Showing papers by "Nagai Makoto published in 1995"

Vibration-proof structure in air conditioner

Abstract: PURPOSE:To enable a superior anti-vibration characteristic to be attained by a method wherein a flange-like foot of a motor for use in driving an air blowing or air suction fan is supported by a housing through a substantial cylindrical rubber. CONSTITUTION:A foot 4 extending from a motor 7 for use in driving a fan for feeding air or sucking air is held with rubbers 31, 32. The motor 7 is fixed to a housing 1 through vibration-proof rubbers 31, 32 with bolts 35, nuts 34 and spacers 35. A feature of this vibration-proof structure 30 consists in a shape of the rubber 32, wherein the rubber 32 is formed into a cup-shaped form to keep softness of the vibration-proof rubber 32 and then vibration transmitted from the motor 7 to the housing 1 is insulated. That is, a vibration-proof effect can be attained at a natural oscillation as well all frequencies of the housing 1 under a combination of the housing 1 and the vibration-proof structure 30. With such an arrangement as above, it is possible to get a superior vibration- proof characteristic at the indoor device.

Vibration isolating structure for air-conditioning machine

Abstract: PURPOSE:To reduce noise of an indoor machine by reducint vibration, transmitted from a fan driving motor to a fan and a casing. CONSTITUTION:A fan 6 is pinched by an upper vibration isolating element 15 and a lower vibration isolating element 19 and is fixed to the shaft 11 of a motor 7 by a screw 20 and a spacer 21 without being contacted with the shaft 11. The upper vibration isolating element 15 is constituted of plates 12, 13 and a rubber 14 pinched between these plates while the lower vibration isolating element 19 is constituted of plates 16, 12 and a rubber 18 pinched between these plates 16, 17 whereby the fan is supported in a condition that the fan is sandwiched by the rubbers 14, 18 and the fan is structured so that a power from the motor is transmitted to the fan through rubbers. According to this method, vibration, transmitted from the motor to the fan, is reduced by the upper vibration isolating element 15 and the lower vibration isolating element 19 and, as a result, noise due to electromagnetic vibration can be reduced remarkably.

Fan for air conditioner

Abstract: PURPOSE:To prevent the propagation of vibration from a motor to a fan in a simple manner by holding an impeller attached to a driving shaft projecting out of the motor with two rubber preventers consisting of two plates holding rubber between, and forming a clearance in an interval between the impeller and the driving shaft. CONSTITUTION:In this air conditioner fan, an impeller is attached to a driving shaft 2a projecting out of a motor. In this case, this impeller is held by two rubber preventers consisting of two plates holding rubber between, and a clearance is formed in an interval between the impeller and the driving shaft. In brief, a driving shaft diameter A is set to be smaller than a driving shaft inserting hole diameter B and thereby the driving shaft 2a and the fan are always maintained in a noncontact way, whereby vibration in the motor is prevented from being propagated to the fan, forestalling any noise due to resonance. On the other hand, torque out of the driving shaft 2a is transmitted via plural rubber vibration insulators. Each rubber vibration insulator is made up of unitizing each of flat washers 3a, 3g, pinned washers 3c, 3e and rubber pieces 3b, 3f as one boy and these elements are attached to the motor side and the shaft end side respectively.