The safety device actuator
(57) Abstract:The invention relates to mechanical engineering and can be used in the drives of vehicles to prevent overload torque. The safety device actuator includes a motor, planetary or wave transmission having a fixed Central wheel, a stationary hollow shaft rigidly connected with the bearing, roller, lever limit switch actuator. Roller placed inside a stationary hollow shaft and one end is connected with a fixed Central wheel and the other end attached to the lever, cooperating with a limit switch actuator. Improved accuracy of the relief device under overload, increased its reliability. 2 Il. The invention relates to mechanical engineering and can be used in the drives of vehicles to prevent them from overloading the moment.Known safety device actuator containing a planetary transmission comprising two Central wheels, one external, the other internal teeth and drove with satellites, clutch, kinematically associated with a Central wheel with internal teeth, and limit switches (A. C. USSR N 1128036,the third clutch, and also a great time running after his operation at overload.Known planetary gear mechanism for detecting torque greater than the specified value, containing a friction-locked crown wheel with inner and outer teeth gear, seated on the Cam roller and being in mesh with the outer teeth of the crown wheel and the Cam, which causes actuation of the switch actuator (UK, application N 1392025, publ. April 23, 1975, N 4491, MKI 16 H 1/36) prototype.The disadvantage of this transmission mechanism for detecting torque are large radial dimensions, and low reliability of the friction elements of the transmission.An object of the invention is to improve the accuracy of the relief device under overload drive vehicles and increase its reliability.This object is achieved in that the actuator includes a motor, gear or planetary wave transmission accommodated in the housing of a driving element of the drive, such as a drum or sprocket, and having at least one stationary shaft, the ends of which are rigidly connected one with the support and drugatore also rigidly connected with the stationary Central wheel, and to the other end in favor of a support, attached to a swing arm that interacts with the switch actuator.A comparison of the proposed solution with the prototype shows that it differs from the prototype the following features:
the transmission includes a hollow stationary shaft shank;
shaft-the shaft is rigidly attached to the support and fixed to the Central wheel;
inside the shaft-shank placed platen;
the roller is fixed to a stationary Central wheel;
by the end of the roller, in favor of a support, attached to the swivel arm.Therefore, we can conclude that the proposed solution meets the criterion of "novelty."The comparison of the proposed solutions with other known solutions shows that in order to prevent overloading of the drive shaft is used-shank, shank rigidly connected to a support and a stationary Central wheel transmission, which is the reactive torque, proportional to the load on the master element of the actuator and the shaft-the shaft is made hollow, placed inside the roller rigidly connected with the stationary Central wheel, and at the end of the roller acting for support, attached to the swivel arm. Rea at an angle depending on the load on the master drive element of influence on the limit switch actuator.Therefore, we can conclude that the proposed solution meets the criterion of "inventive step".In Fig.1 and 2 shows the safety device for the drive of the chain conveyor, which in the case of the sprocket set accordingly or planetary wave transmission.The drive that hosts the safety device consists of the engine 1, the coupling 2, the planetary (see Fig.1) or wave (see Fig.2) transmission 3, the housing of the sprocket 4, the supporting pins 5, 6, supports 9, 15, fixed to the Central wheel 7 (Fig. 1. and Fig. 2) rigidly connected with the hollow shaft-shaft 8, the second end of which is connected to the support 9 of the sprocket. Inside the shaft 8 is placed a roller 10, which is connected at one end with a fixed wheel 7, and the other end fixed rotary lever 11, which interacts with a limit switch actuator 12, which is attached to the frame of the actuator 13, and to configure at maximum torque, can move relative to the roller axis in elliptical holes 14 of the frame.The device operates as follows.Torque from the engine 1 through the clutch 2 is fed to the driving shaft of the planetary (Fig. 1) or wave (Fig. 2) puredeal load on the sprocket, perceived stationary Central wheel 7, the shaft-the shaft 8 and the bearing 9 of the sprocket. Under the influence of this moment, the shaft-the shaft is twisted at a certain angle, causing the rotation of the platen 10 and the pivot arm 11, which acts on the limit switch actuator 12. The shoulder of the swivel arm is set by moving the limit switch in elliptical holes 14 of the frame 13 and is chosen in such a way that actuation of the switch and stop the engine drive happened when the torque exceeds a limit value. After elimination of the reasons that caused the overload, the rotary lever is returned to its original position. The safety device actuator, including the engine, or planetary wave transmission accommodated in the housing of a driving element of the drive and having at least one stationary shaft, and a lever cooperating with a limit switch actuator, characterized in that one end of the fixed shaft is rigidly connected to the support, and the other with a fixed Central wheel, and a stationary shaft is made hollow and placed inside the roller, one end of which is connected with a fixed Central wheel, and the other end attached keychain, four button
FIELD: engineering industry.
SUBSTANCE: wave plunger reduction gear includes movable rigid gear wheel (13), wheel interacting with it, wave generator (2) with cylinders (3) and radial channels (6) uniformly distributed in a circumferential direction, which connect each cylinder to central hole (7). Distributor (8) made in the form of shaft with working medium supply and discharge cavities (9) is installed in central hole (7). Wheel is made in the form of ring-separator (15), in the slots of which there located are radially movable prismatic plungers (14). In symmetric slots of plungers there installed is non-extendable flexible element (16). On shaft of distributor there eccentrically installed and offset in two diametrically opposite directions relative to wave generator axis are discs (22) interacting with plungers. The straight line along which discs (22) are offset, coincides with symmetry axis of distributor supply cavity. When discharging working medium from high pressure main line, plungers (14) come into contact with discs (22) and remain fixed in radial direction, thus maintaining engagement with movable wheel (13) and gear clutches (1). As a result, movable wheel (13) is reliably fixed against rotation.
EFFECT: improving operating reliability of reduction gear.
FIELD: machine building.
SUBSTANCE: gear consists of pinion rigidly coupled with shaft. The shaft is installed in a holder by means of a cleaved detachable element. The cleaved detachable element is mounted stationary by means of shrink fit between the pinion and the shaft and is designed for disconnection of the pinion from the shaft in case of maximal moment occurring between the pinion and the shaft. A reserve guiding standard element is installed to retain the pinion rotating in the holder in case of disconnection of the pinion from the shaft. The pinion gear box in the gas-turbine engine containing such gear actuates auxiliary mechanisms in case of failure of the pinion gear box shaft.
EFFECT: increased reliability of device.
7 cl, 3 dwg
FIELD: machine building.
SUBSTANCE: gear consists of pinion stationary connected with shaft (201) rotating in support by means of disintegrating element (40, 50) disconnecting pinion (20) from shaft (201) in case of excessive torque between pinion (20) and shaft (201). Between pinion (20) and shaft (201) there is installed guiding journal bearing in standby position directing pinion (20) into rotation around shaft (201) in case of disconnection of pinion (20) from shaft (201).
EFFECT: in gas-turbine engine drive assembly with disclosed gear facilitates rotation of auxiliary mechanisms in case of malfunction of shaft of drive assembly.
8 cl, 3 dwg
FIELD: engines and pumps.
SUBSTANCE: actuator includes motor, transmission and outlet shaft on which gear wheel is installed to bring annular gear into movement. Actuator includes mechanical overload protection device located between the last transmission element and root bearing of outlet shaft. Gear wheel is installed in end section of outlet shaft and engaged with annular gear.
EFFECT: creation of actuator with improved overload protection.
14 cl, 8 dwg
FIELD: machine building.
SUBSTANCE: limiter contains movable shaft, made with possibility of movement to both sides in axial direction, and rotation during work to rotate the drive shaft of the actuator for the valve driving. The brake disk is installed on the movable shaft. The first friction device is located at the first side from the brake disk. The second friction device is located at the second side. Contact between the brake disk and first or second friction devices stops the engine rotating the movable shaft. The limiter also contains casing and regulating system to regulate position of the first friction device and/or second friction device relatively the brake disk. The valve drive contains the limiter. The valve block contains the valve and valve drive.
EFFECT: reduced size of the device, and valve stress.
16 cl, 3 dwg