80results about How to "Prevent mutual rotation" patented technology

A robotic link mechanism comprising a pair of base elements connected by a passive flexible joint, such that flexure of the joint changes the mutual orientation of the base elements. A pair of obliquely truncated cylinders are confined between the base elements such that the obliquely formed end surfaces of the cylinders can rotate in sliding contact with each other, and the other end of each cylinder can rotate in sliding contact with its associated base element. Driving motors are attached to the base elements, each one controlled to rotate the cylinder associated with that base element, such that rotation of at least one of the cylinders causes the base elements to undergo change in their mutual orientation. The mechanism thus has a backbone composed of the passive flexible joint, which is supported and actuated by the oblique truncated cylindrical structure that serves as an active exoskeleton.

A personal digital assistant having a double spindle hinge capable of openably and rotatably unfolding two casings foldably and rotatably joined to each other and holding the attitude of the unfolded casings. The personal digital assistant comprises the first casing, the second casing, and the double spindle hinge connecting the first and second casings to each other so as to be opened and closed and rotated relative to each other. The double spindle hinge further comprises an open / close shaft part installed in the first casing, a housing held on the open / close shaft part in the state of rotatable about an axis in the axial direction of the open / close shaft part, and a rotating shaft part connecting the housing to the second casing rotatably relative to each other about an axis in the vertical direction to the axial direction of the open / close shaft part. The rotating shaft part further comprises a first engagement part at the side end part of the housing, the open / close shaft part comprises a second engagement part engageable with the first engagement part, and the first engagement part and the second engagement part (A) are disengaged from each other when the first casing and the second casing are opened to a specified angle so that the first casing and the second casing can be rotated relative to each other and (B) are engaged with each other when the open / close angle of the first casing and the second casing is not the specified angle so that the first casing and the second casing cannot be rotated relative to each other. Also, the first engagement part and the second engagement part are formed so that, in the state of (A) above, the combination of the cross section of the first engagement part with the cross section of the second engagement part can form a roughly circular shape.

The invention provides a coaxial type shifting fork structure. The coaxial type shifting fork structure comprises a mechanism base, a first shifting fork, a second shifting fork and a gear shifting execution mechanism. The first shifting fork and the second shifting fork are installed on the mechanism base through shifting fork shafts. The gear shifting execution mechanism comprises two shifting blocks, the shifting fork shafts comprise the first shifting fork shaft and the second shifting fork shaft, and the first shifting fork shaft and the second shifting fork shaft are coaxially installed in the mechanism base. The first shifting fork and the second shifting fork are installed on the first shifting fork shaft and the second shifting fork shaft correspondingly. The two shifting blocks are matched with the first shifting fork and the second shifting fork correspondingly. The coaxial type shifting fork structure is high in smoothness and simple in structure.

The invention discloses an expansion bolt with a clamping block. The expansion bolt comprises a bolt body (1) and an outer sleeve (2), wherein an axial sliding groove (11) is formed in the large end side of the bolt body (1), a matched sliding block (21) is arranged on the inner side wall of the outer sleeve (2), and the sliding block (21) is clamped into the sliding groove (11) and is slidably connected with the sliding groove (11). According to the expansion bolt, the sliding groove (11) is formed in the outer wall of the bolt body (1), the matched sliding block (21) is arranged on the outersleeve (2), the sliding block (21) is clamped into the sliding groove (11), therefore, when nuts on the bolt body (1) are screwed, due to the fact that the sliding block (21) is clamped in the sliding groove (11) all the time, the mutual rotation of the bolt body (1) and the outer sleeve (2) can be effectively prevented, and the nuts can be conveniently tightened.

An attachment system is provided for attaching an external component to a chassis of a vehicle, such as components for performing snow clearance, road measurements, road surface marking assemblies, transport of vehicles or gear, including salvaging work and transport of heavy duty vehicles. The attachment system includes at least an elongated chassis coupler element, a fastening mechanism for fastening the chassis coupler element to the chassis when in a mounted position, a distance element, and a clamping mechanism. The coupler element is shaped to fit inside a hollow space of the distance element, and the clamping mechanism is operable to control an insertion length of the coupler element into the hollow space thereby controlling the clamping of the distance element and the chassis when the attachment device is in a mounted position.