Power tool system and method for connecting a vacuum cleaner to a power tool

Abstract

The present invention relates to a power tool system and method for connecting a vacuum cleaner to a power tool. The system comprises: a power tool having a tool; a vacuum cleaner for extracting dust generated when working with the power tool; a suction connection device, which is arranged between the tool and the power tool, and the suction connection device can be connected to the power tool because the toothed portion of the power tool can engage with the mating toothed portion of the suction connection device, and the suction connection device can be matched with the mating toothed portion in a manner that can set at least three tightening stages. In the first tightening stage, the handle and the suction connection device are fixed together; in the second tightening stage, they form a unit that can rotate relative to the power tool; in the third tightening stage, the suction connection device can rotate relative to the handle. The present invention advantageously enables the suction hose that connects the vacuum cleaner and the suction connection device together to be fixed relative to the handle. The angle between the suction hose and the handle can be set particularly easily.

Description

Technical Field

[0001] The present invention relates to a power tool system and method for connecting a vacuum cleaner to a power tool. The system comprises: a power tool having a tool; a vacuum cleaner for extracting dust generated when working with the power tool; and a suction connection, wherein the suction connection is arranged between the tool of the power tool and the power tool, and can be connected to the power tool by enabling the toothed portion of the power tool to engage with the mating toothed portion of the suction connection. The present invention enables a suction hose connecting the vacuum cleaner and the suction connection to be fixed relative to the handle of the power tool. In addition, the angle between the suction hose and the handle of the power tool can be set particularly easily. Background Art

[0002] Power tools such as core drills are known in the prior art, with which a drill core can be separated from a substrate. It is also known that dust generated when working with a power tool can be extracted from the working area of ​​the power tool with the help of a vacuum suction device in order to prevent the dust from entering the airways of a user of the power tool.

[0003] In particular, two concepts are known from the prior art which aim to achieve extraction of accumulated dust in the case of coring drills. According to a first concept, the dust is extracted via the shaft of the coring drill. A disadvantage associated with this concept is that, when extraction is carried out via the shaft of the coring drill, it is not possible to use a starting aid which can be fixedly mounted on the coring drill. A starting aid can be used, for example, at the front end of a coring drill bit or a sleeve cutter, which can be used as an alternative and cannot be fixedly mounted. However, such an alternative starting aid at the front end of a coring drill bit or a sleeve cutter is only inserted and, after drilling has started, must be removed when the drilling operation is to be continued. However, such a process is very time-consuming and labor-intensive and reduces the efficiency of the work when producing the core.

[0004] According to a second concept, it is proposed to extract the dust generated when working with a power tool through the rear wall of the tool of the power tool, such as a core drill or a sleeve cutter. However, a disadvantage associated with this second concept is that in the available solutions there is a gap between the power tool and the extraction. Thus, the suction hose connecting the tool and the vacuum suction device may sag in a random manner or under the effect of gravity, which can be very inconvenient in various applications and represents an undesirable imposition on the power tool user. Summary of the invention

[0005] It is therefore an object of the present invention to overcome the above-mentioned disadvantages of conventional coring drill systems and to prevent undesired sagging of the suction hose. A person skilled in the art will also appreciate that a system and method for connecting a vacuum suction device to a power tool can be provided, wherein the suction hose connecting the vacuum suction device and the power tool together can be fixed relative to the side handle of the power tool. Another object of the present invention is to provide a possible method of setting the angle between the suction hose and the handle of the power tool in a particularly simple manner.

[0006] The object is first achieved by a system for connecting a vacuum cleaner to a power tool, wherein the system comprises the following components:

[0007] - a power tool comprising a tool,

[0008] - a vacuum cleaner for extracting dust generated by the power tool,

[0009] - Suction connection.

[0010] The system is characterized in that the suction connection device is arranged between the tool of the power tool and the power tool, and because the tooth portion of the power tool can engage with the matching tooth portion of the suction connection device, the suction connection device can be connected to the power tool, and the tooth portion of the power tool and the matching tooth portion of the suction connection device are matched in a manner that can set at least three tightening stages, wherein, in a first tightening stage, the handle of the power tool and the suction connection device are basically fixed together; in a second tightening stage, the handle of the power tool and the suction connection device form a unit configured to be rotatable relative to the power tool; in a third tightening stage, the suction connection device is configured to be rotatable relative to the handle of the power tool.

[0011] An advantage associated with the invention is that the user can set the position of the suction hose relative to the power tool and relative to the side handle in a particularly simple manner as desired. As a result, the suction hose can be guided in a desired manner, wherein its position can be fixed or freely movable. Furthermore, the invention makes it possible to effectively prevent the suction hose from rotating about the drilling axis. According to the invention, it is very particularly preferred that the system can be used to connect a vacuum cleaner to a power tool.

[0012] The power tool can be, in particular, a coring drill, with which the core can be cut or separated from a substrate to be machined, such as rock, concrete or masonry. Accordingly, the tool of the power tool can be a coring drill bit or a sleeve cutter. When the power tool is formed by a coring drill, the proposed system can preferably be referred to as a coring drill system. Diamond fragments can be inlaid on the coring drill bit or the sleeve cutter to improve the cutting performance of the tool. Preferably, according to the present invention, the suction connection device can also be referred to as a suction head. The suction head is arranged between the tool of the power tool and the power tool, wherein, on the side facing the power tool, the suction connection device can have a mating tooth portion or a mating contour, which can cooperate with the tooth portion or contour of the power tool so that a connection is established between the suction head and the power tool. Preferably, the suction connection can also be considered as a connection between the power tool and the tool, which connection is especially designed to bridge a possible gap between one part, which is a coring drill, and another part, which is a coring drill bit and / or a sleeve cutter. In particular, according to the invention, it is preferred that the gap is bridged in order to fix the coring drill bit or the sleeve cutter. Such a bridge is not provided in both extraction concepts of coring drills known in the prior art.

[0013] According to the present invention, the area in which the connection between the suction head and the power tool is established is preferably also referred to as the second connection area. On the power tool side, the suction connection device is particularly facing the handle of the power tool. In other words, according to the present invention, it is preferred that the suction connection device can be arranged between the tool of the power tool and the handle of the power tool. The handle preferably includes a handle piece, through which the handpiece of the handle can be fastened to the housing of the power tool. Preferably, the handle can also be referred to as a side handle of the power tool.

[0014] The connection between the suction connection device and the power tool or the handle of the power tool is established by the cooperation of the toothed portion and the mating toothed portion, wherein, according to the present invention, the unit consisting of the toothed portion and the mating toothed portion is preferably called a locking mechanism. The locking mechanism is preferably designed to connect the power tool or the handle of the power tool to the suction head. In particular, the gap between the power tool and the tool can be bridged by the locking mechanism. In particular, the locking mechanism is located in the second connection area between the suction connection device and the power tool. According to the present invention, it is particularly preferred that the toothed portion is integrated in the handle of the power tool. This realizes a locking mechanism that is particularly simple in structure.

[0015] The suction connection also has a first connection area, wherein, in this first connection area, the suction head can be connected to the tool of the power tool. The suction head also has a second connection area, wherein, in this second connection area, the suction connection can be connected to the power tool or the handle of the power tool. According to the invention, preferably, the first connection area and the second connection area are arranged substantially along a central axis, which is formed by, for example, a drive axis of the tool of the power tool. According to the invention, this drive axis can also be referred to as an axis or a drilling axis.

[0016] Preferably, the suction head also has a third connection area, wherein, in this third connection area, the suction connection device can be connected to a vacuum cleaning device. This third connection area can preferably be formed by an extraction nozzle or include an extraction nozzle. According to the present invention, it is very particularly preferred that the suction connection device includes a connection portion for a vacuum cleaning device. In theory, the central axis can pass through the third connection area or through the extraction nozzle, wherein this virtual central axis is substantially perpendicular to the central axis, and the first connection area and the second connection area are arranged along the central axis. For a person skilled in the art, the term "substantially" is not an unclear term, because a person skilled in the art understands that, for example, in the context of the present invention, even small deviations from exact mathematical orthogonality (for example in the range of 0 to 5 degrees) are intended to be covered by the term "substantially vertical".

[0017] According to the present invention, it is preferred that the suction connection device is connected to the vacuum cleaner by a suction hose. The first end of the suction hose can preferably be connected to the suction connection device or the third connection area of ​​the suction connection device and leads to the vacuum cleaner. Preferably, the second end of the suction hose can be connected to the vacuum cleaner. The present invention advantageously enables the suction hose to be fixed relative to the handle of the power tool. In addition, by the present invention, the angle of the suction hose relative to the handle of the power tool can be adjusted in a particularly simple and uncomplicated manner. In other words, a significant advantage achieved by the present invention is that the angle between the suction hose and the handle of the power tool can be set particularly easily. This is achieved in particular by arranging a locking mechanism between the suction connection device and the power tool, wherein, as a result, a releasable and / or angle-adjustable connection can be advantageously established between the power tool or its handle and the suction head. It is provided that the locking mechanism has a toothing or a profile, which can engage with a matching toothing or a matching profile of the power tool. According to the present invention, it is preferred that the toothing is designed to engage with a matching toothing of the suction connection device. As a result, a preferably adjustable connection, for example a variable connection, can be established between the handle of the power tool and the suction connection.

[0018] Since a locking mechanism is provided between the suction connection device and the power tool, it is particularly possible that the suction hose connecting the vacuum cleaner and the power tool together can be fixed relative to the side handle of the power tool. In addition, the present invention advantageously provides a possible method of setting the angle between the suction hose and the handle of the power tool in a particularly simple manner. In particular, since a locking mechanism is provided, at least three fastening stages can be provided, which define different fastening modes between the suction connection device and the power tool. According to the present invention, preferably, the three fastening stages can be set by the number of rotations of the side handle when screwing on. Preferably, in the first fastening stage, the handle of the power tool and the suction connection device are substantially fixed together. In the second fastening stage, the handle of the power tool and the suction connection device can form a unit configured to be rotatable relative to the power tool. According to the present invention, preferably, in the third fastening stage, the suction connection device is configured to be rotatable relative to the handle of the power tool. In other words, in the first fastening stage, the handle of the power tool and the suction connection device are fastened together. In the second tightening phase, the side handle of the power tool and the suction head can rotate together relative to the power tool. In the third tightening phase, the suction head can be twisted relative to the side handle of the power tool. This can preferably be achieved by additional actuation on the toothed portion of the handle member of the power tool. In particular, due to the additional actuation on the toothed portion, the toothed portion can be retracted. As a result, in particular a fixed position will be reached, which is in particular a latched position or an open position.

[0019] According to the invention, preferably, the tightening stages can be set by a plurality of rotations of the handle of the power tool. In other words, the tightening stages can be set relative to each other depending on the arrangement of the toothing and the mating toothing. By positioning the toothing and the mating toothing relative to each other, it is therefore preferably possible to define whether the handle of the power tool and the suction connection are essentially fixed together or whether the handle of the power tool and the suction connection form a unit that is configured to be rotatable relative to the power tool, or whether the suction connection is intended to be configured to be rotatable relative to the handle of the power tool.

[0020] According to the present invention, it is preferred that the toothed portion is integrated into the handle of the power tool. Due to this configuration of the present invention, a particularly compact and easy-to-operate power tool can be provided.

[0021] In another aspect, the invention relates to a method for connecting a vacuum cleaning device to a power tool, the method comprising the steps of:

[0022] a) provide a power tool with a tool,

[0023] b) providing a suction connection arranged between a tool of the power tool and the power tool,

[0024] c) establishing a connection between the suction connection device and the power tool by engaging the toothed portion of the power tool with the mating toothed portion of the suction connection device, the toothed portion of the power tool and the mating toothed portion of the suction connection device being mated in a manner that can set at least three tightening stages, wherein in a first tightening stage, the handle of the power tool and the suction connection device are substantially fixed together; in a second tightening stage, the handle of the power tool and the suction connection device form a unit configured to be rotatable relative to the power tool; in a third tightening stage, the suction connection device is configured to be rotatable relative to the handle of the power tool.

[0025] The terms, definitions and technical advantages introduced for the power tool system apply in an analogous manner to the proposed method. Advantageously, the proposed method enables the angle between the suction hose and the handle of the power tool to be adjusted in a particularly simple and uncomplicated manner. Preferably, the proposed method can be implemented by the proposed system. In particular, the power tool has a tool. In addition, the power tool has a toothing that can engage with a matching toothing of the suction connection. Preferably, the suction connection is arranged between the tool of the power tool and the power tool, so that the suction connection preferably represents a connecting piece between the tool and the power tool, by which a gap between the tool and the power tool can be bridged.

[0026] In the context of the present invention, a handle piece for a coring drill is disclosed, which can be used in particular for dry drilling. In this case, in a particularly preferred configuration of the invention, the coring drill can be used for sleeve cutting. When the tool of the power tool is diamond-studded, the drill can also preferably be referred to as a diamond coring drill. According to the invention, preferably, the handle piece of the power tool secures the tool handle using a locking mechanism and a matching contour preferably present in the suction head and allows the angle between the suction connection and the handle to be set.

[0027] Further advantages will become apparent from the following description of the accompanying drawings. Various exemplary embodiments of the present invention are shown in the accompanying drawings. The accompanying drawings and the description contain many combined features. Those skilled in the art will also readily consider these features individually and combine them to produce useful further combinations. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In the drawings, the same and similar components are denoted by the same reference numerals.

[0029] In the attached picture:

[0030] Figures 1 to 3A view showing a preferred configuration of a handle of a power tool;

[0031] Figures 4 to 6 A view showing a preferred configuration of a suction connection;

[0032] Figure 7 A view showing a preferred arrangement of a suction connection, a locking mechanism, and a handle of a power tool. DETAILED DESCRIPTION

[0033] Figures 1 to 3 A power tool 1 ( Figure 7 ) is a view of a preferred configuration of a handle 7, which can be a component of the proposed power tool system. In particular, Figures 1 to 3 A handle part is shown which can be a component of the power tool 1. A user of the power tool 1 can hold the handle 7 of the power tool 1 and in this way hold or guide the power tool. Preferably, a toothing 5 can be integrated in the handle 7 of the power tool 1, which toothing 5 can be connected to the suction connection 4 (see above). Figure 4 ) cooperates with the mating toothed portion 6 on the handle 7 of the power tool 1 so that an adjustable connection is formed between the power tool 1 and the suction connection device 4. The toothed portion 5 of the handle 7 of the power tool 1 includes a series of teeth, such as protruding elements or areas, which can engage with the recessed areas or depressions of the mating toothed portion 6 of the suction connection device 4, as a result of which a connection can be formed.

[0034] Figures 4 to 6 The preferred configuration of the suction connection 4 is shown. In particular, Figure 4 An oblique view of a preferred embodiment of the suction connection 4 is shown. Preferably, one part of the suction connection 4 can be used to connect the power tool 1 to its tool 3 and another part to connect the power tool 1 to a vacuum cleaner 2 (not shown). Therefore, the suction connection 4 preferably has three inputs or outputs, which according to the invention are also referred to as connection areas 8-10. According to the invention, preferably, the suction connection 4 has a first connection area 8, which is used to connect the suction connection 4 to the tool 3 of the power tool 1. Figure 4The first connection area 8 is shown in the upper right corner. According to the present invention, it is preferred that the first connection area 8 and the second connection area 9 are arranged along a central axis 11 in the suction connection device 4, wherein this central axis 11 may preferably coincide with the drive axis or drilling axis of the power tool 1. Preferably, the suction connection device 4 has a second connection area 9, which is used to connect the suction connection device 4 to the power tool 1, wherein the power tool 1 may also preferably be configured as a coring drill. In addition, the suction connection device 4 may have a third connection area 10, which is used to connect the suction connection device 4 to the vacuum cleaner 2, wherein the vacuum cleaner 2 is preferably designed to extract dust accumulated during the operation of the power tool 1 to prevent dust from entering the airway of the user.

[0035] The third connection area 10 may preferably be formed by or include an extraction nozzle 12. According to the present invention, preferably, in theory, a virtual central axis 13 may pass through the suction connection device 4, in particular through the third connection area 10 or the extraction nozzle 12 of the suction connection device 4, wherein this virtual central axis 13 is substantially perpendicular to the central axis 11 along which the first connection area 8 and the second connection area 9 are arranged. In other words, the central axis 11 and the virtual central axis 13 may be formed orthogonally to each other. The central axis 11 and the virtual central axis 13 are in Figures 4 to 6 The connection between the suction connection 4 and the vacuum cleaner 2 can be formed in particular using a suction hose (not shown), which can be connected to the suction connection 4 by means of a latch mechanism, for example. Preferably, the suction hose leads into a third connection region 10 of the suction connection 4.

[0036] Preferably, the suction connection 4 is designed to bridge or fill the gap between the tool 3 of the power tool 1 and the tool 1 itself. Preferably, the suction connection 4 forms a connection piece, which can be connected in a Figures 4 to 6 The illustrated manner is arranged between the tool 3 and the power tool 1. As a result, an adjustable connection between the tool 3 and the power tool 1 can advantageously be provided by the proposed power tool system.

[0037] The suction connection 4 comprises a mating toothing 6, which according to the invention can also preferably be referred to as a mating profile. Preferably, the mating toothing 6 of the suction connection 4 forms a locking mechanism with the toothing 5 of the power tool 1, which forms the connection between the power tool 1 and the suction connection 4. According to the invention, it is very particularly preferred that the connection between the power tool 1 and the suction connection 4 is formed between the suction connection 4 and a handle 7 of the power tool 1.

[0038] Figure 5 A preferred embodiment of the suction connection 4 is shown in a side view.

[0039] Figure 6 A further view of a preferred embodiment of the suction connection 4 is shown. Figure 6 The illustrated view shows in particular the second connection region 9 of the suction connection 4 , which is designed to produce a connection between the suction connection 4 and the power tool 1 or a handle 7 of the power tool 1 . Figure 6 The first connection region 8 of the suction connection 4, which is preferably designed to establish a connection between the suction connection 4 and the tool 3, is not shown. Figure 6 In the right half of the drawing, a third connection region 10 is shown, which is preferably configured as a suction nozzle 12. The third connection region 10 preferably forms a transition from the suction connection 4 to the vacuum cleaning device 2 (not shown), wherein the connection can be established in particular via a suction hose.

[0040] Figure 7 A preferred embodiment of the proposed power tool system is shown, but without the tool 3. In particular, Figure 7 A suction connection 4 is shown, which is connected to a power tool 1. The suction connection 4 has a mating toothing 6 which can engage with a toothing 5 of a handle 7 of the power tool 1, as a result of which a locking mechanism is advantageously formed. The locking mechanism is preferably located in the second connection region 9 of the proposed power tool system. Figure 7 In the drawing, a central axis 11 can be seen in the first connection region 8 of the suction connection 4, along which the first connection region 8 and the second connection region 9 can be arranged. A virtual central axis 13, which can be arranged in particular perpendicular to the central drive axis 11, preferably extends through the third connection region 10 or the extraction nozzle 12 of the suction connection 4. Starting from the third connection region 10, the suction connection 4 can be connected to a vacuum cleaner 2 (not shown). For this purpose, in particular a suction hose can be used.

[0041] List of Reference Numerals

[0042] 1. Power Tools

[0043] 2 Vacuum cleaning device

[0044] 3 Tools

[0045] 4Suction connection device

[0046] 5 teeth

[0047] 6Matching teeth

[0048] 7 handles

[0049] 8First connection area

[0050] 9 Second connection area

[0051] 10Third connection area

[0052] 11Center axis (drive axis)

[0053] 12 Extraction nozzle

[0054] 13Virtual central axis

Claims

1. A power tool system comprising the following components: - a power tool (1) comprising a tool (3), - a vacuum cleaner (2), which is used to extract dust generated when the power tool (1) is used for working, - Suction connection (4), It is characterized in that The suction connection device (4) is arranged between the tool (3) of the power tool (1) and the power tool (1), and because the toothed portion (5) of the power tool (1) can engage with the mating toothed portion (6) of the suction connection device (4), the suction connection device can be connected to the power tool (1). The toothed portion (5) of the power tool (1) cooperates with the matching toothed portion (6) of the suction connection device (4) in a manner that allows at least three tightening stages to be set, wherein: In a first tightening stage, the handle (7) of the power tool (1) and the suction connection device (4) are substantially fixed together; In the second tightening stage, the handle (7) of the power tool (1) and the suction connection device (4) form a unit configured to be rotatable relative to the power tool (1); In the third tightening stage, the suction connection device (4) is configured to be rotatable relative to the handle (7) of the power tool (1).

2. The power tool system according to claim 1, characterized in that: The tightening stages can be set by a number of rotations of the handle (7) of the power tool (1).

3. The power tool system according to claim 1 or 2, characterized in that: The suction connection device (4) has a first connection area (8) which is used to connect the suction connection device (4) to a tool (3) of the power tool (1).

4. The power tool system according to claim 1 or 2, characterized in that: The suction connection device (4) has a second connection area (9), which is used to connect the suction connection device (4) to the power tool (1).

5. The power tool system according to claim 3, characterized in that: The suction connection device (4) has a second connection area (9), which is used to connect the suction connection device (4) to the power tool (1).

6. The power tool system according to claim 5, characterized in that: The first connection area (8) and the second connection area (9) are arranged substantially along a central axis (11) of the power tool (1).

7. The power tool system according to claim 1 or 2, characterized in that: The suction connection device (4) has a third connection area (10), which is used to connect the suction connection device (4) to the vacuum cleaning device (2).

8. The power tool system according to claim 5, characterized in that: The suction connection device (4) has a third connection area (10), which is used to connect the suction connection device (4) to the vacuum cleaning device (2).

9. The power tool system according to claim 7, characterized in that: The third connection area (10) is formed by the extraction nozzle (12) or includes the extraction nozzle (12).

10. The power tool system according to claim 8, characterized in that: The virtual central axis (13) of the third connection region (10) is substantially perpendicular to the central axis (11) of the power tool (1), and the first connection region (8) and the second connection region (9) are arranged along the central axis.

11. The power tool system according to claim 1 or 2, characterized in that: The suction connection device (4) comprises a connection part for a vacuum cleaner (2).

12. The power tool system according to claim 1 or 2, characterized in that: The toothed portion (5) is integrated into the handle (7) of the power tool (1).

13. The power tool system according to claim 1 or 2, characterized in that: The toothing (5) is designed to engage with a mating toothing (6) of the suction connection (4).

14. A method for connecting a vacuum cleaner (2) to a power tool (1), the method comprising the following steps: a) providing a power tool (1) having a tool (3), b) providing a suction connection (4) arranged between a tool (3) of the power tool (1) and the power tool (1), c) establishing a connection between the suction connection device (4) and the power tool (1) by engaging the toothed portion (5) of the power tool (1) with the matching toothed portion (6) of the suction connection device (4); The toothed portion (5) of the power tool (1) cooperates with the matching toothed portion (6) of the suction connection device (4) in a manner that allows at least three tightening stages to be set, wherein: In a first tightening stage, the handle (7) of the power tool (1) and the suction connection device (4) are substantially fixed together; In the second tightening stage, the handle (7) of the power tool (1) and the suction connection device (4) form a unit configured to be rotatable relative to the power tool (1); In the third tightening stage, the suction connection device (4) is configured to be rotatable relative to the handle (7) of the power tool (1).

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