• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A gearing unit has an input shaft coupled via a gear train and a clutch to an output shaft which can propel a drive chain for a mineral winning machine or plough. The clutch is released by hydraulic pressure and a load sensor operates a valve device to release the clutch should an excessive load occur. The response of the hydraulic system is optimised by using a special fast-switching valve device and by maintaining a certain pressure in a release chamber of the clutch by circulating pressure fluid through the valve device when the clutch connects the drive to the output shaft. This pressure is lower than that necessary to release the clutch and the valve device rapidly switches to increase the pressure should an overload occur.
    公开号:SU1400516A3
    申请号:SU833677026
    申请日:1983-12-19
    公开日:1988-05-30
    发明作者:КУССЕЛЬ Вилли；Боле Вернер
    申请人:Геверкшафт Эйзенхютте Вестфалия (Фирма)；
    IPC主号:
    专利说明:

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    forged coupling 4, hydraulic actuator with a cylindrical cavity 11, 14 under-; water of the working medium with the creation element in the last preliminary; pressure in the form of a cooling tube: 17 and throttle 20 solenoid switching valve (K) 22, for example, with two-nozzle a pre-pressure control stage and an electronic control unit with a signal receiver and a measuring elastic element. By 22, it was installed in the form of a servo valve with a maximum switching time of 20 ms. And mounted on the node 14 for supplying the working medium. The cooling tube 1 7 is located in the axial channel 16 and communicates with K 22. The axial channel 16 communicates with the cavity 11, the working fluid supply unit 14 is located on the shaft 3 from the coupling 4 side. The cavity 11 can be made annular and concentric with the shaft 3. Transmission may have a device 23 for pumping out the working medium from the hydraulic drive. In the event of an overload, the coupling 4 is first disconnected by a load of K 22. Then it is briefly closed by the electronic control unit. This allows control of its discharge rate. 4 hp f-ly, 2 ill.
    one
    The invention relates to engineering, in particular, to devices for driving coal plows.
    The purpose of the invention is to increase the reliability of the transmission in operation by reducing the time of operation and reducing its size.
    FIG. 1 shows a transmission with overload protection, a horizontal section in FIG. 2 - rotary coupling input.
    The transmission is preferably intended for chain drives, in particular, for the drive of a coal plow 1C chain thrust. In case 1, there are input | 2 and output 3 shafts, kinematically connected to each other. : At the end of the output shaft 3, a safety friction disc clutch 4 is installed. The output shaft 3 is driven from the driven input shaft 2 via cylindrical gears arranged in the transmission casing and the coupling 4. In this case, the drive is carried out through the sleeve 5 installed on the output shaft 3, connected to the ring-shaped outer holder 6 of the clutch disk 4 and concentrically located in it. The internal holder 7 of the disk clutch 4, stationary with the possibility of joint rotation connected to the end of the output shaft 3, for example, through small-face connection. The disks 8 and 9 of the coupling 4 are alternately stationary with the possibility of joint rotation, but movably in the axial direction are connected to the holders 6 and 7. The coupling 4 is closed by axially acting packages of the disk springs 10 and is hydraulically opened. This is carried out hydraulically with an annular cylindrical cavity 11 connected through radial channels 12, made in the form of radial holes, with a stepped axial hole 13 on
    the end of the output code 3.
    The axial bore 13 includes a fixed rotating unit for supplying the working medium, mounted on a gear flanged to the body 1.
    on the outer side of the attachment body 15. The rotary inlet 14 has an axial channel 16 with a concentric cooling tube 17 held therein, the inside end 18 of which is connected to the internally located end of the axial channel 16. The axial channel 16 is connected through a radial hole 19 to the supply pipe - house of working fluid. Cooling
    pipe 17 is inserted from the axial channel 16 and is connected to the drain capacity of the hydraulic system. The cooling tube 17 is installed by means of a threaded joint. The throttle 20 is also located in this place. In normal operation, the hydraulic
    the rotational injection system 14 and the cylindrical cavity 11 are maintained at a certain pre-pressure equal to, for example, 8-15 bar
    The overload signal receiver is made in the form of a measuring finger 21, which is included in the kinematic chain of transmission in such a way that during operation it is loaded within the limit of its elastic deformability. Measuring finger 21 can be easily replaced by placing it in a pocket or in a hole. In this case, it is installed between the sleeve 5 and the holder 6. The measuring finger 21 has at least one strain gauge strip (not shown), which undergoes expansion during the elastic deformation of the finger 21. An overload signal from a finger 21 is transmitted through a contactless receiver, receiving load-dependent output signals of one or several tensometric strips and supplying them to an electronic control device (not shown), to a control clutch 4. I.
    In order for the response time of the overload protection to be shorter (approximately 25 m), the hydraulic system of the stationary rotary inlet 14 and the cylindrical cavity 11 of the coupling is pumped out and then held at constant hydraulic prestress. A switching valve 22 is used for switching on the coupling 4, the maximum switching time of which is 20 ms, but preferably it is less than 10 ms. Such short switching times are known by magnetically actuated servovalves with a hydraulic pre-amplification stage. These valves operate with zero flow, i.e. with constant fluid circulation in the zero position of the valve. The zero flow is used to maintain the hydraulic circulation of the working fluid in the rotary entry system 14 and the cylindrical cavity 11 of the coupling, while the throttle 20 on the working medium discharge line maintains a certain pre-pressure in this system. FIG. 2, the circulation circuit of the working fluid in the system is indicated by arrows. The rotary inlet channels 14 are connected to both outputs A and B of the switching solenoid valve 22, while its inputs C and D are connected to the hydraulic pressure system. As shown in FIG. 1, the switching valve 22 is mounted directly on the protruding end of the rotary inlet 14, so that the smaller liquid connecting lines to the rotary inlet system and the cylindrical cavity of the coupling are provided.
    Valve 22 may be configured with a dual nozzle pre-pressure control stage (not shown).
    A finger 21, through a contactless receiver of measuring magnitude, sends electrical signals proportional to the corresponding load condition on the electronic device. This device is connected to the solenoid of the switching valve 22. In case of overload, the switching valve 22 immediately switches the cylindrical cavity 11 of the coupling 4 through the hydraulic system of the rotary input 14 to hydraulic pressure compared to the pre-stress pressure, under the action of which the force develops, against spring tension 10, and coupling 4
    off. I
    Sensitivity srabatse
    The overload protection according to the invention can be even more so due to the fact that the cylindrical cavity 11 of the coupling 4 is evacuated. For this purpose, a pumping device 23 in the form of a drawing screw is provided (Fig. 2), which connects the hydraulic system to the outside atmosphere through the openings. In this case, the draw screw 23 is located in the axial hole of the fixing screw 24, which is located in the threaded hole connected to the radial channels 12.
    Opening the clutch in the event of an overload is performed by the solenoid of the switching valve 22 in such a way that when the clutch is opened, excessive shocks from relieving the voltage under the plow chain tension may not occur. Such a load disconnection is achieved by an electric control device. The electric current of the electromagnet (not shown) is controlled depending on the time in such a way that when the plow is blocked in the p. Load, the clutch 4 is completely disconnected due to the full switching current of the electromagnet of the switching valve, thus short-circuiting plow chain slipping occurs clutch. Due to this, the stretching energy available in the plow chain is reduced. Since the switching valve solenoid 22 operating as a torque motor controls the stroke of the control piston of this valve 22 in direct proportion to the electrical input signal, it is possible to control the unloading speed of the clutch 4 from strong shocks when unloading the plow chain, using an additional electric device. The torque actuator control device therefore performs, within a predetermined short response time, the sliding opening of the coupling 4 in overload case.
    权利要求:
    Claims (5)
    [1]
    Invention Formula
    I. Transmission with overload protection, predominantly for coal plows, comprising a housing, input and output shafts installed in it, kinematically interconnected, a normally closed friction clutch, a hydraulic actuator with a cylindrical cavity, an electromagnetic switching valve, located between the input and the output shafts,. a signal receiver of the measuring element, an electronic control unit electrically connected to the signal receiver, the measuring element and the switching solenoid valve, and a working supply unit
    five
    0
    five
    0
    five
    0
    five
    medium connected to the output of the switching solenoid valve and the cylindrical cavity of the hydraulic drive through an axial channel, characterized in that, in order to increase reliability in operation by reducing the time of accumulation and reducing the size, the switching electromagnetic valve is designed as a servo valve with a maximum switching time of 20 ms and mounted on the node supplying the working medium, and the latter is made with the element of creating pre-pressure in the cylindrical cavity of the hydraulic actuator, made in the form of races Assumption in the axial passage and communicating with it, one of the axial end of the cooling tube, the outlet end communicating with the electromagnetic switching valve, wherein the axial channel communicates with a cylindrical cavity formed in the hydraulic drive means of radial channels casing.
    [2]
    2. Transmission according to Claim 1, that is to say that the solenoid switching valve is made with a two-nozzle pre-pressure control stage in the cylindrical sleeve cavity.
    [3]
    3, Transfer by PP. 1 and 2, it is equipped with a choke mounted on the outlet end of the cooling tube.
    [4]
    4. Transfer on PP. 1 and 2, that is, that the unit for supplying the working medium is located at the end of the output shaft,
    in which the coupling is located, the axial bore, the cylindrical cavity of the hydraulic actuator is made annular and is located concentrically with the end of the output shaft.
    [5]
    5. Transfer on PP. 1 and 4, that is, with the fact that it is equipped with a working medium pumping device communicating with the cylindrical cavity of the hydraulic drive.
    i15
    ten
    类似技术:
    公开号 | 公开日 | 专利标题
    SU1400516A3|1988-05-30|Transmission with protection against overloads
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    US3488980A|1970-01-13|Torque limiting clutch
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    US3680313A|1972-08-01|Closed loop-open loop circuit for hydro-static transmissions
    US2372326A|1945-03-27|Fluid drive fob compressors
    US4293060A|1981-10-06|Electromagnetic friction clutch with overload release
    US6308812B1|2001-10-30|Clutch control valve
    US2349284A|1944-05-23|Safety device for hydraulic power transmission apparatus
    SU643096A3|1979-01-15|Friction brake
    US3180095A|1965-04-27|Hydraulic torque converter
    US3407912A|1968-10-29|Over-speed released fluid operated clutch
    SU1426460A3|1988-09-23|Mechanism with overload safety device, particularly, coal plough drive
    US2970498A|1961-02-07|Power transmission mechanism including hydraulic and friction clutches
    RU1811557C|1993-04-23|Device for drive of chain ploughing unit
    JPS59227525A|1984-12-20|Emergency pto driving equipment
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    US3373853A|1968-03-19|Hydraulically actuated mechanism
    US5971821A|1999-10-26|Shiftable disk clutch or disk brake
    SE463976B|1991-02-18|ROTATOR DEVICE PROTECTOR
    CA2316792A1|2000-05-04|Drive head for a rotary-driven rod assembly, especially for driving a sand pump
    SU745378A3|1980-06-30|Momentum hydroamplifier
    SU944702A1|1982-07-23|Drawing bench drive
    FI76034B|1988-05-31|KOPPLING FOER SKYDDNING AV MEKANISM.
    KR100337684B1|2002-05-22|Hydraulically actuated armature
    同族专利:
    公开号 | 公开日
    DE3248084A1|1984-06-28|
    FR2538490B1|1986-09-26|
    BE898528A|1984-04-16|
    GB8333886D0|1984-02-01|
    PL139654B1|1987-02-28|
    GB2133105B|1986-03-12|
    GB2133105A|1984-07-18|
    FR2538490A1|1984-06-29|
    US4682678A|1987-07-28|
    PL245308A1|1984-07-30|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    GB575522A|1944-03-08|1946-02-21|Harold Sinclair|Improvements in torque limiting means for torque transmitting mechanism|
    GB650387A|1947-06-27|1951-02-21|Zbrojovka Brno Np|Improvements in or relating to controlling agricultural tractors|
    GB746381A|1953-06-15|1956-03-14|Rolls Royce|Controlling disengageable rotating couplings|
    US2790340A|1954-09-07|1957-04-30|Mach Tool Control Corp|Work-load indicator|
    US2783628A|1955-05-31|1957-03-05|Blackstone & Co Ltd|Flexible couplings|
    US2963134A|1956-03-15|1960-12-06|Henry T M Rice|Fluid operated releasable torque transmitting apparatus|
    DE1173741B|1957-11-19|1964-07-09|Erich Herion|Pressure fluid operated clutch with overload protection|
    US3298488A|1964-09-29|1967-01-17|James A Mcdonald|Torque limiting clutch|
    US3360087A|1966-06-06|1967-12-26|Twin Disc Inc|Hydraulically actuated friction clutch having torque control means|
    GB1357563A|1971-08-12|1974-06-26|Ratcliffe Eng Co Ltd|Torque limiting tools|
    US3946837A|1974-12-26|1976-03-30|Rohr Industries, Inc.|Disc brake and actuator assembly|
    GB1504073A|1975-08-27|1978-03-15|Caterpillar Tractor Co|Annular single piston brake arrangement|
    GB1524787A|1976-03-17|1978-09-13|Eller F|Switching bearings for driven spindles of screw and nut gears or the like|
    GB1587294A|1977-06-02|1981-04-01|Dresser Europe Sa|Mining machine haulage transmission|
    DE3043237C2|1980-11-15|1989-04-27|Gewerkschaft Eisenhuette Westfalia Gmbh, 4670 Luenen, De|
    DE3105841A1|1981-02-18|1982-10-28|Towler Hydraulics GmbH, 4044 Kaarst|ELECTROHYDRAULIC PROPORTIONAL 2-WAY VALVE|
    JPS6213704Y2|1981-10-12|1987-04-08|DE3323251C2|1983-06-28|1990-09-06|Gewerkschaft Eisenhuette Westfalia Gmbh, 4670 Luenen, De|
    DE3425638C2|1984-07-12|1993-09-30|Westfalia Becorit Ind Tech|Gearbox with overload protection, in particular for driving coal planes and the like.|
    US4720929A|1986-02-14|1988-01-26|Capitol Trencher Corporation|Trenching device|
    DE3740570A1|1986-12-04|1988-06-09|Tochigi Fuji Sangyo Kk|Disc flywheel|
    DE3720208A1|1987-06-17|1988-12-29|Gewerk Eisenhuette Westfalia|Gearing with overload clutch, in particular for powerful chain drives of mining machines|
    CH682311A5|1990-04-03|1993-08-31|Bobst Sa|
    DE4119874C2|1991-06-17|1993-06-24|Deere & Co., Moline, Ill., Us, Niederlassung Deere & Co. European Office, 6800 Mannheim, De|
    DE4236519C2|1992-10-29|2003-01-16|Dbt Gmbh|Method and device for overload protection of chain drives, especially for chain-drawn coal planes and. like.|
    DE4316798C2|1993-05-19|2002-06-27|Reliance Electric Ind Co|Method for controlling motor start-up and start-up phase in drive devices for chain drives of face conveyors or planing systems and corresponding drive devices|
    US6536520B1|2000-04-17|2003-03-25|Weatherford/Lamb, Inc.|Top drive casing system|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE19823248084|DE3248084A1|1982-12-24|1982-12-24|TRANSMISSION WITH OVERLOAD PROTECTION, ESPECIALLY FOR THE DRIVE OF CARBON PLANES AND THE LIKE|
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