WO2014044980A1

WO2014044980A1 - Suction unit for mobile work equipment and devices

Info

Publication number: WO2014044980A1
Application number: PCT/FR2013/052169
Authority: WO
Inventors: Marc Bottazzi
Original assignee: M.B.H. Developpement
Priority date: 2012-09-19
Filing date: 2013-09-19
Publication date: 2014-03-27
Also published as: CN104640489A; FR2995545B1; EP2897514B1; US20150219107A1; EP2897514A1; FR2995545A1

Abstract

The invention relates to a suction unit for mobile work equipment and devices, said equipment including a platform (1) having a rolling means supporting a vessel (3), holding the suction unit (A), an opening (B) for positioning the pipe connected to the work tool, and an air intake (4) in the median portion of the vessel, said suction unit including three vertically adjacent, assembled components (6), (7) and (8) — top, intermediate and bottom — arranged for circulating air, the bottom bowl-shaped component (8) having bore-holes (8.2) for passing air from the bottom upward, the intermediate component (7) being supported by the bottom component (8) and having a central opening (7.1) for positioning the bottom ring-shaped portion (10.1) of a motor-turbine unit (10) mounted on and attached to a supporting plate (11) secured to the intermediate plate-shaped component (7), said ring shape having openings (10.2) for passing air, the top bell-shaped component (6) being positioned above the components (7) and (8) and having, in the top end wall thereof, openings (6.1) for passing air, said component (6) defining an inside space with the component (7) for receiving the top portion (10.3) of a motor-turbine unit (10), said suction unit (A) being characterised in that the components (6), (7) and (8) define a single circuit (CC) for circulating air, performing the dual function of air suction and of ventilating and cooling the motor-turbine unit; in that the components (7) and (8) are assembled with a sealed peripheral link (16); in that the intermediate plate of the component (7) defines a passage (15) with the circular supporting plate (11), supporting the motor-turbine unit; in that the suctioned air, drawn via the air intake (4) formed on the vessel, crosses the filtering system (9), passes into the bottom portion of the motor-turbine block consisting of the ring-shaped portion (10.1), and then passes into the passage openings (15) guiding the air into the inside space defined by the bell-shaped component (6) and the component (7), thus ensuring the ventilation of the motor-turbine unit; in that the air is discharged via the openings (17) formed in the top portion of the bell; and in that the motor-turbine unit is a high-frequency or brushless motor.

Description

SUCTION CENTER FOR

ROLLING WORK EQUIPMENT AND EQUIPMENT

The invention relates to the technical sector of rolling stock equipped with industrial vacuum cleaners for the execution, using various types of tools, sanding, grinding, drilling, on walls, walls, ceilings, floors of buildings under construction.

The invention is also related to the technical sector of materials and equipment for suction of dust, waste and others.

The Applicant has been operating satisfactorily for many years rolling work equipment incorporating suction units in combination with sanding equipment, grinding, such as hand sander. There is thus illustrated in the prior art in Figures 1, 2, 3, 4 and 5 a suction plant used, manufactured and marketed by the Applicant. The rolling work equipment is thus referenced as a whole by (E) and comprises a platform (1) with rolling means (2) receiving a cylindrical vessel (3) on which is positioned the suction unit (A). ). An air inlet (4) is formed in the middle part of the tank. The suction unit (A) is attached and fixed on the upper part (3a) of said tank being fitted and fixed in any appropriate manner by means of clamp (5) or equivalent. It is represented by (B) the positioning mouth of the pipe associated with the working tool (not shown) allowing in operation the suction of dust, waste and various detritus in the tank (3). FIGS. 2 and 5 thus illustrate the suction unit in its known design which consists of three superimposed and assembled components (6) (7) (8), respectively upper, intermediate and lower, defining two circulation circuits. independent air, one air suction (AA), and the other ventilation and cooling (BB) of the engine. The lower component (8) is configured as a bowl and is made of molded plastic. It is capable of receiving on its underside by ensuring its quick-mounting and interchangeable mounting a suction filter (9) of cylindrical configuration for the passage of air from the circuit (AA) from the air intake (4). ) arranged on the cylindrical tank (3). This bowl-shaped component (8) has in its bottom (8.1) perforations (8.2) for the passage of air from bottom to top. An intermediate element (7), also made of molded plastic, in the form of a circular plate is able to bear against the lower component (8). This tray form has a central opening (7.1) circular to allow the positioning of the ring-shaped lower portion (10.1) of a motor-turbine unit (10) mounted and fixed on said plate (7). This engine-turbine unit is thus mounted on a circular support plate (1 1) which comes to seal bearing on the lower face of the intermediate plate by means of a peripheral seal (12). Said lower ring shape of the motor-turbine unit surrounds the openings (8.2) formed in the lower part of the bowl-shaped component (8) to guide the passage of the suction air. The ring portion of the engine-turbine unit has radial slots (10.2) for passage and evacuation of the suction air. The intermediate component (7) is in partial peripheral support on the bowl-shaped component (8) so that the suction air (AA) can circulate along the arrow (Fl) shown in the drawings and exit outside of the central vacuum. It can be provided as shown in FIG. 2 a baffle configuration (13) within the ring for the circulation of the suction air, and this, in known manner. The upper component (6) is shaped bell-shaped, also molded plastic, and is positioned above the components (7) and (8). This component (6) thus defines an interior volume with the component (7) for receiving the upper part (10.3) of the motor-turbine unit (10). The component (6) has in its upper bottom openings (6.1) for introducing the ventilation air and cooling the engine. Passages (14) are provided between the components (6) and (7) for evacuation of the ventilation air according to the circuit (BB) identified by the arrow (F2) shown in FIG.

In this implementation according to the prior art, it is therefore the realization of two independent circuits with two different air supply sources and different functions. In this known implementation, the implementation of the engine-turbine group is made in the form of a universal motor which requires to be ventilated from the inside and can not be ventilated by the suction of air. This first generates head losses and also the operation of the turbine engine with very high speeds and the production of noise. Since the suction air is polluted and the universal motor has to be cooled between the rotor and the stator, its heating causes a significant heating. The longevity of such a motor-turbine group is of the order of 3,000 hours with an observed wear of the brushes and a deterioration of the collector. In addition, a leakage problem must be solved between the two air circuits (AA) and (BB). For information, the speed of rotation of the engine-turbine group is of the order of 28,000 revolutions / minute.

The Applicant's approach was therefore to reflect on these different issues and to seek a solution that brings a better comfort in use with noise reduction, better power output of the aspirant group, and reduced costs.

The solution provided by the Applicant perfectly meets the disadvantages of the prior art.

According to a first characteristic, the suction unit for equipment and rolling work equipment, said equipment comprising a platform with rolling means receiving a tank, receiving the central vacuum, a positioning mouth of the pipe associated with the tool an air inlet in the middle part of the tank, said suction unit comprising three superimposed and assembled upper, intermediate and lower components, arranged for air circulation, the lower bowl-shaped component having perforations for the passage of air from bottom to top, the intermediate component bearing on the lower component and having a central opening for the positioning of the ring-shaped lower part of a motor-turbine unit mounted and fixed on a support plate secured to the intermediate tray-shaped component, said ring-shaped form having open ures for the passage of air, the bell-shaped upper component being positioned above the components and having openings in its upper bottom for the passage of air, said component defining an interior volume with the component for the receiving the upper part of a motor-turbine unit, said suction unit is remarkable in that the components define a single air circulation circuit ensuring the dual function of air intake and ventilation and of cooling the motor-turbine unit, and in that the components are assembled with a sealed peripheral connection, and in that the intermediate plate of the component defines a passage with the circular support plate, support of the engine-turbine unit, and in that the air drawn in, called by the air intake formed on the tank passes through the filtering system, passes in the lower part of the engine-turbine block constituted by the ring portion and then passes through the passage openings guiding the air into the interior volume defined by the bell-shaped component and the component by providing ventilation of the engine-turbine unit, and that the air is exhausted by the mouths formed in the upper part of the bell, and in that the motor-turbine unit is a high frequency motor or brushless motor.

These and other characteristics will be apparent from the rest of the description.

For fixing the object of the invention illustrated in a nonlimiting manner to the figures of the drawings where:

Figure 1 is a schematic view illustrating a suction unit mounted on a rolling carriage in a known manner.

- Figure 2 is a schematic view of the suction unit according to the prior art with its various components and with the definition of two air circuits on the one hand air intake and on the other hand ventilation and cooling of the power unit.

- Figure 3 is a partial view of the outside according to the prior art of the suction unit mounted with the illustration of the two air circuits.

Figures 4 and 5 are partial views illustrating the mounting of the suction unit shown in Figures 2 and 3 to show the positioning of the components 6, 7 and 8 of said plant.

Figure 6 is a schematic view of the suction unit according to the invention with the implementation of a single air circulation circuit (CC) identified according to the arrow (F3).

Figures 7 and 8 are partial views illustrating the mounting of the suction unit according to the invention and its various components.

In order to make the object of the invention more concrete, it is now described in a nonlimiting manner illustrated in the figures of the drawings.

For a good understanding of the invention, the same references will be used to identify the same components.

Referring to FIGS. 6 to 8 more particularly, the invention implements the same three components (6) (7) (8) of the central vacuum unit but with the implementation of a single circuit ( CC) which provides the dual function of air intake and ventilation and cooling of the engine-turbine unit. This arrangement is made possible by the removal of the peripheral sealing gasket (12) between the component (7) and the component (8), and on the other hand, sealing the peripheral connection (16) between the components (7) and (8) above when joining them. The intermediate plate constituting the component (7) thus leaves a passage (15) with the circular support plate (1 1), support of the engine-turbine group. Thus, the air flow (CC) is as shown in FIG. 6, that is, the air drawn by the air intake (4) formed on the tank (3) passes through the filtering system (9). then passes into the lower part of the engine-turbine unit constituted by the ring portion (10.1), then passes through the passage openings (15) thus bringing the air into the interior volume defined by the bell-shaped component (6) and the component (7). The engine-turbine unit is thus ventilated and the air is discharged through the mouths (17) formed in the upper part of the bell, and in particular in the connection and superposition zones between the components (6) and (7). The solution provides advantages in that it allows the use of a high frequency or brushless motor that is ventilated by the aforementioned air flow, and this, sufficiently. Since the engine is externally cooled, the cooling air may be contaminated with particles smaller than 1 micron. The efficiency of the suction is better, since according to the tests carried out, it is between 70% and 95%. Implementation is easier. The choice of the engine-turbine group is important with a reduction of costs.

Claims

R E V E N D I C A T IO N S

-1- Suction plant for rolling stock equipment and equipment, said equipment comprising a platform (1) with rolling means receiving a tank (3), receiving the central vacuum (A), a mouth (B) of positioning of the pipe associated with the working tool, an air inlet (4) in the middle part of the tank, said suction unit comprising three superimposed and assembled components (6) (7) and (8) upper , intermediate and lower, arranged for the circulation of air, the lower component (8) in the form of a bowl having perforations (8.2) for the passage of air from bottom to top, the intermediate component (7) being supported on the lower component (8) and having a central opening (7.1) for positioning the ring-shaped lower part (10.1) of a motor-turbine unit (10) mounted and fixed on a support plate (1 1) secured to the intermediate plate-shaped component (7), adite ring shape having openings (10.2) for the passage of air, the upper component (6) shaped bell positioned above the components (7) and (8) and having in its upper bottom openings (6.1) for the passage of air, said component (6) defining an interior volume with the component (7) for receiving the upper part (10.3) of a motor-turbine unit (10), said central unit suction (A) being characterized in that the components (6) (7) and (8) define a single air circulation circuit (CC) ensuring the dual function of air intake and ventilation and for cooling the engine-turbine unit, and in that the components (7) and (8) are assembled with a sealed peripheral connection (16), and in that the intermediate plate of the component (7) defines a passage (15) with the circular support plate (1 1), support of the motor-turbine group, and that the air sucked in, called by the air intake (4) formed on the tank passes through the filtering system (9), passes into the lower part of the engine-turbine unit constituted by the ring portion (10.1) and then passes through the passage openings (15) guiding the air into the interior volume defined by the shaped component. bell (6) and the component (7) providing ventilation of the engine-turbine unit, and in that the air is discharged through the mouths (17) formed in the upper part of the bell, and in that the power unit - turbine is a high frequency or brushless motor.