35results about How to "With variable stiffness" patented technology

The invention relates to a tester capable of carrying out large-sized fully graded concrete axial-tension tests. The tester mainly comprises such members as an upper frame beam (1), a lower frame beam (5), two uprights (4), a main steel beam (2), two magnetorheological dampers (8), two damper dowel bars (3), an upper bearing rod (41), a middle bearing rod (42), a lower bearing rod (6), an upper concrete test piece connecting steel plate (9), a lower concrete test piece connecting steel plate (10), a spherical hinge (11), a hydraulic actuator (19) and the like. During a test, real-time variation of the rigidity of the tester is realized by adjusting the magnitude of the force output of each magnetorheological damper in real time, so that the resilience of a test system caused by load drop at the descending segment of a concrete tensile curve can be restrained, thereby guaranteeing stable fracture of the test piece; such an axial-tension tester capable of carrying out axial tension stress-deformation overall tests of the large-sized fully graded concrete overcomes the problems of insufficient rigidity and uncontrollable elastic energy release process that a common tester and a changed tester with parallel-connected rigid elements may have.

A double-headed arrow type negative poisson ratio structural body relates to the structural body field of space lattice structures, and includes a double-headed arrow type negative poisson ratio structural unit, wherein the double-headed arrow type negative poisson ratio structural unit includes an upper cross beam, a lower cross beam, a first upper diagonal bar, a second upper diagonal bar, a first lower diagonal bar, a second lower diagonal bar, a first middle diagonal bar and a second middle diagonal bar; a first upper connecting base, a second upper connecting base, a first lower connecting base and a second lower connecting base are respectively arranged at the lower ends of the first upper diagonal bar, the second upper diagonal bar, the first lower diagonal bar and the second lowerdiagonal bar, so as to form the double-headed arrow type negative poisson ratio structural unit; in space, the double-headed arrow type negative poisson ratio structural unit adopt the first upper connecting base, the second upper connecting base, the first lower connecting base, the second lower connecting base, the upper cross beam and the lower cross beam as connecting pieces for combined connection to form the double-headed arrow type negative poisson ratio structural body with the stereostructure. The double-headed arrow type negative poisson ratio structural body has the advantages of simple structure, high stability, light weight in unit space, high compression resistance, high impact resistance, and the like.

The invention discloses an oil-pneumatic spring rear suspension system for mining vehicles, which includes a vehicle frame and a suspension mechanism installed on the vehicle axle. The suspension mechanism is installed on the vehicle frame. The suspension mechanism includes four oil-pneumatic springs and two high and low pressure springs Accumulator and a set of guide mechanism; four oil-pneumatic springs are respectively arranged at the two ends of the lower middle and rear axles. Vertical load, the oil and gas springs on the middle and rear axles are interconnected through oil pipes to realize the function of balanced suspension; the guide mechanism is installed inside the frame, and the invention solves the problem of poor carrying capacity and poor comfort of the vehicle in the prior art, and the vehicle Technical problems with short service life.

The invention relates to a rubber spring bumper seat which can be used in vehicle, comprising: a headrest (1), a backrest (2), a regulating knob (3), and an upper connection soleplate (5) of cushion (4). Wherein, the headrest (1) is connected to the upper part of backrest (2) whose lower part is connected to the upper connection soleplate (5) via the regulating knob (3); the cushion (4) is on the upper connection soleplate (5) under which a guide pole (9) is mounted; the upper end of guide pole (9) is mounted under the upper connection soleplate (5) via the clamp nut (10); the guide muffle (8) is mounted on the lower connection soleplate (7); the lower part of guide pole (9) inside the guide muffle (8) can slide freely; the rubber spring (6) is sheath outer the guide pole 99) while its upper end is connected to the upper connection soleplate (5) and its lower end is connected to the lower connection soleplate (7).

The invention relates to a variable-stiffness leaf spring cross-type balance suspension. The variable-stiffness balance suspension comprises a front axle, a rear axle, a front leaf spring, a rear leaf spring, a vehicle frame, a shock absorber, a U-bolt, and a front spring hanger. The lug, the balance arm bracket and the rear spring lifting lug are characterized in that: it also includes a composite leaf spring type balance arm, and the composite leaf spring type balance arm includes a main plate spring, an auxiliary leaf spring and a leaf spring clip; the auxiliary plate The spring is arranged above the main spring through a leaf spring clip; the leaf spring clip is hinged with the balance arm bracket. The invention is used on multi-axle vehicles, and can reduce the eccentric wear of tires while reducing the wheelbase as much as possible, make the frame more evenly stressed, and reduce the self-weight. The flexibility of the design is improved, and the ride comfort of the vehicle under different loads is improved.