Disclosed is an apparatus for page-pressing and barrier-free page-turning. The apparatus includes page-pressing devices and a placement board. The page-pressing device is capable of switching between a first state and a second state. When the page-pressing device is in the first state, the page-pressing device is capable of tightly pressing against a book page(s) on the placement board. When the page-pressing device is in the second state, the page-pressing device is capable of releasing the press onto the book page(s). The page-pressing device is capable of mechanically self-locking to maintain a contact pressure to the book page(s) when the page-pressing device is in the first state to press against the book page(s), while the power causing the contact pressure no longer exists.

Disclosed is an apparatus for page-pressing and barrier-free page-turning. The apparatus includes page-pressing devices and a placement board. The page-pressing device is capable of switching between a first state and a second state. When the page-pressing device is in the first state, the page-pressing device is capable of tightly pressing against a book page(s) on the placement board. When the page-pressing device is in the second state, the page-pressing device is capable of releasing the press onto the book page(s). The page-pressing device is capable of mechanically self-locking to maintain a contact pressure to the book page(s) when the page-pressing device is in the first state to press against the book page(s), while the power causing the contact pressure no longer exists.

A gear box for a reciprocating kneader. A primary rotational gear is attached to a gear box primary shaft and rotates in concert therewith. A secondary rotational gear is engaged with the primary rotation gear and rotates therewith. A secondary shaft is attached to the secondary rotational gear and rotates therewith. A primary oscillation gear is attached to the gear box primary shaft and rotates therewith. A secondary oscillation gear is rotationally engaged with the primary oscillation gear and rotates on the secondary shaft. An eccentric is coupled to the secondary oscillation gear and rotates in concert therewith. A yoke is engaged with the eccentric and oscillates on an axis perpendicular to the secondary shaft in response to the lobe. The gearbox secondary shaft moves along its axis in concert with yoke oscillation. A housing is pivotally attached to the yoke and pivotally attached to a casing at a casing.

A gear box for a reciprocating kneader. A primary rotational gear is attached to a gear box primary shaft and rotates in concert therewith. A secondary rotational gear is engaged with the primary rotation gear and rotates therewith. A secondary shaft is attached to the secondary rotational gear and rotates therewith. A primary oscillation gear is attached to the gear box primary shaft and rotates therewith. A secondary oscillation gear is rotationally engaged with the primary oscillation gear and rotates on the secondary shaft. An eccentric is coupled to the secondary oscillation gear and rotates in concert therewith. A yoke is engaged with the eccentric and oscillates on an axis perpendicular to the secondary shaft in response to the lobe. The gearbox secondary shaft moves along its axis in concert with yoke oscillation. A housing is pivotally attached to the yoke and pivotally attached to a casing at a casing.

According to one embodiment, an arm structure includes a base, a first link, a second link, a connecting member, and a gravity compensation mechanism. The first and the second links are rotatable in a vertical direction. One end side of the first link is pivotally attached to the base via a first rotating shaft. One end side of the second link is pivotally attached to another end side of the first link via a second rotating shaft. A length of the first link is same as a length of the second link. The second link rotates around the second rotating shaft. A rotation angle of the second link is twice a rotation angle of the first link. A rotation direction of the second link is opposite to a rotation direction of the first link. The gravity compensation mechanism compensates for torque generated around the first rotating shaft by gravity.

According to one embodiment, an arm structure includes a base, a first link, a second link, a connecting member, and a gravity compensation mechanism. The first and the second links are rotatable in a vertical direction. One end side of the first link is pivotally attached to the base via a first rotating shaft. One end side of the second link is pivotally attached to another end side of the first link via a second rotating shaft. A length of the first link is same as a length of the second link. The second link rotates around the second rotating shaft. A rotation angle of the second link is twice a rotation angle of the first link. A rotation direction of the second link is opposite to a rotation direction of the first link. The gravity compensation mechanism compensates for torque generated around the first rotating shaft by gravity.

A transmission structure of an ozone testing machine has: a transmission frame, a rotation unit, a connecting unit, and a lifting unit. The transmission structure is connected to the lifting shaft and the lifting device via the connecting unit, the bottom of the sleeve of the connecting unit is provided with threaded member screwed to the threaded rod of the lifting device, and the sleeve is fixed onto the sliding member to achieve the linear displacement along the guiding track. During the clockwise and reverse rotations of the servo motor of the lifting device, the lifting shaft can achieve the synchronous operation of the rotation and lifting due to the limited connection with the connecting unit, thereby greatly improving the smoothness of the test process, while maintaining the static and dynamic tests.

A variable wobbler plate has a stub shaft and a pivot shaft. The pivot shaft has a smaller diameter portion and a larger diameter portion. The smaller diameter portion has a generally cylindrical outer periphery with a flat over a limited circumferential extent and a diameter to opposed portions of the generally cylindrical portion defining a first distance. A second distance is defined from an end of the smaller diameter portion spaced furthest from the stub shaft to an end of the larger diameter portion spaced closest to the stub shaft and measured along a central axis of the pivot shaft and defines a second distance. A ratio of the first distance to the second distance is between 0.60 and 0.75. An integrated drive generator and a method are also disclosed.

The invention discloses an automatic retracting and retracting device for a traffic cone, which includes a base body and a fixed plate. The base body is provided with a first movable cavity, the first movable cavity is provided with an intermittent pushing mechanism, and the first movable cavity is above the first movable cavity. A rotation cavity is provided, and a reciprocating rotation mechanism is provided in the rotation cavity. A second movable cavity with a rightward opening is provided above the rotation cavity. A retractable mechanism is provided in the second movable cavity. The rotation cavity is left. A first rectangular slot is provided on the side, a second rectangular slot is provided below the first rectangular slot, a transmission mechanism is provided in the second rectangular slot, a lower end wall of the first rectangular slot and an upper end of the second rectangular slot A first rotating shaft is rotatably installed between the walls, an upper end of the first rotating shaft extends into the first rectangular groove and a first bevel gear is fixedly installed, and a lower end of the first rotating shaft extends into the second rectangular groove. A middle bevel gear is fixedly installed in the middle.

A gear box for a reciprocating kneader. A primary rotational gear is attached to a gear box primary shaft and rotates in concert therewith. A secondary rotational gear is engaged with the primary rotation gear and rotates therewith. A secondary shaft is attached to the secondary rotational gear and rotates therewith. A primary oscillation gear is attached to the gear box primary shaft and rotates therewith. A secondary oscillation gear is rotationally engaged with the primary oscillation gear and rotates on the secondary shaft. An eccentric is coupled to the secondary oscillation gear and rotates in concert therewith. A yoke is engaged with the eccentric and oscillates on an axis perpendicular to the secondary shaft in response to the lobe. The gearbox secondary shaft moves along its axis in concert with yoke oscillation. A housing is pivotally attached to the yoke and pivotally attached to a casing at a casing.