4results about How to "Improved stiffness properties" patented technology

A three-branch, six-DOF (degrees of freedom) parallel composite robot includes a carrier body that moves with a planar mobile platform. The carrier body is equipped with a six-DOF attitude adjustment mechanism and an electronic control module. A moving platform module is mounted on top of the six-DOF attitude adjustment mechanism. The six-DOF attitude adjustment mechanism includes three branches, each branch comprising a lateral sliding joint and a vertical sliding joint connected by a cross-slider. The lateral sliding joint is mounted on a first mounting plate and driven by a first lead screw, while the vertical sliding joint is mounted on a second mounting plate and driven by a second lead screw. The second mounting plate is connected to the moving platform module via a ball joint. When the planar mobile platform is locked, the six-DOF attitude adjustment mechanism achieves six-DOF pose adjustment of the moving platform module through the coordinated movement of the lateral and vertical sliding joints of the three branches. This invention features high load capacity, high rigidity, and a large extension ratio, maintaining overall stability while balancing flexibility and workspace.

The application discloses a kind of low-frequency broadband sound-absorbing metamaterial structures and super-constructed sound barriers based on metal foam, and the metamaterial structure includes metal foam layer and composite resonant cavity layer, and the metal foam layer and the composite resonant cavity layer are stacked;Composite resonant cavity layer includes mother cavity structure and sub-cavity structure, and the sub-cavity structure is embedded in the mother cavity structure, and the mother cavity structure and the sub-cavity structure are all provided with openings towards the metal foam layer, so that the incident sound wave can enter the mother cavity structure and the sub-cavity structure after propagating through the metal foam layer;The cavity of mother cavity structure and sub-cavity structure is unidirectional equal-section cavity.The application is applied to the field of acoustic noise reduction, realizes the high-efficiency sound-absorbing performance of low frequency and wide band, has high stiffness and strength and excellent environmental adaptability, can bear, has good environmental tolerance, has excellent fireproof performance, is suitable for various complex and severe environments, ensures long-term stable working state, is convenient for low-cost mass production, and improves economic feasibility.

The utility model provides a kind of double range multi-dimensional force sensor, including the measurement module with common central axis, force range-increasing elastic plate and moment range-increasing elastic plate, and it is provided with circumferential gap and axial gap between measurement module, force range-increasing elastic plate and moment range-increasing elastic plate, to realize the overload protection of force at the central axis of elastomer;When the size of circumferential gap and axial gap is all greater than zero, multi-dimensional force sensor is at first range, when the size of circumferential gap and axial gap exists zero, the force / torque measurement of zero gap corresponding direction of multi-dimensional force sensor is at second range.The utility model provides by increasing range-increasing device, forms new multi-dimensional force sensor, so that it has high sensitivity, low stiffness low range and low sensitivity, high stiffness high range, effectively increases the stiffness of sensor, its structure is simple, overload protection effect is good, no coupling and no influence to measurement accuracy, to solve the problem of influence to force sensor measurement accuracy.

A three-branch-chain six-degree-of-freedom moving parallel composite robot comprises a bearing vehicle body moving along with a plane moving platform, a six-degree-of-freedom posture adjusting mechanism and an electric control module are installed on the bearing vehicle body, and a moving platform module is arranged at the top of the six-degree-of-freedom posture adjusting mechanism. The six-degree-of-freedom posture adjusting mechanism comprises three branch chains, each branch chain comprises a transverse moving pair and a vertical moving pair which are connected through a cross-shaped sliding block, the transverse moving pair is arranged on the first mounting plate and driven by a first lead screw, and the vertical moving pair is arranged on the second mounting plate and driven by a second lead screw; the second mounting plate is connected with the movable platform module through a spherical hinge pair; when the plane moving platform is in a locking state, the six-degree-of-freedom posture adjusting mechanism achieves six-degree-of-freedom posture adjustment of the moving platform module through cooperative movement of the transverse moving pairs and the vertical moving pairs of the three branch chains. The whole robot has the advantages of being high in load capacity, high in rigidity and large in telescopic ratio, and the flexibility and the operation space are both considered while the stability of the whole robot is kept.