DE8428123U1 - GARDEN DEVICE - Google Patents

Description

description

The invention relates to a garden device, such as a lawn fan or a lawn mower, with a height adjustment device, with the help of which the distance between the tool of the device and the floor can be adjusted is.

Especially for grass cutters and lawn mowers are very different Height adjustment devices known. Usually these see the attitude of the location of one Roll or a pair of wheels of the device, with which the device is moved over the ground. In a simple shape, a wheel is attached to one tip of a triangular plate, and a second tip of the Plate is pivotably attached to the device housing, while the third point carries a cross bolt that is inserted into a groove in the device housing is slidable when the plate is pivoted, and by tightening a Mother can be set in its position. While such an arrangement is simple and proportionate is inexpensive, it is not always easy to operate by the user.

"It is an object of the invention to provide a garden tool with a To create height adjustment device that is easy to manufacture and, in particular, easy to use.

To solve this problem, a garden tool is used at the beginning mentioned type that is characterized in that an adjusting element is rotatably attached to the device housing, that locking devices are provided for locking the adjusting element in different rotational positions are and that the wheel or the roller is coupled to the adjusting element in such a way that the axis of rotation of the

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Wheel or roller opposite the axis of rotation of the setting element is offset.

The height adjustment device according to the invention can be easy to manufacture and very easy to use by the user.

The locking part can be formed on the adjusting element and be brought into resilient engagement with one of several recesses in the device housing, each Recess defines a discrete rotational position. The locking part can be an outwardly protruding part on the

Adjustment element and elastic inwards with respect to the

'■ Adjusting element can be displaced to allow rotation of the

;! To enable adjustment element.

Preferably, the locking part is integral with the

I formed adjusting element, and it can be for example

\ wise on an elastically deformable extension of the adjustment

I 20

I element. In one embodiment of the

} finding, the setting element is essentially cyclical

Ϊ Lindrian, and this tongue extends lengthways the cylindrical surface. Such a structure simplifies the manufacture of the height adjustment device. the : Tongue can be arranged by a in the adjustment element

Spring loaded.

φ The locking part can be an actuating element for

I have loosening the locking part. If that

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p- locking part on an elastically deformable tongue

k- is located, the actuating part can be provided on the tongue adjacent to the locking part.

In the above-mentioned embodiment, the I cylindrical adjustment element can at one end a single

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have adjusting knob formed integrally with it, and the tongue is adjacent to the other end of the adjusting element connected to this, while the locking part is located adjacent to the adjustment knob. In this embodiment, the central area of the setting element can be rotatably fastened in the device housing, and the wheel or roller is coupled to the adjustment element at the other end.

The adjustment element can have one or more possibilities for coupling with the wheel or the roller. Further it can be designed to be detachable from the housing body and to be brought out of engagement with the wheel or the roller.

The invention is illustrated below with the aid of the exemplary embodiments showing figures explained in more detail.

Figure 1 shows a perspective view of a lawn aerator with a height adjustment device.

Figure 2 shows a side view of a height adjustment element in the height adjustment device.

FIG. 3 shows an end view of the element of FIG.

FIG. 4 shows a section along the line IV-IV from FIG.

FIG. 5 shows a view of the other end of the element from FIG. 3.

FIG. 6 shows a section along the line VI-VI from FIG.

Figures 7a and 7b each show side views of part of the lawn aerator, in which a modified Hoheneinstellelement is being attached and an end view of this Höheneinstellelementes.

FIG. 8 shows a section along the line VIII-VIII from FIG. 7a.

Figures 9a to 9c show views similar to Figure 7a, However, in which the Hoheneinstellelement attached to the lawn aerator and each figure one other position is shown.

FIG. 10 shows a section along the line X-X from FIG. 9b.

FIG. 11 shows, in a view corresponding to FIG. 2, another modification of the height adjustment element Figures 2 to 6.

FIG. 12 shows a view along the line XII-XII from FIG. 9.

FIG. 13 shows a view corresponding to FIG. 4, the modified height adjustment element from the figures 11 and 12 is shown.

The lawn fan shown in Figure 1 has a housing body 1, a handle 2, most of which is not shown, a tine assembly 3, which in use of FIG a motor, not shown, is rotated / a pair of front wheels 5 and a rear roller 40 / the one shown in FIG can not be seen, but is shown in Figures 7, 9 and 10 and their altitude by means of a pair

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can be adjusted by height adjustment devices 6 on opposite sides of the housing body 1. Of the Height adjustment devices can be seen in FIG. The invention relates essentially to heights-5

setting device, and. the structure of other parts of the The device is therefore not described in detail. A lawn aerator that uses the height setting 6 is, for example, in EU-OS 0 024 696

described.
10

The main part of each height adjuster 6 is a Height adjustment element 7, which is coupled to the respective end of the roller 40, as will be described later will. One of the height adjustment elements is shown in Figures 2 to 6 and its structure will be described below described. The height adjustment element 7 has a substantially hollow cylindrical shape and is in one piece made of plastic. At one end, which is the outer end in use, the element is closed and forms an adjusting knob 8 with corrugations 8 formed in its curved surface, which have a ribbed Surface that makes it easier to grasp the button. At the transition surface of the button 8 to the rest A flange 9 is formed as part of the element 7. Of the

^The middle region 10 of the element 7 has a substantially circular outer cross-section, but a pair of projections 11 are present along a common circumference. These projections are approximately diagonally opposite one another, but are offset from the exact diagonal position by an angle of approximately 7 to 8 °.

Inside the element 7 a pair of cylindrical pockets 12, 13 is formed, the open ends of which inner end of the element 7 are facing, so the

^ ⁵ end / that is opposite the adjusting knob 8. The axes

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these cylindrical pockets 12, 13 run parallel to the axis of the element 7, but are offset from this, so that in each case an axis on one side of the The axis of the element 7 is located. Only one of the pockets takes on a roller mounting axis 14 which is seated in the press the bag is held. In the illustrated element 7, which is attached to one side of the device, the Axle 14 fitted into pocket 12, while at the one to be attached to the opposite side of the device Element, the axis 14 is fitted into the pocket 13.

In use, the axles 14 are on both sides of the

Device arranged centrally in the ends of the roller 4 0 and

serve for the rotatable mounting of the roller on the device, as will be described in detail later.

A longitudinally extending tongue 15 is defined by a pair of elongated slots 16 and a transverse slot 17, which is located near the outer end of the adjustment button 8 and connects the slots 16, in The circumference of the cylindrical member 7 is formed. The slots 16 and 17 are directly through the wall of the cylindrical Element 7 placed so that the tongue 15 is formed, which with the remaining part of the element 7 near the inner end and remote from the adjustment knob 8 is connected. In their normal state, that shown in the drawings is, however, the tongue 15 forms a smooth continuation of the periphery of the element in most areas 7. At its free, outer end, the tongue 15 cuts the corrugated surface 4 of the adjustment knob 8 and the Flange 9 and has an outwardly projecting, endless, rectangular flange 18, the one Knöpf (Figures 3, 4 and 5) forms, with dessert help, the Tongue 15 can be depressed. Immediately within of the flange 18 is a much flatter one

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Flange 19, which is shortened by a pair with flange 18 * Side walls 20 is connected * As most clearly in the Figures 2 and 4 can be seen, there is the

e flange 19 further inside than the course of flange 9, <

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and it serves as a locking part for the height adjustment

development, which is described below. I.

Figures 7a and 8 show that part of the housing body s 1 on one side of the lawn fan, ari the one Height adjustment element 7 is attached. The housing body 1 has spaced apart, outer and inner Walls 30 and 31 with openings 32 and 33 in which the element 7 is fixed in use. The opening 33 is a simple circular hole into which the inner End of the adjusting element 7 rotatably extends. ;

The opening 32 is substantially circular, has JE j but two recesses 34, which face each other in approximately counter \, but offset from, the detailed diagonal direction at an angle of about 7 ° to 8 °. Along the outside of the opening 32, the wall 30 is thickened to form an annular wall 35. The inside of the wall 35 has a pair of recesses that are continuations of the recesses 34. Furthermore, the wall 35 has at the outer end three additional recesses 37 offset by 90 °, which extend through the entire thickness of the wall.

Figure 7b shows the inner end of the height adjustment element 7, which is to be attached to the side of the lawn aerator shown in FIGS. 7a and 8. It can be seen that Figure 7b FIG. 5 is a view similar to FIG. 5, but with the element 7 shown in the orientation in which it is shown in FIG the openings 32, 33 is inserted, as will be described later. The element 7 according to Figure 7b

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is slightly different from the one from the Figures 2 to 6, since it is inside the hollow cylindrical | Body has a spring 41, whose function later

will be described * First of all, it can be assumed G

that the element 7 of Figure 7b is the same as shown in Figures 2-6.

The type of attachment of the element. = 7 on the housing body Ϊ is described in connection with FIGS. 7 to 10. The element 7 is from the outside into the openings 32 and 33 of the housing body, with the inner end of the element, i.e. that shown in Figure 7b End in the orientation according to Figure 7 is inserted first. The recesses 34 in the opening 32 correspond in their shape and position the projections 11 of the element 7 and therefore allow the complete introduction of the Element 7 in an orientation in which the projections 11 are aligned with the recesses. Around the flange 19 to fit, the free end of the tongue is depressed by the user by pressing button 18 when the Element 7 is inserted, and during this process the axis 14 of the element 7 enters the bore of a centrally arranged, cylindrical extension 14a on the end face of the roller 4 0, whereby the roller on the

2 ^ axis is attached. The inward movement of the element 7 is ended when the flange 9 comes to rest against the outer end of the wall 35. In this position it can Element 7 are rotated, the projections 11 now being further inside than the wall 30. As soon as that

^ O element 7 is rotated, it can be because of the engagement before the jumps 11 with the wall 30 no longer pull out of the housing body.

Each of the three circumferentially spaced apart Recesses 37 can receive the flange 19 like this

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is shown in Figures 9 and 10, and when the element 7 is rotated / "clicks" after insertion the flange 19 into the closest of the three recesses,

~ for example the recess 1 in Figure 9a, whereby the element 7

is locked in its position. To release the element 7, the button 18 is pushed in by the user, thereby depressing the tongue 15 and moving the flange 19 out of the recess so that the element 7 can be rotated until the flange 19 engages the next recess 37 comes, for example the recess'"2" according to FIG. 9b. The three recesses 37 arranged at a distance from one another in the circumferential direction therefore form three different rotational positions in which the

Element 7 can be locked.
15th

It can be seen that the axis 14 is in each of the three locking positions of the element 7 is held in different positions with respect to the housing body because

the axis 14 opposite the axis of rotation of the element 7 on

* - ^{u is} offset.

These three different positions are indicated in Figures 9a to 9c and are selected so that three result in different height positions of the rear roller 4 0 with respect to the housing body, as shown in FIG Figures is indicated.

FIG. 10 shows a section through the element 7 in the height position "2" from FIG. 9b, the flange 19 in FIG the position "2" is shown latched into the recess 37 in the wall 35 and the tongue 15 with the Button 18 is in its normal, unpressed position. Figure 10 also shows the aforementioned Flange 9 in engagement with wall 35 as well as the location of the inner end of element 7 in opening 34 of the

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inner wall And the attachment of the roller 40 to the Axis 14. As Figure 1Ö can also be seen, is a Reinforcing web 14b for the cylindrical axis 14

receiving extension 14a of the role available, the 5

can also be seen in FIG.

As already mentioned above, the element 7 contains a spring 41 (Figures 7b and 10), which is the natural The elasticity of the tongue 15 assists and ensures that the tongue is in its normal, not depressed state Pressed position so that forcible engagement of the flange 19 with one of the recesses 37 is ensured,

'ι when the button 18 is released. As shown, has

the spring 41 is essentially S-shaped, the leg of the "S" which lies under the tongue 15 being a bent one Has end which is located below the button 18.

: You can see that the user controls the altitude of the Werkle stuff, so the tine assembly 3 with respect to the ground

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\, by rotating the two elements 7 between the in the

Figures 7a and 9a to 9c with "1", "2" and "3" designate

■ can set locking positions. This antigen or corresponding markings can be provided on the housing body to indicate the locking positions and display the height settings that can be reached through them. The elements 7 are expediently on both sides of the housing body set at the same time, but results the attachment of the role to the axles 14 also a

sufficient play for height adjustment on one side. 60 £ _{on the} housing body before the setting is carried out on the other: housing body side.

ϊ With the lawn aerator described, the highest input

position of the tool to move the tine arrangement 35

- 15 -

tion 3 over the surface of the floor, through which a raking effect and less a ventilation effect is achieved. Middle position · results in a slight ventilation effect, while through the lower setting is \ achieved a strong ventilation effect.

If for any reason it becomes necessary to remove either the height adjustment element 7 or the roller 40 Then this can be done by rotating the element 7 out of the X normal height adjustment range and into a position according to FIG. 7b, in which the above-described insertion process can be reversed.

The height adjustment device described is both simple to manufacture and simple to operate.

Of course, it is possible to provide a larger number of locking positions and the height adjustment device can also be used in conjunction with wheels instead of a roller.

Figures 11, 12 and 13 show another cross-sectional shape

of the tongue 15, which gives the tongue a great stiffness 25

and can still be formed in one piece with the element 7. As can be seen in particular in FIG the tongue has a pair of elongated ribs 38 along its side edges

align with the outer surface of the element 7, while the 30

the rest of the tongue is offset inward.

Claims (17)

UEXKWi-L- * STOL-BrERG * '· ": european patent attorneys PATENTANWÄLTE BESELERSTRASSE 4 D-20OO HAMBURG 52 DR. J.-D. FRHR. Won UEXKÜLL DR. ULRICH GRAF STOLBERG DIPL.-ING. JÜRGEN SUCHANTKE DIPL.- ING. ARNULF HUBER DR. AU-ARD from ΚΑΜΓΚΕ Black & Decker Inc. Prio: September 29, 1983 Drummond Plaza Office Park, GB 8326143 Kirkwood Highway, Newark, Delaware 19711 (21254 su / thu) V.St.A. September 1984 - Garden equipment protection claims 1. Gartenqerät with a wheel or a roller for support dt: s device body on the ground as well as with a Height adjustment device, characterized in that an adjustment element (7) rotatable on the device housing (1) is attached that locking devices for locking j locking of the setting element (7) in different ways Rotational positions are provided and that the wheel or the roller (40) in such a way with the adjusting element (7) is coupled that the axis of rotation of the wheel or the roller (40) relative to the axis of rotation (14) of the adjusting element (7) is offset. 2. Garden implement according to claim 1, characterized in that the adjusting element (7) is a locking part (19) on v / eist that it can be brought into elastic engagement with recesses (37) in the device housing (1), each recess (37) defining one of the rotational positions. Il I i M I (IWl * »I i II * I t I ti It * III t Il * I I I I (ti I l * • I I I I I t · · > I MM M t I ι »· ** * · 3. Garden tool according to claim 2, characterized in that the Verriegexungteil (19) has an outwardly projecting Forms part of the adjustment element (7) and enables rotation of the adjustment element (7) is elastically displaceable inward with respect to this. 4. Gardening device according to claim 3 / characterized in, that the locking part (19) is formed in one piece with the adjusting element (7). 5. Garden tool according to claim 4, characterized in that the locking part (19) on an elastic deformable tongue (± 5) is formed. 6. Garden implement according to claim 5, characterized in that the adjusting element (7) is substantially cylindrical and that the tongue (15) extends in the longitudinal direction of the cylindrical surface. 7. Garden implement according to claim 6, characterized in that the tongue (15) with one inside the adjusting element (7) arranged spring (41) is in engagement. 8. Garden tool according to one of claims 1 to 7, characterized by an actuating part (18) for releasing the locking part (19). 9. Garden device according to claims 5 and 8, characterized ₍ characterized in that the actuating part (18) on f the tongue (15) adjacent to the Verriegeiungöteil (19) is located. «* I · ttt t t t 10. Garden tool according to claim 6 / characterized / that the cylindrical regulating member (7) at a \ end an adjusting knob (8) integral with it and that the tongue (15) f connectedness adjacent to the other end with the adjusting element (7). | is while the locking part (19) is | adjacent to the adjusting knob (18). j 11. Gardening device according to claim 10, characterized in that
that the central region of the adjusting element (7) is rotatably fastened in the housing body (1). ] 12. Garden tool according to claim 10 or 11, characterized in that | indicates that the wheel or roller (40) on which the | Connection to the tongue (15) having the end with | the adjusting element (7) is coupled. | 13. Garden tool according to one of claims 1 to 12, da- 5 characterized in that the adjusting element (7) more than one point (12, 13) for coupling with the Has wheel or roller (40). ! 14. Garden tool according to one of claims 1 to 13, da- | characterized in that the wheel or roller (40) I is attached to an axis (14) which is voi »; f Adjustment element (7) parallel to the axis of rotation of the wheel | or the roller (40), but offset with respect to this f extends. I. 15. Garden tool according to claim 14, characterized in that I that the adjustment element (7) has at least two fastenings § has supply receptacles (12, 13) for an axis (14). 1 • · t »· ·· * I ί ♦ I β * t * t 4 f t III ι ti ■ · it «I β 16. Garden tool. According to one of claims 1 to 15, since ^ - characterized in that the adjusting element (7) is removable from the housing (1) and disengaged from the wheel or the roller (40) can be brought. 17. Garden tool according to claim 16, characterized by a single alignment position between the Einöllelement (7) and housing body (1) for removing the setting element (7).