DE202021003740U1 - Cutting head for mowers and mowers - Google Patents

Abstract

Cutting head for mowing devices (2), the cutting head (20) being designed to be arranged on a shaft (18) of the mowing device (2), the cutting head (20) having a blade fastening disk (28) on which a plurality of blades (34 ) can be arranged for cutting crop (4), the blades (34) having at least one cutting edge (42), the blade attachment disc (28) having an outer peripheral contour (31) with radially projecting projections (30), the blade attachment disc (28) a plurality of first receptacles (32) are arranged for fastening the blades (34), the projections (30) having a greater radial extent (rV) than the at least one maximum radial extent (rS) of the at least one cutting edge ( 42).

Description

A cutting head for mowing devices and a mowing device are described here.

Cutting heads for mowers and mowers of the type mentioned are known in the prior art. Such mowing devices are mainly used for mowing lawns, which often consists predominantly of different types of grass.

In general, various types of mowing devices are known, including lawn mowers, lawn edgers or brush cutters. Lawn mowers can in turn have different designs, for example automatic, self-propelled lawn mowers (lawn mower robots) or user-operated lawn mowers such as classic push mowers or, for large areas, ride-on mowers and the like.

In addition, with the known mowing devices, different mowing principles are known, e.g. cylinder mowers, sickle mowers, line cutters, etc. Sickle mowers have one-piece or multi-piece solid sickles and, particularly in the case of robotic lawn mowers, blade arrangements with a cutting disc with interchangeable blades in most known devices.

From the EP 0808 096 B1 is known an automatic lawn mower comprising an electric motor, preferably powered by a rechargeable battery, and equipped with a cutting head having a drive shaft connected to a cutting disc which is perpendicular to the shaft, the cutting disc at its edge comprises at least one blade, and wherein the cutting head also comprises a lower plate parallel to and underlying the cutting disk, the lower plate being mounted in a freely rotatable arrangement by bearing means on the shaft such that the lower plate normally rotating only slightly or not at all, but capable of rotating sufficiently fast to centrifugally eject small particles caught between the cutting disk and the lower platen.

Disadvantages of the known solutions are primarily related to their safety in operation. The mostly rapidly rotating blades pose a significant risk of injury to people and animals, especially in the case of autonomously driving robotic lawn mowers. In order to reduce these risks, it is known to provide small crescent arrangements compared to the dimensions of the robotic lawn mower, so that a wide edge remains uncut. Furthermore, various types of sensor arrangements are known to prevent contact with humans and animals.

Another disadvantage is that a good cutting result depends on a sharp cutting edge, especially with rotary mowers. However, since the cutting edges on the sickles are subject to heavy wear and frequently come into contact with stones, they become blunt relatively quickly. As a result, the lawn is no longer cut properly, but rather plucked or torn, which means that the grass plants are injured and cannot grow optimally. The cutting pattern can also be uneven, which makes a corresponding lawn appear unkempt.

The task therefore arises of further developing cutting heads for mowing devices and mowing devices of the type mentioned at the outset in such a way that they offer an increased degree of safety and a better cutting pattern in the long term.

The object is achieved by a cutting head for mowing devices according to claim 1 and a mowing device according to the independent claim 11. Further configurations and developments are the subject matter of the dependent claims.

A cutting head for mowing devices is described below, the cutting head being designed to be arranged on a shaft of the mowing device, the cutting head having a blade fastening disc on which a plurality of blades for cutting mowing material can be arranged, the blades having at least one cutting edge, wherein the blade attachment disk has an outer peripheral contour with radially protruding projections, a plurality of first receptacles for attachment of the blades being arranged on the blade attachment disk, the projections having a greater radial extent than the at least one maximum radial extent of the at least one cutting edge.

The shaft of the mowing device is driven, e.g. by a motor. The motor can be an electric motor powered by a rechargeable battery. Torque and power of the engine are important factors for the cutting result of the mower.

One or more blades are arranged on the blade mounting disk. The blades can be detachably and/or interchangeably attached, for example by means of screws. The blade and blade mounting disc are mostly perpendicular to the axis of rotation of the cutting head and have a small axial offset Set on, since the blades are arranged on a radially oriented surface of the blade mounting disk.

The blade mounting disc is designed to have a center of gravity coinciding with an axis of rotation of the cutting head to avoid imbalance in operation. This can be achieved, among other things, by substantially evenly circumferentially distributing physical features that are multiple, e.g., multiple blades that are equally spaced.

Due to the fact that the blade fastening disc has radially protruding projections, which protrude radially further than the at least one cutting edge of a blade, a living being first comes into contact with the cutting head due to the high rotational speeds, as a rule, first with a projection of the blade fastening disc, which usually already leads to this leads to the creature withdrawing from the danger zone before the at least one cutting edge touches the creature with a high moment, which can cause dangerous injuries. In addition, the projections usually prevent the living being from advancing further into an area in which the at least one cutting edge could cause injuries.

Furthermore, the projections can largely prevent the at least one cutting edge from coming into contact with a hard object such as a stone and being damaged as a result. As a result, the at least one cutting edge remains sharp for longer, which leads to a better lawn cut over a longer period of time than with conventional solutions.

In a first further development, it can be provided that the blades can be arranged pivotably on the blade attachment disk, with the respective pivot axes of the blades being aligned parallel to an axis of rotation of the cutting head.

On the one hand, this makes it possible for a blade to turn away when it comes into contact with a hard object, which increases the durability of the blade. On the other hand, this enables better cleaning of the blade, in particular the cutting edge, of lawn clippings, since such clippings are stripped off when the blade moves relative to a projection of the blade fastening disk.

In a further refinement, it can be provided that a shearing disk is arranged coaxially at a distance from the blade fastening disk, the blades being arranged between the blade fastening disk and the shearing disk, the shearing disk together with the blades effecting a shearing function on the crop.

A scissor cut on the grass is usually cleaner than a free blade cut, which is why cylinder mowers are often used in the prior art for the care of high-quality lawns, e.g. in ornamental gardens or on golf courses. With the help of the shearing disc, a scissor cut is also possible with a mowing device, which also follows a sickle principle.

For this purpose, there can be a predetermined axial distance between the shearing disk and at least one cutting edge of a blade, which can be in the range from 2 mm to 5 mm, in particular 3 mm to 4 mm. The exact distance can depend on the purpose of use, for example gardening or agriculture, on the type of lawn or grass to be cut and on the remaining dimensions of the cutting head. For gardens, distances of 3 mm have proven themselves.

In a further refinement, it can be provided that the shearing disk has shearing edges which at least partially protrude radially beyond the outer peripheral contour of the blade fastening disk.

The shearing edges can be designed in such a way that a shearing effect in connection with the at least one cutting edge is optimized. In particular, the shearing edges can be straight and have sharp edges.

According to a further development, the shearing edges can stand back radially with respect to the projections of the blade fastening disk, in order to avoid any risk of injury.

In a further further development it can be provided that the blade fastening disk is arranged on a receptacle.

This makes it possible to use the same blade fastening discs on different mounts for different mowing devices, which increases the number of possible identical parts from one manufacturer. In addition, the ease of maintenance of the cutting head increases at the same time if it can be dismantled. Furthermore, this enables the use of different materials for the holder and blade fastening disk.

In a further further development it can be provided that the blade fastening disk and the shearing disk are arranged on a receptacle, the receptacle having a axial distance between blade mounting disc and shear disc determined.

This makes it possible to use the same blade attachment discs and shear discs on different mounts for different mowing devices, which increases the number of possible common parts from one manufacturer. Furthermore, it is possible to combine different designs of blade attachment disks and shearing disks with one another on the same mount, which means that different applications can be served. In addition, the ease of maintenance of the cutting head increases at the same time if it can be dismantled. Furthermore, this enables the use of different materials for the holder, shearing disk and blade fastening disk.

In a further refinement, it can be provided that a ground spacer is rotatably arranged on the cutting head, which is designed to be placed on a crop surface.

The ground spacer may be freely rotatable, for example through the use of ball or roller bearings, so that it can also remain substantially stationary without interfering with the rotation of the remaining components of the cutting head.

In a further further development it can be provided that the blade fastening disc and/or the shearing disc are made of steel, in particular spring steel.

These materials are very robust and durable, which increases the operational reliability and durability of a corresponding cutting head. In general, material thicknesses between 0.5 mm and 1 mm have proven themselves.

In a further refinement, provision can be made for second receptacles to be arranged on the projections of the blade fastening disk, with the second receptacles having a different radial distance from the axis of rotation of the cutting head than the first receptacles.

This allows different cutting radii to be achieved, allowing the same blade mounting disc to be used for different mower types. This means that a manufacturer's proportion of identical parts can be increased.

In a further further development, it can be provided that stops for limiting a rotation or pivoting angle of the blades can be arranged or are arranged on the blade fastening disk or on the shearing disk.

Limit stops require a blade to be guided and can thus enable a better lawn cut with hard-stemmed types of grass. Also, a better lawn cut can be achieved on wet lawns because the likelihood of a blade sticking in a non-cutting position is reduced.

A first independent subject relates to a mowing device with at least one cutting head of the type described above.

Such a mowing device can in particular be a lawnmower, in particular a robotic lawnmower, a lawn edge cutter or a brush cutter.

• 1 eine Seitenansicht eines Rasenmähroboters mit einem Schneidkopf;
• 2 der Schneidkopf aus 1 in einer perspektivischen Ansicht von oben;
• 3 der Schneidkopf aus 1 in einer perspektivischen Ansicht von unten;
• 4 der Schneidkopf aus 1 in einer Seitenansicht;
• 5 der Schneidkopf aus 1 in einer Schnittansicht gemäß der Schnittlinie A-A aus 3;
• 6 eine Klingenbefestigungsscheibe des Schneidkopfs aus 1 in einer perspektivischen Ansicht;
• 7 eine Aufnahme des Schneidkopfs aus 1 in einer perspektivischen Ansicht;
• 8 ein Bodenabstandhalter des Schneidkopfs aus 1 in einer perspektivischen Ansicht;
• 9 eine Klinge des Schneidkopfs aus 1 in einer perspektivischen Ansicht;
• 10 eine erste Ausführungsform einer Abscherscheibe des Schneidkopfs aus 1 in einer perspektivischen Ansicht;
• 11 eine zweite Ausführungsform einer Abscherscheibe des Schneidkopfs aus 1 in einer perspektivischen Ansicht, sowie
• 12 eine Adapterscheibe des Schneidkopfs aus 1 in einer perspektivischen Ansicht.

Further features and details emerge from the following description, in which at least one exemplary embodiment is described in detail—if appropriate with reference to the drawing. Described and/or illustrated features form the subject matter alone or in any meaningful combination, possibly also independently of the claims, and in particular can also be the subject matter of one or more separate applications. Identical, similar and/or functionally identical parts are provided with the same reference symbols. Schematically show:

• 1 a side view of a robot lawn mower with a cutting head;
• 2 the cutting head off 1 in a perspective view from above;
• 3 the cutting head off 1 in a perspective view from below;
• 4 the cutting head off 1 in a side view;
• 5 the cutting head off 1 in a sectional view according to section line AA 3 ;
• 6 a blade mounting washer of the cutting head 1 in a perspective view;
• 7 a recording of the cutting head 1 in a perspective view;
• 8th a floor spacer of the cutting head 1 in a perspective view;
• 9 a blade of the cutting head 1 in a perspective view;
• 10 a first embodiment of a shearing disk of the cutting head 1 in a perspective view;
• 11 a second embodiment of a shearing disc of the cutting head 1 in a perspective view, as well
• 12 an adapter disk of the cutting head 1 in a perspective view.

Identical and equivalent components can be provided with the same reference symbols in the following descriptions of exemplary embodiments. Furthermore, components or features that occur more than once with the same functions are only provided with reference symbols once in each case in order to improve legibility.

1 shows a side view of a robot lawn mower 2 . The robot lawn mower 2 is shown mowing a lawn 4 .

The robotic lawn mower 2 has a housing 6 on which driven wheels 8 and steerable wheels 10 are provided, with the aid of which the robotic lawn mower 2 can be controlled. Depending on the embodiment, three-wheel or four-wheel models can be implemented. In the case of three-wheel variants, there is usually only one steerable wheel.

Inside the housing 6, a controller 12, an accumulator 14 and an electric motor 16 are provided. The controller 12 acts on the electric motor 16 and the steerable wheels 10 and the electric motor 16. In some embodiments, the electric motor 16 can also be used to drive the driven wheels, or these are driven separately. The controller 12 can be connected to a large number of sensors that are necessary for the control, for example for detecting the relative or absolute position of the lawnmowing robot 2.

The electric motor 16 drives a drive shaft 18 on which a cutting head 20 is arranged. The cutting head 20 is used to cut the lawn 4 and is explained in more detail in the following figures.

A shaft axis 22 of the drive shaft 18 is at an angle α relative to a surface normal 24, which is defined by a contact plane of the wheels 8, 10. As a result, a part of the cutting head 20 located at the front in the direction of travel x is higher than a rear part. The distance from the rear part of the cutting head 20 to the ground thereby defines a height of the cut lawn 4'.

2 12 shows a three-dimensional view of the cutting head 20 from above.

The cutting head 20 consists of several components fixed to one another. The core of the cutting head 20 forms a receptacle 26 to which a blade attachment disk 28 is fixed by means of screws 29. The receptacle 26 is made of plastic and is shown in detail in 7 shown.

The blade mounting disk 28 has a total of 8 radially protruding projections 30 . A peripheral contour 31 between the projections 30 is optimized in terms of stability and weight. Centrally along a respective projection 30, ie on an axis of symmetry of a projection 30, first receptacles 32 are arranged in each case, on which blades 34 are rotatably fixed by means of screws 36. Second receptacles 38 are provided radially further outwards, on which the blades 34 can also be fixed in other configurations, e.g. in larger robotic lawn mowers. The projections 30 are rounded at their radially protruding ends in order to minimize the risk of injury when they come into contact with living beings. The projections also run towards each other at their radially projecting ends in order to save weight.

The blades 34, in connection with the detail 9 are explained here are shown freely giftable. The possible pivoting angles of the blades 34 can be limited in certain configurations with stops, for example screws, in bores 40 which are arranged adjacent to the first receptacles 32 and the second receptacles 38, in order, for example, to achieve an improved cutting effect in hard grass reach. The blades 34 have cutting edges 42 on both longitudinal sides, which in the present case extend to a radially protruding end of the blades 34 .

The configuration of the projections 30 of the blade mounting disk 28, the first receptacle 32 and the second receptacle 38 in connection with the blades 34 is selected such that a radial extent rV of the projections 30 is greater than a maximum radial extent rS of the cutting edges 42 of the blades 34 , measured from the shaft axis 22, which also represents an axis of rotation of the cutting head 20. This ensures that when a living being comes into contact with the cutting head 20, one of the blunt and rounded-end protrusions 30 is first touched and not one of the cutting edges 42. As a rule, contact with the protrusions 30 is sufficient to trigger a withdrawal reflex, so that the living being is not harmed.

Below the blade mounting washer 28 is a shear washer 44 which is also secured to the mount 26 . The shear disk 44 is made of metal. The same screws 29 are used for fixing as in 3 becomes visible. The shearing disk 44, which is 10 as shown in the configuration shown, is spaced from the blades 34 to improve grass shearing action. Shearing edges 46 are provided for shearing, at which blades of grass are sheared. The shearing edges 46 are located between the projections 30 in plan view, which promotes the self-cleaning of the cutting head 20 and covers the blades 34 from below.

The cutting head 20 can be used for various mowing devices such as those in 1 robot lawn mower 2 shown, for brush cutters or lawn edge cutters are used. In addition, it can be configured differently depending on the specific application, for example by using a shearing disk with a different contour, such as the one shown in 11 is shown. Furthermore, it is possible to equip the blade fastening disc with a different number of blades, for example four blades. Other possible variations relate to the number of protrusions, which in other embodiments can be reduced to 3, 4 or 6, for example.

3 shows a three-dimensional view of the cutting head 20 from below.

The geometry of the shearing disk 44 is designed in such a way that free access to the screws 36 is ensured in order to be able to easily exchange the blades 34 . In the present case, the screws 36 are pan-head screws, since they exert less friction on the blades 34 and do not impede their free rotation.

The screws 29 are used to set the shear plate 44 and are secured with self-locking nuts 48.

A plastic floor spacer 50 is attached to the (in 3 not visible) Recording 26 fixed. The ball bearings 52 allow the ground spacer 50 to rotate freely relative to the remainder of the cutter head 20 which is driven by the electric motor 16. The ground spacer 50, which is not necessary in some configurations, prevents the blades 34 from cutting into the ground on an uneven turf surface and thus protects the blades 34.

4 shows a side view of the cutting head 20.

The blade fastening disc 28 and the shearing disc 44 have a clear distance d from one another, which ensures a good shearing effect on the material to be cut in conjunction with the blades 34 .

5 FIG. 12 shows a cross section through the cutting head 20 along section line AA 3 .

An adapter 56 is provided below the receptacle 26, which has a suitable connection contour 58 for fixing to different robotic lawn mowers, e.g. a receptacle for the drive shaft 18. The adapter 56 has an internal thread 60 for fixing the screw 54.

6 shows a perspective view of the blade mounting disk 28.

In the present case, the blade fastening disc 28 is made from approx. 1 mm thick spring steel using a laser cutting process, but it can also be stamped.

The blade attachment disk 28 here has four inwardly projecting tabs 62 with four attachment holes 64 for attachment to the receptacle 26 . The screws 29 are inserted through the fastening holes 64 . The use of lugs 62 saves material on the one hand and enables better tolerance compensation for the receptacle 26 on the other hand, so that stresses between the blade fastening disc 28 and the receptacle 26 can be avoided and assembly is facilitated.

7 shows the receptacle 26 in a perspective view.

Recording 26 is, as in, among other things, 5 is visible, structured in several stages. A core 66 of the receptacle 26 serves as the upper closing area of the cutting head 20 towards the robot lawn mower 2 . Depending on the specific configuration, the receptacle 26 can be fixed to the drive shaft 18 directly and/or by means of the adapter 56 . A hole 68 is provided for this purpose, into which, as in 5 it can be seen that the adapter 56 protrudes. Mounting holes 70 can be used to screw mount 26 to the drive shaft.

The next stage 72 has a larger diameter than the core 66. The stage 72 merges into a mounting flange 74, on which a bearing surface 76 is provided at the top, on which the blade mounting disc 28 is positioned with its tabs 62 and fastened using four mounting holes 78 will.

In the present illustration, the fastening flange 74 has a contact surface 80 for positioning and fixing the shearing disk 44 on the underside, which is concealed. The mounting flange 74 has a thickness d that determines the clearance between the blade mounting disk 28 and the shearing disk 44 .

8th shows a perspective view of the floor spacer 50 from below.

The floor spacer made of plastic, for example by injection moulding, has a step 82 in order to accommodate the two ball bearings 52 . The ball bearings 52 are pressed into a receptacle 84 of the floor spacer 50 . The floor spacer 50, which is designed as a consumable item, has a consumable landing surface 86.

9 shows a blade 34 in a perspective view.

The blade 34 can be a commercially available blade for robotic lawn mowers and can be stamped from rolled steel.

The blade 34 has two cutting edges 42 arranged opposite one another, which are each ground on one side and extend to a free end 87 . A mounting hole 88 allows the blade 34 to be fixed to the blade mounting disk 28 with a screw 36 .

Opposite the free end 87, the blade 34 is designed to taper on both sides, among other things in order to prevent a tendency to cant on the blade attachment disk 28.

10 shows a first variant of the shearing disk 44, as shown in FIGS 2 , 3 , 4 and 5 is shown.

The shear disk 44 is made of spring steel 0.5 mm thick.

The shear disk 44 has shearing edges 46 oriented at an obtuse angle to one another, which release inwardly tapering recesses 90 and thereby access to the screws 36 .

The shear washer 44 is secured to the mount 26 by four mounting holes 92 . Attachment holes 64 of the blade attachment disc 28, attachment holes 78 of the socket 26 and attachment holes 92 of the shear disc 44 are each coaxial with the correct alignment of the blade attachment plate 28, socket 26 and shear disc 44 with one another and form a common through-hole for the passage of the screws 29.

11 shows a second variant of a shearing disk 44', which can be used, for example, in lawn edge cutters and brush cutters.

The shear disk 44 is made of spring steel 0.5 mm thick.

A peripheral contour 94 is of essentially circular design, as a result of which a lower shearing effect is achieved, which can prevent the cutting head 20 from getting stuck, for example, in tall undergrowth.

Instead of cutouts, eight grooves 96 are provided on the shear disk 44', which allow access to the screws 36.

The shear washer 44' is secured to the mount 26 by four mounting holes 92. As shown in FIG. Attachment holes 64 of the blade attachment disc 28, attachment holes 78 of the socket 26 and attachment holes 92 of the shear disc 44 are each coaxial with the correct alignment of the blade attachment plate 28, socket 26 and shear disc 44 with one another and form a common through-hole for the passage of the screws 29.

The choice of the right shearing disk contour can therefore depend on the respective concrete application.

12 shows a perspective view of the adapter 56.

The adapter 56 is made of metal and can be produced, for example, by casting or by machining, for example by turning. The adapter 56 has mounting holes 98 concentric with the mounting holes 70 of the mount 26 in the correct orientation relative to the mount 26 .

Although the subject matter has been illustrated and explained in more detail by exemplary embodiments, the invention is not restricted by the disclosed examples and other variations can be derived therefrom by a person skilled in the art. It is therefore clear that a large number of possible variations exist. It is also understood that exemplary embodiments are only examples and should not be construed as limiting in any way the scope, applications, or configuration of the invention. Rather, the preceding description and the description of the figures enables the person skilled in the art to concretely implement the exemplary embodiments, whereby the person skilled in the art, knowing the disclosed inventive concept, can make a variety of changes, for example with regard to the function or the arrangement of individual elements mentioned in an exemplary embodiment, without departing from the scope of protection defined by the claims and their legal equivalents, such as a further explanation in the description, is defined.

Reference List

2

robot lawn mower

4

lawn

4'

cut lawn

6

housing

8th

driven wheel

10

steerable wheel

12

steering

14

accumulator

16

electric motor

18

drive shaft

20

cutting head

22

shaft axis

24

surface normal

26

admission

28

blade mounting washer

29

screw

30

head Start

31

perimeter contour

32

first shot

34

blade

36

screw

38

second recording

40

drilling

42

cutting edge

44

shear disc

44'

shear disc

46

shearing edge

48

mother

50

floor spacers

52

ball-bearing

54

screw

56

adapter

58

connection contour

60

inner thread

62

tab

64

mounting hole

66

core

68

hole

70

mounting hole

72

step

74

mounting flange

76

contact surface

78

mounting hole

80

contact surface

82

step

84

admission

86

contact surface

87

free end

88

mounting hole

90

recess

92

mounting hole

94

perimeter contour

96

groove

98

mounting hole

a

angle of attack

i.e

distance

rV

radial extension protrusion

rS

radial extension cutting edge

x

driving direction

QUOTES INCLUDED IN DESCRIPTION

This list of the documents cited by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent Literature Cited

• EP 0808096 B1 [0005]

Claims (11)

Cutting head for mowing devices (2), the cutting head (20) being designed to be arranged on a shaft (18) of the mowing device (2), the cutting head (20) having a blade fastening disk (28) on which a plurality of blades (34 ) can be arranged for cutting crop (4), the blades (34) having at least one cutting edge (42), the blade attachment disc (28) having an outer peripheral contour (31) with radially projecting projections (30), the blade attachment disc (28) a plurality of first receptacles (32) are arranged for fastening the blades (34), the projections (30) having a greater radial extent (rV) than the at least one maximum radial extent (rS) of the at least one cutting edge ( 42). cutting head after claim 1 wherein the blades (34) are pivotally mountable on the blade mounting disc (28) with the respective pivot axes () of the blades (34) being aligned parallel to an axis of rotation (22) of the cutting head (20). cutting head after claim 1 or 2 , wherein a shearing disc (44, 44') is arranged coaxially at a distance from the blade fastening disc (28), the blades (34) being arranged between the blade fastening disc (28) and the shearing disc (44, 44'), the shearing disc (44, 44 ') together with the blades (34) causes a shearing function on the crop (4). cutting head after claim 3 wherein the shearing disk (44) has shearing edges (46) which at least partially project radially beyond the outer peripheral contour (31) of the blade-mounting disk (28). A cutting head according to any one of the preceding claims, wherein the blade mounting washer (28) is located on a socket (26). Cutting head after one of claims 3 or 4 , the blade attachment disc (28) and the shearing disc (44, 44') being arranged on a receptacle (26), the receptacle (26) determining an axial distance (d) between the blade attachment disc (28) and the shearing disc (44, 44'). A cutting head according to any one of the preceding claims, wherein a ground spacer (50) is rotatably mounted on the cutting head (20) adapted to rest on a crop surface. Cutting head according to one of the preceding claims, wherein the blade fastening disk (28) and/or the shearing disk (44, 44') are made of steel, in particular spring steel. Cutting head according to one of the preceding claims, wherein second receptacles (38) are arranged on the projections () of the blade fastening disc (28), the second receptacles (38) having a different radial distance to the axis of rotation (22) of the cutting head (20) than the first shots (32). Cutting head according to one of the preceding claims, stops for limiting a rotation or pivoting angle of the blades (34) being or can be arranged on the blade fastening disc (28) or on the shearing disc (44, 44'). Mowing device (2) with at least one cutting head (20) according to one of the preceding claims.

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