Vibration isolation apparatuses for crystal oscillators

    公开(公告)号:US12018733B2

    公开(公告)日:2024-06-25

    申请号:US17412654

    申请日:2021-08-26

    Applicant: VIASAT, Inc.

    Abstract: Methods, systems, and devices are described for isolating a crystal oscillator assembly from shock and/or vibration inputs. A system may include one or more vibration isolators coupled between the crystal oscillator assembly and the base structure, and each of the vibration isolators may include a spring material layer and a damping material layer. The spring material layer may provide a spring force between the crystal oscillator assembly and the base structure. The damping material layer may be adhered to at least one side of the spring material layer, and may provide a damping force between the crystal oscillator assembly and the base structure. Some vibration isolators may further include a constraint layer adhered to the damping material layer, such that the damping material layer is coupled between the constraint layer and the spring material layer.

    BRACING ARRANGEMENT WITH DAMPER
    4.
    发明公开

    公开(公告)号:US20240167533A1

    公开(公告)日:2024-05-23

    申请号:US18551488

    申请日:2022-03-25

    CPC classification number: F16F15/04 A47B96/14 B65G1/0464 F16F2230/0041

    Abstract: A bracing arrangement is for a framework structure of an automated storage and retrieval system. The framework structure includes a rail system arranged at an upper level of the framework structure. The rail system includes a first set of parallel rails arranged in a horizontal plane and extending in a first direction, and a second set of parallel rails arranged in the horizontal plane and extending in a second direction which is orthogonal to the first direction, which first and second sets of rails form a grid pattern in the horizontal plane including a plurality of adjacent grid cells. Each grid cell includes a grid opening defined by a pair of neighboring rails of the first set of rails and a pair of neighboring rails of the second set of rails. The framework structure provides a plurality of storage columns. Each column is arranged to store a respective stack of storage containers where the storage columns are located beneath the rail system and each storage column is located vertically below a grid opening. The rail system is arranged to guide a plurality of automated vehicles that operate on the rail system. The bracing arrangement includes an elongated, rigid bracing member, and a damping mechanism. The elongated, rigid bracing member is coupled at one end to the framework structure, at or near an upper level of the framework structure and at an opposite end to a grounding point. The damping mechanism is connected to an end of the bracing member. The damping mechanism is arranged to respond to forces from lateral movement in the upper level of the framework structure transferred to the damper mechanism via the elongated bracing member. The damping mechanism further includes a releasable locking mechanism which isolates the damping mechanism until a threshold force exerted on the locking mechanism via the bracing member is exceeded, such that after the threshold value is exceeded the releasable locking mechanism is tripped allowing the damper to dissipate kinetic energy from lateral movement of the upper level of the framework structure.

    System and method for passive damping of mechanical vibrations

    公开(公告)号:US11963451B2

    公开(公告)日:2024-04-16

    申请号:US16972213

    申请日:2019-06-06

    CPC classification number: H10N30/30 F16F15/007 F16F15/04 H02N2/181 H10N30/04

    Abstract: A system for passive damping of mechanical vibrations generated by a vibrating structure supported by a support, including a transducer interposed between the vibrating structure and the support to transform mechanical energy of vibrations into electrical energy. The transducer includes a flextensional structure having a first axis perpendicular to a second axis, a stack of piezoelectric elements adapted to produce electrical energy when stressed, the stack stressed in compression by the flextensional structure along the first axis so that deformation of the structure modifies the compressive stress applied to the stack, two peripheral fasteners are secured to the flextensional structure, each fastener disposed along the second axis, a first fastener for securing the flextensional structure to the vibrating structure, a second fastener for securing the flextensional structure to the support, at least one fastener integrates an elastic suspension, a shunt connected to the piezoelectric stack to dissipate electrical energy.

    VIBRATION ISOLATION STRUCTURE
    6.
    发明公开

    公开(公告)号:US20240110611A1

    公开(公告)日:2024-04-04

    申请号:US18477007

    申请日:2023-09-28

    Inventor: Masahiro Satoh

    CPC classification number: F16F15/04

    Abstract: A vibration isolation structure includes a mounting structure part secured to a pump, an elastic vibration isolation member attached to the mounting structure part, and an upper securing member secured to the mounting structure part to hold the elastic vibration isolation member. The upper securing member has first and second body portions opposed to each other across a tabular mounting portion of the mounting structure part in a thickness direction thereof. A connecting portion connects together the first and second body portions, and a locking projection extends from the first body portion. The upper securing member is secured to the mounting structure part by engagement of the locking projection with a locking surface of the mounting structure part. The upper securing member holds the elastic vibration isolation member to the tabular mounting portion by engaging the elastic vibration isolation member at a side closer to a side surface.

    SHOCK ABSORPTION PEDAL WITH ADJUSTABLE RESISTANCE

    公开(公告)号:US20240002201A1

    公开(公告)日:2024-01-04

    申请号:US18470033

    申请日:2023-09-19

    CPC classification number: B66F9/0759 F16F15/04

    Abstract: A shock absorption pedal with adjustable resistance includes: a fixed guide rail, fixedly connected to a vehicle body; a sliding frame, arranged in a groove of the fixed guide rail, and movable vertically along the fixed guide rail; and a support plate, fixedly connected to the sliding frame. A displacement regulating mechanism is arranged on the fixed guide rail. One end of the displacement regulating mechanism is arranged outside the groove of the fixed guide rail, and another end of the displacement regulating mechanism is connected to one end of a shock absorption spring. Another end of the shock absorption spring is fixedly connected to the sliding frame. A position of the sliding frame is regulable by the displacement regulating mechanism, to adjust a length of the shock absorption spring.

    Superelastic Multi Axis Flexure
    10.
    发明公开

    公开(公告)号:US20230258222A1

    公开(公告)日:2023-08-17

    申请号:US17672637

    申请日:2022-02-15

    CPC classification number: F16B1/0014 F16F15/04

    Abstract: A multi-axis payload isolation device for isolating a payload from outside motions. The multi-axis payload isolation device includes a payload mount base, a housing, and a flexure. The payload mount base is configured to support a payload. The housing includes an interior cavity for receiving and supporting the payload mount base. The flexure includes a plurality of radial supports and a common hub. The plurality of radial supports attach the payload mount base to the housing and are made of a superelastic shape-memory alloy. The common hub is configured to connect each of the plurality of radial supports to the payload mount base.

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