17results about How to "Reduce bending moment" patented technology

The utility model discloses an upper cross beam structure of a closed four-point high-speed precision press, which comprises an upper cross beam, the upper cross beam is of a symmetrical structure, two ends of the upper cross beam are respectively provided with a mounting hole, each mounting hole is respectively provided with a first sliding bearing seat, and at least one mounting hole is provided with a flywheel seat; a first installation seat is arranged in the middle of the upper cross beam, a second installation seat is detachably arranged on the first installation seat, lower bearing seats are arranged at the two ends of the first installation seat respectively, upper bearing seats are arranged at the two ends of the second installation seat respectively, and each upper bearing seat and the corresponding lower bearing seat form a second sliding bearing seat. According to the technical scheme, the upper cross beam is of a unique split type structure, and the first installation base and the second installation base are connected through the attached installation planes and the bolts. On one hand, machining is facilitated, and the overall machining difficulty is reduced; and on the other hand, when the precision deviation of the hole system is detected, fine adjustment can be carried out by repairing the mounting plane.

The invention discloses a constant-pressure overflow device for pile sinking of a bamboo joint pile and a pile sinking method of the bamboo joint pile, the constant-pressure overflow device comprises a water bag assembly and a constant-pressure overflow valve, the water bag assembly comprises a soil bag and a framework pipe, and water is injected into the soil bag for providing support pressure for a pre-drilled hole; a counter weight lever type assembly of the constant-pressure overflow valve comprises a lever arm connected to a fulcrum shaft pin, the inner side of the lever arm is connected with a valve rod, the bottom end of the valve rod is connected with a blade valve element, when the constant-pressure overflow valve does not work, the blade valve element seals a water inlet, and when the constant-pressure overflow valve works, water flow in the water inlet can eject the blade valve element to flow out through a water outlet. A second balancing weight is arranged on the outer side of the lever arm, and the second balancing weight can hinder water flow in the water inlet through the lever effect. The supporting pressure in the water bag assembly can be ensured to be constant, and the problems that the geotechnical bag is burst and the pre-drilled hole collapses are avoided; due to the design of a large-diameter pipeline, pipeline blockage is avoided; and through cement-based grout replacement, the water bag assembly is converted into a geotextile bag concrete pile, and the foundation is permanently reinforced.

The utility model discloses a kind of wall cleaning devices suitable for coal powder bin, it is related to coal powder bin cleaning technical field.The utility model includes first support frame, the inside of first support frame is provided with adjusting assembly, adjusting assembly includes first fixed cylinder being installed on first support frame, first motor being installed on the inner wall top of first fixed cylinder, first gear being rotated and cooperated in the inside of first support frame, first sliding block being slidably cooperated in the opposite two sides of the inside of first support frame.The utility model is cooperated by first motor and first gear, and is engaged with first toothed plate, to ensure that the moving distance of two sides first sliding block is consistent, avoid structural deviation or jamming due to uneven stress, first sliding block and first support frame, avoid the shaking range of sliding block, ensure the straightness and stability in moving process, cleaning assembly is convenient for scraping and cleaning to the inner wall of coal powder bin.

This invention provides a method for fabricating a flexible heat transfer device with a channel-hemispherical composite topology structure. The method includes the following steps: Step 1: Designing a channel topology and a hemispherical topology arranged at intervals as the topological structure, with multiple hemispherical topologies between adjacent channel topologies; Step 2: Optimizing the design profile curve, design height, design period T1 of the channel topology, the design radius of the hemispherical topology, the design spacing T2 between multiple hemispherical topologies between adjacent channel topologies, and the design spacing T3 between two adjacent rows of hemispherical topologies based on fluid flow resistance, maximum bending stress, effective cross-sectional area, and maximum structural support force, and selecting the optimized channel topology and hemispherical topology; Step 3: Fabricating a flexible heat transfer device with the optimized channel topology and hemispherical topology from Step 2. The flexible heat transfer device fabricated using the topology optimization design of this invention can maintain high-efficiency heat transfer performance even after multiple bends.

The invention discloses a transmission structure and method of an oil injection pump and an electronic unit pump system, belongs to the technical field of engines, and solves the problems that a rotating shaft of an oil injection part is too large in torsional force and easy to damage. A transmission shaft sleeve used for being connected with an engine body is arranged at the end, close to a fuel injection pump cam shaft, of the fuel injection pump, a transmission shaft is rotationally arranged in the transmission shaft sleeve, an inner spline is arranged at one end of the transmission shaft, and a transmission outer spline sleeve is arranged on the inner spline. The transmission outer spline sleeve is sleeved on a fuel injection pump cam shaft of the fuel injection pump, a gear is arranged at the other end of the transmission shaft, a plurality of mounting grooves are arranged on the fuel injection pump on the outer side of the fuel injection pump cam shaft, and supporting bushes used for supporting the fuel injection pump cam shaft are arranged in the mounting grooves. According to the transmission structure and method of the fuel injection pump and the electronic unit pump system, the structure is compact, arrangement is convenient, camshaft faults are reduced, and the stability of the fuel injection pump is improved.

The application relates to an oscillating pulse screw drill tool with improved shaft stress, which comprises a drill tool body, a static valve assembly and a dynamic valve assembly. The drill tool body comprises a shell and a shaft, the shell is a hollow tubular structure, and the shaft is located in the shell and can rotate in the shell. The static valve assembly comprises a static valve shell coaxially connected with the shell, and a static valve flow channel is arranged in the static valve shell. The dynamic valve assembly is axially gap-connected with the static valve assembly, and comprises a dynamic valve seat fixed on the top of the shaft, and a dynamic valve flow channel is arranged in the dynamic valve seat. The dynamic valve assembly rotates eccentrically relative to the static valve assembly to periodically change the flow area between the static valve flow channel and the dynamic valve flow channel. The dynamic valve assembly of the application is gap-connected with the static valve assembly, the static valve assembly directly transmits the axial force borne by the static valve assembly to the static valve shell, and does not directly transmit the axial force to the dynamic valve assembly. Therefore, the shaft can bear additional axial force, rotating friction resistance and bending moment, the service life of the shaft and the bearing system of the screw drill tool is prolonged, and the efficiency of the whole screw drill tool is improved.

A counterforce frame device suitable for longitudinal prestress reinforcement of a shield tunnel, comprising a shield segment (1), a through hydraulic jack limiting box, a steel hinge line steering plate (21), a compression support structure and a tension support structure. The through hydraulic jack limiting box is a cuboid four-side box structure composed of a cover plate, a bottom plate, a locking surface plate and a compression baffle. The compression support structure comprises a high-strength quick connector (8), a solid compression rod (6), a variable cross-section section compression rod (5) and a lockable universal head sleeve (4). The tension support structure comprises a telescopic limiting rod (9), a limiting rod telescopic device (10) and a lockable universal head sleeve. The counterforce frame device has the advantages of light weight, small size, high flexibility, simple installation and removal; overcomes the installation defects of the traditional counterforce frame device caused by gravity and cannot be quickly moved; solves the problem of longitudinal tension reinforcement at different positions in the circumferential direction of the shield tunnel.

A humanoid robot arm gripper structure includes a mounting base, a power unit, a lifting device, and two gripping mechanisms symmetrically mounted on the mounting base. The mounting base has an inner cavity, and the lifting device is mounted within this cavity. The power unit is connected to the lifting device for driving its lifting motion. The gripping structure includes a first rod, a second rod, and a third rod. One end of the first rod has a first hinge and a second hinge. The first hinge is hinged to the lifting device, and the second hinge is hinged to the mounting base. The second hinge of the first rod is also connected to the mounting base, reducing the reaction force transmitted to the first hinge and thus ensuring the stability of the lifting device. Excessive pressure will prevent the lifting device from shaking, thus maintaining its stability.