FI112178B - Brush head attachment method to drive shaft shaft and outer casing - Google Patents

Description

5,112,178

BRUSH MOUNTING METHOD USING THE SHAFT SHAFT AND ITS OUTSIDE

The present invention relates to a bristle brush mounting method according to the preamble of claim 1 for use in the shaft of the drive shaft and its outer casing for use in cleaning interior air ducts.

This patent application mainly deals with a cleaning device for cleaning air ducts. The device consists of a flexible drive shaft with a non-rotatable housing and a rotating shaft inside. The shaft is rotated at one end most commonly by means of a drill, whereby the brush attached to the opposite end of the shaft rotates. The drive shaft is manually pushed into the ventilation duct while the brush is rotating, generally the drive shaft is not very long, e.g., 6-20 meters, rarely longer.

The unit is manually pulled out of the ventilation duct. The advantage of the machine over motor drives is that it only needs a drive shaft, a drill and brushes for easy cleaning. The equipment is mainly used for detached, terraced, office and office buildings, as well as industrial facilities.

In current cleaning devices, the brush is made using a wire formed in the center of the brush, to which the bristles are attached between the threads. The structure of the brush is similar to that of a household bottle brush 30. The brush metal thread extends well from both ends of the brush, *. outside. The brush is attached to a special hexagonal 17 mm key slot. Inside the sleeve is a through hole with one attached at one end! a rotary inner axis of the drive shaft and an inner bore at one end thereof the thread has a brush attached.

35 'In the current brush described above, and its method of attachment, the drawback is that when the shaft of the drive shaft breaks, the brush and its attachment part are so-called. the sleeve remains in the air duct to be cleaned. Removal of the brush and its attachment sleeve is extremely slow, the drive shaft has to be pulled ", 40 and then generally dismantled the ventilation duct. Disassembly of the duct t" ·. Usually also requires the dismantling of the intermediate floor, disassembly is also slow. slow, often also some of the materials are damaged during disassembly, necessitating the purchase of new materials.The disassembly and assembly of the duct described above is extremely expensive due to the high working time and raw materials.

5 2 112178

A further disadvantage of current cleaning devices is that the shaft of the drive shaft slips in the brush mounting sleeve, whereby the brush does not rotate so-called. slips and finally drops into the duct without breaking the shaft, which necessitates the above operations. A further disadvantage is that the shaft breaks so-called. which happens, for example, near the longitudinal center of the drive shaft, whereby the entire shaft has to be replaced if a spare part is available.

It is an object of the invention to provide a method of attaching a brush head to the drive shaft shaft and its outer casing to provide a cleaning device that eliminates the need to disassemble the ventilation ducts since the broken shaft and brush end are trapped in the drive shaft.

20

The foregoing disadvantages can be overcome and the objects are achieved by the method of fastening the brush head to the shaft of the drive shaft and to the outer casing thereof, which is characterized by what is defined in the characterizing parts of the claims.

25

The main advantages of the invention are that the brush and the brush head do not remain in the ventilation duct when the shaft of the drive shaft (rotation shaft) is broken. A further advantage is that a bend (fold) is formed on the shaft pressed by the locking screw of the shaft, which acts as the weakest point of the shaft, whereby the shaft always breaks at the said bend when concealed, resulting in shortening the shaft by only a few centimeters. A very important improvement is also that you-. this bend of the shaft prevents it from slipping at the brush head. When the drive shaft of the invention is broken, the drive shaft shell is shortened and the broom end is assembled, after which the work can be continued.

'... * 35 It is clear from the foregoing that the use of the invention provides significant cost savings.

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The invention will now be described in detail in the accompanying drawings, * ·. Referring to.

i t. '··. 40

Figure 1 shows a sectional view of a brush head attachment method '·' · in accordance with the invention, partially cut away and perpendicular to the shaft of the drive shaft and its outer sheath.

. . Fig. 2 shows a top part 5 3 112178 2b of the method of attaching the brush head according to Fig. 1, cut away and perpendicular to the side.

Fig. 3 shows the inner part 2a 10 of the method of attaching the brush head according to Fig. 1 in section and viewed from the side.

The method of attaching the brush head to the shaft of the drive shaft and its outer casing shown in Figures 1, 2 and 3 has the following parts and locations. Drive shaft 1 with shell 1a, shaft Ib, brush side le, brush end 2 with inner part 2a top 15 lysosa 2b bearing locking member 2c, shaft locking member 2c, bender 2e, retainer 2f, hole 2g, shaft hole 2h and retaining member 3.

For the presently disclosed method of attaching the brush head to the drive shaft shaft and its outer casing, it is inventive for the brush head 2 to be indirectly or 20 rotatably mounted by one or more retaining members 3 on the drive shaft 1 casing 1a which prevents the shaft from disengaging the brush member 2. is that the shaft Ib is bent by a bender 2e at the brush head 2, whereby the shaft Ib cannot slip or rotate freely so that the brush head 2 does not rotate.

The drive shaft 1 is known in the prior art for cleaning ducts for air conditioning ducts.

The brush head 2 is round in appearance and incorporates all the most common brushes currently on the market.

30

The invented brush end 2 has a circular inner part 2a, which has a drill in its center at the end of the drive shaft 1 and an internal thread for engaging the housing 1a of the drive shaft 1. The inner part 2a does not rotate during cleaning of the air duct. The crest-side end 35 of the inner part 2a has a hole slightly larger than the axis Ib so that the axis Ib can freely rotate inside it.

It is inventive that the inner part 2a of the brush head 2 has one or more retaining means 2f which prevent the retaining member 3 from moving over the inner part 2a. The retainer 2f muo-40 is formed by a shoulder in the inner part 2a against which the brush end of the retaining member 3 rotates. The retaining member 3 may be a plain bearing, in the form of a tube having a short shape, the inner and end surfaces of which act as a sliding surface of the inner member: / · 2 a v a s t e n.

. . The top part 2b of the brush head 2 is also circular when viewed from the end, it rotates on the inner part 2a and has a center hole for the axis Ib from which the axis Ib passes. The shaft Ib is secured by a shaft locking member 2d, which is most preferably a hex screw. The cover portion 2b has one or more locking members 2c of the retaining means 3, most preferably a hexagonal screw for locking the cover portion 2b to the holding member 3, whereby the retaining member 3 rotates with the cover portion 2b as a bearing on the cover portion 2b. The cover portion 2b also has a bender 2e which is most preferably a hex screw which presses the shaft Ib obliquely. The upper end portion 2b of the brush head 2 has a longitudinal center at its bender 2e 15 having a bore substantially larger than the axis Ib allowing bending of the axis Ib.

Preferably, the retaining member 3 may be a sliding bearing, a needle bearing. Further, the retaining member 3 may preferably be a flexible locking ring, such as, for example, a Seger or a pin 20, an Allen screw or the like.

The retaining member 3 may consist of a portion attached to the drive shaft 1 by its housing 1a against which the top part 2b of the brush head 2 rotates. Em. in the solution, the cover part 2b consists of a single press-fit, two or more removable and fastening parts, each of which has a so-called "press-in" part. in the housing the retaining member 3 is located. The cover portion 2b rotates about the retaining member 3 and the retaining member 3 prevents it from being disengaged from the drive shaft 1. The retaining member 3 is secured to the housing 1a of the driving shaft 1 by means of an internal thread so that it does not rotate.

Most preferably, all parts of the brush head 2 of the present invention can be made of known metals such as aluminum, brass, steel, stainless steel or the like, and plastics. The manufacturing can be carried out by known manufacturing methods and machines.

: 35 The device according to the invention is used like other previously known brushes for cleaning air ducts.

It will be apparent to one skilled in the art that the invention is not limited to the following embodiments, but that many modifications are possible within the scope of the inventive idea as defined by the appended claims.

I · »*«

Claims (11)

A method of attaching a brush head to the drive shaft shaft and its outer casing, the brush head (2) being part of an air duct cleaning device used for internal cleaning of the air ducts, the cleaning device having a flexible drive shaft (1) for rotating the cleaning brush ) rotates the brush, at the opposite end of the brush, e.g. by means of a drilling machine, characterized in that the brush head (2) is rotatably or directly fixed 15 by one or more retaining means (3) on the housing (1a) of the drive shaft (1) the retaining member (3) prevents the brush head (2) or its part from coming off the drive shaft (1) when the shaft breaks. 2. Fästningsförfarande för en Axel à drivaxel och för dess yttermantel à borstända enligt patentkrav 1, kännetecknat av att stopporganet (3) mest fördraget utgörs av ett glidlager, ett nällager. The method of attaching the brush head to the drive shaft shaft and its outer casing according to claim 1, characterized in that the retaining member (3) is preferably a sliding bearing, a needle bearing. 3. Fästningsförfarande för en Axel än drivaxel och för dess yttermantel än borstända enligt patentkrav 1, kännetecknat av att stopporganet (3) är företrädesvis en flexibel läsring, säsom t.ex. en segerring eller en sprinttapp, en sexkantshälskruv eller motsvarande. 3. The method of attaching the brush head to the drive shaft shaft and its outer casing according to claim 1, characterized in that the retaining member (3) is preferably a flexible locking ring, such as a Seger ring or a cotter pin, hexagon screw or the like. 4. Fästningsförfarande för en Axel på drivaxel och för dess yttermantel på borstända enligt patentkrav 1, kännetecknat av att stopporganet (3) bestär av et runt parti som har fästs vid drivaxelns (1) motsa parti ett yttre. (2b) av borständan (2) roterar. The method of attaching the brush head to the drive shaft shaft and its outer casing according to claim 1, characterized in that the retaining member (3) is formed by a circular portion attached to the drive shaft (1a) against which the brush head (2) rotates. 5. Fästningsförfarande för en Axel än drivaxel och för dess yttermantel än borstända enligt patentkrav 1, kännetecknat av att i ett inre parti (2a) av borständan (2) förekommer en eller flera spärr (2f) som hindrar stopporganet att förflyttas i längdriktningen frän det inre partiet (2a). The method of attaching a brush head according to claim 1 to a drive shaft. The shaft and its outer casing are characterized in that the inner part (2a) of the brush head (2) has one or more retaining means (2f) which prevent longitudinal movement of the retaining member (3) from the inner part (2a). 5 5 112178 Vol 6. Fästningsförfarande för en Axel über drivaxel och för dess yttermantel een borstända enligt patentkrav 5, kännetecknat av att spärren (2f) bestar av et anslag i det inre partiet (2a), mot whistle anslag den mot borsten belägna ändan 3) Roterar. 8 112178 6. The method of attaching the brush head to the shaft of the drive shaft and to the outer casing thereof according to claim 5, characterized in that the stopper (2f) is formed by a pension 40 in the inner part (2a), against which the end of the stopper (3) rotates. :: 7. A method for attaching a brush head according to claim 1 to a drive shaft. The shaft and its outer casing are characterized in that the retainer (2f) is a ring,,, 45, which prevents the holding member 5 6 112178 (3) being displaced longitudinally from the drive shaft (1) on the housing (1a). 7. Fästningsförfarande för en Axel à drivaxel och för dess yttermantel à borstända enligt patentkrav 1, kännetecknat av att spärren (21) utgörs av en ring som hindrar stopporganet (3) ovan horn (la) av drivaxeln (1) frän i längdriktningen ovanifrän drivaxeln (1). 8. Fästningsförfarande för en Axel päen drivaxel och för dess yttermantel päen borstända enligt patentkrav 1, kännetecknat av att det yttre partiet (2b) bestär avä eler flera delar som kan lastag frän varandra eller fästas vid varandra, in. see hus stopporganet (3) befinner sig, varvid det yttre partiet (2b) roterar kring stopporganet (3) och stopporganet (3) hindrar det yttre partiet frän att lossnas frän drivaxeln (1). 8. The method of attaching the brush head to the drive shaft shaft and its outer casing according to claim 1, characterized in that the cover part 2b consists of two or more removable and fastening parts, each of which has a so-called. in the housing, the retaining member 3 is disposed so that the cover member 2b rotates about the retaining member 3 and the retaining member 3 prevents it from being disengaged from the drive shaft 1. 15 9. Fästningsförfarande för en Axel päin drivaxel och för dess yttermantel päst borstända, kännetecknat av att axeln (Ib) har böjts med hjälp av en bockare (2e). A method of attaching the brush head to the drive shaft shaft and to its outer casing, characterized in that the shaft (Ib) is bent by a brush (2e) at the brush head (2). 10. Fästningsförfarande för en Axel päen drivaxel och för dess yttermantel päen borstända enligt patentkrav 8, kännetecknat av att bockaren (2e) mest fördraget är en sexkantshälskruv som trycker axeln (Ib) snett. The method of attaching the brush head to the drive shaft shaft and its outer casing according to claim 8, characterized in that the bender (2e) is preferably a hexagonal screw which presses the shaft (Ib) obliquely. The method of attaching the brush head to the drive shaft shaft and its outer casing according to claims 8 and 9, characterized in that the top part (2b) of the brush head (2) has a bore substantially larger than the shaft (Ib) at the bender (2e). (Ib) bending. 7 112178 1 .Faestningsförfarande för en Axel pä en drivaxel och för dess yttermantel pä en borstända, varvid borständan (2) utgör en del av hanköringsanordning i en ventilationskanal, franken rotöringsanordning används för en invänning röring av ventkankan 1) för drivning av en rengöringsborste, vilken borste drivs t.ex. med hjälp av en borrmaskin frän den motsatta av borsten med en axel (ib) som befinner sig inne i la rsan (la) av den böjliga drivaxeln (1), kännetecknat av att borständan (2) har fästs med ett eller flera stopporgan (3) ) vid hullsan (la) av drivaxeln (1) och flash stopporgan (3) hindrar borständan (2) eller en del av den frän att lossna frän drivaxeln (1) om axeln bryts. 11. Fästningsförfarande för en Axel päen drivaxel och för dess yttermantel pä en borstända enligt patentkraven 8 och 9, kännetecknat av att i det yttre partiet (2b) av borständan (2) i dess längdriktade nav vid bockars (2e) finn är väsentligen större än axeln, borken möjliggör böjningen av axeln (Ib).