46results about How to "Uniform preload" patented technology

The invention relates to a three-dimensional elliptical vibration cutting device, belonging to the field of cutting and ultra-precision cutting machining of materials which are difficult to machine. A diamond cutter is guided through flexible hinge mechanisms respectively along an X direction, a Y direction and a Z direction, and further, is driven by three piezoelectric stacks respectively alongthe X direction, the Y direction and the Z direction; the piezoelectric stacks of the X direction and the Z direction are preloaded by preloading screw bolts along respective axial direction; the piezoelectric stack of the Y direction is preloaded through a screw bolt screwing wedge; the preloading processes of the three directions are mutually independent; through regulating and matching the initial phase position and the amplitude of a driving signal for each of the three piezoelectric stacks, the projections of the cutter location point movements of the diamond cutter in an X-Y plane and aY-Z plane are elliptical motions, and the projection of the cutter location point movements of the diamond cutter in an X-Z plane is reciprocating elliptical motion or linear motion. The three-dimensional elliptical vibration cutting device has a novel and simple structure, is easy to implement, and is beneficial to obtaining the best cutting machinability of the diamond cutter.

To provide a bearing device for a wheel, in which a preload control is easy and a uniform amount of preload can be applied with a bearing seal being mounted, the bearing device for the wheel includes an outer member, an inner member and double rows of rolling elements interposed between the outer member and the inner member. The outer member has a flange on an outer periphery thereof and also has an inner periphery formed with two rolling surfaces. The inner member is formed with rolling surfaces opposed to the rolling surfaces of the outer member. The double rows of the rolling elements are interposed between the rolling surfaces of the outer member and the inner member. A sensor for detecting the amount of preload of the bearing is provided in one of the outer and inner members.

The actuator has a cylindrical bearing housing (18) protruding, along with a bearing and a drive shaft of a rotor, into an opening (7) in a gear housing (21) of a gear unit (2). An outer side of the bearing housing and an inner side of the opening are geometrically mutually harmonized such that clamping points (14, 15) and tension-free places (29) are formed between the bearing housing and the gear housing, when the actuator is assembled. The clamping points exert pre-tensioning force on the bearing through the bearing housing.

The invention relates to an extrusion forming mold. The extrusion forming mold comprises a mold sleeve; a ladder-shaped inner cavity penetrating a vertical direction is disposed in the mold sleeve; the inner cavity comprises a mold plate cavity, a mold core cavity and an open cavity successively along an axial direction; a mold core is arranged in the mold core cavity; a mold plate is arranged in the mold plate cavity; an outer peripheral surface of the mold plate is sleeved by an elastic ring that elastically contracts and expands in a radial direction; the elastic ring is provided with an inner peripheral surface matching the outer peripheral surface of the mold plate in a flexible support manner and an outer peripheral surface matching with the inner wall of the mold plate cavity in a flexible support manner. With the extrusion forming mold, cracking phenomenon of the mold plate can be prevented and a service life of the mold is prolonged.

A power unit includes a cam damper mechanism having a cam member reciprocally and unrotatably provided on one of a pair of bevel gears, and rotatably provided on an extended shaft; a lifter member slidably and unrotatably provided on the extended shaft in an axial direction; a damper spring configured such that one end portion thereof is supported on a first flange portion of the extended shaft, and the other end portion thereof biases the lifter member toward the cam member in an axial direction by abutting on the lifter member, and the biasing force is supported by the one bevel gear. The extended shaft has the one of the bevel gears and the cam damper mechanism between the first flange portion and a first bearing, and is accommodated in the bevel gear case so as to be fixed to a bevel gear holder along with the first bearing.

The invention discloses an integrated side pressure V-shaped spring. The basic parameters of the integrated side pressure V-shaped spring include the material thickness and the width and height of a single-side opening of the spring. The integrated side pressure V-shaped spring is formed by directly bending a plane material by an annular column. The axis of the annular column is the center line of the spring. The single-side opening of the spring is a variable and changes along with changes of the angle of a conical head of the column. The central cross section of the spring is of left and right V-shaped openings. The angle theta of each V-shaped opening is smaller than 180 degrees. The two sides of the V-shaped openings can be of the same height and can also be of the different heights. The whole spring is of an annular structure.

The invention provides a clamp type pressurizing device for formation and capacity grading of a square battery cell. The clamp type pressurizing device comprises a clamp type tray, a support frame, a pressurizing connecting mechanism and a plurality of trays, the plurality of trays are movably connected to the support frame, and the plurality of trays are connected together to realize linkage; the pressurizing connecting mechanism is connected to one of the trays; the pressurizing device comprises a driving device and a fixed seat; the driving device is fixedly connected to the fixed seat; the output end of the driving device is detachably connected to the pressurizing connecting mechanism; and the pressure detection device is used for detecting the pressure borne by the tray. The tray is pressurized through the pressurizing device, the pressure on the tray is detected through the pressure detection device, and the pressure applied by the pressurizing device can be adjusted in time, so that the applied pre-tightening force is more uniform, more stable and optimal.

A lifting jack with a lifting pre-tightening device comprises an upper clamping jack body, a main jack body, a lower clamping jack body and the lifting pre-tightening device which are sequentially connected. The lifting pre-tightening device is composed of upper lifting clamping sheets, a pressing plate and a pre-tightening block. The pre-tightening block is a short cylinder with a boss at the bottom, and n conical holes used for mounting of the upper lifting clamping sheets are formed in the short cylinder. The pressing plate is in the shape of a circular ring, m through holes are formed in the circular ring, and an inner step is arranged in the circular ring. In the work state, the pre-tightening block is fixedly arranged on the upper clamping jack body of the main jack body, and the upper lifting clamping sheets are arranged in the conical holes, corresponding to the steel strands needing to be adjusted, of the pre-tightening block; and the pressing plate is located outside the pre-tightening block, the inner step of the pressing plate is clamped on the boss of the pre-tightening block, and bolts and gaskets penetrate the through holes in the outer surface of the pressing plate, so that the pressing plate, the pre-tightening block and the upper clamping jack body are connected. According to the lifting jack with the lifting pre-tightening device, in the lifting process, the problematic steel strands can be evenly pre-tightened in time, m is an integer from 2 to 20, and n is an integer from 7 to 66.

The invention relates to the technical field of MPCVD equipment, in particular to a tensioning device for an MPCVD, and solves the problems of incapacity of timely measuring and adjusting of tensioning force of a connecting rod in MPCVD equipment in the prior art. The tensioning device comprises a reaction cavity, a waveguide cavity and a connecting rod, a tensioning device body located below thewaveguide cavity is further mounted on the connecting rod, the tensioning device body comprises a tensioning assembly, an elastic element, a pallet, a pre-tightened piece, a tensioning piece and a weighing sensor, and the weighing sensor is electrically connected to a display. According to the tensioning device for the MPCVD, as the change of the tensioning force of the elastic element is caused by the change of the tensioning force of the connecting rod, the expected force of the elastic element can be measured at any time through the weighing sensor in the tensioning device body and displayed on the display, the change of the tensioning force of the connecting rod can be viewed at any time through the display, and the change of the tensioning force of the connecting rod can be measured timely, so that the tensioning force of the connecting rod can be adjusted timely.

The invention belongs to the technical field of pipelines, and particularly relates to a petrochemical conveying pipeline. The petrochemical conveying pipeline comprises pipeline bodies, the two pipeline bodies are connected through a left flange and a right flange, the left flange and the right flange are fixedly connected through a set of bolts, first sealing ring grooves are formed in the sides, in contact with each other, of the left flange and the right flange, O-shaped sealing rings are arranged in the first sealing ring grooves, a second sealing ring groove is formed in the end face, atthe outer ring of the corresponding first sealing ring groove, of the left flange, metal with lower hardness is inlaid in the second sealing ring groove, and a convex ring matched with the second sealing ring groove is arranged at the position, corresponding to the second sealing ring groove, of the end face of the right flange. According to the petrochemical conveying pipeline, the metal in thesecond sealing ring groove is extruded through the convex ring, so that the metal with lower hardness in the second sealing ring groove fills a gap between the convex ring and the second sealing ringgroove after being extruded, secondary sealing is carried out at the joint between the pipeline bodies, the sealing performance of the pipeline bodies is further guaranteed, and the potential safety hazard caused by leakage of petrochemical liquid in the pipeline bodies is prevented.

The invention relates to a drawing frame for a spinning machine for drawing a fiber composite (8), comprising top and bottom rollers and a loading arm (19) on which the top rollers of the drawing frame (2) are mounted, an output roller pair (5) which is formed by an output top roller (6) and an output cylinder (8) arranged thereunder, and a pneumatic compaction device (20) arranged downstream of the output roller pair (5) of the drawing frame (2) for compacting the drawn fiber composite (8) having a suction tube (17) which can be subjected to suction. The suction tube (17) is mounted on a bearing shell (25) and the bearing shell (25) is mounted on the output cylinder (7). In a compaction device for a drawing frame having a suction tube (17) which can be subjected to suction, the suction tube (17) is mounted on a bearing shell (25) and the bearing shell (25) is provided to be mounted on the output cylinder (7).

The invention relates to a drawing frame for a spinning machine, comprising top and bottom rollers, a loading arm (19) on which the top rollers of the drawing frame (2) are mounted, an output roller pair (5) which is formed by an output top roller (6) and an output bottom roller (7), and, mounted on the loading arm (19), a loading unit (26) on which the output top roller (6) is mounted. A pneumatic compaction device for compacting a drawn fiber composite (8) is arranged downstream of the output roller pair (5) of the drawing frame (2), said compaction device having a suction tube (17) which can be subjected to suction. The suction tube (17) is mounted on a lever (25), the lever (25) is rotatably and/or displaceably mounted on the loading unit (26), and a spring device (21; 21', 40, 41) isprovided which acts on the suction tube (17) and/or the lever (25) in order to elastically press the suction tube (17) against the output top roller (6) or the output bottom roller (7). A corresponding compaction device comprises a suction tube (17) which can be subjected to suction and a loading unit (26), wherein the suction tube (17) is mounted on a lever (25), the lever (25) is rotatably and/or displaceably mounted on the loading unit (26), and a spring device (21; 21', 40, 41) is provided which acts on the suction tube (17) and/or the lever (25) in order to be able to elastically press the suction tube (17) against the output top roller (6) or the output bottom roller (7).

The present invention relates to a piston member for a flush valve for lavatories and urinals, the flush valve having a valve body with an inlet and an outlet, and a valve seat at the outlet. The piston member is movable within the valve body towards and away from the valve seat to control flow from the inlet to the outlet. In the piston part there is a safety valve for communicating the pressure chamber of the flushing valve with the outlet of the flushing valve. The piston member has an outwardly directed lip seal which bears against the inner wall of the valve body and the lip seal is retained between facing elements of the piston member. The lip seal includes an insert, and an elastomer covering and substantially enveloping the insert. Both the elastomer and the insert have a portion extending towards the flush valve body, and the insert has a support element which contacts a facing element of the piston member, transferring load from such element from the lip Remove from the elastomeric body of the shaped seal.

The invention discloses a pre-pressing device for non-woven fabric processing, which mainly relates to the technical field of non-woven fabrics, including a seat frame, a transmission belt, a nozzle, a non-woven fabric, a grating, a first flattening mechanism, a respraying mechanism, a second pressure Flattening mechanism, conveyor belt flattening mechanism, weighing mechanism, ironing mechanism; the transmission belt set on the seat frame is used to transmit the processed non-woven fabric, and the grating set on the seat frame is used to detect whether the nozzle sprays evenly on the surface of the non-woven fabric; The first flattening mechanism is provided with several groups, which are used to roll and flatten the non-woven fabric; the second flattening mechanism can perform rolling operation on the non-woven fabric again; the weighing mechanism is responsible for the quality of the non-woven fabric. Inspection; the ironing mechanism is responsible for drying and flattening the non-woven fabric.