US20220288740A1 - Semi-manual machine tool for treating flat and horizontal surfaces - Google Patents
Semi-manual machine tool for treating flat and horizontal surfaces Download PDFInfo
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- US20220288740A1 US20220288740A1 US17/632,616 US202017632616A US2022288740A1 US 20220288740 A1 US20220288740 A1 US 20220288740A1 US 202017632616 A US202017632616 A US 202017632616A US 2022288740 A1 US2022288740 A1 US 2022288740A1
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- Prior art keywords
- drive plate
- machine tool
- tool according
- linear guide
- base
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- 230000033001 locomotion Effects 0.000 claims abstract description 33
- 230000005540 biological transmission Effects 0.000 claims abstract description 14
- 230000007246 mechanism Effects 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 239000004744 fabric Substances 0.000 claims description 3
- 238000005498 polishing Methods 0.000 claims description 3
- 230000008901 benefit Effects 0.000 description 4
- 239000011440 grout Substances 0.000 description 4
- 238000005096 rolling process Methods 0.000 description 4
- 238000011282 treatment Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 210000003462 vein Anatomy 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 241000282887 Suidae Species 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000004579 marble Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
Images
Classifications
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L11/00—Machines for cleaning floors, carpets, furniture, walls, or wall coverings
- A47L11/02—Floor surfacing or polishing machines
- A47L11/04—Floor surfacing or polishing machines hand-driven
- A47L11/06—Floor surfacing or polishing machines hand-driven with reciprocating or oscillating tools
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L11/00—Machines for cleaning floors, carpets, furniture, walls, or wall coverings
- A47L11/40—Parts or details of machines not provided for in groups A47L11/02 - A47L11/38, or not restricted to one of these groups, e.g. handles, arrangements of switches, skirts, buffers, levers
- A47L11/4063—Driving means; Transmission means therefor
- A47L11/4069—Driving or transmission means for the cleaning tools
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
- B24B23/04—Portable grinding machines, e.g. hand-guided; Accessories therefor with oscillating grinding tools; Accessories therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B29/00—Machines or devices for polishing surfaces on work by means of tools made of soft or flexible material with or without the application of solid or liquid polishing agents
- B24B29/005—Machines or devices for polishing surfaces on work by means of tools made of soft or flexible material with or without the application of solid or liquid polishing agents using brushes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B47/00—Drives or gearings; Equipment therefor
- B24B47/02—Drives or gearings; Equipment therefor for performing a reciprocating movement of carriages or work- tables
- B24B47/04—Drives or gearings; Equipment therefor for performing a reciprocating movement of carriages or work- tables by mechanical gearing only
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B47/00—Drives or gearings; Equipment therefor
- B24B47/10—Drives or gearings; Equipment therefor for rotating or reciprocating working-spindles carrying grinding wheels or workpieces
- B24B47/16—Drives or gearings; Equipment therefor for rotating or reciprocating working-spindles carrying grinding wheels or workpieces performing a reciprocating movement, e.g. during which the sense of rotation of the working-spindle is reversed
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B7/00—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor
- B24B7/10—Single-purpose machines or devices
- B24B7/18—Single-purpose machines or devices for grinding floorings, walls, ceilings or the like
Definitions
- the present invention concerns a motorized semi-manual machine tool for treating flat horizontal surfaces.
- the invention relates to a machine tool that moves according to a frontal linear motion.
- the field of application of this machine tool is that, if equipped with specific tools, of carrying out a treatment or process such as grinding, polishing, brushing or antiquing of said surfaces.
- the machine to which the present invention refers concerns the treatment of flat horizontal surfaces typically floors, or pedestrian or walkable surfaces, for example of homes, boars, jetties and walkways, etc.
- said machine tool is particularly suitable if said surfaces have grout lines or veins, such as those found on certain wooden, stone, ceramic or similar floors, more specifically, for example, parquet, marble or covered with square tiles made of various materials, such as ceramic or the like.
- the machine tool according to the present invention solves the aforesaid problems as, due to the linear movement imparted to the working tool by the machine, said grooves and said surfaces can be treated along a direction substantially aligned with said grooves or veins.
- a first advantage is that of obtaining an improved treatment, while a second advantage is that of reducing the times required to process a given surface.
- this machine tool does not leave circular marks on the surface being processed, representing a further advantage, as these signs are not aesthetically pleasing.
- a motorized semi-manual machine tool comprising at least:
- the drive plate is connected to the base in a manner sliding along a direction parallel to the direction of translation of the machine tool, i.e., parallel to the longitudinal axis of the machine.
- Said transmission system is configured to impart to said drive plate, and hence to the tool, a reciprocating rectilinear movement along said longitudinal direction.
- the two elements, base and drive plate are typically mutually superimposed, with the drive plate that, in a position of use of the machine, has the lower face facing the surface to be treated. Said lower face is typically substantially flat.
- the contact area between the tool and the surface to be treated extends transversely, i.e. extends to a greater degree along a direction parallel to the transverse axis of the machine.
- said contact area has an extension in width (L) greater than its longitudinal extension (P), i.e. depth.
- said contact area has a ratio (L)/(P) ranging from 1 to 6, preferably from 3.5 to 4.5.
- the contact area has a substantially rectangular planform.
- the contact area can coincide with the area of the lower face of the drive plate.
- the one or more tools that can be connected to the drive plate have a working area extending to a greater degree in transverse direction.
- the lower face of the drive plate thus offers a support surface for the connection of a tool or of several tools together having substantially the same dimensions and proportions.
- the base can have various forms as a function of the position of the motor or of aesthetic choices, for example substantially parallelepiped or cylindrical.
- the base also has a substantially rectangular planform extending to a greater degree along a transverse direction.
- the base has a lower (or inner) side on which the drive plate is mounted, which, during operation of the machine tool, is movable longitudinally, i.e., as indicated previously, according to a reciprocating rectilinear movement along a direction parallel to the direction of translation of the machine tool.
- the drive plate has a movement preferably ranging from 5 to 30 mm.
- the machine comprises linear guide means to guide the reciprocating rectilinear movement of the drive plate.
- said linear guide means comprise at least one linear guide whose track is preferably fixed to the base while the slide is integral with the drive plate.
- the motor is mounted on a mount, connected to the base, which extends toward the rear part of the machine.
- the motor is mounted in a position farther back with respect to the base.
- the motor is positioned so that its rotation axis is substantially vertical and the motor shaft is facing downward.
- the transmission comprises a belt that transmits the rotary motion from a first pulley, mounted on the motor shaft, to a second pulley mounted on a second shaft pivoted in the base or in the motor mount.
- the rotary motion of the second pulley is converted into reciprocating rectilinear motion preferably by means of a connecting rod-crank mechanism.
- a Scotch yoke mechanism or other equivalent systems can be used.
- the frequency of the reciprocating motion of the drive plate depends on the geometrical features of the transmission, i.e., of the belt transmission and of the motion conversion mechanism. From tests conducted by the applicant, an optimal range is from 400 cycles/min to 1500 cycles/min, more preferably from 500 cycles/min to 1000 cycles/min.
- this machine is equipped with rolling means configured to move said machine tool along a rectilinear direction.
- the rolling means are preferably wheels, typically two in number, or ball wheels.
- said rolling means can perform various functions.
- these means can act purely as an aid for moving the machine tool in an idle condition, for example to transport it to the place of use.
- the weight of the machine is discharged completely to the drive plate, or to the tool connected thereto.
- these means can also help to move the machine during use, preferably along the aforesaid rectilinear direction.
- the rolling means are in contact with the surface to be treated during operation of the machine; therefore, at least a portion of the weight of the machine is discharged to them.
- the wheels are positioned behind the motor mount where they do not obstruct operation of the tool and allow the machine to operate close to, or flush with, vertical edges or walls.
- the motor is positioned with its rotation axis at a distance (dr) from the axis of the wheels equal or similar to the distance (dp) between said wheels and the centreline of the drive plate taken in longitudinal direction.
- the ratio (dr)/(dp) between these distances ranges from 0.5 to 2, more preferably from 0.65 to 1.5, even more preferably from 0.8 to 1.2.
- the handle for controlling the machine comprises a steering rod that is connected to the motor mount preferably at the axis of said motor. This steering rod is then fixed at or close to the centre of mass of the machine tool.
- the connection point is located at a distance from the axis of the motor, taken along the horizontal direction, of no more than 150 mm, preferably no more than 100 mm, toward the front or rear part of the machine.
- This positioning ensures excellent maneuverability of the machine; in particular, acting with a minimum variation of the vertical pressure on the handle, it is possible to charge or discharge the drive plate and hence adjust the pressure that the tool exerts on the surface to be treated.
- the steering rod is rotatably connected to the motor mount, so as to be able to adjust the angle with respect to the machine with the ground, and is provided with a blocking device to block said rod in a given position during operation.
- FIG. 1 is an axonometric view of the machine tool according to an embodiment of the present invention
- FIG. 2 is a side view of the machine tool of FIG. 1 ;
- FIG. 3 is a view of the machine of FIG. 1 , sectioned along a vertical and longitudinal plane;
- FIG. 4 is a bottom plan view of the machine tool of FIG. 1 , without the drive plate.
- the reference number 1 indicates as a whole a machine tool having a base 2 , a motor mount 3 , a handle 4 , a drive plate 5 and a motor 6 .
- the base 2 comprises a substantially parallelepiped shaped box element open at the bottom to accommodate the drive plate 5 .
- the drive plate 5 is mounted movably on the lower or inner side of the base 2 .
- the drive plate 5 is guided by a pair of linear guides 7 , each comprising a track 7 a , fixed to the base 2 , and a slide 7 b integral with a cross bar 8 to which the drive plate 5 is connected.
- Said tracks 7 a are oriented along the longitudinal direction of the machine.
- said cross bar 8 is provided with removable connection means, for example snap fastening means or the like, to allow a rapid attachment and removal of the drive plate 5 .
- the motor mount 3 extends at the back from the base 2 and, in the variant illustrated, also comprises a box element 3 a , with two vertical wings 3 b arranged at the respective sides of the box element 3 a.
- the motor 6 is mounted on the motor mount 3 in vertical position with its shaft 6 a facing downward.
- the motor 6 is resting against the upper side of the box element 3 a which has a seat, not indicated in the figure, to allow the passage of said motor shaft 6 a.
- FIG. 3 illustrates the transmission system, indicated as a whole with 10 , which transmits the motion from the motor 6 to the drive plate 5 .
- Said transmission system comprises a first pulley 11 fitted onto the motor shaft 6 a , a second pulley 12 , mounted on a shaft 13 pivoted on the motor mount, and a belt 14 wrapped around said first and second pulleys.
- the transmission system further comprises a mechanism for converting the rotary motion of the second pulley 12 into the reciprocating rectilinear motion of the drive plate 5 .
- Said mechanism comprises a crank journal 15 fixed on the second pulley 12 , a connecting rod journal 16 fixed on the cross bar 8 , and a connecting rod 17 engaged with said crank and connecting rod journals, respectively with its head and foot.
- the machine is equipped with two wheels 20 configured to move said machine tool 1 along a rectilinear longitudinal direction.
- the two wheels 20 are connected in the rear part of the motor mount 3 , i.e. on the opposite side with respect to the front side of the base 2 .
- said wheels 20 are mounted sliding vertically with respect to the motor mount 3 so as to be able to adjust their position in height.
- the wheels 20 are mounted on a same support 21 provided with two guide elements 21 a , sliding in seats obtained in the box element 3 a of the motor mount 3 and provided with blocking means to block their position with respect to said box element.
- Adjustment of the wheels 20 makes it possible to use tools with different heights (or thicknesses) to be attached to the drive plate 5 , while at the same time allowing said tools always to operate in a condition substantially parallel to the surface to be treated.
- the handle 4 is connected to the motor mount 3 by means of a steering rod 10 .
- this rod 18 can be tilted as required, and its position can vary more or less from vertical to horizontal with respect to the surface to be treated. Usually, this position is vertical when the machine tool is idle.
- said steering rod 18 is hinged to the motor mount 3 so that the rotation axis Xa of the rod 18 is substantially aligned, according to a longitudinal direction, with the rotation axis Zm of the motor 6 .
- the steering rod 18 has the lower end, i.e., facing the machine, that separates into two diverging branches 18 a respectively hinged to one wing 3 a of the motor mount 3 .
- a water dispenser 9 is arranged close to the front side of the base 2 .
- the dispenser 9 is in the form of an elongated tube provided with orifices or nozzles for spraying water or another suitable liquid. During processing, it is this dispenser 9 can be activated so that it sprays water onto the floor surface in front of the drive plate 5 .
- Said dispenser can be connected to an external water source, or the machine can be equipped with a tank for said water or other liquid and with pumping means.
- the drive plate 5 has a width ranging from 350 to 550 mm and depth ranging from 90 to 300 mm, although other dimensions are naturally possible.
- the drive plate 5 has dimensions of 450 mm in width and 115 mm in depth.
- the working tool 5 has more or less the same dimensions as the drive plate 5 .
- the total range of travel C of the drive plate 5 is around 20 mm, i.e., around 17% of its depth.
- the drive plate 5 has a lower face adapted to receive and house a working tool 30 , interchangeable as a function of the processing operation to be carried out and of the type of surface to be treated.
- This working tool 30 can, for example, be a felt polishing disc, a brush disc, an abrasive cloth disc, an abrasive mesh disc, a nonwoven disc or the like.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
- Compositions Of Oxide Ceramics (AREA)
- Wire Processing (AREA)
Abstract
Disclosed is a semi-manual machine tool for treating flat horizontal surfaces, this machine including: a base; a drive plate connected to the base having a lower face adapted to be connected to a working tool; a motor; a transmission system between the motor and the drive plate; a handle for controlling the machine; and a working tool connected to the lower face of the drive plate. The drive plate is connected to the base in a manner sliding along a direction parallel to the direction of translation of the machine tool, i.e., parallel to the longitudinal axis of the machine tool, the transmission system being configured to impart to the drive plate a reciprocating rectilinear movement along the longitudinal direction.
Description
- This application is the U.S. national phase of International Application No. PCT/IB2020/057348 filed Aug. 4, 2020 which designated the U.S. and claims priority to IT Patent Application No. 102019000014037 filed Aug. 5, 2019, the entire contents of each of which are hereby incorporated by reference.
- The present invention concerns a motorized semi-manual machine tool for treating flat horizontal surfaces. In particular, the invention relates to a machine tool that moves according to a frontal linear motion.
- The field of application of this machine tool is that, if equipped with specific tools, of carrying out a treatment or process such as grinding, polishing, brushing or antiquing of said surfaces.
- The machine to which the present invention refers concerns the treatment of flat horizontal surfaces typically floors, or pedestrian or walkable surfaces, for example of homes, boars, jetties and walkways, etc.
- More in particular, said machine tool is particularly suitable if said surfaces have grout lines or veins, such as those found on certain wooden, stone, ceramic or similar floors, more specifically, for example, parquet, marble or covered with square tiles made of various materials, such as ceramic or the like.
- Generally, in prior art semi-manual motorized machine tools used for these types of treatments and processes, for example grinding machines for floors or other flat horizontal surfaces, the tools move according to a rotary, orbital or planetary rotary motion. Therefore, these machines perform a processing action of circular type, or with a circular component, on the surface being treated.
- On surfaces with grooves, such as the grout lines present between tiles or between adjacent wooden boards, this type of circular/orbital movement mainly concerns the raised parts of these surfaces.
- In profiles that are not perfectly flat and continuous, it is therefore difficult to reach said grooves with the tool, whether this is a brush, a paper, cloth or mesh abrasive disc, or a nonwoven pad.
- Consequently, this means that with these prior art machines a great deal of time is required to treat the grout lines requires, as numerous steps are necessary in order to treat the whole of the surface involved.
- However, in this way there is the risk of removing too much material on said raised parts, changing their appearance, or in some cases, damaging them.
- Moreover, treating said grooves with these machines does not provide satisfactory results, as it is not easy to pass over all the small portions that were left untreated in the previous passes.
- Another limit of prior art machines is that the circular movement, or with a circular component, of the tools leaves circular or curved processing marks on the surface. In the case of surfaces that have grout lines or veins of the material aligned along a main direction, these circular processing marks have a rather unattractive appearance.
- The machine tool according to the present invention solves the aforesaid problems as, due to the linear movement imparted to the working tool by the machine, said grooves and said surfaces can be treated along a direction substantially aligned with said grooves or veins. A first advantage is that of obtaining an improved treatment, while a second advantage is that of reducing the times required to process a given surface.
- Moreover, this machine tool does not leave circular marks on the surface being processed, representing a further advantage, as these signs are not aesthetically pleasing.
- These and other objects are achieved by a motorized semi-manual machine tool, comprising at least:
-
- a base;
- a drive plate having a lower face to which a working tool can be attached;
- a motor;
- a transmission system between said drive plate and said motor; and
- a handle for controlling the machine.
- The drive plate is connected to the base in a manner sliding along a direction parallel to the direction of translation of the machine tool, i.e., parallel to the longitudinal axis of the machine.
- Said transmission system is configured to impart to said drive plate, and hence to the tool, a reciprocating rectilinear movement along said longitudinal direction.
- In detail, the two elements, base and drive plate, are typically mutually superimposed, with the drive plate that, in a position of use of the machine, has the lower face facing the surface to be treated. Said lower face is typically substantially flat.
- Hereinafter, the terms “front”, “rear” “below”, “above”, “upper”, “lower” and “side” are defined for a machine tool in a normal position of use.
- According to an advantageous aspect of the present invention, the contact area between the tool and the surface to be treated extends transversely, i.e. extends to a greater degree along a direction parallel to the transverse axis of the machine.
- In practice, said contact area has an extension in width (L) greater than its longitudinal extension (P), i.e. depth.
- According to a preferred variant, said contact area has a ratio (L)/(P) ranging from 1 to 6, preferably from 3.5 to 4.5. Typically, the contact area has a substantially rectangular planform.
- According to a preferred variant, the contact area can coincide with the area of the lower face of the drive plate. In practice, according to this variant the one or more tools that can be connected to the drive plate have a working area extending to a greater degree in transverse direction. The lower face of the drive plate thus offers a support surface for the connection of a tool or of several tools together having substantially the same dimensions and proportions.
- The base can have various forms as a function of the position of the motor or of aesthetic choices, for example substantially parallelepiped or cylindrical. Typically, the base also has a substantially rectangular planform extending to a greater degree along a transverse direction.
- The base has a lower (or inner) side on which the drive plate is mounted, which, during operation of the machine tool, is movable longitudinally, i.e., as indicated previously, according to a reciprocating rectilinear movement along a direction parallel to the direction of translation of the machine tool.
- In particular, the drive plate has a movement preferably ranging from 5 to 30 mm.
- According to an aspect of the invention, the machine comprises linear guide means to guide the reciprocating rectilinear movement of the drive plate.
- According to a preferred variant, said linear guide means comprise at least one linear guide whose track is preferably fixed to the base while the slide is integral with the drive plate. Preferably at least two linear guides are provided, arranged symmetrically with respect to the centreline of the drive plate.
- According to an aspect of the invention, the motor is mounted on a mount, connected to the base, which extends toward the rear part of the machine. In practice, the motor is mounted in a position farther back with respect to the base.
- The motor is positioned so that its rotation axis is substantially vertical and the motor shaft is facing downward.
- According to this configuration, the transmission comprises a belt that transmits the rotary motion from a first pulley, mounted on the motor shaft, to a second pulley mounted on a second shaft pivoted in the base or in the motor mount. The rotary motion of the second pulley is converted into reciprocating rectilinear motion preferably by means of a connecting rod-crank mechanism. Alternatively, a Scotch yoke mechanism or other equivalent systems can be used.
- The frequency of the reciprocating motion of the drive plate depends on the geometrical features of the transmission, i.e., of the belt transmission and of the motion conversion mechanism. From tests conducted by the applicant, an optimal range is from 400 cycles/min to 1500 cycles/min, more preferably from 500 cycles/min to 1000 cycles/min.
- According to a particular embodiment, this machine is equipped with rolling means configured to move said machine tool along a rectilinear direction. The rolling means are preferably wheels, typically two in number, or ball wheels.
- As a function of their positioning, said rolling means can perform various functions. For example, these means can act purely as an aid for moving the machine tool in an idle condition, for example to transport it to the place of use. According to this variant, in the condition of use, the weight of the machine is discharged completely to the drive plate, or to the tool connected thereto.
- According to a preferred variant, these means can also help to move the machine during use, preferably along the aforesaid rectilinear direction. In this second variant the rolling means are in contact with the surface to be treated during operation of the machine; therefore, at least a portion of the weight of the machine is discharged to them.
- Typically, the wheels are positioned behind the motor mount where they do not obstruct operation of the tool and allow the machine to operate close to, or flush with, vertical edges or walls.
- According to a preferred variant, the motor is positioned with its rotation axis at a distance (dr) from the axis of the wheels equal or similar to the distance (dp) between said wheels and the centreline of the drive plate taken in longitudinal direction.
- Typically, the ratio (dr)/(dp) between these distances ranges from 0.5 to 2, more preferably from 0.65 to 1.5, even more preferably from 0.8 to 1.2.
- According to an aspect of the invention, the handle for controlling the machine comprises a steering rod that is connected to the motor mount preferably at the axis of said motor. This steering rod is then fixed at or close to the centre of mass of the machine tool. In general, the connection point is located at a distance from the axis of the motor, taken along the horizontal direction, of no more than 150 mm, preferably no more than 100 mm, toward the front or rear part of the machine.
- This positioning ensures excellent maneuverability of the machine; in particular, acting with a minimum variation of the vertical pressure on the handle, it is possible to charge or discharge the drive plate and hence adjust the pressure that the tool exerts on the surface to be treated.
- Preferably, the steering rod is rotatably connected to the motor mount, so as to be able to adjust the angle with respect to the machine with the ground, and is provided with a blocking device to block said rod in a given position during operation.
- Further features and advantages of the present invention will be more apparent from the description of a preferred but not exclusive example of embodiment of a machine tool as illustrated in the accompanying figures wherein:
-
FIG. 1 is an axonometric view of the machine tool according to an embodiment of the present invention; -
FIG. 2 is a side view of the machine tool ofFIG. 1 ; -
FIG. 3 is a view of the machine ofFIG. 1 , sectioned along a vertical and longitudinal plane; -
FIG. 4 is a bottom plan view of the machine tool ofFIG. 1 , without the drive plate. - With reference to the accompanying figures, the
reference number 1 indicates as a whole a machine tool having abase 2, amotor mount 3, ahandle 4, adrive plate 5 and amotor 6. - In the example illustrated, the
base 2 comprises a substantially parallelepiped shaped box element open at the bottom to accommodate thedrive plate 5. - More in detail, the
drive plate 5 is mounted movably on the lower or inner side of thebase 2. Thedrive plate 5 is guided by a pair oflinear guides 7, each comprising atrack 7 a, fixed to thebase 2, and aslide 7 b integral with across bar 8 to which thedrive plate 5 is connected.Said tracks 7 a are oriented along the longitudinal direction of the machine. - Preferably, said
cross bar 8 is provided with removable connection means, for example snap fastening means or the like, to allow a rapid attachment and removal of thedrive plate 5. Themotor mount 3 extends at the back from thebase 2 and, in the variant illustrated, also comprises abox element 3 a, with twovertical wings 3 b arranged at the respective sides of thebox element 3 a. - The
motor 6 is mounted on themotor mount 3 in vertical position with itsshaft 6 a facing downward. In detail, themotor 6 is resting against the upper side of thebox element 3 a which has a seat, not indicated in the figure, to allow the passage of saidmotor shaft 6 a. -
FIG. 3 illustrates the transmission system, indicated as a whole with 10, which transmits the motion from themotor 6 to thedrive plate 5. Said transmission system comprises afirst pulley 11 fitted onto themotor shaft 6 a, asecond pulley 12, mounted on ashaft 13 pivoted on the motor mount, and abelt 14 wrapped around said first and second pulleys. - The transmission system further comprises a mechanism for converting the rotary motion of the
second pulley 12 into the reciprocating rectilinear motion of thedrive plate 5. - Said mechanism comprises a
crank journal 15 fixed on thesecond pulley 12, a connectingrod journal 16 fixed on thecross bar 8, and a connectingrod 17 engaged with said crank and connecting rod journals, respectively with its head and foot. - The action of the connecting
rod 17 on thecross bar 8 thus causes a reciprocating to-and-from linear movement of thedrive plate 5 with respect to thebase 2. - The machine is equipped with two
wheels 20 configured to move saidmachine tool 1 along a rectilinear longitudinal direction. The twowheels 20 are connected in the rear part of themotor mount 3, i.e. on the opposite side with respect to the front side of thebase 2. - In a preferred variant, said
wheels 20 are mounted sliding vertically with respect to themotor mount 3 so as to be able to adjust their position in height. In the example illustrated, thewheels 20 are mounted on asame support 21 provided with twoguide elements 21 a, sliding in seats obtained in thebox element 3 a of themotor mount 3 and provided with blocking means to block their position with respect to said box element. - Adjustment of the
wheels 20 makes it possible to use tools with different heights (or thicknesses) to be attached to thedrive plate 5, while at the same time allowing said tools always to operate in a condition substantially parallel to the surface to be treated. - The
handle 4 is connected to themotor mount 3 by means of a steeringrod 10. As in prior art machine tools with rotary orbital movement, thisrod 18 can be tilted as required, and its position can vary more or less from vertical to horizontal with respect to the surface to be treated. Usually, this position is vertical when the machine tool is idle. - According to the invention, said steering
rod 18 is hinged to themotor mount 3 so that the rotation axis Xa of therod 18 is substantially aligned, according to a longitudinal direction, with the rotation axis Zm of themotor 6. In the variant illustrated, the steeringrod 18 has the lower end, i.e., facing the machine, that separates into two divergingbranches 18 a respectively hinged to onewing 3 a of themotor mount 3. - According to an embodiment, a
water dispenser 9 is arranged close to the front side of thebase 2. Typically, thedispenser 9 is in the form of an elongated tube provided with orifices or nozzles for spraying water or another suitable liquid. During processing, it is thisdispenser 9 can be activated so that it sprays water onto the floor surface in front of thedrive plate 5. Said dispenser can be connected to an external water source, or the machine can be equipped with a tank for said water or other liquid and with pumping means. - Preferably, the
drive plate 5 has a width ranging from 350 to 550 mm and depth ranging from 90 to 300 mm, although other dimensions are naturally possible. - According to the example of embodiment shown in the figures, the
drive plate 5 has dimensions of 450 mm in width and 115 mm in depth. The workingtool 5 has more or less the same dimensions as thedrive plate 5. The total range of travel C of thedrive plate 5 is around 20 mm, i.e., around 17% of its depth. - The
drive plate 5 has a lower face adapted to receive and house a workingtool 30, interchangeable as a function of the processing operation to be carried out and of the type of surface to be treated. This workingtool 30 can, for example, be a felt polishing disc, a brush disc, an abrasive cloth disc, an abrasive mesh disc, a nonwoven disc or the like. - The invention has been described purely for non-limiting illustrative purposes, according to some preferred embodiments. The person skilled in the art can find numerous other embodiments and variants, all falling within the scope of protection of the claims below.
Claims (20)
1. A semi-manual machine tool for treating flat horizontal surfaces, said machine comprising:
a base;
a drive plate connected to the base having a lower face adapted to be connected to a working tool;
a motor;
a transmission system between said motor and said drive plate;
a handle for controlling the machine; and
a working tool connected to the lower face of the drive plate;
wherein the drive plate is connected to the base in a manner sliding along a direction parallel to the direction of translation of the machine tool, i.e., parallel to the longitudinal axis of the machine tool, said transmission system being configured to impart to said drive plate a reciprocating rectilinear movement along said longitudinal direction.
2. The machine tool according to claim 1 , wherein the contact area between the working tool and the surface to be treated has an extension in width greater than the extension in depth of the surface to be treated.
3. The machine tool according to claim 2 , wherein a ratio of the extension in width to the extension in depth is in a range of 1 to 6.
4. The machine tool according to claim 2 , wherein the tool has the same form and dimension as the drive plate.
5. The machine tool according claim 1 , wherein the drive plate performs a movement with a range of travel from 5 to 30 mm.
6. The machine tool according to claim 1 , comprising at least one linear guide means for guiding the reciprocating rectilinear movement of the drive plate, said linear guide means comprising at least one linear guide with a track fixed to the lower side of the base and a slide, sliding on the track, integral with the drive plate.
7. The machine tool according to claim 1 , wherein the transmission system comprises a belt that transmits the rotary motion from a first pulley, mounted on the motor shaft, to a second pulley mounted on a second shaft pivoted in the base or in the motor mount, said transmission system further comprising a crank-connecting rod mechanism, connected to the drive plate, to convert the rotary motion of the second pulley into a reciprocating rectilinear motion of said drive plate.
8. The machine tool according to claim 1 , comprising wheels configured to move said machine tool along a rectilinear direction parallel to the longitudinal axis.
9. The machine tool according to claim 8 , comprising a motor mount, integral with the base, said motor being arranged on the motor mount so that the ratio dr/dp ranges from 0.5 to 2, where dr is the distance of the rotation axis of the motor from the axis of the wheels and dp is the distance from the centreline of the drive plate, taken in longitudinal direction, from the axis of said wheels.
10. The machine tool according to claim 1 , wherein the handle for controlling the machine comprises a steering rod which is connected to the motor mount so that the distance between the connection point of said rod and the axis of the motor, taken along the longitudinal direction, is no greater than 150 mm toward the front or rear part of the machine.
11. The machine tool according to claim 1 , comprising a water dispenser arranged close to the front side of the base.
12. The machine tool according to claim 1 , wherein said working tool is chosen from a felt polishing disc, a brush disc, an abrasive cloth disc, an abrasive mesh disc or a nonwoven disc.
13. The machine tool according to claim 3 , wherein the tool has the same form and dimension as the drive plate.
14. The machine tool according to claim 2 , wherein the drive plate performs a movement with a range of travel from 5 to 30 mm.
15. The machine tool according to claim 3 , wherein the drive plate performs a movement with a range of travel from 5 to 30 mm.
16. The machine tool according to claim 4 , wherein the drive plate performs a movement with a range of travel from 5 to 30 mm.
17. The machine tool according to claim 2 , comprising at least one linear guide means for guiding the reciprocating rectilinear movement of the drive plate, said linear guide means comprising at least one linear guide with a track fixed to the lower side of the base and a slide, sliding on the track, integral with the drive plate.
18. The machine tool according to claim 3 , comprising at least one linear guide means for guiding the reciprocating rectilinear movement of the drive plate, said linear guide means comprising at least one linear guide with a track fixed to the lower side of the base and a slide, sliding on the track, integral with the drive plate.
19. The machine tool according to claim 4 , comprising at least one linear guide means for guiding the reciprocating rectilinear movement of the drive plate, said linear guide means comprising at least one linear guide with a track fixed to the lower side of the base and a slide, sliding on the track, integral with the drive plate.
20. The machine tool according to claim 5 , comprising at least one linear guide means for guiding the reciprocating rectilinear movement of the drive plate, said linear guide means comprising at least one linear guide with a track fixed to the lower side of the base and a slide, sliding on the track, integral with the drive plate.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT102019000014037 | 2019-08-05 | ||
IT102019000014037A IT201900014037A1 (en) | 2019-08-05 | 2019-08-05 | FRONT STRAIGHT MOTION TOOL MACHINE |
PCT/IB2020/057348 WO2021024173A1 (en) | 2019-08-05 | 2020-08-04 | Semi-manual machine tool for treating flat and horiyontal surfaces |
Publications (1)
Publication Number | Publication Date |
---|---|
US20220288740A1 true US20220288740A1 (en) | 2022-09-15 |
Family
ID=68988182
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US17/632,616 Pending US20220288740A1 (en) | 2019-08-05 | 2020-08-04 | Semi-manual machine tool for treating flat and horizontal surfaces |
Country Status (5)
Country | Link |
---|---|
US (1) | US20220288740A1 (en) |
EP (1) | EP4010148A1 (en) |
CN (1) | CN114521119A (en) |
IT (1) | IT201900014037A1 (en) |
WO (1) | WO2021024173A1 (en) |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2102063A (en) * | 1935-11-25 | 1937-12-14 | Fred L Detwiler | Floor sander |
DE1101709B (en) * | 1955-04-21 | 1961-03-09 | Kurt Stoll K G | Stripping machine for parquet floors |
DE2322638A1 (en) * | 1972-06-08 | 1973-12-20 | Shapiro Leonrad U | SWINGING CRAFT TOOL |
US6866570B2 (en) * | 2003-05-09 | 2005-03-15 | John P. Hunter, Jr. | Variable speed reciprocating linear sliding dual floor sander |
CA2751193C (en) * | 2003-09-03 | 2014-04-15 | The Procter & Gamble Company | Multi-surfaces cleaning implement |
AU2012384600A1 (en) * | 2011-12-13 | 2014-07-24 | Anderson (Nz) Limited | Improved abrasive apparatus and components thereof |
DE202013006900U1 (en) * | 2013-08-01 | 2014-11-03 | C. & E. Fein Gmbh | machine tool |
US9833872B2 (en) * | 2014-12-30 | 2017-12-05 | Robert Bosch Tool Corporation | Adjustable contour sander attachment for a power tool |
-
2019
- 2019-08-05 IT IT102019000014037A patent/IT201900014037A1/en unknown
-
2020
- 2020-08-04 US US17/632,616 patent/US20220288740A1/en active Pending
- 2020-08-04 WO PCT/IB2020/057348 patent/WO2021024173A1/en unknown
- 2020-08-04 EP EP20764768.6A patent/EP4010148A1/en active Pending
- 2020-08-04 CN CN202080050376.7A patent/CN114521119A/en active Pending
Also Published As
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IT201900014037A1 (en) | 2021-02-05 |
EP4010148A1 (en) | 2022-06-15 |
CN114521119A (en) | 2022-05-20 |
WO2021024173A1 (en) | 2021-02-11 |
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