55results about How to "Concentrated force" patented technology

An adaptive cushion apparatus for minimizing force concentrations on body parts of a person seated or lying on a chair or bed includes an overlay cushion having a plurality of individual air bladder cells, each having thereon a stretchable piezoresistive force sensor of novel design and construction. The apparatus includes an electro-pneumatic control system for inflating and deflating individual air bladder cells to pressures measured by a pressure transducer which tend to minimize force concentrations sensed by the force sensors. A force minimization method according to the invention includes varying the inflation pressure in a first air bladder cell while measuring the sum of the forces exerted on all air bladder cells, repressurizing the first cell to that pressure for which a minimum total force was obtained, repeating the cyclical variation in pressure and re-inflation to a minimum force-obtaining pressure for each of the remaining air bladder cells, and repeating the sequence for all air bladder cells until the force variations are minimized below a predetermined threshold value.

The invention discloses a fiber grating earth pressure sensor which comprises a sensor shell, a pressure transmission component and a fiber grating. The earth pressure sensor is characterized in that the pressure transmission component is of a rhombus structure, and the is positioned between a bearing-type top cover and a bottom plate, and is in contact with the bearing-type top cover and the bottom plate; clearances are arranged among the pressure transmission component and the left side and the right side of the sensor shell; a grating is pasted on a metal elastic membrane; the metal elastic membrane is arranged on a transverse diagonal line between a left angle and a right angle of the pressure transmission component; and two sides of the metal elastic membrane are fixed on the left angle and the right angle of the pressure transmission component. The earth pressure sensor provided by the invention has the characteristics of large measuring span, high accuracy and simple structure, is good for miniaturization of the integral structure.

The action and barrel of a firearm are in direct contact with a high modulus of elasticity holder that receives the vibrations of recoil directly and distributes the vibrations over a wide area. The high modulus of elasticity holder, which may be made of a metal such as aluminum, transfers the forces to the wooden portion of a wooden gunstock over a wide area greater than 12 square inches so that there are substantially no concentrated stresses placed upon the wood.

The invention relates to a connecting structure capable of being rapidly mounted and dismounted. The connecting structure comprises a locking pin and a locking block. The locking pin comprises a pin shaft and a pin shaft sleeve arranged on the lower portion of the pin shaft in a sleeving mode through threads. The bottom surface of the pin shaft is a conical surface. The lower portion, under the pin shaft, of the pin shaft sleeve is provided with a plurality of through holes evenly distributed around the axis, and a steel ball which can freely move but can not fall out is arranged in each through hole. The locking block is provided with a connecting hole and a containing cavity, the connecting hole is formed in the top surface of the locking block, and the bottom of the connecting hole is communicated with the top of the containing cavity, and the top surface of the containing cavity is a conical surface. In the installation process, the pin shaft sleeve and the locking block are fixed to a connector and a connected part respectively, the pin shaft sleeve penetrates through the connector and enters the containing cavity of the locking block through the connecting hole, the pin shaft is rotated downwards so that the steel balls can be pushed to squeeze the conical top surface of the containing cavity through the conical bottom surface of the pin shaft, and the connector and the connected part squeeze and fix each other when subjected to force in opposite directions. In the dismounting process, the pin shaft is rotated upwards, the steel balls are not subjected to force, and then the connector and the connected part are separated.

The invention discloses a hinge damping buffer structure which comprises a connection arm, a hinge cup seat, a transmission arm assembly and an elastic assembly, wherein two ends of the transmission arm assembly are respectively connected with the connection arm and the hinge cup seat in a rotatable manner; the elastic assembly is arranged on the transmission arm assembly; the connection arm is hinged with the hinge cup seat through matching between the transmission arm assembly and the elastic assembly, to realize opening and closing of a hinge. The hinge damping buffer structure is characterized in that a damper is arranged on the connection arm in a sliding manner; the transmission arm assembly is hinged with a pushing element; a zigzag region is arranged on the pushing element and at least acts on one end of the damper when the hinge closes a travel; the damper slides on the connection arm and is compressed to generate damping buffer force; the zigzag region is at least separated from one end of the damper when the hinge opens a travel; the damper slides on the connection arm and is reset to the initial position. The hinge damping buffer structure has the characteristics of simple and reasonable structure, excellent performance, quickness in assembling, long service life, low manufacturing cost, easiness in production and implementation, safety and reliability, and is high in practicability.

The invention discloses a mold locking mechanism of a plastic injection molding machine, comprising a base, a thrust seat, a moving mold plate and a fixed mold plate which are arranged in sequence, wherein the centers of the base, the thrust seat, the moving mold plate and the fixed mold plate are positioned on the same central axis; a guide rod is fixedly arranged on the base; the thrust seat and the moving mold plate are sheathed on the guide rod; the fixed mold plate is fixedly connected with the end part of the guide rod; and a connecting rod group is arranged between the moving mold plate and the base. The mold locking mechanism is characterized in that the thrust seat is internally and fixedly provided with at least one oil cylinder; and a piston rod of the oil cylinder is fixedly connected with the moving mold plate. The mold locking mechanism has the advantages that the length of the whole mold locking mechanism is reduced, the structure of the whole mechanism becomes compact, and the whole volume is reduced; and when the moving mold plate and the fixed mold plate are positioned in a locking state, the included angle of the center connecting line of a first connecting rod and a second connecting rod and the horizontal surface of the central axis is more than 0 degree but less than or equal to 10 degrees. In the structure, the acting force of the mold locking mechanism on the mold tends to the center of the mold, the stressing of the mold is more concentrated, and the qualification rate of plastic products is effectively improved.

The invention discloses an oral cavity supporting device of an adjustable tongue retaining plate and relate to a dental auxiliary medical apparatus. The oral cavity supporting device has the functionsof distracting the oral cavity and preventing disturbance of the tongue. The oral cavity supporting device comprises an oral cavity supporting device body, the adjustable tongue retaining plate, a fixed length tongue retaining plate and a bidirectional lead screw, wherein when the oral cavity supporting device body is placed on one side of the oral cavity, the adjustable tongue retaining plate isconnected to the oral cavity supporting device body and a height adjusting rotary knob is connected to the middle of the bidirectional lead screw to adjust the height of the oral cavity supporting device body; a positioning rod is used for fixing corresponding positions of upper and lower parts of the oral cavity supporting device when the longitudinal height is adjusted. The oral cavity supporting device is I-shaped, the engaging part is of a concave arc shape, and the stress of the I-shaped structure is more centralized during engagement; the adjustable tongue retaining plate is of an embedded telescopic structure and a tongue retaining plate body is inserted into a tongue retaining sleeve to form the tongue retaining plate. The depth, inserted into the tongue retaining plate sleeve, ofthe tongue retaining plate is adjusted through three length adjusting holes. Balls on a V-shaped positioning elastic sheet are sunken into the three length adjusting holes to adjust and fix the stretching length of the tongue retaining plate body.

A joint stabilizing apparatus having an expandable cylindrical housing is inserted into a circular hole drilled at a “loose joint” of a concrete slab that is to be stabilized against relative vertical displacement between adjacent slab sections. The hole is drilled downward into the concrete, centered on the plane of a lateral opening/joint in the concrete slab. The expandable housing comprises two rigid semi-circular housing halves, and the assembly is oriented inside of the circular hole such that the two housing halves are on opposite sides of the centerline of the lateral opening/joint. The housing halves are pushed apart by turning of a threaded bolt inside of the housing. Turning of the bolt causes two bi-laterally symmetric wedge blocks to draw towards each other, and pressing the bearing surfaces of the wedge blocks against inclined surfaces inside of the respective housing halves. As the housing halves are pushed apart, the outside surfaces of the expandable housing engage the walls of the drilled hole and apply opposing horizontal compressive forces to the slab sections. Friction between the expandable housing and the concrete slab sections prevent the slab sections from vertically moving relative to each other. In other embodiments of the invention, the joint stabilizing apparatus is used to prevent relative motion between non-horizontal construction members, and between four adjacent slab sections separated by intersecting loose joints.

The invention provides an adjustable trailer device and belongs to the technical field of motor vehicle accessories. The adjustable trailer device solves the technical problems that in an existing trailer arm, trailer balls are prone to being broken and the trailer arm is prone to being damaged. According to the technical scheme, the adjustable trailer device comprises a main arm, an adjusting ram and a trailer ball assembly, wherein the main arm is fixedly connected with a motor vehicle; the adjusting arm is vertically and fixedly connected with the end of the main arm; the trailer ball assembly is used for being connected with another motor vehicle; the trailer ball assembly makes contact with the adjusting arm and can vertically move on the adjusting arm, and when the trailer ball assembly moves to the designated position, the trailer ball assembly can be fixed to the adjusting arm. The adjustable trailer device has the beneficial effects that the trailer ball assembly is movably connected with the main arm, so that the situation that the trailer ball assembly is broken is avoided, the trailer ball assembly is longer in service life and can be fixed to positions, with different heights, of the adjusting arm, the stress of the trailer ball assembly is more concentrated, the loss of force is less, and the damage rate of the main arm is smaller.

The invention discloses a hanger for a steel structural member with a hole, which comprises lifting lugs, a first hanging plate, a second hanging plate, a movable tongue and a pushing device. The middle part of the movable tongue is rotatably mounted on the first The lower section of the suspension plate and the second suspension plate, the hinge shaft divides the movable tongue plate into a long plate section and a short plate section, the thrust device includes a push plate and a handle, and the lower end of the push plate corresponds to the short plate section of the movable tongue plate Cooperate, the long plate section is provided with a hanging groove, the first hanging plate and the second hanging plate are provided with a hanging pin, the lower end of the push plate pushes the short plate section to rotate the movable tongue plate so that the hanging groove is hooked on the hanging pin , when the hanging groove is separated from the hanging pin, the upper side edge of the movable tongue plate is the hanging edge in contact with the steel structural member. The lifting tool can be inserted into the hole to lift the steel structural member with the hole, so that the lifting point can be reasonably selected, the force of the member is more reasonable during hoisting, and the safety is higher.

The invention provides a special crankshaft multi-bend reversing machine. A hydraulic machine is fixedly installed on a single rectangular machine body vertical support, a sliding block with an upper die part is driven through a main hydraulic cylinder in a driving mode, the sliding block is in sliding fit to stand column longitudinal sliding rails on the two sides of the machine body vertical support in a sliding mode, a lower die part is installed on a lower support, a fixed die frame and a rotary die disc which correspond to each other in an up-and-down mode are assembled in the upper die part and the lower die part, a twisting arm is pivoted between stand columns on the two sides, and a pivoting center is coaxial with the rotary die disc. According to the technical scheme, a conventional three-beam four-column main machine structure is removed, device occupied space and land occupied areas are greatly reduced, operation space is accordingly released to the maximum degree, it is important that the twisting structure has the advantages that the power is high, and the maximum twisting corner is large in scope, the twisting quality and the twisting effect are guaranteed, and the machining efficiency is improved.

The invention relates to the technical field of cigarette auxiliary machinery, in particular to a cut tobacco box cleaning device. The device comprises a driving box, a motor is arranged at the bottom of the driving box, and an output shaft of the motor penetrates through the bottom wall of the driving box to be connected with a driving chain wheel. A plurality of brush assemblies are arranged at the upper portion of the driving box and evenly distributed in the circumferential direction of the driving box. Each brush assembly comprises a rotating shaft, wherein the top of the rotating shaft is connected with a guide groove, a cleaning brush is arranged in the guide groove, and the cleaning brush is higher than the guide groove; and the bottoms of the rotating shafts penetrate through the top wall of the driving box to be connected with driven chain wheels, the driving chain wheel is connected with one driven chain wheel through a driving chain, and the driven chain wheels are sequentially connected through driven chains. According to the device, a cut tobacco box can be automatically cleaned, the cleaning efficiency is improved, and the manual cleaning cost is reduced.

A wired rubber contact including a lower film, an upper film, a plurality of conductive wires, a rubber layer, and a film guide. The lower film includes a plurality of lower electrode parts formed in openings. A periphery of the upper film is disposed within an interface between the central area and the peripheral area. The conductive wires are disposed between the lower film and the upper film, and connect between the lower electrode parts and the upper electrode parts. The rubber layer includes elastic material. A periphery of the rubber layer is protruded toward an outer side from the periphery of the upper film. The rubber layer maintains a constant distance between the lower film and the upper film. The film guide is disposed in the peripheral area of the lower film along a side surface of the rubber layer and integrally formed with the lower film.

The invention discloses a connecting structure and method for an externally-hung wallboard and a precast beam, and relates to the technical field of assembling construction of the externally-hung wallboard. The connecting structure comprises the externally-hung wallboard, the precast beam, L-shaped anchor plates A, L-shaped anchor plates B and a plurality of connecting pieces, wherein a mounting groove is formed in the connecting position of the externally-hung wallboard, the precast beam is horizontally arranged, and a step shaped like a Chinese character 'tu (convex)' is arranged at one end of the precast beam; the two sets of L-shaped anchor plates A are arranged at the upper inner right-angle position and the lower inner right-angle position of the mounting groove correspondingly, and the two sets of L-shaped anchor plates B are arranged at the upper step position and the lower step position of one end of the precast beam correspondingly; and the plurality of connecting pieces are connected between the L-shaped anchor plates A at the upper position and the lower position and the corresponding L-shaped anchor plates B. According to the connecting method, construction is conducted in sequence according to the structure. The connecting structure and method for the externally-hung wallboard and the precast beam have the advantages that stress of the step positions in the connecting structure for the externally-hung wallboard and the precast beam is greatly reduced, stability is improved, on-site mounting is rapid and convenient, and environmental friendliness and economy are achieved.

The invention provides an auxiliary opening mechanism for a flue check valve, and belongs to the technical field of pipeline structures. The auxiliary opening mechanism solves the problem that valve plates cannot be opened after long-term use in the prior art. The auxiliary opening mechanism for the flue check valve comprises a shell and a plurality of valve plates; an annular sealing baffle edgeis arranged in the shell; the valve plates are hinged in the shell; the edges of the valve plates can be attached to or can be separated from the annular sealing baffle edge; and the shell is providedwith an air inlet end and an air outlet end. The auxiliary opening mechanism is characterized by comprising swing rods; an installation cavity is formed in each valve plate; the swing rods are arranged in the installation cavities in a swinging mode; openings I and openings II are formed in the sides, close to the air inlet end, of the valve plates; an elastic pad is arranged on each opening I; one ends of the swing rods make contact with the elastic pads; the openings II are formed in the edges of the valve plates; and when the elastic pads deform to drive one ends of the swing rods to swing, the other ends of the swing rods can penetrate out of the openings II to abut against the annular sealing baffle edge. The auxiliary opening mechanism has the advantage of enhancing the opening force of the valve plates.

This invention relates to a wearable adaptative multi-use utility sleeve that enables quick, convenient, and tenacious securement of the multi-use utility sleeve to a person's appendage or torso while also allowing for the swift and convenient attachment and detachment of one or more handheld items to the utility sleeve. The present invention offers several embodiments, each of which utilize a plurality of bistable ribbons, that allow for a one-size-fits-all design that provides the ability to conform to the user's body.