• 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 thermally actuated disconnect coupling includes a coupling shaft normally connected between a drive member and a driven member to transmit torque from the drive member to the driven member. Within the driven member, a fusible element such as a eutectic pellet supports the coupling shaft against axial movement during normal in-service use of the coupling. Providing the connection between the coupling shaft and the drive member are axially straight splines formed both on the coupling shaft and the drive member. At the other end of the coupling shaft, helical splines formed on the coupling shaft and the driven member provide means whereby torque is transmitted through the coupling shaft to driven member. The axial length of the helical splines is greater than the axial length of the straight splines. When the pellet is melted, such as by overheating, an axially directed component of the force transmitted by the helical splines propels the coupling shaft away from the drive member thereby disconnecting the drive and driven members.
    公开号:SU786929A3
    申请号:SU772535698
    申请日:1977-10-14
    公开日:1980-12-07
    发明作者:Л. Свадли Джеральд
    申请人:Сандстрэнд Корпорейшн (Фирма)；
    IPC主号:
    专利说明:

    (54) PROTECTION COUPLING
    权利要求:
    Claims (5)
    [1]
    The invention relates to mechanical engineering, in particular, to disconnectable devices of thermal action, namely, safety clutches, and can be used in airplanes to connect the output shaft of a motor reducer with a primary drive shaft of a constant speed to stop the transmission of torque during an accident, to avoid overheating of the drive and possible serious damage to it and other elements of the aircraft. Known safety clutch, containing coaxially mounted drive and driven coupling halves. In the open from the end of the chambers of which, on the splines made on the inner surface, the connecting link 1 is mounted. It is made in the form of two bushings mounted on the rod and connected by cams located on them face adjacent surfaces. In the cavity of the driven sleeve placed fusible element. On the rod. between the bushings is a spring. When a lightly-fused element of the cam of the sleeve is melted, which is connected with the driven back coupling, it is disengaged from the action of the spring with the cams of the coupling half of the coupling half. The sleeve of the driven half coupling moves along the straight slots into the chamber of the driven coupling half. The sleeve half coupling at the same time is located on the slots in the chamber of the leading coupling half. This coupling is the closest technical solution to the invention. However, the known clutch has a low load capacity due to the implementation of the Schl. tsev pr mmy. The coupling does not reliably disengage the coupling halves, due to the fact that the cams of the bushings may engage with vibrations or shocks and the sleeve connected to the master coupling half by the splines and located in its chamber transmits the torque to the driven coupling half which may cause damage to the mechanisms associated with it. In addition, performed (above the connecting element in the form of two bushings with end cams mounted on the rod and installed between the spring bushings complicates installation and. Disassembly of the coupling, manufacturing technology and increases its dimensions. The purpose of the invention is to increase the load capacity, ensuring the compactness of the design and convenience of operation. For this, we offer a safety coupling containing a leading and driven coupling half with slots on the inner surface and chambers and a connecting link placed in theirs, and the low-melting safety element is equipped with a glass and a piston with a shank installed in the chamber of the driven half coupling, and the splines of one of the coupling half are spiral and the connecting link is made of a shaft coupling with a blind central hole moving along the axis of rotation and the slots spiral at one end, straight at the other, mated with the splines of the coupling halves, while the low-melting element is located in the cavity between: the cup and the piston connected by the end of the shank with the bottom of the blind central leg hole roller. At THIS: the length of the mating spiral slots of one of the coupling halves and the roller may be greater than the length of the straight slots of the other coupling half and the roller. In addition, the outer diameter of the piston can be smaller than the internal diameter of the glass, and in the latter, channels can be made connecting the chamber of the driven half coupling to the cavity of the glass at the location of the low-melting element, which can be made in the form of a briquette of solder. The clutch can f be fitted with a disc mounted on the bottom. blind central hole of the roller, and the shank may be rounded and matched with the disc. FIG. 1 shows the proposed coupling, a longitudinal section; in fig. 2 - the same, after actuation and disconnection of the coupling floor; in fig. 3 is a section A-A in FIG. 1 with a symbol coupling. The clutch. Contains the leading coupling half 1, driven 2, mounted in the housing 3 on bearings 4.5 and having; chamber 6, opening from end 7, and gear wheel 8 with external teeth. Bearings 4 and 5 fix the driven coupling half 2 in the housing 3 from axial displacements. In the chamber 6 is placed. a connecting roller 9, which is installed in the chamber 10 of the leading coupling half 1. The seal between the walls of the housing 3 and the driven coupling half 2. is provided with a sealing ring 11 pressed against the end 7 of the coupling half 2 with a snap ring 12. Between. using a retaining ring 12 and a housing 3 in the frame 13, install sealing rings O-shaped sections 14 and 15, which prevent leakage of the working fluid of a constant speed drive from the housing 3. During operation, the axial movement of the connecting roller 9 is prevented by a fusible element, for example, a cylindrical briquette 16, made of a fusible material, such as solder. At the end 17 of the connecting roller 9 and on the inner surface 18 of the driven half coupling 2, the spiral tongs 19 and 20 can be made. The splines 19 are external, and the splines 20 extend axially into the chamber 6. The splines 19 and 20 should preferably be chamfered such a direction as to. shift the roller 9 to the fusible briquette 16 during the operation of the coupling. The retaining ring 21 prevents the roller 9 from moving in the opposite direction. At the end 22 of the connecting roller 9 and on the inner surface 23 of the leading coupling half 1, the straight splines 24 and 25 are filled. The length of the splines 24 is smaller than the length of the splines 19 to ensure complete separation of the end 22 of the roller 9 and the leading coupling half 1. In chamber 6 of the driven half coupling 2 a cup 26 and a piston 27 is placed in it. The low-melting briquette 16 is located between the cup 26 and the piston 27. The piston 27 has a shank 28 extending from the cup 26 into the central blind hole 29 of the connecting roller 9. The diameter of the piston. 27 is smaller than the inner diameter of the cup 26; therefore, a gap is formed between the piston 27 and the cup 26, which passes into the channel 30, through which liquid solder flows out, which appears when the briquette 16 is melted. In addition, channels 31 and 32 are made in the glass 26, ;. also serving for the flow of liquid solder from the cylinder into the chamber 6 of the driven coupling half 2. The piston end face is filled with rounded. In particular, this end has a hemispherical shape and interacts with the end surface 33 of the disk 34, whereby the piston can be tilted relative to the connecting roller 9. This prevents the piston 27 from vibrating and tilting the outer end of the briquette 16 if there is some misalignment between the half coupling. 1 and driven 2. The clutch works as follows. The leading coupling half 1: the connecting roller 9 transmits the torque to the driven coupling half 2. When the allowable torque value is exceeded, the driven coupling coupling 2 stops abruptly, which causes a large amount of heat and warming up the driven coupling half 2. The solder briquette 16 melts and flows through the channels 30 and 31 into the chambers 6. The connecting roller 9 continues to rotate with the leading coupling half 1 and under the action of the axial force of the spiral slots 19 and 20 moves inwardly into the chamber 6 of the driven semi-. coupling 2 to contact with its bottom. As shown in FIG. 2, the spiral screws 19 and 20 are completely separated, and since the slots 19 and 20 interact with each other at a greater length than the splines 24 and 25, the connecting roller 9 is retracted from the drive coupling half 1 at a considerable distance. In addition, in the disengagement process, the splines 24 and 25 force the connecting roller 9 to rotate, therefore, after disengagement, the splines 19 and 20 do not coincide. Due to this mismatch of the splines 19 and 20, the roller 9 is kept from reverse movement to the leading coupling half 1, which may occur due to vibration. Thus, due to the proposed ratio of the sizes of the spiral slots 19 and 20 and the straight slots 24 and 25, the proposed coupling does not require the use of special means in the form of a spring or other means to hold the connecting roller 9 in the disconnected position with the coupling half 1, which will strengthen the coupling. The proposed safety clutch is more compact and more powerful for its size than the known clutches similar to it. It can transmit a greater torque, providing a more powerful connection to the output shaft of the gearbox than the known safety clutch of the same size. The proposed coupling uses a spiral spline connection, which serves to transfer torque from the output shaft while the briquette of the material is solid and ensures complete separation from the output shaft when the briquette is melted. The advantage of the spiral spline connection of the roller 9 and the driven half coupling 2 is that it has a significant axial component of the force transmitted by the connecting roller 9, and this axial component during the melting of the briquette moves the connecting roller 9 in the axial direction, outputting one end 22 the connecting roller 9 from the leading coupling half 1 and another 17 roller 9 from the driven coupling half 2. Opposite end parts of the connecting roller 9 are integral with each other, therefore in the proposed coupling and There are fewer individual parts than in the known clutch. The aspect ratio of the spiral-spline and straight-spline connection is such that it eliminates the need for means to keep the coupling parts at a distance from the drive coupling half when the connecting roller 9 is pulled out of the coupling sleeve 1. In addition, due to the special ratio of the lengths of the helical splines 19 and 20 and a straight line spline 24 and 25, ensured complete separation of the connecting roller 9 and the leading coupling half 1 when the solder of the briquette 16 is melted. Invention 1. Safety clutch, with Holding a driven and driving half coupling with slots on the inner surface and chambers and a connecting link placed in the chambers, as well as a low-melting safety element, which, in order to increase the load capacity, ensure the compactness of the design and ease of operation, it is equipped with a slave installed in the chamber the cup and the piston located in it with the shank, and the splines. one of the half-legs is made spiral and the connecting link is made in the form of a roller moving along the axis of rotation with a blind central hole and slots spiral1 on one end, straight on the other side, coupled with half-coupling slots, while the low-melting element is placed in the cavity between the cup and the piston connected with the tail end of the roller with the bottom of the blind central hole of the roller .
    [2]
    2. The safety clutch of claim 1, wherein the length of the mating helical splines of one of the coupling halves and the roller is greater than the length of the straight slits of the other coupling half and the roller.
    [3]
    3. The safety coupling according to claims 1 and 2, characterized in that the outer diameter of the piston is smaller than the internal diameter of the glass, and in the latter there are channels connecting the chamber, the driven coupling half with the cavity of the glass at the location of the low-melting element.
    [4]
    4. Safety clutch according to claims. 1-3, characterized in that. .THE the fusible element is designed as a briquette of solder. .
    [5]
    5. A safety coupling according to nn.I - 4, characterized in that it is provided with a disk mounted on the bottom of a blind central opening of the roller, and the end of the piston shank is rounded and fitted to the disk. Sources of information taken into account in the examination 1. US patent N "3889789, cl. 192-82, 1975.
    类似技术:
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    同族专利:
    公开号 | 公开日
    DE2743941C2|1987-11-05|
    DE2743941A1|1978-04-20|
    JPS6041256B2|1985-09-14|
    FR2367944B1|1985-05-24|
    IL53059A|1981-11-30|
    IL53059D0|1977-12-30|
    JPS5349656A|1978-05-06|
    IT1090931B|1985-06-26|
    FR2367944A1|1978-05-12|
    US4086991A|1978-05-02|
    GB1549121A|1979-08-01|
    CA1061126A|1979-08-28|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US2539534A|1949-11-23|1951-01-30|Phillips Petroleum Co|Safety coupling device|
    DE1134857B|1956-01-23|1962-08-16|Borg Warner|Safety friction clutch with temperature-dependent control|
    US3064454A|1961-06-06|1962-11-20|Sharples Corp|Overload release coupling|
    US3212613A|1962-07-06|1965-10-19|Sundstrand Corp|Thermal disconnect|
    CH563539A5|1973-03-02|1975-06-30|Maag Zahnraeder & Maschinen Ag|
    US3889789A|1974-04-15|1975-06-17|Mc Donnell Douglas Corp|Thermal fuse mechanical disconnect|FR2361576B1|1976-08-14|1983-05-27|Lucas Ind Plc|
    US4537578A|1977-08-12|1985-08-27|Lucas Industries Limited|Couplings|
    JPS54160591U|1978-04-28|1979-11-09|
    US4271947A|1978-11-13|1981-06-09|General Electric Company|Thermal fuze mechanical disconnect eutectic containment|
    DE2932258C2|1979-08-09|1983-02-24|Mannesmann AG, 4000 Düsseldorf|Disconnect clutch|
    US4610597A|1983-10-06|1986-09-09|Intelledex Incorporated|Gripper interface for a robot|
    US4934977A|1985-11-07|1990-06-19|Sundstrand Corporation|Thermal disconnect coupling|
    US4997072A|1989-08-21|1991-03-05|Sundstrand Corporation|Rotating concentric shaft disconnect actuating mechanism for an integrated drive generator|
    US5103949A|1990-11-08|1992-04-14|Sundstrand Corporation|Thermal disconnect|
    FR2733286B1|1995-04-19|1997-07-11|Aerospatiale|DEVICE FOR CONTROLLING ESCAMOTATION OF A MOBILE STRUCTURE|
    DE19547351A1|1995-12-19|1997-06-26|Dbt Gmbh|Drive station for chain scraper conveyor used in underground mines|
    US6595893B1|1999-03-26|2003-07-22|Teijin Seiki Co., Ltd.|Freeing mechanism for motorized gear reducer|
    GB0016178D0|2000-06-30|2000-08-23|Lucas Industries Ltd|Thermal disconnect|
    US6364772B1|2000-08-22|2002-04-02|Hamilton Sundstrand Corporation|Disconnect for high-speed rotating shafts|
    GB0101859D0|2001-01-24|2001-03-07|Lucas Industries Ltd|A thermal disconnect device|
    FR2827927B1|2001-07-27|2003-10-17|Thales Sa|CRABOT COUPLING DEVICE|
    US20030047402A1|2001-09-13|2003-03-13|Borgen Wayne Lee|Dual disconnect drive assembly|
    FR2833666B1|2001-12-14|2004-02-27|Thales Sa|CRABOT COUPLING DEVICE|
    DE10361440B4|2003-12-23|2015-08-06|Voith Turbo Gmbh & Co. Kg|Hydrodynamic fluid machine with closure with thermal safety function|
    GB0820232D0|2008-11-05|2008-12-10|Goodrich Control Sys Ltd|Releasable drive arrangement|
    FR2952687B1|2009-11-18|2012-01-06|Hispano Suiza Sa|DEVICE FOR DISENGAGING LOADED SHAFTS FOR POWER TRANSMISSION BOX|
    US9574618B2|2014-11-20|2017-02-21|Hamilton Sundstrand Corporation|Thermal disconnect assembly with flight control permanent magnet generator for integrated drive generator|
    EP3185403A1|2015-12-23|2017-06-28|Siemens Aktiengesellschaft|Permanently excited synchronous machine with automatic rotor decoupling in winding short circuit|
    US10316898B2|2016-01-28|2019-06-11|Ge Aviation Systems Llc|Method and disconnector for disconnecting a drive shaft|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    US05/732,249|US4086991A|1976-10-14|1976-10-14|Thermally actuated disconnect coupling|
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