FR2735346A1 - TRAY THAT CAN BE DRIVEN IN ROTATION BY MOTOR AND EQUIPPED WITH CLEANING TOOLS FOR A FLOOR CLEANING MACHINE - Google Patents

Abstract

The invention relates more particularly to the rotary mounting of the cleaning tools on such a plate. The underside of the plate (1) has open recesses (3) in which the rotation bearings (4) intended for the cleaning tools (2) are fitted and each comprising a body (5) in the form of a cup fitted into the recess. (3), a ball bearing (6) supported in the body (5), a journal (7) and a bushing (9) of plastic material formed on the part of the journal protruding from the body (5) and on which is locked the tool (2). The faces facing towards each other of the body (5) and the bush (9) form a labyrinth seal and a seal (12) is placed inside. Applicable to floor cleaning machines carrying rotating cleaning tools in the form of discoid brushes and / or polishing discs for example.

Description

DESCRIPTION

  The invention relates to a plate that can be driven in rotation by motor and carrying tools for

  cleaning for a floor cleaning machine, comprising

  More particularly, small cleaning tools in the form of disc brushes, polishing disks or the like which are arranged on the underside of the tray and rotatably supported thereon, the axes of the cleaning tools preferably having an acute angle with them.

  the axis of the plateau and intersecting this axis in a point.

  Such trays are known in the current state

  of the technique. They are ordered and trained in rota-

  motor driven by a floor cleaning machine.

  On the underside of the tray, directed towards the ground or another surface to be cleaned or worked, are supported rotating several small cleaning tools in the form of discoid brushes or polishing discs whose axes of rotation are located on a circle of which the center is crossed by the axis of the turntable. Discoid brushes or similar tools are preferably

  inclined at an angle such as during a rotational movement

  of the tray, the brushes or similar tools obliquely attack the ground or another surface and are themselves

  rotated under the effect of the inclined position

  born. Floor cleaning machines equipped with such

  cleaning tools, are known for example by the

DE 41 40 853 C2.

  On the trays thus equipped, which are known until now, the bearings for the rotational mounting of

  cleaning tools are or are arranged on the inside

  bottom of the board or supported above the board.

  teau. Both provisions have the disadvantage that the bearings in question, frequently made in the form

  ball bearings, are not protected against

  crushing, with the result that the bearings are blocked already after a short period of operation by foreign materials, including fibrous, coming to lodge

  inside, and that their function is no longer guaranteed.

  From this state of the art, the invention

  tion aims to create a plateau that can be trained in

  with a motor and carrying cleaning tools,

  of the type indicated, on which a rota-

  tif requiring low maintenance cleaning tools and

  which guarantees trouble-free operation

a relatively long time.

  The invention provides this result by the fact that

  the lower side of the tray has recesses where-

  greens (blind holes) in which the rotational bearings

  the cleaning tools are nested in such a way

  captive, that the rotation bearings are composed of

  one of a cup-shaped part or part

  killing a bearing body, which is im-

  lost in the recess of the plateau, a clean landing

  said support in the body, a pin fitted into the bearing, and a piece similar to a

  plastic sleeve, which is formed on the end

  free end of the trunnion, end protruding from the body, that the extreme faces directed towards each other of the body and the sleeve are provided with ribs and

  grooves that interpenetrate and form a labyrinth

  rinth, that an elastomer or rubber gasket

  dummy is placed in the body between the landing and the

  mouth cup-shaped body, seal

  which lies radially outwards on the surface

  internal king of the body and radially inside on the trunnion, and that the sleeve carries rigid axial ribs and gated axial locking ribs

  elasticity in the radial direction and on which the

  til cleaning can be threaded and locked by a

  housing drilled and grooved accordingly.

  Thanks to this arrangement, practically a sealed assembly is obtained which requires very little maintenance and

  remains functional for a long time. Each tool of net-

  cleaning (it may be a disc brush or other tool) is easily replaceable after the lock is removed by means of a suitable tool or by hand. The cleaning tool can then be removed from the socket and replaced with another tool or a new tool. The operation with little maintenance is guaranteed especially because the bearing itself is

  protected by the labyrinth seal and the seal

  elastomeric or rubbery dullness, so that fibrous fragments or other foreign matter or liquids can not penetrate into the space o

  find the bearing elements themselves.

  In addition, the combination of rigid ribs and

  elastic ribs on the bushing, ensures a

  in proper rotation of the cleaning tool and

  at the same time the discharge of the locking device.

  It is preferable that the bearing itself is a ball bearing having an inner ring and an outer ring, the first of which is fretted on

the trunnion.

  It is possible and preferable that the body of

  cup-shaped bearing is indelibly

  chable in the recess of the plateau.

  The tray can be made of plastic material

  for example, as the cup-shaped bearing body, which can be made or incorporated during the molding of the tray. It is also possible to paste the

  piece forming the bearing body in the corresponding recess

laying on the board.

  In order to avoid that the connection between the bearing body and the plate is defeated or loosened, it is further provided that the cup-shaped body externally carries radial ribs which penetrate into corresponding grooves of the blind hole. In order to also obtain a safe locking due to manufacturing tolerances, the elastic locking ribs are further provided, on their

  axially distant ends of the bearing, projections

  outward direction, which are bevelled in the direction of placement of the cleaning tool and whose stop edge is inclined so that an angle

  at least slightly obtuse is formed between the

lock and rib lock.

  Other features and advantages of the

  will become clearer from the description

  which follows a non-limiting example embodiment, and the accompanying drawings, in which: - Figure 1 shows schematically only a plate can be rotated and carrying cleaning tools;

  FIG. 2 is a median section of this

  cake; - Figure 3 is an exploded view of the assembly shown in Figure 2; - Figure 4 shows on a larger scale part of Figure 2; - Figure 5 is a side view partially in section of a detail of the rotational assembly; - Figure 6 shows on a larger scale the circled portion VI of Figure 5; FIG. 7 is a view from below of the detail shown in FIG. 5; and - Figure 8 is a cross section of this

  detail, taken along line VIII-VIII of Figure 7.

  The drawings represent a plateau likely

  to be driven in rotation by motor and carrying

  Cleaning tools 2 for a floor cleaning machine.

  More exactly, small cleaning tools 2, in the form of discording brushes, polishing discs or the like,

  are arranged on the lower side of plate 1 and sup-

  rotated on this plate. The axes of the cleaning tools form an acute angle with the axis of the plate 1 and intersect this axis in a fictitious point in the plane of the drawing according to FIG. 2 and at a considerable distance

from the board 1.

  The lower side of the tray has obvious

  open dies 3 in the form of blind holes, in which rotational bearings 4 for the cleaning tools 2 are captively nested. Each of the rotation bearings 4 consists of a part or a

  cup-shaped piece, constituting a body of

  bind 5, which is captively nested in the recess

  3 of the platform 1, of a landing proper 6, sup-

  carried in the body 5, a journal 7 fitted in the bearing 6, as well as a part similar to a sleeve 9 and formed on the free end 8, protruding from the body of

bearing 5, the journal.

  The end faces facing each other of the body 5 and the bushing 9 are provided with ribs and grooves 10, 11 which interpenetrate and form a

labyrinth seal.

  A seal 12 made of elastomer or rubber is placed inside the body 5 between the

  bearing 6 and the mouth of the body and supported - under

  elastic stress - radially outwardly on the inner wall of the body 5 and radially on the inside on

the trunnion 7, 8.

  The sleeve 9 carries three axial ribs ri

  gides 13 uniformly distributed around the periphery and three axial locking ribs 14, evenly distributed around the circumference and endowed with radial elasticity, on which the cleaning tool 2 can be threaded and locked by a pierced housing 15

and grooved accordingly.

  The bearing 6 is a ball bearing having an inner ring and an outer ring, the

  The first ring is hooped onto the journal 7. The outer ring

  The bearing body 5 in the form of a cup is preferably fixed indetachably in the recess 3 of the plate 1, the body 5 having a cup-shaped bearing body 5. radial ribs 17 penetrating into corresponding grooves 18 of the hole

  blind 3 and thus preventing relative rotation.

  The elastic locking ribs 14 pre-

  feel, at their axial ends distant from the wheel-

  6, protrusions 18 directed outwards

  and beveled in the direction of placement of the

  cleaning tool 2 (bevel 19). This bevel 19 serves to facilitate

  liter the inlet of the socket in the housing of the cleaning tool 2 to the establishment of it. Each projection forms at the rear a stop edge 20 having an inclination such that an obtuse angle is formed between this

  edge and the corresponding locking rib 14.

  This arrangement makes it easy to compensate for

  manufacturing loses, so that a secure lock

  is also obtained in the presence of such tolerances.

  The invention is not limited to the example of

  realization which has just been described and many

  are possible within the framework defined by

present memory.

  All new features, individual

  dual and combined, contained in the description and / or

  shown in the drawings, are considered essen-

to the invention.

Claims (5)

  1. Tray that can be rotated by motor and carrying cleaning tools for a   floor cleaning machine, more particularly comprising   small cleaning tools in the form of disc brushes, polishing disks or the like which are arranged on the underside of the tray and rotatably supported thereon, the axes of the cleaning tools preferably having an acute angle with the axis of the plate and intersecting this axis in a point, characterized in that the lower side of the plate (1) has open recesses (3) (blind holes) in which the bearings of   rotation (4) for the cleaning tools (2) are fitted   the rotational bearings (4) consist each of a cup-shaped part or part constituting a bearing body (5), which is   captively fitted into the recess (3) of the   water (1), a bearing (6) itself supported in the body (5), a pin (7) nested in the bearing (6),   as well as a piece similar to a socket (9) in   plastic surface, which is formed on the free end (8) of the trunnion, which end protrudes from the body (5), than the end faces directed toward each other of the body (5).   and the bushing (9) are provided with ribs and rim.   intersecting and forming a labyrinth seal, an elastomeric seal (12)   rubbery material is placed in the body (5) between the   bind (6) and the mouth of the cup-shaped body, seal which rests radially on the outside   on the inner wall of the body (5) and radially to the   on the trunnion (7), and that the sleeve (9) carries rigid axial ribs (13) and axial ribs   latch (14) with elasticity in the direction of   and on which the cleaning tool (2) can be threaded and locked by a pierced housing (15) and grooved accordingly.   2. Tray according to claim 1, characterized   characterized in that the bearing (6) is a ball bearing having an inner ring and an outer ring, the inner ring of which is engaged on the trunnion (7).   3. Tray according to claim 1 or 2,   characterized in that the cup-shaped bearing body (5) is undetachably fixed in the recess (3) of the tray (1).   4. Tray according to one of claims 1 to 3,   characterized in that the cup-shaped bearing body (5) externally carries radial ribs (18).   penetrating into corresponding grooves in the recess (3) in the form of a blind hole.   5. Tray according to one of claims 1 to 4,   characterized in that the resilient axial locking ribs (14) have stop protrusions (18) on their axial ends remote from the bearing (6), outwardly directed and beveled projections   in the direction of setting up the net tool   the stop edge (20) is inclined so that at least a slightly obtuse angle is formed   between this edge and the locking rib (14).