44results about How to "Prevent de-grooving" patented technology

The invention discloses a microswitch with a forced separating mechanism, and the microswitch comprises a housing. The interior of the housing is provided with a normally-closed connector assembly anda common connector assembly and also comprises an elastic assembly which is electrically connected with the common connector assembly and can be electrically connected with the normally-closed connector assembly. The elastic assembly is linked with a triggering assembly, and can swing around a supporting part of the common connector assembly under the action of the triggering assembly. The interior of the housing is also provided with the multi-stage transmission forced separating mechanism, and the forced separating mechanism can make contact with the elastic assembly under the action of thetriggering assembly, and can separate the elastic assembly with the normally-closed connector assembly in a forced manner. The microswitch is provided with the forced separating mechanism. When the microswitch has an abnormality and the contact of a static contact of the normally-closed connector assembly with a moving contact on the common connector assembly is not normally cut off, the forced separating part will separate the moving and static contacts in a forced manner, so as to guarantee the electrical safety.

The invention discloses a pulley device for a crane and the crane, and belongs to the field of mechanical lifting. The pulley device comprises a pulley support, a fixed pulley and a rope blocking assembly, the pulley support comprises two side plates which are oppositely arranged in parallel, the fixed pulley is arranged between the two side plates, the axial direction of the fixed pulley is perpendicular to the two side plates, the rope blocking assembly comprises two arc-shaped rope blocking plates and at least one first rope blocking component, the two arc-shaped rope blocking plates are arranged on the two side plates in a one-to-one correspondence mode, the two arc-shaped rope blocking plates are located between the two side plates, and when a steel wire rope falls off from a rope groove of the fixed pulley, the arc-shaped rope blocking plates can play a blocking role so that the steel wire rope can be prevented from falling on a pulley shaft; and the first rope blocking components comprise first rope blocking rods, the two ends of each first rope blocking rod are correspondingly connected to the two arc-shaped rope blocking plates, and the minimum distance between the first rope blocking components and the fixed pulley is smaller than the diameter of the steel wire rope so that the steel wire rope can be blocked by the first rope blocking components and can be prevented from falling off from the rope groove.

The invention is suitable for the technical field of transmissions, and provides an AMT gear selecting and shifting actuator. The MT gear selecting and shifting actuator comprises a gear selecting and shifting shaft, a gear shifting rocker arm, a gear shifting driving assembly and a gear selecting driving assembly, wherein the gear shifting driving assembly drives the gear selecting and shifting shaft to rotate in the axial direction through the gear shifting rocker arm; a sliding shifting block is installed on the gear selecting and shifting shaft in the axial direction in a sliding mode; the gear selecting driving assembly comprises a gear selecting screw rod; the gear selecting screw rod is in threaded connection with a gear selecting screw rod nut, and the gear selecting screw rod nut is clamped with the sliding shifting block; one end of the gear selecting screw rod is connected with a gear selecting motor through a gear selecting coupler; and the gear selecting screw rod is in threaded connection with a sealing plug block, the sealing plug block is located in a concave hole of a shell, the elastic check ring is further installed between the sealing plug block and the gear selecting coupler, external threads are arranged on the peripheral face of the sealing plug block, and internal threads matched with the external threads are arranged in the concave hole. The AMT gear selecting and shifting actuator is high in universality, and transmission of the whole mechanism is simplified; and the workload in the assembly process is reduced, and the assembly cost is reduced.

The invention discloses a mowing table transmission device of a pedestrian-controlled lawn mower. The mowing table transmission device comprises a flat belt, an engine belt pulley, two cutter belt pulleys and a tensioning wheel mechanism, wherein a mechanism for preventing the flat belt from falling out of grooves is arranged on the outer side of the flat belt between the engine belt pulley and the other cutter belt pulley, and belt blocking hoods are respectively arranged on the outer sides of the two cutter belt pulleys; the upper and lower sides of the flat belt are located between the upper and lower horizontal rods of a belt support rack; the groove width of the engine belt pulley is larger than the width of the flat belt. The mowing table transmission device has the advantages that the device is simple in structure, low in cost and high in use efficiency; when the terrain clearance of a mowing table is adjusted, the flat belt can move vertically to adapt to the height change of the mowing table, and the service life of the flat belt is prolonged; the mechanism for preventing the flat belt from falling out of the grooves uses the belt support rack to prevent the flat belt from falling out of the grooves and can drive the flat belt to move up and down so as to adjust the terrain clearance of the mowing table.

The invention discloses reliably connected shockproof dual wheel type car roof diversion sheaves. The reliably connected shockproof dual wheel type car roof diversion sheaves comprise diversion sheaves and a diversion sheave connection portion, wherein the diversion sheaves are connected above an upper beam through the diversion sheave connection portion. The reliable connected shockproof dual wheel type car roof diversion sheaves are characterized in that the two diversion sheaves are connected with two connection channel steel in a rotating shaft mode; the diversion sheave connection portion comprises a beam connection portion; the two connection channel steel are fixedly connected with the beam connection portion through a fixed device; the beam connection portion comprises a connection shaft and two connection blocking plates; the beam connection portion is connected with the upper beam through a connection shaft in a rotating shaft mode; the two connection blocking plates are arranged on the upper side and the lower side of the upper beam in a blocking mode; and the upper beam and the connection blocking plates are provided with shock pads. The reliably connected shockproof dual wheel type car roof diversion sheaves have the advantages of being good in reliability, improving the safety performance, effectively avoiding transmission of shocks and noises, enabling the load to be in uniform multipoint distribution, being stable in structure, preventing deformation and effectively preventing a hoisting rope from jumping out or falling off.

The invention discloses a lifting machine and a method of leveling a top plate of the lifting machine, and belongs to the technical field of lifting machines. The lifting machine comprises crossed lifting devices, wherein the crossed lifting devices are used for driving a top plate body to ascend and descend. Each crossed lifting device comprises two crossed rods, wherein the two crossed rods areparallel to each other. Each crossed rod comprises a driving rod and a driven rod. Hydraulic driving devices are installed on a base plate, and the ends of piston rods of the hydraulic driving devicesare hinged to wheel rods. A laser generator is installed on the lower surface of the top plate body, a screen light spot catcher is arranged on the surface of the base plate and connected with a controller, and the controller is used for controlling hydraulic oil of the two hydraulic driving devices on the base plate to be fed. According to the lifting machine and the method of leveling the top plate of the lifting machine, single oil supply is conducted on the hydraulic driving devices through the controller, then the levelness of the top plate body on the crossed lifting devices is adjustedand corrected, and objects placed on the top plate body are prevented from sliding off.

The invention discloses a microswitch with a forced separating mechanism, and the microswitch comprises a housing. The interior of the housing is provided with a normally-closed connector assembly anda common connector assembly and also comprises an elastic assembly which is electrically connected with the common connector assembly and can be electrically connected with the normally-closed connector assembly. The elastic assembly is linked with a triggering assembly, and can swing around a supporting part of the common connector assembly under the action of the triggering assembly. The interior of the housing is also provided with the multi-stage transmission forced separating mechanism, and the forced separating mechanism can make contact with the elastic assembly under the action of thetriggering assembly, and can separate the elastic assembly with the normally-closed connector assembly in a forced manner. The microswitch is provided with the forced separating mechanism. When the microswitch has an abnormality and the contact of a static contact of the normally-closed connector assembly with a moving contact on the common connector assembly is not normally cut off, the forced separating part will separate the moving and static contacts in a forced manner, so as to guarantee the electrical safety.

The invention discloses a universal micro switch with a forced separation function. The universal micro switch comprises a normally-closed connector, a movable contact spring, an elastic part and a press button, and also comprises a forced separation part, wherein one end of the forced separation part is mounted on a shell through a rotating shaft, and the other end of the forced separation part abuts against the movable contact spring; and the normally-closed connector and the movable contact spring are separated through linkage of the press button in a forced manner. The press button is usedfor triggering the elastic part and the movable contact spring, and after a switching position of the switch is reached, the forced separation part is triggered in a linkage manner, so that the separation of the normally-closed connector and the movable contact spring is guaranteed. Compared with the prior art, the switch is additionally provided with the forced separation part so as to realize the forced separation function, safer and more reliable application of the switch in the industry is guaranteed, and the universal micro switch has wide application prospects.