EP3124179A1 - Hand installation tool for a motor flange and system with an hand installation tool - Google Patents

Abstract

A hand assembly tool for connecting a motor flange to and disconnecting the motor flange from a hand tool transmission, the motor flange having at least one spring tab by means of which the motor flange can be locked or unlocked on the hand tool gearbox, the hand mounting tool being in a mating position coaxial with an axis of rotation of the motor flange to the motor flange such that the spring tab is received within a volume of the hand assembly tool, the hand assembly tool having at least one in-volume ramp formed to rotate about the axis of rotation of the motor flange and toward a release position as the hand assembly tool rotates; to deflect the spring tab of the motor flange axially to the axis of rotation and to unlock the motor flange via a rotary drive formed on the ramp.

Description

The present invention relates to a hand assembly tool for connecting a motor flange with and for disconnecting the motor flange from a hand tool transmission. The hand tool gear, for example, be a gearbox of a hammer drill, combi hammer or a feed device for a core drill. The motor flange has at least one spring tab by means of which the motor flange can be locked or unlocked on the hand tool transmission. The invention also relates to a system with a hand assembly tool and with a motor flange.

A manual assembly tool of the type mentioned, for example, a pair of pliers or the like, which is conceivable unsuitable for connecting or disconnecting a motor flange of a hand tool gear.

It is an object of the present invention to provide a hand assembly tool that is easy and safe to handle.

With respect to the manual assembly tool, the object is achieved in that the manual assembly tool can be attached to the motor flange in a fitting position coaxial with an axis of rotation of the motor flange, such that the spring tab is received within a volume of the manual assembly tool. The hand-assembly tool has at least one in-volume ramp adapted to deflect the spring tab of the motor flange axially of the rotation axis of the hand-held mounting tool about the rotational axis of the motor flange and toward a release position, and the motor flange via a ramp formed on the ramp To unlock the rotary drive.

The invention includes the recognition that a hand tool transmission is typically supplied by the supplier as an assembly with a mounted motor flange. Since a hand tool motor can typically only be mounted on the motor flange from the concealed rear side, the motor flange must first be dismantled. For this purpose, two spring tabs, which may consist of plastic, raised and turned the motor flange until it can be removed axially from the hand tool gearbox.

The invention further includes the knowledge that by manually lifting and holding the spring tabs with the fingers while rotating the motor flange handling is extremely difficult and unsuitable for series assembly. Furthermore, there is a risk that the typically made of plastic spring straps are overstretched and thus pre-damaged. This can disadvantageously lead to a failure of a hand tool in which the motor flange is installed.

The hand-held tool provided according to the invention avoids the described disadvantages. According to the invention, a manual assembly tool is provided in the sense of an assembly aid, which serves to connect and disconnect the motor flange easily and quickly with a hand tool transmission. In this case, the operation of the manual assembly tool is done manually, that is, the manual assembly tool is placed by hand on the motor flange and fastened by means of a rotary motion on an end face of the hand tool gear. Thus, the manual assembly tool is both simple and safe to handle.

In a preferred embodiment, the rotational drive is designed as a step. The step can serve as a stop for the spring tab and / or as a stop for a rigid portion of the spring tab. A rotational drive configured as a step may divide the ramp into a lower ramp section and an upper ramp section. Preferably, the ramp is formed spirally with respect to the axis of rotation of the motor flange.

Turning the hand-held tool set in the start position gradually deflects the spring tab through the ramp. By trained on the ramp rotational drive finally loosening or unlocking the spring tab of a corresponding counterpart of the hand tool gear.

In a particularly preferred embodiment, the upper portion is adapted to deflect the spring tab. The lower ramp portion may be configured to support a rigid portion, via which the spring tab is formed on the motor flange, in the course of rotation of the manual assembly tool. In other words, a two-part ramp so on the one hand, the deflection of the spring tab, which is required to unlock the motor flange cause. On the other hand, the rigid section of the spring clip can be supported by a two-part ramp, so that a particularly safe and damage-free removal of the motor flange is possible.

In a further preferred embodiment, the lower ramp section has a smaller pitch than the upper ramp section. The lower ramp section and / or the upper Ramp section can have a progressive slope. A progressive pitch is in this case related to a rotation which serves to release the motor flange of the hand tool gear.

Preferably, the manual assembly tool is designed such that a counterclockwise rotation of the manual assembly tool about the axis of rotation of the motor flange means a release of the motor flange.

In a particularly preferred embodiment, the manual assembly tool is cylindrical. The diameter of the cylindrically shaped manual assembly tool is preferably twice as large as the height of the cylindrically shaped manual assembly tool. Preferably, the diameter of the cylindrically shaped hand assembly tool is between 7 cm and 10 cm. The height can be between 2 cm and 4 cm. Particularly preferably, the diameter of the manual assembly tool is greater than the diameter of the motor flange, preferably based in each case on the intended rotation axis.

In a preferred embodiment, the manual assembly tool made of plastic or has such.

It has proven to be advantageous if a central support ring is formed in the manual assembly tool, which serves as a sliding bearing between the hand-mounting tool and the motor flange. The central support ring may be provided, for example, by cropping a surface of the manual assembly tool. This can be realized, for example, by one or more arcuate sections or recesses on the top of the hand-assembly tool.

It has proven to be advantageous if the manual assembly tool has two ramps, preferably exactly two ramps. The ramps can be arranged diametrically opposite each other. Preferably, the motor flange has two, in particular exactly two spring tabs, which can be arranged diametrically opposite one another.

The spring tab may be locked to a corresponding to the spring tab counterpart of the hand tool gear when the motor flange is attached to the manual assembly tool transmission. The spring tab and the corresponding counterpart preferably form a connection in the sense of a bayonet closure.

With respect to the system, the object is achieved by a system with a hand-held tool as described above and with a motor flange, wherein the motor flange has at least one spring tab, by means of which the motor flange locks on the hand tool gearbox or can be unlocked. The system may be further developed by the features described with reference to the manual assembly tool.

Further advantages will become apparent from the following description of the figures. In the figures, a preferred embodiment of the present invention is shown. The figures, the description and the claims contain numerous features in combination. The skilled person will conveniently consider the features individually and summarize meaningful further combinations.

In the figures, identical and similar components are numbered with the same reference numerals.

Fig. 1

ein Ausführungsbeispiel eines erfindungsgemäßen Handmontagewerkzeugs;

Fig. 2

das Handmontagewerkzeug der Figur 1 in Ansetzposition;

Fig. 3

das Handmontagewerkzeug der Figur 1 kurz vor der Löseposition;

Fig.4

eine typische Abfolge beim Trennen des Motorflansches von einem Handwerkzeuggetriebe.

Show it:

Fig. 1

an embodiment of a hand assembly tool according to the invention;

Fig. 2

the hand assembly tool the FIG. 1 in start position;

Fig. 3

the hand assembly tool the FIG. 1 just before the release position;

Figure 4

a typical sequence when separating the motor flange of a hand tool gearbox.

Embodiment:

In the upper part of FIG. 1 an inventive hand assembly tool 10 is shown in a perspective view from above. The manual assembly tool 10 is provided for connecting a motor flange 20 with and for disconnecting the motor flange 20 from a hand tool transmission 30. In the illustrated embodiment, the motor flange 20 is attached to the hand tool gear 30. The manual assembly tool 10, which is presently cylindrical, has on an outer periphery a handle portion 17 which is intended to be held by a human hand. The handle portion 17 is grooved to facilitate the operation.

Like the same FIG. 1 can be removed, a central support ring 15 is formed in the manual assembly tool 10, which serves as a sliding bearing between the manual assembly tool 10 and the motor flange 20 when the hand-mounting tool 10 is placed on the motor flange 20. In this case, the central support ring 15 rests on a support region 25 of the motor flange 20.

The motor flange 20 has exactly two spring tabs 21, 23. The spring tabs 21, 23 are arranged diametrically opposite each other. The spring tabs 21, 23 are integrally formed on the motor flange 20 via a respective rigid section 21 ', 23'.

In the illustrated embodiment, the motor flange 20 is made of plastic. The spring tabs 21, 23 are axially deflectable to the axis of rotation R of the motor flange 20. This is indicated by respective arrows on the first spring tab 21 and the second spring tab 23. An axial deflection of the spring tabs 21, 23 is elastic. In FIG. 1 are the spring tabs 21, 23 of the motor flange 20 in the non-deflected state.

Like the same FIG. 1 can be removed, the hand tool gear 30 has at its periphery to the spring tabs 21, 23 corresponding counterparts 31, 33, by means of which the motor flange 20 is locked to the hand tool gear 30 in the sense of a bayonet lock. It is in FIG. 1 the locked state shown.

In FIG. 2a the hand assembly tool 10 is shown in a plan view. It is in FIG. 2a the section line A - A drawn. FIG. 2b shows the corresponding section A - A.

In FIG. 2 the manual assembly tool 10 is shown in the so-called attachment position AP. The attachment position AP shown allows attachment of the manual assembly tool 10 on the motor flange 20, so that the spring tabs 21, 23 are received within a volume of the present case cylindrical-shaped manual mounting tool 10.

Present are in FIG. 2a the spring tabs 21, 23 by two arcuate portions 15 'in the top of the manual assembly tool 10 through recognizable. By the arcuate portions 15 ', as it were, the central support ring 15 is formed, which acts as a sliding bearing between the manual assembly tool 10 and the motor flange 20.

Two ramps 11, 13 formed on the manual assembly tool 10 can be seen through the arcuate sections 15 '. The ramps 11, 13 serve for axial deflection of the spring tabs 21, 23.

Recognizable within the arcuate portions 15 'are also formed on the ramps 11, 13 rotary driving 12, 14. The rotational driving form stops for the spring tabs 21, 23 and their rigid portions 21', 23 '. This will be referred to later FIG. 3 more precisely.

In FIG. 2a illustrated embodiments, the rotary driving 12, 14 are formed as a step, the ramps 11, 13 in a lower ramp section 11 ', 13' and an upper ramp section 11 ", 13" subdivide. The upper ramp sections 11 ", 13" serve to deflect the spring tabs 21, 23. The lower ramp sections 11 ', 13' are designed to support the rigid sections 21 ', 23'. The spring tabs 21, 23 formed on the motor flange 20 via the rigid portions 21 ', 23'.

In the sectional view A - A in FIG. 2b is easy to see how the second spring tab 23 is locked to the corresponding counterpart 33 of the power tool gear 30. In this case, the corresponding counterpart 33 is located between the second spring clip 23 and the second rigid section 23 '.

Also off FIG. 2b the lower ramp section 11 'of the first ramp 11 can be seen.

The direction of rotation DR, in which the manual assembly tool for releasing the motor flange 20 has to be rotated in the counterclockwise direction, is designated by the corresponding arrow.

FIG. 3 now shows the embodiment of FIGS. 1 and 2 , wherein a rotation DR of the manual mounting tool 10 has taken place about the rotation axis R in the direction of a release position LP. It shows FIG. 3 not the final release position, but a rotational position of the manual assembly tool 10 just before this assumes the release position. This is for example in FIG. 3b characterized in that the second rigid portion 23 'of the motor flange 20th not yet applied to the designed as a stage rotational drive 14. That would be the case, would that be in FIG. 3 shown manual assembly tool 10 are further rotated in the direction of rotation DR.

In FIG. 3a is a section line B - B drawn, the section B - B in FIG. 3b is shown. Again FIG. 3b can be removed, the second spring tab 23 of the motor flange 20 is already on the upper ramp portion 13 "befindlich and accordingly axially deflected to the rotation direction R.

By further rotation of the manual assembly tool 10 in the direction of rotation DR, the second spring clip 23 would be deflected further in the direction of the arrow, since the second spring clip 23 would be moved further along the ascending upper ramp section 13 " in contact with the rigid portion 23 'of the motor flange 20, the motor flange 20 is fully unlocked and can be removed axially in the direction of the arrow from the hand tool gearbox.

FIG. 4 Finally, shows a typical procedure when separating the motor flange 20 from the hand tool transmission 30 by means of the hand assembly tool 10 according to the invention.

First, the manual assembly tool 10 is mounted axially in the attachment position AP on the motor flange or plugged. In this case, the motor flange 20 is received within a volume of the manual assembly tool 10.

As in FIG. 4b is shown, by rotating the manual assembly tool 10 in the direction of rotation, which corresponds counterclockwise, the motor flange 20 is unlocked from the power tool transmission. This is done as described above, characterized in that the two spring tabs 21, 23 via the spirally and diametrically opposed ramps 11, 13 and their upper ramp sections 11 ", 13" are raised and unlocked on the ramps 11, 13 formed rotary driving 12, 14 become (compare FIG. 3 ).

Subsequently, this is in Figure 4c shown, the manual assembly tool 10 are lifted axially upward in the arrow direction, the separate motor flange 20 due to the appropriately designed ramps 11, 13 remains within the manual assembly tool 10.

Finally, how can FIG. 4d it can be seen, the motor flange 20 are removed by a counter rotation of the manual assembly tool 10.

Similarly, by an opposite approach, that is starting with FIG. 4d and an insertion of the motor flange 20 in the manual assembly tool 10 connecting the motor flange 20 with the manual assembly tool 30 possible.

LIST OF REFERENCE NUMBERS

10

Hand assembly tool

11

First ramp

12

First rotary drive

13

Second ramp

14

Second rotary drive

15

Central support ring

17

handle portion

20

motor flange

21

First spring tab

23

Second spring tab

25

support area

30

Hand Tools Transmission

31

First counterpart

33

Second counterpart

11 '

First lower ramp section

21 '

First rigid section

13 '

Second lower ramp section

15 '

arcuate sections

23 '

Second rigid section

11 "

First upper ramp section

13 "

Second upper ramp section

D

diameter

H

height

R

Rotation axis of the motor flange

AP

ramming

DR

direction of rotation

LP

release position

Claims (10)

A hand assembly tool (10) for connecting a motor flange (20) to and separating the motor flange (20) from a hand tool transmission (30), the motor flange (20) having at least one spring tab (21,23) by means of which the motor flange (20) abuts the hand tool gearbox (30) can be locked or unlocked,
characterized in that the hand assembly tool (10) in a fitting position (AP) coaxial with an axis of rotation (R) of the motor flange (20) to the motor flange (20) can be applied, such that the spring tab (21, 23) within a volume the hand-assembly tool (10) has at least one in-volume ramp (11, 13) which is formed in the course of a rotation (DR) of the hand-mounting tool (10) about the axis of rotation (R). the motor flange (20) and in the direction of a release position (LP) to deflect the spring tab (21, 23) of the motor flange (20) axially to the axis of rotation (R) and the motor flange (20) via a on the ramp (11, 13) formed Rotational drive (12, 14) to unlock. Hand assembly tool according to claim 1,
characterized in that the rotational drive (12, 14) is formed as a step, the ramp (11, 13) in a lower ramp section (11 ', 13') and an upper ramp section (11 ", 13") divided. Hand assembly tool according to claim 2,
characterized in that the upper ramp portion (11 ", 13") is adapted to deflect the spring tab (21, 23) and the lower ramp portion (11 ', 13') is formed to have a rigid portion (21 ', 23'), via which the spring tab (21, 23) is integrally formed on the motor flange (20), in the course of the rotation of the manual assembly tool (10) support. Hand assembly tool according to claim 2 or 3,
characterized in that the lower ramp section (11 ', 13') has a smaller pitch than the upper ramp section (11 ", 13"). Hand assembly tool according to one of claims 2 to 4,
characterized in that the lower ramp section (11 ', 13') and / or the upper ramp section (11 ", 13") has a progressive pitch. Hand assembly tool according to one of the preceding claims,
characterized in that the hand assembly tool (10) is cylindrical, wherein the diameter (D) of the cylindrically shaped hand-mounting tool (10) is preferably twice as large as the height (H). Hand assembly tool according to one of the preceding claims,
characterized in that in the manual assembly tool (10) a central support ring (15) is formed, which serves as a sliding pivot bearing between the manual assembly tool (10) and the motor flange (20). Hand assembly tool according to one of the preceding claims,
characterized in that the spring tab (21, 23) with a corresponding to the spring tab counterpart (31, 33) of the hand tool gearbox (30) is locked when the motor flange (20) on the hand tool gearbox (30) is attached Hand assembly tool according to one of the preceding claims,
characterized in that the manual assembly tool (10) has exactly two ramps (11, 13) which are arranged diametrically opposite each other and / or the motor flange (20) has exactly two spring tabs (21, 23) which are arranged diametrically opposite one another. System with a hand-mounting tool according to one of the preceding claims and with a motor flange, wherein the motor flange (20) has at least one spring tab (21, 23) by means of which the motor flange (20) can be locked to the hand tool transmission (30).

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