DE102005008628A1 - Circular saw has saw blade rotatable by hydraulic drive circuit and a brake device which during braking separates pressure flow consumer from pressure line - Google Patents

Circular saw has saw blade rotatable by hydraulic drive circuit and a brake device which during braking separates pressure flow consumer from pressure line

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Publication number
DE102005008628A1
DE102005008628A1 DE200510008628 DE102005008628A DE102005008628A1 DE 102005008628 A1 DE102005008628 A1 DE 102005008628A1 DE 200510008628 DE200510008628 DE 200510008628 DE 102005008628 A DE102005008628 A DE 102005008628A DE 102005008628 A1 DE102005008628 A1 DE 102005008628A1
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DE
Germany
Prior art keywords
pressure
braking device
characterized
circuit
braking
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.)
Granted
Application number
DE200510008628
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German (de)
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DE102005008628B4 (en
Inventor
Stefan Frey
Original Assignee
Stefan Frey
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Application filed by Stefan Frey filed Critical Stefan Frey
Priority to DE200510008628 priority Critical patent/DE102005008628B4/en
Publication of DE102005008628A1 publication Critical patent/DE102005008628A1/en
Application granted granted Critical
Publication of DE102005008628B4 publication Critical patent/DE102005008628B4/en
Application status is Expired - Fee Related legal-status Critical
Anticipated expiration legal-status Critical

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/02Systems essentially incorporating special features for controlling the speed or actuating force of an output member
    • F15B11/04Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed
    • F15B11/0406Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed during starting or stopping
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23DPLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D47/00Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts
    • B23D47/12Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts of drives for circular saw blades
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B27WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27BSAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B5/00Sawing machines working with circular or cylindrical saw blades; Components or equipment therefor
    • B27B5/29Details; Component parts; Accessories
    • B27B5/38Devices for braking the circular saw blade or the saw spindle; Devices for damping vibrations of the circular saw blade, e.g. silencing
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00Circuits for servomotor systems
    • F15B2211/20Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205Systems with pumps
    • F15B2211/2053Type of pump
    • F15B2211/20538Type of pump constant capacity
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00Circuits for servomotor systems
    • F15B2211/30Directional control
    • F15B2211/305Directional control characterised by the type of valves
    • F15B2211/30505Non-return valves, i.e. check valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00Circuits for servomotor systems
    • F15B2211/30Directional control
    • F15B2211/305Directional control characterised by the type of valves
    • F15B2211/30525Directional control valves, e.g. 4/3-directional control valve
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00Circuits for servomotor systems
    • F15B2211/30Directional control
    • F15B2211/31Directional control characterised by the positions of the valve element
    • F15B2211/3122Special positions other than the pump port being connected to working ports or the working ports being connected to the return line
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00Circuits for servomotor systems
    • F15B2211/30Directional control
    • F15B2211/31Directional control characterised by the positions of the valve element
    • F15B2211/3138Directional control characterised by the positions of the valve element the positions being discrete
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00Circuits for servomotor systems
    • F15B2211/30Directional control
    • F15B2211/32Directional control characterised by the type of actuation
    • F15B2211/321Directional control characterised by the type of actuation mechanically
    • F15B2211/324Directional control characterised by the type of actuation mechanically manually, e.g. by using a lever or pedal
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00Circuits for servomotor systems
    • F15B2211/50Pressure control
    • F15B2211/505Pressure control characterised by the type of pressure control means
    • F15B2211/50509Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means
    • F15B2211/50518Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using pressure relief valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00Circuits for servomotor systems
    • F15B2211/50Pressure control
    • F15B2211/515Pressure control characterised by the connections of the pressure control means in the circuit
    • F15B2211/5159Pressure control characterised by the connections of the pressure control means in the circuit being connected to an output member and a return line
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00Circuits for servomotor systems
    • F15B2211/70Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/705Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
    • F15B2211/7051Linear output members
    • F15B2211/7052Single-acting output members
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00Circuits for servomotor systems
    • F15B2211/70Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/705Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
    • F15B2211/7058Rotary output members
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00Circuits for servomotor systems
    • F15B2211/70Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/715Output members, e.g. hydraulic motors or cylinders or control therefor having braking means
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00Circuits for servomotor systems
    • F15B2211/70Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/77Control of direction of movement of the output member
    • F15B2211/7716Control of direction of movement of the output member with automatic return

Abstract

The invention relates to a circular saw with a saw blade and a braking device for a hydraulic drive, which has a pressure flow consumer, which is connected in a first circuit with a pressure line. DOLLAR A The invention is based on the object to provide a simple design and usable circular saw and a braking device for a hydraulic drive, which can be used in other embodiments with a third-party drive. DOLLAR A The object is achieved by a circular saw in which the saw blade (1.1) is rotatable by means of a hydraulic drive circuit, and a braking device which separates the pressure flow consumer (8) from the pressure line (6) and a throttle (9) effectively in the case of braking in series with the pressure flow consumer (8) switches or connects the pressure line with a throttle (8) and a pressure-actuated retarding device (11) solved.

Description

  • The The invention relates to a circular saw with a saw blade and a braking device for a hydraulic drive which a Druckstromverbraucher comprising, connected in a first circuit to a pressure line is.
  • From boaters is required to be turned off from the operating position can be and the saw blade then comes to a standstill within 10 seconds. When driving by an electric motor, this requirement is by attaching a corresponding control element such as an on / off switch or a Emergency stop switch within reach of operating position fulfilled. It For this purpose, a brake motor or a brake switch can be used.
  • In the prior art is for this purpose, for example DE 34 27 733 A1 a circular saw with discharge brake, in which a braking device is provided for braking the saw blade, which is actuated by an electromagnet and whose brake shoes interact with the saw blade. The brake device is released together with the switching on of the electric motor and activated when switching off the electric motor.
  • The DE 35 39 841 A1 describes a resistance brake device for an armature having electric motors with generated by a field winding or a permanent magnet field, in particular for driving hand-held power tools, such as circular saws, drills, planing, milling, grinding machines, with a selectively connected via a switch to a power source power supply lines, either directly or are connected via a field winding with the armature, wherein a two-port resistance braking circuit is provided which can be connected after completion of the engine operation by means of a switching device with its terminals to the power supply lines, and the resistor brake circuit between its terminals with the rising or falling emf of the When braking in the generator mode working motor has increasing or decreasing instantaneous resistance.
  • These boaters are not for an external drive, usually a PTO drive a tractor, suitable. They each require their own motor on the circular saw.
  • at Brennholzwippkreissägen with external drive, where the power transmission by means of V-belt is considered an exception to the requirement for disconnectability From the operating position it is possible to switch off the tractor. However, combined firewood and table saws are no exception allowed.
  • From The company Posch is aware of a system that calls for disconnectability from the operating position in the case of power transmission by means of V-belt met. Two V-belt pulley halves are spring preloaded axially compressed, so that the flanks of the V-belt groove on the V-belt flanks of the V-belt. If the preload is released, the V-belts run through without resistance. The power transmission through the V-belt is interrupted. By divergence The V-belt pulley becomes a segment of the pulley to a Brake disc pressed and the saw blade braked.
  • This System is relatively expensive to produce. Furthermore, they are in operation regularly wear parts like replace the brake disc and V-belt.
  • Of the The invention is therefore based on the object, a simply constructed and suitable circular saw and a braking device for to provide a hydraulic drive, which in further embodiments can also be used with a third-party drive.
  • The The object is achieved by a Circular saw, having the features specified in claim 1, and by a Braking device having the features specified in claim 5 has dissolved.
  • advantageous Embodiments of the invention are the subject of the respective subclaims.
  • According to the invention a simple circular saw a saw blade on, which rotates by means of a hydraulic drive circuit is. Due to the hydraulic drive of the saw blade are out of the saw blade, which is connected to a hydraulic motor, and a possible hydraulic pressure generator no moving parts required. The circular saw can also be designed compact, without the driving forces consuming have to be diverted.
  • Preferably is the hydraulic drive circuit with a braking device is provided. As a result, the circular saw on an increased work safety.
  • A preferred embodiment provides in that a hydraulic pump, which can be driven by means of an electric motor or by means of a power take-off shaft, is arranged as a pressure-current generator in the drive circuit. The electric hydraulic pump allows the use of commercially available electric motors and is therefore inexpensive to use. In particular, in conjunction with an achievable from the operating position of the brake device allows driven by PTO hydraulic pump in the case of combined Brennholzwipp- and table saws the third party drive with reversible braking while still simple design of the circular saw.
  • In an alternative embodiment the drive circuit is connected to a secondary hydraulic system, For example, a hydraulic system of a tractor. This is no separate pressure generator required, one drive for one such also not. Hydraulic pump and associated oil tank, electric motor or PTO can Completely omitted.
  • Especially on the circular saw according to the invention, but also succeed on any other hydraulically driven machines a reversible deceleration to a standstill within a defined Time with low design and cost in a first embodiment in that, in the case of braking, the braking device is the pressure-flow consumer from the pressure line and a throttle effectively in series with the pressure current consumer switches. In addition to the interruption of Power supply of the drive train is the movement of the machine through the throttle immediately opposed to a resistance, causing them is slowed down.
  • A advantageous embodiment of the braking device provides, that the pressure flow consumer parallel to the pressure line via a check valve is connected to a low pressure area, wherein the check valve is permeable in the direction of the pressure current consumer. This circuit makes it possible in case of brake hydraulic fluid also from the low pressure range, whereby the braking process resulting heat is better transported and distributed.
  • advantageously, in case of braking, the braking device provides a second circuit for the pressure line and a separate third circuit in which the Druckstromverbraucher and the throttle are, forth. So it succeeds in a simple way, the first circuit and thus to interrupt the supply of energy and the existing kinetic energy of the pressure electricity consumer over the Reduce throttle.
  • A second embodiment a braking device provides that in braking the braking device separates the pressure flow consumer from the pressure line and the pressure line connects with a throttle and a pressure-actuated delay device. Also by this embodiment succeeds both on the circular saw according to the invention, but also on any other hydraulically driven machines reversible deceleration to a standstill within a defined time with low Construction and cost. Depending on the mode of action of the delay device are no wearing parts required, for example in the case of an eddy current brake.
  • advantageously, In this case, in the case of braking, the braking device provides a second circuit for the pressure line, in which the throttle and the delay device lie, and a self-contained third cycle in the the pressure current consumer is, forth. Be easy so the first cycle and thus the power supply interrupted and the delay device activated, reducing the existing kinetic energy of the pressure electricity consumer is reduced.
  • Preferably is in the embodiments mentioned a directional control valve is provided, which reversibly for separating the first Circulation and establishing the second circuit and the third Circulation serves. The directional valve allows in the form of a single Component reversible, simultaneous disconnection, switching and manufacturing hydraulic circuits with a single mechanical movement that can also be triggered by hand. There are no wearing parts required.
  • In an advantageous embodiment, the throttle is a pressure relief valve educated. It is a wear-free, cost-effective Component.
  • A sees particularly preferred embodiment before that the brake case can be triggered by a switch, which is arranged in the region of an operating position. Thereby the safety at work is high and the operated machine is in accordance with the regulations Operating position off can be switched off.
  • A high safety of the hydraulically driven system is achievable by the brake case by proximity detectors as light barriers, motion detectors or electrical contacts can be triggered. These proximity detectors are preferably arranged in the work area of the plant to there located or approaching Protect people.
  • Conveniently, the pressure line of the hydraulic drive is connected to a pressure generator or to a secondary hydraulic system. The pressure generator can in turn be advantageously powered by an electric or gasoline engine or a PTO. These parts and a separate oil tank can be omitted if an external hydraulic system can be connected, for example on a tractor.
  • For certain Applications, for example in vehicles, is an advantageous one embodiment provided in which the throttle is variably adjustable. extreme delay moments are thereby avoidable.
  • The Invention will be explained below with reference to exemplary embodiments.
  • To demonstrate:
  • 1 a circular saw in parallel perspective view,
  • 2 . 3 Braking devices with own pressure generation,
  • 4 . 5 Braking devices with external pressure power generation and
  • 6 a braking device with a separate deceleration device.
  • In the 1 illustrated circular saw 1 is hydraulically driven. The saw blade 1.1 is about the wave 1.2 and a dog clutch 1.3 mechanically with a hydraulic motor 1.4 connected, which acts within the hydraulic drive as Druckstromverbraucher. The hydraulic motor 1.4 is via hydraulic lines 1.5 . 1.6 with a pressure relief valve 1.7 connected, which in the case shown directly to a 4/2 way valve 1.8 connected. This is via a hydraulic line 1.9 with a pressure generator and a hydraulic line 1.10 connected to a not shown oil tank. The combination of pressure relief valve 1.7 and directional valve 1.8 serves as a braking device 2 for the circular saw 1 , During operation, the pressure generator drives the hydraulic motor 1.4 and with it the saw blade 1.1 at. Will the directional valve 1.8 actuated, the energy supply to the hydraulic motor 1.4 interrupted and a closed hydraulic circuit between the hydraulic motor 1.4 and pressure relief valve 1.7 created so that they are connected in series. This will be the hydraulic motor 1.4 including the saw blade 1.1 braked within 10 seconds. The pressure generator is not shown here, it is a hydraulic pump, which is driven by an electric motor.
  • 2 shows a detailed illustration of a circuit diagram of a braking device 2 , It is functionally consistent with the exception of the pressure generator 1 described braking device 2 match. The braking device 2 , which is mounted on a machine with a rotating tool, has a hydraulic pump as a pressure generator 3 on that by the PTO 4 a tractor is driven. The pressure generator 3 is on the one hand with an oil container 5 and on the other hand via the pressure line 6 with a first connection 7.1 a 4/2 way valve 7 connected. A second connection 7.2 of the directional valve 7 is as a return to the oil tank 6 connected. The 4/2 way valve 7 is mounted as an actuator within reach of the operating position. The braking device 2 thus fulfills the function of a brake motor.
  • In the first position of the directional control valve 7 is a third connection 7.3 of the directional valve 6 is with the input of a pressure electricity consumer 8th connected in the form of a hydraulic motor and a fourth connection 7.3 is at the output of the pressure electricity consumer 8th connected. Pressure power generator 3 and Druckstromverbraucher 8th form a first cycle. Parallel to the pressure current consumer 8th is a pressure relief valve as a throttle 9 connected. Is the directional valve 7 as shown in its second position, so is its first connection 7.1 directly to the second port 7.2 connected so that the pressure generator 3 in a separate second circuit with the oil tank 5 lies. The first cycle is interrupted. The in itself parallel circuit of the pressure electricity consumer 8th with the throttle 9 effectively becomes a series connection of the two elements by the interruption of the first circuit, which constitutes its own third circuit. The throttle 9 acts as a resistance.
  • In the first position of the 4/2 way valve 7 the hydraulic oil flows through the pressure flow consumer 8th and drives the tool. Will the 4/2 way valve 7 brought to the second position, the idle position, by an operation to the operation, the tool by the resistance, the pressure relief valve as a series-connected throttle 9 generated, braked. This happens with appropriate preload of the pressure relief valve within 10 seconds.
  • 3 shows the circuit of an alternative braking device 2 , which is preferably used to avoid waste heat problems by a small amount of oil in the closed third hydraulic circuit, which can occur with high heat generation during the deceleration process. The input of the pressure electricity consumer 8th is parallel to via the directional control valve 7 extending pressure line 6 via a check valve 10 directly with the oil container 5 , ie the low pressure area of the first circle connected. The check valve 10 is in the direction of the pressure electricity consumer 8th permeable. The throttle 9 is here from the outset in series with the pressure current consumer 8th switched and at its exit with the oil tank 5 connected, but is in the first position of the directional control valve 7 as well as the check valve 10 effectively not flowed through. Will the 4/2 way valve 7 brought by an operating action in the illustrated second position, the first circuit is interrupted and due to the inertia of the tool, the check valve 10 and the throttle 9 flows through. They form with the pressure current consumer 8th a separate, third circuit. The tool is characterized by the resistance of the pressure relief valve as a series-connected throttle 9 braked.
  • In the 4 illustrated braking device 2 Functionally corresponds essentially to the in 2 . shown However, the drive in this case is not done by the PTO of the tractor, but by its on-board hydraulic system. This allows the pressure generator 3 and the oil container 5 omitted. The 4/2 way valve 7 is in the illustrated switching state in the second position.
  • 5 shows the circuit of an alternative braking device 2 , which is preferably used to avoid waste heat problems by a small amount of oil in the closed third hydraulic circuit, which can occur with high heat generation during the deceleration process. It essentially corresponds to the circuit in 3 , but the drive is analogous to the example of 4 not by the PTO of the tractor, but by its on-board hydraulic system. This allows the pressure generator 3 and the oil container 5 omitted. The throttle 9 is on its output side and the check valve 10 connected directly to a low pressure line of the secondary hydraulic system of the tractor on its inlet side. Also in this example is the 4/2 way valve 7 in the illustrated switching state in the second position.
  • In 6 is an alternative embodiment of a braking device 2 shown. The braking device 2 , which is attached to a circular saw, is via the first and the second connection 7.1 . 7.2 a 6/2 way valve 7 connected to a secondary hydraulic system of a tractor. The directional valve 7 is mounted as an actuator within reach of the operating position. The braking device 2 thus fulfills the function of a brake motor.
  • In the first position of the directional control valve 7 is a third connection 7.3 of the directional valve 6 is with the input of a pressure electricity consumer 8th connected in the form of a hydraulic motor and a fourth connection 7.3 to the output of the pressure electricity consumer 8th connected. Is the directional valve 7 in its second position as shown, so is its first connection 7.1 with the fifth connection 7.5 and his second connection 7.2 with the sixth connection 7.6 connected so that the pressure line 6 a separate second circuit with the delay device 11 and the throttle 9 forms. The first cycle is interrupted. The third and the fourth connection 7.3 . 7.4 the directional valve 7 are directly connected to each other, so that the pressure current consumer 8th short circuited in a third circuit.
  • In the first position of the 4/2 way valve 7 the hydraulic oil flows through the pressure flow consumer 8th and drives the saw blade of the circular saw. If the working machine is to be braked, the directional control valve 7 actuated. As a result, the power supply to the saw blade is interrupted and to the delay device 11 redirected in the form of a disc brake. The brake pad is on the friction surface 12 the shaft of the saw blade and delays its movement to a stop. Instead of a disc brake any mechanical or electrical deceleration devices can be used, for example a drum brake or an eddy current brake, possibly corresponding converter are required, so that the delay device responds to pressure actuation.
  • A braking device according to the invention 2 , In particular, in one of the embodiments shown by way of example, can be used with any machine with hydraulic drive. In extended embodiments, the invention can also be used for hydraulic drives, in which the drive direction, in particular the direction of rotation is reversible. Preferably, in the case of braking, the machine is decelerated independently of the current direction of rotation.
  • For some applications, it is advantageous if the braking device 2 is controllable in terms of the strength of the deceleration, such as for hydraulic vehicle drives. This can be done, for example, by a variably adjustable throttle 9 be achieved. The degree of deceleration may then be controlled, inter alia, by means of a throttle connected to the throttle or a control lever.
  • In particular, in stationary systems with hydraulic drive high security for operating personnel can be achieved by the braking device 2 can be triggered by proximity detectors. The braking event can be initiated, for example, by photocells or electrical contacts on doors, when people get into the vicinity of critical areas of the system. Also kapa Zitive proximity detectors, which identify a touch of a surface of the plant or a machine and then trigger the braking event, are conceivable.
  • A hydraulic drive with a braking device according to the invention 2 can also be used to set a large flywheel with a small drive unit in motion, such as a flywheel. The energy stored in this way can be used to allow short term peak loads on the work machine.
  • 1
    circular saw
    1.1
    sawblade
    1.2
    wave
    1.3
    claw clutch
    1.4
    hydraulic motor
    1.5 1.6
    hydraulic lines
    1.7
    Pressure relief valve
    1.8
    way valve
    1.9 1.10
    hydraulic lines
    2
    braking means
    3
    Pressure power generator
    4
    PTO
    5
    oilcontainer
    6
    pressure line
    7
    way valve
    7.1 7.2, 7.3, 7.4, 7.5, 7.6
    connections
    8th
    Pressure electricity consumers
    9
    throttle
    10
    check valve
    11
    delay means

Claims (15)

  1. Circular saw ( 1 ) with a saw blade ( 1.1 ), characterized in that the saw blade ( 1.1 ) is rotatable by means of a hydraulic drive circuit.
  2. Circular saw ( 1 ) according to claim 1, characterized in that the hydraulic drive circuit with a braking device ( 2 ) is provided.
  3. Circular saw ( 1 ) according to claim 1 or 2, characterized in that as Druckstromzeuger ( 3 ) In the drive circuit, a hydraulic pump is arranged, which is drivable by means of an electric motor or by means of a PTO shaft.
  4. Circular saw ( 1 ) according to claim 1 or 2, characterized in that the drive circuit is connected to a secondary hydraulic system.
  5. Braking device ( 2 ) for a hydraulic drive, which a Druckstromverbraucher ( 8th ), which in a first circuit with a pressure line ( 6 ), in particular for driving a circular saw ( 1 ) according to one of claims 1 to 4, characterized in that in case of braking, the braking device ( 2 ) the pressure current consumer ( 8th ) from the pressure line ( 6 ) and a throttle ( 9 ) effectively in series with the compressed-flow consumer ( 8th ) switches.
  6. Braking device ( 2 ) according to claim 5, characterized in that the pressure current consumer ( 8th ) parallel to the pressure line ( 6 ) via a check valve ( 10 ) is connected to a low-pressure region, wherein the check valve ( 10 ) in the direction of the pressure electricity consumer ( 8th ) is permeable.
  7. Braking device ( 2 ) according to claim 5 or 6, characterized in that in the case of braking, the braking device ( 2 ) a second circuit for the pressure line ( 6 ) and a separate third circuit in which the pressure current consumer ( 8th ) and the throttle ( 9 ), manufactures.
  8. Braking device ( 2 ) for a hydraulic drive, which a Druckstromverbraucher ( 8th ), which in a first circuit with a pressure line ( 6 ), in particular for driving a circular saw ( 1 ) according to one of claims 1 to 4, characterized in that in case of braking, the braking device ( 2 ) the pressure current consumer ( 8th ) separates from the pressure line and the pressure line with a throttle ( 8th ) and a pressure-actuated retarding device ( 11 ) connects.
  9. Braking device ( 2 ) according to claim 8, characterized in that in the case of braking, the braking device ( 2 ) a second circuit for the pressure line ( 6 ), in which the throttle ( 9 ) and the delay device ( 11 ), and a self-contained third circuit in which the pressure current consumer ( 8th ), manufactures.
  10. Braking device ( 2 ) according to claim 7 or 9, characterized by a directional control valve ( 7 ) which reversibly serves to disconnect the first circuit and establish the second circuit and the third circuit.
  11. Braking device ( 2 ) according to one of claims 5 to 10, characterized in that the throttle ( 9 ) is designed as a pressure relief valve.
  12. Braking device ( 2 ) according to one of claims 5 to 11, characterized in that the braking case can be triggered by a switch, which is arranged in the region of an operating position.
  13. Braking device ( 2 ) according to one of Ansprü che 5 to 12, characterized in that the braking event can be triggered by proximity detectors.
  14. Braking device according to one of claims 5 to 13, characterized in that the pressure line ( 6 ) with a pressure generator ( 3 ) or connected to a secondary hydraulic system.
  15. Braking device according to one of claims 5 to 14, characterized in that the throttle ( 9 ) is variably adjustable.
DE200510008628 2005-02-25 2005-02-25 Circular saw with hydraulic drive Expired - Fee Related DE102005008628B4 (en)

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DE200510008628 DE102005008628B4 (en) 2005-02-25 2005-02-25 Circular saw with hydraulic drive

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DE200510008628 DE102005008628B4 (en) 2005-02-25 2005-02-25 Circular saw with hydraulic drive

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DE102005008628B4 DE102005008628B4 (en) 2008-05-15

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013002039A1 (en) * 2013-02-07 2014-08-07 Binderberger Maschinenbau Gmbh Double drive for working machine e.g. circular saw for use in agriculture or forestry, has mechanical brake that is connected to motor and is switched on by operating control device to halt working machine
AT515954A1 (en) * 2014-07-10 2016-01-15 Binderberger Maschb Gmbh Double drive with rapid shutdown

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2946547A1 (en) * 1979-11-17 1981-05-27 Wimschneider Franz Circular saw with alternative power drive - has releasable coupling and linkage allowing driving from own motor or from tractor
DE3427733A1 (en) * 1984-07-27 1986-01-30 Reich Maschf Gmbh Karl Circular saw with a run-down brake
DE3539841A1 (en) * 1985-09-04 1987-03-12 Schroecker Rainer Resistance braking device
DE69819952T2 (en) * 1997-03-10 2004-11-11 Clark Equipment Co. Additional device for a driven device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2946547A1 (en) * 1979-11-17 1981-05-27 Wimschneider Franz Circular saw with alternative power drive - has releasable coupling and linkage allowing driving from own motor or from tractor
DE3427733A1 (en) * 1984-07-27 1986-01-30 Reich Maschf Gmbh Karl Circular saw with a run-down brake
DE3539841A1 (en) * 1985-09-04 1987-03-12 Schroecker Rainer Resistance braking device
DE69819952T2 (en) * 1997-03-10 2004-11-11 Clark Equipment Co. Additional device for a driven device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013002039A1 (en) * 2013-02-07 2014-08-07 Binderberger Maschinenbau Gmbh Double drive for working machine e.g. circular saw for use in agriculture or forestry, has mechanical brake that is connected to motor and is switched on by operating control device to halt working machine
DE102013002039B4 (en) * 2013-02-07 2014-12-11 Binderberger Maschinenbau Gmbh Double drive with rapid shutdown
AT515954A1 (en) * 2014-07-10 2016-01-15 Binderberger Maschb Gmbh Double drive with rapid shutdown
AT515954B1 (en) * 2014-07-10 2016-03-15 Binderberger Maschb Gmbh Double drive with rapid shutdown

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