Bumper, autonomous mower or service robot having bumper

Abstract

The utility model relates to a bumper (12), which is used for an autonomous mower (10) or a service robot, and the bumper is provided with a first main wall and a second main wall (14, 16) which are separated from each other, and a plurality of supporting walls which are connected with the first main wall and the second main wall (14, 16). According to the invention, the plurality of support walls (18, 20) each have two wall sections (22, 24, 26, 28) which are oriented at an angle relative to one another, in particular at an isosceles angle, and which do not intersect one another. The utility model further relates to an autonomous mower (10) or a service robot which is provided with the bumper (12).

Description

TECHNICAL FIELD

[0001] The utility model relates to a bumper and a self-propelled mower or service robot with the bumper. BACKGROUND

[0002] A mower robot bumper with the generally known features of this type is known from the prior art. SUMMARY

[0003] The utility model relates to a bumper for a self-propelled mower or service robot, in particular a mower robot bumper, with the features of at least the independent claim. Advantageous refinements are derived from the dependent claims.

[0004] With the bumper according to the utility model, in particular a mower robot bumper, a collision caused by an impact with an object can be cushioned in an improved manner or, respectively, damped in an improved manner. Not only the object but also the self-propelled mower or service robot equipped with the bumper can be protected from damage. A high component integration can be achieved. A uniform force distribution and / or constant springing of the collision can be achieved. With the structure according to the utility model, the load can be distributed uniformly during compression of the bumper, in particular transferred to the self-propelled mower or service robot. The support elements or, respectively, the ribs can be prevented from colliding together in the compressed state. The folding and / or bending of the support elements or, respectively, the ribs, in particular relative to one another and not self, can be carried out in a controlled or, respectively, predictable manner. A high degree of compression of the bumper can be achieved. The main wall and the support wall can be brought to lie at least almost completely against one another in the compressed state. The cavity volume in the bumper can be reduced at least to a minimum in the compressed state at the compression position. The material outlay and / or the weight of the bumper can be kept low by virtue of the structure of the bumper according to the utility model. The safety and / or stability of the self-propelled mower or, respectively, service robot, in particular equipped with the bumper, can be improved.

[0005] The utility model relates to a bumper for a self-propelled mower or service robot, in particular a mower robot bumper, with the features of at least the independent claim. Advantageous refinements are derived from the dependent claims.

[0006] It is proposed that each support wall or, respectively, rib has two wall sections which are oriented at an angle, in particular isosceles, to one another, in particular without intersecting. The support wall is in particular configured V-shaped. The wall sections in particular correspond to the legs of the V. The support wall is in particular not configured X-shaped, whereupon an intersection is preferably not present.

[0007] The first and second main walls, which are spaced apart from each other, have a tendency to extend essentially parallel to each other, or in other words are oriented parallel to each other. "Essentially parallel" is to be understood here, inter alia, as an angular deviation of up to 5° in the longitudinal axis direction of the main walls, however preferably 0°. "Essentially parallel" is to be understood here, inter alia, as an angular deviation of up to 10°, in particular < 5°, preferably 1-4°, in the vertical axis direction of the main walls. In the vertical direction or in the vertical axis direction of the main walls, the main walls can be said to extend slightly towards each other or diverge. In the horizontal direction or in the longitudinal direction of the main walls, the main walls extend essentially parallel to each other. This applies at least to the relaxed, inelastically deformed or sometimes also plastically deformed or in other words curved state of the bumper. The support walls are provided, inter alia, for the shock-absorbing transfer of the collision force from the first main wall to the second main wall, in particular to the chassis or housing of the autonomous lawnmower or service robot, which is directly connected to the second main wall, by elastic deformation. The vertical axes of the main walls and the support walls are oriented essentially parallel to each other. The support walls are constructed, inter alia, spaced apart or staggered relative to each other. Some of the support walls are oriented, inter alia, parallel, preferably parallel staggered, relative to each other. Some of the support walls, in particular half of the support walls, are constructed, inter alia, parallel staggered, relative to each other. In particular, half on one side of the midsection of the bumper, or preferably the mirror plane, and the other half on the other side. Each support wall can have two wall sections or wall segments, which enclose an acute angle relative to each other. They are constructed, inter alia, isosceles acute-angled relative to each other. The support walls likewise enclose an acute angle with the main walls. In particular, the acute angle between the wall sections or wall segments of the support angle is smaller than the acute angle between the main walls connected to the respective wall sections or wall segments.

[0008] It is proposed that the bumper has a mirror-symmetrical plane and the support walls are arranged in pairs mirror-symmetrically with respect to the mirror-symmetrical plane and are configured especially protrusively opposite and especially only protrusively opposite. "Protrusively opposite" is especially to be understood as meaning that the regions of the support walls that are arranged further away from the mirror-symmetrical plane are between the regions of the support walls that are connected to the first and second main walls with respect to the mirror-symmetrical plane. With respect to the mirror-symmetrical plane, a geometry of "... <<< | >>>..." is thus formed, wherein the vertical signs correspond to the mirror-symmetrical plane and the tips of the greater-than or less-than signs point away from the mirror-symmetrical plane on both sides. The bumper is especially mirror-symmetrically configured. The bumper especially has two sides or halves that are mirror-symmetrically configured with respect to one another. The main walls can especially have slight bends with respect to one another in the region of the middle. The bumper can thus be configured with a blunt tip on the front side. The first and second main walls can each have an obtuse angle on the two sides of the middle of the bumper or on the two sides of the plane that extends through the middle or on the two sides of the mirror-symmetrical plane, thus especially on the back side. The angle is especially between 165° and 180°, preferably between 170° and 175°. The support walls on the two sides of the mirror-symmetrical plane are thus each arranged at the same distance from the mirror-symmetrical plane, especially mirror-symmetrically in pairs. The plurality of support walls is configured parallel with respect to one another on the respective side of the mirror-symmetrical plane. The support walls are configured V-shaped or V-like with respect to one another, especially staggered with respect to one another. In the middle, preferably on the plane that extends through the middle, especially on the mirror-symmetrical plane, no support walls are provided. The region of the middle of the bumper is more precisely free of support walls. The first support walls that are mirror-symmetrically opposite begin outside the middle, especially protrusively opposite. From the middle of the bumper, the first support walls do not come into contact at least in the relaxed or unloaded state of the bumper. The first support walls form a substantially hexagonal shape with the main walls. Preferably, by means of the protrusively opposite arrangement, it is possible to dampen or absorb collisions acting on one side of the bumper or on one side of the mirror-symmetrical plane of the bumper especially in the case of high compression on the one hand and the opposite side can assist in the resetting of the compressed first main wall towards the middle on the other hand. By means of this structure, a high compression capacity and the resetting of the first main wall in the opposite collision direction can be achieved.

[0009] It is proposed that the plurality of support walls is formed by two V-shaped and / or V-shaped and / or acutely angled wall sections with respect to one another, in particular by isosceles acutely angled wall sections with respect to one another. Preferably, half of the plurality of support walls is configured in a mirror image with respect to the other half of the plurality of support walls. Preferably, the support walls and / or their wall sections are configured in parallel offset with respect to adjacent support walls or their wall sections. Thereby, the aforementioned positive effects or advantages can also be achieved.

[0010] The bumper can then centrally have a mirror symmetry plane, wherein one of the support walls is mirror-symmetrically configured with respect to the support wall opposite thereto about the mirror symmetry plane. The wall sections of the opposite support walls then have opposite opening angles or protrude in opposite directions. The wall sections of the respective support walls are in particular configured isosceles with respect to one another. The wall sections thus in particular have the same length. In particular in the region of the connection of the respective main wall or in the connection region, the wall sections enclose the same angle with the main wall in particular.

[0011] It is proposed that the angle of the wall sections or wall sections acutely angled or V-shaped with respect to one another is 45° to 85°, in particular an angle of 75° or 67.5°. Thereby, a high, but also prescribed compression of the main walls with respect to one another can be achieved. With respect to the wall sections or wall sections of the support walls configured perpendicularly to the main walls or the intersection of the support walls, an undesired compression or arbitrary bending can thus advantageously be avoided.

[0012] It is proposed that the length of the wall sections of the support walls is less than or equal to the distance of the support walls with respect to the adjacent or next support wall, in particular the length of the wall sections essentially corresponds to the distance of the adjacent support walls oriented parallel to one another. Thereby, a high compression capability or a smaller remaining free compression volume can be achieved in particular between the main walls, preferably in the case of a compression bumper. A free space between the main walls can be achieved as small as possible during compression, in particular a small free space not filled by the support elements. The remaining compression achieved by the elastic deformation of the walls, in particular four walls (two main walls and two support wall sections) abutting against one another perpendicularly to the first main wall can thus be as identical as possible in all regions of the bumper. Very high forces can thus still be transmitted as uniformly as possible to the chassis or housing of the autonomous lawn mower or service robot, in particular without negatively affecting the path keeping of the autonomous lawn mower or service robot. Misalignments of the autonomous lawn mower or service robot can occur when the support walls and / or wall sections are bent in particular uncontrolled or soft compression regions are provided next to hard compression regions.

[0013] The bumper can be closedly configured with respect to the three sides, in particular with respect to the front side, the back side and the upper side. The side facing the ground, in particular the lower side, is preferably configured openly. The bumper can thus be produced in a simple manner and / or in one piece. A visual inspection of the state of the support wall can also be achieved in a simple manner by the user, for example. Material can be saved. A large area for air escape can be achieved when the bumper is compressed.

[0014] It is proposed that the main walls have different heights, in particular wherein the top wall connects the spaced-apart main walls in a sloping manner, preferably at an angle of 30-60°, in particular 50°. It is proposed that the support wall is connected to two main walls and a top wall which connects the two main walls at an angle. The main wall, or first main wall, of the front side can preferably have a smaller height than the main wall of the back side. The height of the wall section of the support wall can increase continuously between the first main wall and the second main wall. In particular, at least the front side or the first main wall can have a varying height, preferably a height which increases from the middle or the mirror plane of the bumper towards the side or lateral region. The stiffness of the bumper can thereby be increased. Good automatic cleaning of the bumper can be achieved by rain and the like. The compression strength can be varied by the height variation towards the side of the bumper, and / or a smaller main wall spacing can be compensated for by a higher support wall and / or a higher wall section in the lateral region.

[0015] It is proposed that the bumper is formed from a shape-elastic material, in particular from a preferably elastic or rubber-like plastic, in particular from rubber. The bumper is in particular formed from polyurethane. The bumper preferably has a resistance to compression of the two main walls relative to one another which is completely elastic up to < 300 N, in particular < 150 N, preferably < 50 N. The bumper is in particular designed such that the force peak on impact is reduced to below 260 N. The bumper has in particular a compression path of 10-30 mm, in particular approximately 15-20 mm. Thereby, at a speed of < 10 km / h, in particular < 5 km / h, and / or a weight of < 20 kg, in particular < 10 kg, of an autonomous lawnmower or service robot equipped with the bumper, a collision on driving onto an object, such as a tree, a pole, a stone, furniture or the like, can be damped in a defined manner. Damage to the object or the autonomous lawnmower or service robot equipped with the bumper can be avoided.

[0016] It is proposed that the two main walls have a spacing which is greater than the spacing of the adjacent support wall, in particular by more than 50%, preferably by approximately 20-30%, in particular by approximately 25%. Thereby, a good relationship of the compression ability to the defined compression characteristic can be achieved. In particular, the compression characteristic is relatively constant at least in the range of the entire front side of the bumper.

[0017] It is proposed that the main wall is approximately 50-150%, in particular approximately 50-100% thicker than the support wall. Thereby, a collision force or compression force acting on the main wall can be distributed to at least a plurality of support walls. The compression behavior of the bumper can be positively influenced.

[0018] It is proposed that the bumper can be connected with the chassis or housing of the autonomous lawnmower or service robot by means of a latching element, in particular having a main extension direction which is essentially parallel to the horizontal. Thereby, for example, a tool-free fixing of the bumper at the chassis or housing can be realized.

[0019] It is proposed that the bumper has a form-locking element for a push-on connection with the chassis and / or housing of the autonomous lawnmower or service robot. The form-locking element preferably has a main extension direction perpendicular to the horizontal. The form-locking element in particular has a T-shaped cross section. The form-locking element is preferably arranged on the back side of the second or back main wall. Thereby, a tool-free fixing of the bumper at the chassis or housing can be realized. A reliable connection with the chassis or housing can be realized. The back side of the bumper or the back main wall in particular is provided for directly, preferably flatly, abutting at the chassis and / or housing of the autonomous lawnmower or service robot. In particular, this takes place by means of a correspondingly configured abutment surface. The particularly flexible back side of the bumper or the back main wall is thus supported by the chassis and / or housing. A collision can be transferred to the chassis or housing flatly and / or in a damped manner, in particular as evenly as possible.

[0020] Furthermore, an autonomous lawnmower or service robot is proposed, which has the bumper mentioned at the outset, in particular a lawnmower bumper. A "service robot" is to be understood in particular as a mobile appliance which is at least partially automated, which carries out a work, preferably a treatment of a surface, in particular a so-called treatment surface, at least partially automatically. In particular, the robot is to start the work automatically, to end the work automatically and / or to select and / or influence at least one parameter relating to the treatment of the treatment surface automatically. Furthermore, an appliance is to be understood in particular, which moves automatically at least in order to carry out the work, in particular in order to treat the treatment surface, and / or which moves autonomously forwards in a predefined work area of the treatment surface. Typical application fields of such robots include a wide variety of activities, like for example cleaning, vacuuming, cleaning, mowing, collecting, sorting, watering, fertilizing, surveying, etc. Embodiments hereof are in particular autonomous cleaning robots, autonomous cleaning robots, autonomous snow removal robots, autonomous vacuum cleaners, autonomous swimming pool cleaning robots, autonomous floor scraping robots, autonomous seeders, autonomous watering robots, autonomous fertilizing machines, autonomous surveying machines, autonomous mowers, etc. Service robots of this kind have in particular a weight of less than 40 kg, preferably less than 20 kg, in particular less than 10 kg. Correspondingly, the bumper is in particular intended for service robots of this weight class. BRIEF DESCRIPTION OF DRAWINGS

[0021] Further advantages result from the following description of the drawings. Embodiments of the invention are shown in the drawings. The drawings, the description and the claims comprise a large number of combinable features. The person skilled in the art considers these features individually and in a meaningful further combination in an appropriate manner and combines them.

[0022] wherein

[0023] Figure 1 An autonomous lawnmower or service robot is shown, which has a bumper according to the invention, in particular a lawnmower bumper,

[0024] Figure 2 A bumper according to the invention is shown in a side view,

[0025] Figure 3 A bumper according to the invention is shown in an obliquely upward perspective view,

[0026] Figure 4 A bumper according to the invention is shown in an obliquely downward perspective view,

[0027] Figure 5 A bumper according to the invention is shown in a bottom view,

[0028] Figure 6The bumper according to the application is shown in a cross-sectional view through a mirror plane. DETAILED DESCRIPTION

[0029] Figure 1 A self-propelled mower 10 or service robot is shown, which has a bumper 12 according to the application, in particular a mower robot bumper. The bumper 12 is arranged at the front side 40 of the self-propelled mower 10, but can also be arranged at the back side, for example. The self-propelled mower 10 has a housing 100. The self-propelled mower has a chassis 102. The self-propelled mower can have a cover housing 104, which covers the chassis 102. The self-propelled mower 10 has a drive unit 106 for driving the wheels 108, in particular an electric motor for a single-wheel drive. The self-propelled mower has an energy supply unit 118, for example a battery pack, in particular a hand-held power tool - replacement battery pack. The self-propelled mower can in particular have a front roller 116, which is configured here not to be driven and as a trailing roller. The self-propelled mower 10 has a drive unit 110 for driving a cutting unit 112 or a further service unit. The self-propelled mower 10 or service robot has a control or regulation unit 114. The self-propelled mower 10 or service robot can have sensors or sensor units (not shown). The self-propelled mower 10 or service robot can have a navigation unit. The self-propelled mower 10 or service robot can have further protective equipment and / or a plurality of further features, which are known to the person skilled in the art familiar with self-propelled mowers, or mower robots or service robots. The self-propelled mower 10 or service robot is designed to autonomously perform service tasks in a working environment, in particular to autonomously mow a lawn surface.

[0030] The bumper 12 is essentially configured in a U-shape. The bumper can comprise plastic. The bumper is in particular formed from rubber or rubber-like plastic. The bumper is in particular configured in one piece, in particular manufactured in an injection molding method. The bumper is in particular not formed from metal, in particular not formed from a metal component. In particular, the bumper covers an angle range of 180°. The bumper can be arranged around a front region of the chassis 102 and below the overlying cover housing 104. The bumper 12 can also be fastened at or extend around other components of the service robot. The bumper 12 can be fastened at the chassis 102 by means of a mechanical fastening element.

[0031] Figures 2 to 5 The bumper 12 according to the application is shown in different views; Figure 6The bumper 12 according to the application is shown in a sectional view through the middle 76 of the bumper 12 or in the mirror plane 30 of the bumper 12.

[0032] The bumper 12 has a first and a second main wall 14, 16 which are spaced apart from one another. The main walls 14, 16 are oriented substantially parallel to one another or, respectively, oriented running parallel to one another (see in particular Figure 5 "substantially" is to be understood here as an angular deviation of up to 5°, preferably 0°, in the direction of the longitudinal axis and / or an angular deviation of up to 10°, in particular < 5°, preferably 1-4°, in the direction of the vertical axis. The main walls 14, 16 are thus oriented running without angular deviation relative to one another in the longitudinal direction 92. Smaller angular deviations can be produced in the height direction 94, as described below. The main walls 14, 16 can have a slight kink 96 in the region of the middle 76 of the bumper 12 or, respectively, in the mirror plane 30. The respective main wall 14, 16 can thus have an obtuse angle 80 of in particular > 170°, here approximately 173.5°, on both sides of the plane 78 running through the middle 76 of the bumper 12 or, respectively, on both sides of the mirror plane 30.

[0033] The bumper 12 has a plurality of support walls 18, 20 which connect the first and the second main wall 14, 16. These support walls are provided, for example, to transmit the impact force 56 from the first main wall 14 to the second main wall 16 in a damped manner by elastic deformation when the autonomous lawnmower 10 drives against an object. The force peak on impact can thereby be reduced. The autonomous lawnmower and / or the object can be protected. The main walls and the support walls 14, 16, 18, 20 are oriented substantially perpendicular to the underside 46 or, respectively, to the horizontal 62 of the bumper 12. The vertical axes 84, 128 of the main walls and the support walls 14, 16, 18, 20 are oriented substantially perpendicular to the underside 46 or, respectively, to the horizontal 62. The vertical axes of the main walls and the support walls 14, 16, 18, 20 are oriented substantially parallel to one another. "Substantially" is also to be understood here as an angular deviation of up to 10°, preferably < 5°. As can be seen from Figure 5 and Figure 6 As is apparent, the first or, respectively, front main wall 14 can for example have a vertical axis 84 which here for example has an angle 90 of 4° relative to the height direction or, respectively, the vertical direction 82. As is the case here, the first main wall 14 can for example be inclined by 4° relative to the vertical in the forward direction and relative to the underside 46. The main walls and the support walls 14, 16, 18, 20 can each have a chamfered corner 86, a rounded corner or the like in the region 88 of their distal end, in particular relative to the open underside 46. As can be seen from Figure 6 As is apparent, the second main wall 16 can also have a vertical axis 128 which here for example has an angle 130 of 1° relative to the height direction or, respectively, the vertical direction 82.

[0034] The support walls 18, 20 each have two wall sections 22, 24, 26, 28 which are oriented at an angle, in particular an acute angle, to one another. The two wall sections 22, 24, 26, 28 of the respective support wall 18, 20 are isosceles. They then have the same length 36. Each support wall 18, 20 has in particular only two wall sections 22, 24, 26, 28. The two wall sections 22, 24, 26, 28 of the respective support wall 18, 20 do not intersect. The support walls 18, 20 are constructed spaced apart from one another. The support walls 18, 20 are constructed parallel to one another or in other words extend parallel to one another. In particular, half of the plurality of support walls 18, 20 are constructed parallel to one another on either side of the mirror plane 30.

[0035] The bumper 12 has a mirror plane 30. The support walls 18, 20 are arranged in pairs between the main walls 14, 16 mirror-symmetrically with respect to the mirror plane 30. The support walls 18, 20 arranged in pairs mirror-symmetrically with respect to the mirror plane 30 are constructed protruding oppositely. The oppositely protruding support walls 18, 20 can in principle also take on shapes which differ from the in particular isosceles angular shape, for example a shape which protrudes convexly with respect to the mirror plane 30, etc. The plurality of support walls 18, 20 are constructed extending parallel to one another on the respective side of the mirror plane 30, in particular along the longitudinal direction of the wall sections 22, 24, 26, 28.

[0036] The plurality of support walls 18, 20 are each formed by two V-shaped and / or acute-angled wall sections 22, 24, 26, 28 which are oriented with respect to one another. In particular, isosceles acute-angled wall sections 22, 24, 26, 28. Half of the plurality of support walls 18, 20 are constructed oppositely V-shaped and / or acute-angled with respect to the other half of the plurality of support walls. Adjacent support walls 20, 22 are constructed parallel to one another offset on one or the other side of the middle portion 76 of the bumper 12.

[0037] It is proposed that the bumper 12 centrally has a mirror-symmetrical plane 30. The support walls 18, 20 of the support wall 18 are mirror-symmetrically configured with respect to the mirror-symmetrical plane 30 with respect to the support wall 20 opposite the support wall 18. The wall sections 22, 24, 26, 28 of the support walls 18, 20 then have opposite opening angles 32. The wall sections 22, 24, 26, 28 of the opposite support walls 18, 20 are particularly isosceles configured with opposite opening angles. In the middle 76 or on the mirror-symmetrical plane 30, no support walls 18, 20 are arranged. The region of the middle 76 of the bumper is more precisely free of support walls 18, 20. The first support walls 18, 20 opposite in mirror symmetry are at least not directly in contact. They form with the main walls 14, 16, so to speak, essentially a hexagon, particularly with two opposite isosceles, particularly essentially rhomboidally opposite wall sections 22, 24, 26, 28. In the region of the middle of the bumper 12, the support walls 18, 20 and the main walls 14, 16 form an essentially hexagonal compression region, particularly wherein the support walls 18, 20 are indirectly connected by the main walls 14, 16. In the middle region or in the region of the mirror-symmetrical plane 30, particularly in the relaxed state of the bumper 12 or in its at least frontwardly or frontally compressed state, no support walls 18, 20 are active.

[0038] It is proposed that the angles 32, 34 of the wall sections 22, 24, 26, 28 oriented V-shaped and / or at an acute angle with respect to one another are particularly 45° to 85°. According to Figure 5 , the angles 32, 34 are particularly 75° or 67.5°. As follows from Figure 5 , of the support walls 18, 20, respectively 7 support walls are configured parallel to one another on both sides of the mirror-symmetrical plane 30, or so to speak, are configured running parallel to one another. In the region 98, the bumper 12 transitions into the side part 120, in which region on both sides of the mirror-symmetrical plane 30, respectively two further support walls 18, 20 are arranged. They are likewise isosceles configured. Of the respectively 7 support walls of the previously mentioned support walls 18, 20, the angle 32 is approximately 75°. Of the respectively 2 support walls of the previously mentioned support walls 18, 20, in the transition region with respect to the side part 120, the angle 34 is approximately 67.5°.

[0039] It is proposed that the length 36 of the wall sections 22, 24, 26, 28 is less than or equal to the spacing 38 of the support wall 20 with respect to the adjacent or so to speak next support wall 20, particularly that the length 36 of the wall sections 22, 24, 26, 28 essentially corresponds to the spacing 38 of the adjacent support walls 20 oriented parallel to one another. The bumper 12 can be configured closed with respect to three sides, particularly with respect to the front side, the back side and the upper side 40, 42, 44. The side preferably facing the ground, particularly the lower side 46, is configured open.

[0040] The main walls 14, 16 can have different heights 48, 50. The top wall 52 connects the spaced-apart main walls 14, 16, in particular, in a sloping roof-like manner. The angle 54 of the top wall 52 is in particular 30-60°, here for example 50°. The front main wall 14 can have a smaller height 48 than the rear main wall 16. The front main wall 14 can have a height 48 that increases outwards, preferably from the middle 76 of the bumper 12 or from the mirror-symmetrical plane 30. The support walls 18, 20 can be connected to the two main walls 14, 16 and the top wall 52 that connects them obliquely.

[0041] The bumper 12 can be formed from or at least comprise a shape-elastic material, in particular a plastic or a rubber. In particular, the bumper is not formed from a metal or a metal component. In particular, the bumper 12 is formed from polyurethane. The bumper 12 can have a resistance to compression of the two main walls 14, 16 relative to one another that is up to completely elastic, preferably < 300 N, in particular < 150 N, preferably < 50 N. In the completely compressed state, the wall sections 22, 24, 26, 28 of the support walls 18, 20 are oriented substantially parallel to one another. In the completely compressed state, the wall sections 22, 24, 26, 28 of the support walls 18, 20 are oriented substantially parallel to one another and to the main walls 14, 16 that they support. The wall sections 22, 24, 26, 28 of the support walls 18, 20 abut one another and at the respective main wall 14, 16.

[0042] It is proposed that the two main walls 14, 16 have a spacing 72 that is greater than the spacing 38 of the adjacent support walls 18, 20. The spacing 72 is in particular sized to be 50% greater, preferably to be approximately 20-30% greater, in particular to be approximately 25% greater. The two main walls 14, 16 in particular have a spacing 72 of approximately 15-25 mm, preferably approximately 20 mm. The spacing 38 of the adjacent support walls 18, 20 is in particular approximately 12-20 mm, in particular approximately 16 mm. The length 36 of the wall sections 22, 24, 26, 28 is in particular approximately 12-20 mm, in particular approximately 16 mm. The thickness 74 of the support walls 18, 20 or of the wall sections 22, 24, 26, 28 is in particular approximately 1-2 mm, preferably approximately 1.5 mm. The thickness 132, 134 of the main walls 14, 16 is in particular approximately 1.5-4 mm, preferably approximately 2-3 mm. In particular, the thickness 132 of the first main wall 14 is approximately 3 mm, and preferably the thickness 134 of the second main wall 16 is approximately 2-3 mm. The main walls 14, 16 can be approximately 50-150% thicker, in particular approximately 50-100% thicker, than the support walls 18, 20.

[0043] It is proposed that the bumper 12 can be connected to the vehicle body 10 by a form- locking element, in particular a latching element 58 (see Fig. 2).Figure 3 The latching element 58 can be configured as a longitudinal recess, in which the chassis 102 latching protrusion is placed, for example. The cover housing 104 can limit the gap of the bumper 12, in particular along the vertical axis 84, that is to say along the height direction or vertical direction 82.

[0044] The bumper 12 can furthermore have a form-fitting element 68, which is used for push-on connection to the chassis 64 and / or the housing 66 of the autonomous lawnmower 10, for example. The form-fitting element preferably has a main extension direction 70 which is essentially perpendicular to the horizontal plane 62, that is to say preferably vertical. The form-fitting element has a T-shaped cross section, for example. The form-fitting element is preferably arranged on the back side of the second, that is to say back, main wall 16. The form-fitting element can be said to extend vertically along the back side of the second, that is to say back, main wall 16 as a T-shaped carrier. In particular, a two-sided recess can be said to occur between the crosspiece of the T-shaped carrier and the main wall 16. The bumper 12 can be introduced into a correspondingly configured slit or recess at the chassis 64 or, alternatively, at the housing 66, for example. The bumper 12 can be fixed at the autonomous lawnmower 10, that is to say service robot, in particular without tools and / or without further securing measures. Alternative securing or connecting measures are also conceivable. The width 122 of the bumper is 375 mm, for example. The depth 124 of the bumper is 130 mm, for example. The height of the bumper is 40 mm, for example. The width-depth ratio is 2-4, in particular approximately 3. The angle 135 between the first main wall 14 and the wall section 22 of the support wall 18 connected thereto is approximately 30-45°, in particular approximately 37.5°. The angle 136 between the second main wall 16 and the wall section 24 of the support wall 18 connected thereto is approximately 30-45°, in particular approximately 37.5°. The angles 135, 136 between the first and second main walls 14, 16 and the wall sections 20, 22, 24, 26 are in particular of the same size.

Claims

1. Bumper (12) for an autonomous lawnmower (10) or service robot, having a first and a second main wall (14, 16) spaced apart from each other and a plurality of support walls connecting the first and the second main wall (14, 16), characterized in that - the plurality of support walls each has two, angularly oriented, non-crossing wall sections (22, 24, 26, 28) relative to each other, and / or - the bumper (12) has a mirror symmetry plane (30) and the support walls are arranged mirror-symmetrically in pairs relative to the mirror symmetry plane (30), and / or - the plurality of support walls each is formed by two, V-shaped and / or acute-angled oriented wall sections (22, 24, 26, 28) relative to each other.

2. The bumper (12) of claim 1, characterized in that, The bumper (12) has a mirror symmetry plane (30) vertically and front-rear centrally straddling the bumper (12), and / or the support walls are mirror-symmetrically oppositely protrudingly configured in pairs.

3. The bumper (12) according to claim 1 or 2, characterized in that The plurality of support walls each is formed by acute-angled, isosceles oriented wall sections (22, 24, 26, 28) relative to each other, wherein on opposite sides of the central mirror symmetry plane (30) one half of the plurality of support walls is oppositely V-shaped and / or acute-angled configured relative to the other half of the plurality of support walls.

4. The bumper (12) of claim 3, characterized in that, In the case of a complete compression of the bumper (12), adjacent support walls do not contact and / or impede compression.

5. The bumper (12) according to claim 1 or 2, characterized in that The bumper (12) has a mirror symmetry plane (30) centrally, wherein one support wall of the plurality of support walls is mirror-symmetrically configured relative to the support wall opposite thereto about the mirror symmetry plane (30).

6. The bumper (12) of claim 1 or 2, characterized in that, The angle of the V-shaped and / or acute-angled oriented wall sections (22, 24, 26, 28) relative to each other is 45° to 85°.

7. The bumper (12) of claim 1 or 2, characterized in that, The length (36) of the wall sections (22, 24, 26, 28) is less than or equal to the spacing of a support wall relative to the next support wall.

8. The bumper (12) of claim 7, characterized in that, The length (36) of the wall sections (22, 24, 26, 28) essentially corresponds to the spacing of adjacent support walls oriented parallel to each other.

9. The bumper (12) of claims 1 or 2, characterized in that, The first and the second main wall (14, 16) have different heights (48, 50).

10. The bumper (12) of claim 9, characterized in that, A top wall (52) connects the spaced apart first and second main wall (14, 16) in a gable-like manner.

11. The bumper (12) of claim 9, characterized in that, The support walls are connected with the first and the second main wall (14, 16) and the top wall (52) connecting the two main walls obliquely.

12. The bumper (12) of claims 1 or 2, characterized in that, The first and the second main wall (14, 16) have a spacing relative to each other which is greater than the spacing of adjacent support walls relative to each other, and / or the first and the second main wall (14, 16) are each 50-150% thicker than the support walls.

13. The bumper (12) of claims 1 or 2, characterized in that, The bumper (12) can be connected with a chassis (64) or a housing (66) of the autonomous lawnmower (10) by means of a latching element (58); and / or the bumper (12) has a form-locking element (68) for a push-on connection with the chassis (64).

14. The bumper (12) of claims 1 or 2, characterized in that, The bumper (12) is integrally configured and / or is configured from a shape-elastic material and / or the bumper (12) is closed with respect to three sides and open with respect to the underside (46).

15. The bumper (12) of claims 1 or 2, characterized in that, The back side (42) of the bumper (12) is provided for direct abutment at the chassis (64) and / or housing (66) of the autonomous lawnmower (10) or service robot.

16. Autonomous lawnmower (10) or service robot with a bumper (12) according to any one of claims 1 to 15.

Images