10 results about "Universal joint" patented technology

A method and apparatus for projecting an image of a patient to intersect a display screen which is nonperpendicular to an adjacent portion of an optical path and adjacent a sterile operative field. A video projector system and accompanying optics impart at least one of a tilted focal plane or depth of focus to the projected image. The optical path of the projected image is located adjacent the surgical field. An initially sterile display screen is located in the optical path adjacent the sterile field so that a normal to the screen is noncoincident with the optical path and the projected image on the screen is of constant focus across the screen. The initially sterile display screen may be degradable upon cleaning and resterilization so that a new screen must be used with each procedure, thus insuring the optical quality and sterility of the screen. The display screen may be supported adjacent the surgical field by an articulated rod assembly. The rod assembly may have an upper rod shaped like a "dog leg" for providing easy access by the surgical team for rotating and moving the system up and down. A lower rod of the rod assembly may be connected to the upper rod with a universal joint for adjusting screen location and quickly moving the display screen out of the surgical field.

The invention belongs to the technical field of mechanical performance testing of materials and discloses a brittle material tensile test fixture. The brittle material tensile test fixture comprises an upper connector, a lower connector, an upper universal joint, a lower universal joint, an upper C-shaped groove, a lower C-shaped groove, an upper clamping end and a lower clamping end. The upper connector and the lower connector are respectively connected with a testing machine; the upper connector is sequentially connected with the upper universal joint and the upper C-shaped groove; the lower connector is sequentially connected with the lower universal joint and the lower C-shaped groove; the upper clamping end can be inserted into the upper C-shaped groove, and the lower clamping end can be inserted into the lower C-shaped groove. A conical angle between an upper conical surface of the upper clamping end and a lower conical surface of the lower clamping end is 15 degrees and meets the requirements in appendix 37 of ASME BPV VIII-1. By application of the brittle material tensile test fixture, automatic centering of samples in a testing process can be realized to further automatically eliminate bending moment in a loading process; discontinuous relative slide in a fixture system is avoided, and accordingly loading curve continuity is guaranteed; the samples can be clamped quickly, and convenience and rapidness are achieved; the fixture is available for tensile tests at the temperature ranging from the room temperature to 600 DEG C.

A cross for a universal joint includes a body including an outwardly extending trunnion and a bearing cup mounted on the trunnion. A thrust washer is disposed between the trunnion and the bearing cup. The thrust washer includes an outer edge portion, a spacer portion that extends from the outer edge portion and is curved in cross sectional shape, a spring portion that extends generally radially inwardly from the spacer portion and is shaped generally in the form of a hollow cone, and an inner lip portion that extends inwardly from the spring portion. The thrust washer absorbs thrust loads that occur between an outer end surface of the trunnion and an inner surface of a closed end of the bearing cup and takes up any axial looseness therebetween.

Disclosed is a 360° universal joint jump rope, comprising a steel wire rope, two ends of the steel wire rope being provided with silicone protective cases, the steel wire rope being connected to two handles by using universal joint connecting buckles, the universal joint connecting buckle comprising a first rotating block, a second rotating block, and a central block, the first rotating block and the second rotating block each being symmetrically provided with two connecting plates, the first rotating block being provided with a connecting hole, and the second rotating block being provided with a threaded connecting rod. In the foregoing component assembly manner, for the 360° universal joint jump rope of the present utility model, the handles are provided with the universal joint connecting buckles, which enlarges motion angles between the handles and the rope when the jump rope is used, making the jump rope more flexible.

The invention belongs to the technical field of train carriage connection, and particularly relates to a train carriage connecting mechanism based on a universal joint. The train carriage connecting mechanism comprises shock absorption mechanisms, a rear carriage connecting mechanism, a front carriage connecting mechanism, a thrust correctional mechanism and connecting rods. The rear carriage connecting mechanism and the front carriage connecting mechanism can form the universal joint, the connection between adjacent carriages is damaged by rigid interference occurring between the adjacent carriages during the transfer of tension, and through the universal joint, the rigid interference can be reduced. At the same time, two first connecting columns are separately installed in circular holesin the two symmetrical side surfaces of a U-shaped groove of a first U-shaped connecting plate through bearings, and a second connecting column and a third connecting column are separately installedin circular holes in the symmetrical side surfaces of a U-shaped groove of a second U-shaped connecting plate through bearings. The connection between the adjacent carriages is damaged by the frictionof the adjacent carriages during the transfer of tension, and through the bearings, the friction of the adjacent carriages during the transfer of tension can be reduced.

The invention discloses a numerical-control four-station rotary table type tool. The four-station rotary table type tool is adopted on the basis of the prior art, rotation to required stations is performed through a rotary table according to different machining requirements of workpieces, a drill is adjusted for the workpieces through an adjustable drill clamp and a universal joint according to single lateral side machining requirements of certain categories of products or one product to meet machining requirements, and drills can be replaced or one-time clamping can be carried out to completeintegral drilling machining. Due to the adoption of numerical control for the numerical-control four-station rotary table type tool, the overall precision and working efficiency are improved, and daily maintenance can be performed more conveniently and quickly.

The invention relates to a gearbox of a loader. The gearbox comprises a split gearbox body and a hydraulic torque converter. A hydraulic torque converter output flange and a gearbox body input flange are connected through a universal joint, a transmission structure in a box body is reconstructed, the split torque converter matched with the transmission structure is designed, meanwhile, an operation gear is simplified to be a three-advancing one-retreating manner, and a hydraulic control pilot valve is used for control. The gearbox can be matched with high-power engines, and reasonable output torque can be obtained.

The invention discloses a rotary steerable drilling tool. The rotary steerable drilling tool comprises a screw rod, a rotary steerable drilling tool body, a connecting rod, a drill bit and a control module. a first driving motor is connected to one end of the screw rod, and one end of the rotary steerable drilling tool body is connected with the other end of the screw rod; one end of the connecting rod is connected with the other end of the rotary steerable drilling tool body; the drill bit is arranged at the other end of the connecting rod through a universal joint, wherein a groove extendingtowards the inside of the connecting rod is formed in one end of the connecting rod, and a transmission part is arranged at the other end of the rotary steerable drilling tool body; the transmissionpart is positioned in the groove, the transmission part comprises a second driving motor arranged at the other end of the rotary steerable drilling tool body and a rotating part arranged on an outputshaft of the second driving motor, and the rotating part is fixedly connected with the inner wall of the groove; and the control module includes a rotating speed sensor and a controller. The rotary steerable drilling tool is reasonable in design, simple in structure and low in cost, and has extremely high popularization value.

The invention discloses a universal joint operation adjustable fixed operation channel, which comprises opening plates, movable supports and tissue clamps, the opening plates are semi-cylindrical, the two opening plates are symmetrically placed, the front sides and the rear sides of the two supporting plates are connected through the movable supports, and the tissue clamps are detachably mounted on the outer side walls of the opening plates; a threaded rod is arranged in the center of the movable support, a plurality of threaded rings are movably installed on the threaded rod, supporting rods are hinged to the left side and the right side of the threaded rod respectively, and the other ends of the supporting rods are hinged to the opening plate. The tissue clamp is formed by symmetrically installing two identical tissue clamps. A stable operation channel is arranged, the size of the channel can be adjusted, the application range is wide, operation time is saved, and risks are reduced; important tissues such as blood vessels, nerves, ligaments and tendons can be protected by the distraction plate, accidental injury in an operation is avoided, and the operation risk is reduced; the incision edge tissue is clamped through the two tissue clamps, tissue fluid leakage is reduced, the situation that the vision is affected by the soft tissue is avoided, and the operation efficiency is improved.