41results about How to "Increased connection contact area" patented technology

The invention discloses a shaft connection structure. The shaft connection structure comprises a connecting shaft, wherein the connecting shaft is hollow, and two ends of the connecting shaft are in communication; the input end of the connecting shaft is detachably and fixedly connected with a turbine disk of a turbine component through a fixed connecting piece, so that relative motion between theconnecting shaft and the turbine disk is avoided; a limiting step which is protruded facing the center of a shaft hole is arranged in the shaft hole of the output end of the connecting shaft; the output end of the connecting shaft is connected with a gas compressor rear shaft journal of the gas compressor component through an internal and external spline structure; an axial limiting member is fixedly mounted in the shaft hole of the gas compressor rear shaft journal, and is used for propping the limiting step to enable the connecting shaft to be in rigidity connection with the gas compressorrear shaft journal, then the power transmitted by the turbine disk to the connecting shaft is smoothly transmitted to the gas compressor rear shaft journal, and besides, the axial limiting member andthe propping limiting step are also used for preventing the connecting shaft to slide towards the turbine disk in the axial direction. According to the shaft connection structure disclosed by the invention, the power can be smoothly transmitted to the gas compressor rear shaft journal by the connecting shaft, and the power transferring quality is good.

The invention provides an IGTO packaging structure, including a GTO device and a drive circuit board. The GTO device includes an insulating case, and the anode of the GTO device is also used as the anode of the IGTO device in the middle of the top of the insulating case; There are two annular structures spaced up and down on the outer surface, the upper annular structure is the gate electrode ring of the GTO device, and the lower annular structure is the cathode ring of the GTO device; the cathode ring of the GTO device is discontinuous and has at least one gap; Part of the cathode ring of the GTO device is inserted into the mounting hole on the drive circuit board through the gap, and then rotated so that the GTO device is inserted into the mounting hole of the drive circuit board, and the cathode ring and gate ring of the GTO device are respectively located on the drive circuit board. On the reverse side and the front side of the board, the gate electrode ring and the cathode ring of the GTO device are respectively closely contacted and electrically connected to the first electrical connection areas on the front and back sides of the drive circuit board. The lead wire of the invention has small inductance, good heat dissipation performance, and is convenient for crimping and use.

The present application relates to a pipe connection structure for municipal water supply and drainage, relating to the field of municipal engineering facilities, which includes a first connection seat fixedly connected to the first pipe, a second connection seat fixedly connected to the second pipe, and the first connection seat The upper part is fixedly connected with the first connecting pipe connected with the first pipe, and the second connecting seat is fixedly connected with the second connecting pipe connected with the second connecting pipe. The ring-shaped socket slot is slidably inserted, and the socket-connecting pipe 2 is provided with a filling device for filling the gap between the socket-connecting pipe 2 and the inner groove wall of the ring-shaped socket. A fixing device for connecting and fixing the first connecting base and the second connecting base. The application has the effects of improving the maintenance frequency of pipelines caused by bolt corrosion and reducing the consumption of manpower and energy.

The present disclosure relates to an unmanned aerial vehicle with a frame reinforcement structure. The drone includes: an upper substrate; a circuit board, the circuit board is located below the upper substrate in the height direction of the drone and is arranged roughly parallel to the upper substrate, and the upper substrate and the circuit board are fixed to each other through a plurality of connecting columns; and a reinforcing member, the reinforcing member is arranged between the upper substrate and the circuit board and the reinforcing member is used to connect the upper substrate and the circuit board to strengthen the structural strength of the upper substrate and the circuit board, at least two of the upper surfaces of the circuit board cross each other In the direction of , the reinforcing member includes a plurality of connection parts respectively extending along at least two directions intersecting with each other, and the connection parts are fixed to each other. The reinforcement is light in weight and takes up a relatively concentrated space, which can reserve a large overall space for other devices, which is beneficial to the layout of the drone. Moreover, the reinforcing member can increase the connection contact area between the upper substrate and the circuit board, thereby enhancing the overall structural strength and stability of the rack.

The invention provides a fixture device for machining a lower wire outlet base of a solid-sealed polar pole on a general machine tool. The fixture device comprises a base plate; a front plate is vertically arranged at one end of the upper end face of the base plate; a front jacking component for horizontally and axially jacking the lower wire outlet base is arranged on the front plate; a rear plate is vertically arranged at the other end of the upper end face of the base plate; a cushion block is arranged at the inner side of the rear plate; a left supporting plate and a right supporting plate are respectively arranged at the two sides of the middle part of the upper end face of the base plate; an upper positioning plate is supported on the upper end faces of the left and right supporting plates; a tapered iron pressing component for vertically and radially pressing the lower wire outlet base is arranged on the base plate between the left and right supporting plates; the front jacking component moves forwards to axially push one end face of the lower wire outlet base so that the other end face of the lower wire outlet base is tightly pressed on the cushion block in order to realize axial positioning; the tapered iron pressing component moves via a bevel so that the lower wire outlet base can be lifted in the radial direction and the upper plane of the lower wire outlet base is horizontally close to the lower plane of the upper positioning plate in order to realize radial positioning. The fixture device disclosed by the invention is capable of guaranteeing the precision of a lower wire outlet base product machined by a general machine tool so that the electric conductivity of a resistance loop of the solid-sealed polar pole is good, the potential safety hazards are reduced, and the manufacturing cost and machining cost can be greatly lowered.