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 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 specifically relates to a method for retaining vertical impact of an impacting mechanism and a vertical-lift impact-cutting digger implementing the method, belonging to the field of machinery, especially to the field of mining. The digger comprises a body, the impacting mechanism and a vertical lift mechanism, wherein the impacting mechanism comprises a guiding member and an impacting head, the vertical lift mechanism comprises a vertical lift driving unit, a lifting and moving part, a supporting seat and the like, the lifting and moving part is movably connected with the supporting seat, the supporting seat is connected with the body, the impacting mechanism is arranged on the lifting and moving part, the vertical lift driving unit drives the lifting and moving part to vertically move up and down, and the lifting and moving part drives the impacting mechanism to vertically rise and fall. The digger provided by the invention has the advantages of a long service life, a small amount of maintenance, high work efficiency, shortened body length and applicability to a complex usage occasion.

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 machinery field and especially relates to a punch-cutting mining method suitable for the mining field and a punch-cutting mining machine implementing the method. According to the method, a machine body, a walking part, a reciprocating impact part and the like are arranged; a lifting device is arranged or not arranged on the machine body; a dynamic impacting member is disposed on an impact driving device; a guiding device is provided with an impact guiding element; two ends of the impact guiding element are both equipped with an impactor or one end is provided with an impactor and the other end is provided with a counterweight; and the machine body supports the impactor to shock dropping materials back and forth. The equipment comprises the machine body, the walking part, the reciprocating impact part and the like. The reciprocating impact part comprises the dynamic impacting member, the impact driving device, the impactor and the like. The impact driving device comprises the dynamic impacting member. The guiding device comprises the impact guiding element; the dynamic impacting member drives the impactor to shock the coal wall or rock faces for blanking materials; the lifting device is arranged or not arranged on the machine body; the walking part is disposed on the lower part of the machine body and drives the machine body to walk so as to blank materials during walking and walk back to blank materials without turning the machine body.

The invention discloses a machining device for retractable door production. The machining device comprises N first rotating shafts, (N+1) second rotating shafts, connecting parts, supports, a driving unit and (N-1) conveying mechanisms, wherein N is a positive integer greater than 1; the N first rotating shafts are sequentially arranged, and distributed with the (N+1) second rotating shafts at intervals; two first rotating shafts distributed at the two ends are rotationally connected with the supports; the two ends of the second rotating shafts are connected with the adjacent first rotating shafts through the connecting parts; the axes of the second rotating shafts are parallel to those of the first rotating shafts; the axes of any two adjacent second rotating shafts are parallel to each other; and the (N-1) conveying mechanisms are all arranged below the second rotating shafts, and arranged with the (N+1) second rotating shafts in a one-to-one correspondence manner. The machining device provided by the invention is simple in structure and good in machining effect.

The invention discloses an automatic green brick stacking machine of a brick kiln. The machine is characterized in that a telescoping frame is connected to the bottom part of a chuck, wherein a clamp is fixed to the inner wall of the telescoping frame; a cylinder is fixed to the telescoping frame; a clamping plate passes through a telescoping rod; the cylinder communicates with an air storing tank through an air distributing tube; the air distributing tube is connected with an air pressure regulator; a base on which a gyring support is arranged is connected to the top part of the chuck; a pressing plate on which a speed reducer is arranged is rotatably connected to the gyring support; a connecting gear is connected to an output shaft of the speed reducer; a spring column is arranged between the pressing plate and the gyring support; the pressing plate is connected with a lifting device; a moving device comprises a first frame plate, a second frame plate and a tension spring column; a driving wheel which is driven through a servo motor is arranged on the first frame plate; a driven wheel is arranged on the second frame plate. With the adoption of the machine, each green brick can be successfully clamped; the chuck can self-adaptively adjust the inertia force during rotating; when pausing, the moving device can self-adaptively buffer the inertia impacting force, so that the stability of the green brick in moving can be improved, and as a result, the green brick stacking efficiency can be improved.

The invention provides a novel ground mat for training and competition of cheerleading. The novel ground mat for training and competition of cheerleading is characterized in that the novel ground mat comprises a first ground mat (1), a second ground mat (2) and a third ground mat (3), which are arranged in a vertically overlapped manner; a first glass fiber net (4) is arranged between the first ground mat (1) and the second ground mat (2); and a second glass fiber net (5) is further arranged between the second ground mat (2) and the third ground mat (3). The novel ground mat is simple in structure, convenient in application and environmentally friendly without any pollution. Therefore, the mat can support collective jumping, rotation, extension of cheerleading members. Technical performance and movement quality of members are effectively improved. Therefore, possible motion damage is avoidedto the maximal extent by overcoming thedesign defect of material of the ground mat.

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 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 relates to the technical field of wireless inclinometers while drilling, and particularly discloses an anti-interference pulse generator driving head. The anti-interference pulse generator driving head comprises a mushroom head and a flow limiting ring, the mushroom head is connected with the flow limiting ring in a sliding fit mode, one end of the mushroom head is of a first conicalstructure, a second conical structure is arranged on the flow limiting ring, the first conical structure is matched with the second conical structure, and the first conical structure and the second conical structure are both conical. According to the anti-interference pulse generator driving head, by arranging the mushroom head and the flow limiting ring structure, the waveform intensity is adjustable, the anti-attenuation and anti-interference capabilities of the transmitted signal are stronger, the pressure change is more uniform, the signal is more anti-interference, and later decoding ismore facilitated.

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 discloses a levelling roller structure for a levelling machine. The levelling roller structure for the levelling machine comprises a bottom plate, a plurality of supporting wheels and a plurality of levelling rollers which are arranged side by side; a wall plate is fixed to each of the two sides of the bottom plate; the levelling rollers are rotatably supported on the two wall plates; each levelling roller is also supported on two rows of the supporting wheels; the two rows of the supporting wheels are of a staggered arrangement structure in the axial direction of the levelling rollers; a supporting frame is arranged between every two adjacent supporting wheels in the axial direction of the levelling rollers; a fixed shaft is supported on each supporting frame; and each supporting wheel is rotatably arranged on the corresponding fixed shaft in a sleeving manner. According to the levelling roller structure for the levelling machine, the levelling rollers are not easily bent and deformed after the levelling machine works for a long time, so that the levelling effect of the levelling machine is good.