59results about How to "Change the elasticity" patented technology

The invention discloses a pavement compaction device capable of changing the compaction direction for civil engineering construction. The pavement compaction device comprises a support transverse plate, wherein a fixing rod frame is arranged at one side of the upper end surface of the support transverse plate; a tube body is arranged at one side of the fixing rod frame; the top end of the tube body is hinged to a top rod of the fixing rod frame; a gear shaft section is arranged at one end of a driving transverse shaft; a driving gear engaged with the gear shaft section is arranged on a drivingmotor main shaft; a rotating gear is arranged on a transmission transverse shaft; a plurality of incomplete gears matched with the rotating gear are arranged on the driving transverse shaft; a coiling wheel is also arranged on the transmission transverse shaft; a pull rope is wound on the coiling wheel; one end of the pull rope bypasses a transition pulley arranged at the top of the fixing rod frame to be connected with a sliding push plate arranged inside the tube body. The pavement compaction device has the advantages that the pavement compaction is convenient; the operation is simple and convenient; the force application intensity can be changed for adapting to different pavements; during the compaction, the structure is stable; the movement is convenient; meanwhile, the inclined pavement can be compacted; the application range is wide; the practicability is higher.

The invention relates to a small-amplitude parallel magnetorheological damper based on two polar plates. Two polar plates on an extension shaft are connected with a spring on an outer ring of a cylinder block through adjusting plates in parallel; and when the polar plates extrude magnetorheological fluid in a cavity through a reciprocating motion, the spring is compressed or elongated to generatedamping force. The adjusting plates can adjust the extension quantity of the spring to change the damping force provided by the spring. A magnetic exciting coil is arranged between the cylinder blockand an isolation cylinder; the current is adjusted to change the magnitude of a magnetic field; and the mode of the magnetorheological fluid is changed to adjust the damping force. The double polar plates and the spring are combined to realize the rigidity and damping adjustment of the damper; and the damper has the characteristics of small size, high damping force and high controllability, and inparticular, is suitable for the field of vibration control with smaller amplitude, such as vibration inhibition in the cutting process.

The invention discloses a pediatric clinical special sputum suction device. The pediatric clinical special sputum suction device comprises a sputum suction mechanism, a pressure limiting mechanism, aplaying mechanism and an observation mechanism; the sputum suction mechanism comprises a box body, a sputum suction tube penetrates through the box body, the side surface of the sputum suction tube isprovided with a pressure gauge, the two ends of the sputum suction tube are provided with a sputum suction head and a rubber plug respectively, the rubber plug blocks the mouth of a transparent collection tank, a vacuum pump is disposed on the top side of the interior of the box body, and the vacuum pump penetrates through the rubber plug through an air pipe; the pressure limiting mechanism comprises a fixed sleeve, the side surface of the interior of the fixed sleeve is fixedly connected with an orifice plate, the upper surface of the orifice plate is provided with a spring, and the end, away from the orifice plate, of the spring is provided with a ball plug. By adopting the pediatric clinical special sputum suction device, the internal pressure of the sputum suction tube can be limitedto prevent too high internal pressure of the sputum suction tube and avoid accidental damage to the respiratory tract of a pediatric patient, and the pediatric clinical special sputum suction device is convenient to use.

The invention discloses a wood board grinding device which comprises a grinding platform, a lower grinding mechanism and an upper grinding mechanism are arranged on the grinding platform, the lower grinding mechanism is arranged in the grinding platform, the upper grinding mechanism is arranged on the upper side of the lower grinding mechanism, and clamping conveying mechanisms are arranged on the two sides of the lower grinding mechanism and the two sides of the upper grinding mechanism correspondingly. The upper grinding mechanism and the lower grinding mechanism are each internally and rotationally connected with a grinding roller cutter structure. The wood board grinding device has the advantages that the inner driving shaft drives the outer cutter roller sleeve to rotate according to the structural design of the grinding roller cutter, when the cutter is clamped by a wood board, the outer clamping piece is separated from the clamping groove, so that the inner driving shaft and the outer cutter roller sleeve can generate relative rotation, and a motor is prevented from being burnt out under the cutter clamping condition; the insertion depth of an adjusting shaft core arranged in the inner driving shaft can be adjusted through a jackscrew, a circular-truncated-cone-shaped adjusting block arranged on the adjusting shaft core can abut against the inner clamping piece, and the elastic force, for extruding the outer clamping piece, of a first spring is effectively changed by changing the contact position of the adjusting block and the inner clamping piece.

An elastic adjustable mattress, comprising a mattress frame, a pad body, several pressure springs, and a bottom plate, the bottom plate is arranged on the bottom surface of the mattress frame, the mattress body is arranged on the upper surface of the mattress frame, and the pressure springs are uniformly arranged on the mattress body Between the bottom plate and the elastic force adjustment device whose number corresponds to the pressure spring and is used to adjust the elasticity of the pressure spring, the elastic force adjustment device is evenly arranged on the surface of the bottom plate, and the elastic force adjustment device is driven and connected with one end of the pressure spring, and the surface of the other end is provided with glue Pad, the rubber pad is pushed against the bottom surface of the pad body by the elastic force of the spring and is fixedly connected with the pad body. The present invention is provided with an elastic force adjusting device, and the elastic force adjusting device is connected to one end of the pressure spring by driving, and the elastic force adjusting device adjusts the tightness of the pressure spring to change the elastic force of the pressure spring. Since the elastic force adjusting device corresponds to the pressure spring, the bed can be realized. The adjustment of softness and hardness at different positions of the mattress is suitable for all kinds of people who have different needs for softness and hardness of the mattress.

A damping-rigidness-controllable double-freedom-degree vibration active control platform comprises a cross-shaped beam frame and a square base which are connected through a flexible hinge. A cross-shaped beam of the cross-shaped beam frame is distributed in the diagonal directions of the square base. A structure column is arranged at the center of the cross-shaped beam frame. Sensors and actuators are connected between the lower portions of the diagonal top ends of the cross-shaped beam frame and the square base respectively. Four limiting columns are arranged between the cross-shaped beam of the cross-shaped beam frame and the square base respectively. Prearranged gaps are reserved between the limiting columns and the cross-shaped beam frame. Four balancing weights are fixed on the lower portion of the cross-shaped beam frame between the sensors or the actuators and the limiting columns respectively. Twisting limiting spring pieces are arranged at the symmetrical positions on the lower portion of the cross-shaped beam frame between the limiting columns and the flexible hinge. The electromagnetic type sensors and the electric-damping electric-rigidness actuators are used to achieve detecting of angular speed and actuating, the flexible hinge and the spring piece with changeable thickness are combined to achieve controllable damping and rigidness in a quantifying mode, and double-freedom-degree vibration active control in the x direction and the y direction of the structure is achieved.

The invention discloses a damping base for mechanical equipment, and relates to the technical field of mechanical equipment accessories. The damping base for the mechanical equipment comprises a box,a separating plate is fixedly installed in an inner cavity of a bottom box, a first threaded rod and a second threaded rod are arranged on the two sides of the bottom of the separating plate, the first threaded rod is located on the right side of the second threaded rod, the top ends of the first threaded rod and the second threaded rod penetrate a base plate of the separating plate and extend tothe upper portion of the separating plate, the surface, located at the lower portion of the bottom box, of the first threaded rod is sequentially and fixedly provided with a first belt wheel and a second belt wheel from top to bottom, the surface, located at the lower portion of the separating plate, of the second threaded rod is fixedly provided with a third belt wheel, and a rotating motor is fixedly installed on the right side of the box. According to the damping base for the mechanical equipment, the first threaded rod and the second threaded rod rotate to drive a threaded plate to rise, aspring is pressed, and therefore elasticity of the spring on a lifting plate is changed; and by means of the design, an operator can conveniently adjust the damping amplitude of the device, and the damping efficiency is improved.

The invention discloses a damping protection device for the mechanical equipment. The damping protection device for the mechanical equipment comprises a supporting plate, wherein a plurality of groups of guide sliding rods are symmetrically and glidingly inserted and arranged onto the supporting plate; and a protection plate and a synchronous plate are jointly and fixedly installed at the upper ends and the lower ends of the plurality of groups of guide sliding rods; an air cylinder sliding block is slidably installed on the section, located above the supporting plate, of each group of the guide sliding rods; detection cylinders are symmetrically and fixedly installed on the supporting plate; and the upper end of each detection cylinder slidably penetrates through an air cylinder sliding block and is slidably provided with a supporting rod in an inserted mode; and the upper end of each supporting rod extends to the position above the protection plate and is provided with an assembling plate. The vibration amplitude change is detected, the force opposite to the vibration direction is provided, and the elastic force of a damping spring is changed, so that the vibration amplitude of the mechanical equipment is reduced, i.e., the active damping function is achieved; and the adjustable active protection function is achieved through contact detection on the vibration amplitude, and the influence of strenuous vibration on the mechanical equipment is reduced.

The invention relates to a spring curve variable magnetic suspension keyboard and a working method thereof. A magnetic suspension key comprises a fixed outer casing and a flexible structure; the flexible structure comprises a key cap, a key shaft, a suspension strong magnet and a copper foil; a fixed strong magnet is arranged at a position opposite to the suspension strong magnet; the suspension strong magnet is provided with two iron sheets; a crack is formed between the two sheets. The working method comprises the following steps of A initializing a microcontroller and obtaining e spring curve; B executing the step (2) to the step (4), wherein (2) obtaining pressed distance s' of the magnetic suspension key in real time; (3) controlling the magnetic suspension key elastic force; (4) obtaining key states. According to the spring curve variable magnetic suspension keyboard, the inherent repulsive force cannot be overlarge when the magnetic suspension key is pressed due to the iron sheets, the pressed distance of the magnetic suspension key is detected due to a three-conductor capacitor which is formed by the iron sheets and the copper foil; different touch feels are generated due to adjustment according to user requirements; a problem that poor contact is easy to generate due to mechanical contact points is overcame.

The invention discloses a spring plate with adjustable comfort, which comprises a spring plate body, a first fastener, a lifting lug, a truck floor, a telescopic rod, a first hook, a second hook, a central bolt, a first groove and The second groove, the outside of the spring plate body is provided with a first fastener, the two ends of the spring plate body are provided with lifting lugs, the lifting lugs are connected to the lower surface of the truck floor through the connecting piece, and the inside of the spring plate body is provided with a second groove. A groove and a second groove, rubber layers are installed inside the first groove and the second groove, a central bolt is arranged in the middle of the spring plate body, a second hook is arranged on one side of the center bolt, and a second hook is arranged on one side of the second hook. There is a first hook on the top, and the first hook is connected to the truck floor through a telescopic rod. This kind of spring plate can make the spring plate stretch, so that the spring plate changes its elastic force, and the first groove and the second groove inside the spring plate An inner layer of rubber dampens vibrations for increased comfort.

The invention discloses an automobile rubber spring seat comprising an installation base. The inner side of the installation base is connected with installation threaded rods through bearings in a rotating manner. The outer sides of the installation threaded rods are connected with a movement buckle plate through thread engagement. The movement buckle plate is located on the inner side of the installation base. The installation threaded rods penetrate the side wall of the installation base and extend to the outer side of the installation base. Spring fixing hooks are arranged on one side of the movement buckle plate, penetrate one side of the installation base and extend to the outer side of the installation base. A spring is arranged at the tail ends of the spring fixing hooks. An inner sleeve rod is arranged inside the spring. One end of the inner sleeve rod is fixedly connected with one side of the installation base. The automobile rubber spring seat is provided with the threaded rods, a sliding pressing plate and the inner sleeve rod, and the problem that because when the automobile rubber spring seat is used, it is hard to change the initial elastic force of the spring throughthe automobile rubber spring seat, the use effect of the automobile rubber spring seat is influenced is solved.

A metering valve having a valve housing, a channel, a valve body that can be moved in order to open and close the metering valve, and a spring, which applies a spring force to the valve body and thus keeps the valve body in a rest position. The spring is supported on at least one calibration body. The valve body, the spring, and the at least one calibration body are arranged in the channel, and the at least one calibration body is supported by a supporting component fastened in the valve housing by a material-bonding connection. A segment of the supporting component protrudes from the valve housing.

The constant vacuum degree mixer is used for oil burning engine, gas burning engine and oil and / or gas burning engine. Using the constant vacuum degree mixer in engine can make automobile and motorcycle saving energy by over 15 %, possessing excellent starting performance, stable idle performance, accurate gas distribution and greatly lowered exhaust pollution. The present invention has simple structure, low cost and high producibility.

In one embodiment a diagnostic test unit for analysing body fluid is provided which utilises a leaf spring (6) in combination with a seal (8), located in at least one section of a supply chamber opening, to shield the test tape (3) or test strips stored in the supply chamber (2) from the environment outside the chamber (2). The leaf spring (6) is applied directly over the opening of the storage chamber (2), closing it to the outside environment, after the chamber has been loaded with test tape or test strips and drying agent. The closing leaf spring (6) is sealed onto a face on the chamber which borders the opening and at least one section of the face is formed by a seal. The test tape or strips (3) exit through a gap between the closing leaf spring and the seal.

The invention relates to an adjusting device for an electric impact drill. The adjusting device comprises a gear case front shell, a torsion cover rotationally arranged on the top of the gear case front shell in a sleeving manner, a speed reduction mechanism arranged at the bottom of the gear case front shell, and a gear skipping structure arranged in the torsion cover. The gear skipping structure comprises an adjusting screw, a gear skipping gasket, an adjusting ring and an impact conversion gasket. The adjusting ring has the locking function on the gear skipping gasket and the impact conversion gasket. The torsion cover is provided with an upper boss, the adjusting ring is provided with a lower boss, the upper boss corresponds to the lower boss, and therefore when the torsion cover rotates anticlockwise, the adjusting ring is driven to rotate, and when the torsion cover rotates clockwise, the adjusting ring does not rotate; and in the adjusting ring rotating process, the locking function on the gear skipping gasket and the impact conversion gasket can be switched, switching of electric drill gears can be achieved, and therefore the gear switching can be achieved only through anticlockwise rotation of the torsion cover, and the effects of the short adjusting stroke and fast switching are achieved.