112results about How to "Increase preload" patented technology

According to the composite protective coating for the bolt surface, the preparation method and the application, the composite coating takes a bolt of a common model of an iron tower as a substrate, and a cathode arc ion plating technology and a magnetron sputtering technology are combined; the preparation method comprises the four main steps of substrate surface pretreatment, metal bonding layer preparation, metal nitride bearing layer preparation and surface molybdenum disulfide solid self-lubricating layer preparation. According to the method, reliable preparation of the composite coating on the complex thread surface of the bolt is achieved, the anti-loosening capacity of the bolt is remarkably improved through the low friction coefficient, good bearing capacity and excellent wear resistance, and meanwhile the composite coating further has good corrosion resistance and has wide application prospects in iron towers for communication, electric power and the like.

The invention relates to the technical field of electrolytic hydrogen production, and discloses a bipolar plate sealing method, a bipolar plate sealing structure and an alkaline electrolytic bath, the sealing method comprises the following steps: respectively arranging a first sealing monomer and a second sealing monomer of a sealing structure between two contact plate surfaces of a bipolar plate; when the bipolar plate is sealed, the third sealing single body extends into a contact surface gap between the first sealing part and the second sealing part; certain pressure is ensured between the bottom of the tank body and the tank cover, and then the length of the pull rod is adjusted according to actual requirements; observing indexes such as bubble size and yield, and adjusting the length of the pull rod; when the bipolar plate is disassembled, the third sealing single body extends out of the contact surface of the first sealing part and the second sealing part, and the third sealing single body recovers to the original shape. The invention further discloses a bipolar plate sealing structure which comprises a sealing convex block, a sealing groove and a sealing groove lug part. The sealing material is used for making up a small gap between the two contact faces, gas and liquid are prevented from escaping and leaking, and the good sealing effect is achieved.

The invention discloses a cleaning machine and a control method thereof. The cleaning machine comprises a rolling brush and a rolling brush motor used for driving the rolling brush to rotate. The pre-tightening force adjusting device is used for changing the pre-tightening force of the rolling brush to the ground; the recognition device is used for recognizing the type of dirt on the ground; wherein the rolling brush motor, the pre-tightening force adjusting device and the recognition device are all electrically connected to a controller arranged on the cleaning machine, and the controller is used for receiving and analyzing recognition information of the recognition device and controlling the pre-tightening force adjusting device to change the ground pre-tightening force of the rolling brush according to the recognition information. According to the cleaning machine, the recognition device is matched with the controller to automatically recognize the type of dirt on the ground, the pre-tightening force of the rolling brush on the ground is adjusted through the pre-tightening force adjusting device, so that targeted cleaning of different types of dirt is achieved, the controller can increase the pre-tightening force of the rolling brush for the dirt with high adhesion to enhance the cleaning effect, and the cleaning efficiency is improved. Effective cleaning of different types of stains is achieved, and the cleaning efficiency and effect are improved.

The present invention relates to the field of vacuum monitoring technology, and in particular to a vacuum preloading soil vacuum degree monitoring system and method, the monitoring system comprising: a plurality of acquisition modules, a plurality of vacuum degree sensors, a first comparison module generation module, a second comparison module, a marking module, a division module, a third comparison module and an adjustment module; obtaining the preloading data of each monitoring point in the target area, and determining whether the preloading conditions of each monitoring point meet the preset standards; analyzing the preloading data of each monitoring point, and classifying and marking each monitoring point according to the analysis results; dividing the target area into regions according to the classification and marking results, and determining the actual operation mode of each vacuum pump according to the regional division results. The present invention can effectively identify problems existing in the preloading process, timely adjust the operation mode of the vacuum pump, ensure the optimization of the preloading effect, improve the utilization rate of equipment such as vacuum pumps, and reduce resource waste.

The present application relates to the technical field of conductive trolley, in particular to a lifting type graphitization inner string furnace conductive trolley, which comprises a liftable frame, and further comprises a sliding mechanism, a sliding support part and a compensation mechanism, the compensation mechanism is provided with at least two, and two are arranged oppositely, one end of the compensation mechanism is connected with the sliding mechanism, and the other end is connected with a pressure regulating part. The liftable frame is arranged, so that the conductive trolley can be flexibly adjusted according to the actual height of the furnace head electrode, precise butt joint with electrodes of different heights can be completed without the help of external lifting equipment, and the convenience and adaptability of furnace charging and furnace discharging operation are improved. Through the cooperation of the pressure regulating part and the compensation mechanism, the spring pre-tightening force can be adjusted online, the push plate is driven to move and extrude the spring, the spring increases the pre-tightening force, so that the compensation mechanism can always provide stable and reliable compensation effect for the electrode, and the stability and reliability of electrode conduction are ensured.

This invention discloses a tab pre-compression device for bending the tabs of a battery cell wound on a winding needle. The device includes a shaft and a pre-compression unit mounted on the shaft. The shaft is parallel to the winding needle. The pre-compression unit includes a pre-compression surface for bending the tabs of the battery cell. The shaft is elastically mounted on a base, and a support unit is provided on the shaft. This support unit supports the battery cell and elastically compresses the shaft towards the base. This invention can pre-compress and bend the tabs at a specific angle during the battery cell winding process. Furthermore, it can gradually move away from the winding needle as the battery cell diameter increases to pre-compress and bend the outermost tabs of the battery cell, thus improving the tab pre-compression effect.

The present invention discloses a friction damper for a frame structure node and a building frame structure, wherein the damper includes a first energy consumption plate, a second energy consumption plate and a prestressed component. The aperture of the first end of the first elongated hole on the first energy consumption plate is smaller than the apertures at other positions; the building frame structure includes the above-mentioned friction damper. When an earthquake occurs, since the first end of the first elongated hole is close to the node and its aperture is smaller than the apertures at other positions of the first elongated hole, when the second energy consumption plate and the frame crossbeam simultaneously move in the first elongated hole relative to the frame column, the prestressed component can abut against the inner wall surface of the first end, and the second energy consumption plate and the frame crossbeam simultaneously rotate relative to the first energy consumption plate and the frame column with the prestressed component at the first end as the rotation axis, without the need to separately set up the existing connecting sleeve and rotating shaft, the structure of the entire friction damper is simplified, the space occupied is reduced, and the assembly and disassembly of the friction damper is also convenient.

The invention provides a cleaning device and a cleaning machine, the cleaning device comprises a shell, a cleaning roller and an adjusting wheel assembly, the cleaning roller is arranged in a containing cavity defined by the shell and rotatably connected with the shell, the cleaning roller can rotate and clean a to-be-cleaned surface, the adjusting wheel assembly is slidably connected with the shell, and the adjusting wheel assembly abuts against the to-be-cleaned surface, the adjusting wheel assembly can move in the first direction relative to the shell so that the cleaning roller can move in the direction away from the to-be-cleaned face, the cleaning roller and the to-be-cleaned face can be separated, or the pressure between the cleaning roller and the to-be-cleaned face is reduced, the pulling force needed by a user for pulling the cleaning device can be reduced, and the experience feeling of the user for the cleaning device is improved; the adjusting wheel assembly can move in the opposite direction of the first direction relative to the shell so that the cleaning roller can move in the direction close to the to-be-cleaned face, the pre-pressure of the cleaning roller on the to-be-cleaned face is increased, the cleaning effect of the cleaning roller on the to-be-cleaned face can be improved, and an included angle is formed between the first direction and the to-be-cleaned face.

The invention relates to a servo drive (10) for a steering system (1) of a motor vehicle, comprising a worm shaft (12); a rolling bearing (14) for supporting the worm shaft (12), wherein the worm shaft (12) is inserted into a bearing inner ring (14a) of the rolling bearing (14) with a transition fit; a hub (16) pressed onto the worm shaft (12), the hub (16) being designed to transmit a torque generated by an electric motor (18) of the servo drive (10) to the worm shaft (12), wherein the bearing inner ring (14a) of the rolling bearing (14) can be clamped between the worm shaft (12) and the hub (16) with a predetermined preload force (F) by at least one deformation element (20a, 20b) arranged on the bearing inner ring (14a) and / or on a component of the servo drive (10) arranged axially adjacent to the bearing inner ring (14a). The invention also relates to a steering system (1) for a motor vehicle.

The invention discloses a wiring terminal production laser cutting device and process, and relates to the field of laser cutting devices.The wiring terminal production laser cutting device comprises a machine body, bases are symmetrically installed at the top of the machine body, and the tops of the bases are connected with a positioning plate through air cylinders; a dust collection wave tube is rotationally arranged at the top of the positioning plate, a swing range adjusting assembly for the dust collection wave tube is arranged in the positioning plate, the two sides of the dust collection wave tube are connected with the inner side faces of the long ends of side plates, and the side plates and the dust collection wave tube form a fan-shaped dust collection structure; a base plate is arranged on the outer end face of the positioning plate, a clamping spring is arranged between the outer end face of the positioning plate and the base plate, and a pre-tightening force adjusting assembly of the clamping spring is arranged in the positioning plate. According to the laser cutting device and process for wiring terminal production, through linkage operation of clamping positioning, synchronous dust collection range adjustment, reciprocating swing dust collection and pre-tightening force adjustment, wiring terminal clamping, cutting dust efficient cleaning and clamping force self-adaption are achieved, and the laser cutting quality is improved.

A return towing head for directional synchronous crossing of a main pipeline and an outer casing, relating to the field of pipeline crossing technology, includes an outer casing, a main pipeline, and a return towing head. Reinforcing plates are welded to the outer wall of the outer casing at equal intervals along the circumference. The return towing head includes a main body, with tie rods evenly spaced along the circumference at the ends of the main body. The tie rods can extend between two reinforcing plates, and a limiting plate is provided at the end of the tie rod. When the outer casing and the return towing head need to connect, the limiting plate is placed horizontally on the reinforcing plates on both sides, thus forming an effective connection. A central cylinder is provided inside the main body, and a top block is slidably mounted radially upward on the central cylinder. One end of the top block can abut against the inner wall of the main pipeline. A drag rod is slidably mounted axially upward on the central cylinder, and the drag rod has a conical portion. The other end of the top block can abut against the conical portion of the drag rod. When the drag rod is dragged outward, the conical portion pushes the top block out and presses it tightly against the inner wall of the main pipeline. Thus, this application achieves synchronous dragging of the outer casing and the main pipeline by the return towing head.

The invention relates to the technical field of optical devices, in particular to an optical adjusting frame, an optical testing device and an adjusting method of the optical adjusting frame. The optical adjusting frame comprises a fixed support, an adjusting support, a first elastic part and a second elastic part. The adjusting support is provided with a first driving part and a second driving part, one end of the first elastic part is connected to the fixing support, the other end of the first elastic part is connected to the adjusting support, the first elastic part is driven by the first driving part, and the first driving part is configured to adjust the compression or extension state of the first elastic part; one end of the second elastic part is connected to the fixing support, the other end of the second elastic part is connected to the adjusting support, the second elastic part is driven by the second driving piece, and the second driving piece is configured to adjust the compression or extension state of the second elastic part. The rigidity of the first elastic part is larger than that of the second elastic part. The optical testing device comprises the optical adjusting frame. The adjusting precision of the optical adjusting frame can be improved.

The invention belongs to the field of agglomerate fog monitoring, and particularly discloses a quick release type highway agglomerate fog monitoring device which comprises a quick release mechanism, a visibility detection mechanism, a wind speed sensing detection mechanism and a mounting rod. The near-ground visibility can feed back the influence degree of the severe weather on the traffic, and the transverse movement speed relative to the road feeds back the influence duration of the severe weather on the traffic, so that the visibility detection mechanism disclosed by the invention feeds back the visibility of the detected space through the scattering rate of laser when the laser is propagated in the air; the detection mode has the characteristics of good real-time performance and high accuracy, and meanwhile, the movement speed of the agglomerate fog can be detected through the wind speed sensing detection mechanism which only senses transverse air flow, so that a prediction basis is provided for traffic guidance.

The utility model relates to the technical field of mechanical equipment manufacturing, and relates to a pre-tightening device for a bearing, a rotating mechanism and a PCB forming machine. The pre-tightening device for the bearing comprises a fixing base and a pre-tightening assembly. The fixed seat is provided with a containing cavity, the containing cavity is used for containing the bearing, the rotating shaft connected with the bearing is arranged in the containing cavity in a penetrating mode, and one movable part of the bearing is fixedly arranged relative to the rotating shaft; the pre-tightening assembly comprises a driving piece and a driving pressing plate, the driving piece is connected to the fixing base, the driving pressing plate is connected to the driving piece, the driving pressing plate abuts against the other movable part of the bearing, and the driving piece is used for applying driving force to the driving pressing plate so as to adjust the clearance of the bearing. When the pre-tightening device for the bearing is used, the driving piece and the driving pressing plate are arranged to be matched, the driving piece can apply pressure to the driving pressing plate, the clearance of the bearing is adjusted by adjusting the pre-load of the bearing, the clearance of the bearing can be adjusted on the premise that shutdown is not needed, the structure is simple, and the using effect is good.

The utility model discloses an odor-resistant floor drain core, which belongs to the technical field of floor drains, and adopts the technical scheme that the odor-resistant floor drain core comprises a shell, a sealing assembly, a sealing cover and a reset mechanism, the shell is provided with a water inlet, the sealing assembly is arranged in the shell, and the sealing assembly is provided with a water outlet communicated with the water inlet; a supporting arm is arranged at the lower end of the shell, a support is arranged on the supporting arm, the sealing cover is located between the water outlet and the support, and the sealing cover is slidably connected with the support; the reset mechanism is arranged in the sealing cover and / or the support and can apply pre-tightening force to the sealing cover, so that the sealing cover and the sealing assembly are matched to seal the water outlet. The floor drain core is more reasonable in structure, larger in drainage area of the water outlet, high in drainage efficiency, more stable in sealing performance, longer in service life and better in performance in actual use.

The utility model provides a sealed type hydraulic pipe joint which comprises a first protective sleeve, a second protective sleeve, a first clamping ring, a second clamping ring and a pre-tightening mechanism, a communicated through cavity is arranged on the inner side of the first protective sleeve and the inner side of the second protective sleeve, the first protective sleeve is arranged on the outer side of a connector high-pressure piece in a sleeved mode through the through cavity, and the second protective sleeve is arranged on the outer side of the connector high-pressure piece. The hydraulic pipe joint is sleeved with the second protective sleeve, the outer surface of the first protective sleeve is sleeved with the second protective sleeve, a first clamping ring is fixedly arranged on the outer surface of the first protective sleeve, and a second clamping ring is fixedly arranged on the outer surface of the second protective sleeve. According to the scheme, after the hydraulic pipe joint is installed, the hydraulic pipe joint can be applied to the outer side of a high-pressure part by arranging the first protective sleeve and the second protective sleeve in a sleeving mode, and the hydraulic pipe joint in a high-pressure environment is protected; the second protective sleeve moves in the axial direction of the first protective sleeve through the threads on the outer surface of the first protective sleeve and compresses the telescopic spring, the friction force between the second protective sleeve and the threads of the first protective sleeve is increased, and therefore the pre-tightening force is increased, and the sealing performance is guaranteed.

The utility model discloses a combined vibration massage component, relates to vibration device technical field, including vibration component and install vibration motor on the vibration component, the vibration component includes conducting strip and connecting strip, conducting strip and connecting strip fixed connection, the bottom of vibration component is equipped with first motor seat, the first motor seat is equipped with second motor seat, the second motor seat is equipped with second motor seat. The bottom of the vibration motor is fixedly connected with a second motor base, through holes are formed in the four corners of the second motor base and the four corners of the first motor base, bolts are arranged in the through holes in a sleeved mode, and the vibration assembly is located between the second motor base and the first motor base. According to the combined type vibration massage assembly, different vibration and using effects can be achieved, the effects of large-scale vibration, local vibration and prolonging of the service life of the vibration assembly are achieved, and the situations of plastic deformation and elastic deformation of the vibration assembly caused by long-time vibration are avoided.

The present application belongs to the technical field of aviation piston engine. The present application discloses a kind of cylinder body structure and connecting method of air-cooled two-stroke aviation piston engine, to solve the problem of heat load concentration, aluminum alloy strength decline, cylinder deformation caused by the contact thermal resistance of aluminum alloy cylinder and cylinder cover connection area is too large, in the present application, connecting screw and threaded hole are matched with fine thread to increase contact area, reduce contact thermal resistance and enhance heat conduction performance;Threaded hole counterbore is treated to reduce the amount of residual gas in the hole, reduce the obstruction of gas to heat conduction;Connecting anti-loosening strictly prohibits the use of thread glue, to avoid local temperature rise. And using TC4 titanium alloy screw material, threaded hole circumferential uniform arrangement and enough connection depth and other supporting design, systematically make the heat of connection area conduct and dissipate efficiently, avoid the strength decline caused by heat load concentration, improve the anti-deformation ability of cylinder, ensure that the roundness and cylindricity of cylinder meet the design requirements, the engine performance maintains stable under design condition.

The utility model provides a water meter shell capable of being rapidly disassembled and assembled, and belongs to the technical field of water meters. The water meter shell capable of being rapidly disassembled and assembled comprises a meter shell body and a pair of connecting mechanisms, the meter shell body comprises a bottom shell and a top cover, the top cover is installed at the top of the bottom shell, a pair of connecting pipelines is installed on the outer side of the bottom shell, each connecting mechanism comprises a first connecting sleeve and a second connecting sleeve, and the second connecting sleeves are installed at one ends of the connecting pipelines. A flange is installed at one end of the first connecting sleeve, a connecting ring is rotationally connected to the outer side of the first connecting sleeve, a plurality of vertical strips are installed on one side of the connecting ring at equal intervals, transverse strips are installed at one ends of the vertical strips, a limiting ring is installed on the outer side of the second connecting sleeve, and a plurality of limiting holes are formed in the side face of the limiting ring at equal intervals. According to the technical scheme, the flange can be independently taken down, and therefore the effect that a user can conveniently disassemble the water meter with the meter shell in a narrow space can be achieved.

The invention discloses a radial sealing structure for a rotor engine. The radial sealing structure comprises a radial sealing piece, a trapezoidal sealing groove, a spring piece and a reverse spring piece. The radial sealing piece is mainly composed of sub-sealing pieces, sealing piece side plates and a high-pressure gas guide groove and is provided with 5-12 sets of sub-sealing pieces and the sealing piece side plates on the two sides. The thickness of the sealing piece side plate is gradually reduced from bottom to top, and eight gas guide grooves are formed in the sealing piece side plate and used for introducing high-pressure gas to lift the radial sealing piece. The trapezoid groove is composed of a sealing groove and a mounting bottom plate, the bottom of the sealing groove is a plane, and the two sides of the sealing groove are inclined planes of 85 + / -5 degrees to form a trapezoid structure. And the mounting bottom plate is used for connecting the trapezoidal sealing groove with the stator and dispersing pressure. The spring piece is of an arch-shaped structure, has the curvature with the radius being 60 mm, is composed of four bullet reeds arranged in parallel and two spring piece supporting feet, and provides pretightening force between the radial sealing piece and the rotor. The reverse spring piece is also of an arch-shaped structure and is composed of three secondary reverse spring pieces and two reverse spring piece supporting legs, and additional pre-tightening force is provided. The components work synergistically to ensure that the radial sealing fins are in close contact with the surface of the rotor, prevent air leakage, improve the sealing performance, improve the sealing performance and durability of the rotor engine, reduce friction force and prolong the service life.

The utility model relates to an electromagnet framework with a pre-tightening mechanism, which comprises a framework body, a mounting channel is arranged in the framework body, the inner side wall of the mounting channel extends towards the axis direction to form an annular pre-tightening ring, the pre-tightening ring and the framework body are integrally formed, and the inner diameter and the outer diameter of the annular pre-tightening ring are both reduced from the lower edge to the upper edge. According to the structure, the electromagnet framework is made of nylon plastic, in the structure, the pre-tightening ring and the electromagnet framework are made of nylon plastic, the pre-tightening ring has certain elasticity, when the framework body is installed on the magnetic attraction base, the pre-tightening ring can be expanded and abut against the side face of the magnetic attraction base only by pressing the framework body downwards, and meanwhile due to the fact that the pre-tightening ring has elasticity, the pre-tightening ring can be separated from the side face of the magnetic attraction base. According to the method, the installation speed of the framework body can be increased, meanwhile, the pre-tightening effect is good, and the situation that one end of the electromagnet framework tilts up after installation is completed is avoided.

The invention discloses a cantilever type appliance for locking back teeth. The cantilever type appliance comprises a retainer, a connector and a cantilever body, the retainers are ring-shaped and sleeve part of tooth crests in the circumferential direction of the teeth, and at least two retainers are symmetrically arranged in the dentition arrangement direction; the connecting body comprises a tooth side connecting body and a palatal side connecting body, the tooth side connecting body is connected between the retainers on the same side, and the palatal side connecting body is connected between the retainers on the opposite side; the cantilever body is formed by extending the retainer / connector towards the depth of the dentition, the cantilever body is arranged on the buccal side / palatal side of the tooth, the cantilever body is arranged close to the palatal side of the buccal inclined tooth, and the cantilever body is formed on the retainer and extends towards the depth of the dentition; the cantilever type appliance is customized for the patient according to the locking degree of the internal rear teeth of the patient, then the cantilever type upper jaw appliance and the cantilever type lower jaw appliance are integrally printed through the 3D printing technology, foreign body sensation in the oral cavity of the patient can be weakened, and the problem that welding points in an existing appliance are prone to desoldering is solved.

The utility model provides an underwater high-definition cable. The underwater high-definition cable comprises a wire rod, a sealing piece, a pressing assembly, a connecting assembly and a supporting ring. The wire rod comprises a wire rod main body and a wire rod coating layer wrapping the wire rod main body; the sealing element is annularly arranged at the periphery of the wire rod coating layer; the pressing assembly is arranged on the periphery of the wire rod in a surrounding mode and arranged on the side, away from the wire rod coating layer, of the sealing piece in a pressing mode so that the sealing piece can be tightly attached to the wire rod coating layer. The connecting assembly is arranged on the periphery of the wire rod in a surrounding mode and used for being connected between the pressing assembly and the waterproof shell in a sealed mode. The support ring is arranged around the circumference of the wire rod main body, and is clamped between the wire rod main body and the wire rod coating layer, or is positioned in the wire rod coating layer, or is positioned on the outer surface of the wire rod coating layer; the projection of the support ring along the radial direction of the wire body in the support ring at least partially coincides with the sealing member. The supporting ring is arranged to support the sealing element, so that the sealing element can be prevented from excessively extruding the cable, a cable core in the cable is prevented from being broken, and the signal transmission stability and waterproof depth of the high-definition cable are improved.

The invention relates to the technical field of electro-hydraulic servo valves, in particular to a servo valve hydraulic amplifier structure which comprises an armature assembly and a first-stage seat, a through hole is formed in the middle of the first-stage seat, the armature assembly I is installed on the upper surface of the first-stage seat through a spring tube, and a cylindrical boss is arranged at the lower end of the spring tube and located in the round through hole in the middle of the first-stage seat. A belleville spring is placed below the cylindrical boss of the spring tube, the small end of the belleville spring is in contact with the end face of the cylindrical boss of the spring tube, an upper pressing block is arranged below the belleville spring in a contact mode, a jet piece is arranged below the upper pressing block in a contact mode, a lower pressing block is arranged below the jet piece in a contact mode, and the upper pressing block, the jet piece and the lower pressing block are connected and positioned through positioning pins. The armature assembly sequentially penetrates through the spring tube, the upper pressing block, the jet piece and the lower pressing block, the upper pressing block, the jet piece and the lower pressing block are arranged in the through hole from top to bottom, the sealing ring is arranged between a cylindrical boss at the lower end of the spring tube and the round through hole in the middle of the first-stage base, and the environment performance and the service performance of the jet amplifier can be improved.

The utility model discloses a high-strength bolt connecting structure which comprises a basic part and further comprises a reinforced connecting structure, the reinforced connecting structure comprises a part to be installed in butt joint with the basic part, a lower hole and an upper hole are formed in the butt joint portions of the basic part and the part to be installed respectively, and an expansion sleeve is installed in the middle of the upper hole and the lower hole in an inserted mode. Wing plates are arranged on the periphery of the expansion sleeve, and self-tapping screws are installed in the wing plates in a screwed mode. An extrusion plate is arranged in the expansion sleeve, outer expansion blades are arranged on the back of the extrusion plate on the expansion sleeve, an inner expansion sleeve is inserted into the expansion sleeve, inner expansion blades are arranged on the edge of the inner expansion sleeve, threads are arranged on the inner side of the inner expansion sleeve, a frame plate is arranged on the top of the inner expansion sleeve and fixedly connected with the edge of the expansion sleeve, and a main bolt is screwed into the surface of the threads. And a mounting hole is formed in one side of the main bolt. According to the utility model, through the arrangement of the reinforced threaded connection structure, the positioning and stabilizing effects of the device are improved by adding a three-point positioning type auxiliary positioning mode on the outside.

This invention discloses a bearing press-fitting device, comprising: a machine base, a positioning plate disposed below the machine base, positioning screws disposed at each of the four corners of the positioning plate, the other end of the positioning screws passing through the machine base and extending above it, a press-fitting plate fitted over the four positioning screws and sliding on their exterior, and a buffer protection assembly for supporting the press-fitting plate disposed outside the positioning screws; the buffer protection assembly includes an adjusting seat and a return spring, wherein the return spring is disposed above the adjusting seat for supporting the press-fitting plate, and the adjusting seat is slidably disposed on the outer wall of the positioning screws for adjusting the extension space of the return spring to increase its preload. The bearing press-fitting device proposed in this application uses an adjusting seat to adjust the extension space of the return spring, increasing the preload of the return spring, avoiding elastic fatigue of the return spring after long-term repeated compression, which would cause the press-fitting plate to fail to fully return to its original position, reducing the trouble of replacing the return spring and lowering maintenance costs.

The utility model discloses a heat exchanger with a plate-type structure, which comprises a plate-type heat exchanger component, a fixed plate, a clamping movable plate, a rear support, an upper guide rod, a lower guide rod, a bolt rod and a heat exchange plate sheet, wherein the fixed plate, the clamping movable plate and the rear support are vertically parallel, the upper guide rod, the lower guide rod and the bolt rod are horizontally parallel, and the heat exchange plate sheet is arranged between the fixed plate and the clamping movable plate; the blocking frame comprises a blocking plate fixed to the upper guide rod and the lower guide rod through bolts, an attaching plate fixed to the clamping movable plate through bolts and a transmission piece installed between the blocking plate and the attaching plate, and the transmission piece comprises a fixing block perpendicular to the blocking plate, a bolt shaft penetrating through the fixing block and a rotating arm rotationally connected with the bolt shaft; through the designed blocking frame and the damping seat, under the synergistic effect of the blocking frame and the damping seat, the purpose of abutting against the clamping movable plate is achieved, the pre-tightening force of the clamping movable plate is further increased, a pressure sensor transmits a signal to an alarm lamp, the risk that the clamping movable plate and a heat exchange plate of the plate heat exchanger are loosened and leakage exists is reminded, and the plate heat exchanger has the reminding function.

This utility model discloses an integrated vulcanized sealing seat for a wedge brake self-adjuster, including a support frame. A vulcanized sealing ring is provided on the top of the support frame, and an oil seal spring is provided at the edge of the top of the vulcanized sealing ring. This utility model, by assembling a vulcanized sealing ring on the top of the support frame, provides good toughness and tensile strength after vulcanization, suitable for supporting and adjusting the brake. The top of the outer side of the vulcanized sealing ring is provided with an oil seal spring, ensuring high sealing performance and preventing external impurities from entering. An integrally formed auxiliary leak-proof outer ring is sleeved and engaged on the outer sides of the first and second mounting rings, providing auxiliary sealing. An auxiliary sealing ring is provided on the inner side of the vulcanized sealing ring, creating a sealed inner and outer connection that is not easily detached or leaking. This results in excellent sealing performance and anti-detachment capabilities, stable interference fit, improved preload, and automatic compensation of interference fit even with continuous wear of the sealing ring, demonstrating excellent durability and protective properties.

This application discloses a pipe clearing device, including a clearing body, the clearing body including an air storage chamber and a pressure regulating component, the pressure regulating component being configured to regulate a preset air pressure in the air storage chamber. The pressure regulating component is characterized by comprising an regulating body, a regulating valve, an operating component, and an elastic element. The regulating body has a pressure relief hole communicating with the air storage chamber; the regulating valve is configured to open and close the pressure relief hole; the operating component is configured to be adjustable in position relative to the regulating body along the moving direction of the regulating valve; the elastic element is disposed between the regulating valve and the operating component; when the positions of the operating component and the regulating body are adjusted along the moving direction of the regulating valve, the elastic potential energy of the elastic element is changed to adjust the preset air pressure in the air storage chamber. Compared with the prior art, and compared with traditional fixed springs or mechanical limiting structures, this design significantly improves the flexibility and adaptability of air pressure regulation.

The invention provides a pre-tightening force enhanced type spin riveting blind bolt. The pre-tightening force enhanced type spin riveting blind bolt comprises a core rod, and a driving body, an expansion ring, a forming sleeve, a nail body, a locking ring and a spinning bushing which are arranged on the core rod in a sleeving manner, wherein the core rod is of a slender rod structure, the tail end of the core rod is connected with the riveter chuck, a broken diameter groove is formed in the middle of the core rod, and an end head is arranged at the head end of the core rod; the driving body, the forming sleeve and the nail body are of an integrally-arranged tubular structure, the forming sleeve forms a flexible deformation area, a containing cavity used for containing the expansion ring is formed in the forming sleeve, and the driving body is connected with the head end of the core rod in a clamped mode. The spinning bush is of a rotary body structure internally provided with a stepped hole, the locking ring is arranged in the stepped hole and connected with the end face of the stepped hole of the spinning bush in a meshed mode, and a shearing groove is formed in the outer ring of the spinning bush. The core rod pulling and rotating combined motion mode is achieved, the pre-tightening force of a product can be improved by 50% or above, and the connecting requirement of a high-clamping-force connecting part can be better met.