10results about How to "Reduce lateral displacement" patented technology

This application provides a fixture and method for clamping and machining thin-walled welded parts, relating to the field of fixture and tooling technology. The fixture includes a base mechanism, a central positioning mechanism, an angular positioning structure, an auxiliary support mechanism, and a clamping mechanism. The base mechanism uses a disc and multiple circumferentially arranged elongated plates to form a support surface; the central positioning mechanism mates with the positioning inner hole of the part to achieve central positioning; the angular positioning structure mates with the angular hole of the part to achieve angular positioning; the auxiliary support mechanism is set for each lug to be machined, using V-shaped supports and lateral limiting components to provide auxiliary support and limit the lugs to be machined; the clamping mechanism clamps the part to the clamping reference surface. This solution can improve the clamping stability, positioning accuracy, and local rigidity during machining of thin-walled welded parts, reduce vibration and lateral displacement of the lugs to be machined, and reduce the risk of cracking at the weld joint.

The invention belongs to the technical field of seismic resistance and rail restraint of urban rail traffic engineering, and relates to a transverse steel rail restraint device which comprises two sets of steel rail fasteners and two sets of limiting assemblies, each limiting assembly comprises a mounting base, an abutting protrusion, thermal bimetal, a disc-shaped force transmission piece, an elastic piece and a limiting rod, and the elastic piece is arranged on the outer side of the limiting rod in a sleeving mode. A mounting groove is formed in one end of the mounting base, the elastic piece, the disc-shaped force transmission piece, the thermal bimetal and the abutting protrusion are sequentially arranged in the mounting groove, the elastic piece abuts against the bottom wall of the mounting groove, and one end of the limiting rod is connected with the bottom wall of the mounting groove. The thermal bimetal comprises a first metal layer and a second metal layer which are sequentially arranged, and the thermal expansion coefficient of the first metal layer is larger than that of the second metal layer. The abutting protrusion is arranged on the side, away from the second metal layer, of the first metal layer and used for abutting against the side face of the steel rail. The transverse restraining device for the steel rail can prevent double failures that transverse displacement of the steel rail exceeds the standard and longitudinal stress exceeds the limit.

This utility model belongs to the field of photovoltaic (PV) brackets, and discloses a column structure and a PV bracket. The column structure includes a column body and a reinforcing member. The reinforcing member is disposed on at least one side of the column body and extends along the height direction of the column body. At least a portion of the cross-section perpendicular to the height direction of the column body is a closed cross-section. This utility model, by providing a closed-section reinforcing member on at least one side of the column body, improves the overall bending, torsional, shear, and tensile strength compared to open-section or flat components. It also increases the contact area with the soil, further enhancing its tensile and bending strength. Furthermore, by improving the overall performance of the column body through the reinforcing member, there is no need to increase the cross-section of the column body, saving materials.

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 invention provides an improved structure of a pressing type waterway switching device, which comprises a water distribution main body provided with a water inlet passage, a water distribution assembly and water outlet holes, a waterway switching chamber is arranged in the water distribution assembly, and water flows into the waterway switching chamber from the water inlet passage and is communicated with any water outlet hole; the water path switching valve element is arranged in the water path switching cavity, an ejector rod moves upwards and axially to influence the water flow direction of the water path switching cavity, and the water inlet channel is at least communicated with one water outlet hole; the pivoting top plate comprises a frame, a pivoting shaft and a middle elastic guide strip; one end of the middle elastic guide bar, which is far away from the pivoting shaft frame, is upwards provided with a groove, and the other end is provided with a bent end on the same side with the pivoting shaft; the groove abuts against the lower end of the movable piece, the groove relatively enables the lower end of the movable piece to have a transverse redundant space, the bent end abuts against the water distribution body, the pivot joint top plate is stressed to rotate upwards to enable the lower end of the movable piece to have arc-shaped displacement, upward axial displacement is guaranteed, and water path switching and conduction are achieved.

The utility model relates to the technical field of correcting instruments, and discloses a back supporting and posture correcting belt. The back support comprises a fabric layer and a wing-shaped supporting plate, and the fabric layer is used for making contact with the human body in an attached mode to increase the comfort degree; the number of the wing-shaped supporting plates is two, the two wing-shaped supporting plates are attached to the fabric layer in a bilateral symmetry mode, the wing-shaped supporting plates are used for being attached to and supported on the lower posterior saw muscle and the middle-lower erector spine muscle on the corresponding sides, and the two wing-shaped supporting plates cooperate to jointly support the spine from the two sides of the spine and limit the spine. The middle and lower erector spine muscles of the human body can be covered, the design of the wing shape conforms to the natural radian of the lumbar vertebra and fits the waist curve, necessary supporting force is provided for posterior sawed muscles, erector spine muscles and other peripheral muscular tissues, and the activity in other directions is not limited while the spine is supported and fixed; the supporting structure aims to solve the technical problems that an existing supporting structure of a posture correcting belt is insufficient in supporting strength, insufficient in lumbar vertebra covering and poor in biomechanical adaptability.

The utility model discloses a punching device for processing an outer door plate of a cab, and relates to the technical field of door plate processing, the punching device comprises a mounting rack, the top of the mounting rack is provided with a bidirectional adjusting guide rail, and the bidirectional adjusting guide rail is used for driving a drilling mechanism to adjust the position; the placing plate is mounted at the lower end of the inner side of the mounting frame and is used for placing an outer door plate; the clamping pieces are mounted on the mounting frame, and the two clamping pieces are matched to be used for clamping and limiting the outer door plate; and the drilling mechanism is mounted on the two-way adjusting guide rail on the mounting frame and is used for drilling the outer door plate. According to the punching device for machining the outer door plate of the cab, through transmission of the two-way adjusting guide rail and the gear and the rack, three-dimensional precise positioning of the drilling machine in the horizontal direction and the vertical direction is achieved, positioning errors are reduced, the limiting sleeve is matched with the fastening bolt, the drilling machine is effectively prevented from moving downwards due to vibration, the consistency of the hole diameter is ensured, and the punching device is particularly suitable for high-precision hole site machining.

The application provides a fuel cell engine shell vibration impact resistance performance improvement method, comprising the following steps: establishing a finite element mechanics performance simulation model; defining relative constraint position design parameters of the fuel cell engine shell; analyzing responses of the shell and the fuel cell stack finite element model under different test conditions; modifying each defined design parameter and simulating until a model response result set is obtained; combining structure and working characteristics of the fuel cell engine shell and the fuel cell stack, determining a vibration impact resistance performance evaluation index, establishing a link between the response result and the performance; screening to obtain a design parameter range meeting the requirements, determining an optimal design parameter combination according to the fuel cell stack response result; and obtaining a final shell structure after local adjustment of the shell structure. The application can improve the overall vibration impact resistance performance of the fuel cell engine.

The application discloses an assembled self-resetting energy dissipation bridge block, which comprises a block, wherein the block is connected to the outrigger of the cap beam on both sides through prestressed reinforcement, a damper is connected between the side surface of the block and the side surface of the cap beam body, a rubber pad is connected to the upper part of the side surface of the block, and the rubber pad is arranged on the side surface of the beam body above the cap beam. The assembled block is used to replace the fixed block, the block is arranged at the outrigger of the cap beam, the block and the outrigger of the cap beam are connected through the prestressed reinforcement, a disc spring is arranged at the top end anchoring position of the prestressed reinforcement, the tensioning of the prestressed reinforcement is realized, the installation stability of the block is ensured, the lower part of the side surface of the block is connected to the cap beam body through the U-shaped damper, and the rubber pad is arranged on the upper part of the side surface of the block. The transverse displacement of the block is effectively reduced, the damper can drive the block to reset, the residual deformation caused by vibration is reduced, the impact of the upper beam body structure on the block is buffered, and the self-resetting capacity of the whole anti-seismic block system is improved.

The present application relates to the technical field of bridge seismic resistance, and particularly relates to an anti-seismic block structure and a bridge anti-seismic block system. Under the action of transverse bridge seismic force, the main beam moves along the transverse bridge direction with the fixed block, and the fixed block contacts with the sliding block during the movement, and pushes the sliding block to move on the base friction surface. Since the sliding block is in contact pressure with the base friction surface, the friction force generated will hinder the transverse movement of the main beam, so as to achieve the purpose of limiting the transverse movement of the bridge main beam. The friction force generated by the movement of the sliding block on the base friction surface dissipates the seismic energy, and reduces the transverse displacement of the main beam. Then, the limiting block is used for the final limiting. The cooperation of the two hindering structures makes the speed of the main beam continuously decrease during the transverse movement, so as to control the horizontal collision force generated on the limiting block. The size of the friction force generated during the transverse movement can be adjusted through the geometric form of the base friction surface and the friction coefficient, so as to reduce the horizontal shear force transmitted to the pier, and realize the control of the seismic response of the pier.