Electric hand shears, on-board tool, system and method for adjusting the blade play

Abstract

An electric hand shear (1) comprising a drive motor (11) for driving at least one blade (3a) of a blade assembly (3), an adjusting device (13) for adjusting a blade clearance of the blade assembly (3), wherein the adjusting device (13) has at least one screw connection (14, 17) with an actuating contour (26, 27), a housing (2) with a battery compartment (4) for reversibly receiving a battery pack (5) for supplying the drive motor (11) with energy, is specified, wherein the housing (2) has a receiving compartment (50, 50') for storing a plate-shaped on-board tool (30) for actuating the actuating contour (26, 27). Furthermore, an on-board tool (30) for an electric hand shear (1) is specified, wherein the on-board tool (30) is a plate with a circumferential edge (33), wherein edges (31, 32) are formed on the circumferential edge (33) which are designed to engage in the actuating contour (26, 27) of the adjusting device (13).Furthermore, a system consisting of electric hand shears (1), battery pack (5) and on-board tools (30) as well as a method for adjusting the blade play are specified.

Description

[0001] The invention relates to an electric hand shear, an on-board tool for adjusting the blade play of the hand shear, a system comprising hand shears, battery pack and on-board tool, and a method for adjusting the blade play.

[0002] Electric hand shears with adjustable blade play are known from the state of the art.

[0003] US 2021 / 0299894 A1 discloses battery-operated electric hand shears with an adjustable blade clearance and a locking washer.

[0004] US 2023 / 0191639 A1 discloses a protective cover for the blades of an electric hand shear.

[0005] JP S5656388 A discloses a cordless screwdriver which has a storage compartment for bits and a drill chuck key in its housing.

[0006] DE 203 05 133 U1 discloses a hand tool with a bit supply which is arranged in an additional bracket and can be covered by a sliding cover slide.

[0007] DE 101 59 050 A1 discloses a cordless hand saw in which an auxiliary tool designed as a hexagonal key can be inserted into a slot in the housing and protrudes at an angle from the contour of the housing, defining a through-hole. The hexagonal key can only be removed from the slot when the battery pack is removed from the housing.

[0008] Typically, the blades are mounted on a bolt, and an adjusting nut is screwed onto the bolt, which tightens the blades against each other. By loosening or tightening the adjusting nut, the blade play can be increased or decreased. To prevent the adjusting nut from self-adjusting, a locking screw is provided, which must be loosened before adjustment. Different tools are required to loosen or tighten the adjusting nut and the locking screw, which are usually included as individual parts.

[0009] It has been shown that many users forget to take the various tools with them when using the hand shears or misplace them after use, requiring them to be searched for later. Some users also deliberately do not take the various tools with them to the job site because they do not want to constantly carry the additional weight of the tools. However, the blade play can change over the life of the hand shears, meaning the user may need to readjust the blade play at the site. Regular maintenance of electric hand shears also requires adjusting, or specifically increasing, the blade play to provide a lubrication gap for the lubricating oil to penetrate the contact surfaces of the blades.

[0010] The object is therefore to provide electric hand shears that is improved with regard to the aforementioned disadvantages. This object is solved by the electric hand shears specified in claim 1. Furthermore, the object is to provide a tool for adjusting the blade play that is improved with regard to the aforementioned disadvantages. This object is solved by the on-board tool specified in claim 7. Furthermore, the object is to provide a system comprising electric hand shears and a tool for adjusting the blade play that is improved with regard to the aforementioned disadvantages. The object is solved by the system specified in claim 9. Furthermore, the object is to provide a method for adjusting the blade play of the electric hand shears that is improved with regard to the aforementioned disadvantages. The object is solved by the method specified in claim 10.

[0011] Electric hand shears are hand-held shears, in particular garden shears, branch shears or pruning shears, driven by an electric drive motor and possibly a gear. The term blades refers to the two arms of the shears that move relative to each other during the cutting movement of the shears. At least one of the blades has a ground cutting edge. The other blade can also be ground or designed as a blunt counter-holder. The blade play is a measure of the distance between the blades. The adjustment device is used to adjust, i.e. increase or decrease the blade play. If the blade play is zero millimeters, the adjustment device adjusts in particular the pretension of the blades relative to each other.The adjustment device comprises, in particular, a first screw connection with a first actuating contour and a second screw connection with a second actuating contour. The first actuating contour and the second actuating contour can be designed identically or differently. The first screw connection fixes the second screw connection. The second screw connection adjusts the clearance between the blades and supports the blades. The first screw connection is, in particular, self-locking, and the second screw connection is, in particular, non-self-locking.

[0012] A battery pack is understood to be a battery pack consisting in particular of several electrochemical battery cells, which forms a secondary battery and can be recharged, for example, when connected to a charger. The battery pack in particular has a lithium or lithium-ion cell chemistry. In an alternative embodiment, the battery pack can also be equipped with primary cells that are replaced with new primary cells after they are discharged. The nominal voltage of the battery pack is in particular a maximum of 18V, in particular a maximum of 12V. The capacity is in particular less than 5 Ah. The energy content is in particular less than 150Wh, in particular less than 100Wh. The weight of the battery pack is in particular less than 300g, in particular less than 250g.The low mass of the battery pack means the hand shears can be held safely and comfortably over extended periods of time. However, due to the lower energy content, the battery pack needs to be charged or replaced more frequently. For this purpose, the battery pack is held in a removable battery compartment in the hand shears. The battery pack can be connected or disconnected from the battery compartment without the need for tools. In particular, the battery pack can be pushed into the battery compartment. Various battery compartment designs are known in the art; for example, the battery compartment can be pot-shaped or rail-shaped. The battery compartment can be designed so that the battery pack is completely contained within it, or with a section protruding from the battery compartment.

[0013] In one embodiment, the battery pack has an elongated shape. The length of the battery pack measured in the longitudinal direction of the battery pack is in particular at least 1.5 times, in particular at least 2 times the width of the battery pack. The battery pack is delimited radially to the longitudinal center axis by a lateral surface and in the longitudinal direction by a base or a cover. The battery pack in particular has a shape deviating from a cuboid shape. A cross-section related to the longitudinal center axis of the battery pack in particular has a circular arc-triangular shape. This embodiment of the battery pack is used in particular in conjunction with a pot-shaped battery compartment. The battery pack can also have a different shape.

[0014] The battery pack has, in particular, an insertion section and a gripping section. The insertion section is the section of the battery pack that is inserted into the battery compartment of the hand shears. The insertion section is inaccessible to the operator when inserted. Contacts for the electrical connection to the hand shears are formed on the insertion section. The gripping section of the battery pack is accessible to the operator when the battery pack is inserted. The operator grasps the gripping section of the battery pack to insert and / or remove it from the hand shears.

[0015] Because the electric hand shears feature a housing with a compartment for storing a plate-shaped tool for operating the control contour, the tool for adjusting the blade clearance is always handy and tidy. The tool is removed from the compartment to adjust the blade clearance and stored back in the compartment after adjustment.

[0016] The term "platelet-shaped" describes a thin, flat, rigid body. The body may have bevels and / or beads. The wall thickness of the body is, in particular, uniform.

[0017] Because the on-board tool is a small plate with a peripheral edge on which edges, in particular of different edge lengths, are formed, which are designed to engage with the actuating contour of the adjusting device, several tools are formed on a single on-board tool by the respective edges of the peripheral edge. A first edge length can be adapted to a dimension of a first actuating contour of a first screw connection of the adjusting device and a second edge length can be adapted to a dimension of a second actuating contour of a second screw connection of the adjusting device. As a result, only a single on-board tool needs to be carried for adjusting the blade play. The thickness of the small plate is in particular smaller than the smallest edge length. Little space is required to accommodate the small-plate-shaped on-board tool. The on-board tool can in particular be a metal stamped part.As a result, the tool kit has a smaller volume, particularly a smaller thickness, and a lower weight than, for example, two standard hex wrenches, which have a width corresponding to the first and second edge lengths. This allows the storage compartment for the tool kit to be designed more compactly, and the hand tool, even with the tool kit in the storage compartment, weighs only slightly more than without it. This way, the hand tool remains ergonomic in handling, yet the tool for adjusting the blade play is always accessible.

[0018] By loosening a first screw connection, in particular a fixing screw connection, with the first edge of the on-board tool and then using a second edge of the on-board tool to operate a second screw connection, the adjusting screw connection for adjusting the blade play, the blade play can be adjusted using a single on-board tool. The plate-shaped on-board tool only needs to be rotated between the user's fingers to switch between the first edge and the second edge. After the fixing screw connection is tightened, the on-board tool is stowed back in the storage compartment and the battery pack is inserted into the battery compartment. In this way, the tool for adjusting the blade play is attached to the electric hand shears until the next use.

[0019] Because the on-board tool is securely stored in the compartment when the battery pack is inserted in the battery compartment, the on-board tool cannot be lost. In particular, it is provided that the on-board tool cannot be removed from the compartment when the electric hand shears are in the ready-to-use state. This ensures that the blade play cannot be adjusted when the electric hand shears are in the ready-to-use state. Because the battery pack is first removed from the battery compartment, the electric hand shears are deactivated before the on-board tool is removed from the compartment. In one embodiment, it is provided that the compartment is inaccessible to the operator when the hand shears are in the ready-to-use state. This ensures that the blade play can only be adjusted when the hand shears are in a non-operational state.In particular, it is provided that the receiving compartment adjoins the battery compartment, in particular a peripheral wall of the battery compartment. In one embodiment, the battery pack inserted in the battery compartment closes a removal opening of the receiving compartment, so that the on-board tool arranged in the receiving compartment cannot be removed from the receiving compartment. The removal opening can in particular be arranged within the battery compartment. The on-board tool is in particular inserted into the housing of the electric hand shears through one and the same opening as the battery pack. Alternatively, the removal opening can be formed separately from a battery compartment opening. In particular, the removal opening is arranged adjacent to the battery compartment opening, so that a part of the battery pack that projects radially beyond the battery compartment opening with respect to the insertion direction of the battery pack at least partially covers the removal opening and prevents removal of the on-board tool.

[0020] In one embodiment, the receiving compartment has a flat shape. The receiving compartment has a width and thickness measured transversely to the insertion direction and a length measured in the insertion direction. The thickness is many times smaller than the width and length. The width and length differ from each other in particular by less than a factor of two, in particular less than a factor of 1.5. In one embodiment, a length-width plane of the receiving compartment lies parallel to a peripheral wall of the battery compartment. In particular, the battery compartment has a circular arc-triangular shape in cross-section and the receiving compartment extends parallel to one of the three straight peripheral walls. In one embodiment, the receiving compartment has a width that is more than 50%, in particular more than 70% of a width of the battery compartment measured in the same direction.This allows the compartment to accommodate a plate-shaped tool with a width corresponding to the width of the compartment. The width of the plate-shaped tool influences the torque that can be applied manually to the actuating contour of the adjustment device. The wider the plate, the greater the torque that can be applied manually.

[0021] If the first screw connection is tightened too much, additional oxidation of the first screw connection may make it impossible to loosen without damage, making it impossible to easily adjust the blade play. If the second screw connection is tightened too much, this reduces the cutting performance of the electric hand shears and / or their battery life. To prevent the user from tightening the first and / or second screw connection too much, the plate-shaped on-board tool has a thickness of no more than 2.5 mm, in particular no more than 2.0 mm, and most particularly no more than 1.5 mm. The torque that can be applied using the plate-shaped on-board tool is limited by the torsional stiffness of the plate. Plastic deformation of the on-board tool is not intended when the torque is applied.

[0022] The first screw connection has, in particular, a nominal thread diameter of 5 mm and a tightening torque of at most 5 Nm. Oxidation of the screw connection can unintentionally increase the loosening torque. In one embodiment, the on-board tool has an opening, in particular a centrally located opening. The opening is designed, in particular, as a gripping opening and facilitates the removal of the on-board tool from the storage compartment, since the user can reach into the gripping opening to exert force on the on-board tool. When using the on-board tool, the opening can also be used to pass a rod through in order to increase the loosening torque that can be applied by the user to the first screw connection if necessary, in particular to 6 Nm to 10 Nm. The second screw connection has, in particular, a nominal thread diameter of 10 mm or 8 mm, in particular 10 mm.Due to the larger nominal thread diameter of the second screw connection, users tend to tighten the second screw connection with a higher torque, thereby pressing the blades together too tightly. The plate-shaped design of the on-board tool limits the torque that can be applied, in particular to a maximum of 3 Nm, and even more so to a maximum of 2 Nm.

[0023] In one embodiment, the actuating contour of the screw connection is arranged radially outside the nominal thread diameter of the screw connection and within a head diameter of the screw connection. Due to the effective diameter lying outside the nominal thread diameter, the torsional moment acting on the plate-shaped on-board tool can be reduced compared to an effective diameter lying within the nominal thread diameter. Such a design is particularly useful for screw connections with a nominal thread diameter of less than or equal to 10 mm in order to prevent plastic deformation of the plate-shaped on-board tool. The actuating contour is, in particular, slot-shaped, and the edge of the on-board tool engages in the slot.

[0024] Further features of the invention will become apparent from the description and the drawing, which illustrates exemplary embodiments of the invention described in detail below. They show: Fig. 1 a side view of an electric hand shears according to the invention, here in an exemplary embodiment as a pruning shears, with a battery pack arranged on the hand shears and on-board tools arranged in the receiving compartment Fig. 2 a detailed view of the adjustment device of the electric hand shears from Fig. 1 according to detail Z in Fig. 1 Fig. 3 a plate-shaped on-board tool Fig. 4 a perspective view of the blade arrangement and the adjustment device from Fig. 2 with on-board tools shown in different rotational positions Fig. 5 a perspective, partial view of the electric hand shears from Fig. 1 according to detail W in Fig. 1 without battery pack in the battery compartment Fig. 6A, Fig. 6B, Fig. 6C sectioned detail views of the Fig. 1 in the area of ​​the receiving compartment ( Fig. 6A) with the on-board tool ( Fig. 6B) and the battery pack located in the battery compartment ( Fig. 6C) along the arrows VI-VI in Fig. 5 Fig. 7A, Fig. 7B, Fig. 7C sectioned detail views according to Fig. 6A, Fig. 6B and Fig. 6C with an alternative design of the receiving compartment.

[0025] Fig. 1 shows an electric hand shear 1 in the form of a pruning shear. The electric hand shear 1 has a blade assembly 3 for cutting material, in particular twigs and branches, at its front end of the housing 2. The electric hand shear 1 has a battery compartment 4 for receiving a battery pack 5 at its rear end of the housing 2. When the battery pack 5 is inserted in the battery compartment 4, an insertion section 6 ( Fig. 6C) of the battery pack 5, in particular invisible from the outside, is accommodated in the battery compartment 4 and a gripping section 7 of the battery pack 5 protrudes from the battery compartment 4. On the gripping section 7, an unlocking element 8 is arranged for unlocking the battery pack 5 relative to the battery compartment 4. Between the first end and the second end, in particular at a constriction of the housing 2, a handle 9 for holding the hand shears 1 is formed. In an operational state, the drive motor 11 can be controlled by actuating an operating element 10 such that the blades 3a, 3b move relative to one another in order to perform a cut, as indicated by the arrow a in Fig. 1. Arranged in the housing 2 are a drive motor 11 and a gear 12 for driving the blade arrangement 3, which are schematically shown with a dotted line. The drive motor 11 is designed as an electric motor. The gear 12 is arranged between the drive motor 11 and the blade arrangement 3. The gear 12 reduces the speed of the drive motor 11 and / or converts the rotation of the drive motor 11 into an oscillating movement of at least one blade 3a of the blade arrangement 3. In the exemplary embodiment, only one blade 3a is driven and the other blade 3b is fixed relative to the housing 2. In the exemplary embodiment, both blades 3a, 3b are ground. Furthermore, the housing 2 accommodates a control unit (not shown) for controlling the drive motor 11 and / or the gear 12.

[0026] To adjust the blade play, the electric hand shears 1 have an adjusting device 13 which is Fig. 2 is shown in detail. The adjusting device 13 comprises a first screw connection 14 for fixing the set blade play and a second screw connection 17 for adjusting the blade play. The first screw connection 14 comprises a fixing screw 15 and an intermediate element 16. The fixing screw 15 is screwed into a threaded opening in the housing 2 and / or the fixed blade 3b. The intermediate element 16 is clamped when the fixing screw 15 is tightened. The second screw connection 17 comprises a bolt 18 on which the at least one driven blade 3a is pivotally mounted. In the exemplary embodiment, the bolt 18 has a flattened section by which it is mounted in a rotationally fixed manner relative to the housing 2. The bolt 18 also extends through the fixed blade 3b and projects beyond it with a threaded section. An adjusting nut 19 is screwed onto the threaded section.Loosening the adjusting nut 19 reduces the blade play, and tightening the adjusting nut 19 increases the blade play. If the blade play is already zero millimeters, both blades 3a, 3b are in contact with one another, and loosening the adjusting nut 19 reduces the preload of the blades 3a, 3b, while tightening the adjusting nut 19 increases the preload of the blades 3a, 3b relative to one another. The adjusting nut 19 has a locking contour 20 on its circumference, with which a mating contour 21 of the intermediate element 16 can be brought into positive engagement. The mating contour 21 is immobile when the first screw connection 14 is tightened, and its engagement with the locking contour 20 prevents the adjusting nut 19 from turning. When the first screw connection 14 is loosened, the mating contour 21 can rotate when the adjusting nut 19 is adjusted. A different design of the locking contour 20 and counter contour 21 is also possible.The first screw connection 14 and the second screw connection 17 have screw axes 22, 23 that are parallel to each other.

[0027] Both the adjusting nut 19 and a head 24 of the fixing screw 15 are set back or flush with a side surface 28 of the housing 2, as for example in Fig. 4. This prevents the vehicle from getting caught in undergrowth or similar, and the narrow width B1 ( Fig. 4) Use the hand shears 1 to make cuts close to branch forks or similar boundaries. To manually operate the screw connections 14, 17, a tool is required that is inserted in the direction of the screw axes 22, 23.

[0028] The bolt 18 and the adjusting nut 19 are designed in the exemplary embodiment with a nominal thread diameter of 10 mm. The fixing screw 15 is designed in the exemplary embodiment with a nominal thread diameter of 5 mm. The adjusting nut 19 is designed in particular as an open nut, which has an actuating contour 27 on its front side for engagement with a second edge 32 of the on-board tool 30. The front side of the adjusting nut 19 delimits the adjusting nut 19 in the direction of the screw axis 23. The actuating contour 27 is designed in the exemplary embodiment as a slot in the front side of the adjusting nut 19. The width B 27 of the slot is to the thickness D 30 ( Fig. 4) of the plate-shaped on-board tool 30, such that the on-board tool 30 can be inserted into the slot and in particular at most 120%, in particular at most 110% of the thickness D 30of the on-board tool 30. The slot extends in particular over the entire diameter D 19 the adjusting nut 19 and is interrupted by the opening of the adjusting nut 19. The head 24 of the fixing screw 15 has a diameter D 24 On the front side of the head 24 of the fixing screw 15, an actuating contour 26 is formed for engagement with a first edge 31 of the on-board tool 30. In the exemplary embodiment, the actuating contour 26 is designed as a slot in the front side of the head 24. The width B 26 of the slot is to the thickness D 30 of the plate-shaped on-board tool 30, such that the on-board tool 30 can be inserted into the slot and in particular at most 120%, in particular at most 110% of the thickness D 30 of the on-board tool 30. The slot extends in particular over the entire diameter D 24of the head 24 of the fixing screw 15 and is interrupted, in particular, by a recess 25. The recess 25 can be a conventional internal contour such as a hexagon socket or a multi-tooth head. Because the actuating contour 26 lies radially outside the recess 25 with respect to the first screw axis 22, the effective diameter for applying a moment to the fixing screw 15 is increased, so that the force acting on the first edge 31 of the on-board tool 30 is smaller. Damage, i.e., plastic deformation, of the on-board tool 30 can thus be avoided.

[0029] How Fig. 3, the plate-shaped tool 30 has an outer contour that is delimited by a peripheral edge 33. The tool 30 has a central axis 34, about which it is rotated during use to actuate the first screw connection 14 or the second screw connection 17. The central axis 34 intersects the peripheral edge 33 at a first end face 35 and at a second end face 36 of the peripheral edge 33. The tool 30 has a first extension 37 with a length L on the first end face 35. 37 and a width B 37 The on-board tool 30 has a second extension 38 with a length L on the second end face 36 38 and a width B 38 and a third extension 39 with a length L 39 and a width B 39The central axis 34 runs through a free space 40 formed between the second extension 38 and the third extension 39. The first edge 31 of the on-board tool 30 is formed on the peripheral edge 33, in particular the first extension 37. The edge length L 31 the first edge 31 corresponds in particular to the width B 37 of the first process 37. The edge length L 31 the first edge 31 is larger than the nominal thread diameter of the first screw connection 14, in particular at least as large as the diameter D 24of the head 24. In this way, the first extension 37 and the slot on the head 24 of the fixing screw 15 interact over the largest possible area and the largest possible effective diameter. The second edge 32 of the on-board tool 30 is formed on the peripheral edge 33, in particular the second extension 38 and the third extension 39. Through the free space 40, the on-board tool 30 can be inserted with its second edge 32 into the, in particular slot-shaped, actuating contour 27 of the adjusting nut 19, without the peripheral edge 33 contacting the free end of the bolt 18. The width B 40 of the free space 40 is larger than the nominal thread diameter of the second screw connection 17. The length L 40 of the free space 40 is greater than a displacement v of the adjusting nut 19 in the direction of the second screw axis 23 when tightening the adjusting nut 19. The edge length L 32 the second edge 32, which is the sum of the width B 38of the second extension 38, width B 39 of the third extension 39 and the width B 40 of the clearance 40 is at least 70% of the diameter D 19 of the adjusting nut 19 in the area of ​​the actuating contour 27. In this way, the second extension 38 and the third extension 39 interact with the slot on the end face 36 of the adjusting nut 19 over the largest possible area and the largest possible effective diameter. The width B 38 of the second extension 38 is in particular equal to the width B 39 of the third process 39. The width B 38 of the second extension 38 is in particular less than 10 mm, in particular between 4 mm and 6 mm. The width B 38 of the second extension 38 is in particular smaller than the width B 37 of the first process 37. The edge length L 31 the first edge 31, which in particular corresponds to the width B 37of the first extension 37, is less than 20 mm in the exemplary embodiment, in particular between 8 mm and 12 mm. The edge length L 32 the second edge 32 is in particular less than 40 mm, in particular between 15 mm and 25 mm.

[0030] The second extension 38 forms, in particular, a third edge for engaging a third actuating contour (not shown). The third actuating contour is formed on a third screw connection, which serves to fasten the fixed blade 3b to the housing 2. The third actuating contour is designed, in particular, as a slot-shaped recess in the head of a fastening screw. The third screw connection is actuated, in particular, from a different side of the hand shears 1 than the first screw connection 14 or the second screw connection 17.

[0031] Longitudinal sides 41, 42 of the peripheral edge 33 extend between the first end face 35 and the second end face 36. The longitudinal sides 41, 42 extend, in particular, at an angle of less than or equal to 15°, in particular less than or equal to 5°, to the central axis 34, most particularly parallel to the central axis 34. In the exemplary embodiment, concave locking sections 43 are formed on both longitudinal sides 41, 42. It is also possible to provide only one locking section 43 or no locking section 43.

[0032] In order to apply a loosening or tightening torque using the on-board tool 30, it must be rotated on the long sides 41, 42 around the central axis 34. The operating force required for this is lower the further the long sides 41, 42 are from the central axis 34, ie the greater the width B 30of the on-board tool 30. In order to avoid a collision of the on-board tool 30 with the adjacent screw connection 14, 17 and / or the housing 2 when rotating the on-board tool 30 about the central axis 34, the width B measured between the long sides 41, 42 30 of the on-board tool 30 at the end faces 35, 36. In particular, the second extension 38 and / or the third extension 39 are spaced apart from the longitudinal sides 41, 42. As a result, the distance between the longitudinal sides 41, 42 in a gripping section 44 of the on-board tool 30 is increased, yet the on-board tool 30 can still be used with a relatively close center distance between adjacent screw connections 14, 17. A close center distance is defined here as a distance between two screw axes 22, 23 that is smaller than the diameter D 19 the adjusting nut 19.

[0033] Because the on-board tool 30 can always be carried in the storage compartment 50 of the electric hand shears 1 when not in use, the weight of the on-board tool 30 should be as low as possible. The limits of the width B 30 and thickness D 30 of the on-board tool 30 are essentially determined by the operating force and rigidity of the on-board tool 30. By reducing the length L 30 The weight can be reduced by using the on-board tool 30. The length L 30 of the on-board tool 30 is measured in the direction of the central axis 34. The length L 30 In the exemplary embodiment, the amount essentially corresponds to the width B 30 of the on-board tool 30. The length L 30 of the on-board tool 30 is in particular at most twice as large as the width B 30of the on-board tool 30. Because the first edge 31 and the second edge 32 of the on-board tool 30 are arranged on opposite end faces 35, 36, one and the same longitudinal section of the on-board tool 30 can be used as a gripping section 44 for gripping the on-board tool 30 when the on-board tool 30 is used to actuate the first screw connection 14 or the second screw connection 17. In order to further reduce the weight of the on-board tool 30, the on-board tool 30 has an opening 45. In the exemplary embodiment, the opening 45 is designed so large that it serves as a gripping opening. The on-board tool 30 can be pulled out of the receiving compartment 50 at the opening 45 by the operator pressing against the edge of the opening 45 with his finger. The opening 45 can also be used to guide an auxiliary tool through the opening 45 and to further increase the lever arm if necessary.

[0034] The plate-shaped on-board tool 30 is made, in particular, from a sheet metal, for example, by punching or laser cutting. Because the edges 31, 32 on the end faces 35, 36 form different tools, various tools can be provided very cost-effectively, quickly, and in a single on-board tool 30. The central axis 34, in particular, forms an axis of symmetry to which the extensions 37, 38, 39 are mirror-symmetrical.

[0035] Fig. Figure 4 shows the on-board tool 30 in use, in which the on-board tool 30 acts once with the first edge 31 on the, in particular slot-shaped, actuating contour 26 of the first screw connection 14 and once with the second edge 32 on the, in particular slot-shaped, actuating contour 27 of the second screw connection 17 of the adjusting device 13. The on-board tool 30 is shown twice in the illustration, but this is only intended to show the different rotational positions of the on-board tool 30. The on-board tool 30 only needs to be turned to switch from actuation with the first edge 31 to actuation with the second edge 32. Fig. 4 also clearly shows how the housing 2 of the hand shears 1 limits the adjustment device 13 radially with respect to the screw axes 22, 23.

[0036] How Fig. 5 shows, a receiving compartment 50 for the on-board tool 30 is arranged adjacent to the battery compartment 4 in the exemplary embodiment. When the battery pack 5 is removed, the on-board tool 30 is visible through the insertion opening 46 of the battery compartment 4. The on-board tool 30 can be removed and reinserted through the insertion opening 46 of the battery compartment 4. One of the end faces 35, 36 of the peripheral edge 33 of the on-board tool 30 faces a bottom 48 of the battery compartment 4. The on-board tool 30 is guided in the receiving compartment 50 via the long sides 41, 42 when inserted or removed. In particular, at least one spring element 49 is provided, which is compressed when the on-board tool 30 is pushed into the receiving compartment 50 and relaxes when the on-board tool 30 is removed from the receiving compartment 50. The spring element 49 engages in particular in the locking recess 43 on the long side 41, 42 of the on-board tool 30.The spring element 49 is, in particular, a hollow rubber block that is received between ribs of the housing 2. The receiving compartment 50 runs parallel to an insertion direction 29 ( ). Fig. 6B) of the battery pack 5 and parallel to a peripheral wall 47 of the battery compartment 4. The battery compartment 4 has a circular arc-triangular shape. The width B4 of the battery compartment 4 is greater than the width B 50 of the receiving compartment 50 and the width B 30 of the on-board tool 30. In the exemplary embodiment, the width B 50 of the receiving compartment 50 approximately 75% of the width B4 of the battery compartment 4. How Fig. 5 shows, one of the peripheral walls 47 is shortened so that a removal opening 51 of the receiving compartment 50 is formed in this area. Because the receiving compartment 50 is accessible from the battery compartment 4 and the on-board tool 30 is clearly visible when the battery pack 5 is removed, the operator is regularly reminded to check the blade play and / or to perform maintenance on the blade arrangement 3 when removing the battery pack 5, for example to charge the battery pack 5. A marking can be provided in the receiving compartment 50 which indicates that the fully inserted position of the on-board tool 30 has been reached. A marking can also be provided in the receiving compartment 50 which is only visible when the on-board tool 30 is removed and is otherwise covered by the on-board tool 30 and in this way reminds the operator to reinsert the on-board tool 30 after use.

[0037] The Fig. 6A, Fig. 6B and Fig. 6C show the design of the receiving compartment 50 of the hand scissors 1 from Fig. 1 in a section parallel to the plane of the sheet as indicated by arrows VI-VI in Fig. 5: once before inserting the on-board tool 30 and the battery pack 5 ( Fig. 6A), once with the on-board tool 30 already inserted, but the battery pack 5 still removed ( Fig. 6B) and once with the on-board tool 30 and battery pack 5 inserted ( Fig. 6C). As in Fig. 6A, the receiving compartment 50 is arranged on the peripheral wall 47 of the battery compartment 4, and the peripheral wall 47 is shortened. The receiving compartment 50 has a flat shape, ie, the thickness D 50 of the receiving compartment 50 is many times smaller than its width B extending transversely thereto 50 ( Fig. 5) and length L 50 . The thickness D 50 of the receiving compartment 50 corresponds to the thickness D 30of the on-board tool 30 which can be inserted into the receiving compartment 50. In the exemplary embodiment, the thickness D 50 of the receiving compartment 50 approximately the thickness D 30of the on-board tool 30, so that the on-board tool 30 can still be easily removed from the receiving compartment 50 by hand. The receiving compartment 50 is formed entirely within the housing 2. The on-board tool 30 inserted in the receiving compartment 50 is stored entirely within the housing 2. To facilitate the insertion and / or removal of the on-board tool 30, the housing 2 has a ramp 52 which runs from the battery compartment 4 to the receiving compartment 50. The ramp 52 runs at an angle α of 1° to 10°, in particular 5°, to the peripheral wall 47. The ramp 52 bridges the parallel offset between the receiving compartment 50 and the battery compartment 4. When the battery pack 5 is inserted in the battery compartment 4, the insertion opening 46 of the battery compartment 4 is closed by the battery pack 5, in particular the insertion section 6 of the battery pack 5. When the battery pack 5 is inserted in the battery compartment 4, the on-board tool 30 is not visible from the outside.The on-board tool kit 30 is not accessible to the operator as long as the battery pack 5 is inserted. The battery pack 5 blocks the removal opening 51 of the receiving compartment 50.

[0038] The Fig. 7A, Fig. 7B and Fig. 7C show an alternative design of the receiving compartment 50' analogous to the Fig. 6A, Fig. 6B and Fig. 6C, in which the removal opening 51' of the receiving compartment 50' is arranged outside the battery compartment 4, in particular next to the insertion opening 46 of the battery compartment 4. The same reference numerals correspond to the same elements of the previously described embodiment. As can be seen, the receiving compartment 50' is arranged parallel to the peripheral wall 47 of the battery compartment 4. The receiving compartment 50' has a flat shape, ie, the thickness D 50 of the receiving compartment 50' is many times smaller than its width B extending transversely thereto 50 and length L 50 . The thickness D 50of the receiving compartment 50' corresponds to the thickness D 30 of the on-board tool 30 that can be inserted into the receiving compartment 50'. In the exemplary embodiment, the thickness D 50 of the receiving compartment 50' approximately the thickness D 30of the on-board tool 30, so that the on-board tool 30 can still be easily pushed out or removed from the receiving compartment 50' using the ejection force of an ejection mechanism and / or the manual force of the operator. The receiving compartment 50' is formed entirely within the housing 2. The on-board tool 30 inserted in the receiving compartment 50' is stored entirely within the housing 2. To facilitate the insertion and / or removal of the on-board tool 30, the receiving compartment 50' is wider in the region of its removal opening 51' than at its end remote from the removal opening 51'. It can be provided that an ejection mechanism (not shown) is arranged in the receiving compartment 50', which pushes the plate-shaped on-board tool 30 a graspable length out of the receiving compartment 50' when the operator triggers the ejection mechanism, for example by pressing on the front side 36 of the on-board tool 30.When the battery pack 5 is inserted into the battery compartment 4, the removal opening 51' of the receiving compartment 50' is closed by the battery pack 5, in particular by its gripping section 7. When the battery pack 5 is inserted into the battery compartment 4, the on-board tool 30 is not visible from the outside. The on-board tool 30 is not accessible to the operator as long as the battery pack 5 is inserted. The battery pack 5 blocks the removal opening 51' of the receiving compartment 50'.

[0039] Because the on-board tool 30 is completely accommodated in the receiving compartment 50, 50', the on-board tool 30 does not protrude beyond the receiving compartment 50, 50'. This reliably prevents brushwood from getting caught on the on-board tool 30. In a further development of the invention, the housing 2 can be provided with a viewing window through which the on-board tool 30 arranged in the receiving compartment 50, 50' is visible from the outside, but in particular cannot be removed through this window. In this way, an operator can determine at any time whether he is actually carrying the on-board tool 30 with the electric hand shears 1.

[0040] When the battery pack 5 is removed from the battery compartment 4, the electric hand shears 1 are deactivated. The operator can then remove the on-board tool 30 from the receiving compartment 50, 50' and loosen the fixing screw 15 with the first edge 31 of the on-board tool 30. This allows the intermediate element 16 to rotate relative to the fixing screw 15 when a moment acts on the intermediate element 16. The operator can now engage the actuating contour 27 of the adjusting nut 19 with the second edge 32 of the on-board tool 30 and turn the adjusting nut 19. The locking contour 20 of the adjusting nut 19 rotates with it and exerts a moment on the counter contour 21 of the intermediate element 16 that engages with the locking contour 20. In addition, the blade play changes according to the direction of rotation of the adjusting nut 19. To lock the selected blade play, the fixing screw 15 is tightened with the first edge 31 of the on-board tool 30.This clamps the intermediate element 16, and rotation of the adjusting nut 19 is no longer possible due to the mating contour 21 of the intermediate element 16 and the locking contour 20 of the adjusting nut 19 engaging with each other. Finally, the on-board tool 30 is reinserted into the receiving compartment 50, 50' and the battery pack 5 is reinserted into the battery compartment 4.

Claims

[1] Electric hand shears (1) comprising a drive motor (11) for driving at least one blade (3a) of a blade arrangement (3), b. an adjusting device (13) for adjusting a blade play of the blade arrangement (3), wherein the adjusting device (13) has at least one screw connection (14, 17) with an actuating contour (26, 27), c. a housing (2) with a battery compartment (4) for reversibly accommodating a battery pack (5) for supplying the drive motor (11) with energy, characterized by that the housing (2) has a receiving compartment (50, 50') for storing a plate-shaped on-board tool (30) for actuating the actuating contour (26, 27). [2] Electric hand shears (1) according to claim 1, characterized by that the receiving compartment (50, 50') is inaccessible to the operator when the hand shears (1) are in an operational state. [3] Electric hand shears (1) according to one of the preceding claims, characterized by that the receiving compartment (50, 50') adjoins the battery compartment (4), in particular a peripheral wall (47) of the battery compartment (4). [4] Electric hand shears (1) according to one of the preceding claims, characterized by that the receiving compartment (50, 50') has a removal opening (51, 51') for removing the on-board tool (30) that can be arranged in the receiving compartment (50, 50'), wherein the removal opening (51) is arranged within the battery compartment (4) and / or wherein the removal opening (51, 51') is closed by a battery pack (5) arranged on the hand shears (1). [5] Electric hand shears (1) according to one of the preceding claims, characterized by that the receiving compartment (50, 50') has a flat shape. [6] Electric hand shears (1) according to one of the preceding claims, characterized by that the receiving compartment (50, 50') has a width (B 50 ) which is more than 50%, in particular more than 70% of a width (B4) of the battery compartment (4). [7] On-board tool (30) for an electric hand shear (1) according to one of the preceding claims, characterized by that the on-board tool (30) is a plate with a peripheral edge (33), wherein edges (31, 32), in particular of different edge lengths (L 31 , L 32 ), which are designed to engage in the actuating contour (26, 27) of the adjusting device (13). [8] On-board tool (30) according to claim 7, characterized by that the on-board tool (30) has an opening (45), in particular a centrally arranged one. [9] System comprising electric hand shears (1) according to one of claims 1 to 6, on-board tool (30) according to one of claims 7 to 8 and battery pack (5), characterized by that the on-board tool (30) is arranged in a captive manner in the receiving compartment (50, 50') when the battery pack is arranged on the hand shears, in particular when the battery pack (5) is inserted in the battery compartment (4). [10] Method for adjusting a blade play of an electric hand shear (1) according to one of the preceding claims 1 to 6, comprising the steps a. Removing the battery pack (5) from the battery compartment (4), b. Removal of the on-board tool (30) from the storage compartment (50, 50'), c. Loosening a first screw connection (14) of the adjusting device (13) by means of the on-board tool, in particular with a first edge (31) of the on-board tool (30), d. Adjusting the blade play by loosening or tightening a second screw connection (17) of the adjusting device (13) by means of the on-board tool, in particular with a second edge (32) of the on-board tool (30), e. Tightening the first screw connection (14) of the adjusting device (13) by means of the on-board tool, in particular with the first edge (31) of the on-board tool (30), f. Inserting the on-board tool (30) into the receiving compartment (50, 50') g. Insert the battery pack (5) into the battery compartment (4).

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