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EP3501766A1 - Scie murale dotée d'un dispositif de verrouillage - Google Patents

Scie murale dotée d'un dispositif de verrouillage Download PDF

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Publication number
EP3501766A1
EP3501766A1 EP17209957.4A EP17209957A EP3501766A1 EP 3501766 A1 EP3501766 A1 EP 3501766A1 EP 17209957 A EP17209957 A EP 17209957A EP 3501766 A1 EP3501766 A1 EP 3501766A1
Authority
EP
European Patent Office
Prior art keywords
saw
saw blade
drive spindle
rotation
flange
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP17209957.4A
Other languages
German (de)
English (en)
Inventor
Josef Schittl
Bruno Werder
Walter Nessler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hilti AG
Original Assignee
Hilti AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hilti AG filed Critical Hilti AG
Priority to EP17209957.4A priority Critical patent/EP3501766A1/fr
Priority to US16/954,958 priority patent/US11597117B2/en
Priority to PCT/EP2018/083004 priority patent/WO2019120925A1/fr
Priority to EP18807378.7A priority patent/EP3727770B1/fr
Publication of EP3501766A1 publication Critical patent/EP3501766A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B5/00—Sawing machines working with circular or cylindrical saw blades; Components or equipment therefor
    • B27B5/29—Details; Component parts; Accessories
    • B27B5/38—Devices for braking the circular saw blade or the saw spindle; Devices for damping vibrations of the circular saw blade, e.g. silencing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B5/00—Sawing machines working with circular or cylindrical saw blades; Components or equipment therefor
    • B27B5/29—Details; Component parts; Accessories
    • B27B5/30—Details; Component parts; Accessories for mounting or securing saw blades or saw spindles
    • B27B5/32—Devices for securing circular saw blades to the saw spindle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
    • B28D1/02—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing
    • B28D1/04—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing with circular or cylindrical saw-blades or saw-discs
    • B28D1/044—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing with circular or cylindrical saw-blades or saw-discs the saw blade being movable on slide ways
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
    • B28D1/02—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing
    • B28D1/04—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing with circular or cylindrical saw-blades or saw-discs
    • B28D1/045—Sawing grooves in walls; sawing stones from rocks; sawing machines movable on the stones to be cut

Definitions

  • the present invention relates to a wall saw with a locking device according to the preamble of claim 1.
  • machining usually begins with the smallest saw blade diameter and the saw blade must be changed between the part cuts.
  • EP 0 785 054 B1 discloses a device system with a wall saw and a guide rail.
  • the wall saw has a saw head and a motor feed unit.
  • the saw head includes a saw blade attached to a saw arm and driven by a drive motor about an axis of rotation.
  • the saw arm is designed to be pivotable and is stiffened by a pivoting motor about a pivot axis.
  • the motorized feed unit comprises a guide carriage and a feed motor, wherein the saw head is arranged on the guide carriage and moved by the feed motor along the guide rail.
  • the drive of the saw blade about the axis of rotation via the drive motor, a drive spindle and a transmission device which connects the drive spindle torque transmitting with the drive motor.
  • the saw blade is fastened to the drive spindle with the help of a saw blade flange.
  • the saw blade flange consists of two flange halves, with a first flange half connected to the drive spindle and a second flange half to the saw blade.
  • the first and second flange half are connected to each other via a screw connection.
  • On the circumference of the first flange half radially arranged locking screws are provided, which are screwed into corresponding radial bores with internal thread in the second flange half.
  • the disadvantage is that the Operator must remove the saw blade to loosen the screw connection between the flange halves.
  • the object of the present invention is to simplify the locking of the saw blade flange on the drive spindle for the operator in a wall saw. In addition, the change of a saw blade between sections of a separating cut for the operator to be facilitated.
  • the drive spindle is locked in the unlocked state of the saw blade flange in the direction of rotation of the saw blade and is rotatable about the axis of rotation in a counter-direction opposite to the direction of rotation.
  • the unlocked state of the saw blade flange of the saw blade flange is not rotatably connected to the drive spindle and is designed to be adjustable relative to the drive spindle.
  • the inventive design of the drive spindle has the advantage that an unintentional tarnishing of the saw blade in the unlocked state of the saw blade flange is prevented. Characterized in that the drive spindle is rotatable in the opposite direction to the direction of rotation opposite to the rotation axis, the operator can move the saw blade or the drive spindle in an angular position, which facilitates the change of the saw blade.
  • the wall saw preferably has a motor-driven feed unit with a guide carriage and a feed motor, wherein the saw head is arranged on the guide carriage and can be moved by the feed motor along a guide rail in a feed direction.
  • the inventive construction of the wall saw is advantageous in large and heavy tool devices that are not hand-guided, but have a motor feed unit, which move the tool along a guide rail.
  • the locking device preferably has a pull rod, which is guided in the interior of the drive spindle, and a first connection element and the saw blade flange, a second connection element, wherein the first and second connection element are non-positively and / or positively connectable.
  • the first and second connecting element in the locked state of the blade flange are non-positively and / or positively connected.
  • the wall saw has a safety device.
  • the safety device preferably has a lever, a pawl and an axle element which connects the lever and the pawl to one another.
  • the lever is adjustable in the locked state of the saw blade between a first and second end position, wherein the pawl blocks a torque transmission in the direction of rotation of the saw blade in the first end position of the lever and releases in the second end position of the lever.
  • the lever can only be adjusted by the operator from the first end position to the second end position if the tool holder for the tool is countersunk in the saw arm housing.
  • the pawl in the unlocked state of the saw blade flange blocks a rotation of the drive spindle in the direction of rotation of the saw blade and releases the rotation of the drive spindle in the opposite direction to the direction of rotation.
  • FIG. 1 shows a device system 10 with a tool device 11, which is designed as a wall saw, and a guide rail 12.
  • the wall saw 11 comprises a guide rail 12 slidably arranged on the processing and feed unit 13 and a remote control 14.
  • the processing and feed unit 13 includes a processing unit 15 and a motorized feed unit 16.
  • the processing unit 15 is formed as a saw head and includes a saw blade 17 which is fixed to a saw arm 18 and is driven by a drive motor about an axis of rotation 19 .
  • the saw blade 17 is surrounded by a blade guard 21 which is fixed by a blade guard holder 22 on the saw arm 18th
  • the saw arm 18 is formed pivotable about a pivot axis by a pivot motor.
  • the swivel angle of the saw arm 18 determines with a saw blade diameter of the saw blade 17 how deep the saw blade 17 dips into a workpiece to be machined.
  • the motor feed unit 16 comprises a guide carriage 23 and a feed motor.
  • the saw head 15 is mounted on the guide carriage 23 and slidably formed on the feed motor along the guide rail 12 in a feed direction 24 (double arrow).
  • FIGS. 2A B show the saw head 15 of the wall saw 11 with the pivotable saw arm 18 in detail, wherein the saw blade 17 and the blade guard 21 are disassembled. It shows FIG. 2A the saw head 15 in a saw arm facing front view and FIG. 2 B shows the saw head 15 in a saw arm facing away from the rear view.
  • the saw blade 17 is mounted by means of a saw blade flange 25 on the saw arm 18 and rotates in operation of the wall saw 12 in a rotational direction 26 about the rotation axis 19.
  • the saw arm 18 is pivotable about a pivot axis 28 by means of a pivot motor 27; Alternatively, the saw arm 18 may be formed adjustable by means of a linear drive or other drive means.
  • FIG. 3 shows the saw head 15 of the wall saw 11 without saw blade 17 and blade guard 21 in a side view.
  • the saw blade 17 is rotatably connected by means of the saw blade flange 25 with the saw arm 18.
  • the drive of the saw blade 17 about the rotation axis 19 via a drive motor 31, a transmission device 32 and a drive spindle 33.
  • the drive motor 31 is arranged in a motor housing 34 and the transmission device 32 which is formed in the embodiment as a planetary gear rotatably connected.
  • the planetary gear 32 is at least partially disposed in a saw arm housing 35 of the saw arm 18.
  • the last stage of the planetary gear 32 is connected torque transmitting in the embodiment with the drive spindle 33.
  • the saw head 15 is mounted on the guide carriage 23 and is moved by a feed motor 36 along the guide rail 12.
  • the feed motor 36, the pivot motor 27 and the drive motor 31 may be formed as separate motors or integrated into one or more motors.
  • all the motors 27, 31, 36 of the wall saw 11 are arranged in the motor housing 34.
  • the saw blade flange 25 in the embodiment of FIG. 3 multi-part design and comprises an inner flange 37, an outer flange 38 and a fixing screw 39.
  • the inner flange 37 is rotatably mounted on the drive spindle 33, then the saw blade 17 and the outer flange are sequentially pushed onto the drive spindle 33 38, and finally the outer flange 38 is on the Fixing screw 39 attached.
  • the fastening screw 39 is tightened so far that the saw blade 17 is rotationally fixed between the inner flange 37 and the outer flange 38 is clamped.
  • a one-piece saw blade flange for flush cuts which is also referred to as flush flange, are used.
  • FIGS. 4A B show the drive spindle 33 and the saw blade flange 25 arranged on the drive spindle 33 in an unlocked state ( FIG. 4A ) and a locked state ( FIG. 4B ).
  • the saw blade flange 25 consists of the inner flange 37 which is rotatably connected to the drive spindle 33, and from the outer flange 38 and the mounting screw 39.
  • the inner flange 37 against the Drive spindle 33 is adjustable and in the locked state, the inner flange 37 is rotatably connected to the drive spindle 33.
  • the locking of the inner flange 37 via a locking device 41 which is formed in several parts in the embodiment.
  • the locking device comprises a rod 42, which is designed as a pull rod and guided in the interior of the drive spindle 33, a tool holder 43 and a first connecting element 44.
  • the tool holder 43 is provided on an end facing away from the inner flange 37 of the tie rod 42 and in the exemplary embodiment as inner Torx recording trained.
  • the first connecting element 44 is provided on an inner flange 37 facing the end of the tie rod 42 and formed in the embodiment as an external thread.
  • the external thread 44 is formed complementary to a bore with internal thread 45, which is provided in the inner flange 37 and forms a second connecting element.
  • the drive spindle 33 is hollow and forms inside a guide for the pull rod 42.
  • the pull rod 42 is biased in the pulling direction by a spring 46 which is arranged in a surrounding the pull rod 42 cavity of the drive spindle 33. The movement of the drawbar 42 via a tool which is connected via the tool holder 43 with the tie rod 42 and which is formed in the embodiment as a Torx key.
  • the Torx key is inserted into the tool holder 43.
  • the pull rod 42 is first displaced by means of the Torx key in the axial direction along the axis of rotation 19 against the spring tension of the spring 46 until the external thread 44 of the pull rod 42 engages in the internal thread 45 of the inner flange 37.
  • the external thread 44 is screwed into the internal thread 46.
  • the external thread 44 of the tie rod 42 and the internal thread 45 of the inner flange 37 form a non-positive and positive connection between the inner flange 37 and the tie rod 42.
  • the threaded connection between the inner flange 37 and the tie rod 42 is fully formed when the tool holder 43 relative to the saw arm housing 35 is formed flush or against the shegearmgephase 35 is set back to the inner flange 37 back.
  • the wall saw 12 has a safety device 47 , which ensures that the outer and inner threads 44, 45 are positively connected via the minimum height.
  • a lever 48 is provided which is part of the safety device 47 and which is adjustable about an adjustment axis 49 between a first end position and a second end position. In the FIG. 4A illustrated position of the lever 48 is referred to as the first end position and the in FIG. 4B illustrated position of the lever 48 is referred to as a second end position.
  • FIGS. 5A , B show the safety device 47 in a first position corresponding to the first end position of the lever 48
  • FIGS. 6A B show the safety device 47 in a second position, which corresponds to the second end position of the lever 48.
  • the safety device 47 comprises, in addition to the lever 48, a pawl 51, an axle element 52 which rigidly interconnects the lever 48 and the pawl 51, and a push button 53.
  • FIG. 5A shows the lever 48 in the first end position, which corresponds to the in FIG. 4A illustrated unlocked state of the inner flange 37 corresponds
  • FIG. 6A shows the lever 48 in the second end position, which corresponds to the in FIG. 4B shown locked state of the inner flange 37 corresponds.
  • the lever 48 can only be adjusted by the operator from the first end position to the second end position when the tool holder 43 for the Torx key is sunk in the saw arm housing 35.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Sawing (AREA)
EP17209957.4A 2017-12-22 2017-12-22 Scie murale dotée d'un dispositif de verrouillage Withdrawn EP3501766A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP17209957.4A EP3501766A1 (fr) 2017-12-22 2017-12-22 Scie murale dotée d'un dispositif de verrouillage
US16/954,958 US11597117B2 (en) 2017-12-22 2018-11-29 Wall saw having a locking device
PCT/EP2018/083004 WO2019120925A1 (fr) 2017-12-22 2018-11-29 Scie murale dotée d'un dispositif de verrouillage
EP18807378.7A EP3727770B1 (fr) 2017-12-22 2018-11-29 Scie murale dotée d'un dispositif de verrouillage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP17209957.4A EP3501766A1 (fr) 2017-12-22 2017-12-22 Scie murale dotée d'un dispositif de verrouillage

Publications (1)

Publication Number Publication Date
EP3501766A1 true EP3501766A1 (fr) 2019-06-26

Family

ID=60811862

Family Applications (2)

Application Number Title Priority Date Filing Date
EP17209957.4A Withdrawn EP3501766A1 (fr) 2017-12-22 2017-12-22 Scie murale dotée d'un dispositif de verrouillage
EP18807378.7A Active EP3727770B1 (fr) 2017-12-22 2018-11-29 Scie murale dotée d'un dispositif de verrouillage

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP18807378.7A Active EP3727770B1 (fr) 2017-12-22 2018-11-29 Scie murale dotée d'un dispositif de verrouillage

Country Status (3)

Country Link
US (1) US11597117B2 (fr)
EP (2) EP3501766A1 (fr)
WO (1) WO2019120925A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3970932A1 (fr) * 2020-09-22 2022-03-23 Hilti Aktiengesellschaft Système, procédé et dispositif de bride permettant de fixer une lame de scie à une broche d'entraînement d'un dispositif de scie

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0785054B1 (fr) 1996-01-17 2002-10-30 HILTI Aktiengesellschaft Machine à scier des parois et lame de scie

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US51478A (en) * 1865-12-12 Improvement in centering circular saws
US114926A (en) * 1871-05-16 Improvement in methods of attaching saws to their arbors
US3623281A (en) * 1969-06-16 1971-11-30 Robert H Moffat Mounting fixture
CA2716871C (fr) * 2008-02-29 2018-02-20 Husqvarna Ab Communication de scie electrique
DE202011110131U1 (de) * 2011-06-06 2013-02-11 Robert Bosch Gmbh Handwerkzeugmaschinenspannvorrichtung
US9089989B2 (en) * 2012-12-31 2015-07-28 Robert Bosch Gmbh Geared bolt system for securing a circular saw blade
JP6287205B2 (ja) * 2013-12-27 2018-03-07 日立工機株式会社 動力作業機
JP6478409B2 (ja) * 2015-08-18 2019-03-06 株式会社マキタ 作業工具
US10906153B2 (en) * 2018-06-01 2021-02-02 Makita Corporation Work tool
US11052475B2 (en) * 2018-11-27 2021-07-06 Zhejiang Burley Tools Co., Ltd. Rapid replacing structure for multi-purpose saw
IT201800010747A1 (it) * 2018-11-30 2020-05-30 Gmm S P A Gruppo portautensile di una macchina per la lavorazione di materiali in blocco o in lastra, macchina includente tale gruppo e metodo per la lavorazione di materiali in blocco o in lastra

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0785054B1 (fr) 1996-01-17 2002-10-30 HILTI Aktiengesellschaft Machine à scier des parois et lame de scie

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3970932A1 (fr) * 2020-09-22 2022-03-23 Hilti Aktiengesellschaft Système, procédé et dispositif de bride permettant de fixer une lame de scie à une broche d'entraînement d'un dispositif de scie
WO2022063587A1 (fr) * 2020-09-22 2022-03-31 Hilti Aktiengesellschaft Système, procédé et dispositif à bride pour fixer une lame de scie à une broche d'entraînement d'un dispositif de scie

Also Published As

Publication number Publication date
WO2019120925A1 (fr) 2019-06-27
EP3727770B1 (fr) 2022-03-23
EP3727770A1 (fr) 2020-10-28
US11597117B2 (en) 2023-03-07
US20200376704A1 (en) 2020-12-03

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