7results about How to "Reduce stress load" patented technology

This utility model discloses an engineering vehicle and its chassis, including a chassis body, a winch, and a winch support. The winch is installed on the rear side of the chassis body in the forward direction, allowing the winch performing traction work behind the chassis body and the working device performing construction work in front of the chassis body to operate independently or collaboratively without interference, thus improving equipment utilization and work efficiency. The winch support is installed on the chassis body located behind the winch, and the winch support has a rope guiding structure to limit the rope released from the winch. This utility model enables convenient collection of logs while meeting load-bearing requirements.

The invention discloses a mining control method based on coal mine excavation and mining filling and retaining coupling, and belongs to the technical field of coal mine mining control. The method comprises the following steps: constructing a physical similar model for simulating geological conditions of a target coal mine, excavating a simulated roadway according to a preset tunneling sequence to form a simulated mining surface, implementing simulated filling operation to form a simulated filling body, and reserving simulated coal pillars between the simulated roadway and the simulated mining surface to form a supporting structure; in the mining and filling process, overlying strata and ground surface subsidence displacement data are collected, a roof subsidence curve is drawn, wave crest and wave trough positions are identified, overlying strata movement differences are analyzed, the ground surface subsidence rate is calculated, and on-site actual mining parameters are guided accordingly; according to the method, the supporting effect can be optimized, the overlying strata movement rule can be accurately mastered, and the mining safety problem caused by insufficient data analysis and unreasonable supporting design in coal mine excavation and mining is solved; scientific guidance is provided for on-site mining parameter adjustment, and coal mining requirements under complex geological conditions are met.

The utility model is suitable for automatic vending machine technical field provides a kind of mesh positioning structure for automatic vending machine, including cabinet, the bottom of cabinet is provided with several trundle, the inside of cabinet is provided with positioning assembly, the positioning assembly includes four groups of shelf bar structure, the middle position of four groups of shelf bar structure is provided with positioning stand, one group of hook structure is respectively set between four groups of shelf bar structure and positioning stand, the top of positioning stand is provided with mesh, the mesh and positioning stand are fixedly connected, the shelf bar structure includes shelf bar body, the sidewall of shelf bar body is provided with several bolt mounting holes, the middle position of every two groups of bolt mounting holes is provided with several hook mounting holes, by setting mesh and positioning stand fixed connection, and four groups of shelf bar structure and positioning stand cooperate to form multiple support point, the weight of commodity is dispersed to positioning stand, shelf bar structure, and the stress load of single connecting point is greatly reduced.

The utility model relates to a kind of two-way limit lock, including box, limiting component and first drive mechanism;Box is equipped with containing area;Limiting component is rotatably located in containing area, limiting component includes oppositely arranged first limiting arm and second limiting arm, first limiting arm has first limit surface, second limiting arm has second limit surface, first limit surface and second limit surface are reversely arranged;First drive mechanism is located in box, the output end of first drive mechanism is connected to first limiting arm and second limiting arm, and first drive mechanism is used to drive first limiting arm and second limiting arm to rotate and switch between first initial position and first limit position.The utility model is responsible for the limit of one direction by two limiting arms respectively, and the stress concentration of traditional single limiting arm is decomposed into two limiting arms to bear together, which can reduce the stress load of single limiting arm, avoid the risk of fracture, and realize two-way reliable limit.

The utility model relates to the technical field of forklifts, and discloses a telescopic forklift with a leveling function, which comprises a cab, a fork frame component, a movable component, a support rod and a base, and is characterized in that a screw is spirally inserted into a screw hole to correspond to the insertion of a sliding plate and fix the position of a center block after the center block moves; according to the lever principle, the extension of the force arm can reduce the driving force required by the telescopic rod and reduce the pressure load of the second hydraulic rod, so that the telescopic rod can easily push the force bearing plate to rotate and move, and the force bearing assembly can be conveniently adjusted. And the fork frame can be easily kept in a horizontal state when the materials are inserted and taken, the situation that the materials inserted and taken by the fork frame are too heavy, consequently, stability of hydraulic pressure of the second hydraulic rod is affected is prevented, and failure and leakage of a telescopic rod sealing piece caused by too large pressure load are avoided.

A new type of connecting rod type arm includes an arm, the tail of the arm is provided with a connecting rod mechanism, the connecting rod mechanism includes a cylinder, a connecting rod and a seat rod which are hinged with the arm in sequence from front to back, in the initial state, the cylinder and the seat rod are both in vertical state, and the connecting rod is in horizontal state; the separate arm is changed into the connecting rod type arm structure, on the one hand, the cylinder can be vertically installed, and on the other hand, the structural strength of the arm structure can be enhanced, the pressure load of the cylinder is reduced, and thus the failure rate of the overall structure is reduced.

The invention discloses a digital remote intelligent interactive teaching device, and belongs to the technical field of head-mounted intelligent VR glasses, the device comprises a VR teaching glasses main body, the VR teaching glasses main body is used for displaying teaching content, a binding part is installed on the VR teaching glasses main body, and the binding part binds the VR teaching glasses main body to the head of a user. The binding part is fixedly connected with a connecting belt, the tail end of the connecting belt is connected with a wearing part, the connecting belt is provided with an adjusting assembly, the connecting belt or the tension part generates tension towards the back of the neck, indirect traction stress of the gravity of the VR teaching glasses body to the neck can be effectively counteracted, and the stress load of the neck is reduced; when the head is lowered, the tension can dynamically counteract the load increased by the gravity of the glasses, and when the head is raised, the tension is naturally weakened without causing extra traction; the tension can be adjusted by adjusting the buckle or the adjusting part according to users with different neck lengths and heights, and the tension distribution is more balanced through the symmetrically arranged connecting belts and the tension parts.