Ground-guided processing device

Abstract

Lawn mower (1) with a housing (2) having a mowing channel (3) in which a rotationally driven blade (4) is arranged, which is at least partially enclosed by the mowing channel (3), wherein an insert (5) is introduced into the mowing channel (3) which shields the mowing channel (3) from the blade (4) and lines the mowing channel (3) at least in sections, characterized in that the insert (5) has a wear indicator (6) in the form of an area with reduced wall thickness (D), which is designed to indicate the state of wear of the insert (5).

Description

[0001] The invention relates to a lawn mower with a housing having a mowing channel in which a rotationally driven blade is arranged, which is at least partially enclosed by the mowing channel, wherein an insert is introduced into the mowing channel which shields the mowing channel from the blade and lines the mowing channel at least in sections, furthermore an insert for a mowing channel of a lawn mower.

[0002] A lawnmower is known from the state of the art in which an insert is inserted into the mowing channel.

[0003] According to the invention, the insert has a wear indicator in the form of an area with reduced wall thickness, which is designed to indicate the state of wear of the insert.

[0004] In this way, a user can determine the optimal time to change the insert, thereby avoiding premature wear on a metal housing into which the insert is inserted and thus potentially higher repair costs.

[0005] The lawn mower can be a walk-behind mower or a lawn tractor, a ride-on mower, or similar. The insert can completely cover the housing wall in the area of ​​the cutting channel. The insert can be attached to the housing. The insert can be designed to protect the housing behind it from wear. The housing wall can be thicker in the area of ​​the wear indicator than in the remaining areas of the housing wall. The housing wall can have a protective coating in the area of ​​the wear indicator. The wear indicator can be integrated into the insert.

[0006] The wear indicator thus provides the user with clear and easily recognizable feedback on when it's time to replace a worn part. Timely replacement can prevent higher repair costs.

[0007] The position of the wear indicator can intersect the blade's rotational plane or be aligned with the blade tip. The imaginary area swept over by the blade's rotational movement lies within the rotational plane. The blade's circular path is defined by the blade tip. Positioning the wear indicator aligned with the blade tip is advantageous because wear is greatest here, as the blade constantly ejects a stream of particles.

[0008] The wear indicator can be positioned in the front half of the cutting channel, as seen in the mowing direction of the lawnmower. The front half of the cutting channel is the first half that comes into contact with grass and any obstacles, such as molehills, when mowing the lawn. Therefore, most of the particles hit the insert in the front half of the cutting channel, causing greater wear.

[0009] The wear indicator can be designed as a recess or cutout in the wall of the insert. The recess or cutout can be located on the side of the insert facing the housing or away from the mowing area / cutting channel. This arrangement has the advantage that no grass or dirt can accumulate in the recess, which would then act as an obstacle to the side of the insert facing the blade. It can therefore be provided that the wear indicator is not visible when the lawn mower is newly assembled.

[0010] The mowing channel can be provided with an opening serving as a side discharge. The wear indicator can be located near the opening. The opening can be designed to accommodate a discharge chute, for example, if work is to be carried out without a grass catcher.

[0011] It is conceivable that the reduced wall thickness of the wear indicator is not less than 20%, preferably not less than 50%, of the main wall thickness of the insert. The main wall thickness of the insert can be between 1-4 mm, preferably between 2-2.8 mm.

[0012] The housing, or at least the housing section located behind the insert, can be provided with a color indicator, for example, a signal color. This allows for easier visual detection that the wear indicator has worn through. Furthermore, it is conceivable that the color of the insert and the color of the housing section behind it contrast significantly, or even easily visually.

[0013] The insert may be made of a plastic. For example, the insert may be made of ABS+PA and / or PP and / or PEEK and / or PC.

[0014] The height and / or lateral extension length of the wear indicator may be at least three times the thickness of the blade.

[0015] The insert can be designed as a replaceable spare part. The insert can have fastening means by which it can be removably attached to the housing.

[0016] The invention further relates to an insert for a mowing channel of a lawn mower, which has a wear indicator in the form of an area with reduced wall thickness, which is designed to indicate the state of wear of the insert.

[0017] For a better understanding of the invention, it is explained in more detail using the following figures.

[0018] They show in a highly simplified, schematic representation: Fig. 1 A perspective view of the underside of a lawn mower; Fig. 2 A perspective view of an insert for mounting in a mowing channel; Fig. 3 A cross-sectional view of a wear indicator.

[0019] By way of introduction, it should be noted that in the variously described embodiments, identical parts are provided with identical reference symbols or component designations. The disclosures contained throughout the description can be applied analogously to identical parts with identical reference symbols or component designations. Furthermore, the positional information chosen in the description, such as top, bottom, side, etc., refers to the directly described and illustrated figure, and these positional information must be applied analogously to the new position in the event of a change in position. FIGURE DESCRIPTION

[0020] Fig. 1 shows the underside of a lawn mower comprising a housing 2 having a mowing channel 3. A rotary-driven blade 4 is arranged in the mowing channel 3, which is enclosed by the mowing channel 3 and whose tip moves on a circular blade path. The mowing channel 3 serves, in addition to accommodating the blade 4, in particular for collecting and transporting cut grass, for example into a grass catcher box attached to the rear of the lawn mower 1 - viewed in the mowing feed direction X - or out of a lateral opening 8 of the mowing channel 3. An insert 5 is inserted into the mowing channel 3, shielding the mowing channel 3 from the blade 4, which lines the mowing channel 3 or the housing wall 10 enclosing the mowing channel 3, which insert 5 is particularly Fig. 3. The insert 5 has a wear indicator 6 in the form of a region with reduced wall thickness, wherein the wear indicator 6 is configured to indicate the state of wear of the insert 5. The opening 8 serving as a side discharge can have a closure element, in particular a flap, by means of which the opening 8 can be opened or closed. In the embodiment shown, the wear indicator 6 is arranged near the opening 8.

[0021] Fig. 2 shows a view of the insert 5, which is made of a plastic and, for example, comprises ABS+PA and / or PP and / or PEEK and / or PC. A metal insert that only partially covers the channel is also possible. The insert 5 has a body that is open at the bottom and functions as a mowing channel 3. In the middle of the body, the insert 5 has an opening through which the blade 4 projects into the mowing channel 3. The insert 5 also has an outlet from which cut grass can be discharged into a grass catcher box mounted behind the lawn mower 1. It can also be seen that the insert has a lateral opening 8 in the event that the cut grass is not to be discharged into the grass catcher box, but rather to the side. The wear indicator 6 is designed as a recess 7 in the wall of the insert 5. The recess 7 is on the side of the insert 5 facing the (not shown) housing 2 orarranged facing away from the mowing chamber / mowing channel. The insert 5 has, on its lower edge adjacent to the mowing channel 3, a plurality of fastening means distributed over the circumference, by means of which the insert 5 can be releasably fastened to the housing 2.

[0022] As can be seen from the cross-sectional view in Fig.3, it is provided that the position of the wear indicator 6 intersects the plane of rotation of the blade 4 or the wear indicator 6 is aligned with the blade circular path in the vertical direction, based on a normal operating state of the lawn mower 1. It can be provided that the position of the wear indicator 6 is arranged in a front half of the mowing channel, viewed in the mowing feed direction X of the lawn mower. The reduced wall thickness D of the wear indicator 6 can, for example, be not less than 20%, preferably not less than 50%, of the main wall thickness of the insert 5. The main wall thickness can be between 1-4 mm, preferably between 2-2.8 mm. Furthermore, it can be provided that the housing 2 or at least the housing section located behind the insert 5 is provided with a color indicator 9. This enables simplified visual detection that the wear indicator 6 has been ground through.The height and / or lateral extension length B, H of the wear indicator 6 can be at least three times the thickness of the blade 4. The insert 5 can be designed as a replaceable spare part. Furthermore, the housing wall 10 can be thicker in the area of ​​the wear indicator 6 than in the remaining areas of the housing wall 10. The housing wall 10 can have a protective coating in the area of ​​the wear indicator 6.

[0023] The embodiments show possible embodiments, whereby it should be noted at this point that the invention is not limited to the specifically illustrated embodiments thereof, but rather various combinations of the individual embodiments with each other are also possible and this possibility of variation lies within the skill of the person skilled in the art in this technical field due to the teaching of technical action by means of the objective invention.

[0024] The scope of protection is determined by the claims. However, the description and drawings must be used to interpret the claims. Individual features or combinations of features from the various embodiments shown and described may represent independent inventive solutions. The problem underlying these independent inventive solutions can be derived from the description.

[0025] All information on value ranges in this description is to be understood as including any and all sub-ranges thereof, e.g. the information 1 to 10 is to be understood as including all sub-ranges starting from the lower limit of 1 and the upper limit of 10, ie all sub-ranges begin with a lower limit of 1 or greater and end with an upper limit of 10 or less, e.g. 1 to 1.7, or 3.2 to 8.1, or 5.5 to 10.

[0026] For the sake of clarity, it should finally be pointed out that, in order to better understand the structure, some elements have been shown out of scale and / or enlarged and / or reduced in size.

Claims

[1] Lawnmower (1) with a housing (2) having a mowing channel (3) in which a rotationally driven blade (4) is arranged, which is at least partially enclosed by the mowing channel (3), wherein an insert (5) is inserted in the mowing channel (3) which shields the mowing channel (3) from the blade (4) and lines the mowing channel (3) at least in sections, characterized by that the insert (5) has a wear indicator (6) in the form of an area with reduced wall thickness (D), which is designed to indicate the state of wear of the insert (5). [2] Lawn mower (1) according to claim 1, wherein the position of the wear indicator (6) intersects a plane of rotation of the blade (4). [3] Lawn mower (1) according to claim 1 or 2, wherein the position of the wear indicator (6) is arranged in a front half of the mowing channel (3) as seen in the mowing feed direction (X) of the lawn mower (1). [4] Lawn mower (1) according to one of the preceding claims, wherein the wear indicator (6) is designed as a depression (7) or recess in the wall of the insert (5), wherein the depression (7) is located on the side of the insert (5) facing the housing (2). [5] Lawn mower (1) according to one of the preceding claims, wherein the mowing channel (3) has an opening (8) serving as a side discharge, wherein the wear indicator (6) is arranged near the opening (8). [6] Lawnmower (1) according to one of the preceding claims, wherein the reduced wall thickness of the wear indicator (6) is not less than 20%, preferably not less than 50%, of the main wall thickness of the insert (5). [7] Lawn mower (1) according to one of the preceding claims, wherein the housing (2) or at least the housing section located behind the insert (5) is provided with a color indicator (9). [8] Lawn mower (1) according to one of the preceding claims, wherein the height and / or the lateral extension length (H, B) of the wear indicator (6) is at least three times the thickness (S) of the blade (4). [9] Lawnmower (1) according to one of the preceding claims, wherein the insert (5) is designed as a replaceable spare part. [10] Insert (5) for a mowing channel (3) of a lawn mower (1), which has a wear indicator (6) in the form of an area with reduced wall thickness, which is designed to indicate the state of wear of the insert (5).

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