摘要:
A power screwdriver overload prevention means (100), which is arranged between an input drive part (110) and an output drive part (102, 121) and which interrupts the transmission of torque between the input drive part (110) and the output drive part (102, 121) when a threshold torque is exceeded, is characterized in that the input drive part (110) has at least one ring of balls (130) that is arranged in a rotationally fixed manner in the input drive part, in that the output drive part (102, 121) has at least one ring of balls (140; 141, 142) that is arranged in a rotationally fixed manner in the output drive part (102, 121), and in that the ring of balls (130) that is arranged in the input drive part (110) is spring-preloaded via the ring of balls (140; 141, 142) arranged in the output drive part (102, 121) such that the balls (130) of the input drive part (110) are located in each case between two balls (140; 141, 142) of the output drive part (102, 121) and thus transmit a torque, and such that, when the threshold torque is exceeded, the balls (130) of the input drive part (110) roll over the balls (140; 141, 142) of the output drive part (102, 121) and thus interrupt the transmission of torque.
摘要:
A rotational atherectomy system may include a drive shaft, a motor, and a clutch with a threshold torque where the clutch may include a motor plate rotationally connected to the motor, a drive shaft plate rotationally connected to the drive shaft, and a biasing clutch configured to rotationally engage the motor plate and the drive shaft plate, wherein torques less than the threshold torque are transmitted completely between the motor plate and the drive shaft plate, which remain rotationally coupled by static friction, and wherein torques greater than the threshold torque cause the motor plate and the drive shaft plate to rotate relative to one another and cause a residual torque to be transmitted between the motor and the drive shaft, the residual torque being less than the threshold torque and being determined by a kinetic coefficient of friction.
摘要:
A positive displacement pump (8) comprises a cylindrical input shaft (13) comprising a first area (A1) with a first diameter (D1), a second area (A2) with a second diameter (D2), and a third area (A3) with a third diameter (D3), where the second diameter is greater than the first diameter and the third diameter. A stator (19) is press fit to a portion of the third area. A cylindrical bushing (15) is press fit around the second area. When the input shaft (13) rotates, the torsional vibration damping bushing (15) resists the rotation. The pump also comprises a clutch assembly (21). A clutch armature (29) of the assembly comprises a cylindrical, hollow passageway (290) and radially extending arms (39). Each arm comprises an opening (293), at least one slot (295) passing through the arm, and at least one void (297) abutting the slot, the void passing through the arm. When the clutch assembly engages, the armature damps vibrations.
摘要:
A torque limiter mounted on a hybrid vehicle includes an output plate, an input plate including a first region facing a first main surface of the output plate and a second region facing a second main surface of the output plate, a friction member provided on the first main surface of the output plate and disposed between the first main surface and the first region, and a biasing member being in contact with the second main surface of the input plate, for biasing the output plate toward the first region.
摘要:
A pedaling assistance device for a light vehicle, in particular a bicycle, equipped with pedals and a ratio-changing transmission, this device comprising a heat engine equipped with a reducing gear mechanically coupled with an element receiving muscular pedaling power from a user of the light vehicle, the mechanical coupling being effected upstream of said ratio-changing transmission so that the heat engine benefits from said changes of ratio, wherein the assistance device comprises a torque limiter, placed on the kinematics of the reducing gear of the heat engine between said heat engine and the mechanical coupling.
摘要:
Providing a vehicular power transmitting system which includes a torque limiter device and which is configured to reduce deterioration of durability of a rotary member disposed between an engine and the torque limiter device.An inertia moment I1 of a first rotary portion 104 of a torque limiter device 24 about its axis (first axis RC1) is smaller than an inertia moment I2 of a second rotary portion 106 about its axis (first axis RC1), so that an inertia moment of rotary members between an input shaft 18 and the first rotary portion 104 can be reduced as compared with that where the above-indicated inertia moment I1 is larger than the inertia moment 12. Accordingly, the torque which transiently acts on a rotary member disposed between the engine 14 and the torque limiter device 24, for instance, acts on the input shaft 18, during an operation of the torque limiter device 24, that is, during a slipping motion of the first rotary portion 104 and the second rotary portion 106 can be reduced, so that the deterioration of durability of the input shaft 18 can be reduced.
摘要:
A pedaling assistance device for a light vehicle, in particular a bicycle, equipped with pedals and a ratio-changing transmission, this device comprising a heat engine (1; 101; 201) equipped with a reducing gear mechanically coupled with an element receiving muscular pedaling power from a user of the light vehicle, the mechanical coupling being effected upstream of said ratio-changing transmission so that the heat engine benefits from said changes of ratio, wherein the assistance device comprises a torque limiter (6; 106; 206), placed on the kinematics of the reducing gear of the heat engine between said heat engine and the mechanical coupling.
摘要:
A chainsaw (100) has a chainsaw body (101), a cutting chain (103) driven by a motor, and a guide bar mounting stud (111) extending from the chainsaw body (101). The chainsaw (100) also has an adjustably connected guide bar (102) having a track for supporting the cutting chain (103) around a periphery of the guide bar (102) and an adjustment pin (114) extending from a side face thereof. The guide bar mounting stud (111) is configured to extend through an elongated slot (112) in the guide bar (102). The chainsaw (100) also has a cam (116) received on the guide bar mounting stud (111) and having an eccentric groove facing the guide bar (102). The adjustment pin (114) is received in the eccentric groove such that rotation of the cam (116) causes the guide bar (102) to move with respect to the chainsaw body (101), thereby tensioning the cutting chain (103). The chainsaw (100) also has a clutch (118) connected to the cam (116) for allowing no more than a predetermined load to be applied to the guide bar (102) for tensioning the cutting chain (103).
摘要:
A manufacturing method that can stabilize an operation torque of a torque limiter device in a manufacturing stage is provided. The method of manufacturing the torque limiter device 1 includes an assembling step S1 of attaching a clutch disk 13 and a damper mechanism 16 to a spline hub 15, and attaching a friction facing 21 to the clutch disk 13; an assembling step S2 of attaching a transmission torque limiting portion 6 to the friction facing 21; and a grinding step S4 of supplying a torque to at least one of the transmission torque limiting portion 6 and the spline hub 15 to rotate them relatively to each other.
摘要:
A gear mechanism with torque limiter includes a felt member 14 that is held between a first gear 13 and a second gear 15 coaxially arranged first gear 13 and second gear 15, for transmitting drive power between the gears, such that coupling of drive power between the gears is restricted by slippage of the felt member 14 when an excessive load is applied thereto, wherein multiple protrusions 19a are provided concentrically on the surface of one of the gears 13 (15) in contact with the felt member 14, and concentric grooves 20a corresponding to the protrusions are provided on the surface of the other gear (13) 15.