摘要:
The present invention provides a bladder-type jig suitably used for manufacturing a stiffened panel structure using a hat stringer. The present invention has an advantage that deformation of prepreg can be suppressed effectively, and durability of the jig can be improved so that repeated use of the jig is achieved. To be specific, a body (11) of the bladder includes a pipe-shaped portion (14) and a coating film (15) covering the outer peripheral surface of the pipe-shaped portion (14). The pipe-shaped portion (14) is a main body portion of the body (11), and is made of a silicone rubber composition material such that its transverse cross-section has a trapezoidal pipe shape. Both side edge portions of an exposed wall portion (11b) corresponding to a lower base of the transverse cross-section are thickened edge portions (11d) which are greater in thickness than another wall portions. The thickened edge portions (11d) support the exposed wall portion (11b) from inward of the body (11), and can suppress the exposed wall portion (11b) from getting deformed inwardly.
摘要:
A liquid-filled vibration isolator A has a first orifice channel P1 providing communication between a pressure receiving chamber f1 and a balancing chamber f2. One of the pressure receiving chamber f1 and the balancing chamber f2 is communicated via a second orifice channel P2 with an intermediate liquid chamber f3. The second orifice channel P2 has a shorter distance or a larger cross-sectional area than the first orifice channel P1. An elastic film member, such as a membrane 42, separates the intermediate liquid chamber f3 and the other of the pressure receiving chamber f1 and the balancing chamber f2 from each other. A communicating hole 42a of a predetermined size is formed in the elastic film member. An imaginary orifice channel combined from the two orifice channels P1 and P2 provides a high damping effect on input vibration of relatively low frequency. As the vibration frequency increases, a gradual transition is made to the damping characteristic of the second orifice channel P2 only.
摘要:
In an abnormal noise inspection method for a anti-vibration device for vehicle use, it is determined whether, during travel of a vehicle in which a supported member is supported to the vehicle body by an anti-vibration device, abnormal noise occurs or not in the passenger compartment owing to the anti-vibration device. The method includes: an input step of mounting to a shaker the anti-vibration device before assembled into the vehicle and then inputting vibrations in a predetermined pattern to a supported member-side mounting part of the anti-vibration device; a measurement step of measuring, during the inputting of vibrations, a transmission force output from a vehicle body-side mounting part of the anti-vibration device; an analysis step of frequency analyzing time-series data on the measured transmission force to obtain the power spectrum of the transmission force; and a determination step of estimating, based on the power spectrum of the transmission force and according to a predetermined evaluation criterion, whether a vehicle produces abnormal noise in the passenger compartment when it runs with the anti-vibration device mounted thereon.
摘要:
A fluid-contained engine mounting device (100), containing a fluid in a fluid container (2) closed up air-tightly by an elastic top wall and an elastic bottom diaphragm which is divided by a partition wall into a first fluid chamber (10A) closed by the elastic top wall (4) and a second fluid chamber (10B) closed by the elastic bottom diaphragm (9) and confining a predetermined quantity of a gas (G) in the first fluid chamber (10A), absorbs vibrations of the engine transmitted thereto by means of expansion and contraction of the elastic top wall (4) and elastic bottom diaphragm (9).
摘要:
Rubber compounds for rubber products, that are provided with excellent physical properties and moldability through the compounding of raw rubber with partially dissolved rubber that can be obtained from vulcanized scrap rubber under ordinary temperature conditions and without the use of desulfurization equipment, methods of manufacturing such rubber compounds and reclaiming agents used in such methods. In these methods, a partially dissolved product of vulcanized scrap rubber is obtained by causing a reclaiming agent, consisting of 50-200 parts by weight of petroleum process oil and 1-30 parts by weight of peptizer to act on 100 parts by weight of powderized, vulcanized scrap rubber mainly under ordinary temperature conditions or by treating 100 parts by weight of powderized, vulcanized scrap rubber with 80-500 parts by weight of a first reclaiming agent of organic solvent and then causing 30-200 parts by weight of a second reclaiming agent of petroleum process oil to act on said rubber mainly under ordinary temperature conditions.
摘要:
In a liquid-filled anti-vibration mounting device suitable such as for an engine mount, an accommodation room containing a rubber movable plate (42) is formed inside a partition member partitioning a liquid chamber into a pressure receiving chamber and a balancing chamber. The partition member includes a pair of division walls, one adjoining the pressure receiving chamber and the other adjoining the balancing chamber. Each division wall is formed with a plurality of communication holes (40e,41b). The communication holes are arranged to undulate at least a portion of the movable plate (42) towards the peripheral edge thereof at specified circumferential intervals or greater by the action of the liquid pressure through the communication holes (40e,41b). The movable plate (42) thus deformed, particularly its portion towards the peripheral edge, has a small area to come into contact with the division walls at a time, which effectively disperses and lessens a shock due to contact.
摘要:
A vibration isolator mount 5 includes: an inner cylinder body 30 ; an outer cylinder body 31 arranged around the inner cylinder body 31 ; a flange portion 32 provided at a front end portion of the outer cylinder body 31 in the axial direction so as to extend raidally outward; a rubber elastic body 33 interposed between the cylinder bodies 30, 31 to connect therebetween; and a stopper rubber elastic body 34 provided at a face of the flange portion 32 facing outward with respect to the cylinder axial direction. Holes 34a open at a stopper face 34b and extending inward along the cylinder axial direction are formed in the stopper rubber elastic body 34 . A rigid body 35 is provided at a part inside than the holes 34a in the stopper rubber elastic body 34 with respect to the cylinder axial direction.