SE1150864A1 - Betongsglättare - Google Patents
Betongsglättare Download PDFInfo
- Publication number
- SE1150864A1 SE1150864A1 SE1150864A SE1150864A SE1150864A1 SE 1150864 A1 SE1150864 A1 SE 1150864A1 SE 1150864 A SE1150864 A SE 1150864A SE 1150864 A SE1150864 A SE 1150864A SE 1150864 A1 SE1150864 A1 SE 1150864A1
- Authority
- SE
- Sweden
- Prior art keywords
- battery
- rotor assembly
- trowel
- powered
- electric motor
- Prior art date
Links
- 230000007246 mechanism Effects 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 230000000712 assembly Effects 0.000 description 4
- 238000000429 assembly Methods 0.000 description 4
- 239000002828 fuel tank Substances 0.000 description 2
- 238000009499 grossing Methods 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 238000004091 panning Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F21/00—Implements for finishing work on buildings
- E04F21/20—Implements for finishing work on buildings for laying flooring
- E04F21/24—Implements for finishing work on buildings for laying flooring of masses made in situ, e.g. smoothing tools
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F21/00—Implements for finishing work on buildings
- E04F21/20—Implements for finishing work on buildings for laying flooring
- E04F21/24—Implements for finishing work on buildings for laying flooring of masses made in situ, e.g. smoothing tools
- E04F21/245—Rotary power trowels, i.e. helicopter trowels
- E04F21/247—Rotary power trowels, i.e. helicopter trowels used by an operator sitting on the trowel, i.e. ride-on power trowels
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Road Paving Machines (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
PGl9644SEOO St PGl9644USOO ABSTRACT Concrete tinishing trowei (10) comprising at ieast one rotor assembly (12) comprising arotor shaft (18) with at least one rotor blade (14) for finishing newly-laid Concrete. The at ieast one rotor assembly (12) is driven by at least one battery-powered electric motor (20). (Pig. 1)
Description
PGl9644SEOÛ & PGl9644USOO CONCRETE FINISHING TROWEL A TECHNICAL FIELD The present invention concerns a Concrete finishing trowel for finishing newly-laid (i.e. un-cured) Concrete before or while it is curing/hardening. The Concrete finishing trowelincludes at least one rotor assembly comprising a rotor shaft with at least one rotor bladethereon for finishing newly-laid Concrete, whereby the at least one rotor assembly is driven by at least one motor.BACKGROUND OF THE INVENTION A Concrete finishing trowel (also known as a “power float", “power trowel” “helicopter”,“trowel machine", “Concrete finisher" or “Concrete floor finisher”) is used to apply a smoothfinish to Concrete. The Concrete finishing trowel can be a riding trowel that is used by anoperator sitting on a seat on the machine, or a walk-behind trowel that is used by an operator walking behind the machine.
Riding trowels typically include a self-propelled mobile frame including a deck. At leasttwo rotor assemblies are mounted on an underside of the deck. Each rotor assemblyincludes a driven shaft extending downwardly from the deck and a plurality of trowelblades mounted on and extending radially outwardly from the bottom end of the drivenshaft and supported on the surface to be panned and finished. The weight of the ridingtrowel and the operator is transmitted frictionally to the underlying surface by the rotatingblades, thereby smoothing the underlying surface. The driven shafts of the rotorassemblies are driven by one or more diesel- or petrol-driven engines mounted on theframe and typically linked to the driven shafts via a worm gear mechanism or hydraulic mGaïlS.
For example, US patent no. 6 250 844 concerns a Concrete finishing trowel that has oneor more driven rotor assemblies Coupled to a gasoline-powered internal cornbustion via atorque transfer system. The torque transfer system includes at least one flexible shaft,such as a flexible wound wire shaft. The flexible shaft bends to accommodate tilting movement of the associated rotor assembly that occurs upon a steering operation.
PG19644SEOO & PGl9644USOO Such a rotor drive system comprising a gasoline-powered internal combustion enginemakes the riding trowel noisy to use, and worm gear mechanisms give rise to substantial power losses in the rotor drive system.SUMMARY OF THE lNVENTlON An object of the invention is to provide an improved Concrete finishing trowel for finishing newly-laid (i.e. un-cured) concrete before or while it is curing/hardening.
This object is achieved by a concrete finishing trowel (i.e. a riding trowel or a walk-behindtrowel) comprising at least one rotor assembly comprising a rotor shaft with at least onerotor blade for finishing (i.e. panning and finishing or just finishing (smoothing andpolishing and/or grinding and/or washing) a surface mounted thereon, whereby the at least one rotor assembly is driven by at least one battery-powered electric motor.
An electric motor is much quieter, cleaner, lighter and less bulky than a diesel- or petrol-driven motor, it requires no fuel tank and does not produce any exhaust fumes and it hasa much higher torque than a diesel- or petrol-driven motor. By supplying electrical powerthe at least one motor from batteries instead of cables, no cables will trail the riding trowel.A trailing cable can limit the movement of the riding trowel, damage the surface beingsubjected to a finishing treatment, and get twisted around the rotor blades of the riding trowel.
The at least one battery-powered electric motor is preferably a multi-speed motor, such asa two-, three- or four-speed motor, and it may have a constant or variable torque orhorsepower. According to an embodiment of the invention the motor is arranged to atleast temporarily provide a higher torque, such as two or three times the normal operatingtorque, on demand. For example, a concrete finishing trowel can start to get stuck in anewly-laid concrete surface if left standing thereon. By temporarily increasing the torqueof the at least one battery-powered electric motor (for a few seconds for example) whenan operator wants to move the concrete finishing trowel, the machine can be moved outof the wet newly-laid concrete. lt is not as simple to increase the torque of a diesel- orpetrol-driven motor since this may result in the undesired overheating of transmission components, such as belts and/or centrifugal clutches.
PGl9644SEOO & PGl9644USOO According to an embodiment of the invention at least one battery-powered electric motorof the at least one battery-powered electric motor is arranged to drive the at least onerotor assembly via a planetary gear mechanism whereby power losses (as compared to belt drive systems or worm gear mechanisms) may be avoided.
According to another embodiment of the invention at least one battery-powered electricmotor of the at least one battery-powered electric motor is arranged vertically above atleast one rotor shaft of at least one rotor assembly of said at least one rotor assembly,where the concrete finishing trowel is standing on a flat horizontal surface. At least part ofa planetary gear mechanism may also be arranged vertically above at least one rotor shaft of at least one rotor assembly of said at least one rotor assembly.
According to another embodiment of the invention at least one battery-powered electricmotor of the at least one battery~powered electric motor is powered by at least one batteryhaving a total voltage of up to 5OV, such as at least one lithium ion battery or any other re- chargeable battery.
According to an embodiment of the invention at least one rotor assembly of the at leastone rotor assembly is individually maneuverable, i.e. the at least one rotor assembly may be individually driven and/or tilted and/or displaced with respect to the riding trowel.
According to another embodiment of the invention at ieast a surface of at least one of theat least one rotor blade is provided with a material having a lower coefficient of frictionthan steel on newly-laid concrete. At least a surface of a rotor blade may be provided withplastic or the entire rotor blade may comprise a composite material in order to reduce thefriction between the rotor blade and the newly-laid concrete as compared to conventionalsteel rotor blades on newly-laid concrete. Such a reduction in the friction between rotorblades and newly-laid concrete will reduce energy consumption during the operation ofthe concrete finishing trowel, which consequently results in lower running costs and anextension of the time for which a battery of the concrete finishing trowel can be used before it has to be re-charged.
According to a further embodiment of the invention at least one rotor assembly of the atleast one rotor assembly and at leas one battery-povvered electric motor of the at least one battery-powered motor is provided as a tiltable and/or displaceable unit, i.e. a rotor PGl9644SEOO & PGl9644USO0 assembly and a battery-powered electric motor together may be titled or displacedupwards, downwards or sideways with respect to the riding trowel during the steeringand/or operation of the riding trowel. The tilting of such a tiltable/displaceable unit cancause forces imposed on the underlying surface by the rotating rotor blades to propel theconcrete finishing trowel. The need for a flexible shaft between the rotor and motor or aflexible U-joint is overcome, which in turn improves the power transfer since a rigid shaft,i.e. a substantially non-elastic shaft that is not intended to bend during the steering oroperation of the concrete finishing trowel, can be used. Other components of a concretefinishing trowel, such as at least part of a planetary gear mechanism, may also be included in such a tiltable and/or displaceable unit.
According to another embodiment of the invention the concrete finishing trowel is a ridingtrowel and comprises an Operators seat and a plurality of battery-powered electricmotors, preferably an even number of battery-powered electric motors whereby theplurality of battery~powered electric motors is symmetrically distributed around theoperator's seat. For example, half of an even number of battery-powered electric motors may be placed on each side of the Operators seat.
According to a further embodiment of the invention the battery-powered electric motor ispowered by a plurality of batteries that is arranged to provide at least 110 ampere-hours of electric charge for at least two hours.
According to an embodiment of the invention at least one rotor assembly of the at leastone rotor assembly is/are arranged to be displaceable, for example in a direction alongthe rotor shaft. This may be advantageous if the concrete finishing trowel is being used ona sloping surface, such as a bridge, a drainage system, a flight of steps or a gallery, sinceit at least one rotor assembly can be displaced to make the concrete finishing trowel morestable. When a concrete finishing trowel having a diesel- or petrol-driven engine is usedon a sloping surface, the tilting of the fuel tank and/or oil tanks may cause the engine to shut off. This problem is avoided when using an electric engine.
The present invention also concerns the use of a concrete finishing trowel according to any of the embodiments of the invention in an indoor or enclosed environment. lO PG19644SEOO & PGl9644USO0 BRIEF DESCRIPTION OF THE DRAWINGS The present invention will hereinafter be further explained by means of non-limiting examples with reference to the appended figures where; Figure 1 shows a riding trowel according to an embodiment ofthe invention, Figure 2 is a schematic view of a battery-driven electric motor arranged above arotor shaft of a rotor assembly of a riding trowel according to anembodiment of the present invention, Figure 3 schematically shows the top of a riding trowel according to an embodimentof the present invention. lt should be noted that the drawings have not been drawn to scale and that the dimensions of certain features have been exaggerated for the sake of clarity.
DETAILED DESCRIPTION OF EMBODlMENTS Figure 1 shows a riding trowel 10 suitable for use in an indoor or enclosed environment.The illustrated riding trowel 10 comprises two rotor assemblies 20 mounted on anunderside thereof and each comprising a rotor shaft extending downwards from the deckof the riding trowel with a plurality of rotor blades 14 mounted thereon and extendingradially outwards from the rotor shaft 18. Each rotor assembly 12 is driven by a separatebattery-powered electric motor in the illustrated embodiment. The diameter of the rotorblades 14 may for example be 95, 120 or 150 cm or any other diameter that is suitable fora particular application. The riding trowel 10 comprises an Operators seat 16 in which anoperator sits to steer and operate the riding trowel 10. Such a riding trowel 10 requires nofuel tank, no electric cable for connection to an external power source, and no worm gears.
Figure 2 shows a rotor shaft 18 of a rotor assembly 12. A battery-powered multi-speedelectric motor 20 of variable torque, such as a 5.5 kW or 3 kW electric motor, is arrangedvertically above the vertical rotor shaft 18 whereby the output shaft of the battery-powered electric motor 20 may be arranged to drive the input shaft of a pianetary gear rnectwanisrrt lO PGl9644SEOO & PGl9644USOO 22, at least part of which is also located between the motor 20 and the rotor shaft 18. The planetary gear mechanism may have a gear ratio of 20:1.
According to an embodiment of the invention the battery-powered electric motor 20, therotor shaft 18 and any rotor blades 14 mounted thereon may be provided as a tiltableand/or displaceable unit to aid steering operations. Tilting such a unit from side to side orforwards and backwards may be used to steer the riding trowel 10 in the forward/reverse and the left/right directions respectively.
Figure 3 schematically shows the top of a riding trowel 10 according to an embodiment ofthe present invention in which two individually maneuverable and/or tiltable and/ordisplaceable battery-powered electric motors 20 are arranged symmetrically, one on eachside of the riding trowel Operators seat 16. At least of the rotor assemblies 12 driven byeach of the battery-powered electric motors 20 may be arranged to be displaceable, axially in a direction along its rotor shaft 18 for example.
The battery-powered electric motors 20 are powered by a plurality of batteries 24, such aslithium ion batteries or any other re-chargeable batteries, having a total voltage of up to 50V, such as a four 12 V batteries connected in parallel. The batteries 24 or battery packmay be arranged just under and/or behind the operator's seat 16 for example. Thebatteries may be arranged to provide at least 110 ampere-hours of electric charge for at least two hours.
The present invention also concerns the use of a concrete finishing trowel according to any of the embodiments of the invention in an indoor or enclosed environment.
Further modifications of the invention within the scope of the claims would be apparent to a skilled person.
Claims (12)
1. Concrete finishing trowel (10) comprising at least one rotor assembly (12)comprising a rotor shaft (18) with at least one rotor blade (14) for finishing newly-laidconcrete, whereby said at least one rotor assembly (12) is driven by at least one motor(20), characterized in that said at least one motor (20) is a battery-powered electric motor (20).
2. Concrete finishing trowel (10) according to claim 1, characterized in that at leastone battery-powered electric motor (20) of said at least one battery-powered electricmotor (20) is arranged to drive said at least one rotor assembly (12) via a planetary gear (22) mechanism.
3. Concrete finishing trowel (10) according to claim 1 or 2, characterized in that atleast one battery-powered electric motor (20) of said at least one battery-powered electricmotor (20) is arranged vertically above at least one rotor shaft (18) of at least one rotor assembly (12) of said at least one rotor assembly (12).
4. Concrete finishing trowel (10) according to any of the preceding claims,characterized in that at least one battery-powered electric motor (20) of said at least onebattery-powered electric motor (20) is powered by at least one battery having a total voltage of up to 50V.
5. Concrete finishing trowel (10) according to any of the preceding claims,characterized in that at least one battery-powered electric motor (20) has a variable torque.
6. Concrete finishing trowel (10) according to any of the preceding claims,characterized in that at least one rotor assembly (12) of said at least one rotor assembly (12) is individually maneuverable.
7. Concrete finishing trowel (10) according to any of the preceding claims,characterized in that at least a surface of at least one of said at least one rotor blade(14) is provided with a material having a lower coefficlent of friction than steel on newly- laid concrete. PG l9644SEOO & PG19644USOO
8. Concrete finishing trowel (10) according to any of the preceding claims,characterized in that at least one rotor assembly (12) of the at least one rotor assembly(12) and at least one battery-powered electric motor (20) of said at least one battery-powered electric motor (20) is provided as a tiltable and/or displaceable unit with respect to the riding trowel (10).
9. Concrete finishing trowel (10) according to any of the preceding claims,characterized in that it comprises an Operators seat (16) and a plurality of battery-powered electric motors (20), whereby said plurality of battery-powered electric motors (20) is symmetrically distributed around the operator's seat (16).
10. characterized in that said battery-powered electric motor (20) is powered by a plurality of Concrete finishing trowel (10) according to any of the preceding claims, batteries (24) that is arranged to provide at least 110 ampere-hours of electric charge for at least two hours.
11. Concrete finishing trovvel (10) according to any of the preceding claims,characterized in that the at least one rotor assembly (12) of said at least one rotor assembly (12) is/are arranged to be displaceable.
12. an indoor or enclosed environment. Use of a ooncrete finishing trowel (10) according to any of the preceding claims, in
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE1150864A SE1150864A1 (en) | 2011-09-22 | 2011-09-22 | Betongsglättare |
| PCT/SE2012/051008 WO2013043117A1 (en) | 2011-09-22 | 2012-09-24 | Concrete finishing trowel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE1150864A SE1150864A1 (en) | 2011-09-22 | 2011-09-22 | Betongsglättare |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SE1150864A1 true SE1150864A1 (en) | 2013-03-23 |
Family
ID=47915654
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE1150864A SE1150864A1 (en) | 2011-09-22 | 2011-09-22 | Betongsglättare |
Country Status (2)
| Country | Link |
|---|---|
| SE (1) | SE1150864A1 (en) |
| WO (1) | WO2013043117A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112459497A (en) * | 2020-12-04 | 2021-03-09 | 安徽亚遥工程机械有限公司 | Troweling machine with lithium battery as power |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018067506A1 (en) | 2016-10-06 | 2018-04-12 | Black & Decker Inc. | Battery and motor system for replacing internal combustion engine |
| EP3844860A4 (en) | 2018-08-28 | 2022-08-03 | Milwaukee Electric Tool Corporation | Battery-powered stand-alone motor unit |
| WO2021092552A1 (en) | 2019-11-08 | 2021-05-14 | Milwaukee Electric Tool Corporation | Battery-powered stand-alone motor unit |
| WO2021092549A1 (en) | 2019-11-08 | 2021-05-14 | Milwaukee Electric Tool Corporation | Battery-powered stand-alone motor unit |
| CN219268665U (en) | 2019-12-23 | 2023-06-27 | 米沃奇电动工具公司 | Independent motor unit, motor unit assembly and power plant assembly for use with a power plant |
| CN111519501A (en) * | 2020-05-18 | 2020-08-11 | 刘同聚 | Dual-power seat type troweling machine |
| US11927022B2 (en) | 2021-02-24 | 2024-03-12 | Milwaukee Electric Tool Corporation | Concrete trowel |
| US12442202B2 (en) | 2021-02-24 | 2025-10-14 | Milwaukee Electric Tool Corporation | Concrete trowel |
| WO2022192499A1 (en) * | 2021-03-11 | 2022-09-15 | Milwaukee Electric Tool Corporation | Concrete trowel |
| US12435527B2 (en) * | 2022-02-07 | 2025-10-07 | S.K.E. Masonry | Battery powered hand-operated troweling machine |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5108220A (en) * | 1990-07-13 | 1992-04-28 | Allen Engineering Corporation | Light weight, fast steering riding trowel |
| US5372452A (en) * | 1993-02-24 | 1994-12-13 | Hodgson; James A. | Power trowels |
| US7121762B2 (en) * | 2001-10-09 | 2006-10-17 | Somero Enterprises, Inc. | Apparatus for screeding uncured concrete surfaces |
| US7232277B2 (en) * | 2002-08-02 | 2007-06-19 | Chris Corbitt | Remotely-controlled concrete tool assembly |
| US7399140B2 (en) * | 2006-07-27 | 2008-07-15 | Lauro Barcenas | Power trowel attachment for a drill |
-
2011
- 2011-09-22 SE SE1150864A patent/SE1150864A1/en not_active Application Discontinuation
-
2012
- 2012-09-24 WO PCT/SE2012/051008 patent/WO2013043117A1/en not_active Ceased
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112459497A (en) * | 2020-12-04 | 2021-03-09 | 安徽亚遥工程机械有限公司 | Troweling machine with lithium battery as power |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2013043117A1 (en) | 2013-03-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| NAV | Patent application has lapsed |