WO1997032694A2

WO1997032694A2 - Arrangement for connecting components of a manually-operated implement

Info

Publication number: WO1997032694A2
Application number: PCT/HU1997/000008
Authority: WO
Inventors: Zoltán PERÉNYI; János JAHOLA
Original assignee: Perenyi Zoltan; Jahola Janos
Priority date: 1996-03-04
Filing date: 1997-02-27
Publication date: 1997-09-12
Also published as: HUP9600539A2; CN2298103Y; DE29780235U1; HUP9600539A3; HU1008U; HU9600539D0; WO1997032694A3; HU9600132V0; WO1997032694B1

Abstract

The invention concerns an arrangement for connecting components of a manually-operated implement. According to the invention, a head part to be used for performing the work is connected to a neck part. The neck part is formed with a connection endpiece which has a recess for holding the shaft. The connection endpiece (1) consists of a rigid section (11) and a resilient section (12). Along its generatrix (13), the rigid section (11) is in contact with the neck part (2) of the implement. The neck part (2) is connected to the rigid section (11) of the connection endpiece (1) along the generatrix (13), following the axis of symmetry of the connection. The rigid and resilient sections (11, 12) of the connection endpiece consist of a single cable. The implement according to the invention is used in particular in the area of agricultural and garden implements.

Description

CONNECTION ARRANGEMENT OF COMPONENTS BY HAND

The invention relates to a connection arrangement of components of hand-operated work tools, a head part serving for work being connected to a neck part, which neck part is shaped with a connection outlet, and in which the connection outlet is equipped with a cavity serving to receive the shaft . According to the area of application, the invention can be classified in particular in the group of tools used in agricultural and gardening; it serves for the connection arrangement of those components.

In everyday life you often have to face the problem that the shaft of some work tool - hoe, spade. Shovel - becomes insecure; it is said that "the shaft begins to shake". For a while, and to a certain extent, it helps if you split the shaft and stick a wedge in it. But during work or during storage of the work tool, the above problem due to the drying out of the wooden shaft can be repeated several times: the wedge is deeper and deeper in vain until it is finally split, or its strength is greatly reduced, than you have to replace it. The cost of the wood material, the complications when buying and replacing the shaft, and the time lost justify the improvement of the previously used solution. Numerous constructions can be found in everyday practice under the national and international protection documents, which show secure connection designs between the shaft and the work tool.

The US-P 4,334,538 relates to a multi-purpose gardening tool, wherein a neck part is riveted to the head part. The inner cone of the shaft is placed on the conical neck part

REPLACEMENT LEAF set. The connection is fastened with a wing screw passing through the shaft and neck part. The undoubted advantage of the construction is its quick interchangeability, but a wing screw only has to be released and screwed in for the removal or insertion of the shaft. Experience unfortunately suggests that at the beginning precise adjustment between the cones of the neck part and the shaft can become loose due to the drying out of the wooden material, and the shaft on the cone can move now and then later during work, this is only partially compensated for by the screw because the shaft can wobble around the axis of the screw from time to time, which will interfere with the work. DE-OS 23 47 667 relates to the connection arrangement of the head part of the work tool with the neck part mounted in it and the shaft, in which elements that support two rings and two-armed levers are mounted in the head part, which grip the shaft with cutting outputs while he is attached to the head part of the work tool by claws. The construction between the shaft and the head part, due to the drawing, provides a very fast attachment by that ingenious design. But it is unfortunate that the securing claws for fastening between the head part and the neck part are placed in a single plane. For this reason, a smaller bending moment resulting from the force that arises during work can acceptably loosen the connection fairly easily. In addition, the witty design consists of quite a few elements that require precise fabrication.

In the training dealt with in HU-P 206 425, a neck-shaped socket is attached to the head part of the pusher, which frames the shaft by means of a fixed connection. The cutting edges of the stuff suitable for cultivating arable land are very cleverly shaped, but that is because of the

-2-

REPLACEMENT LEAF This construction, unfortunately, does not seem to prevent drying up. The precise fit of the bore of the neck part is a factor which increases the production costs, with consideration also that the adjustment of the head part by driving in a wedge does not seem to be possible here either due to the angular arrangement of the head and neck part.

Although the above constructions, or the state of the art, for the modernization of the hand-operated tools, as well as for the precise connection of their construction parts, are devoted to a wide field, which is a prerequisite for trouble-free and accident-free work, but they do not seem to solve these important requirements accordingly. But apart from the above, from the wedging of the shaft offered by the experience, there is no other corresponding solution for adjustment, i.e. for subsequent adjustment of the aging shaft built into the neck part. In addition, the newer designs are usually also more complicated. consequently therefore more expensive than the connection arrangement which is generally used in practical life.

The object of the present invention is to further develop the state of the art by eliminating the deficiencies mentioned, i. H. to design a connection arrangement of components of hand-operated tools in such a way that the neck part fastened to the head part is stable with the shaft, ie. H. can be connected without shaking, which connection does not require subsequent wedging due to the splitting of the shaft, and the arrangement is simple and inexpensive to manufacture, and if the shaft can be replaced for any reason, this can be done proportionately are simply accomplished. This is achieved according to the invention in that

-3-

REPLACEMENT LEAF on the head part serving to carry out the work, the neck part is connected to such a connection outlet, which is made to the end of a single wire with the same profile by winding. and the connection outlet consists of a rigid and an elastic section, and that the same profile elements are used for the wire forming the connection outlet on a conical jacket; and that the conscious assembly, that is to say the combination of the partial measures in relation to the state of the art, has significant additional effects.

The essence of the invention, based on the above findings, is such a connection arrangement of components of hand-operated tools, a head part serving for work being connected to a neck part, which neck part is formed with a connection outlet, and in which the connection outlet is designed with a cavity for receiving the shaft. The connection arrangement is characterized in that the connection outlet consists of a rigid and an elastic section. The rigid route touches along its length — long generators with the neck part of the tool. The neck part is connected along the generatrix, like the axis of symmetry of the bond, to the rigid section of the connection outlet. The rigid and elastic section of the connection outlet consists of a single wire with the same profile throughout.

According to a further embodiment, the connection outlet is made of a single wire with a square profile by winding. Boundary surfaces of the square wire lying on the minimum diameter form an angle that is equivalent to the pitch angle to the axis of symmetry of the connection outlet.

This is a further advantageous embodiment, the wire being shaped with a round profile.

-4-

REPLACEMENT LEAF A further advantageous embodiment, in which the rigid section of the connection outlet to the neck part is connected by welding

Another advantageous embodiment, in which the profile elements of the wire lying on the minimum diameter in relation to the axis of symmetry of the connection outlet are placed on a cone jacket, which cone jacket becomes farther from the head part, and the cone angle of the cone jacket is smaller than the self-locking limit - worth 3 _° is advantageous.

Also advantageous is the embodiment in which the wire is formed at its end from the tubular neck part of the working tool with a bend in the direction of the generatrix, and the wire is welded to the tubular neck part of the working tool. A claw is configured on the tubular neck part.

The invention is explained in more detail below with reference to the exemplary embodiment shown in the drawing. It shows

Fig. 1 shows the connection arrangement in a side view with a partial section.

Fig. 2 in cross section along the II-II plane.

Fig. 3 shows the head part in cross section with the subsequent neck part.

In Fig. 1 it can be seen that the neck part 2 fastened to the head part 3 of the work tool is welded together with the rigid section 11 of the connection outlet 1, which rigid section 11 receives its rigidity from the weld 15. This rigid section 11 contacts the neck part 2 of the work tool along its length-long generatrix 13, such as an axis of symmetry of binding. The other part of the connection outlet 1 is created by its elastic part 12, which is not attached to the neck part 2 by welding. The

-5-

REPLACEMENT LEAF Rigid section 11 and elastic section 12 of the connection outlet 1 consist of a single wire 14 with the same profile throughout, which is square in the embodiment according to FIG. 1. The profile elements of the wire 14, such as the profile elements lying on the minimum diameter. are placed on a cone jacket. This conical jacket becomes farther away from the head part 3 of the work tool. and its cone angle β is smaller than the self-locking limit value, and it is shown on the drawing with the advantageously chosen 3 °. These profile elements 16 touch deformation arising with the shaft 4 after its insertion in the connection outlet. In the drawing, the shaft 4 is still shown in the position of except the connection outlet. 2 shows, along the generatrix 13, such as the binding symmetry axis, the cross section of the neck part 2 of the working tool and the connection outlet 1 connected by welding 15. 3 shows that configuration. the head part 3 being formed by bristles 31 with a tubular neck part 20 on which a claw 21 is formed. In this embodiment, the connection outlet 1 is formed at its end from the tubular neck part 20 with a bend 18 in the direction of the generatrix 13, which is further welded together to form the tubular neck part 20. In this embodiment, the wire 14 has a round profile, from which the rigid section 11 and the elastic section 12 are also produced by winding. The use of the connection arrangement follows from the figures. The shaft 4 can be easily driven into the connection outlet 1 with a small cone β even in the case of a shaft 4 with a cylindrical end according to the embodiment in FIG. 1 by turning and pressing. but the profile elements

-6-

REPLACEMENT LEAF 16 of the wire 14 touch the jacket of the shaft 4 deforming and wedging firmly. If the shaft 4 eventually subsided due to the drying out of the wood, it is sufficient. to drive the shaft 4 a little further. and the strength remains flawless as before. In the head part 3 made of wood, as is advantageous, for example, in the case of a handle broom, where the tubular neck part 20 is pressed in, according to the embodiment shown in FIG. 3, the claw 21 performs more stably with a deflection in the direction of a generator Consolidation. The insertion of the shaft 4 is also carried out here by turning and pressing. As a result of the small force development, the wire 14 with a round profile also provides appropriate fastening in this case.

The advantageous effects of the invention are considerable. There are a large number of hand-operated tools, such as Hoe. Spade, shovel, rake, scythe, fork, various masonry tools, brooms. Stick brooms, etc., where the invention can be used reasonably. The connection outlet 1 can namely be made very easily from cheap wire material, and it can be productively attached to the head part 3 of the work tool by welding. The shaft 4 can then also be connected simply by screwing in to the connection outlet; but the attachment is very firm after all. The readjustment that may be necessary - because of the drying out of the wood - is unproblematic, it does not require the shaft 4 to be split and wedged. This way, the shaft does not split or pull, and its lifespan increases considerably.

REPLACEMENT LEAF THE LIST OF REFERENCES connection outlet

11 stiff stretch

12 elastic stretch

13 generators

14 wire

15 weld

16 Profi1e1ement

17 -

18 deflection

Neck part

20 tubular neck part

21 claw

Headboard

shaft

α pitch angle of the winding

ß cone angle

Claims

claims

1. Connection arrangement of components of hand-operated tools, a head part serving for work being connected to a neck part. which neck part is shaped with a connection outlet. and in which the connection outlet is designed with a cavity serving to receive the shaft, characterized in that the connection outlet Cl) consists of a rigid section Cll) and an elastic section (12), and that the rigid section Cll) runs along their length-long generators C13) touches the neck part C2) of the work tool, which neck part C2) is connected along the generatrix C13) like the binding axis of symmetry to the rigid section C1) of the connection outlet C1). further that the rigid and elastic route Cll. 12) of the connection outlet C1) consist of a single wire C14) with the same profile throughout.

2. Connection arrangement according to claim 1, d a d u r c h g e k e n n z e i c h n e t. that the connection outlet Cl) is made of a single wire C14) with a square profile by winding. and that the boundary surfaces of the square wire C14) lying on the minimum diameter form an angle equivalent to the pitch angle Cα) to the axis of symmetry of the connection outlet Cl).

3. Connection arrangement according to claim 1, d a d u r c h g e k e n n z e i c h n e t that the wire C14) is formed with a round profile.

4. Connection arrangement according to one of claims 1 to 3, characterized in that the rigid section Cll) of the connection outlet Cl) to the neck part C2) is connected by welding.

5. Connection arrangement according to one of claims 1 to 3. d a d u r c h g e k e n n z e i c h n e t that the rigid section Cll) of the connection outlet Cl) to the neck part C2) is connected by brazing.

6. Connection arrangement according to one of claims 1 to 5, characterized in that the profile elements C16) of the wire C14) lying on the minimum diameter in relation to the axis of symmetry of the connection outlet Cl) are placed on a cone jacket, which cone jacket of the head part C3) to be removed further, and that the cone angle C / 3) of the cone shell is smaller than the self-locking limit value. 3 _° is advantageous.

7. Connection arrangement according to claims 1 to 6. d a d u r ch g e k e n e z e i c h n e t that the wire C14) at its end from the tubular neck part C20) of the tool with a bend C18) in the direction of the generatrix C13) is formed. and that wire C14) is welded to the tubular neck part C20) of the work tool, on which tubular neck part C20) a claw C21) is designed.