CUTTING DEVICE

Description

[0001] The present invention relates to a cutting device, in particular a garden cutting device, with at least a first and a second cutting element movable relative to one another, with a first and a second lever element, in particular a handle element, movable relative to one another for opening and closing the cutting elements. State of the art

[0002] Such cutting devices are known, for example, as branch shears or garden shears. An angular or transmission ratio for a movement of the lever or handle elements relative to a corresponding movement of the cutting elements is i ≥ 1, or the opening angle of the lever elements is greater than or equal to the corresponding opening angle of the cutting elements. This allows the force typically exerted manually on the lever or handle elements to be increased, allowing even thick branches to be severed. Further reference is made to the publications JP 2010 000129 A, FR 2 569 521 A1, EP 1 568 266 A1, and EP 0 421 108 B1. Disclosure of the invention

[0003] A cutting device having the features of claim 1 is proposed. Advantageous embodiments, variants, and further developments of the invention can be found in the subclaims.

[0004] The invention relates to a cutting device, in particular a garden cutting device, having at least a first and a second cutting element movable relative to one another, having a first and a second lever element, in particular a handle element, movable relative to one another for opening and closing the cutting elements.

[0005] It is proposed that a displacement of the lever elements by a first angle causes a displacement of the cutting elements by a second angle, wherein the second angle is greater than the first angle, in particular one and a half to three times as large, preferably twice as large. The proposed cutting device can be used, for example, in landscaping and horticulture as garden shears, branch shears, vine shears, pole pruner, or garden or branch shears on a particularly telescopic or length-adjustable extension device, or the like. It is preferably intended for use as garden or branch shears. It can be actuated via handle elements designed as lever elements, a movement mechanism on a handle element that actuates the lever elements, or it can also be motorized or semi-manually / motorized. The lever elements can also be designed to be displaceable by motor and / or semi-motor.Because a displacement of the lever elements by a first angle causes a displacement of the cutting elements by a second angle, where the second angle is greater than the first angle, the area of ​​application of the cutting device is expanded and / or improved. Despite the relatively small opening angle of the lever elements, the cutting elements can be opened relatively wide. This means that the cutting devices can be used extensively even in confined spaces. For example, inside bushes or trees, even thick branches that require a large opening angle of the cutting elements can be cut through, although the lever elements, in particular the handle elements, can only be opened to a limited extent because they might strike adjacent branches, for example.With pruning shears where the opening of the handle elements is limited by the user's hand size, the opening angle can be increased, allowing even thick branches to be cut. Furthermore, the closing speed of the cutting elements, or their cutting speed, can be increased by gearing them up. This allows the number of cuts per unit of time to be increased.

[0006] A gear and / or a connector is proposed that translates a movement of the lever elements relative to a movement of the cutting elements with a ratio i < 1. This enables a rapid translation with the aforementioned advantages, in particular accessibility, comfort, increased cutting element opening angle, and / or increased cutting speed.

[0007] It is proposed that the connector be a gearwheel, wherein the gearwheel is rotatably mounted on the second lever element and is supported, in particular, in a force-transmitting manner, on the one hand, against a toothed section of the first lever element and, on the other hand, against a toothed section of the second cutting element. This creates a device for implementing the opening angle ratios according to the invention between lever elements and cutting elements, or for speed transmission. Furthermore, a rotating drive unit can be coupled, for example, via the gearwheel, in particular for partially manual or fully motorized operation of the cutting device. Nevertheless, the drive unit can also have many other power transmission types, as explained further below.

[0008] Furthermore, a cutting device is proposed, comprising a drive unit, in particular a motor drive unit, which is provided in at least one operating state to at least assist a movement of the second cutting element relative to the first cutting element. Such mechanisms can be found, for example, in the applications DE102015206959A1 or DE102016211975A1 of Robert Bosch GmbH. In particular, their figure descriptions show a drive unit, clutch unit, reset unit, gear unit, cable winch and / or a drive force transmission element, in particular a drive force transmission element positioned in an opening spring of the handle elements, in particular in the form of a cable. Reference is also made, by way of example, to DE102015206959A1 (cf. in particular Fig. 1 , 2 , 8-18), DE102016211975A1 (cf. in particular Fig. 2-5 ), DE102010016296B4 (see in particular Fig. 1-4 ), WO2008023117A2 (cf. in particular Fig. 1 , 2a, 2b, 4). The structure and arrangement of the drive elements shown therein, particularly for the semi-manual operation of cutting devices, are also applicable to the present invention and should therefore be understood as embodiments for possible drive units and drive elements of this application.

[0009] These mechanisms can, particularly in accordance with the aforementioned publications, act on the lever or handle elements of the cutting device. However, it is also conceivable for a drive force transmission element to act on the connector, the gear, and / or the cutting element. A linear drive, for example, with rods, pull cables, or pull / push wires, for example, pull / push wires guided in a sleeve, as well as other pull and / or push mechanisms for opening and / or closing the cutting or lever elements or the like, can be used. The drive unit can be arranged in or on at least one lever element or handle element.

[0010] Furthermore, a sensor or a sensor-acting device can be provided for detecting a force acting on the lever element(s) and / or the grip element(s) and / or a force threshold, in particular operating, separating, and / or manual force. This can be provided, for example, analogously to the following applications: DE102016211975A1 (cf. BZ 40, Fig. 2-3 ), DE102010016296B4 (cf. BZ 16, Fig. 1 as well as [0005, 0006, 0009, 0010]), WO2008023117A2 (BZ 13 Fig. 2a, 2b), DE20205106U1 (BZ 26, Fig. 6 ), FR2462094 (BZ 10, 10' Fig. 1 , 2 ). Other sensor elements for detecting a hand force, a displacement (displacement sensor) or the like are also conceivable, e.g. strain gauges, load cells or the like.

[0011] A mechanism for detecting a force threshold above which support operation is activated can, for example, be found in DE102016211975A1 (cf. BZ 40, Fig. 2-3 ) can be removed. A spring preloads a cutting element against a lever or handle element, wherein the cutting element and lever / handle element can be slightly displaced relative to one another, in particular are designed to be displaceable about a common pivot point. If a cutting force acts on the cutting element and a hand force acts on the handle or lever element which is not sufficient to sever the object to be cut, but is sufficient to compress the spring, a switch is activated above a certain displacement path, in particular an adjustable displacement path, which switches on the support mode or the drive unit. In this way, with particularly robust mechanical elements and simple electronic elements, a force threshold-dependent activation of the drive unit or the support mode can be implemented. However, this mechanism also makes object detection between the lever or handle elements particularly advantageous.Handle elements are implemented because, when an object is arranged between the lever or handle elements, regardless of the applied hand force, no displacement of the handle element and cutting element around the common pivot point can occur. In this respect, crushing of the operator's hand, a finger, or the like can be avoided. Assistance operation is avoided. Overloading or damage to the cutting device is avoided. However, it is also conceivable that an object recognition sensor is mounted between the lever or handle elements, for example a visual, tactile, or proximity sensor. Such an arrangement is also described in the present application (cf. Fig. 9 can be found.

[0012] Such as DE102016211975A1 (cf. Fig. 2 , handle elements 16, 18), DE102010016296B4 (BZ 2, 6, 13 scissor half, handle, accumulator Fig. 1-2 ) or FR2462094 (BZ 6, 6' Fig. 1 , 2), cutting devices, in particular garden shears, are typically somewhat thicker due to the provision of manual force assistance and the drive elements required as a result, which can be accommodated in the lever or handle elements. In particular, one or both lever or handle elements become thicker because they have to accommodate the drive train elements, batteries, control elements, sensors or the like. Because the lever or handle elements therefore become wider or thicker, particularly in the pivoting direction, the free pivoting angle of the cutting device is reduced in relation to a constant hand dimension. For ergonomically sensible operation or an ergonomically sensible design of garden shears, they must be designed for different hands, but at most for large human hands. This means that the maximum external distance between the handle elements is, to a certain extent, predetermined.In order to continue to enable large opening angles of the cutting elements, particularly opening angles similar to those in purely mechanical (slim) cutting devices, in particular in cutting devices of this type. Because, according to the invention, a displacement of the lever elements by a first angle causes a displacement of the cutting elements by a second angle, wherein the second angle is greater than the first angle, or by means of a gear ratio, a cutting device with a drive unit, in particular a cutting device with a drive train and / or energy supply components integrated into the lever and / or handle elements, can also achieve relatively large opening angles of the cutting elements. The drive unit can also compensate for the higher forces acting on the lever elements which are caused by the gear ratio, particularly compared to a gear ratio of i ≥ 1 in conventional cutting devices.Conventional cutting devices achieve a cutting device, particularly garden shears or pruning shears, that is easy and comfortable to use for the user either through relatively long lever elements compared to the cutting elements, through slow-speed transmission mechanisms, and / or through a limitation of the opening angle of the cutting elements. In this respect, a synergistic advantage is achieved through the speed transmission, in conjunction with a particularly switchable, particularly automatically activated, drive power assistance or an assisted operation. Furthermore, with the same geometric dimensions of the cutting device, even larger opening angles of the cutting elements can be comfortably achieved compared to non-motor-assisted cutting devices. The range of application of the cutting device, particularly garden shears or pruning shears, can thus be expanded.Saws for thicker branches can sometimes be omitted. Cutting element opening angles of >45°, especially >55°, and preferably >65° can be advantageously achieved.

[0013] It is proposed that the drive unit be provided to at least support a movement of the second lever element, in particular the second handle element, relative to the first lever element, in particular the first handle element. Regarding possible embodiments, reference is made to DE102015206959A1 (see in particular Fig. 1 , 2 , 8-18), DE102016211975A1 (cf. in particular Fig. 2-5 ), DE102010016296B4 (see in particular Fig. 1-4 ), WO2008023117A2 (cf. in particular Fig. 1 , 2a, 2b, 4). This is intended to adequately disclose how a mechanism for power-assisted operation of a cutting device, in particular branch or garden shears, can be implemented. Likewise, the description of DE102010016296B4, in particular, is intended to adequately disclose how a cutting device, in particular one with a variable force threshold or a variable force proportional to the force, can be implemented.

[0014] It is proposed that the motor drive unit at least indirectly drive the gearbox and / or the connector, which is designed as a gear. This eliminates the need for additional components. The complexity and number of parts of the cutting device can be reduced.

[0015] It is proposed that the power transmission of the drive unit be achieved by means of a linear drive, a rod assembly, a gear, a cable pulley, a cable winch, a friction pulley, or the like, and / or other positive- or friction-locking rotary or linear drives or the like. For example, the drive unit can drive a cable winch that drives a cable stretched between the lever elements, in particular a cable stretched between the lever elements via a cable pulley. The cable can be housed in an opening spring for opening the lever or cutting elements. The opening spring can reset the cable.

[0016] It is proposed that the cutting device have a clutch unit for changing and / or decoupling the gear ratio i < 1 and / or decoupling the drive unit, in particular a self-switching clutch unit. A self-switching clutch unit for decoupling the drive unit or for use in a cutting device according to the invention is described, for example, in DE102015206959A1 or DE102016211975A1. Furthermore, a clutch unit for changing or decoupling the gear ratio can also be provided. This can be achieved, for example, by a device for shifting the pivot points of the connector so that a ratio i=1 and i<1 can be realized, or i<1 and i≥1. If necessary, locking positions, a slider, and / or indicators are provided for this purpose. This advantageously allows for purely manual operation, operation with different torque or opening angle ratios, etc.The range of applications of the cutting device can be expanded. A coupling unit for changing the transmission ratio can, for example, be implemented in a connector, in particular in the connector and / or on one of the lever elements or cutting elements to which the connector is connected (see, in particular, the connector). Fig. 1 ) an elongated hole is provided in which the pivot point and / or both pivot points are designed to be changeable or displaceable, in particular changeable or displaceable, lockable.

[0017] A cutting device is proposed, comprising an extension element, in particular a telescopic extension element, with at least one handle element, wherein the extension element is connected to at least one of the lever elements or forms it, in particular further comprising a control device and / or movement mechanism for controlling and / or moving a drive unit. This makes it possible to realize a pole pruner. It is possible to operate the cutting device with only one hand. Accessibility of distant branches or objects to be cut is improved. The accessibility and versatility of the cutting device can be increased in particular by a handle element, sometimes also a part of the lever element, being removable (cf. in particular Fig. 1 and 2 ).

[0018] It is proposed that the cutting device has at least one force sensor for detecting a force acting on the cutting elements and / or the lever elements and / or at least one of the handle elements and / or the connector, in particular wherein the cutting device switches on a drive unit, a closing and / or opening mechanism of the cutting device, when a defined force is exceeded.

[0019] Furthermore, a cutting device is proposed, comprising a sensor for detecting an object between the lever elements to deactivate an assisted operation and / or at least to issue a warning, particularly to a user. This can increase the safety of the cutting device.

[0020] Furthermore, a method for operating the aforementioned cutting device is proposed, wherein when a defined operator force is exceeded, the drive unit is connected to a closing mechanism of the cutting device. Drawings

[0021] The invention is described below with reference to the drawings in Fig.7 bis Fig.9 The illustrated embodiment is explained in more detail. The other drawings are not in accordance with the invention and are for illustrative purposes only. The mechanisms shown for translating i < 1 a movement of the lever elements relative to a rapid movement of the cutting elements are applicable to various cutting devices, in particular branch shears, vine shears, or garden shears, as well as pruners or pole pruners.

[0022] They show: Fig. 1 a cutting device in the form of a pruning shears; Fig. 2 the pruning shears according to Fig. 1 with a removed handle element; Fig. 3 an enlarged section of the cutting device according to Fig. 1 and 2 ; Fig. 4 the enlarged section according to Fig. 3 wherein the cutting and lever elements are open; Fig. 5 a cutting device in the form of a garden shears in one embodiment - closed; Fig. 6 the cutting device according to Fig. 5 - opened; Fig. 7 a cutting device in the form of a garden shears or at least a cutting head of a cutting device in the embodiment according to the invention - half open; Fig. 8 the cutting device according to Fig. 7 - opened; Fig. 9 an exemplary drive mechanism comprising a drive unit in connection with the cutting head according to Fig. 7 und 8 .

[0023] Fig. 1 and 2shows a cutting device 10 in the form of pruning shears 500. It has a first and a second cutting element 12, 14 that can be moved relative to one another, and a first and a second lever element 502, 504, in particular handle elements 16, 18, that can be moved relative to one another, for opening and closing the cutting elements 12, 14. According to the invention, a displacement of the lever elements 502, 504 by a first angle 506 leads to a displacement of the cutting elements 12, 14 by a second angle 508, wherein the second angle 508 is greater than the first angle 506. Thus, there is a transmission from the lever elements 502, 504 to the cutting elements 12, 14. A transmission ratio of the transmission mechanism or gear is thus i < 1. In the present example, the first angle 506 is approximately 40° and the second angle 508 is approximately 50°. When the lever elements 502, 504 are opened or closed by an opening or closing angle 506, the opening or closing angle isClosing angle 508 of the cutting elements 12, 14 is relatively larger than the opening angle 506 of the lever elements 502, 504. The torque to be applied to the lever elements 502, 504 or the force required to sever an object to be cut is thus increased compared to conventional cutting devices with the same dimensions but a transmission ratio of i≥1. Advantageously, this makes it possible to reduce the opening angle of the lever elements 502, 504 or the handle elements 16, 18 compared to the opening angle of the cutting elements 12, 14, in particular in order to improve accessibility to branches inside trees, hedges or other objects to be cut. In these cases, freedom of movement is often limited and the sometimes long lever or handle elements 16, 18, 502, 504 can only be opened to a limited extent. However, with the device according to the invention, despite the limited opening angle 506 of the lever or handle elements 16, 18,Handle elements 16, 18, 502, 504 are used to cut a relatively large branch or object to be cut, or to achieve a relatively large opening angle 508 of the cutting elements 12, 14. Conventional cutting devices, for example loppers, on the other hand, have either a direct transmission (i = 1) or a slow transmission (i > 1), so that the force required to close the lever or handle elements 16, 18, 502, 504 is as low as possible - with the disadvantage that this limits accessibility in confined spaces, so that sometimes thicker objects to be cut in particular cannot be positioned between the cutting elements 12, 14.According to the invention, angular relationships are possible in which the second opening angle 508 is greater than the first opening angle 506, in particular wherein the second opening angle 508 is approximately one and a half to three times greater, preferably twice as large, than the first opening angle 506. The second opening angle 508 is in particular >45°, preferably >55°, particularly preferably >65°.

[0024] According to the Fig. 1 bis 4 The transmission into high speed is made possible, for example, by a force transmission device, in particular a connector 510, 552. This is provided for transmitting a movement of the second lever element 504 relative to the first lever element 502 to the second cutting element 14 relative to the first cutting element 12. The transmission ratio of the connector 510 or of the gear is i<1. To generate the transmission ratio i<1, the lever arm length 520 with which the connector 510, in particular a pivot point 512 of the connector 510, is positioned relative to a pivot point 518 of the lever elements 502, 504, is greater than the lever arm length 522 with which the connector 510, in particular a further pivot point 514 of the connector 510, is positioned relative to a pivot point 516 of the cutting elements 12, 14. The pivot points 512, 514 of the connector 510 are typically located in opposite end regions of the connector 510.It is conceivable, for example, that the pivot points 512, 514 are adjustable, for example, in elongated holes with locking positions or the like. This would enable different transmission ratios; in particular, a user could change the opening angle of the lever elements 502, 504 depending on the accessibility of an object to be cut.

[0025] Fig. 1 , 2 also reveal an example of a cable pull 524.

[0026] The cable pull 524 is clamped between deflection devices 526, 528, in particular deflection pulleys. A deflection device is arranged on each of the first and second lever elements 502, 504. The cable pull 524 can also be guided back several times, for example around additional deflection pulleys, thereby increasing the transmission ratio. The cable pull 524 is driven by a cable winch (not shown) or a linear drive, which is driven by a drive unit, in particular a pneumatic, hydraulic, electric motor drive unit or other drive device or the like. As an exemplary mechanism, reference is made here to the Fig. 3 - 5 Reference is made to DE 102016211975A1. A drive unit 20 (motor) housed in a handle element 16 drives a cable winch 32 via a gear unit 38 and a clutch unit 22, which displaces the other handle element 18 via a drive force transmission element 340 in the form of a cable 34.

[0027] Such drivetrain components are in the Figur 1 and 2housed in the lever element and / or grip element 18, 504. The grip element(s) 16, 18 each have one or more (hand) force sensors 530. The (hand) force sensor(s) 530 detects a force exerted on the grip element 16, 18. Depending on the force and / or a force threshold, at least one assistance mode is activated. The assistance mode can be activated proportionally to the force or depending on a force threshold. The sensitivity of the sensor or the amount of force assistance is advantageously adjustable, for example via an adjustment wheel, slider, switch, potentiometer, or the like. Likewise, the force assistance, in particular the force assistance proportional to the detected force, can be adjustable in discrete steps or continuously. An accumulator 534 is also arranged on the grip element 18.A stop sensor 532 can be arranged between the handle elements 16, 18 (or also between the lever elements 502, 504) to cause the drive unit to shut down when the handle elements 16, 18 have reached their end position. From the comparison of . Fig. 1 and 2 , it is also evident that the handle element 16 is designed to be removable. This allows the pruning shears 500 to be converted into a pole pruner 536, or a pruning shears 500 with only one arm or handle element 18. The pole pruner 536 can be activated by actuating the handle element 18 or compressing the hand force sensor 530. An opening spring (not shown), which can act between the lever elements 502 and 504, can open the cutting elements 12, 14, and the cable pull 524 can close them again.

[0028] An alternative embodiment of the cutting device 10 in the form of a garden shears 550 is shown in Fig. 5 und 6 shown - in a closed and in an open position of the cutting elements 12, 14, - wherein the cutting device 10 is provided in the open position for receiving a cutting material (not shown). The cutting device 10 or garden shears 550 has a first and a second cutting element 12, 14 that can be moved relative to one another and a first and a second lever element 502, 504, in particular handle element 16, 18, that can be moved relative to one another for opening and closing the cutting elements 12, 14. The cutting elements 12, 14 and the lever elements 502, 504 have a common pivot point 505. A displacement of the lever elements 502, 504 by a first angle 506 leads to a displacement of the cutting elements 12, 14 by a second angle 508, wherein the second angle 508 is greater than the first angle 506.In the present example, the first displacement angle 506 (of the lever elements 502, 504) is approximately 20°, while the corresponding second displacement angle 508 (of the cutting elements 12, 14) is approximately 50°. Here, too, by changing the lever lengths or other components involved in generating the transmission, other transmission ratios from the lever elements 502, 504 to the cutting elements 12, 14 are possible (i<1). Just as in . Fig. 3 und 4 Here, too, a force transmission device, in particular a connector 552, is provided for high-speed transmission. This is intended to transmit a movement of the second lever arm 504 relative to the first lever element 502 to the second cutting element 14 relative to the first cutting element 12. To generate the transmission ratio i<1, the connector 552 is designed as a type of rocker. A first end 554 of the connector 552 is rotatably connected to the first lever element 502, and a second end 556 of the connector 552 is rotatably connected to the second cutting element 14, in particular to a lever arm 557 of the second cutting element 14. The lever arm 557 extends to the opposite side of the cutting element 14 relative to the pivot point 505 of the cutting elements 12, 14. In a central region 558 of the connector 552, it is rotatably connected to the second lever element 504.Here, too, the lever arm lengths 566, 568 can differ, in particular in the form that the lever arm length 566 between the first lever element 502 and the second lever element 504 is greater than the lever arm length 568 between the second lever element 504 and the second cutting element 14. In the present example, this lever arm length ratio is approximately 1.65 and can of course also be selected differently in terms of design. To enable tilting of the connector 552 about the central region 558 or the rotary receptacle on the second lever element 504, the two ends 554, 556 of the connector 552 are rotatably and longitudinally displaceably received in elongated holes 564 in the first lever element 502 and the second cutting element 14, respectively. To avoid component collisions, the end 554 of the connector 552 and the middle region 558 or the corresponding rotary receptacles are received on spacers 560, 562, or via spacers 560, 562 with the first orsecond lever element 502, 504. In the present example, the spacers 560, 562 are formed integrally with the lever elements 502, 504. Opening or closing the lever elements 502, 504 about the pivot point 505 by an angle of 20° leads, for example, to a displacement or rotation of the connector 552 by approximately 55° around the central region 558 or the rotary receptacle there. This, in turn, causes a displacement of the second cutting element 14 relative to the first cutting element 12 by approximately 55°.

[0029] Depending on the lever ratios and geometric arrangement, other gear ratios to slow i<1 can of course also be realized with this principle.

[0030] According to the invention, the cutting device 10 in the form of a garden shears 601 is the Fig. 7 und 8 The structure has a certain similarity to the structure of Fig. 5 und 6 , which is why identical parts or at least functionally similar components are not explained again, but are simply provided with identical reference numerals. A gear 602 acts as the connector 600 here. The gear 602 is rotatably received on the second lever element 504, or the spacer 562 of the second lever element 504. The gear 602 is supported on the one hand on a toothed section 604 of the first lever element 502 or a toothed section 604 of the spacer 560 of the first lever element 502 and is supported on the other hand on a toothed section 606 of the second cutting element 14, or a toothed section 606 of the lever arm 557 of the second cutting element 14. The toothed sections 604, 606 are designed as part-circular sections which have a pitch circle diameter which is approximately twice the minimum or maximum radial distance 620, 622 of the pivot point 505 of the lever orCutting elements 12, 14, 502, 504 correspond to the pitch circle 624 of the gear 602. Visualization points 608, 610, 612, 614 are attached to the gear 602 and the toothed sections 604, 606 for identification purposes, which indicate the position or rotation of the gear 602 relative to the toothed sections 604, 606 upon displacement of the lever elements 502, 504 or the handle elements 16, 18 by a displacement angle (. Fig. 7 vs. Fig. 8 ) to each other. In Fig. 7 the handle or lever element 16, 18, 502, 504 have an opening angle 616 of 22°, in Fig. 8 of 38°. In contrast, the cutting elements 12, 14 in the Fig. 7 an opening angle 618 of 20° and the Fig. 8 of approximately 55°. This corresponds to an opening angle difference or a transmission ratio of i=16° / 35°, or approximately i~0.45. By adjusting the arrangement accordingly, the transmission ratio i<1 can of course also be changed here.

[0031] Fig. 9 shows an example of an integration of the garden shears 601 into a motor-assisted cutting device 10, 650. This cutting device is based on the cutting device of DE 102016211975A1, see in particular Fig. 3 - 5 It accordingly has a drive unit 20 (motor) housed in a handle element 16. This drives a cable winch 32 via a gear unit 38 and a particularly self-switching clutch unit 22, which displaces the other handle element 18 via a drive force transmission element 340 in the form of a cable 34. The drive force transmission element 340 is guided in an opening spring 50. An accumulator 54 is also housed in the second handle element 18. The drive train components (motor, gear, etc.) as well as the accumulator thicken the handle elements 16, 18 and thereby reduce the opening angle between the closed and open cutting device 10. Therefore, the cutting device according to Fig. 8for integration. The first lever element 502 is anchored in the first handle 16, and the second lever element 504 is connected to the second handle element 18 via the force transmission element 800 or the lever 80. The cutting device 650 enables power-assisted operation. For details on its implementation, please refer to the figures and figure description of DE 102016211975A1.

Claims

1. Cutting device (10), in particular garden cutting device, having a first and a second cutting element (12, 14) that are movable relative to one another, having a first and a second lever element (502, 504), in particular handle element (16, 18), that are movable relative to one another and serve for opening and closing the cutting elements (12, 14), wherein closing of the lever elements (502, 504), in particular handle elements (16, 18), causes closing of the cutting elements (12, 14), wherein displacement of the lever elements (502, 504) through a first angle (506) causes displacement of the cutting elements (12, 14) through a second angle (508), wherein the second angle (508) is one and a half to three times larger than, preferably twice as large as, the first angle (506), further having a gear mechanism and / or a connector (510, 552, 600) which brings about a transmission ratio i < 1 of a movement of the lever elements (502, 504) relative to a movement of the cutting elements (12, 14), in particular a speed-increasing transmission ratio, characterized in that the connector (600) is a toothed wheel (602), wherein the toothed wheel (602) is held rotatably on the second lever element (504) and is supported against a toothed portion (604) of the first lever element (502) at one side and against a toothed portion (606) of the second cutting element (14) at the other side.

2. Cutting device (10) at least according to Claim 1, having an in particular motor-driven drive unit (20) which, in at least one operating state, is intended at least to assist a movement of the second cutting element (14) relative to the first cutting element (12).

3. Cutting device (10) at least according to Claim 2, characterized in that the drive unit (20) is intended at least to assist a movement of the second lever element (504), in particular second handle element (18), relative to the first lever element (502), in particular first handle element (16).

4. Cutting device (10) at least according to Claim 2 or 3, characterized in that the motor-driven drive unit (20) at least indirectly drives the gear mechanism and / or the connector (600) in the form of a toothed gear (602).

5. Cutting device (10) at least according to Claim 2, characterized in that the force transmission of the drive unit (20) is realized by means of a linear drive, a linkage, a gear mechanism, a cable pull, a cable winch, a friction roller and / or other form-fitting or frictionally engaging rotary or linear drives or the like.

6. Cutting device (10) at least according to one of the preceding claims, having a coupling unit (22) for changing and / or ceasing to apply the transmission ratio i < 1 and / or decoupling the drive unit (20), in particular a self-switching coupling unit (22).

7. Cutting device (10) at least according to one of the preceding claims, having an extension element (503), in particular a telescopic extension element (503), with at least one handle element (18), wherein the extension element (503) is connected at least to one of the lever elements (504) or forms it, in particular further having a control device and / or movement mimicking means for controlling and / or moving the drive unit (20) at least according to Claim 2.

8. Cutting device according to one of the preceding claims, characterized by at least one force sensor (40, 530) for sensing a force acting on the cutting elements (12, 14) and / or the lever elements (502, 504) and / or at least one of the handle elements (16, 18) and / or the connector (510), in particular wherein, if a defined force is exceeded, the cutting device (10) at least connects a drive unit (20), in particular the drive unit (20) according to Claim 2, to a closing and / or opening mechanism (523) of the cutting device (10).

9. Cutting device (10) according to one of the preceding claims, having a sensor for detecting an object between the lever elements (502, 504) for switching off assistance operation, in particular of the drive unit (20) according to Claim 2, and / or at least for outputting a warning.

10. Method for operating a cutting device (10a; 10b; 10c; 10d) at least according to Claim 8, characterized in that, if a defined operator force is exceeded, the drive unit (20) is connected to a closing mechanism (523) of the cutting device (10).

11. Method for operating a cutting device (10) at least according to Claim 9, characterized in that, if an object is detected between the lever elements (502, 504), the assistance operation is switched off, in particular by the drive unit (20) according to Claim 2 being switched off, and / or at least a warning is output.