32results about How to "Constant pressing force" patented technology

The invention relates to device for pressing the roller (1)to a paired roller(2,3), capable of implementing constant compression force in the whole operation process by the following method. An actuator (5)for supporting lateral ends of a roller (1) is provided which can generate compression force, and produce the pressing movement of the roller, which runs along the desired compression force. The compression force is kept to a constant value by using a control device (7).

The invention belongs to the technical field of transportation machines and provides a constant-pressing-force sweeping system used for a ribbon conveyer and having an automatic compensation function. By the adoption of the constant-pressing-force sweeping system, the contact force between a scraping plate and a conveying belt is constant, and an ideal cleaning effect is achieved. The constant-pressing-force sweeping system used for the ribbon conveyer and having the automatic compensation function comprises a sweeper assembly, a rotating assembly, a hydraulic system and an electric control system. The rotating assembly is connected with a sweeper and a piston rod of a hydraulic cylinder of the hydraulic system. The electric control system detects and controls pressure information of the hydraulic cylinder. When the conveyer is stopped, the scraping plate is controlled to be separated from the conveying belt, so that the starting resistance when the conveyer is started next time is reduced; after the conveyer is started, the scraping plate is controlled to rapidly make contact with the conveying belt, and the set pressing force is obtained; when the scraping plate is abraded, an oil cylinder is automatically replenished with oil, and the effect that the pressure in the oil cylinder is constant is guaranteed; and when the scraping plate is abraded to the limit, the conveyer is stopped, and an alarm is given. By the adoption of the constant-pressing-force sweeping system, the starting resistance of the conveyer can be reduced, the pressing force between the scraping plate and the conveying belt is automatically controlled to be constant, and the sweeping efficiency and the automation degree are improved.

The invention involves an automatic ticketing system which can be applied in urban rail transport which includes the floor, the card box placed on the floor, the spindle fixed on the floor and a pressure card board sliding on the spindle. The invention will ensure that card's pressure on scratch card device in the scratching is constant, and it increases the scratch cards' stability, thereby improving the success rate of cards sending and reducing the injury of cards and scratch cards, extending the lifetime of card and scratch card.

The invention discloses an electric and spring coupling pressure foot pressing force measuring device and a control method. The method comprises the steps of: utilizing a dynamometer for calibration to obtain the average elastic coefficient of a rectangular spiral spring; calculating the compression deformation amount of the rectangular spiral spring through reading of a small laser displacement sensor, solving the pressing force of a pressure foot, comprehensively considering the pressing force fluctuation allowance caused by workpiece deformation, converting pressing force control into visual rectangular spiral spring displacement control by setting a compression amount threshold value, and indirectly controlling the pressing force of the pressure foot to be constant. The method is simple in measurement and control process and easy to implement.

The application discloses a glass chamfering device capable of preventing cooling water shortage, which includes a frame, a grinding disc, a water pipe, a circulating water pipe, a protective cover and a glass holding device; the grinding disc is arranged on the top of the frame, and the grinding disc The disc can rotate horizontally, and the grinding disc is equipped with a temperature sensor; the water outlets of the tap water pipe and the circulating water pipe point to the surface of the grinding disc; the tap water pipe is provided with a solenoid valve connected to the temperature sensor; The clamping device includes a rotating lifting rod, a cross bar, a suspension rod, a vacuum suction cup, a fixed disk, a rotating shaft and a third motor; the height of the rotating lifting rod can be lifted and rotated; the outer diameters of the fixed disk and the vacuum suction cup are smaller than The outer diameter of the beveled glass. The application enables the cooling water to be recycled, the cooling effect is good, and the clamped glass to be chamfered can be automatically rotated, so that each circumferential surface of the glass to be chamfered can be evenly chamfered, and the chamfering efficiency is high.

In order to tighten screw connections, a screw-in torque (17) which is effective during the screwing in of a screw is sensed and a compensation value (18) which is dependent thereon is determined, and the setpoint torque (20) is increased as a function of the previously determined compensation value (18) for the complete tightening of the screw (7).

The invention provides a sectional material pressing mechanism of plate machining equipment. The sectional material pressing mechanism of the plate machining equipment comprises two material pressingmechanisms arranged on one side of a machining device, each material pressing mechanism comprises a material pressing support, the material pressing supports are provided with elastic parts and a plurality of material pressing parts; the material pressing parts are movably installed on the material pressing supports, at least one elastic part of the material pressing mechanisms are air bags, and the air bags communicate with air pressure sensors; the material pressing parts are material pressing rings which are arranged on the air bags in a sleeve mode and are propped against the air bags through movable support columns, or the material pressing mechanisms are pressing blocks pivoted to the material pressing supports and propped against the air bags, the air bags are used as the elastic parts, then the air bags communicate with an air pressure sensor and directly measure the pressure of a workpiece applied by the material pressing mechanism in an air pressure monitoring mode, the magnitude threshold value and the sudden change condition of the pressure value can be visually monitored, and the accident conditions such as in-and-out slip, workpiece flying out and the like can be reflected by the air bags, the air bags is combined with the machine table equipment, a material can be pressed by directly stopping the machine, the workpiece is prevented from flying out, and the problem of the safety performance of the plate sanding/milling equipment blank plate material pressing device is poor is solved.

The invention relates to a simple constant-pressure fixture. The simple constant-pressure fixture comprises a guide sleeve, a hold-down oil cylinder and an upper oil cylinder; the hold-down oil cylinder is arranged in the guide sleeve; a hold-down piston is arranged in the hold-down oil cylinder; the bottom end of the upper oil cylinder is fixedly connected with the top end of the hold-down oil cylinder are fixedly connected, and the upper oil cylinder and the hold-down oil cylinder communicate with each other; a pressure limiting barrier part is arranged at the communicating position of the upper oil cylinder and the hold-down oil cylinder; a pressure limiting spring is arranged in the inner cavity of the upper oil cylinder; and a liquid return pipeline which can be selectively opened isfurther connected between the hold-down oil cylinder and the upper oil cylinder. The fixture disclosed by the invention is simple in structure and convenient to operate, is capable of meeting the requirement of having the same hold-down force on workpieces different in thickness, and avoids the defect that a simple hold-down device in the prior art has an excessive hold-down force on a thick workpiece but an insufficient hold-down force on a thin workpiece.

In this image generating apparatus, a driving gear portion is so formed that the diameter of the outer peripheral surface of a first toothless portion is smaller than the tip diameter of a first toothed portion, and so arranged that the first toothless portion thereof slides on a second toothed portion of a driven gear portion of a print head rotating member in the vicinity of a position where a print head presses a platen roller with a pressing portion.

The application discloses a self-radiating chamfering machine used for glass medicine bottle material analysis. The chamfering machine comprises a rack, a grinding disc, a cooling fan, a protective shield, a blowing-type dust collection cloth bag and a glass clamping device, wherein radiator fins are arranged on the lower surface of the grinding disc; the air outlet of the cooling fan faces to the surface of the grinding disc; a dust outlet is arranged on the rack along the air outlet direction of the cooling fan; the blowing-type dust collection cloth bag which is fixedly connected with the dust outlet is arranged on the bottom of the rack; the glass clamping device comprises a rotary lifting rod, a cross rod, a hanging rod, a vacuum sucking disc, a fixed disc and a rotary shaft; the height of the rotary lifting rod can change, and the rotary lifting rod can rotate; the outer diameter of the fixed disc and the outer diameter of the vacuum sucking disc are smaller than the outer diameter of to-be-chamfered glass. According to the self-radiating chamfering machine, the clamped to-be-chamfered glass can rotate automatically, so that each circumferential surface of the to-be-chamfered glass is uniformly chamfered, and the chamfering efficiency is high.

The present invention departs from an apparatus for stripping dirt off belts in conveyor belt assemblies in the area of a drive and/or head pulley of the belt comprising a system carrier to be attached to a belt carrier frame, at which at least one stripping element is arranged, the stripping element having a stripping lamella mounted on a lamella holder, the stripping lamella contacting the belt in a peeling position, and wherein the stripping element has a bottom swivel mount coupled to the lamella holder and having a horizontal swivel axis-indications such as 'horizontal' or the like here and in the following principally refer to the position of use of the stripping element as well as a spring means acting to press the stripping lamella on the lamella holder against the belt in such a form and arrangement that the lamella holder in the stripping position of the stripping lamella is swivelled about the horizontal swivel axis in a spring loaded fashion, and when obstructions fast adhering to the belt impact on the stripping lamella, the lamella holder may be easily deflected and returned back to the working position on the belt. In order for the stripping device to be able to be used in the pulley area of the belt at least as a pre-stripper having uniform stripping performance and long tool lives can be achieved also with high belt velocities associated with correspondingly great material amounts, it is provided that the stripping lamella is swivel mounted at the lamella holder by a top swivel mount having a horizontal swivel axis and is held by a top spring means in a spring biased fashion whose spring action-with respect to the bottom swivel mount and its spring means-is in the counter sense.

The invention discloses a separating type stuffing box comprising a hollow box body with an opening facing toward an upper bonnet, V-shaped fillers in the box body and a filler gland arranged on the box body. The upper bonnet is provided with a chamber accommodating the box body. The bottom face, of the lower end of the opening of the box body, is closely attached to the bottom face of the chamber of the upper bonnet. The box body is detachably connected with the upper bonnet. The separating type stuffing box is simple in structure, handy and practical.

The invention relates to the technical field of grinding and cleaning, and particularly discloses a constant-force pressing adjusting device for sealing surface cleaning operation. The device comprises a cleaning assembly, a spring assembly, a limiting screw assembly and an equipment carrying trolley, and the cleaning assembly is limited and fixed to the equipment carrying trolley through the limiting screw assembly; the distance between a grinding and polishing wheel in the cleaning assembly and the fixed sealing surface to be cleaned and ground where the equipment carrying trolley is located can be adjusted through the limiting screw assembly; and the spring assembly is arranged on the cleaning assembly, and the compression amount of the spring assembly is increased along with reduction of the distance between the cleaning assembly and the sealing surface to be cleaned and ground. The device is simple in structure, and the pressing force and the grinding force before operation can be adjusted without extra tools and operation experience; and meanwhile, the device has a self-adaptive flexible adjusting function, it can be guaranteed that the pressing force and the grinding force are constant in the operation process, and the device can work for a long time in a severe environment.

An automatic dumbbell-shaped sampling machine comprises a machine frame; a longitudinal reciprocating moving platform and a transverse moving platform are installed on the machine frame, the longitudinal reciprocating moving platform is provided with a fixture body and an explorator, and the transverse moving platform is provided with a milling cutter; and the front portion and the rear portion ofthe transverse moving platform are provided with counter weight devices correspondingly which are the same, and the milling cutter abuts against the explorator under pressing force action of the counter weight devices. The automatic dumbbell-shaped sampling machine achieves the effects that the automation degree of the manufacturing process is high, the pressing force between the milling cutter and a sample is constant, and milling one-time forming is conducted.