69results about How to "Suppresses vibration transmission" patented technology

In the electromagnetic switching device, it is possible to miniaturize and have low costs, have quiet operation noise, and also quickly extinguish the arc. The electromagnetic switching device has an electromagnetic actuator with a movable iron core, a pair of fixed terminals that respectively have a fixed contact point, a movable contact that has movable contact points on the right and left ends, a shaft, and an enclosing component that holds the movable contact points and the fixed contact points. The pair of movable contact points respectively contact with and detach from the pair of fixed contact points, and the pair of fixed contact points respectively conduct each other and are insulated again through the shaft by moving the movable iron core along the axis using the electric magnetic actuator. A quasi-hermetically sealed space, which is the extinguishing space, is formed by the enclosing component and a first yoke. A potting compound is charged, into the space between a body and the quasi hermitically sealed space.

An ultrasonic sensor according to the present invention is used, for example, for detecting an obstacle positioned in front of an automotive vehicle. The ultrasonic sensor includes an piezoelectric element connected to an acoustic matching member and a processing circuit, all contained in a casing. Ultrasonic waves reflected on an object are received by the acoustic matching member and converted into electrical signals in the piezoelectric element. The electrical signals are processed in the processing circuit to thereby detect a distance to the object and / or positions of the object. A surface of the acoustic matching member connected to the piezoelectric element is made larger than the piezoelectric element to form an overhang area on a conductive layer formed on the acoustic matching member. In this manner, electrical connection in the ultrasonic sensor is easily made, and detection sensitivity of the ultrasonic sensor is enhanced.

A front air-rectifying structure of an automotive vehicle is provided which can properly suppress the vibration transmissoin to a shutter unit, without damaging the air-guide performance for a shutter unit, thereby preventing any problem from happening to the move of flaps. The front air-rectifying structure of the automotive vehicle comprises an air guide member to guide air flowing in through a grille opening portion toward to the shutter unit. The shutter unit comprises plural flaps, a shutter frame member, and a second support portion to support the air guide member. The air guide member is formed integrally by a lower face portion positioned between an upper grille opening portion and the flaps, a first fixation portion fixed to a first support portion of a shroud member, and a second fixation portion fixed to a second support portion of the shutter unit. The lower face portion in a state of fixation to the second support portion is spaced apart upward from the shutter frame member.

To provide a power tool and a rotary impact tool capable of suppressing transmission of vibration to a circuit board and so on from a drive portion connecting to a motor as a vibration generation source. An impact wrench (1) includes a motor housing (20) which houses a motor (10) or a grip housing (38), a battery holding housing (43) connecting to the motor housing (20) or the grip housing (38) through an elastic body (54) and a control circuit board (52) housed in the battery holding housing (43) for controlling the motor (10).

A connector (F) includes an inner housing (11). Terminal fittings (72) are fixed to front end parts of wires (71) and are inserted into the inner housing (11) from behind. An outer housing (37) is held out of contact with the terminal fittings (72) and is mounted relatively displaceably with respect to the inner housing (11). Vibration damping rings (64) are fit externally on the wires (71) in a state out of contact with the inner housing (11), and are held resiliently in contact with the outer housing (37).

A connector (F) includes an inner housing (11). Terminal fittings (72) are fixed to front end parts of wires (71) and are inserted into the inner housing (11) from behind. An outer housing (37) is held out of contact with the terminal fittings (72) and is mounted relatively displaceably with respect to the inner housing (11). Vibration damping rings (64) are fit externally on the wires (71) in a state out of contact with the inner housing (11), and are held resiliently in contact with the outer housing (37).

Provided are a cover member fastening method and a fastening structure whereby the surface area in contact with an engine body is decreased, minimizing the transmission of vibrations to the cover member. Said fastening method and fastening structure also minimize deformation of the cover member while securely affixing abutting parts that need to be firmly fixed in place. The provided fastening structure uses a fastening member (7) to fasten a head cover (2) to a cylinder head (1) so as to cover the top surface of said cylinder head (1). Abutting parts (27) that abut against the top surface of the cylinder head (1) are formed on the inside surface of the head cover (2). The bottom surfaces of head-cover-side fastening boss parts (26) protrude farther than the bottom surface of a head-cover-side attachment flange (22). The surface area (A) of the bottom surfaces of the head-cover-side fastening boss parts (26) equals or approximates a minimum contact area (Amin) obtained by dividing the required axial fastening force (N) of the fastening member (7) by a stress tolerance (sa) determined by the material that the head cover (2) is made of.

The invention discloses a vibration reduction paving plate with multilayer metal spongy structure and high transfer loss. The vibration reduction paving plate with multilayer metal spongy structure and high transfer loss consists of three parts: an upper faceplate, a lower faceplate and a middle interlayer, wherein a plurality of rows of criss-cross reinforcing ribs are arranged at the inner surface of each of the upper faceplate and the lower faceplate; the faceplates form separated interval units through the transverse reinforcing ribs and the longitudinal reinforcing ribs. The middle interlayer unit comprises a plurality of layers of separated distribution middle layer units formed by foam metal layers and rubber layers; the corresponding interval units, separated by the reinforcing ribs, between the upper and lower layers of faceplates are filled with the middle interlayer units. The upper faceplate is not directly connected with the lower faceplate; the upper faceplate and the lower faceplate form a paving plate whole through being bonded by the middle interlayer units. The middle interlayer is separated into a plurality of interlayer units; gaps are formed between the interlayer units; the interlayer units are not connected. The designed paving plate has the characteristic of high structure damping; the structure vibration of the paving plate can be effectively reduced; the structure vibration transfer loss is increased; meanwhile, the structure weight of the paving plate can be reduced.