WO1991000975A1

WO1991000975A1 - A device for attaching a hose to a tube

Info

Publication number: WO1991000975A1
Application number: PCT/SE1990/000485
Authority: WO
Inventors: Drago Knezevic
Original assignee: Ab Volvo
Priority date: 1989-07-11
Filing date: 1990-07-06
Publication date: 1991-01-24
Also published as: SE464153B; SE8902512L; SE8902512D0; AU6047590A

Abstract

The present invention relates to an arrangement for clamping a hose made of resilient material to one end (1) of a pipe, the end (5) of the hose being fitted over a bead (2) on the pipe-end. According to the invention, the pipe-end includes two mutually opposing recesses (3) which extend slightly inwards on the pipe-end in the longitudinal direction of the pipe and which are intended to accommodate mutually opposing recesses (7) disposed on the hose-end (5) and having a shape complementary to the shape of the recesses on the pipe-end. The bottom of each recess (3, 7) is provided with a through-passing opening and the openings in the recesses are in register with one another when the hose-end is fitted onto the pipe-end. The arrangement also includes a clamping element (11) which extends through the openings and which is tightened with the aid of a suitable mechanism (9), such as to clamp the hose to the pipe.

Description

A Device for Attaching a Hose to a Tube

The present invention relates to an arrangement for attaching a hose made of resilient material to one end of a tube or pipe, by pushing one end of the hose over a bead provided on said one tube-end. The invention is particularly intended to achieve a tight, communicating connection between an air-intake fitted to the resi- liently suspended, tiltable cabin of a truck or lorry and a connecting pipe which is fixedly attached to the chassis of the vehicle with the aid of a resilient pipe-connection which is fixedly connected to the air intake and which is of bellows-like or corrugated con¬ struction over at least a part of its length and the one end of which is intended for connection to a pipe connected to said air-intake and the other end of which is intended for connection to said connecting pipe.

A pipe connection of this kind is, among other things, intended to prevent the ingress of dust, water, snow and the like to the suction air conduit from the air filter of the engine, when the vehicle is in motion. This connection shall enable the suspended cabin to move relative to the chassis, without jeapordizing the tightness or imperviousness of said connection. Fur¬ thermore, that end of the pipe connection which is connected to the connecting pipe shall be capable of being readily detached and connected when tilting or raising the cabin respectively.

There is no requirement for the other end of the pipe connection connected to the air-intake pipe to be read¬ ily detachable. However, it is important that an effec¬ tive seal is maintained under the relatively heavy load to which the pipe connection is subjected over a relatively long period of time.

Normally, the pipe connection has the form of a cor¬ rugated rubber hose and is usually connected to the air-intake pipe by forcing one end of the corrugated hose over the end of the air-intake pipe and by clamp¬ ing said hose-end to said pipe with the aid of a broad pipe-clip. A counter-pressure device or anvil means is arranged internally within the air-intake pipe, to avoid deformation of the pipe when fitting the pipe clip.

This connection between pipe and corrugated pipe- connector is relatively difficult and laborious to effect. Furthermore, the air-intake pipe is not cir¬ cular in cross-section and hence standard pipe clips cannot be used to secure the connection.

The object of the present invention is to provide a connection of the aforesaid kind which will ensure an effective seal while being relatively easy to establish and which is also of simple construction and can there¬ fore be produced at low costs. A further object of the invention is to eliminate the need of special-duty clips or clamps when making such connections.

This object is achieved in accordance with the inven¬ tion in that a device of the kind mentioned in the introduction is characterized in that the pipe-end has formed therein two mutually opposing recesses which extend slightly from the edge of said pipe-end in the longitudinal direction of the pipe; in that the end of said hάse has provided therein mutu-ally opposing re¬ cesses_^which have a shape complementary to the recesses of said pipe-end; in that the bottom of each recess has formed therein a through-passing opening, said openings being in line with one another when the hose is in its intended position on the pipe; and in that a clamping device extends through said openings and is tightened by means of a suitable mechanism such as to clamp the hose to the pipe.

The inventive clamping device ensures that an imper¬ vious or tight connection is obtained between hose and pipe. The inventive device also enables the hose to be given dimensions which will enable it to be easily pushed over the end of said pipe when making the con¬ nection. Thus, the inventive device enables the connec¬ tion between hose and pipe to be readily effected.

Although the inventive quick-clamping arrangement is primarily intended for establishing a connection bet¬ ween a corrogated tubular element and an air-intake pipe, it will be understood that the invention can also be applied in general hose to pipe connections, and in particular with pipes of non-circular cross-section.

So that the invention will be more readily understood, the invention will now be described in more detail with reference to two exemplifying embodiments thereof and also with reference to the accompany drawings, in which

Figure 1 is a side view of a pipe-end configured in accordance with a first embodiment of the invention;

Figure 2 is a sectional view taken on the line II-II in Figure 1; Figure 3 is a side view of a hose-end configured in accordance with a first embodiment of the invention; Figure 4 is a sectional view taken on the line IV- IV in Figure 3; Figure 5 is a side view, partly in section, of a first embodiment of the inventive quick- clamping device in a fitted and tightened state; Figure 6 is a sectional view taken on the line VI-VI in Figure 5; Figure 7 illustrates a pipe-end configured in accor¬ dance with a second embodiment of the inven¬ tion; Figure 8 is a sectional view taken on the line VIII- VIII in Figure 7; Figure 9 illustrates a hose-end configured in accor¬ dance with a second embodiment of the inven¬ tion; and Figure 10 is a sectional view taken on the line X-X in Figure 9.

Figures 1 and 2 illustrate a pipe-end l which is in¬ cluded in a first embodiment of a quick-clamping arrangement according to the invention. This pipe-end has a bead 2 which is intended to hold the end of a hose fitted onto the pipe-end. The arrangement also in¬ cludes two mutually opposing recesses 3 formed in said end of the hose. As will be seen from Figure 2, these recesses have the shape of a truncated V in cross-sec¬ tion and the recesses extend slightly inwards from the edge of said pipe-end in the longitudinal direction of the pipe. In the illustrated embodiment, the bottoms of respective recesses 3 abut one another and therewith stiffen the pipe-end 1. Each recess has provided in the bottom thereof an opening 4, such that the openings of respective bottoms are in mutual alignment. Figures 3 and 4 illustrate a hose-end 5 which is in¬ tended to be fitted onto the pipe-end 1. Similar to the pipe-end, the hose-end 5 is provided with a bead 6 and two mutually opposing recesses 7, the bottoms of which have provided therein an opening 8, said openings being in line with one another. A nut 9 is attached in a suitable manner to the bottom of one recess 7. The recesses 7 are shallower than the recesses 3 of the pipe-end, although said recesses in other respects are complementary in shape to the recesses 3, so that they can be inserted into the recesses 3 on the pipe-end when the hose-end is fitted onto said pipe-end 1.

The hose-end 5 is also configured with a circumferen- tially extending stiffening rib 10, which extends on both sides of the region of the openings 8 of said recesses 7 up to the edge of the hose-end.

Figures 5 and 6 illustrates an established connection between hose-end and pipe-end. The hose-end 5 is fitted onto the pipe-end 1 in a manner such that the openings 4, 8 in the bottoms of respective recesses will lie in register with one another. A bolt 11 is inserted through these openings and screwed into the nut 9. A washer 12 is positioned between the bolt head and the bottom of the corresponding recess in the hose-end. The bolt is tightened sufficiently to bring the bottoms of the recesses 7 in the hose-end within the region of the openings 8 to come into abutment with the bottoms of the recesses 3 in the pipe-end. The rib 10 on the hose- end functions as a clamping band and is tightened when the bottoms of the recesses 7 of the hose-end are drawn down against the bottoms of the recesses 3 in the pipe- end as the bolt 11 is tightened. This ensures that an effective seal is achieved by the connection between hose and pipe.

Because the connection between hose and pipe is sealed effectively by tightening the quick-clamping device, the hose-end 5 can be given dimensions which will en¬ able the hose-end to be fitted easily over the bead 2 on said pipe-end 1. The quick-clamping device also enables the connection between hose and pipe to be readily established and readily dismantled.

The pipe and hose of the embodiment illustrated in Figures 1-6 have an oval cross-sectional shape, which means that the hose-end cannot be pushed -onto the pipe- end without the recesses in said pipe-end and hose-end being positioned opposite to one another. Although this cross-sectional shape is preferred, other cross- sectional shapes are possible, of course, for instance rectangular or circular shapes. If the cross-sectional shape of the pipe and hose is such that the hose can be fitted onto the pipe without the recesses being located opposite one another, the hose-end and pipe-end may conveniently be provided with markings which indicate the manner in which the hose-end should be fitted onto the pipe-end.

Figures 7-10 illustrate a pipe-end and hose-end accord¬ ing to a second embodiment of the invention, the con¬ figuration of said ends being particularly advantageous in those cases where readily dismantable connections are required. Those elements in Figures 7 and 8 which correspond to similar elements in the embodiment il¬ lustrated in Figures 1-6 have been identified with the same reference signs, although with the addition of a prime. Figures 7 and 8 illustrate a pipe-end 1' having recesses 3'. The recesses 3' differ from the recesses 3, of the first embodiment, insomuch as that that part of the recess 3' distal from the edge of the pipe-end is deeper than the remainder of the recess. The open¬ ings 4' in the bottoms of the recesses 3' also have the form of slots which open towards the edge of the pipe- end 1'.

Figures 9 and 10 illustrate a hose-end 5' having reces¬ ses 7'. These recesses differ from the recesses 7 of the first embodiment, insomuch that those parts of the recesses distal from the edge of the hose-end are deeper than the remaining part of said recesses. The openings 8' in the bottoms of the deepest parts of the recesses 7' also consist of through-passing holes in this embodiment. As will be understood, the deep parts of the recesses 1 ' have a configuration complementary to the deep parts of the recesses 3' of the pipe-ends and preferably have a slightly deeper depth than the shallow parts of said recesses 3'. This configuration facilitates assembly of the joint or connection and it is easy to discern when the hose-end has been pushed onto the pipe-end to the assembly position in which the deep parts of the recesses 7' in the hose-end have been inserted into the deep parts of the recesses 3' of the pipe-end.

The purpose of the shallow parts of the recesses 3' in the pipe-end 1' is to enable the hose-end 5' to be pushed easily onto the pipe-end 1', by virtue of the fact that the greatest part of the deep parts of the hose-end recesses 7' can be accommodated in said shal- low parts. As a result, the hose-end 5' need only be expanded to a slignt extent in order for the deep parts of the respective recesses in the pipe-end and hose-end to move one into the other. When the recesses in the hose-end have a shallow depth, a variant is conceivable in which the shallow parts of the recesses in the hose- end or the pipe-end can be omitted. In the case of this variant, the recesses of the pipe-end will also have no particular depth, since it_ shaJL be= possibl to. bring the bottoms of the recesses into mutual abutment when tightening the clamping bolt. In this case, a spacer element is preferably placed between the mutually op¬ posing bottoms of the recesses in the pipe-end, so that said pipe-end is not deformed when tightening said bolt.

The embodiment illustrated in Figures 7-10 enables the connection between hose-end and pipe-end to be made and dismantled in a particularly easy fashion, since as a result of the provision of the slots 4' in the pipe-end of 1', the bolt 11' can be left permanently on the hose-end 5' and, as opposed to the embodiment illus¬ trated in Figures 1-6, need not be removed from the hose-end and pipe-end when the hose-end is to be fitted onto or withdrawn from the pipe-end.

Of course, other clamping elements than screw- threaded bolts can be used to clamp the hose to the pipe. For example, the pipe and hose can be riveted together, wherewith the nut 9 is replaced with a plate capable of beting attached by means of a snap-in connec¬ tion, and a further plate can be snapped-into the bot¬ tom of the other recess. In the case of the embodiment illustrated in Figures 7-10, the clamping mechanism may advantageously have the form of a toggle or excentric mechanism for rapid and simple fitting and dismantling of the connection.

As will be understood, the illustrated embodiments can be modified within the scope of the invention. For instance, the openings in the pipe-end recesses in the first embodiment may have the form of slots instead of holes. Furthermore, the recesses may have a cross- sectional shape different to tha illustrated- and the. clamping mechanism may be of a more complicated kind than the illustrated screw-nut mechanism, particularly in the case of the second embodiment where the mecha¬ nism need not be removed from the hose-end. Neither need the recesses in the hose-end extend to the edge of said end, since it is sufficient to provide the hose- end with recesses in the region of the rib extending circumferentially around the hose-end, i.e. correspond¬ ing to the deep parts of the recesses in the hose-end in the second of the illustrated inventive embodiments. Finally, it will be understood that the clamping arrangement is not restricted solely to the pipe and hose connection recited in the description, but can be used in conjunction with connections where there is a need to establish and dismantle the connection in an easy fashion. The scope of the invention is therefore limited solely by the content of the following Claims.

Claims

1. An arrangement for clamping a hose of resilient material on one end (1, 1') of a pipe or tube, where one end (5, 5') of said hose is pushed over a bead (2) on said pipe-end, c h a r a c t e r i z e d in that the pipe-end (1, 1') includes two mutually opposed recesses (3, 3') which extend slightly inwards of the end-edge of the pipe in the longitudinal direction thereof and which are intended to accommodate two mutu¬ ally opposing recesses (7, 7') provided on the hose-end (5, 5') and having a shape complementary to the reces¬ ses on said pipe-end; in that a through-passing opening (4, 8; 4', 8') is provided in the bottom -of each re- cess, said openings lying in register with one another when the hose-end is positioned on said pipe-end; and in that a clamping element (11, 11') is inserted through the openings and tightened by means of a suit¬ able mechanism (9, 9') such as to clamp the hose to the pipe.

2. An arrangement according to Claim 1, c h a r ¬ a c t e r i z e d in that the recesses (3, 3') in the pipe-end (1, 1') are deeper than the recesses (7, 7') of complementary shape in the hose-end (5, 5').

3. An arrangement according to Claim 2, c h a r ¬ a c t e r i z e d in that the clamping element

(11, 11') is a screw-threaded bolt which coacts with a nut (9, 9') mounted on the bottom of one of the reces¬ ses (7, 7 ' ) in the hose-end.

4. An arrangement according to Claim 2, c h a r ¬ a c t e r i z e d in that the clamping element is a hollow rivet; and in that an anvil plate or washer is attached to the bo tom of each recess in the hose-end.

5. An arrangement according to Claim 3, or 4, c h a r a c t e r i z e d in that the hose-end (5, 5') includes a circumferentially extending rib (10, 10'), which extends on both sides from the recesses (7, 7') of the hose-end (5, 5') within the region of said open¬ ings (8, 8') to the edge of the hose-end.

6. An arrangement according to any one of Claims 1-5, c h a r a c t e r i z e d in that the bottoms of the recesses (3, 3') of the pipe-end (1, 1') are in mutual abutment.

7. An arrangement according to any one of Claims 1-5, c h a r a c t e r i z e d in that a spacer sleeve is disposed between the bottoms of respective recesses of the pipe-end.

8. An arrangement according to any one of the preced¬ ing Claims, c h a r a c t e r i z e d in that the openings (4, 8; 8') in respective recesses (3, 7; 7') of the pipe-end and hose-end are through-passing holes.

9. An arrangement according to any one of Claims 1-7, c h a r a c t e r i z e d in that the openings (4 ' ) of the recesses (3') in the pipe-end (1') are slots which open onto the edge of the pipe-end.

10. An arrangement according to any one of the preced¬ ing Claims, c h a r a c t e r i z e d in that the parts of the respective recesses (7' , 3') of the hose- end (5') and the pipe-end (1') which are distal from the edge of edges of respective hose-end and pipe-end are deeper than the remaining parts of said recesses.