43results about How to "Uniform reaction force" patented technology

A ball valve having reduced torque requirements for rotation is presented. Torque reduction is realized by providing a shaped sealing back member to provide a back force behind essentially the entire sealing surface of the downstream seal. Torque reduction is also realized by providing a dynamic sealing configuration that varies the sealing force over the valve's operating pressure conditions. An initial bias sealing force is applied by a spring member which also provides a low uniform as-assembled valve torque. As fluid pressure increases, the sealing pressure also increases as an o-ring is forced along a ramped surface of the seal. As inlet pressure decreases, the o-ring is allowed to back down the ramped surface to reduce the sealing force against the valve member. This sealing configuration allows for reverse flow or improper installation of the ball valve, and bottoms out to maintain a sealing force at higher back pressure conditions.

The invention discloses a hydraulic precision leveling machine which comprises an upper roller group, a lower roller group, a load bearing beam, a machine base and four upright posts, wherein the upper roller group and the lower roller group are respectively and fixedly provided with power decelerating devices, the load bearing beam is composed of an upper beam and a lower beam which is fixedly arranged on the machine base, the upper roller group is fixedly connected with the upper beam, the lower roller group is fixedly connected with the lower beam, the four upright posts are respectively and fixedly sheathed on four corners of the lower beam, and the upper beam can be movably sheathed on the four upright posts. Both the upper roller group and the lower roller group comprise a plurality of leveling rollers, wall plates, a plurality of support brackets, a plurality of fixing shafts and a plurality of support jockey pulleys, wherein the leveling rollers are arranged side by side and can be rotatablely supported on the wall plates on both sides, the fixing shafts are supported on the support brackets, and the support jockey pulleys can be rotatablely sheathed on the corresponding fixing shaft. The hydraulic precision leveling machine has the advantages of high leveling precision, simple structure and low manufacturing cost, and leveling requirements for plates with different thicknesses can be satisfied.

The invention discloses a foldable staggered elastic-plate hemostatic structure with pull cords and a hemostatic device and method. The foldable staggered elastic-plate hemostatic structure comprisesa hemostatic material dressing film and adaptive elastic-plate extension structures. Each adaptive elastic-plate extension structure includes elastic plates, a support rod and a pull cord; the elasticplates are fixed to the support rod; two elastic plates form one layer; the layers of elastic plates are arranged according to a certain angle difference theta, with Pi / 3< / =theta< / =Pi / 2; geometric linearity of the elastic plates is of involutes, and base radius of each involute is R. The hemostatic material dressing film is attached to the outer sides of the elastic plates; the support rods are composed of a scissors hinge unit and an elastic element. Upon using, the foldable staggered elastic-plate hemostatic structure is injected into a wound; the pull cords are released, and the elastic elements release elastic potential energy to drive the support rods to axially extend; the elastic plates release elastic potential energy and extend radially, the hemostatic material dressing film is driven to attach to the wound, and a quick hemostatic function is achieved.

The invention relates to a damping device (10), in particular for a linearly movably arranged element (2, 102), having a storage space (25) for receiving a damping medium (26), wherein the damping medium (26) is designed, at least indirectly, with the Element (2, 102) cooperate to reduce its displacement energy at a displacement of the damping medium (26).

The invention discloses a swing type metal plate shearing machine for electric retractable door production. The swing type metal plate shearing machine comprises two transporting parts, a support, a rotating shaft, a driving mechanism and two shearing units, wherein the two transporting parts are arranged side by side, each transporting part comprises two transporting mechanisms and a supporting table, the two transporting mechanisms are arranged symmetrically about the supporting table, an accommodating groove is formed in the supporting table, and the length direction of the accommodating groove is parallel to the transporting directions of the transporting mechanisms; the rotating shaft is mounted on the support in a rotating manner, the rotating shaft is arranged above the transporting parts, and the axis of the rotating shaft is vertical to the transporting directions of the transporting mechanisms; the driving mechanism is used for driving the rotating shaft to rotate. The swing type metal plate shearing machine is simple in structure and convenient to use.

The invention discloses a metal plate cutting device for retractable door production. The device comprises a support rod, a driving gear, a first power unit, two conveying mechanisms and a driving mechanism; the support rod is arranged in the vertical direction; the driving gear is mounted on the support rod, and the axis of the driving gear is overlapped with the axis of the support rod; the first power unit drives the driving gear to rotate; the two conveying mechanisms are distributed on two sides of the driving gear; the conveying mechanisms include support tables, cutters, support frames, lead screws and two moving plates; accommodating tanks are formed in the support tables; first ends of the cutters are hinged to the accommodating tanks; projections of the cutters on the support tables are positioned in the accommodating tanks; the driving mechanism drives the cutters to enter or deviate from the accommodating tanks; and the cutting directions of the cutters in the two conveying mechanisms are opposite. The device is simple in structure and convenient for use.

The invention discloses a metal workpiece machining device in the technical field of metal workpiece machining. The metal workpiece machining device comprises a translation conveying mechanism for urging pipe fittings to perform translation in the axis direction. The metal workpiece machining device further comprises a foundation base. The metal workpiece machining device further comprises a mainslide base horizontally mounted on the foundation base in a sliding manner, wherein the sliding direction is adapted to the translation direction of the pipe fittings. The metal workpiece machining device further comprises a first-grade driving oil cylinder for urging the main slide base to slide. The metal workpiece machining device further comprises a PLC; a reference plane is arranged on the foundation base; the height position of the reference plane is adapted to the heights of the bottoms of the inner peripheral walls of the pipe fittings; an annular cutting actuation mechanism for cutting off the pipe fittings and extending in the radial directions of the pipe fittings is mounted at the outer periphery of an annular cutting driving shaft, and is positioned between a front support frame and a main-grade extension base; and the front support frame is provided with multiple distance measurers which are uniformly distributed in the peripheral direction with the axis of the annular cutting driving shaft as reference. The metal workpiece machining device can guarantee the cutting size precision of the pipe fittings, and is convenient to operate.

The invention belongs to the field of digging and relates to a method for buffering a reciprocating impact tunneling counter-acting force and a buffering heading machine adopting the method. The buffering heading machine comprises a machine body, a travel unit, a reciprocating impact unit, and a buffering unit. The buffering unit comprises a dynamic buffering device or a structure buffering guiding device. The reciprocating impact unit comprises an impact driving device, a fixing support and a buffering support. The dynamic buffering device comprises a rotary dynamic buffering device. The rotary dynamic buffering device comprises a slide stroke splined hub buffering device or a belt buffering device. The structure buffering guiding device is arranged between the reciprocating impact unit and the machine body or between the fixing support and the buffering support. The structure buffering guiding device can guide a buffering direction of the dynamic buffering device and / or a structure buffering device. The buffering unit can buffer and resolve a counter-acting force on the reciprocating impact unit. The reciprocating impact unit is arranged at the machine body. The travel unit drives the machine body to travel.

The invention relates to the technical field of jack related equipment, and discloses vertical jack top extension supporting equipment and a supporting method. The vertical jack top extension supporting equipment comprises a barrel, the outer side wall of the cross section of the barrel is square, the cross section of the inner side wall of the barrel is circular, the barrel is free of a base, thetop of the barrel is fixedly connected with a circular supporting disc through a locking screw, a round soft rubber block is bonded to the top of the inner side of the barrel, arc-shaped containing grooves are formed in the inner walls of the left side and the right side of the barrel, two movable through holes are formed in each of the left side face and the right side face of the barrel, movable reinforcing rings are welded to the movable through holes in the left side face and the right side face of the barrel, polish rods penetrate through the inner sides of the four reinforcing rings, and the four polish rods correspondingly penetrate through the inner sides of the corresponding movable through holes and extend to the inner sides of the corresponding arc-shaped containing grooves. According to the vertical jack top extension supporting equipment, it is guaranteed that the top of a jack is evenly clamped and stressed, and therefore the top of the jack is well fixed.

Provided is a structure for a vehicle body front (1) in which a bumper net (3) formed of a resin is provided on the vehicle body front side of an apron side member (2) having flat parts above and below a front end part, without a bumper member being provided on the vehicle body front side of the apron side member (2). Block parts (6), and ribs (7) extending in the vehicle body vertical direction, are provided on the left and right sides of the bumper net (3). The left and right ends of the bumper net (3) are disposed overlapping the apron side member (2) when viewed from the front. An attachment part (8) of the bumper net (3) for attachment to the apron side member (2) overlaps with the flat parts (5) of the apron side member (2) when viewed from the front. The ribs (7) are disposed overlapping the flat parts (5) of the apron side member (2) when viewed from the front, and the block parts (6) and the ribs (7) are connected to each other. The attachment part (8) can be deformed by a load from the vehicle body front side.

The invention relates to the technical field of jack-related equipment, and discloses an upright type jack top extension supporting device. The upright type jack top extension supporting device comprises a cylinder body, the cross section of the outer side wall of the cylinder body is square, the cross section of the inner side wall of the cylinder body is round, the cylinder body is not providedwith a base, the top of the cylinder body is fixedly connected with a round supporting disc through locking screws, a round soft rubber block is adhered to the top of the inner side of the cylinder body, arc-shaped placement grooves are formed in the inner walls of the left side and the right side of the cylinder body, two movable through holes are formed in each of the left side face and the right side face of the cylinder body, movable reinforcing rings are welded at the movable through holes in the left side face and the right side face of the cylinder body, polished rods are arranged on the inner sides of the four reinforcing rings in a penetrating and inserting mode, and the four polished rods penetrate through the inner sides of the corresponding movable through holes correspondinglyand extend to the inner sides of the corresponding arc-shaped placement grooves. According to the upright type jack top extension supporting device, the uniformity of clamping stress on the top of ajack is guaranteed, so that the top of the jack is well fixed.