Protective hood device

Abstract

A protective hood device, in particular a handheld power tool protective hood device, comprising at least one protective hood base body (10) which is provided to at least partially cover an insert tool (12) of a handheld power tool (30) and which has at least one functional recess (14), comprising at least one cover unit (16) which is mounted on the protective hood base body (10) so as to be movable relative to the protective hood base body (10) and which is provided to cover the functional recess (14) of the protective hood base body (10) in at least one first position, comprising a cover base body (50) and comprising a locking unit (18) which is provided to lock the cover unit (16) in the at least one first position relative to the protective hood base body (10), characterized in that the locking unit (18) has a blocking element (20) which is mounted so as to be displaceable relative to the cover base body (50).

Description

State of the art

[0001] A protective hood device according to the preamble of claim 1 has already been proposed.

[0002] Furthermore, the subject matters of EP 2 186 600 A1, DE 20 2006 021 278 U1, US 6 699 114 B1 and WO 2007 / 059 604 A1 are known. Disclosure of the invention

[0003] The invention is based on a protective hood device, in particular a hand-held power tool protective hood device, with at least one protective hood base body which is provided to at least partially cover an insert tool of a hand-held power tool and which has at least one functional recess, and with at least one cover unit which is mounted on the protective hood base body so as to be movable relative to the protective hood base body and which is provided to cover the functional recess of the protective hood base body in at least a first position.

[0004] It is proposed that the protective hood device has a locking unit which is provided for locking the cover unit in the at least one first position relative to the protective hood base body. In this context, "covering" should be understood in particular to mean that the protective hood base body is arranged at least partially, preferably at least almost completely, in front of the insert tool in at least one spatial direction, in particular in the radial direction viewed from the outside to the inside and / or in the axial direction viewed from the hand-held power tool to the insert tool. In this context, a "functional recess" should be understood in particular to mean an immaterial area which, viewed from a surface of the protective hood base body, is preferably in the normal direction of the surface of the

[0005] protective hood base body extends at least partially through a material thickness of the protective hood base body and is at least partially intended to provide a function that supports and / or is necessary for operation of the hand-held power tool and / or at least one hand-held power tool function that is at least partially essential for an operating state. In this context, “at least partially” should be understood to mean in particular at least 50%, preferably at least 75%, more preferably at least 90% and particularly preferably at least 98% of the material thickness of the protective hood base body. The functional recess is preferably intended to enlarge a machining area of ​​the insert tool in order to enable, for example, machining of a transition area between at least two surfaces, such as in particular between a wall and a floor or a ceiling, and / or machining close to the edge.However, other functions that a specialist would consider useful are also conceivable.

[0006] In this context, “movably mounted” should be understood in particular to mean a mounting of the cover unit which enables movement of the cover unit relative to the protective hood base body along at least a distance greater than 10 mm, preferably greater than 20 mm and particularly preferably greater than 50 mm and / or around at least one axis, in particular around a rotational axis of the insert tool, by an angle greater than 10°, preferably greater than 25° and particularly preferably greater than 45°. “Provided” should be understood in particular to mean specially designed, configured and / or equipped. The fact that an object is provided for a specific function should be understood in particular to mean that the object fulfills and / or performs this specific function in at least one application and / or operating state.In this context, a "position" is to be understood in particular as an end position of the cover unit relative to the protective hood base body. In this context, "locking" is to be understood in particular as a preferably releasable coupling between the protective hood base body and the cover unit, wherein a locking force can be transmitted between the protective hood base body and the cover unit and wherein a relative movement between the protective hood base body and the cover unit can be in particular less than 5 mm, preferably less than 3 mm and particularly preferably less than 1 mm and / or less than 5°, preferably less than 3° and particularly preferably less than 1°.

[0007] The design according to the invention makes it possible to achieve an advantageously high level of user comfort and preferably a high level of operating safety.

[0008] It is further proposed that the locking unit is provided to lock the cover unit relative to the protective hood base body in at least one further position, in which the cover unit at least partially exposes the functional recess of the protective hood base body in at least one further position. In this context, a "position" should be understood in particular as an end position of the cover unit relative to the protective hood base body. In this context, "release" should be understood in particular as meaning that the insert tool of the hand-held power tool is designed to be freely accessible in at least one spatial direction, in particular in the radial direction viewed from the outside to the inside and / or in the axial direction viewed from the hand-held power tool towards the insert tool.In this context, "locking" is understood to mean, in particular, a preferably detachable coupling between the protective hood base body and the cover unit, wherein a locking force can be transmitted between the protective hood base body and the cover unit, and wherein a relative movement between the protective hood base body and the cover unit can be, in particular, less than 5 mm, preferably less than 3 mm, and particularly preferably less than 1 mm and / or less than 5°, preferably less than 3°, and particularly preferably less than 1°. This advantageously allows for high operator comfort and preferably good and flexible machining of a workpiece to be machined.

[0009] Furthermore, it is proposed that the cover unit be mounted so that it can be displaced relative to the protective hood base body. In this context, "displaceably mounted" is understood to mean, in particular, movable along a guide line. The cover unit can preferably be mounted so that it can be displaced radially and / or circumferentially. This allows for a structurally simple design of the protective hood device.

[0010] It is further proposed that the cover unit be pivotably mounted relative to the protective hood base body. In this context, "pivotably mounted" should be understood to mean, in particular, movable about an axis. In a particularly preferred embodiment, the cover unit is pivotably mounted about a rotational axis of the insert tool of the handheld power tool. This allows for a structurally simple design of the protective hood device.

[0011] It is also proposed that the locking unit comprise at least one blocking element that is movably connected to the cover unit. In this context, "movably connected" is to be understood in particular as a mounting of the blocking element that allows movement of the blocking element relative to the cover unit along at least a distance greater than 10 mm, preferably greater than 20 mm, and particularly preferably greater than 50 mm, and / or around at least one axis, in particular around a rotational axis of the insert tool, by an angle greater than 10°, preferably greater than 25°, and particularly preferably greater than 45°. This allows for an advantageously simple design and preferably high operating comfort.

[0012] It is further proposed that the locking unit comprise at least one spring element, against the spring force of which the at least one blocking element is movably mounted. A “spring element” is to be understood in particular as a macroscopic element which has at least one extent which, in a normal operating state, is elastically variable by at least 10%, in particular by at least 20%, preferably by at least 30% and particularly advantageously by at least 50%, and which in particular generates a counterforce which is dependent on a change in the extent and is preferably proportional to the change and counteracts the change. An “extension” of an element is to be understood in particular as a maximum distance between two points of a perpendicular projection of the element onto a plane.A “macroscopic element” is to be understood in particular as an element with an extension of at least 1 mm, in particular of at least 5 mm and preferably of at least 10 mm. In this context, “movably mounted” is to be understood in particular as a mounting of the locking element which has the possibility of movement of the locking element against a spring force of the spring element along at least a distance greater than 10 mm, preferably greater than 20 mm and particularly preferably greater than 50 mm and / or around at least one axis, in particular around a rotational axis of the insert tool, by an angle greater than 10°, preferably greater than 25° and particularly preferably greater than 45°. The spring element can preferably be formed by a tension spring, a leaf spring, a torsion spring, a disc spring and particularly preferably by a compression spring.This allows a preferably simple and advantageously secure locking of the cover unit to be achieved.

[0013] Furthermore, it is proposed that the protective hood base body have at least one first locking recess, which is intended to correspond with the at least one locking element of the locking unit and to define a first position of the cover unit. In this context, a "locking recess" is to be understood in particular as an immaterial region which, viewed from a surface of the protective hood base body, preferably in the normal direction of the surface of the protective hood base body, extends at least partially through a material thickness of the protective hood base body, and which is intended at least partially to lock the cover unit, in particular by corresponding with the at least one locking element.In this context, "at least partially" is understood to mean, in particular, at least 50%, preferably at least 75%, more preferably at least 90%, and particularly preferably at least 98% of the material thickness of the protective hood base body. This allows for an advantageously simple and reliable design of the locking unit and preferably a high level of operating comfort.

[0014] It is also proposed that the protective hood base body have at least one further locking recess, which is provided to define the further position of the cover unit. In this context, a "locking recess" is to be understood in particular as an immaterial region which, viewed from a surface of the protective hood base body, preferably in the normal direction of the surface of the protective hood base body, extends at least partially through a material thickness of the protective hood base body, and which is provided at least partially for locking the cover unit, in particular by corresponding with the at least one locking element. In this context, "at least partially" is to be understood in particular as at least 50%, preferably at least 75%, more preferably at least 90% and particularly preferably at least 98% of the material thickness of the protective hood base body.This allows for an advantageously simple and reliable design of the locking unit and preferably a high level of ease of use. In this context, "defining" should be understood in particular as specifying and / or specifying. This allows for an advantageously simple and advantageously secure locking of the cover unit.

[0015] Furthermore, it is proposed that the at least one locking element be mounted so as to be at least partially displaceable in the radial direction. In this context, "displaceably mounted" is understood to mean, in particular, a mounting of the locking element that allows linear movement of the locking element along at least a distance greater than 10 mm, preferably greater than 20 mm, and particularly preferably greater than 50 mm. This allows for an advantageously simple and reliable design of the locking unit, preferably a high level of operating convenience, and preferably simple and, in particular, tool-free locking of the cover unit.

[0016] Furthermore, it is proposed that the at least one locking element be provided, at least in part, for a positive locking of the cover unit. "Positive locking" is to be understood, in particular, as meaning that abutting surfaces of components connected in a positive locking manner, in particular of the at least one locking element and at least one of the at least two locking recesses, exert a holding force on each other acting in the normal direction of the surfaces. In particular, the components are in geometric engagement with each other. This allows an advantageously simple and reliable design of the locking unit and preferably a high level of operating comfort to be achieved.

[0017] In addition, a hand-held power tool with a protective hood device according to the invention is proposed.

[0018] The protective hood device according to the invention is not intended to be limited to the application and embodiment described above. In particular, the protective hood device according to the invention may have a number of individual elements, components, and units that differs from the number stated herein to fulfill a function described herein. drawing

[0019] Further advantages will become apparent from the following description of the drawings. The drawings illustrate an exemplary embodiment of the invention. The drawings, the description, and the claims contain numerous features in combination. Those skilled in the art will also expediently consider the features individually and combine them into useful further combinations.

[0020] They show: Fig. 1 a hand-held power tool with a protective hood device according to the invention in a perspective view, Fig. 2a a section of the protective hood device according to the invention in a first position in a perspective view, Fig. 2b shows the section of the protective hood device according to the invention in a further position in a perspective view, Fig. 3a a cover unit of the protective hood device according to the invention in a perspective view, Fig. 3b a section of the cover unit of the protective hood device according to the invention in a perspective view, Fig. 4 a locking element of a locking unit of the protective hood device according to the invention in a perspective rear view and Fig. 5 a section of the protective hood device according to the invention in a perspective view. Description of the embodiment

[0021] In Fig. 1 shows a hand-held power tool 30 designed as a concrete grinder. However, other embodiments of the hand-held power tool 30 that would appear appropriate to a person skilled in the art, such as an angle grinder, are also conceivable. The hand-held power tool 30 comprises a housing 32. The housing 32 is made of a plastic. The housing 32 forms a main handle 34, which is intended to be grasped by an operator's hand. Viewed in the main direction of extension 36 of the hand-held power tool 30, a power cable 38 is arranged at one end of the housing 32. The power cable 38 is intended to supply a drive unit (not shown) of the hand-held power tool 30 with electrical energy. The power cable 38 is intended to be connected to an electrical power network. For this purpose, the power cable 38 has a plug element (not shown).However, it is also conceivable for the handheld power tool 30 to be a cordless handheld power tool. The handheld power tool 30 further comprises a switching element 40 designed to be operable by an operator. The switching element 40 is provided for activating the drive unit. The switching element 40 is formed by a slide switch.

[0022] The handheld power tool 30 further comprises a gear housing 42. The gear housing 42 is connected to the housing 32 at an end of the housing opposite the power cable 38. The gear housing 42 is made of a metal. The gear housing 42 is made of aluminum. The handheld power tool 30 comprises a tool holder (not shown in detail), which is intended to receive an insert tool 12 and hold it captively. The insert tool 12 is formed by a grinding wheel. The insert tool 12 is detachably connected to the tool holder. The tool holder is arranged at an open end of the gear housing 42, viewed perpendicular to the main direction of extension 36 of the handheld power tool 30. The tool holder protrudes from the gear housing 42.

[0023] The handheld power tool 30 also has an auxiliary handle 44. The auxiliary handle 44 is designed to be grasped by another operator's hand. The auxiliary handle 44 is detachably coupled to the handheld power tool 30. The auxiliary handle 44 is arcuate. A gripping region 46 of the auxiliary handle 44 extends perpendicular to the main handle 34. The auxiliary handle 44 is arranged on a side of the gear housing 42 facing away from the tool holder. However, it is also conceivable for the gripping region 46 of the auxiliary handle 44 to be arranged as an extension of a grinding spindle of the handheld power tool, which, in an operating state, is provided for transmitting a drive movement of the drive unit to the insert tool 12.

[0024] A protective hood device is also attached to the handheld power tool 30. The protective hood device is designed as a handheld power tool protective hood device. The protective hood device is arranged at an end of the handheld power tool 30 facing the tool holder. The protective hood device is firmly connected to the handheld power tool 30. However, it is also conceivable for the protective hood device to be detachably coupled to the handheld power tool 30. The protective hood device is provided to protect an operator from the rotating insert tool 12 when the handheld power tool 30 is in an operating state and to prevent contact between the operator and the insert tool 12. The protective hood device has a connecting element 48 that can be coupled to a suction hose of a suction device, for example a vacuum cleaner. The connecting element 48 forms a suction channel.The protective hood device comprises a protective hood base body 10, which is intended to cover the insert tool 12 of the handheld power tool 30. The protective hood base body 10 is circular. The protective hood base body 10 has a functional recess 14. The functional recess 14 is intended to expose the insert tool 12 in a partial area, so that processing, for example, on a wall, is possible. The functional recess 14 is arcuate. The functional recess 14 is arranged in a radially outer area of ​​the protective hood base body 10. The suction device can further be intended to collect dust accumulating in a processing state of the handheld power tool by means of dust brushes (not shown) coupled to the protective hood base body 10 and preferably to guide it to the connection element 48.

[0025] The protective hood device further comprises a cover unit 16, which is movably mounted relative to the protective hood base body 10. The cover unit 16 is movably mounted on the protective hood base body 10. The cover unit 16 is displaceably mounted relative to the protective hood base body 10. The cover unit 16 is pivotally mounted relative to the protective hood base body 10. The cover unit 16 is provided to cover the functional recess 14 of the protective hood base body 10 in a first position ( Fig. 2a). The cover unit 16 is also intended to release the functional recess 14 of the protective hood base body 10 in a further position ( Fig. 2b). The cover unit 16 comprises a cover base body 50 ( Fig. 3a). The cover base body 50 is pivotally mounted relative to the protective hood base body 10. The cover base body 50 is intended to cover the functional recess 14 of the protective hood base body 10 in the first position. The cover base body 50 is also intended to expose the functional recess 14 of the protective hood base body 10 in the further position. When the protective hood device is mounted on the handheld power tool 30, the cover base body 50 is pivotally mounted about a rotation axis of the insert tool 12. The cover base body 50 has an arcuate cover region 52 and an annular guide region 54. The cover base body 50 has a smaller extension in the radial direction 28 than the protective hood base body 10. In the further position, the cover base body 50 is arranged radially inside the protective hood base body 10.

[0026] The protective hood device also comprises a locking unit 18. The locking unit 18 is intended to lock the cover unit 16 in the first position relative to the protective hood base body 10. The locking unit 18 is also intended to lock the cover unit 16 in the further position, in which the cover unit 16 exposes the functional recess 14 of the protective hood base body 10, relative to the protective hood base body 10. The locking unit 18 has a locking element 20 ( Fig. 4). The locking element 20 is movably connected to the cover unit 16. The locking element 20 is movably connected to the cover base body 50 of the cover unit 16. The locking element 20 is displaceably mounted relative to the cover base body 50. The locking element 20 is captively coupled to the cover base body 50 of the cover unit 16. The locking element 20 is positively coupled to a holding extension 56 of the cover base body 50. The holding extension 56 forms a locking unit guide element. The holding extension 56 is formed integrally with the cover base body 50. The holding extension 56 has a T-shaped front view. The locking element 20 engages around the holding extension 56 ( Fig. 5). In the assembled state of the protective hood device, the locking element 20 is held captively parallel to the rotational axis of the insert tool 12. The locking element 20 is designed to be displaceable in the radial direction 28 relative to the holding extension 56. The locking element 20 is mounted to be displaceable in the radial direction 28 of the protective hood device. The holding extension 56 guides the locking element 20 in the radial direction 28. The locking element 20 is formed by a slide.

[0027] The locking unit 18 comprises a spring element 22, against whose spring force the locking element 20 is movably mounted. The holding extension 56 of the cover base body 50 has, viewed parallel to the rotation axis of the insert tool 12, a U-shaped recess 58 in which the spring element 22 is arranged ( Fig.3b). The spring element 22 is formed by a compression spring. The spring element 22 is formed by a spiral spring. The spring element 22 is supported on the retaining extension 56 of the cover base body 50 in the radial direction 28. In an assembled state, the spring force of the spring element 22 presses the locking element 20 inward in the radial direction 28 toward the rotation axis of the insert tool 12. The locking element 20 is displaceable outward in the radial direction 28 relative to the retaining extension 56 of the cover base body 50, counter to the spring force of the spring element 22. An operator of the handheld power tool 30 can displace the locking element 20 outward in the radial direction 28, counter to the spring force of the spring element 22. As soon as the operator of the hand-held power tool 30 releases the locking element 20, the locking element 20 moves automatically inwards in the radial direction 28 due to the spring force of the spring element 22.The locking unit 18 is provided to prevent the cover unit 16 from pivoting automatically from the first position to the further position or vice versa.

[0028] The protective hood base body 10 has a first locking recess 24, which is intended to correspond with the locking element 20 of the locking unit 18 and to define the first position of the cover unit 16. The protective hood base body 10 has a further locking recess 26, which is intended to correspond with the locking element 20 of the locking unit 18 and to define the further position of the cover unit 16. The first locking recess 24 is intended to correspond with the locking element 20 in the first position of the cover unit 16, in which the cover base body 50 covers the functional recess 14. The further locking recess 26 is provided to correspond with the locking element 20 in the further position of the cover unit 16, in which the cover base body 50 releases the functional recess 14.The first locking recess 24 and the further locking recess 26 are arranged in the region of the functional recess 14 of the protective hood base body 10. The first locking recess 24 and the further locking recess 26 extend inward in the radial direction 28. The first locking recess 24 is arranged at a first end of the functional recess 14 of the protective hood base body 10, as viewed in the circumferential direction 60. The further locking recess 26 is arranged at a second end of the functional recess 14 of the protective hood base body 10, facing away from the first end, as viewed in the circumferential direction 60. The first locking recess 24 and the further locking recess 26 are arranged at a distance from one another, as viewed in the circumferential direction 60. The first locking recess 24 and the further locking recess 26 and the locking element 20 are provided for a positive locking of the cover unit 16.In the first position of the cover base body 50, the locking element 20 engages in the first locking recess 24 of the protective hood base body 10 and locks the cover unit 16 relative to the protective hood base body 10 such that the cover base body 50 covers the functional recess 14. In the further position of the cover base body 50, the locking element 20 engages in the further locking recess 26 of the protective hood base body 10 and locks the cover unit 16 relative to the protective hood base body 10 such that the cover base body 50 releases the functional recess 14.

Claims

[1] A protective hood device, in particular a handheld power tool protective hood device, comprising at least one protective hood base body (10) which is provided to at least partially cover an insert tool (12) of a handheld power tool (30) and which has at least one functional recess (14), comprising at least one cover unit (16) which is mounted on the protective hood base body (10) so as to be movable relative to the protective hood base body (10) and which is provided to cover the functional recess (14) of the protective hood base body (10) in at least one first position, comprising a cover base body (50) and a locking unit (18) which is provided to lock the cover unit (16) in the at least one first position relative to the protective hood base body (10), characterized by that the locking unit (18) has a blocking element (20) which is displaceably mounted relative to the cover base body (50). [2] Protective hood device according to claim 1, characterized by that the locking unit (18) is provided to lock the cover unit (16) relative to the protective hood base body (10) in at least one further position in which the cover unit (16) at least partially releases the functional recess (14) of the protective hood base body (10) in at least one further position. [3] Protective hood device according to one of the preceding claims, characterized by that the cover unit (16) is mounted displaceably relative to the protective hood base body (10). [4] Protective hood device according to one of the preceding claims, characterized by that the cover unit (16) is pivotally mounted relative to the protective hood base body (10). [5] Protective hood device according to one of the preceding claims, characterized by that the locking unit (18) comprises at least one blocking element (20) which is movably connected to the cover unit (16). [6] Protective hood device according to claim 5, characterized by that the locking unit (18) has at least one spring element (22), against the spring force of which the at least one blocking element (20) is movably mounted. [7] Protective hood device at least according to claim 5, characterized by that the protective hood base body (10) has at least one first locking recess (24) which is intended to correspond with the at least one blocking element (20) of the locking unit (18) and to define the first position of the cover unit (16). [8] Protective hood device at least according to claim 2, characterized by that the protective hood base body (10) has at least one further locking recess (26) which is provided to define the further position of the cover unit (16). [9] Protective hood device at least according to claim 5, characterized bythat the at least one locking element (20) is mounted so as to be at least partially displaceable in the radial direction (28). [10] Protective hood device at least according to claim 5, characterized by that the at least one locking element (20) is at least partially provided for a positive locking of the cover unit (16). [11] Hand tool with a protective hood device according to one of the preceding claims.

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