WO2020212141A1

WO2020212141A1 - Hand-held power tool having a rod-shaped housing

Info

Publication number: WO2020212141A1
Application number: PCT/EP2020/059208
Authority: WO
Inventors: Juergen Wiker; Ralf HAFNER; Florian Esenwein
Original assignee: Robert Bosch Gmbh
Priority date: 2019-04-17
Filing date: 2020-04-01
Publication date: 2020-10-22
Also published as: DE102019205535A1

Abstract

The invention relates to a hand-held power tool (100) having a rod-shaped housing (110) which has a first and a second housing portion, the first housing portion (112) being designed to at least partially receive at least one power supply unit (165), in particular of an exchangeable battery pack (160), and a grip region (120) being provided on the first housing portion, a drive motor (150) for driving an insertion tool being arranged in the second housing portion (152). The grip region has at least one hand support region (122) for at least partially supporting the palm of a hand and a grip waist (124), the grip waist being graspable at least substantially in one-handed manner by a user of the hand-held power tool, in particular using the index finger (192) and thumb (191), a longitudinal axis (402) of the grip waist oriented in the longitudinal direction (199) of the rod-shaped housing being arranged at least approximately parallel with and at a predefined axial distance (x) from a longitudinal axis (404) of the drive motor oriented in the longitudinal direction of the rod-shaped housing, and the hand support region being oriented at a predefined angle (c) with respect to the longitudinal direction of the rod-shaped housing.

Description

description

title

Hand machine tool with a rod-shaped housing

State of the art

The present invention relates to a handheld power tool, in particular a router, with a rod-shaped housing that has a first and a second housing section, the first housing section being designed to at least partially accommodate at least one energy supply unit, in particular a replaceable battery pack, and on the first housing section a grip area is formed, and wherein a drive motor for driving an insert tool is arranged in the second housing section.

Such a hand tool designed as a router is known from the prior art. This router has a rod-shaped housing with a first and a second housing section. A power supply unit, in particular an exchangeable battery pack, is arranged in the first housing section. Furthermore, a grip area is formed on the first housing section, and a drive motor for driving an insert tool is arranged in the second housing section.

Disclosure of the invention

The present invention relates to a handheld power tool, in particular a router, with a rod-shaped housing which has a first and a second housing section, the first housing section being designed to at least partially accommodate at least one energy supply unit, in particular a replaceable battery pack, and on the first Housing section, a grip area is formed, and wherein a drive motor for driving an insert tool is arranged in the second housing section. The grip area has at least one palm rest area for at least partial palm rest and a grip waist, the grip waist being able to be grasped at least essentially with one hand by a user of the handheld power tool, in particular with the index finger and thumb. A longitudinal axis of the grip waist aligned in the longitudinal direction of the rod-shaped housing is arranged at least approximately parallel and at a predetermined axial distance to a longitudinal axis of the drive motor aligned in the longitudinal direction of the rod-shaped housing, and the palm rest area is aligned at a predetermined angle to the longitudinal direction of the rod-shaped housing .

The invention thus makes it possible to provide a handheld power tool in which an improvement in the ergonomics of the handle of the handheld power tool can be made possible through the grip area with the hand rest area and the grip waist. In this case, the design of the grip area can prevent premature fatigue of a user's hand when working with the hand-held power tool in a simple and uncomplicated manner.

The grip area is preferably designed to restrict the formation of a Griffwin angle between a wrist of a user gripping the grip area and a workpiece to be processed to a value between 20 ° and 50 °, preferably 30 °. Thus, a grip area can be formed in a simple manner, by means of which an ergonomic hand position of a user is made possible, in which a wrist of the user is comparatively straight, i.e. not angled and / or not twisted, can be arranged in a working position on the grip area.

Preferably, the second housing portion has a first circumference and the grip waist has a second circumference, the second circumference being smaller than the first circumference. A suitable hand support area can thus be provided in a simple and uncomplicated manner. According to one embodiment, the second circumference is between 155 mm and 180 mm, preferably 173 mm. A grip area can thus advantageously be provided which can be grasped with one hand.

The handle waist is preferably assigned a handle stop which is arranged adjacent to the hand rest area, the handle stop having a longitudinal axis that is aligned in the longitudinal direction of the rod-shaped housing is assigned, which runs in the direction of the rod-shaped housing through the handle stop and at least is arranged approximately parallel and in a predetermined distance from the longitudinal axis of the drive motor. Thus, a suitable grip area with the hand rest area as well as the grip waist can be provided in a simple manner.

There is preferably at least a ratio in the range from 1: 1 to 1: 2, preferably 1: 4, between the predefined axial spacing and the predefined spacing. A comparatively compact design of the hand tool machine can thus be made possible.

According to one embodiment, a deviation of +/- 20%, in particular +/- 10%, is assigned to the ratio. A simplified production of the handheld power tool can thus be made possible.

Preferably, the handle stop is assigned a handle height which has a value between 100 mm and 190 mm. In this way, a suitable grip height for safely guiding the handheld power tool can be formed.

The drive motor is preferably an electronically commutated motor. A drive motor with a comparatively small installation size can thus be provided.

A machine housing is preferably provided which is connected to the rod-shaped housing on the second housing section and to which a guide device is attached, which is designed to enable the handheld power tool to be supported on a workpiece to be machined. This enables safe and reliable guidance of the handheld power tool on a workpiece to be machined. Brief description of the drawings

The invention is explained in more detail in the following description with reference to Ausführungsbei shown in the drawings. Show it:

1 shows a side view of a handheld power tool,

FIG. 2 shows a plan view of a receiving area for the arrangement of a finger of a user of the hand-held power tool from FIG. 1,

3 shows a sectional view of the handheld power tool from FIG. 1, and FIG

FIG. 4 is an enlarged view of the sectional view of FIG. 3.

Description of the exemplary embodiments

1 shows a handheld power tool 100, which is preferably designed as a router, in particular as an edge router. In this case, the handheld power tool 100 preferably has a rod-shaped housing 110 with a first and second axial end 101, 103, which has a first and a second housing section 112, 152. The first housing section 112 is preferably arranged in the area of the first axial end 101 and the second housing section 152 is arranged in the area of the second axial end 103.

The first housing section 112 is preferably designed to at least partially accommodate at least one energy supply unit 165. The energy supply unit 165 is preferably designed as an exchangeable battery pack 160. The battery pack 160 is preferably an 18V battery pack, the battery pack 160 having a nominal voltage of 18V. It is pointed out, however, that the power supply unit 165 can also be wired and e.g. can be formed with a power line.

An electronics unit 170 is preferably arranged in the first housing section 112. Furthermore, a handle is illustratively on the first housing section 112 area 120 formed. In this case, the grip area 120 preferably has a hand rest area 122 for at least partial palm rest and a grip waist 124. The grip waist 124 is preferably assigned a grip stop 126 which is arranged adjacent to the hand rest area 122. The grip waist 124 can preferably be grasped around at least essentially one hand by a user of the handheld power tool 100, in particular with an index finger 192 and a thumb 191.

In addition, the grip area 120 is preferably designed to limit the formation of a grip angle a between a wrist of a user gripping the grip area 120 and a workpiece 102 to be processed to a value between 20 ° and 50 °, preferably 30 °. The angle a is preferably formed between an axis 104, which is formed by a forearm 190 of the user, and the workpiece 102. The user's wrist or hand is preferably arranged at a 0 ° angle to the forearm 190, i. preferably not pivoted and / or not bent. As an example, the angle a relates to an average tall user with a height of about 1.75 m, who is standing up with a worktop height of about 80 cm to 90 cm, for example milling an edge, with a corresponding one in the longitudinal direction 199 des Rod-shaped housing 110 aligned device axis is arranged almost vertically.

The drive motor 150 for driving an insert tool is preferably arranged in the second housing section 152. According to one embodiment, the drive motor 150 is an electronically commutated motor. An on / off switch 155 of the drive motor 150 is preferably arranged opposite the grip waist 124. Thus, the on / off switch 155 can preferably be operated with the index finger 192 when reaching around the grip area 120. Furthermore, the arrangement of the drive motor 150 in the second housing section 152 enables a stable design of the handheld power tool 100, since the center of gravity can be shifted in the direction of the second axial end 103 by the arrangement of the drive motor 150, thereby making it easy to use.

The second housing portion 152 preferably has a first perimeter 137 and the grip waist 124 has a second perimeter 127. Here is the first circumference 137 assigned to a machine housing 130 assigned to the second housing section 152. The second circumference 127 is preferably smaller than the first circumference 137. The second circumference 127 is preferably between 155 mm and 180 mm, preferably 173 mm. Here, the scope is understood to mean the area where the fingers 191, 192 and hand elements can be positioned.

Furthermore, the machine housing 130 is provided, for example, which is connected to the rod-shaped housing 110 on the second housing section 152. In this case, a guide device 180 is preferably attached to the machine housing 130, which is designed to enable the handheld power tool 100 to be supported on a workpiece 102 to be machined.

The guide device 180 is preferably designed as a milling basket 140. The guide device 180 is preferably adjustable in height. In addition, the guide device 180 preferably has at least one recess 145 for the arrangement of a hand of a user that cannot be arranged on the grip area 120.

It is pointed out, however, that the configuration of the guide device 180 is only an example and should not be seen as a limitation of the invention. Thus, the guide device 180 can be designed as an edge milling module, angle milling module and / or router module.

A longitudinal axis 402 of the grip waist 124 oriented in the longitudinal direction 199 of the rod-shaped housing 110 is preferably arranged at least approximately parallel and at a predetermined axial distance x to a longitudinal axis 404 of the drive motor 150 oriented in the longitudinal direction 199 of the rod-shaped housing 110. The longitudinal axis 404 of the drive motor 150 is preferably a longitudinal axis of the drive axis 370 and the output axis 340 of the drive motor 150.

The hand rest area 122 is preferably aligned at a predetermined angle c to the longitudinal direction 199 of the rod-shaped housing 110. The angle c is preferably greater than 90 °. In this case, an at least approximately L-shaped grip area 120 is illustratively formed, with one of the first end 101 facing portion of the grip area 120 is formed in the longitudinal direction 199 of the stabför-shaped housing 110 and a portion facing the second end 103 is arranged at angle c and the hand rest area 122 ausbil det.

Furthermore, the handle stop 126 is preferably assigned a longitudinal axis 406 which is aligned in the longitudinal direction 199 of the rod-shaped housing 110 and which runs in the direction of the rod-shaped housing 110 through the handle stop 126. The longitudinal axis 406 is arranged at least approximately parallel and at a predetermined distance y from the longitudinal axis 404 of the drive motor 150. The handle stop 126 is preferably designed to stop the hand of the user of the handheld power tool 100 and to enable the handheld power tool 100 to be guided in a preferred working direction. For this purpose, the handle stop 126 is preferably formed in a work direction, illustratively to the left in FIG. 1. The hand-held power tool 100 is guided during a work process via a pressure force from the arm of the user without a large gripping force being required.

FIG. 2 shows the guide device 180 of FIG. 1, which is preferably designed as a milling cage 140. FIG. 2 illustrates the preferably two recesses 145 for the arrangement of two fingers of a user of the handheld power tool 100 of FIG. 1. The recesses 140 are preferably arranged opposite one another. Such recesses 140 are sufficiently known from the prior art, so that a detailed description of the recesses 140 is dispensed with here for the sake of brevity and simplicity of the description.

FIG. 3 shows handheld power tool 100 from FIG. 1. The electronics unit 170 is arranged in the first housing section 112, as described above. A contact plate 311, electronic components 312, an operating and display unit 313 and / or a communication unit 314 are preferably assigned to the electronic unit 170. In addition, the handheld power tool 100 can have further functional units, e.g. a lighting unit for illuminating a workpiece to be machined.

Furthermore, FIG. 3 illustrates the guide device 180 from FIGS. 1 and 2 with the milling cage 140, which is attached to the machine housing via a clamping lever 320 130 is arranged. In addition, a depth setting 360 is provided, which is designed to set a working depth of the tool insert of the handheld power tool 100. The drive motor 150 with its drive shaft 370 and its output shaft 340 is also shown in FIG. 3. A fan 330 is preferably assigned to the output shaft 340. The output shaft 340 is preferably connected to a collet 350.

The collet 350 is preferably designed to receive an insert tool, in particular a milling tool. The drive is preferably designed as a direct drive. In this context, a direct drive is understood to mean a drive which does not further reduce or increase the movement of the drive motor 150, the output shaft 340 and the drive shaft 370 preferably being arranged one above the other or being arranged in series. Alternatively, a clutch can be integrated between the drive motor 150 and the output. The axes are preferably, i.e. the drive axle 370 and the output axle 340, formed coaxially or firmly connected to one another via a press connection.

4 shows the second housing section 152 of the handheld power tool 100 from FIGS. 1 and 3. FIG. 4 illustrates the longitudinal axis 402 of the grip waist 124, which is preferably at least approximately parallel and at a given axial distance x from the longitudinal axis 404 of the Drive motor 150 is arranged. In addition, FIG. 4 shows the longitudinal axis 404 of the drive motor 150, which is preferably a longitudinal axis of the drive axis 370 and the output axis 340 of the drive motor 150. Furthermore, the longitudinal axis 406, which is preferably assigned to the handle stop 126, is shown, the longitudinal axis 406 running in the direction of the elongated housing 110 illustratively through the handle stop 126.

According to one embodiment, there is at least a ratio in the range from 1: 1 to 1: 2, preferably 1: 4, between the predetermined axial spacing x and the predetermined distance y. A deviation of +/- 20%, in particular +/- 10%, is assigned to the ratio.

In addition, the handle stop 126 is preferably assigned a handle height H which preferably has a value between 100 mm and 190 mm. However, the handle height H is preferably variably adjustable in order to adjust the depth to realize. Preferably, an adjustment range for depth adjustment between 20 mm and 60 mm, in particular less than or equal to 30 mm, can be set.

It should be noted that all of the numerical values mentioned above are only examples and should not be seen as a restriction of the invention. In this way, the numerical values mentioned can also be converted as required in the specified ranges.

Claims

Expectations

1. Hand power tool (100), in particular a router, with a stabför shaped housing (110) which has a first and a second housing section (112, 152), the first housing section (112) for at least partial accommodation of at least one power supply unit (165), in particular a replaceable battery pack (160), is formed and a grip area (120) is formed on the first housing section (112), and a drive motor (150) for driving an insert tool is arranged in the second housing section (152) is, characterized in that the grip area (120) has at least one palm rest area (122) for at least partial palm rest and a grip waist (124), the grip waist (124) being at least used by a user of the hand tool (100) can essentially be grasped with one hand, in particular with an index finger (192) and thumb (191), one being aligned in the longitudinal direction (199) of the rod-shaped housing (110) Ended longitudinal axis (402) of the handle waist (124) at least approximately parallel and at a predetermined center distance (x) to a longitudinal axis (404) of the drive motor (150) aligned in the longitudinal direction (199) of the stabför-shaped housing (110) is, and wherein the hand support area (122) is aligned at a predetermined angle (c) to the longitudinal direction (199) of the rod-shaped housing (110).

2. Hand tool according to claim 1, characterized in that the handle area (120) is designed to set a formation of a Griffwin angle (a) between a wrist of a user gripping the handle area (120) and a workpiece to be machined (102) to a value between 20 ° and 50 °, preferably 30 °, to be restricted.

3. Hand tool according to claim 1 or 2, characterized in that the second housing portion (152) has a first circumference (137) and the grip waist (124) has a second circumference (127), wherein the second circumference (127) is smaller than the first circumference (137).

4. Hand machine tool according to claim 3, characterized in that the second circumference (127) has a value between 155 mm and 180 mm, before given to 173 mm.

5. Hand tool according to one of the preceding claims, characterized in that the handle waist (124) is assigned a handle stop (126) which is arranged adjacent to the hand rest area (122), the handle stop (126) having a longitudinal axis (406) ), which is aligned in the longitudinal direction (199) of the rod-shaped housing (110), which runs in the direction of the rod-shaped housing (110) through the handle stop (126) and which is at least approximately parallel and at a predetermined distance (y) to Longitudinal axis (404) of the drive motor (150) is arranged.

6. Hand machine tool according to claim 5, characterized in that there is at least a ratio in the range from 1: 1 to 1: 2, preferably 1: 4, between the predetermined center distance (x) and the predetermined distance (y).

7. Hand machine tool according to claim 6, characterized in that a deviation of +/- 20%, in particular +/- 10%, is assigned to the ratio.

8. Hand machine tool according to one of claims 5 to 7, characterized in that the handle stop (126) is assigned a handle height (H) which has a value between 100 mm and 190 mm.

9. Hand machine tool according to one of the preceding claims, characterized in that the drive motor (150) is an electronically commutated motor.

10. Hand tool according to one of the preceding claims, characterized in that a machine housing (130) is provided which is connected to the rod-shaped housing (110) on the second housing section (152) and to which a guide device (180) is attached, which is designed to enable the handheld power tool (100) to be supported on a workpiece (102) to be machined.