A mechanical arm assembly can include a link movable in space, an actuator, and a joint. The actuator can include a housing secured to the link and can include a cable within the housing, where the cable can be translatable relative to the housing and the link. The joint can include a main shaft, a main gear, a meshing gear, and a release plate.

The present invention discloses a line gear mechanism for rotation-movement conversion, comprising a driving line gear (1) and a driven line gear (2). A stagger angle between an axis of the driving line gear and an axis of the driven line gear is any value from 0 to 180. By a point contact meshing between a driving contact curve of a driving line tooth on the driving line gear (1) and a driven contact curve of a driven line tooth on the driven line gear (2), and by utilizing rotation of the driving line gear (1), it achieves that the driven line gear (2) rotates while moving smoothly. The line gear mechanism for rotation-movement conversion is simple in structure, easy to design, can achieve small displacement of movement, and is especially suitable for the conversion of small machinery from rotation to linear motion.

The present invention discloses a line gear mechanism for rotation-movement conversion, comprising a driving line gear (1) and a driven line gear (2). A stagger angle between an axis of the driving line gear and an axis of the driven line gear is any value from 0 to 180. By a point contact meshing between a driving contact curve of a driving line tooth on the driving line gear (1) and a driven contact curve of a driven line tooth on the driven line gear (2), and by utilizing rotation of the driving line gear (1), it achieves that the driven line gear (2) rotates while moving smoothly. The line gear mechanism for rotation-movement conversion is simple in structure, easy to design, can achieve small displacement of movement, and is especially suitable for the conversion of small machinery from rotation to linear motion.

A gear includes a circular base having a front surface that includes an inner region and an outer region that surrounds the inner region. The circular base is rotatable about a central axis. Plural gear teeth are arranged in a same row and extend outward from the outer region of the front surface and are evenly spaced from each other along plural locations on the outer region. Each gear tooth has a cross-sectional width that decreases with decreasing distance from the central axis, and has an outer shape configured to permit any one of the gear teeth in the row to contact and directly mesh with any gear tooth in a corresponding row of gear teeth of a substantially identical gear for any gear angle within a predefined range of gear angles between the central axis of the gear and the central axis of the substantially identical gear.

A gear includes a circular base having a front surface that includes an inner region and an outer region that surrounds the inner region. The circular base is rotatable about a central axis. Plural gear teeth are arranged in a same row and extend outward from the outer region of the front surface and are evenly spaced from each other along plural locations on the outer region. Each gear tooth has a cross-sectional width that decreases with decreasing distance from the central axis, and has an outer shape configured to permit any one of the gear teeth in the row to contact and directly mesh with any gear tooth in a corresponding row of gear teeth of a substantially identical gear for any gear angle within a predefined range of gear angles between the central axis of the gear and the central axis of the substantially identical gear.

A window shade system includes a first bracket coupled to a first pivot and rotatable at least within a first range of angles, a second bracket coupled to a second pivot and rotatable at least within a second range of angles, and first and second gears that each include a circular base rotatable about a central axis. Gear teeth are arranged in a same row and extend outward from the outer region and are evenly spaced from each other along the outer region of the gears. The first and second pivots are arranged relative to each other and relative to the central axes of the first and second gears, respectively, such that for any angle within the first range of angles, the gear tooth of the first gear meshes with the gear tooth of the second gear at a corresponding angle within the second range of angles.

A window shade system includes a first bracket coupled to a first pivot and rotatable at least within a first range of angles, a second bracket coupled to a second pivot and rotatable at least within a second range of angles, and first and second gears that each include a circular base rotatable about a central axis. Gear teeth are arranged in a same row and extend outward from the outer region and are evenly spaced from each other along the outer region of the gears. The first and second pivots are arranged relative to each other and relative to the central axes of the first and second gears, respectively, such that for any angle within the first range of angles, the gear tooth of the first gear meshes with the gear tooth of the second gear at a corresponding angle within the second range of angles.

One aspect is ring clip assembly including at least one ring clip having a ring portion surrounding an arm, the arm configured to define an aperture. The ring portion and the arm is separated thereby defining a slot between them. A shaft extends through the aperture in an interference fit, the arm configured to radially flex without contact from the ring portion. The ring portion has transmission elements on its outer perimeter configured to transmit movement to another member.

One aspect is ring clip assembly including at least one ring clip having a ring portion surrounding an arm, the arm configured to define an aperture. The ring portion and the arm is separated thereby defining a slot between them. A shaft extends through the aperture in an interference fit, the arm configured to radially flex without contact from the ring portion. The ring portion has transmission elements on its outer perimeter configured to transmit movement to another member.

A transmission includes an output shaft, a first gear rotatably mounted on the output shaft, a shuttle movably axially on the output shaft, and an engagement member fixedly mounted on the output shaft. The first gear includes first dog teeth. The shuttle includes second dog teeth which engage the first dog teeth. In a drive condition, the engagement member axially moves the shuttle into engagement with the first gear, first surfaces of the first and second dog teeth engage, and, as a result, the first gear rotates in together with the output shaft. In a freewheeling condition the output shaft is stationary, an overdrive of the first gear results in engagement of second surfaces of the first and second dog teeth, and, as a result, the shuttle moves out of engagement with the first gear allowing for free rotation of the first gear about the output shaft.