10results about How to "Avoid shear stress" patented technology

The utility model discloses a burn -through ware of prolonging busbar service life belongs to burn -through ware technical field, including wiring copper bar, the inside of one side of wiring copper bar is equipped with a plurality of assembling screw holes, and the middle position of wiring copper bar is provided with the bending part, and the inside symmetry of wiring copper bar is equipped with busbar screw hole one end far from assembling screw hole, the utility model discloses the bending of wiring copper bar is formed bending part according to the required angle, then according to the running direction of burn -through ware busbar, the inside symmetry of wiring copper bar is equipped with busbar screw hole according to the required angle, and the edge of busbar screw hole is polished and is handled regularly, and the wear and tear of busbar is reduced, to avoid the burn -through ware busbar in the process of using the shearing force of bearing to the greatest extent, prolongs the service life of burn -through ware busbar, prevents the damage situation of busbar because of copper wire broken strand appearance damage, improves the use period of busbar, reduces the workload of replacing busbar, can also save production cost simultaneously.

The utility model belongs to the technical field of stackers, and particularly discloses a stacker traveling device which comprises a driving wheel seat, a traveling gear motor and a driving shaft, a driving wheel traveling on a ground rail is rotatably connected onto the driving wheel seat, the traveling gear motor is in transmission connection with the driving wheel through the driving shaft, and a guide wheel mounting frame is arranged on the front side or the rear side of the driving wheel seat. A groove used for being connected with a stacking machine in a matched mode is formed in the other side of the driving wheel base, the groove is a stepped groove with the upper portion shallow and the lower portion deep, a connecting protrusion is arranged on the stacking machine, the connecting protrusion and the groove are in central symmetry, and the connecting protrusion and the groove are connected in a matched mode to form a wedge-shaped structure, so that bolts on the driving wheel base are prevented from bearing shearing force. The guide wheels are in rolling connection with the side wall of the ground rail, and stable guiding is conveniently provided.

The invention belongs to the technical field of impact tests, and particularly relates to a material bottom tray balancing device based on a drop hammer impact test system. The balancing device is arranged between the tray and the supporting stand column and comprises a plurality of balancing units, the balancing units and the tray are located in the same horizontal plane, each balancing unit comprises a rolling clamping mechanism, and the rolling clamping mechanisms are arranged on the supporting stand column in a sleeving mode and move in a guiding mode along the supporting stand column. The plurality of balancing units and the tray are guided to move along the supporting upright post; and one end of the connecting rod is fixed on the rolling clamping mechanism, the other end of the connecting rod is fixed on the tray, and the connecting rod is also used for limiting the horizontal displacement of the tray on the basis of being linked with the tray. By arranging the balancing device, the balance of the tray does not need to be manually adjusted, the balance of the tray in the test process is guaranteed, the possibility that the rod body to be tested receives shear stress is completely avoided, and therefore the test precision degree and the test efficiency are greatly improved.

A pressure-controllable rat coccygeal intervertebral disc annular pressurizing device belongs to the field of testing. It includes a fixing component, a controllable pressure component, a pressure detection component and an on-site display component; the fixing component includes an annular first and second fixing plates; a pair of side ear type fixing seats and / or a pair of ring ear type fixing seats are arranged on each fixing plate; the controllable pressure component includes a fixing screw; one end of the fixing screw is fixedly connected to the first fixing plate, and the other end passes through the second fixing plate, and a spring and an adjusting nut are set in the package; the pressure detection component includes a pressure sensor; the on-site display component includes a pressure sensor display module with a display screen; the signal output end of the pressure sensor is correspondingly connected to the signal input end of the pressure sensor display module. It adopts a thin-film fixing component structure and a lightweight controllable pressure component, and uses mice as experimental subjects. The pressure process is continuous, stable and visualized on-site, which can meet the needs of multiple groups of simultaneous and experimental data comparison.

The utility model discloses a combined die for producing a uniaxial symmetrical metal section bar, which comprises an extrusion die, a die support, an extrusion needle and a die holder, the extrusion die comprises a first hole cavity, a first balance hole and a first positioning hole, and the die support comprises a second hole cavity, a second balance hole and a second positioning hole. The extrusion die and the extrusion needle form a pipe cavity, the extrusion die, the extrusion needle and the pipe cavity are coaxial, and a positioning groove for placing the extrusion die and the die support is formed in the die holder. According to the utility model, the problem of unbalanced metal flow when a hot extrusion process is used for producing uniaxial symmetric metal sections is solved, serious bending and uneven wall thickness of a product are avoided, the dimensional accuracy and the performance stability of the product are improved, the die is convenient to replace, a round bar extruded by the balance hole can be used for other purposes, and the production cost is reduced. The utility model is suitable for the production of single-axis symmetric metal profiles.

The utility model discloses a kind of anti-deviation steel strip rolling device, it is related to steel strip rolling technical field.The utility model includes bottom box, the bottom box top side is fixedly connected with rolling frame, the rolling frame inside is fixedly connected with bottom roll, the bottom roll rear side is fixedly connected with drive box, the rolling frame inside is threadedly connected with adjusting lever, the adjusting lever bottom is movably connected with top roll by bearing.The utility model is designed by anti-deviation roller of conical body shape, when steel strip deviates, its inclined plane is contacted with steel strip edge, because the linear velocity gradient of roll surface changes along axial direction and forms asymmetric lateral friction force, restoring force pointing to rolling center is generated, drive steel strip automatic return normality.Anti-deviation roller is driven by second driving motor, keeps same direction rotation, avoids shear stress caused by reverse rotation, reduces steel strip edge scratch, indentation and edge curl risk, significantly improves rolling precision and product quality.

The application provides a racing car suspension structure, which comprises a left stand, a right stand, a left suspension and a right suspension; a connecting assembly is installed at the center of a frame; the left suspension comprises a left upper transverse arm and a left lower transverse arm; the right suspension comprises a right upper transverse arm and a right lower transverse arm; one end of the left upper transverse arm and the left lower transverse arm is rotatably connected with the upper end and the lower end of the left stand respectively; one end of the right upper transverse arm and the right lower transverse arm is rotatably connected with the upper end of the right stand respectively; the other end of the left upper transverse arm and the right upper transverse arm is rotatably connected with the upper end of the connecting assembly respectively; the other end of the left lower transverse arm and the right lower transverse arm is rotatably connected with the lower end of the connecting assembly respectively; the left upper transverse arm and the right upper transverse arm are axially symmetrical relative to the connecting assembly; the left lower transverse arm and the right lower transverse arm are centrally symmetrical relative to the connecting assembly. The application can maximize the utilization of the lateral arrangement space of the vehicle by the length of all the transverse arms, change the wheel track and the positioning parameters of the wheels within the acceptable limited range, and improve the steering stability of the vehicle.

Provided is a knee prosthesis. The knee prosthesis includes: a tibial plateau (10); a femoral condyle component (20) above the tibial plateau (10), wherein the femoral condyle component (20) includes a medial condyle articular surface (21) and a lateral condyle articular surface (22), and there is a height difference H between the medial condyle articular surface (21) and the lateral condyle articular surface (22); and a spacer component (30) between the tibial plateau (10) and the femoral condyle component (20), wherein the spacer component (30) includes a medial spacer (34) cooperating with the medial condyle articular surface (21) and a lateral spacer (35) cooperating with the lateral condyle articular surface (22), an upper surface of the tibial plateau (10) is provided with a first spherical convex surface (11) at a position corresponding to the lateral spacer (35), the lateral spacer (35) is movably arranged on the tibial plateau (10), and a lower surface of the lateral spacer (35) is provided with a first spherical concave surface (31) cooperating with the first spherical convex surface (11). The prosthesis effectively solves the problem that a knee prosthesis is prone to wear in related technologies.

The invention belongs to the technical field of impact testing, and specifically relates to a material bottom pallet balancing device based on a drop hammer impact testing system. The balancing device is arranged between the pallet and the supporting column, and the balancing device includes a plurality of balancing units, and the plurality of balancing units and the pallet are in the same horizontal plane, and the balancing units include: a rolling clamping mechanism, the rolling clamping mechanism is sleeved on the supporting column, and moves along the guide of the supporting column, and is used to drive the plurality of balancing units and the pallet to move along the guide of the supporting column; a connecting rod, one end of the connecting rod is fixed on the rolling clamping mechanism, and the other end is fixed on the pallet, and the connecting rod is linked with the pallet, and is also used to limit the horizontal displacement of the pallet. The balancing device does not need to manually adjust the balance of the pallet, which ensures the balance of the pallet during the test, and completely avoids the possibility of the rod to be tested being subjected to shear stress, thereby greatly improving the accuracy and efficiency of the test.

The present invention belongs to the technical field of underground engineering support, and specifically discloses an underground engineering anchor net coupling energy absorption support system, including: a plurality of butterfly-shaped flexible connection nodes arranged on the support net, the butterfly-shaped flexible connection nodes include a breakable energy absorption structure arranged at the center position, and a plurality of flexible energy absorption connection structures arranged on the periphery of the breakable energy absorption structure; a plurality of ring-shaped nodes arranged on the support net, the ring-shaped nodes are arranged at the tray installation position, the anchor rods or anchor cables pass through the ring-shaped nodes, and are fixed by a rotating coupling energy absorption device; and / or, the ring-shaped nodes are arranged at the overlapping position of two support nets, and the two support nets are connected by an embedded mesh connection device. The various support components of the present invention are coupled with each other and jointly supported to form an underground engineering anchor net coupling energy absorption support system, which can give full play to the energy efficiency of each support component and realize efficient coupling energy absorption support.