WO2010091801A2

WO2010091801A2 - Hose cart

Info

Publication number: WO2010091801A2
Application number: PCT/EP2010/000608
Authority: WO
Inventors: Matthias Müller; Eugen Bischler; Thomas Sauter; Benjamin Asal
Original assignee: Gardena Manufacturing Gmbh
Priority date: 2009-02-11
Filing date: 2010-02-02
Publication date: 2010-08-19
Also published as: EP2396262A2; WO2010091801A3; EP2396262B1; DE102009000765A1; PL2396262T3

Abstract

For a hose cart comprising a hose drum that can be manually driven by means of a hand crank, the invention describes an advantageous assembly of the hand crank comprising a releasable coupling between the hand crank and hose drum.

Description

description

Schlauchwagen.

The invention relates to a hose trolley for garden irrigation with a hose reel and a hand crank.

In hose trolleys for garden irrigation, which are movable by hand and should therefore be of low weight and space, the winding of a unwound hose on the hose reel is typically done by means of a hand crank. The hand crank can be arranged directly on a shaft extending in extension of the drum axis or by interposing a gear arrangement on its own shaft. The sense of rotation of the hand crank for the winding process is given. The unwinding of the hose is done by pulling on the free end of the hose or a unwound hose section of the hose cart away. It is known, during unwinding of the hose, to decouple the rotation of the hose reel from the crank rotation and to block the rotation of the winch against the rewinding sense of rotation.

The invention has for its object to provide an improved in handling hose carriage with a hand crank.

The invention is described in the independent claim. The dependent claims contain advantageous refinements and developments of the invention.

The arrangement of the hand crank allows radially offset with respect to the drum axis of the hose drum in the direction of the guide handle assembly a particularly simple operation of the hand crank when winding the hose by the user can operate the hand crank in a substantially upright position of the support frame, without bending over. In particular, during the winding process, the user can also move the hose carriage in the direction of the lying hose and thus considerably reduce the tensile force compared to a collection of a long, lying hose into a standing hose wagon. Upon actuation of the hand crank when winding the hose on the hose reel, the user typically has one hand on the handle of the crank and the other hand on the guide handle of the support frame.

Due to the possibility of the hand crank being able to rotate decoupled from the rotation of the hose reel in a counter-rotation sense, which is subsequently understood to be against the winding sense of rotation, there is in particular the possibility of bringing the hand crank into a defined rest position in which Advantageously, a crank arm of the hand crank in axial projection with respect to the crank axis at least ü predominantly, preferably completely covered with the support frame. In particular, in a preferred embodiment, the hand crank in the upper end of an upright spar of a guide linkage of the support frame, which connects the guide handle with the drum, be arranged and aligned in the rest position with the crank arm parallel to the spar, in particular in the spar direction downward , If the hose cart tips over, the risk of damaging the hand crank is reduced as a result. In addition, advantageously, the handle of the hand crank to the crank arm can be folded down and parallel to the crank arm can be applied to this, which is particularly advantageous for a storage of the hose cart. While for the displacement of the crank in the said rest position, a limited rotatability in Gegenrehsinn sufficient up to the rest position, it is particularly advantageous to establish an unlimited rotatability of the hand crank in the opposite direction of rotation. As a result, the user is immediately aware that upon rotation in the counter-rotation direction, no action is taken on the hose reel, whereas a blocking of the crank rotation in counter-rotation sense by the user could be understood as to be overcome force of Schlauchaufwickelns and a subsequent increased exertion of force to damage the Crank arrangement could result. The signaling of a wrong direction of rotation to the user can be supported in an advantageous embodiment by a conspicuous noise during the rotation of the crank in the opposite direction.

In the preferred arrangement of the hand crank in the region of the upper end of a extending between hose drum and a guide handle assembly spar of a guide linkage is advantageously a force transmitting transmission element, in particular a flexible element, such. B. a chain or preferably a toothed belt protected within the hollow spar formed. An intended for the coupling and decoupling or crank rotation of the hose drum rotation clutch assembly is advantageously arranged at the crank axle and may be formed in particular coaxially to the crank axle.

The invention is further illustrated by means of preferred embodiments with reference to the figures. Showing:

1 a hose carriage in an oblique view,

2 is an enlarged view of the hand crank, 3 components of a coupling arrangement,

4 shows the coupling arrangement in decoupled position,

5 shows a detail of FIG. 4,

Fig. 6 is a view similar to FIG. 4 view coupled position of the clutch assembly.

Fig. 1 shows an oblique view of an advantageous embodiment of a hose carriage SW, in which two wheels are arranged spaced apart in the axial direction of a wheel axle LA and include a hose drum TR between them. The hose drum TR is rotatable about a drum axis TA, which is offset axially relative to the wheel axle LA. Wheels RA and drum TR are rotatably supported on common hub bodies NK about their respective axes. The support frame of the hose cart SW continues from the hub bodies NK via a guide linkage in the direction of a guide handle FG. The guide linkage in particular contains a hollow guide rail GH. At the guide handle FG facing end of the guide rail GH a hand crank HK is arranged, which is manually rotatable about a crank axis KA. In Fig. 1, the hand crank HK is sketched in a rest position in which the crank arm AK is substantially parallel to the guide rail GH. The crank handle GK protrudes parallel to the crank axis KA from the crank arm AK and can be folded in an advantageous embodiment in the direction of the curved arrow DK relative to the crank arm AK and applied parallel to the crank arm AK and transverse to the crank axis KA to the crank arm, which is especially for a storage situation of the hose cart is beneficial. The hose carriage is supported in a conventional manner on a support bracket SB in a substantially upright position.

Fig. 2 shows the hand crank portion of Fig. 1 in an enlarged view. In this case, the hand crank is shown in the rest position shown in Fig. 1 with a broken line and in a twisted against the rest position position with a broken line.

The hand crank is rotatable about the crank axis KA in both directions of rotation, which is indicated by the curved arrows DG and DW. In this case, the hand crank is coupled with rotation in a first direction of rotation DW via a transmission in such a way with the hose drum TR, that the hose drum TR rotates in a sense wound up the hose. In this case, a speed reduction or torque transmission between the rotation of the crank and the rotation of the hose drum TR is advantageously formed in a gear arranged between them, so that for a single revolution of the hose drum TR several, preferably at least two, in particular approximately three revolutions of the crank around the hand crank Crank axle are required. By the speed reduction results in a translation of the torque, so that the user expended force is less than in direct coupling of the crank with the drum axis. Advantageously, the user can hold in such a winding rotational movement of the hand crank the hose carriage on the guide handle FG with one hand and operate the hand crank with the other hand without occupy a stooped posture as in the arrangement of the hand crank in extension of the drum axis. Conveniently, the user can also process the hose carriage during the winding of the hose in the direction of the exposed hose section, so that the otherwise during sluggish pulling an outboard tube decisively determining the force Power to grind the exposed hose over the ground largely eliminated.

For the transmission of power from the crank to the hose reel, the transmission between them advantageously contains a flexible tension element, in particular a toothed belt, which can advantageously be accommodated protected in the hollow rod GH of the guide rod.

Upon rotation of the hand crank in the winding direction of rotation DW opposite direction of rotation DG, the rotation of the hand crank is advantageously decoupled from a rotation of the hose drum and the crank can be rotated in the direction of rotation DG freely about the crank axis KA. For free rotation in the direction of rotation DG, on the one hand, and the rotation of the hand crank in the first direction of rotation DW on the other, the transmission inserted between the crank and the hose drum advantageously contains a coupling arrangement which has a manual force applied by the user in the first direction of rotation DW of the hand crank transmits the drum TR and thus sets it in a winding sense of rotation and which, on the other hand, permits a free rotation of the hand crank in the opposite direction of rotation DG.

The possibility of decoupled from the rotation of the hose drum TR rotation of the hand crank in the direction of rotation DG allows advantageously to move the hand crank always in the rest position shown in Fig. 1 and in solid line in Fig. 2, which on the one hand with the advantageous additional folding ability of the crank handle GK for a storage position and on the other hand in the operation of the hose carriage to the effect that an overturning hose carriage and in the interrupted with 2 in the illustrated angular position of the hand crank existing risk of damage of the crank assembly is reduced. Advantageously, the hand crank in the direction of rotation DG not only up to the rest position shown in Fig. 1, but also beyond this freely rotatable. When removing the hose from the hose drum TR, the rotation of the hose drum is advantageously decoupled from a rotation of the hand crank as is known per se, so that when removing the hose, a risk of injury by a rotating crank is avoided.

The clutch arrangement is advantageously arranged in the region of the crank axle. A particularly advantageous embodiment of such a coupling arrangement is outlined in a representation of individual components prior to assembly in Fig. 3.

Essential components of the crank assembly with clutch assembly shown in an assembled view in Fig. 3 are the hand crank HK with an axial extension KF, a hollow axle HA, a sleeve HU, a driven gear AR, a timing belt ZR and a guide bush RB with a toothing BZ, the latter with respect to a housing GG, which is arranged at the upper end of the guide rail GH and at the same time forms the guide handle FG, is stationary and can also form part of the housing. The housing may advantageously be formed by two half-shells. Additionally provided is a torsion spring TF, which is connected to the sleeve HU and the hollow axle HA and determines a rotational angle rest position of the sleeve HU relative to the hollow axle HA.

The hand crank is inserted with the axial extension KF in the hollow axis HA in the axial direction and thereby positively connected to rotations about the crank axis KA with the hollow axis HA. The hollow axle HA can also be di- be formed directly to the hand crank and form part of the same. The hollow axle HA has on its outer side a guide groove, which has an axially extending first portion LS and an outgoing therefrom spiral portion WS, which ends at a point ES. The sleeve HU has a guide element, for example a pin, which protrudes from the inner wall of the sleeve HU in not visible in Fig. 3 position and cooperates with the groove in the outer surface of the hollow axis HA. The hollow axle HA is inserted axially into the sleeve HU, wherein said guide element engages in the groove LS, for example in the form of a pin. The torsion spring TF is connected on the one hand with the sleeve HU and the other with the hollow axis HA in such a way that the torsion spring TF with its spring force on the sleeve HU around the hollow axis HA so twisting acts that the guide element on the inner wall of the sleeve HU is pressed in the coil section WS in the direction of the end position ES. Advantageously, the torsion spring is still biased at the end of ES of the coil section WS fitting pin of the sleeve HU. The sleeve HU can be rotated against the restoring force of the torsion spring relative to the hollow axis HA, wherein the pin slides in the helical section WS and thereby takes place a relative axial displacement between the sleeve HU and the hollow axle HA.

The sleeve HU carries in the axial direction of the hand crank away on the output gear AR assigning a front toothing HZ, which cooperates for the transmission of a manual force to the hose reel for winding the hose with a counter-toothing AZ on the output gear AR. The output gear AR has an external toothing RZ, in which a toothed belt ZR rests with its toothing.

The output gear AR can be placed in the axial direction on the circular cylindrical outer surface of the sleeve RB and rotatably supported there. The sleeve HU is in the sleeve RB can be used axially. The inner surface of the bushing RB is divided axially into two sections, wherein a first, circular cylindrical section axially facing the hand crank and a second, the hand crank axially remote section has a latching structure BZ. The sleeve HU is rotatably mounted in the erstgenann th, circular cylindrical portion of the inner surface of the sleeve RB about the crank axis KA and has for this purpose a circular cylindrical portion of its outer surface. The hand crank facing away from the sleeve HU additionally radially resiliently held locking cam RF, which can cooperate with the latching structure BZ in the sleeve RB in such a way that rotation of the sleeve HU is blocked in a first rotational direction DW by hooking the locking cams in the latching structure and a rotation in the opposite direction of rotation is possible by radially deflecting the spring-loaded locking cams RF and skipping the latching structures BZ via slowly rising flank surfaces. The sleeve HU is axially displaceable within the sleeve RB in the manner described below, wherein the locking cams RF can be moved axially beyond the region of the latching structure BZ and thereby a previously given blocking in the direction of rotation DW is canceled.

Fig. 4 shows the components shown in Fig. 3 in a separate position in a joined state. The hand crank is completely inserted with its extension KF in the hollow axle HA and locked there and thus fixed axially. By corresponding structures, the hollow axle HA and the hand crank are further rotatably coupled together. The hollow axle HA has at its end facing away from the hand crank a radially projecting annular web SH, which rests axially between two guide webs SG of the housing, whereby the hollow axle together with the associated hand crank axially supported against the housing and is rotatably mounted about the crank axis. The support and storage of hollow axle HA with hand crank can also alternatively or additionally take place at the axial positions different from the end of the hollow axle.

Fig. 4 shows the rest position of the arrangement in which under the action of the torsion spring TF, the sleeve HU is within its movement possibilities relative to the hollow axis HA in a crank handle axially close position and called the guide element pin on the inner wall of the sleeve HU on End ES of the helix section WS of the hollow axle HA is located. The spur toothing HZ of the sleeve HU and the counter-spur toothing AZ of the driven wheel AR are axially spaced apart in this position, so that a rotation of the driven gear AR occurring during unwinding of the hose is not transferred to a rotation of the sleeve HU and thus the hand crank and that, on the other hand, rotation of the hand crank in the direction of rotation indicated by DG in Fig. 3 is not transmitted to rotation of the driven gear AR and thus the hose reel.

In the axial position of the sleeve HU sketched in FIG. 4, the locking cams RF are located in the axial direction in the region of the latching structure BZ of the sleeve RB, which is shown in greater detail in FIG. 5 in an enlarged detail. In Fig. 5 direction of rotation arrows DG and DW are located, which are assigned to the same designated directions of rotation of the hand crank of Fig. 3. Upon rotation of the sleeve in the direction of rotation DG, the locking cams slide along slowly radially inwardly extending contact surfaces of the latching structure BZ and are thereby pressed resiliently radially inwards. When the locking cams have overcome the slowly inwardly extending flanks, the locking cams are resiliently pressed radially outward, so that when turning the crank with the sleeve in the direction of rotation DG a clicking sound is produced, which additionally signals to the user that it is not one is coupled to the drum motion coupled direction of rotation. The crank with the sleeve can be rotated endlessly in this direction. The coupling between the sleeve HU and the hollow axis HA takes place by abutment of the pin on the inner wall of the sleeve HU at the end ES of the helix section WS of the hollow axle.

If the hand crank is rotated in the direction of rotation DW, such rotation takes place in a first rotation angle section without coupling to a rotation of the hose drum TR, since the serrations HZ and AZ are disengaged. However, the sleeve HU can only be rotated by a small angular range until the locking cams RF and the latching structure BZ abut one another with the radially steep flanks and prevent further rotation of the sleeve HU relative to the latching structure BZ fixed to the housing. In this angular position of the sleeve HU, the hand crank with the hollow axis HA can still be rotated in the direction of rotation DW, wherein the sleeve HU does not rotate with and the pin slides on the inner wall of the sleeve HU within the helical section WS in the outer wall of the hollow axle HA. Due to the helical orientation of the section WS while the sleeve HU is axially displaced away in the direction of the axially fixed hand crank, so that the face gear HZ and the external teeth AZ to move axially towards each other and engage each other, wherein upon entry of the face gear HZ in the counter-spur toothing AZ in the axial direction, the rotation of the sleeve by engagement of locking cam RF and locking structure BZ is not yet rotatable and the cam on the inner wall of the sleeve HU still moves in the course of the filament WS.

Upon further rotation of the hand crank of the pin on the inner wall of the sleeve HU is further shifted within the helical section WS in the direction of the linear section LS and the locking cam RF occur axially from the region of the latching structure BZ, wherein the torsion spring TF is further tensioned. at Reaching the linear portion LS at the beginning of the coiled portion WS, the pin protruding from the inside of the sleeve HU abuts the guide groove in the outer surface of the hollow shaft HA at the transition between the coil portion WS and the linear portion LS in the circumferential direction and the manual force of the user is completely transferred by this stop on the sleeve HU and a further relative movement of the hand crank in the direction of rotation DW relative to the sleeve no longer takes place. The serrations HZ and AZ are engaged. A further axial displacement of the sleeve HU away from the hand crank is locked. A further rotational movement of the hand crank in the direction of rotation DW is thus fixedly coupled to a rotation of the sleeve HU in the direction of rotation DW, wherein the sleeve HU with now pushed out in the axial direction of the locking structure BZ locking cam RF is now relative to the sleeve RB indefinitely rotatable in the direction of rotation DW , Since the rotation of the crank in the direction of rotation DW via the sleeve HU counteracts the rotational resistance of the hose drum during winding of the hose, the sleeve HU remains in the direction of rotation DW with respect to the hollow axle HA with the journal for the entire duration of the action of the user force on the crank in the direction of rotation DW as a guide element at the beginning of the helical section WS and in the axial direction of the hand crank moved away with mutual engagement of the serrations HZ, AZ and disengage the locking cam RF with the latching structure BZ. After elimination of the hand force acting on the crank in the direction of rotation DW, the sleeve HU is again rotated relative to the hollow axis HA under the action of the spring force of the torsion spring TF, wherein said pin slides in the spiral section WS up to its end and the sleeve HU thereby slides again moved axially in the direction of the hand crank and the engagement of the serrations AZ, HZ is canceled.

The features indicated above and in the claims as well as the figures which can be seen in the figures are both individual and various Combination advantageously feasible. The invention is not limited to the exemplary embodiments described, but can be modified in many ways within the scope of expert knowledge.

Claims

claims:

1. Hose trolley with a carrier frame containing a guide handle assembly and with a held in the support frame Schlauchtrom- mel and coupled to this via a gear and a clutch assembly crank, wherein for rotating the hose reel in a drum winding a drum rotation on the hand crank into a first Cranking direction exerted manual force on the transmission to the hose drum is transferable, characterized in that the hand crank is rotatable in a direction opposite to the second crank rotation direction second crank rotation and thereby decoupled via the clutch assembly of a drum rotation and / or that the hand crank axially spaced from the hose reel and is arranged offset in the direction of the guide handle assembly.

2. Hose trolley according to claim 1, characterized in that a wound-up portion of the hose can be unwound by pulling on a unwound portion while the hand crank is decoupled from the drum rotation.

3. hose reel according to claim 1 or 2, characterized in that the crank axis is parallel to the drum axis.

4. Hose trolley according to claim 3, characterized in that the crank axle does not cut the hose reel.

5. hose reel according to one of claims 1 to 4, characterized in that the crank axis of the hand crank of the guide handle assembly is arranged offset in the direction of the hose drum by less than the crank radius of the hand crank.

6. Hose trolley according to claim 5, characterized in that the hand crank is arranged on an elongated upright spar of the support frame.

7. hose reel according to claim 6, characterized in that the hand crank in the second crank direction of rotation at least to a rest position is rotatable on, in which the crank arm of the hand crank in axial projection substantially overlaps with the spar.

8. hose trolley according to claim 6 or 7, characterized in that the spar is hollow and surrounds a transmission element.

9. hose trolley according to one of claims 1 to 8, characterized in that the transmission includes a flexible power transmission element, in particular a toothed belt.

10. hose trolley according to one of claims 1 to 9, characterized in that the coupling arrangement between the gear and crank handle is arranged.

11. Hose cart according to one of claims 1 to 10, characterized marked, that the transmission is designed for a speed reduction or torque ratio of the rotation of the hand crank for rotating the hose drum during winding of the hose.

12. hose reel according to claim 11, characterized in that the ratio of the speed reduction at least 2: 1, preferably at least 3: 1.

13. Hose cart according to one of claims 1 to 12, characterized in that the handle of the hand crank is pivotable towards the crank arm in a rest position.

14. Hose trolley according to one of claims 1 to 13, characterized marked, that the coupling arrangement an axially displaceable sleeve with a

Includes driver structure, which can be brought by axial displacement from a freewheeling position in a drive position with a counter-structure of a driven gear of the transmission in engagement.

15. Hose trolley according to claim 14, characterized in that in the

Freewheeling position of the driver structure and the counter-structure are disengaged and the axial displacement takes place in the drive position against a spring force.

16. hose carriage according to claim 14 or 15, characterized in that the axial displacement takes place by means of a guided in a helical section between a crankshaft and the sleeve guide member.

17. Hose trolley according to one of claims 14 to 16, characterized in that the sleeve is blocked in the axial rest position in the first crank rotation direction and can be released by the axial displacement.