EP3727770B1 - 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
EP3727770B1
EP3727770B1 EP18807378.7A EP18807378A EP3727770B1 EP 3727770 B1 EP3727770 B1 EP 3727770B1 EP 18807378 A EP18807378 A EP 18807378A EP 3727770 B1 EP3727770 B1 EP 3727770B1
Authority
EP
European Patent Office
Prior art keywords
saw
saw blade
rotation
drive spindle
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.)
Active
Application number
EP18807378.7A
Other languages
German (de)
English (en)
Other versions
EP3727770A1 (fr
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
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Publication date
Application filed by Hilti AG filed Critical Hilti AG
Publication of EP3727770A1 publication Critical patent/EP3727770A1/fr
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Publication of EP3727770B1 publication Critical patent/EP3727770B1/fr
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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
    • B27G—ACCESSORY MACHINES OR APPARATUS FOR WORKING WOOD OR SIMILAR MATERIALS; TOOLS FOR WORKING WOOD OR SIMILAR MATERIALS; SAFETY DEVICES FOR WOOD WORKING MACHINES OR TOOLS
    • B27G19/00—Safety guards or devices specially adapted for wood saws; Auxiliary devices facilitating proper operation of wood saws
    • B27G19/02—Safety guards or devices specially adapted for wood saws; Auxiliary devices facilitating proper operation of wood saws for circular saws
    • 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.
  • the saw blade is attached to the drive spindle using a saw blade flange.
  • the saw blade flange consists of two flange halves, with a first flange half being connected to the drive spindle and a second flange half being connected to the saw blade.
  • the first and second flange halves are connected to one another 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 threads in the second flange half.
  • the disadvantage is that the operator has to remove the saw blade to loosen the bolted connection between the flange halves.
  • the locking device preferably has a pull rod, which is guided inside the drive spindle, and a first connecting element and the saw blade flange has a second connecting element, the first and second connecting elements being able to be connected in a non-positive and/or positive manner.
  • the first and second connecting elements are particularly preferably connected in a non-positive and/or positive manner in the locked state of the saw blade flange.
  • the lever can be adjusted between a first and second end position when the saw blade flange is in the locked state, with the pawl blocking torque transmission in the direction of rotation of the saw blade in the first end position of the lever and releasing it 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 when the tool holder for the tool is sunk into the saw arm housing.
  • the pawl In the unlocked state of the saw blade flange, the pawl particularly preferably blocks 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 processing and feed unit 13 arranged to be displaceable on the guide rail 12 and a remote control 14 .
  • the processing and feed unit 13 comprises a processing unit 15 and a motorized feed unit 16 .
  • the processing unit 15 is designed as a saw head and includes a saw blade 17 which is attached 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 saw blade guard 21 which is attached to the saw arm 18 by means of a blade guard holder 22 .
  • the saw arm 18 is designed to be 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 motorized feed unit 16 includes a guide carriage 23 and a feed motor.
  • the saw head 15 is mounted on the guide carriage 23 and is designed to be displaceable via the feed motor along the guide rail 12 in a feed direction 24 (double arrow).
  • FIGN. 2A , B show the saw head 15 of the wall saw 11 with the pivotable saw arm 18 in detail, with the saw blade 17 and the saw blade guard 21 being removed. while showing FIG. 2A the saw head 15 in a front view facing the saw arm and FIG. 2 B shows the saw head 15 in a rear view facing away from the saw arm.
  • FIG. 3 shows the saw head 15 of the wall saw 11 without the saw blade 17 and saw blade guard 21 in a side view.
  • the saw blade 17 can be connected to the saw arm 18 in a rotationally fixed manner by means of the saw blade flange 25 .
  • the saw blade 17 is driven about the axis of rotation 19 via a drive motor 31 , a transmission device and a drive spindle 33 .
  • the drive motor 31 is arranged in a motor housing 34 and non-rotatably connected to the transmission device, which is designed as a planetary gear in the exemplary embodiment.
  • the planetary gear is at least partially arranged in a saw arm housing 35 of the saw arm 18 .
  • the last stage of the planetary gear is connected to the drive spindle 33 in a torque-transmitting manner.
  • the saw head 15 is mounted on the guide carriage 23 and is moved along the guide rail 12 by a feed motor 36 .
  • the feed motor 36, the swivel motor 27 and the drive motor 31 can be designed as separate motors or can be integrated into one or more motors.
  • all of 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 designed in several parts and comprises an inner flange 37 , an outer flange 38 and a fastening screw 39 .
  • the inner flange 37 is mounted non-rotatably on the drive spindle 33, then the saw blade 17 and the outer flange 38 are successively pushed onto the drive spindle 33 and finally the outer flange 38 is fastened via the fastening screw 39.
  • the fastening screw 39 is tightened until the saw blade 17 is clamped between the inner flange 37 and the outer flange 38 in a torque-proof manner.
  • a one-part saw blade flange for flush cuts which is also referred to as a flush cut flange, can be used.
  • FIGN. 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 can be connected in a torque-proof manner to the drive spindle 33, and of the outer flange 38 and the fastening screw 39.
  • the inner flange 37 is opposite the Drive spindle 33 is designed to be adjustable and in the locked state the inner flange 37 is connected to the drive spindle 33 in a torque-proof manner.
  • the locking of the inner flange 37 takes place via a locking device 41 , which is designed in several parts in the exemplary embodiment.
  • the locking device includes a rod 42 which is designed as a pull rod and is guided inside the drive spindle 33 , a tool holder and a first connecting element 44 .
  • the tool holder is provided on an end of the pull rod 42 facing away from the inner flange 37 and is designed as an inner Torx holder in the exemplary embodiment.
  • the first connecting element 44 is provided on an end of the pull rod 42 facing the inner flange 37 and is designed as an external thread in the exemplary embodiment.
  • the external thread 44 is complementary to an internally threaded bore 45 which is provided in the inner flange 37 and forms a second connecting element.
  • the drive spindle 33 is hollow and forms a guide for the pull rod 42 on the inside.
  • the pull rod 42 is preloaded in the pulling direction by a spring 46 which is arranged in a hollow space in the drive spindle 33 surrounding the pull rod 42 .
  • the movement of the pull rod 42 takes place via a tool which can be connected to the pull rod 42 via the tool holder and which is designed as a Torx key in the exemplary embodiment.
  • the Torx key is inserted into the tool holder.
  • the pull rod 42 is initially displaced in the axial direction along the axis of rotation 19 against the spring tension of the spring 46 with the aid of the Torx key 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 by turning the Torx key around the axis of rotation 19 .
  • the external thread 44 of the pull 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 pull rod 42.
  • the threaded connection between the inner flange 37 and the pull rod 42 is fully formed when the tool holder is opposite the saw arm housing 35 is flush or is set back relative to the saw arm housing 35 towards the inner flange 37 .
  • the wall saw 11 has a safety device that ensures that the external and internal threads 44, 45 are positively connected over the minimum height.
  • a lever 48 is provided on the side of the saw arm housing 35 facing away from the flange, which is part of the safety device and which can be adjusted about an adjustment axis 49 between a first end position and a second end position. In the FIG. 4A The position of the lever 48 shown is referred to as the first end position and the FIG. 4B shown position of the lever 48 is referred to as the second end position.
  • FIGN. 5A , B show the safety device in a first position, which corresponds to the first end position of the lever 48
  • FIGN. 6A , B show the safety device in a second position, which corresponds to the second end position of the lever 48.
  • the safety device comprises a pawl 51 , an axle element which rigidly connects the lever 48 and the pawl 51 to one another, and a push button.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Mining & Mineral Resources (AREA)
  • Sawing (AREA)

Claims (8)

  1. Scie murale (11), comprenant :
    - une broche d'entraînement (33), qui est montée à rotation autour d'un axe de rotation (19),
    - un moteur d'entraînement (31) et un dispositif de transmission, qui relie le moteur d'entraînement (31) à la broche d'entraînement (33), le dispositif de transmission étant agencé au moins partiellement dans un boîtier de bras de scie (35),
    - une lame de scie (17), qui est fixée à un bras de scie (18) et qui peut être tournée par la broche d'entraînement (33) dans une direction de rotation (26) autour de l'axe de rotation (19),
    - une bride de lame de scie (25), la lame de scie (17) pouvant être agencée sur la broche d'entraînement (33) de manière immobile en rotation au moyen de la bride de lame de scie (25), et
    - un dispositif de verrouillage (41), la bride de lame de scie (25) pouvant être déplacée entre un état verrouillé et un état déverrouillé au moyen du dispositif de verrouillage (41), la bride de lame de scie (25) étant reliée à la broche d'entraînement (33) de manière immobile en rotation à l'état verrouillé et la bride de lame de scie (25) pouvant être déplacée par rapport à la broche d'entraînement (33) à l'état déverrouillé,
    caractérisée en ce que la broche d'entraînement (33) est bloquée dans la direction de rotation (26) de la lame de scie (17) à l'état déverrouillé de la bride de lame de scie (25) et peut être tournée autour de l'axe de rotation (19) dans une direction contraire opposée à la direction de rotation (26).
  2. Scie murale selon la revendication 1, caractérisée en ce que la scie murale (11) présente une unité d'avancement motorisée (13) munie d'un chariot de guidage (23) et d'un moteur d'avancement (36), une tête de scie (15) étant agencée sur le chariot de guidage (23) et pouvant être déplacée par le moteur d'avancement (36) le long d'un rail de guidage (12) dans une direction d'avancement (24).
  3. Scie murale selon la revendication 1, caractérisée en ce que le dispositif de verrouillage (41) présente une tige de traction (42), qui est guidée à l'intérieur de la broche d'entraînement (33), et un premier élément de liaison (44), et la bride de lame de scie (25) présente un deuxième élément de liaison (45), le premier et le deuxième élément de liaison (44, 45) pouvant être reliés à force et/ou par complémentarité de forme.
  4. Scie murale selon la revendication 3, caractérisée en ce que le premier et le deuxième élément de liaison (44, 45) sont reliés à force et/ou par complémentarité de forme à l'état verrouillé.
  5. Scie murale selon la revendication 1, caractérisée en ce que la scie murale (11) comprend un dispositif d'unité de sécurité.
  6. Scie murale selon la revendication 5, caractérisée en ce que le dispositif d'unité de sécurité comprend un levier (48), un cliquet (51) et un élément d'axe, qui relie entre eux le levier (48) et le cliquet (51).
  7. Scie murale selon la revendication 6, caractérisée en ce que le levier (48) est peut être déplacé entre une première et une deuxième position d'extrémité à l'état verrouillé de la bride de lame de scie (25), le cliquet (51) bloquant une transmission de couple dans la direction de rotation (26) de la lame de scie (17) dans la première position d'extrémité du levier (48) et la libérant dans la deuxième position d'extrémité du levier (48).
  8. Scie murale selon la revendication 7, caractérisée en ce que le cliquet (51) bloque, à l'état déverrouillé de la bride de lame de scie (25), une rotation de la broche d'entraînement (33) dans la direction de rotation (26) de la lame de scie (17) et la libère dans la direction contraire opposée à la direction de rotation (26).
EP18807378.7A 2017-12-22 2018-11-29 Scie murale dotée d'un dispositif de verrouillage Active EP3727770B1 (fr)

Applications Claiming Priority (2)

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
PCT/EP2018/083004 WO2019120925A1 (fr) 2017-12-22 2018-11-29 Scie murale dotée d'un dispositif de verrouillage

Publications (2)

Publication Number Publication Date
EP3727770A1 EP3727770A1 (fr) 2020-10-28
EP3727770B1 true EP3727770B1 (fr) 2022-03-23

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 Before (1)

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

Country Status (3)

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

Families Citing this family (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

Family Cites Families (12)

* 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
DE19601522A1 (de) 1996-01-17 1997-07-24 Hilti Ag Wandsäge und Sägeblatt
CN101960696A (zh) * 2008-02-29 2011-01-26 胡斯华纳有限公司 电锯通信
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

Also Published As

Publication number Publication date
US11597117B2 (en) 2023-03-07
US20200376704A1 (en) 2020-12-03
EP3501766A1 (fr) 2019-06-26
WO2019120925A1 (fr) 2019-06-27
EP3727770A1 (fr) 2020-10-28

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