6 results about "Stress mode" patented technology

The application discloses a full-assembly building beam-column joint based on a bracket cantilever and belongs to the technical field of assembly building structures. The full-assembly building beam-column joint comprises a prefabricated vertical column, a prefabricated bracket and a prefabricated beam, the prefabricated bracket is arranged on the side wall of the prefabricated vertical column, and the end of the prefabricated beam is supported on the prefabricated bracket; a force transmission mechanism is further arranged, one end of the force transmission mechanism is connected with the end of the prefabricated beam, the other end of the force transmission mechanism penetrates through the prefabricated vertical column and is connected with a dispersion plate opposite to the prefabricated vertical column, and the cantilever stress generated by the prefabricated beam is transmitted and dispersed to the vertical surface opposite to the prefabricated vertical column. The full-assembly building beam-column joint changes the unilateral stress mode of the traditional bracket joint, realizes balanced stress of the full cross section of the vertical column, effectively reduces stress concentration of the joint, and is convenient to assemble, reliable in stress, and strong in integrity.

The utility model belongs to the technical field of automobile parts, in view of the prior art problem, automobile shock absorber and steering knuckle double -screw bolt connection, bolt is axial fastening and circumferential shear resistance, is easy to fail because of vibration, and needs to control four hole tolerance, small space is difficult to assemble, is difficult to satisfy high reliability, high efficiency demand deficiency, provides a kind of shock absorber and steering knuckle mounting structure. The sleeve on the brake with steering knuckle assembly is connected to the lower end of the shock absorber cylinder with helical spring assembly, the side of the positioning sleeve is vertically provided with an open crotch, the open crotch is provided with a mounting bolt on one side and is threaded with a nut on the other side; an interlocking mechanism is arranged between the inner peripheral wall of the positioning sleeve and the outer peripheral wall of the shock absorber cylinder, and the interlocking mechanism is used to bear the circumferential shear force of the shock absorber cylinder in the positioning sleeve. The application breaks the traditional double-bolt "one bolt two use" composite stress mode, realizes the function separation of "circumferential shear resistance" and "axial fastening" through structure optimization, and solves the bolt failure problem from the root.

This invention relates to a method for modeling the stiffness of a variable cross-section robotic arm link in relation to structural dimensions. The method includes the following steps: Step 1: Dividing the robotic arm link into a connecting rod section and front and rear connecting sections; Step 2: Equipping the connecting rod section as an Euler-Bernoulli beam and deriving its stiffness matrix using the principle of virtual work. The connecting rod section model is divided into tension / compression, bending, and torsional stress modes. The stiffness matrix for each stress mode is calculated, and the bending stress mode matrix is ​​corrected before being integrated with other stress mode matrices to obtain the connecting rod section stiffness matrix K2. The parameters in K2 are then correlated with the actual cross-sectional dimensions of the connecting rod section; Step 3: Extracting the stiffness matrices K1 and K3 of the front and rear connecting sections using finite element analysis software; Step 4: Converting and superimposing K1, K2, and K3 to obtain the robotic arm link stiffness matrix; Step 5: Using this method to guide the design of the robotic arm link. The stiffness model established by this invention is accurate and fast in calculation, facilitating dimensional optimization and quickly obtaining design dimensions that meet stiffness requirements.

The present application relates to a kind of processing tooling that can reduce embryo deformation, including a pair of side webs installed at the spindle box of lathe and the rectangular bridge plate of support at the end side of side web, vertical clamping part is equipped at the left side of bridge plate upper wall, end clamping part is equipped at the right side of bridge plate upper wall, vertical clamping part and end clamping part are used to clamp fork arm workpiece, vertical clamping part is used to positively clamp fork arm workpiece.The beneficial effects of the present application are: the processing tooling that can reduce embryo deformation, the end clamping part and fork arm workpiece are multi-point contact clamping, point contact clamping is used between end clamping part and fork arm workpiece, the area of contact is small, so as to reduce the stress area of reference when positioning connection, reduce the problem that product is caused by lateral stress when being pressed and leads to warping, even if the embryo reference of fork arm workpiece exists certain deformation, but using point-to-point stress mode, the influence caused by deformation is greatly compensated.

The application discloses a novel encapsulation system rotary linear pull claw feeding mechanism and a feeding method. The mechanism comprises a rack, and the top of the rack is provided with a storage part comprising a tooth-shaped material box. The inside of the tooth-shaped material box is provided with tooth grooves on both side walls for layer-by-layer stacking of lead frame sides. The lifting and material arranging part is used for adjusting the height of the tooth-shaped material box. By setting the vertical pushing plate linked with the clamping action, the synchronous pushing force is provided at the far end of the frame, and the pulling force of the clamping end is balanced, preventing the middle arching or the far end lagging and twisting of the frame due to uneven stress. By the synchronous composite stress mode of pulling, lifting and pushing, the all-round feeding protection is provided for the ultra-thin frame with weak rigidity, the probability of deformation of the material frame in the transferring process from the material box to the work station is reduced, and thus the success rate of feeding and the yield of the subsequent encapsulation process are significantly improved.