machine tool for charging, with the plug opening to the plug contact, is ensured and is supported in guidance to the target by the interlocking projections and recesses.

In that the charging shell has several stepped walls or faces, spaced apart parallel to one another, wherein the cordless hand machine tool is supported on the top stepped face with the underside of the sanding disc, sanding blades and similar accessories are easily accessible and visibly stowable in the intermediate spaces between the faces.

In that the housings of both the hand machine tool and the charging shell consist of longitudinal shells they are easy to produce and quick to assemble.

Drawings The invention is explained in greater detail below using an

embodiment example.

Fig. 1 shows the cordless hand machine tool according to the invention in the parking position with the charging shell.

Fig. 2 shows the charging shell three-dimensionally diagonally from the front.

Fig. 3 shows the cordless hand machine tool diagonally from the front.

Fig. 4 shows a side view on to the inner side of the housing of the charging shell.

Fig. 5 shows a side view of the charging shell.

Fig. 6 shows a horizontal projection of the charging shell.

Description of the embodiment example

Fig. 1 shows a cordless hand machine tool 10 in its parking position in a charging shell 20. The hand machine tool 10 is configured as a cordless orbital sander and carries on the underside 11 of its housing a sanding disc 14 with a bow-shaped base surface running to a point at the front.

Its housing upper side 13 acts as a handle. Between the sanding disc 14 and the underside of the housing 12 a straight, circulating slit 16, parallel to the sanding disc 14, is formed. The housing 12 consists of two longitudinal shells 120, 121, joined together centrally in a scarcely visible longitudinal joint 122.

The charging shell 20 is formed from an irregularly pyramid-shaped housing 21 and has a diagonal, flush front face 22 and a substantially perpendicular rear face 23.

Between the front and rear faces 22, 23 runs an upper edge 24, sloping downwards towards the rear. The housing upper side 13 of the hand machine tool parked in the charging shell 20 runs practically parallel or flush towards the upper edge 24.

The housing 21 of the charging shell 20 consists of longitudinal shells 200, 201, joined together centrally (Fig. 2), wherein a scarcely visible, continuously central longitudinal join 26 can be seen in the front face 22 and the upper edge 24.

The rear face 23 of the housing 21 runs substantially perpendicular and is at the same time convexly curved laterally. Emerging from the rear face 23, in the centre of the lower region, is an electric cable 25 for the power supply of an electronic charging unit 27 (Fig. 4) arranged inside the housing 21.

The charging shell 20 has in its lower region four stepped walls 30, 32, 34, 36, spaced apart parallel to one another, which at the front have horizontal edges curving forwards.

The walls 30 to 36 have an incline starting from the front face 22 and running downwards towards the rear. The sanding disc 14 of the hand machine tool 10 can be supported in its parking position on the top wall 36. In the intermediate spaces formed below this by the walls 30, 32, 34, resembling shelf compartments, sanding blades or similar accessories intended for the hand machine tool 10 can be stored as easily visible and accessible.

Between the top stepped wall 36 and the upper edge 24 of the charging shell 20 extend side walls 40, 42, which surround the rear region of the hand machine tool 10 laterally, at least partially flush, and form an insertion compartment for it. For this the side walls 40, 42 carry on their inner sides at least one longitudinal rib 44, 46 in each case, running towards the rear, parallel to the walls to 36. When the hand machine tool 10 is put into the parking position, the longitudinal ribs 44, 46 are pressed into the lateral region of its slit 16, so the hand machine tool 10 can be held thereby. They simultaneously position the rear face 48 (Fig. 3) of the hand machine tool 10, which has a charging plug-in opening 50, into which a charging plug 52 (Fig. 2) in the upper region of the front face 22 fits. If the hand machine tool 10, held on the longitudinal ribs 44, 46, is pushed into the charging shell 20 like a drawer - quasi backwards with an incline and thereby, supported by gravity, is practically automatically driven into the garage - and in this way conveniently and safely put into the charging and parking position, the charging plug 52 of necessity and accurately targeted enters the plug-in opening 50 of the hand machine tool 10, so if the mains connection of the charging shell 20 is intact the hand machine tool 10 automatically adopts the charging state in the parking position.

Fig. 2 shows a three-dimensional view of the charging shell as an individual unit diagonally from the front. The front face 22 with the stepped walls 30 to 36, the side walls 40, 42, the right-hand one of the longitudinal ribs 44, 46 and the charging plug 52 are in the recessed upper region of the front wall 22. Additionally, a second, narrower rib 45, parallel above the longitudinal rib 44, is visible, which is supported laterally by springs on the housing 12 of the cordless hand machine tool 10 and helps to lock it in its parking position.

Fig. 3 shows the cordless hand machine tool 10 as an individual unit diagonally from the front, the slit 16 between the sanding disc 14 and the housing 12 and the longitudinal joint 122 between the longitudinal shells 120, 121 being particularly clearly identifiable.

Fig. 4 shows an inside view of the longitudinal shell 201 of the charging shell 20 with the electronic charging unit 27 held therein and the charging plug 52. The arrangement of the flat, stepped walls 30 to 36, sloping diagonally towards the rear, the configuration of the side wall 42 with the longitudinal ribs 46, 47, the shape of the upper region of the front face 22 and the arrangement of the ventilation slits 60 in the base 62 and in the rear face 23 also become particularly clear.

Fig. 5 shows the external side view of the longitudinal shell 200 of the housing 21 of the charging shell 20, the projecting arrangement of the walls 30 to 36, the contour of the side wall 42 and the curved rear face 23 being clearly identifiable.

Fig. 6 shows the horizontal projection of the charging shell 20, with the configuration of the walls 30 to 36, the side walls 40, 42 with the longitudinal ribs 44, 45, 46, 47, the charging plug 52 in the upper region of the front face 22, the curved rear face 23 and the longitudinal joint 26.

Claims

Claims I. Cordless hand machine tool with charging shell (20) and with a

housing (12) with projections and recesses (12) and with a charging plug-in opening (50), which is assigned to a charging plug (52) of the charging shell (20) characterised in that the cordless hand machine tool (10) is configured like a bow and can be pushed into a parking position, secured in place, in the charging shell (20) like a drawer and in so doing automatically adopts its charging position, in which the charging plug (52) engages in the charging plug-in opening (50)
2. Cordless hand machine tool according to claim 1, characterised in that arranged on the housing (12) are projections and/or recesses (16), corresponding with projections or recesses (44, 45, 46, 47) in the charging shell (20) , which mutually interlock by positive and/or non- positive locking in the parking position of the cordless hand machine tool.
3. Cordless hand machine tool according to claim 1 or 2, characterised in that arranged between its sanding disc (14) arid its housing (12) is a slit (6) with a defined width, to which on opposite sides in each case a rib (4 46) of the charging shell (20) is assigned for engagement.
4. Cordless hand machine tool according to claim 1 or 2, characterised in that the charging shell (20) has on its front face (22) an, in particular projecting, ping contact (52) for engagement in a plug-in opening (50) of the cordless hand machine tool (10)
5. Cordless hand machine tool according to claim 1 or 2, characterised in that the charging shell (20) has several stepped walls (30, 32, 34, 36), spaced apart parallel to one another, wherein the cordless hand machine tool (10) is supported on the top stepped wall (36) with the underside of its sanding disc (14), the intermediate spaces between the wails (30, 32, 34, 36) acting as storage space for accessories.
6. Cordless hand machine tool according to claim 1 or 2, characterised in that the housings (12, 21) of the cordless hand machine tool (10) and the charging shell (20) consist of longitudinal shells (120, 121; 200, 201)
7. Cordless hand machine tool according to claim 1 or 2, characterised in that the cordless hand machine tool (10) has a lithium ion accumulator, arranged in the housing (12) in particular as invisible from outside.
8. A cordless hand machine tool and charging unit substantially as herein described with reference to the accompanying drawings.