A vibration excitation device comprises an input shaft, eccentric blocks and eccentric torque output shafts. The input shaft can drive the eccentric torque output shafts to rotate, and the eccentric blocks sleeve the outer sides of the eccentric torque output shafts. The eccentric blocks on the eccentric torque output shafts synchronously rotate along with rotation of the eccentric torque output shafts and generate a centrifugal force. The centrifugal forces of the eccentric blocks on one pair of exactly opposite eccentric torque output shafts are equal in magnitude and opposite in direction, but each pair of centrifugal forces forms a force couple. The magnitude and direction of the torque of each force couple periodically change based on the sine function rule over time, and under the action of the torques of the two pairs of force couples, the vibration excitation device generates an arc vibration in a horizontal direction.

A vibration excitation device comprises an input shaft, eccentric blocks and eccentric torque output shafts. The input shaft can drive the eccentric torque output shafts to rotate, and the eccentric blocks sleeve the outer sides of the eccentric torque output shafts. The eccentric blocks on the eccentric torque output shafts synchronously rotate along with rotation of the eccentric torque output shafts and generate a centrifugal force. The centrifugal forces of the eccentric blocks on one pair of exactly opposite eccentric torque output shafts are equal in magnitude and opposite in direction, but each pair of centrifugal forces forms a force couple. The magnitude and direction of the torque of each force couple periodically change based on the sine function rule over time, and under the action of the torques of the two pairs of force couples, the vibration excitation device generates an arc vibration in a horizontal direction.

A vibration generator has a first rotationally drivable imbalance shaft, on which a first imbalance is arranged, at least one second rotationally drivable imbalance shaft, on which a second imbalance is arranged, a joint drive for rotationally driving the two imbalance shafts and a transmission arrangement which is arranged between the drive and the imbalance shafts for transmitting a torque of the drive to the imbalance shafts. The transmission arrangement distributes an input torque of the drive to a first output element for the first imbalance and a second output element for the second imbalance. For the torque transmission a first deflection element is arranged between the transmission arrangement and the first imbalance shaft and for the torque transmission a second deflection shaft is arranged between the transmission arrangement and the second imbalance shaft.

A vibration generator has a first rotationally drivable imbalance shaft, on which a first imbalance is arranged, at least one second rotationally drivable imbalance shaft, on which a second imbalance is arranged, a joint drive for rotationally driving the two imbalance shafts and a transmission arrangement which is arranged between the drive and the imbalance shafts for transmitting a torque of the drive to the imbalance shafts. The transmission arrangement distributes an input torque of the drive to a first output element for the first imbalance and a second output element for the second imbalance. For the torque transmission a first deflection element is arranged between the transmission arrangement and the first imbalance shaft and for the torque transmission a second deflection shaft is arranged between the transmission arrangement and the second imbalance shaft.

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.

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.

A rotary member combination device and a connecting shaft thereof are provided. The rotary member combination device includes at least a first rotary member and a second rotary member, and further includes a connecting shaft between the first rotary member and the second rotary member. At least one of the first rotary member or the second rotary member is connected to the connecting shaft by a spiral groove and a boss structure matching the spiral groove. For the connecting shaft used in the rotary member combination device, the connecting shaft is provided with a first boss or a third spiral groove matching the first rotary member of the rotary member combination device. Compared with the prior art, the connecting shaft provided in the present invention may connect two or more rotary members to implement a relative positional relationship of the two or more rotary members in a circumferential direction, an adjustment process does not require any state condition, and relative positions of the rotary members in the circumferential direction may be controlled in a stationary state or at any rotational speed. The control accuracy is high, the control mode is flexible, and a mode such as manual adjustment, electrical automatic control, hydraulic adjustment, or pneumatic adjustment may be implemented.

A vibration generating mechanism for a screen box includes a drive shaft arranged to be rotatably driven by a drive motor, at least one first eccentric out-of-balance weight fixed with respect to the drive shaft for rotation therewith and at least one second eccentric out-of-balance weight coupled to the drive shaft via gearing. The first and second out-of-balance weights rotate in opposite directions when driven by the drive shaft.

A vibration generating mechanism for a screen box includes a drive shaft arranged to be rotatably driven by a drive motor, at least one first eccentric out-of-balance weight fixed with respect to the drive shaft for rotation therewith and at least one second eccentric out-of-balance weight coupled to the drive shaft via gearing. The first and second out-of-balance weights rotate in opposite directions when driven by the drive shaft.

A rocking device provided with a fastening means (9) for mounting to for example a baby buggy to create an automatic rocking movement of the baby buggy. It comprises a rotating, asymmetrical weight (14) driven by an electric moto (24). The motor and weight are suspended in a rigid fastening bracket. The fastening bracket (13) is fastened to a first side of a vibration dampening connection element (3) of an at least partly soft material. The fastening means is fastened to the other side of the vibration dampening connection element (3), such that the movement of the weight is transmitted through the fastening bracket (13), via the vibration dampening connection element (3) and the fastening device, to the baby buggy. The fastening bracket with motor a weight is enclosed by an outer cover (1, 2) which is not in contact with the fastening bracket, motor or weight. The outer cover is fastened to the vibration dampening connection element (3), such that vibrations from the motor and the weight are not transmitted to the outer cover.