Pressing force display device having tool receiving portion

Abstract

A pressing force display device (150) for displaying a pressing force (299) acting on an insertion tool has: a tool receptacle (157) for receiving the insertion tool at least in some regions; a pressing force measuring unit (158) for measuring a pressing force acting on the tool receiving portion (157); and a pressing force display unit (159) for displaying the measured pressing force, the pressing force measuring unit (158) having a first sleeve (151) and a second sleeve (152) which is arranged coaxially and displaceably in an axial direction (203) on the first sleeve, the first sleeve being connected to the second sleeve via a limiting element which is displaceable axially on the first sleeve, and the limiting element being connected to the second sleeve via a limiting element which is displaceable axially on the first sleeve. The first sleeve and the second sleeve form a common receptacle for receiving a spring element (156), which acts on the second sleeve in the direction of the maximum position (298), in order to determine the maximum position (298) of the second sleeve when the second sleeve is axially displaced in a pointing manner away from the first sleeve, and wherein the first sleeve and the second sleeve form a common receptacle for receiving the spring element (156), which acts on the second sleeve in the direction of the maximum position (298), the maximum position (298) corresponds to a minimum pressing force.

Description

Technical Field

[0001] The invention relates to a pressing force display device for displaying the pressing force acting on an inserted tool. Background Art

[0002] Display devices in the form of drilling depth indicators are known from the prior art, which display the respective current drilling depth of the drilling tool to a user of the handheld power tool during the drilling process. Summary of the invention

[0003] The present invention relates to a pressing force display device for displaying a pressing force acting on an inserted tool, the pressing force display device having: a tool receiving portion for at least partially receiving the inserted tool; a pressing force measuring unit for measuring the pressing force acting on the tool receiving portion; and a pressing force display unit for displaying the measured pressing force. The pressing force measuring unit has a first sleeve and a second sleeve, the second sleeve being coaxially and movably arranged on the first sleeve in the axial direction, wherein the first sleeve is connected to the second sleeve via a limiting element movably arranged on the first sleeve in the axial direction so as to determine the maximum position of the second sleeve when the second sleeve is axially moved away from the first sleeve; wherein the first sleeve and the second sleeve form a common receiving portion for receiving a spring element that loads the second sleeve in the direction of a maximum position, wherein the maximum position corresponds to a minimum pressing force.

[0004] Therefore, the present invention realizes providing a pressing force display device which can safely and reliably measure the pressing force acting on an inserted tool and display it to a user in real time, thereby protecting the inserted tool and thereby achieving an increased service life.

[0005] The first sleeve preferably has an interface for being arranged on a machine tool receptacle of a hand-held power tool.

[0006] The pressing force display device can thus be arranged easily and uncomplicatedly on the handheld power tool.

[0007] Preferably, the second sleeve configures the tool receiving portion.

[0008] A suitable tool receptacle is thus formed in a simple manner.

[0009] According to one embodiment, the tool receptacle is designed as a polygonal inner receptacle, in particular a HEX receptacle, for at least partially receiving an inserted tool.

[0010] Therefore, the insertion tool with the HEX receptacle can be stably and reliably received in the tool receptacle.

[0011] Preferably, the first sleeve has a first annular receptacle and the second sleeve has a second annular receptacle, wherein the first and second annular receptacles are jointly designed as receptacles for receiving the spring element.

[0012] A secure and firm reception of the spring element is thereby achieved.

[0013] The limiting element preferably has a screw with a screw head.

[0014] A suitable limiting element can thus be provided in a simple manner.

[0015] According to one embodiment, the first sleeve has a bottom surface facing the second sleeve, the bottom surface having a groove for the screw, and the second sleeve having a thread for constructing a threaded connection with the screw, wherein the screw head rests on the bottom surface in the maximum position of the second sleeve and is spaced apart from the bottom surface according to the corresponding pressing force extending in the longitudinal direction of the screw.

[0016] As a result, a safe and reliable displacement of the two sleeves in the longitudinal extension can be achieved.

[0017] Preferably, the second sleeve has an inner receiving portion configured as a polygon, and the first sleeve has an outer circumference corresponding to the inner receiving portion.

[0018] A safe and reliable transmission of the torque from the handheld power tool to the pressing force display device connected thereto is thus possible.

[0019] The second sleeve preferably has an inner receptacle for receiving the first sleeve, wherein the first sleeve can be inserted into the second sleeve depending on the respectively existing pressing force, wherein the pressing force display unit is arranged on the outer circumference of the first sleeve.

[0020] A suitable arrangement of the two sleeves relative to one another can thus be achieved in a simple manner.

[0021] The pressing force display device is preferably configured as a scale arranged on the outer circumference and / or has at least two color marking display areas.

[0022] The respectively measured pressing force can thus be visualized safely and reliably to the user. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be explained in more detail in the following description with reference to the embodiments shown in the accompanying drawings. It is shown that:

[0024] Figure 1 The pressing force display device according to the present invention is arranged between the handheld power tool and the insertion tool.

[0025] Figure 2 Figure 1A longitudinal sectional view of a pressing force display device,

[0026] Figure 3 Figure 1 and Figure 2 A three-dimensional cross-sectional view of a pressing force display device, and

[0027] Figure 4 Figures 1 to 3 A three-dimensional view of a pressing force display device. DETAILED DESCRIPTION

[0028] In the drawings, elements having the same or similar functions are marked with the same reference numerals and are described in detail only once.

[0029] Figure 1 An exemplary handheld power tool 100 is shown, which has a housing 110 with a handle 105. A machine tool receptacle 130 for receiving an inserted tool 140 (eg, a drill bit) is associated with the handheld power tool 100. In the illustration, the inserted tool 140 is designed as a diamond drill bit.

[0030] An electric drive motor 120 for driving the machine tool receiving portion 130 is preferably arranged in the housing 110. The drive motor 120 is preferably switched on and off by a manual switch 117. The manual switch 117 is preferably arranged on the handle 105.

[0031] As shown in the figure, an optional additional handle 118 is associated with the handheld power tool 100. The additional handle 118 is arranged, by way of example, in the region of a machine tool receptacle 130.

[0032] The handheld power tool 100 preferably has a cable 119 for power supply from the mains. Alternatively, the handheld power tool 100 has a battery pack for power supply independent of the mains. As shown, the handheld power tool 100 is configured as a drill, but can also be configured as a screwdriver, for example.

[0033] For displaying the pressing force acting on the inserted tool 140 ( Figure 2 The pressing force display device 150 (299 in the figure) is schematically arranged on the machine tool receiving portion 130. In order to at least partially receive the inserted tool 140, the pressing force display device 150 has a tool receiving portion 157. Preferably, the receiving handle 142 of the inserted tool 140 is arranged in the tool receiving portion 157.

[0034] For example, the insert tool 140 may be a drilling tool. As shown, the insert tool 140 is configured as a diamond drill bit.

[0035] The tool receptacle 157 and the machine tool receptacle 130 are preferably coupled to one another so that during operation of the handheld power tool 100, a torque is transmitted from the tool receptacle 130 to the tool receptacle 157 and thus from the tool receptacle to the inserted tool 140. The coupling between the tool receptacle 157 and the machine tool receptacle 130 can be detachable. In this case, the pressing force display device 150 is designed in the manner of an additional component or adapter that can be retrofitted, in particular.

[0036] Preferably, the pressing force display device 150 has: a pressing force measuring unit 158 ​​for measuring the pressing force ( Figure 2 and a pressing force display unit 159 for displaying the measured pressing force ( Figure 2 299 in the figure). The pressure measuring unit 158 ​​preferably has a first sleeve 151 and a second sleeve 152. Here, the first sleeve 151 is connected to the second sleeve 152 via a limiting element 160 that can be axially moved on the first sleeve 151, so that the maximum position ( Figure 2 298 in the .

[0037] Preferably, the first sleeve 151 has an interface 153 for being arranged on the machine tool receiving portion 130 of the handheld machine tool 100. In addition, the second sleeve 152 preferably forms a tool receiving portion 157. The second sleeve 152 is preferably coaxial and can be moved in the axial direction ( Figure 2 203) is movably arranged on the first sleeve 151. The first sleeve 151 and the second sleeve 152 preferably form a common receiving portion ( Figure 2 219 in the figure) for receiving the spring element 156. In addition, the second sleeve 152 preferably has an inner receiving portion 154 which is configured in a polygonal shape.

[0038] Figure 2 Shows Figure 1 The present invention also illustrates the structure and arrangement of the first and second sleeves 151 and 152. The first sleeve 151 is arranged together with the interface 153 on the first axial end 201 on the left side of the pressing force display device 150, and is used to be arranged on the Figure 1 The machine tool receiving portion 130 of the handheld machine tool 100 is used to receive Figure 1 The tool receiving portion 157 of the inserted tool 140 is arranged on the second axial end 202 of the pressing force display device 150 on the opposite right side of the figure. In addition, the pressing force display device 150 has a longitudinal axis 204 as shown. The axial direction 203 of the pressing force display device 150 extends along the longitudinal axis 204 as shown.

[0039] Preferably, the second sleeve 152 is arranged coaxially and displaceably in the axial direction 203 on the first sleeve 151. Here, the first sleeve 151 and the second sleeve 152 are configured to have a common receptacle 219 for receiving the spring element 156. The first sleeve 151 preferably has a first annular receptacle 211, and the second sleeve 152 has a second annular receptacle 239. Here, the first and second annular receptacles 211, 239 jointly configure a receptacle 219 for receiving the spring element 156. Preferably, the spring element 156 is arranged in the axial direction 203 between a bottom surface 212 of the first sleeve 151 assigned to the receptacle 211 and a bottom surface 238 of the second sleeve 152 assigned to the receptacle 239.

[0040] The second sleeve 152 exemplarily has an annular plate 230 for configuring a second annular receiving portion 239. The receiving portion 239 is illustratively configured between the annular plate 230 and the outer periphery of the second sleeve 152. In addition, exemplarily, the inner receiving portion 154 is arranged in the annular plate 230 perpendicular to the longitudinal axis 204. Preferably, the inner receiving portion 154 is configured in a polygonal shape. In addition, the first sleeve 151 has an outer periphery 213 corresponding to the inner receiving portion 154.

[0041] The spring element 156 is preferably arranged on the outer circumference 232 of the annular plate 230. The spring element 156 is preferably designed to load the second sleeve 152 in the direction of the maximum position 298. Preferably, the maximum position 298 corresponds to the minimum pressing force. An exemplary minimum pressing force applied to the second end 202 of the pressing force display device 150 is graphically indicated by an arrow 299.

[0042] Preferably, the second sleeve 152 has an inner receiving portion 239 for receiving the first sleeve 151, wherein the first sleeve can be sunk into the second sleeve 152 according to the corresponding pressing force. Here, the outer circumference 214 of the first sleeve 151 can be arranged in the inner receiving portion 239. It should be noted that, alternatively to this, the first sleeve 151 can also receive the second sleeve 152. In this case, the first sleeve 151 is equipped with an inner receiving portion, in which the second sleeve 152 can be arranged.

[0043] According to one embodiment, the limiting element 160 has a screw 260 with a screw head 262 . A longitudinal extension 265 of the screw 260 is preferably oriented in the axial direction 203 .

[0044] The first sleeve 151 has a bottom surface 215 facing the second sleeve 152, which has a recess 216 for a screw 260. In addition, the second sleeve 152 has a thread 234 for forming a screw connection with the screw 260. In this case, the screw head 262 rests on the bottom surface 215 in the maximum position of the second sleeve 152, and the screw head 262 is spaced apart from the bottom surface 215 according to the corresponding pressing force 299 along the longitudinal extension 265 of the screw 260. It should be noted that a plurality of screws 260 can also be used. It should also be noted that, alternatively or selectively, the screw 260 can be arranged in the receiving portion 219. In addition, alternatively or selectively, the spring element 156 can be arranged centrally, that is, in the inner receiving portion 154.

[0045] Preferably, the tool receiving portion 157 is configured as a polygonal inner receiving portion 297, in particular a HEX receiving portion, for at least partially receiving a tool. Figure 1 The insertion tool 140. In addition, the pressing force display unit 159 is arranged on the outer circumference 214 of the first sleeve 151. In addition, Figure 2 An axial position 291 along the longitudinal axis 204 is shown, as well as an arrow 292 which shows the viewing direction.

[0046] Figure 3 Shows Figure 1 and Figure 2 A pressing force display device 150 having a first sleeve 151 and a second sleeve 152, wherein the pressing force display device 150 is Figure 2 The axial position 291 of the figure is cut, and along Figure 2 Observe in the direction of arrow 292. Figure 3 The first and second sleeves 151, 152 are arranged coaxially or relative to each other. Figure 2 The spring element 156 is arranged in the receiving portion 219 or in the radial direction between the first and second sleeves 151 , 152 . Figure 3 The second sleeve 152 is shown with its inner receiving portion 154 , which is designed as a polygon, and the corresponding outer circumference 213 of the first sleeve 151 .

[0047] Figure 4 Shows Figures 1 to 3 A pressing force display device 150 having first and second sleeves 151 and 152. Figure 4 The pressing force display unit 159 is shown.

[0048] According to one embodiment, the pressing force display unit 159 is configured as a scale 415 arranged on the outer circumference 214 of the first sleeve 151. Alternatively or selectively, the pressing force display unit 159 has at least two color-coded display areas 411, 412. Here, the display area 411 can visualize the optimal pressing force, while the display area 412 visualizes an excessive pressing force, at which pressure, Figure 1 The inserted tool 140 may be subjected to excessive stress.

[0049] For example, the display area 411 may be marked in green, and the display area 412 may be marked in red. It should be noted that the display areas 411 and 412 may also have any other colors.

Claims

1. A pressing force display device (150) for displaying a pressing force (299) acting on an inserted tool (140), the pressing force display device comprising: a tool receiving portion (157) for at least partially receiving the inserted tool (140); a pressing force measuring unit (158) for measuring the pressing force (299) acting on the tool receiving portion (157); and a pressing force display unit (159) for displaying the measured pressing force (299), wherein: The pressing force measuring unit (158) comprises a first sleeve (151) and a second sleeve (152), wherein the second sleeve is coaxially arranged on the first sleeve (151) and movable in an axial direction (203), wherein the first sleeve (151) is connected to the second sleeve (152) via a limiting element (160) that is axially movable on the first sleeve (151) so as to determine a maximum position (298) of the second sleeve (152) when the second sleeve (152) is axially moved away from the first sleeve (151), wherein the first sleeve (151) and the second sleeve (152) are constructed with a common receiving portion (219) for receiving a spring element (156) that loads the second sleeve (152) in the direction of the maximum position (298), wherein the maximum position (298) corresponds to a minimum pressing force (299).

2. The pressing force display device according to claim 1, characterized in that: The first sleeve (151) has an interface (153) for being arranged on a machine tool receptacle (130) of a hand-held power tool (100).

3. The pressing force display device according to claim 1 or 2, characterized in that: The second sleeve (152) forms the tool receiving portion (157).

4. The pressing force display device according to claim 3, characterized in that: The tool receptacle (157) is designed as a polygonal inner receptacle (297), in particular a HEX receptacle, for at least partially receiving an inserted tool (140).

5. The pressing force display device according to any one of the preceding claims, characterized in that: The first sleeve (151) has a first annular receiving portion (211), and the second sleeve (152) has a second annular receiving portion (239), and the first and second annular receiving portions (211, 239) are jointly configured to receive a receiving portion (219) of the spring element (156).

6. The pressing force display device according to any one of the preceding claims, characterized in that: The limiting element (160) has a screw (260) with a screw head (262).

7. The pressing force display device according to claim 6, characterized in that: The first sleeve (151) has a bottom surface (215) facing the second sleeve (152), the bottom surface having a groove (216) for the screw (260), and the second sleeve (152) has a thread (234) for constructing a threaded connection with the screw (260), wherein the screw head (262) abuts against the bottom surface (215) in the maximum position of the second sleeve (152) and is spaced apart from the bottom surface (215) according to a corresponding pressing force (299) along the longitudinal extension (265) of the screw (260).

8. The pressing force display device according to any one of the preceding claims, characterized in that: The second sleeve (152) has an inner receiving portion (154) configured as a polygon, and the first sleeve (151) has an outer peripheral edge (213) corresponding to the inner receiving portion (154).

9. The pressing force display device according to any one of the preceding claims, characterized in that: The second sleeve (152) has an inner receiving portion (239) for receiving the first sleeve (151), wherein the first sleeve can be sunk into the second sleeve (152) according to a corresponding existing pressing force, wherein the pressing force display unit (159) is arranged on the outer circumference (214) of the first sleeve (151).

10. The pressing force display device according to claim 9, characterized in that: The pressing force display unit (159) is configured as a scale (415) arranged on the outer circumference (214), and / or has at least two color mark display areas (411, 412).

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