39results about How to "Constant stiffness" patented technology

The invention relates to a hedge trimmer 1, having a blade arrangement 9 with at least one cutter bar (11, 12). The utter bar (11, 12) is driven in a reciprocating manner by the drive motor via the gear mechanism 30 in a longitudinal direction. The blade arrangement includes a guide mechanism (10, 10') that extends over at least a part of the length of the cutter bar (11, 12). The cutter bar (11, 12) is longitudinally movably held on the guide mechanism (10, 10'). The guide mechanism (10, 10') is embodied as a molded part that includes a generally flat fastening portion 76 and a profiled guide portion 77. The cutter bar (11, 12) is supported on the guide portion 77, to achieve a high intensity when the weight is lighter.

The invention relates to an elastomer for a six-dimensional force sensor, and provides a cross-shaped beam type elastomer for the six-dimensional force sensor to solve the problems of low sensibility and large coupling among dimensions of the existing elastomer for the six-dimensional force sensor. Four inner beams and four overload protection beams are uniformly distributed and staggered along an outer wall of an inner ring, four outer beams are arranged on the outer sides of the four inner beams, the four outer beams and the four inner beams are in one-to-one correspondence, the outer beams are fixedly connected with the corresponding inner beams, an outer ring is correspondingly arranged on the outer side of each overload protection beam, one outer beam is arranged between every two adjacent outer rings, and each of the two ends of the outer beam is fixedly connected with one outer ring through a connecting plate, two outer ring through holes are formed in the upper end surface and the lower end surface of each outer ring, eight inner ring through holes are uniformly distributed in the upper end surface and the lower end surface of the inner ring along the same circumference, each inner ring through hole is located between the adjacent outer ring and the outer beam, and an overload protection beam through hole and an outer ring process through hole are communicated with an inner ring process through hole. The cross-shaped beam type elastomer for the six-dimensional force sensor is suitable for industrial automation, automobiles, shipbuilding, military projects or robots.

A medical catheter for inserting into a body includes a bump tubing section with proximal and distal ends, wherein the proximal end is configured to mate with a hub. The bump tubing section has an intermediate portion extending away from the proximal end with a substantially constant outer diameter and thickness, and a taper portion adjacent the distal end with generally decreasing inside and outside diameters to provide a gradually increasing flexibility toward the distal end of the bump tubing section. The bump tubing section is comprised of a polymer having a predetermined flexural modulus. A tip section is disposed distally of the distal end of the bump tubing section comprising a distal liner and a distal cover such that at least a majority of the tip section has a substantially constant stiffness and a flexural modulus substantially equal to or greater than the predetermined flexural modulus.

The invention belongs to the technical field of flexible robots, and provides a permanent magnet variable-stiffness flexible joint for a robot, wherein the permanent magnet variable-stiffness flexiblejoint is capable of simulating nolinear variable-stiffness muscle features of a bionic joint. A permanent magnet variable-stiffness mechanism is adopted as a stiffness adjusting component, a rope isused as force and motion transmission component, the stiffness changes along with change of air gaps between permanent magnets, by means of actions of a motor, a rope winch and a guide pulley, force and position decoupling of ropes at the two sides of a manipulator, so that only joint rotating angle instead of joint stiffness is changed, and namely the joint position is adjusted under the equal-stiffness condition; the effect of just changing joint stiffness instead of the joint position can be achieved, and work under corresponding stiffness condition is achieved according to different working conditions. The permanent magnet variable-stiffness flexible joint for the robot is concise in motion form, convenient to manufacture and easy to operate.

The invention relates to a reinforced grouting casing capable of improving bearing capacity of a steel member in the structural engineering field of fixed constructions. The reinforced grouting casing can be used for improving the bearing capacity of the steel member and repairing damage of the steel member. The structure of the reinforced grouting casing is as follows: a flexible material membrane is directly coated on the deformed part of the steel member; a straight casing is axially sleeved outside the steel member coated with the flexible material membrane; and expansive cement paste is filled between the straight casing and the flexible material membrane. With the adoption of the reinforced grouting casing, the problem that the structural safety and normal usage of the steel member are influenced during the reinforcing construction period in the prior art is overcome. By virtue of the reinforced grouting casing, the bearing capacity of the original steel member is increased without influence to the rigidity of the original member, thus the stress of each member of the original structure cannot be influenced. At the same time, the reinforced grouting casing is low in constructing precision requirement, convenient in constructing and short in construction period.

The invention discloses a flexible grinding and polishing actuator with variable stiffness, which belongs to the technical field of solid wood plate processing. It includes a box body, an active compliance mechanism and a passive compliance mechanism arranged in the box from top to bottom, and a grinding and polishing head mechanism arranged outside the box; an arrangement between the active compliance mechanism and the passive compliance mechanism There is a pressure sensor, and the grinding and polishing head mechanism is connected with the passive compliance mechanism. The invention helps to solve the problems of active and passive separation of common grinding and polishing machines and many disadvantages.

The invention discloses a parallel elastic connecting device used for an engine thrust measurement rack. The parallel elastic connecting device comprises a rigid connecting segment 35, a first spring piece 36, a second spring piece 38, a third spring piece 39 and a fixing bolt 37. The cross section of the rigid connecting segment 35 has a convex symmetrical structure. One end of each of the first spring piece 36, the second spring piece 38 and the third spring piece 39 is fixedly connected with the rigid connecting segment 35. The first spring piece 36 and the third spring piece 39 are connected with the two symmetrical sides of the rigid connecting segment 35. The second spring piece 38 is fixedly connected at the middle convex position of the rigid connecting segment 35. The first spring piece 36 and the third spring piece 39 are symmetrically distributed. When the first spring piece 36 and the third spring piece 39 are connected with a fixed frame 1, the second spring piece 38 is connected with a moving frame 21; and when the first spring piece 36 and the third spring piece 39 are connected with the moving frame 21, the second spring piece 38 is connected with the fixed frame 1, the fixed frame 1 is fixed on the foundation and the moving frame 21 is connected with tested equipment.