NL7903564A - Full width suction nozzle for industrial cleaner - has inserted sleeve with nylon bearing for manipulator rotary hinge - Google Patents

Abstract

The housing of the suction nozzle of an industrial vacuum cleaner has a cover of synthetic material in the socket of which, a sleeve is inserted to form the rotary hinge of the cranked stub joining the connection to the suction pipe. The sleeve has a nylon bearing for the stub and a spring-loaded locking ring. A number of mutually offset bearing shells of semi-circular cross-section are spaced out along the housing for a cranked shaft operated by an adjusting knob. This regulates the height of the inlet relatively to the running wheels. Between the interchangeable front bristle or rubber rail inserts and the running wheels a space is left for suction along the edges of the housing and the wheels prevent lateral displacement of the inserts. The suction nozzle ensures proper cleaning of the floor up to the wall and whilst being uncomplicated in its design it overcomes the problem of excessive wear on the hinge connection.

Description

ƒ. ι - *

V

VO 7729

Hans Vessel,

Reickshof, Federal Republic of Germany.

Suction nozzle, especially for a commercial vacuum cleaner.

The invention relates to a suction nozzle, in particular for a commercial vacuum cleaner, with nozzle body, rotary joint stub, at the front, height-adjustable running rollers and exchangeable inserts, such as brush strips, rubber profiles or the like.

As is known, suction nozzles for industrial and commercial vacuum cleaners consist of a housing with a rotatably alloyed connecting piece with different diameters for connecting suction pipes, retractable mounted and exchangeable brush strips or rubber strips in the housing. For better guiding over surfaces to be machined, nozzles of this type are provided with rollers, which are adjustable in height by means of an offset wheel bent at the ends of an ora bent arc.

The disadvantages of the known nozzles are in particular the insufficiently clean suction of the edge, i.e. the nozzle cannot get close enough to the plinth of a floor.

In addition, the housing is generally complicated and consists of a number of parts, which must be screwed together or otherwise joined together. The rotary hinge stub is subject to heavy wear and the alloy of the crankshaft through the housing is cumbersome.

The problem underlying the invention is to provide a suction nozzle of the intended type, which does not have the disadvantages as discussed, and which can moreover be mounted simply and quickly. This problem is solved by the measure described in claim 1, while further embodiments are described in claims 2-5,

Further details of the invention are discussed with reference to the drawing. In the drawing: 79 0 3 5 6 4 'J 2 r * - figure 1 shows a top view of the mouthpiece according to the invention; figure 2 shows a bottom view; figure 3 is a partial cross-section over the line 5 III-III of figure 1; figure 4 shows a section through the suction stump according to the line IV-IY of figure 3; figure 5 shows a section through the adjusting element along the line V-V in figure 3> and figure 10 shows a section through the suction nozzle body according to line ΥΙ-1ΓΙ of figure 3 · ....

The suction nozzle consists of a nozzle body 1 made of die-cast aluminum, which is covered at the top with the plastic layer 2, as well as a rotary joint 15.

For better guidance on how to edit it. surface. Two idlers 4 are present, which are held by means of a deflector shaft 5 bent at the ends and are adjustable in height by an adjusting wheel 6. Interchangeable inserts, such as brush strips 7> 7 '> rubber strips 8, 8' or a combination thereof, so-called Rapid strips 9 »9 ', are exchangeable in the nozzle body 1.

The left and right of the plastic covering layer 2 arranged on the connecting stub 10 covers the hollow spaces 11 required by the design to the outside. The position fixation is effected by a back 12 circulating within the mouthpiece body 1. The front and the sides of the cover are designed as a bumper 13 and form an additional position fixation with the back 12.

For attachment to the mouthpiece body 1, two mounting studs 14 are formed on the cover 2, which can be grated into corresponding bores 15 in the mouthpiece body 1. To overcome the undercut in the framing range of the hops 14 in the bores 15, the studs 14 are provided with slots 16.

In order to obtain a higher wear resistance 7903564 5 4 & in the rotary joint stub 3 a groove 18 is formed in the pressing sleeve 17, into which a bearing ring 19 which consists of a split plastic ring of nylon is inserted. groove 20 'for receiving a spring washer 21. It also engages in a groove 22 in the stub 3 and thus absorbs the force which can occur by axial displacement.

For the alloying of the shaft 5 for the rollers 4, bearing shells 25 with semicircles are provided on the nozzle body 1. molded cross-section, with the adjacent bearing shells rotated through 180 °, so that a fixed position for the shaft is guaranteed. This can be easily mounted and retained by inserting and turning regardless of the many deflections. Bolted armies are unnecessary in this way,

The rollers 4 are mounted on the shaft 5 in such a way that they partially delimit the suction channel 24 and allow suction with the front inserts 7 '', 8r, 9 '' along the edge via the remaining opening 25.

The front inserts 71 »8 ', 9' are alloyly slidable into the mouthpiece body 1 on one side and are held by a pivotable mesh 26. The rear inserts 7, 8, 9 are secured against lateral displacement by the rollers 4. For the exchange, the roller is pivoted via the adjusting wheel 6 so that the respective insert can be pushed out.

7903564

Claims (5)

1. Suction nozzle, in particular for commercial vacuum cleaners, with a nozzle body, a rotary hinge stub, height-adjustable side rollers at the front and 5 interchangeable inserts, such as brush strips, rubber profiles or the like, characterized by the combination of the following measures : a) a plastic coating (2) forms the cover of the nozzle body '(1) upwards and in an insertion sleeve (1?) for alloying the rotary joint stub (3) an bearing ring (19) is provided, which has a spring ring ( 21) for the position fixation of the rotary joint stub; b) a number of mutually opposed bearing shells (23) formed on the mouthpiece body (1) with semicircular cross section take one. deepened axle (5) for the locomotive wheel alloy on; c) an opening (25) for the edge extraction remaining between the front inserts (7 ', 8', 9 ') and' the track rollers (4), the track rollers (4) being a limitation against lateral displacement 'of the rear inserts (7, 8,9). Suction nozzle according to claim 1, characterized in that the plastic coating (2) is completely formed with a bumper (13). Suction nozzle according to claim 1, characterized in that for attaching the coating (2) to the nozzle body (1) mounting studs (14) are formed, which are provided in corresponding bores (15) in the nozzle housing (1) and have slots (16) in the framing area of the studs (14) to overcome the undercut. 30 Suction nozzle according to claim 1, characterized in that the bearing ring (19) has a groove (.18) - mounted in a pressing sleeve (17) and split before mounting, and in the groove (20) the spring ring (21) for the position fixation of the rotary hinge receptacle (3). 35 Suction nozzle according to claim 4, characterized in that the bearing ring (19) consists of nylon. 7 9 0 3 5 6 4