49results about How to "Small change in angle" patented technology

An object of the present invention is to provide a pneumatic tire with improved uniformity and a method of manufacturing the same. The pneumatic tire 1 includes a carcass and a tread, wherein the carcass is covered with a carcass ply 10 with a top rubber in an array of carcass cords radially arranged therein. The carcass ply 10 includes: a center ply portion 11 that is wound around the tread portion 2 in the tire circumferential direction and whose start end and end end in the tire circumferential direction are joined to each other; and long rectangular plies positioned on both sides of the center ply 11 Part 12. In each elongated rectangular ply portion 12, an elongated rectangular piece 12a is formed by cutting the top layer rubber into a slit 13, and each elongated rectangular ply portion 12 is bent radially inward according to the outer shape of the sidewall portion 3 in the following manner, That is, the adjacent long rectangular pieces 12a are superimposed on each other to form the side portion 6S of the carcass.

The invention relates to an aircraft and provides an unmanned aerial vehicle based on coaxial multi-rotor-wing posture adjustment so as to solve the problems that an existing single-propeller aircraft is poor in reliability and large in power loss, a multi-axis aircraft is large in weight and poor in carrying capacity, and a coaxial double-rotor-wing aircraft is large in weight and poor in maneuvering performance. The unmanned aerial vehicle based on coaxial multi-rotor-wing posture adjustment comprises a vehicle core, an aircraft frame and a deflection adjusting mechanism; the vehicle core comprises a double-output driving mechanism, a frame and a coaxial multi-rotor-wing mechanism; and the double-output driving mechanism is mounted on the frame, the coaxial multi-rotor-wing mechanism is connected to the two output ends of the double-output driving mechanism, counter rotating propellers are arranged on the coaxial multi-rotor-wing mechanism, a deflection manipulating rod is connected to the bottom of the frame, and the deflection adjusting mechanism is mounted on the aircraft frame and can control the deflection manipulating rod to swing. The unmanned aerial vehicle based on coaxial multi-rotor-wing posture adjustment can be used for aerial photography, agricultural spraying and unmanned probe.

The device has two guideways, arranged parallel to each other, defining a guiding section. Positioning arms (1) are anchored at supports (5) and extends between the supports. The positioning arms are swivellably supported at hinge axes (16), which are perpendicular to the guiding section, in the area of the supports of the guideways. A connection axis runs between the hinge axes and transverse to the guideways.

The present invention provides a polymerizable compound with a structure of general formula I, which exhibits none or few of the problems existing in the prior art. A polymerizable liquid crystal composition comprising the polymerizable compound has good stability and higher reliability, and is embodied by having a smaller pretilt angle change and higher voltage holding ratio. Also, there is little or no image sticking effect in a liquid crystal display device comprising the polymerizable liquid crystal composition. The present invention also provides a method of synthesizing a polymerizable compound with a structure of general formula I. The present invention further provides a polymerizable liquid crystal composition comprising the polymerizable compound and a liquid crystal display device comprising the polymerizable liquid crystal composition.

The invention discloses a pitching arm with an operation chamber and a material taking machine. The pitching arm (1) comprises a first supporting table (3), the operation chamber (2), a fixed supporting beam (8) and a walking stairway (7), wherein a supporting rod (5) and a telescopic cylinder (6) stretch upwards on the first supporting table (3); a bottom plate of the operation chamber (2) is hinged to the supporting rod (5) and the telescopic cylinder (6); the upper end of the walking stairway (7) is hinged to the operation chamber (2); a slide is formed inside the walking stairway (7); the fixed supporting beam (8) is provided with a roller; and the roller slides along the slide during the leveling process of the operation chamber (2). According to the pitching arm, the connection manner of the walking stairway and the fixed supporting beam is designed as that the fixed supporting beam slides on the walking stairway, so that the angle change of the walking stairway during pivotal leveling of the operation chamber can be reduced, the steep degree of the walking stairway is reduced, an operator walks on the walking stairway more conveniently, and the safety is improved.

The invention provides a high-precision rotating positioning mechanism which is achieved by adopting the principle of a six-rod mechanism. A rotating disc bearing outer ring, a first sliding block, a connecting rod, a driving rod and a second sliding block serve as rod pieces in the six-rod mechanism respectively, and a rotating disc bearing inner ring, a base, a bearing, a first screw, a bearing check ring and a second screw jointly form a rod piece in the six-rod mechanism, wherein a rotating disc bearing serves as the output end, and the driving rod serves as the input end. The high-precision rotating positioning mechanism can meet the functional requirements of a spatial rotating platform for high-precision positioning and high-torque locking and has the advantages of being low in starting load, high in in-place precision, capable of achieving mechanism self-locking after in place and the like.

The invention provides a boom structure, an acquisition method for the load moment of the boom structure, engineering machinery and a measuring display meter, wherein the boom structure comprises a base boom, a first swing arm, a first connecting rod, a second connecting rod and a first driving part; the first end of the first swing arm is connected to the base boom by a first pivot; the first end of the first connecting rod is connected to the base boom by a second pivot; the second pivot is located at one side, far away from the first swing arm, of the first pivot; the first end of the second connecting rod is connected to the first swing arm by a third pivot; the third pivot is located at one side, far away from the base boom, of the first pivot; the second end of the second connecting rod is connected together with the first end of the first connecting rod by a fourth pivot; the first driving part comprises a first push rod; and the end part of the first push rod is connected to the fourth pivot. The technical scheme provided by the invention solves the problems of the prior art that change of a lifting arm of force in work of the boom structure is large, and further the load moment is hard to control.

A pull-push type rope locking device comprises a handle and is characterized in that a chuck is arranged at one end of the handle, and a clamping plate is arranged at the end, close to the chuck, of the handle. The clamping plate and the handle are connected through a connecting shaft. A reset spring is arranged between the chuck and the clamping plate. The clamping plate is provided with a clamping plate shaft hole. The handle is provided with a handle shaft hole. The connecting shaft penetrates the clamping plate shaft hole and the handle shaft hole so that the clamping plate can be hinged to the handle, and the upper end and the lower end of the connecting shaft are fixed through C-shaped clips respectively. The clamping plate and the handle are provided with a clamping plate reset hole and a handle reset hole respectively, and the reset spring is fixed to the clamping plate reset hole and the handle reset hole so that the pull-push type rope locking device can be maintained in a standby state. The chuck is provided with a chuck anti-skid protrusion, and the clamping plate is in a C shape or an L shape and is provided with an anti-skid protrusion. The clamping plate and the handle are coated with light reflecting materials for improving the warning effect. The clamping plate and the handle are made of metal materials or high-strength non-metal polymer materials.

The device has two guideways, arranged parallel to each other, defining a guiding section. Positioning arms (1) are anchored at supports (5) and extends between the supports. The positioning arms are swivellably supported at hinge axes (16), which are perpendicular to the guiding section, in the area of the supports of the guideways. A connection axis runs between the hinge axes and transverse to the guideways.