9results about How to "Reduce pressure per unit area" patented technology

The invention discloses a vault door capable of preventing illegal prying, and relates to the technical field of vault protective doors, the vault door comprises an embedded frame, a vault door body and a locking module, the vault door body is hinged to the embedded frame through one side wall, the locking module is fixedly connected with the vault door body, the locking module is embedded in the embedded frame, and the vault door further comprises a monitoring feedback assembly and a resistance adding assembly, the monitoring feedback assembly and the resistance adding assembly are located on the same vertical plane. By means of the design of the resistance adding assembly, the situation that illegal invasion behaviors cannot be effectively prevented when lawbreakers implement illegal prizing behaviors, and serious threats are brought to property safety in the vault can be effectively avoided; by means of the design, the defects that in the prior art, the anti-prizing performance is insufficient, and prizing is passively borne are overcome, resistance interference can be added when the warehouse door is prized, prizing is passively accepted through the difference, and an active resisting mechanism is provided.

The utility model relates to gas pipe correction technical field especially, it relates to a kind of PE gas pipe correction clamp, solve the problem that the pipe wall is prone to local indentation, flattening or stress concentration, and new plastic deformation is easily caused in the clamping area of pipe body when only applying correction force from outside in prior art due to the certain flexibility and elasticity of PE material.A kind of PE gas pipe correction clamp, including frame, both sides of frame are fixedly connected with side plate, and the opposite side of two side plates is equipped with arc clamping plate, and the bottom of two arc clamping plates is slidably connected between the bottom of frame, both sides of frame are equipped with support rod, and the one end of two support rods is respectively through both sides of frame.The utility model effectively solves the problem that pipe wall is prone to flattening, indentation or uneven stress due to lack of inside support in existing correction clamp, realizes the simultaneous support and uniform stress of inside and outside of PE gas pipe.

The application discloses a crankshaft transmission mechanism for an engine, which comprises a crankshaft and a connecting rod, a crank arm and a balance weight are integrally formed and are connected through a smooth transition of a concave arc surface; a first boss in a ring shape is arranged on the outer side surface of the crank arm near the two ends of the crankshaft, and the radial outer contour of the first boss extends to be tangent to the concave arc surface; the end surface of the one end of the crank arm where a connecting rod journal is located is a circular arc surface, is concentric with the connecting rod journal, and has a diameter smaller than the outer diameter of the axial end surface of the big end of the connecting rod. The radial size of the first boss is enlarged to increase the contact area with the inner wall of the shell to reduce the surface pressure, meanwhile, the big end of the connecting rod is exposed to the axial end surface to form a lubrication exposed area through the circular arc surface, so that forced lubrication and cooling are realized; and through the structure that the end surface of the driving gear is integrated into a contact surface, the semi-ring second boss surface is axially positioned, the connecting rod journal is thickened, and the eccentric mass block of the balance shaft is recessed to avoid, the wear resistance, the lubrication and heat dissipation performance, the structural strength and the running stability of the crankshaft transmission mechanism are simultaneously improved under the compact layout.

The invention provides a piston rod for a piston hammer and the piston hammer, the piston rod of the piston hammer comprises a piston main body section and a piston guide section which are fixedly connected, and a striking hammer head arranged at the lower end of the piston rod, and the piston main body section and / or the piston guide section are / is a polyhedral rod. An outer contact plane or an outer contact approximate plane is arranged on at least one side, deviated when the piston rod is knocked, of the outer wall of the polyhedral rod, so that the piston rod is in surface contact with a piston cylinder body of the piston hammer and / or the inner wall of the guide sleeve at least at the outer contact plane or the outer contact approximate plane; the contact area between the deviated side of the piston rod during knocking and the piston cylinder body and / or the guide sleeve is increased, the unit area pressure of the deviated side is reduced, a hydraulic oil film at the deviated side is not prone to being squeezed away by deviated knocking force, the lubrication degree of the deviated side is guaranteed, metal friction at the deviated side is greatly reduced, and the service life of the piston rod is prolonged. Abrasion of the outer wall of the piston rod and the inner wall of the piston cylinder body and / or the guide sleeve is avoided, the cylinder score phenomenon is avoided, and the hydraulic piston hammer is durable.

The invention discloses a medical drag hook, and belongs to the technical field of medical equipment. One end of the connecting rod is connected with the grab handle, the other end of the connecting rod is a mounting end, and the mounting end is of a bent rod structure; the retractor head is arranged at the mounting end and is of a plate type structure, one side face of the retractor head is a contact face used for making contact with human tissue, an expanded outer edge is arranged on the outer edge of the contact face and used for increasing the contact area between the contact face and the human tissue, and the other side face of the retractor head is a reflecting face. And a main reflector is arranged on the reflecting surface. Compared with the prior art, the retractor can hook and pull human tissues, so that the visual range is expanded, meanwhile, the head of the retractor is further provided with the reflecting mirror, the main reflecting mirror can reflect the affected part of the human body or some parts difficult to observe directly according to the control of medical personnel, and the visual range is further expanded. The problems that a traditional medical drag hook is single in function, low in applicability and the like are solved.

The utility model relates to a technical field of joint mechanism, especially a joint mechanism of worm wheel box, including: box, the worm wheel and worm structure is included in the box, and the worm end part is equipped with the shaft coupling, the shaft coupling includes: first half coupling, first half coupling is installed in the worm end part, second half coupling, second half coupling is connected on first half coupling through intermediate element, intermediate element, intermediate element includes disc body, and the both sides of disc body are equipped with the boss that is perpendicular to each other, installation layer, installation layer is covered in the boss, and is equipped with a plurality of even distribution rollable ball on the installation layer, the boss cooperation is installed in the recess of half coupling, and the installation layer is between half coupling and intermediate element, the utility model reduces the motion resistance and component wear and tear obviously, promotes transmission efficiency, and whole structure is composed of half coupling, intermediate element and installation layer simultaneously, and the number of parts is few, and the assembly relation is simple, effectively simplifies the installation process, and reduces the assembly difficulty.

The utility model relates to the technical field of welding, in particular to a resistance welding electrode assembly which comprises a first electrode and a second electrode, the first electrode comprises a first electrode body and a first electrode cap, and the second electrode comprises a second electrode body and a second electrode cap. The second electrode cap is provided with a second end face, and the diameter of the first end face is larger than that of the second end face. Through accurate heat distribution, the welding parameter adjusting frequency is reduced, long-time stable welding is achieved, the production takt time can be effectively shortened, the comprehensive manufacturing cost is reduced, and the requirement of industrial production for efficient and stable welding is met.

The utility model discloses a lifting device and a lifting connection device. The lifting device comprises a supporting structure, the supporting structure comprises at least one supporting assembly, the supporting assembly is used for containing a base plate, each supporting assembly comprises a first base, the first base is provided with a plurality of sets of supporting units, and the supporting units are connected with the base plate; the lifting structure comprises a driving part, the output end of the driving part is provided with a steering assembly, the steering assembly is connected with at least one lifting assembly and converts rotary motion into vertical motion, and the lifting assemblies are connected with the first base so as to drive the base plate to ascend or descend. According to the utility model, the single driving piece drives the lifting assemblies through the steering assembly, so that synchronous lifting of multiple supporting points is ensured, and inclination or clamping stagnation of the substrate is avoided; the steering assembly converts the horizontal rotating motion of the driving piece into the vertical direction, and the problem that the precision of a traditional pneumatic / hydraulic system is insufficient due to pressure fluctuation is solved.

The utility model relates to pipeline protection structure technical field discloses a kind of anticorrosive pipeline protection structures, including protective layer, the both ends of the outer side top and bottom of protective layer are fixedly connected with fixed block, the fixed block is connected with fixed ring by installation component, the left and right ends of the fixed ring are all set with clamping slot, detachably connected with horizontal plate in the inner wall of clamping slot, the similar end of horizontal plate is all fixedly connected with limit board, the protective layer is connected with support ring by fixed component, the inner wall of support ring is fixedly connected with support plate, the inner wall of support plate is provided with pipe body, the inner wall of protective layer is all set with limit slot in front and back end. In the utility model, air circulation is promoted by support ring air hole, sealing plate and protective layer cooperate to form multiple anticorrosive barriers, compared with traditional single coating more effectively insulate corrosive medium;Meanwhile, fixed ring, horizontal plate and limit board are used to increase soil contact area, load dispersion reduces settlement, and stability is better than traditional structure.