34results about How to "No change in dimensions" patented technology

The invention discloses a cavity filter. The cavity filer comprises a metal cavity and a metal cover plate which is positioned on the metal cavity, wherein the metal cavity comprises at least eight resonance cavities which are coupled in sequence; a resonance rod is arranged in each resonance cavity; and the resonance rods in the first and the last resonance cavities are connected with an input signal connector and an output signal connector respectively. The coupling between the adjacent resonance cavities is magnetic coupling; coupling windows and coupling rods are arranged between the corresponding resonance cavities on the left and right sides of a passband; four places of crossed coupling is introduced, so that two transmission zero points can be generated on the left and right sides of the passband respectively, and higher out-of-band rejection can be achieved; the outline dimension of the overall filter cavity is not changed; the order of the filter is not increased, and the size of the filter is not enlarged; meanwhile, the cavity filter is easy to process and debug, and low in cost; and the large-batch production of the cavity filter can be achieved.

The invention relates to an active vibration damping control method for a mechanically dithered ring laser gyroscope. In the bottom space of an installation housing provided with a mechanically dithered ring laser gyroscope, N equally spaced damping weight spokes are arranged between a central base and an external wall of the installation housing, and the N weight spokes are in rotational symmetry about the center of the central base; both sides of each vibration damping weight spoke are provided with piezoelectric ceramic sheets, wherein one is used for detecting a dither signal generated by a mechanical dither device of the mechanically dithered ring laser gyroscope and then inputting the signal to a processor; and the processor outputs an active damping driving signal voltage and loads the voltage onto the remaining 2N-1 piezoelectric ceramics. The method simplifies the complex process of actual parameter adjustment, shortens the setup time of active vibration damping and improves the control precision.

The invention relates to a vertical-type injection mold of an improved plug, comprising a movable die, a fixed die and a die strip. The fixed die comprises a fixed template; a thimble mechanism is arranged below the fixed template; the upper bottom side of the fixed template is sequentially provided with a lower slot, a lower mold cavity and a lower die strip slot for placing the die strip; a lower bottom plate is arranged below the thimble mechanism; the movable die comprises a movable template; an upper slot, an upper mode cavity and an upper die strip slot are arranged on the lower bottom side of the movable template; an upper bottom plate is arranged above the movable template; the movable die and the fixed die are positioning through a guide post and a guide sleeve; the fixed template is internally provided with a holding cavity; a hot runner device is arranged on four sides of the holding cavity in a suspending and positioning way; an inlet of the hot runner device is arranged on a nozzle plate; an outlet of the hot runner device is provided with a hot runner electric heat nozzle; a nozzle of the hot runner electric heat nozzle is arranged near the cavity of the lower die cavity and is communicated with the cavity; or the nozzle of the hot runner electric heat nozzle is directly communicated with the lower die cavity. The mold has the advantage that less or no injection waste is produced without changing the overall dimension of the existing vertical-type injection mold.

The invention provides a fast pulling-down device for roller shutter doors, comprising a drive plate, a hoisting mechanism and an electronic control starting mechanism, wherein the hoisting mechanism comprises a rotating rod and a positioning sleeve kept fixed; one end of the rotating rod is fixed with the top end of a brake rod, and the other end of the drive plate; the rotating rod and the positioning sleeve are in threaded fit connection; the drive plate drives the rotating rod to rotate under the drive of the electronic control starting mechanism and drives the brake rod to move up and down by utilizing the thread lead angle between the drive plate and the positioning sleeve. The invention provides the fast pulling-down device for roller shutter doors, which is simple and compact in structure, low in cost, high in control precision and wide in application range.

The invention provides a metal carrier band for packaging a noncontact module with large size which is characterized in that the metal carrier band comprises a chip bearing region which can bear a chip of 3.9*4.5mm. The chip which is 1.5 times of the area of a common chip can be bear and packaged, and a module product with the same mechanical size is obtained. By the improvement of the metal carrier band and under the premise of the increased size of the packaged chip, the combining force of a mould body with the metal carrier band is improved to the maximum extent after the mould packaging, therefore, the mechanical force resistance of internal devices is improved greatly. The carrier band is packaged in a reeling way. Under the premise of not adding the investment, the present conventional packaging process and the existing equipment can be used for producing products with better quality, therefore, the application of high-end chips, such as noncontact intelligent electronic passport, EMV band card, and the like in the intelligent card field is expanded.

The object of the present invention is to provide a rubber bearing for low-speed and heavy-duty environments, including a bearing housing, a control valve, and a pump. The inner wall of the bearing housing is provided with slats, and the slats are fixed to the bearing housing by bolts. Axial flow holes are set in the axial direction, radial flow holes are set in the radial direction of the bearing shell, tangential flow holes are set in the position tangent to the inner wall of the bearing shell inside the bearing shell, and a main pipe is set on the outer wall of the bearing shell. The control valve and the pump are connected in sequence through the pipeline. The radial flow hole, tangential flow hole and axial flow hole are all connected. The end of the axial flow hole is connected to the main pipe. Corresponding to the position of the water hole. The invention directly injects water with a certain pressure into the gap between the shaft and the bearing through the water hole to form an effective dynamic pressure lubrication method; the opening position of the water hole can be arranged in a targeted manner according to the actual load state of different ship bearings, So as to achieve better results.

The invention relates an automobile cardan joint transmission shaft packaging paper box,which mainly solves the problem of easy damage owing to the low supporting strength of the existing ball cage assembly packaging paper box. The packaging paper box is characterized in that both ends of a box body (1) with a supporting paperboard (2), the middle which is provided with a through hole (3); the supporting paperboard (2) is folded, and then forms a triangulate with the end surface (5) of the box body (1); after the supporting paperboard (2) is folded, the through hole is caused to be matched with an end socket of the ball cage assembly. The cardan joint transmission shaft changes supporting form of two end sockets in the box body, adds supporting strength of the paper box on the ball cage assembly while not adding the cost of the paper box, does not change outline size of the original box body, and is characterized by convenient assembly, simple structure, low cost and being difficult to damage.

The invention discloses a small electromagnetic relay of large current. The small electromagnetic relay of large current comprises a movable spring part, the movable spring part comprises a movable reed, a contact bridge and two movable contacts; one end of the movable reed is a U-shaped structure, the contact bridge is presented as a U-shaped structure matched with one end of the movable reed; two tail ends of the U-shaped structure are respectively riveted with the contact; the movable contact is fixedly connected with the movable reed and the contact bridge. An appearance size cannot changed when adding one contact bridge; when the relay is in work, the movable reed is used for providing the movable contact pressure, the basic action performance cannot be influenced; the contact bridgeis used for providing the cross section required by current carrying, and larger current can pass the contact bridge.

The invention discloses a B-dot probe for vacuum diode electric current measurement. The B-dot probe comprises a cable seat, a grounded shell, a connecting rob, a vacuum cable connector and an insulating sheet, and the cable seat and the grounded shell are fixedly connected through a bolt as one; a through hole is arranged on the axis of the cable seat, the vacuum cable connector is arranged in the through hole, the insulating sheet is arranged in the grounded shell, the grounded shell is connected with the cable seat through a bolt, a induction coil is arranged between the insulating sheet and the cable seat, one end of the induction coil is connected with the vacuum cable connector, and the other end of the induction coil is connected with the cable seat. According to the invention, the B-dot probe has advantages of good design, simple and easily-realized structure, convenient operation and relatively low maintenance cost, the B-dot probe has highlighted substantive features and remarkable progress, and the B-dot probe is suitable to be widely popularized and applied in the field of vacuum diode electric current measurement.

The invention discloses an intelligent temperature measurement static contact device which is of an integrated structure comprising a static contact, a temperature measurement sensor and a metal electricity taking meter band element. The static contact is of a cylindrical structure, the static contact, the temperature measuring sensor and the metal electricity taking meter band element are assembled into a whole set, an annular band groove is formed in the surface of the static contact, and the annular band groove is provided with at least one temperature measuring sensor mounting groove and an annular metal electricity taking meter band fixing groove; and a temperature measurement sensor body is provided with a metal electricity taking meter band fixing groove, the temperature measurement sensor is correspondingly placed in a static contact installation groove, a temperature sensing element in the temperature measurement sensor is in reliable contact with the static contact, and a metal electricity taking ring penetrates through the sensor body and then is reliably fixed in the static contact installation groove. According to the static contact, the appearance size of an original static contact is not changed, and the wireless passive temperature measurement function is achieved; the temperature measuring point is close to the contact surface of the static contact and a tulip contact, so that the actual contact surface temperature can be accurately reflected; and the integrated structural design facilitates detection and replacement.

The invention provides a forced lubrication bearing with distributed holes. A header pipe is arranged in a bearing body, pressurization holes leading to the inner surface of the bearing body are axially and circumferentially formed in the bearing body, all the pressurization holes are gathered in the header pipe in the bearing body, the header pipe is connected with a pressure servo mechanism through a pipeline, if the bearing body is circumferentially spread, the pressurization holes form an M*N grid, the distances between the pressurization holes are not uniformly distributed in axial and circumferential directions, and the distances between the pressurization holes close to the maximum pressure point are decreased gradually. The pressure servo mechanism is started when detecting that ashaft system is under a low-speed operation condition, a pressurization medium is forcedly injected below the operating shaft system through the pressurization holes, so that the pressurization mediumsprayed out of the pressurization holes lifts a position with larger shaft system load, the shaft system is ensured to always form a liquid film with the bearing under the rotation condition, the poor lubrication state of the bearing is improved, and the frictional wear of the bearing is relieved.

The invention relates to a multi-level car with staggered floors. The car (10) comprises a lower layer (16) and an upper layer (18) separated by an intermediate floor (20), the intermediate floor comprising a lower portion (28), a higher portion (30) and a transition portion (32). The lower layer (16) comprises a lower aisle (24) for passage of passengers, which extends at a higher portion (30) ofthe floor (20), and the upper layer (18) comprises an upper aisle (26) for passage of passengers, which extends on a lower portion (28) of the floor (20). Each of the lower layer (16) and the upper layer (18) includes a seat (22) at a lower portion (28) of the floor (20) and a seat (22) at a higher portion (30) of the floor (20).

The invention provides a wall power socket. The wall power socket comprises a panel and a bottom cover arranged on the rear side of the panel. A WIFI switch control device is arranged on the upper side of an accommodating space formed by the panel and the bottom cover, and a power supply pin for inserting a plug of an external electric appliance is arranged on the lower side of the accommodating space; and the panel is provided with a power jack corresponding to the power supply pin in position and shape. The WIFI switch control device is arranged at the upper part of the accommodating space formed by the panel and the bottom cover, and the power supply pin is arranged below the WIFI switch control device. According to the arrangement, the internal space of the socket is arranged compactly and reasonably, so that the appearance of the wall power socket additionally provided with the WIFI switch control device is not changed, and the wall power socket can be directly replaced with a wall power socket which is only provided with a power jack connected with an external electric appliance plug; therefore, the single wall power socket also has the functions of WIFI switch control and power supply for external electric appliances, and is more suitable for the needs of modern life.

The invention relates to a method for improving FRP tendon concrete structure ductility, comprising the step of building an FRP tendon concrete structure. When the FRP tendon concrete structure is built, a component with effective compressive strength and formability is installed in a zone which has larger bending moment of the FRP tendon concrete structure so as to improve the ductility capability of the structure. Under the condition of constant FRP tendon formability, the invention effectively increases the deformation of the concrete compressive zone and the curvature ductility of a crosssection, overcomes the defect of the brittle failure of the FRP tendon concrete construction member to ensure that the FRP tendon can be widely applied. The invention does not change concrete appearance size, has convenient construction, is economically feasible and is a method for effectively improving the FRP tendon concrete structure ductility.

The invention discloses a method and structure for improving the rigidity of an antenna support of a subway vehicle. A carbon fiber reinforcing pipe is installed in a steel pipe of the antenna support, the carbon fiber reinforcing pipe is closely attached to the steel pipe. The method specifically comprises the steps: welding the steel pipe to form a frame of the antenna support; machining the inner wall of the steel pipe through a steel pipe inner wall machine, so that a concave-convex surface is formed on the inner wall of the steel pipe, the carbon fiber reinforced pipe is tightly attachedto the inner wall of the steel pipe, and the carbon fiber reinforced pipe is fixed in the steel pipe through a positioning block; and welding the end support to complete the overall assembly of the antenna bracket. According to the method, the characteristics of high specific modulus and low density of the carbon fibers are utilized, the bending rigidity of the antenna support is improved under the conditions that the boundary dimension of the antenna support is not changed and the structural quality of the antenna support is not greatly improved, then the bending vibration dominant frequencyof the antenna support is improved, and the problem that the antenna support is broken is solved; meanwhile, the structure design is simple, the structure process is mature, and the design and production requirements of the antenna support can be met.

The invention discloses a fin separating-sheet type helical radiant tube. The fin separating-sheet type helical radiant tube comprises a corundum base, a central pull rod, multiple thermal-resistant steel supporting sheets, multiple flat-band type high-temperature electrical heating elements, corundum separating sheets, corundum ceramic circular disks and conductive bolts, wherein one end of the central pull rod is vertically mounted on the corundum base; the thermal-resistant steel supporting sheets are vertically mounted on the central pull rod; the multiple flat-band type high-temperature electrical heating elements are arranged between the thermal-resistant steel supporting sheets; two corundum separating sheets are mounted at the other end of the central pull rod; the corundum ceramic circular disks are mounted on one side of the corundum separating sheets; and conductive bolts are mounted on one side of the corundum ceramic circular disks. According to the fin separating-sheet type helical radiant tube, the original electrical heating alloy wires are changed into the electrical heating bands with the purpose of enlarging the heating areas of the electrical heating elements without changing the outline dimensions of the electrical heating radiant pipes.