ES2848731T3 - Hand tool and method for making a hand tool - Google Patents

Abstract

Manual tool (1) with a handle (2) and with a tool part (4), where the handle (2) has a housing (12) for receiving a motor (8) and where the tool part (4) is rotatable around a longitudinal axis (6) of the hand tool (1) by means of a drive installation (10) that has the motor (8), characterized in that the motor (8) is arranged in the housing (12) with a clearance, wherein a free space (14) defined by the clearance between the motor (8) and the housing (12) and a control electronics (20) of the drive installation (10) are fused with a melt (16).

Description

DESCRIPTION

Hand tool and method for making a hand tool

The invention relates to a hand tool with a handle and a tool part, wherein the handle has a housing for receiving a motor and where the tool part is rotatable around a longitudinal axis of the hand tool by means of a drive installation featuring the motor.

The invention further relates to a method for the manufacture of a hand tool having at least the characteristics of the hand tool described at the beginning.

A hand tool of the type mentioned at the beginning is known from DE 102015 205 122 A1. According to the state of the art, it is usual to adapt the motor in the housing in such a way that a fixed seat of the motor in the housing in the handle is achieved.

Publication US 5017109 A discloses a pneumatic tool, in which an injected power cylinder is arranged in a cylindrical outer casing. The motor cylinder is threaded for fixing.

The invention has the task of creating an alternative fixing possibility of the motor.

For the solution of the task, the characteristics of claim 1 are provided. In particular, in this way, for the solution of the proposed task it is proposed according to the invention in a manual tool of the type mentioned at the beginning that the motor is arranged in the housing with a clearance, wherein a clearance defined by the clearance is fused between the motor and the housing with a melt.

In this way, the invention can achieve an impact damping of the engine against mechanical loads and / or a clogging of the engine.

Thus, according to the state of the art, for example, a weak point can be formed for activating the motor, through which moisture can enter. This can be prevented through the invention.

The hand tool can be configured, for example, as a screwdriver. However, the manual tool can be any other hand-operable tool, in which a tool part has to be realized in order to carry out a rotary movement.

The tool part can be a machining element such as a tool blade. This is inserted or can also be inserted in a knife holder that, in turn, can be engaged with the handle. The tool part can also be provided by the knife holder or also by the knife holder mechanically connected with a knife. The tool part can therefore also be an adapter part such as a knife holder, a drill holder or a bit holder, or also another tool element such as a torque limiter, for example. . The tool part can be made up of a single part or it can also be made up of several individual parts.

The tool part can be mechanically connected to the handle in such a way that it cannot be replaced. In other configurations, the tool part may be replaceable. In particular, it can be removed from the handle and / or it can be removed from it.

It may be provided that the tool part is arranged at one end of the handle on the tool side. In this case, the tool part can be arranged directly on the handle or it can also be at a distance from the handle, another element being arranged between the tool piece and the handle, which is in operative connection both with the handle and also with the handle. tool part.

The tool part can be inserted or is inserted into the handle. The tool piece can be rotatable in front of the handle.

In a configuration of the hand tool according to the invention, provision can be made for the housing to form a hollow space, within which the entire motor is arranged. This can be advantageous, since in this way the motor can be better protected against mechanical damage and / or damage from the environment of the hand tool.

According to the invention, in the hand tool it is provided that a control electronics of the drive system is fused with the melt. It can also be provided that the entire drive device is fused with the melt. In this way, in addition to the motor, also another important element of the drive installation or even the entire drive installation can be protected.

In another configuration of the hand tool according to the invention, provision can be made for the melt to form exactly one spatial assembly. This can have, for example, the advantage that the manufacture of the hand tool can thereby be facilitated. Such a space assembly can be manufactured through a single casting process. A spatial assembly can also improve shock absorption and / or tightness, since several cast areas separated from each other can lead to areas of the partially cast parts being particularly exposed to a mechanical load and / or accessibility to a fluid.

To improve shock absorption and / or sealing, in another configuration of the hand tool of the invention it can be provided that the melt envelops the motor and / or the control electronics and / or the entire drive system without gaps.

In order to prevent a rotation of the motor, in another configuration of the hand tool according to the invention it can be provided that the motor is of non-round configuration. Alternatively or additionally, provision can be made for the housing to be of non-round design. Preferably, the motor and / or the housing are non-round in a plane oriented perpendicular to the longitudinal axis. This can be particularly advantageous, since in this plane a rotation of the motor in the housing is a particular threat. It can be particularly advantageous if the non-round configuration of the motor is configured in such a way that it is adapted to the non-round configuration of the housing in the play housing. To this end, the non-round configuration of the motor may correspond in particular to the non-round configuration of the housing.

For the solution of said task, the characteristics of the dependent claim, related to a procedure, are also provided. In particular, in this way, in order to solve said task, it is proposed according to the invention in a method of the type described at the beginning that the motor is arranged in the housing of the handle with a set and that a free space defined by the clearance between motor and housing with molten mass. Through this process a hand tool can be manufactured in a simple way, which is more robust against mechanical loads and / or is better sealed than conventional hand tools of the type described at the beginning. In this way, by means of said method, a hand tool can be produced in particular, which is configured according to the invention in particular as described above and / or according to one of the protection claims relating to a hand tool.

In order to simplify the production of the tool and / or to improve the properties of the tool, the method according to the invention provides that a control electronics of the drive system is founded with a melt. Alternatively or additionally, provision can be made for the entire drive device to be fused with the melt. Preferably, the casting of the free space and / or the drive unit and / or the motor and / or the control electronics is carried out in a common casting process.

The invention is now described in detail with the aid of one or a few exemplary embodiments, but it is not limited to these few exemplary embodiments. Other exemplary embodiments result through the combination of the characteristics of some or more protection claims with each other and / or with some or more characteristics of the exemplary embodiments.

Figure 1 shows an example of embodiment of a hand tool 1 according to the invention.

Figure 2 shows the hand tool 1 according to Figure 1 with a torque insert 24 inserted.

Figure 1 and Figure 2 show an example of embodiment of a hand tool 1 configured according to the invention as a screwdriver with a handle 2 and with a tool part 4 that can be rotated opposite the handle 2 and configured as a drill housing 22. Tool 4 is arranged directly at one end of the handle 2 on the side of the tool 2. The tool part 4 is not replaceable. In an alternative embodiment, the tool part 4 is, however, replaceable and thus it can be removed from the handle or it can be pulled out of the handle. In FIG. 2, a torque supplement 24 is inserted into the bit housing 22. For the actual use, for example, a tool bit not shown, an adapter piece or a blade can then be inserted. of tool in the bit holder 22 in the torque insert 24. In this way, the tool blade can then also be rotated relative to the handle 2.

As can be seen from FIG. 1, the area of the motor 8 and the control electronics 20, which respectively form a part of the drive system 10, are represented in open section.

A longitudinal axis 6 is configured in the hand tool 1. This longitudinal axis 6 forms the median axis of the hand tool 1 and at the same time a rotational axis, around which the tool part 4 can rotate.

To this end, the hand tool 1 has the motor 8, which is inserted in the housing 12 of the handle 2. The housing 12 in this case forms a hollow space 18, in which the motor 8 is completely contained. The motor 8 is controlled by the control electronics 20. In this case, the motor 8 and the control electronics 20 form a part of the drive system 10. With the motor 8, a shaft not shown in FIG. 1 and FIG. 2 can be driven, which is in operative connection with the tool part 4 in such a way that a rotation of the shaft causes a corresponding rotation of the tool part 4. If, for example, a screwdriver blade is inserted into the tool part 4, then a It can perform the threading process through caused rotation.

The motor 8 is powered by a battery, which is arranged in a handle section on the user side inside the handle 2. In Figure 1 and Figure 2 the battery covered by the handle surface and therefore , it is not visible.

In the hand tool 1, a hollow space 14 is formed between the housing 12 and the outer casing of the motor 8, which is fused with a melt 16. The motor 8 thus has an outer diameter transversely to the axis of rotation, which it is slightly smaller than the inside diameter of the housing 12, so that a clearance remains between the motor 8 and the housing 12. In this case, the motor 8 and the housing 12 are configured non-round. In the exemplary embodiment according to FIG. 1 and FIG. 2, the motor 8 and the housing 12 are configured elliptically in a plane perpendicular to the longitudinal axis 6.

In the exemplary embodiment shown in FIG. 1 and FIG. 2, the motor 8 is enclosed without gaps by the melt 16. Furthermore, together with the motor 8, the control electronics 20 are fused with the melt 16. This is performed in a common casting process, so that the melt 16 forms a common assembly. The melt 16 therefore does not decompose into several zones, but each melt zone is melt-bonded to another melt zone of the melt 16.

It is proposed to arrange in a motor-driven hand tool 1 the motor 8 in a housing 12 of the handle 2 of the hand tool 1 with a clearance, a clearance 14 defined by the clearance between the motor 8 and the housing 12 being cast with a melt 16.

List of ■ reference signs

1 hand tool

2 Handle

4 Tool part

6 Longitudinal axis

9 Engine

10 Drive installation

12 Accommodation

14 Free space

16 Melt

18 Hollow space

20 Control electronics

22 Bit housing

24 Torque supplement

Claims (7)

1. Manual tool (1) with a handle (2) and with a tool part (4), where the handle (2) has a housing (12) for receiving a motor (8) and where the piece of tool (4) is rotatable around a longitudinal axis (6) of the hand tool (1) by means of a drive installation (10) that has the motor (8), characterized in that the motor (8) is arranged in the housing (12) with a clearance, where a free space (14) defined by the clearance between the motor (8) and the housing (12) and a control electronics (20) of the drive installation (10) they are fused with a melt (16). Hand tool (1) according to the preceding claim, characterized in that the housing (12) forms a hollow space (18), within which the entire motor (8) is arranged. Hand tool (1) according to one of the preceding claims, characterized in that the drive device (10) is fused with the melt (16). Hand tool (1) according to one of the preceding claims, characterized in that the melt (16) forms exactly one spatial assembly and / or that the melt (16) seamlessly surrounds the motor (8) and / or the control electronics (20) and / or the drive installation (10). Hand tool (1) according to one of the preceding claims, characterized in that the motor (8) and / or the housing (12) are non-round, in particular where the motor (8) and / or the housing (12 ) are configured non-round in a plane oriented perpendicular to the longitudinal axis (6). 6. Method for manufacturing a hand tool (1) according to the preamble of claim 1, especially according to one of the preceding claims, characterized in that the motor (8) is arranged in the housing (12) of the control (2) with a clearance and because a free space (14) defined by the clearance between the motor (8) and the housing (12) and a control electronics (20) of the drive system (10) are fused with a mass cast (16). Method according to the preceding claim, characterized in that the drive installation (10) is fused with the melt (16), especially where the casting of the free space (14) and / or the drive installation (10) and / or the motor (8) and / or the control electronics (16) is carried out in a common casting process.