The present invention discloses electronic equipment with a vibration function, including a carrier and a vibration module configured for providing a vibration sense; the vibration module includes a housing having a receiving space and provided with an opening in at least one end; a vibration unit received in the receiving space and directly providing a vibration sense to a user; and an elastic member; the elastic member elastically connects the vibration unit to the housing, so as to elastically suspend the vibration unit in the receiving space. According to the electronic equipment of the present invention, in both cases where a surface of the carrier is a flexible material and the carrier is relatively heavy, local vibration can be provided through the independent vibration unit, so as to directly feedback vibration actually generated by the vibration unit to the user, thus improving the experience of the user.

A vibratory compactor that generates vibrations by rotation of eccentric masses is provided, which includes an inner eccentric rod positioned inside a roller drum of the vibratory compactor and provided with a rack formed on one side of the inner eccentric rod, a pinion engaged with the rack, a variable eccentric weight engaged with the pinion so that a distance between the variable eccentric weight and a rotation axis of the inner eccentric rod is changed as the pinion is rotated, and an outer eccentric tube including a hole formed thereon to guide movement of the rack back and forth and a support fixture formed thereon to fix a shaft of the pinion so that the pinion is rotated in engagement with the rack, wherein when the inner eccentric rod moves back and forth, the pinion that is engaged with the rack is rotated as much as the movement of the rack, and as a position of the variable eccentric weight is changed, an amplitude of vibration of the roller drum is changed.

An assembly for vibrating a compacting drum of a compacting machine includes a shaft rotatably mountable to a compacting drum of the compacting machine. The center of mass of the shaft is offset from the geometrical rotation axis of the shaft. An outer eccentric member is arranged outside of the shaft, wherein the center of mass of the outer eccentric member is offset from the geometrical rotation axis of the shaft. The outer eccentric member is displaceably mounted relative to the shaft for adjustment of the eccentricity of the assembly. An extension of the outer eccentric member in a direction parallel with the geometrical rotation axis of the shaft is at least two times an average extension of the outer eccentric member in a radial direction perpendicular to the geometrical rotation axis of shaft such that a mass of the outer eccentric member forms a distributed load along the geometrical rotation axis of the shaft.

The present invention relates to a device for generating vibrations for a ground compaction machine, in particular a self-propelled ground compaction roller, comprising a first imbalance mass and a second imbalance mass, each of which is rotatably mounted, a first hydraulic motor configured to set the first imbalance mass into rotation, a planetary gear connected to the first hydraulic motor and via which the second imbalance mass can be driven, a second hydraulic motor which is also connected to the planetary gear and is configured to change the transmission ratio from the first hydraulic motor to the second imbalance mass via the planetary gear, wherein a third hydraulic motor is provided which is also connected to the planetary gear and is also configured to change the transmission ratio from the first hydraulic motor to the second imbalance mass via the planetary gear. Moreover, the present invention relates to a ground compaction machine and a method for operating the device and the ground compaction machine, respectively.

An adjustable mass eccentric for a multi-amplitude vibratory mechanism can comprise a body and an internal cavity defined by the body such that the body surrounds the internal cavity. The internal cavity can include a first section, a second section, and a third section between the first section and the second section. The third section can define a volume and/or an area less than respective volumes and/or areas of the first section and the second section of the internal cavity. Filler material may be provided in the internal cavity and can migrate to and from the first, second, and third sections based on rotational movement of the body and internal cavity.

The present disclosure is directed to techniques for synchronizing a rotational eccentric mass of a gravitational transducer used for a magnetic resonance elastography acquisition with a corresponding magnetic resonance elastography scan carried out by a magnetic resonance imaging system, wherein the rotation of the eccentric mass is driven by a shaft. The method includes starting the rotation of the eccentric mass at a set vibration frequency and the magnetic resonance elastography scan at a set acquisition frequency; determining the rotational position of the shaft; defining the rotational position as first reference position; calculating further reference positions. At the start time of each subsequent acquisition period, determining the current rotational position of the shaft; comparing the determined current rotational position with the theoretically expected reference position and decreasing or increasing the rotational speed of the rotational eccentric mass based on the comparison.

An eccentric assembly for a compaction machine may include an outer eccentric mass and first and second inner eccentric masses. A length of the outer eccentric mass is in a direction of an axis of rotation of the outer eccentric mass. The first inner eccentric mass is rotatably connected to the outer eccentric mass by a first joint, and the second inner eccentric mass is rotatably connected to the outer eccentric mass by a second joint. Moreover, the first and second inner eccentric masses are separate, and the first and second joints are separate. Related compaction machines are also discussed.

An unbalance arrangement for a compactor roller of a soil compacter includes a first unbalance mass unit rotatable around an unbalance axis of rotation having a first center of mass eccentric with respect to the unbalance axis of rotation, a second unbalance mass unit rotatable around the unbalance axis of rotation having a second center of mass eccentric with respect to the unbalance axis of rotation, an unbalance drive for jointly driving the first unbalance mass unit and the second unbalance mass unit to rotate around the unbalance axis of rotation, and a phase position adjustment unit for adjusting a phase position of the first center of mass with respect to the second center of mass around the unbalance axis of rotation. The phase position adjustment unit includes a spur gear arrangement in the torque transmission path between the unbalance drive and the first unbalance mass unit or the second unbalance mass unit.

An eccentric mass vibrating system comprising: a first motor having a first shaft; a first eccentric mass connected to said first shaft; a second motor having a second shaft; a second eccentric mass connected to said second shaft; said first motor and said second motor are adapted to be associated with an object to be vibrated; said first motor and said second motor being electrically adjustable so as to arrange said first eccentric mass and said second eccentric mass at a predefined angle therebetween; said first motor and said second motor being adapted to be positioned on an object to be vibrated; characterised in that it comprises: at least one sensor associated with said object to be vibrated, and a control computer of said system adapted to modify said predefined angle if the value measured by said sensor exceeds a predefined value.

A vibration device belongs to the field of vibration machinery technologies, and includes an eccentric vibrator, a vibration motor, and a servo linear motion system. The eccentric vibrator includes at least a first eccentric body, a second eccentric body, and a connecting shaft. At least one of the first eccentric body or the second eccentric body is connected to the connecting shaft by a spiral groove and a boss structure matching the spiral groove. The servo linear motion system is connected to the connecting shaft. The servo linear motion system pushes the connecting shaft to move linearly, and drives the second eccentric body to rotate in a circumferential direction, and the first eccentric body remains stationary, so that adjustment of relative positions of the first eccentric body and the second eccentric body in the circumferential direction is implemented, and the purpose of controlling the magnitude of an exciting force in real time in a working process of equipment is implemented.