30results about How to "Reduce bending deformation" patented technology

The utility model belongs to welding processing technical field especially relates to a kind of welding wire conveying tool, comprising: base frame, base frame is in and is equipped with storage groove;Conveying component, including first roller and second roller, first roller and second roller are rotatably set in storage groove;Driving assembly, installation is in base frame, for driving first roller to rotate;Wherein, the welding wire to be conveyed is wired through between first roller and second roller, and first roller and second roller are used to clamp the welding wire along the radial direction of welding wire;The beneficial effects of the utility model are that the first roller and second roller are rotated to realize the clamping of welding wire, so that the welding wire can be automatically wired to the processing end of welding robot, and the automatic welding wire conveying operation is completed;At the same time, the clamping force received by the welding wire during conveying is small, which avoids the occurrence of adverse conditions such as weld serpentine bending, inconsistent welding size and a large number of abnormal splashing, and effectively improves the welding quality.

The invention discloses a bus duct structure and an assembly method thereof, and the bus duct structure comprises a housing which is provided with at least one installation groove. The insulating layer is attached to and covers the inner surface of the mounting groove; the insulating layer is arranged in the mounting groove, the groove opening of the mounting groove can allow the connecting row to enter or exit from the mounting groove along the depth direction of the mounting groove, the connecting row is embedded in the mounting groove through the groove opening of the mounting groove, and the connecting row is in contact with the insulating layer in an attached manner. According to the bus duct structure and the assembly method thereof provided by the invention, the assembly steps can be effectively simplified, and the temperature rise can be reduced.

The application discloses a composite steel pipe single pile filled with recycled building materials and a construction method thereof, and belongs to the technical field of steel pipe piles. The composite steel pipe single pile comprises a steel pipe pile body, a cavity is arranged in the steel pipe pile body, the cavity is used for filling recycled building materials, a plurality of interface connecting mechanisms are arranged in the cavity, and a sealing mechanism is arranged on the top surface of the steel pipe pile body. By constructing a steel-filling core composite cross-section structure, the cross-section inertia moment and the overall bending stiffness are improved, the pile top displacement and bending deformation can be effectively reduced under the action of horizontal load, the single pile horizontal bearing capacity is improved by optimizing the cross-section stress system under the condition of controlling the steel consumption, and the structural material utilization efficiency is improved. The collaborative working capacity between the steel pipe and the filling body is enhanced through the interface connecting structure, the overall stress performance of the composite structure is improved, the air retention space in the steel pipe is reduced by filling the recycled building materials, the temperature and humidity fluctuations are alleviated, and the internal service environment is improved.

The invention discloses a noise reduction windscreen wiper strip and a processing method, the noise reduction windscreen wiper strip comprises a rubber strip main body and at least one supporting piece, and the supporting piece is arranged in the rubber strip main body and used for reducing noise generated when the rubber strip main body wipes glass by increasing the strength of the rubber strip main body. The supporting piece is arranged in the rubber strip body, the supporting piece is used for enhancing the attribute of the windscreen wiper strip, the strength of the windscreen wiper strip is enhanced, the windscreen wiper strip is not prone to generating noise due to inertia when the direction of the windscreen wiper is changed, and therefore the noise reduction effect is achieved. The supporting piece is arranged in the rubber strip main body, so that high-frequency vibration or up-and-down shaking of the wiper strip during wiping can be prevented, the structural rigidity is increased, the inherent frequency is changed, resonance caused by friction between the wiper strip and glass and speed change is reduced, pressure distribution of the wiper strip is improved, pressure of all parts of the wiper strip is uniform, local deformation of the wiper strip is avoided, and the service life of the wiper strip is prolonged. And the fitting degree of the windscreen wiper strip and the glass surface is ensured, so that rainwater is ensured to be completely wiped.

This utility model discloses a novel LED backlight module that is convenient for transportation, relating to the technical field of backlight module technology. The utility model includes an outer frame, with a baffle connected to the upper part of the inner side of the outer frame. Buckles are connected to both sides of the baffle, and a cushioning pad is connected to the bottom of the baffle. Through the baffle and buckles, this utility model effectively shields the light-shielding film and the bent flexible flat cable, preventing direct contact and friction with other modules during transportation. Simultaneously, the buckles securely fasten the baffle to the top of the outer frame, and the abutment between the baffle and the inner wall of the outer frame around its perimeter comprehensively restricts the vertical and horizontal displacement of the baffle, ensuring the stability of the protective structure and reducing the risk of damage to the light-shielding film and flexible flat cable. This facilitates the protection of the light-shielding film and flexible flat cable during transportation.

The utility model discloses a trimming tool for a lead of a surface-mounted device. The trimming tool comprises a support part, a tool bit part and a positioning part, the tool bit part is mounted on the support part; the support part comprises a base; the positioning part comprises a positioning frame; the positioning frame is mounted on a base of the support part; the positioning frame is provided with a limiting plate with a square hole; the cutter head part comprises a cutter head with an acute inclination angle; correspondingly, the base is provided with a tool edge groove, and the tool edge groove is matched with the tool bit. Guide arms are arranged on the two sides of the tool bit. According to the surface-mounted device lead trimming tool, leads on the same side of a component can be trimmed at a time, and bending deformation of the leads is reduced; meanwhile, the trimming size of the lead of the component is controlled, and the consistency is high; the structure is simple, positioning is accurate, and operation is convenient.

The present application relates to quenching equipment field, specifically disclose a kind of aluminium alloy online quenching equipment, including heating box, primary cooling box and secondary cooling box, the side of heating box discharge is equipped with support plate, the both ends of primary cooling box and secondary cooling box are all equipped with through slot, multiple spray heads for spraying atomized cooling oil are equipped in primary cooling box, oil storage tank is equipped in secondary cooling box, oil storage tank both ends are equipped with through material slot for aluminium alloy piece, four copper pipes are slidably installed in oil storage tank.The cooling speed of aluminium alloy piece is adjusted in the present application, electric sliding block drives copper pipe to slide, the heat absorption speed around aluminium alloy piece changes by copper pipe, the cooling speed of corresponding surface of aluminium alloy piece changes, the heat around aluminium alloy piece can be controlled, the temperature around aluminium alloy piece can also be adjusted by controlling the water pump speed, and the position of copper pipe is cooperated.

The utility model discloses a bending device which comprises a fixed seat, a rotating seat is rotatably connected to the fixed seat, a rotating clamping assembly is connected to the rotating seat, a follow-up pressing assembly capable of abutting against a product is arranged on the fixed seat, and a follow-up driving unit is connected to the fixed seat. The follow-up pressing assembly is connected to the fixing base in a sliding mode, the follow-up pressing assembly is connected with the follow-up driving unit, and the extension direction of the follow-up pressing assembly on the fixing base is the extension direction of a product on the fixing base. According to the bending device provided by the utility model, clamping follow-up is adopted, so that the bending deformation is reduced, the problems of serious bending deformation, instability and uncontrollability of a product are solved, the deformation can be reduced, the tool adjusting time can be shortened, and the production efficiency can be improved.

The utility model discloses a shock absorber mounting structure, front suspension system and car, including shock absorber, the lower extreme of shock absorber is equipped with lower mounting support, and lower mounting support includes first support component and second support component, and the first support component forms the sleeve joint department of tubular, and the sleeve joint department has the opening in one side, and the second support component is embedded in the opening, and the inside is defined with shock absorber mounting hole, and the lower extreme of shock absorber is sleeved in shock absorber mounting hole, and the top end of second support component extends upwards along the outer wall of shock absorber, and forms the support of protruding in first support component top end edge, and at least one of first support component and second support component is equipped with first mounting lug and second mounting lug. When the wheel core lateral force is transmitted to the shock absorber lower mounting support through the knuckle, the support of the first support component can provide effective support for the shock absorber, reduce the bending deformation of the shock absorber in the position connected with the support, and effectively improve the system rigidity.

This application relates to the field of wind turbine blades and discloses a wind turbine blade comprising at least one web. The web includes a first surface and a second surface disposed opposite to each other along its thickness direction. The web has a plurality of hole structures penetrating the first and second surfaces. The plurality of hole structures includes a first group and a second group. The first group has a decreasing trend from the first surface to the second surface, and the second group has a decreasing trend from the second surface to the first surface. The area formed by the first group and the second group on the first surface is equal to the area formed by both on the second surface. This design balances the strength of the web and maintenance requirements while improving the stability of the wind turbine blade, even with the hole structures in the web.

The utility model relates to the technical field of glass production and processing, and discloses a glass conveying device which comprises a base and a mounting seat, one end of the mounting seat is hinged to the base, a driving part is hinged to the base, an output shaft of the driving part is hinged to the mounting seat, the driving part can drive the mounting seat to incline, and a driving unit and a conveying mechanism are arranged on the mounting seat. The driving unit can drive the conveying mechanism to rotate, and the conveying mechanism is used for conveying glass. According to the technical scheme, the cleaning efficiency of the etching liquid can be improved, and secondary corrosion of the etching liquid to the surface of the glass is reduced.

The utility model relates to the technical field of electric power facility protection, and discloses an anti-bird thorn, which comprises a mounting seat, a bird thorn cover, a bird thorn outer cover and bird thorns, the bird thorn outer cover is sleeved on the bird thorn cover, the tops of a plurality of bird thorns sequentially penetrate through the bird thorn cover and the bird thorn outer cover, the lower ends of the bird thorns are provided with limiting parts for preventing the bird thorns from sliding out of the bird thorn cover, the bird thorn cover is sleeved on the mounting seat, and the bird thorn cover is sleeved on the mounting seat. A plurality of bird thorns on the outer side of the bird thorn outer cover are provided with bird thorn retracting and releasing pieces, the bird thorn retracting and releasing pieces can slide on the bird thorns and enable the bird thorns to be folded or unfolded, and one bird thorn is fixedly connected with a limiting piece used for limiting the bird thorn retracting and releasing pieces from sliding out of the bird thorns. The anti-bird thorn can be folded during transportation, bending deformation of the anti-bird thorn is reduced, it is guaranteed that the shape of the unfolded anti-bird thorn meets the bird repelling requirement, the bird repelling effect is improved, and the anti-bird thorn is convenient to assemble and install and high in practicability.

The utility model provides a kind of full-solid-state electric core anti-bending anti-wrinkle isostatic pressing mould based on flexible contact, including die steel frame, flexible contact pad, flexible edge pad, edge edge-pressing structural member;The upper surface of die steel frame is provided with the die groove matched with the electric core body of electric core, the shape of flexible contact pad is matched with the electric core body of electric core, the shape of flexible edge pad is matched with the package edge of electric core, the shape of edge edge-pressing structural member is matched with the package edge of electric core, and a plurality of connecting holes are correspondingly provided on die steel frame with edge edge-pressing structural member.The utility model adopts flexible edge pad to press the edge aluminum plastic film part of electric core, edge edge-pressing structural member applies uniform plane pressure to electric core edge, after isostatic pressing, aluminum plastic film edge is smooth, and wrinkle is greatly reduced, by using flexible contact pad to contact the surface of electric core, so that electric core is uniformly stressed, effectively solve the edge concave problem in isostatic pressing process, and significantly reduce the bending deformation of electric core.

The application relates to an electronic device accessory, comprising: a shell; a support rotatably connected to one side of the shell along the thickness direction of the shell; wherein the outer contour of the support is rectangular, and at least two corners of the outer contour of the support are rounded; the length dimension L1 of the support along the shell satisfies 38mm<=L1<=126mm, and / or the width dimension W1 of the support along the shell satisfies 62mm<=W1<=80mm. The support has a larger size, improves the structural stability of the support itself, reduces the possibility of bending deformation of the support in a supporting state, increases the contact area between the support and a supporting surface such as a desktop, reduces the possibility of sliding deviation of the support on the supporting surface in the supporting state, and further improves the reliability of the support. The outer contour of the support is a rectangle with rounded corners, which can be more matched with the shape of a rectangular electronic device, and the user experience is improved.

The utility model discloses a kind of anti-bending window trim rod, it is related to window trim field, and its technical scheme main point is: including hollow pole body, pole body inside is provided with anti-bending rod, anti-bending rod is arc-shaped, the upper end of pole body inner wall is contacted by the middle part of anti-bending rod, the lower end of pole body inner wall is contacted by the both ends of anti-bending rod.The utility model is arc-shaped by anti-bending rod and the both ends form three-point pre-tightening support with pole body inner wall, when pole body is subjected to external force, through reverse pre-tightening force, bending moment is cancelled, and bending deformation is reduced.

The invention discloses a power generation transmission device and wind power generation equipment. According to the power generation transmission device, at least the Nth-stage planetary acceleration mechanism in a speed increaser is arranged in a machine shell of a power generator, and the Nth-stage planetary acceleration mechanism is in transmission connection with a rotating shaft of the power generator. In other words, one part of the speed increaser is embedded into the generator, so that the integration level of the power generation transmission device is improved, and the axial length and size of the power generation transmission device and the wind power generation equipment carrying the power generation transmission device are reduced. When wind power generation equipment is installed, the axial length of the power generation transmission device is reduced, so that the arrangement difficulty of a speed increaser in a cabin is reduced, the power generation transmission device has higher rigidity, the bending stress of the power generation transmission device is obviously reduced, and the bending deformation of the power generation transmission device can be reduced; therefore, the risks of compression deformation and damage of the internal structure of the wind power generation equipment due to insufficient rigidity of the power generation transmission device are reduced, and the service life of the wind power generation equipment is prolonged.

The invention discloses a compression assembly, a compressor and a heat pump system, and relates to the technical field of compressors, the compression assembly comprises a crankshaft, a main bearing and an auxiliary bearing, the main bearing and the auxiliary bearing are used for supporting the crankshaft, and the crankshaft is provided with a first eccentric part, a second eccentric part, a first balance block and a second balance block; the first eccentric part and the second eccentric part are located between the main bearing and the auxiliary bearing on the crankshaft, and the first eccentric part and the second eccentric part are further located between the first balance block and the second balance block on the crankshaft. According to the technical scheme, two pairs of couples are formed between the centrifugal force of the balance block and the centrifugal force of the eccentric part through the arrangement of the balance block, the couple moment directions of the two pairs of couples are opposite, and the couple moment directions of the two pairs of couples are at least partially counteracted, so that the net couple moment borne by the crankshaft in the rotating process is greatly reduced; the supporting force or the supporting torque provided by the main bearing or the auxiliary bearing for achieving axial balance of the crankshaft is reduced, and therefore the bearing reaction force or the bearing reaction torque borne by the bearings is reduced.

The utility model relates to the field of internet of things communication technology, specifically disclose a kind of internet of things antenna, including the SMA straight male head of supporting seat, supporting seat is rotatably provided with antenna seat, antenna seat is provided with arc seat, further including the main conductor of arc conductor, arc conductor is active in arc seat, arc conductor is provided with subconductor, and subconductor is connected with antenna seat.The utility model provides an internet of things antenna, by the length of wire is reserved and obtained with arc conductor main conductor, and make arc conductor be in the installation room bulge position in arc seat, promote arc conductor have the length required to exceed wire deformation bending, and then when subconductor follow antenna seat and move, arc conductor is kept stable, effectively reduce the deformation bending of wire, weaken the stress damage caused by external force to wire, guarantee wire communication work.

The utility model belongs to the field of anti-bending devices, and particularly relates to a heat treatment anti-bending device which comprises an insulating bottom plate, two adjusting assemblies are arranged on the top of the insulating bottom plate, a fixing frame is arranged on the top of one adjusting assembly, and a fixing disc is arranged on the top of the other adjusting assembly. Three hot bending prevention assemblies are arranged in the fixing disc. During use, a workpiece body is placed to penetrate through the fixing frame and the fixing disc, then the adjusting bolts are rotated, and the positions of the saddle blocks and the positions of the rolling wheels can be adjusted through threaded fit between the adjusting bolts and the fixing disc, so that the rolling wheels are attached to the workpiece body, the workpiece rotates around the centers of the three rolling wheels, and three-point contact is achieved; and in the heat treatment process, the workpiece body always moves along the axis of the roller, so that the heat treatment bending deformation is reduced, and the straightness requirement of the heat treatment procedure is improved.

This application provides a control method for a surface cleaning device. The surface cleaning device includes a cleaning machine and a base for placing the cleaning machine. The cleaning machine includes a cleaning component and a floor scraper. The floor scraper includes a scraping part with a front side facing the cleaning component and a rear side facing away from the cleaning component. When the cleaning component cleans the surface to be cleaned, the front side of the floor scraper abuts against the surface to be cleaned. The surface cleaning device is also provided with a driving component. The control method of the surface cleaning device includes: when the cleaning machine is placed on the base, the driving component causes the rear side of the scraping part of the cleaning machine to engage with the surface of the base. This application can alleviate the bending of the scraping part of the floor scraper when the cleaning machine is placed on the base.

The utility model relates to a reinforcing device for old bridge diaphragm plates, which comprises a U-shaped reinforcing plate and a plurality of parallel webs arranged on the lower surface of a beam plate, a plurality of diaphragm plates are arranged between two adjacent webs, the U-shaped reinforcing plate covers the outer surfaces of the diaphragm plates, and two sides of the U-shaped reinforcing plate are respectively attached to the webs on two sides. A fixed connecting rod is installed on one side of the outer surface of the U-shaped reinforcing plate, an adjustable connecting rod is arranged on the other side of the outer surface of the U-shaped reinforcing plate, first flange plates are installed at the end of the fixed connecting rod and the end of the adjustable connecting rod, and every two corresponding first flange plates are connected through a first bolt and nut piece. Every two adjacent U-shaped reinforcing plates are connected together, acting force can be transmitted and shared between the U-shaped reinforcing plates, the whole bridge structure can resist external force more effectively, stress can be distributed more evenly when a bridge bears loads, and the risk that the structure is damaged is reduced.

The application provides a kind of pneumatic monorail crane brake spring assembly and pneumatic monorail crane brake device, including first spring seat assembly, second spring seat assembly, brake spring, compression release mechanism and guide mechanism;First spring seat assembly and second spring seat assembly are oppositely arranged along brake spring axial direction, and brake spring is arranged between the two pressing plates;Compression release mechanism includes a plurality of pull rods threaded through the two pressing plates and nuts threaded with the pull rods, and the distance between the two pressing plates is changed and limited by adjusting the position of the nuts;Guide mechanism includes positioning guide cylinder and positioning guide rod inserted therein, for guiding the axial relative movement of the two spring seat assemblies.The assembly can be installed as a whole to the brake part or removed from the brake part, reducing the difficulty of brake spring assembly and maintenance;The cooperation of pull rod and nut can realize spring compression, release and locking, reduce the risk of sudden release;The cooperation of guide cylinder and guide rod can limit the bending deformation of spring, improve the stress state and prolong the service life.

This application discloses a door body and a storage device, belonging to the field of refrigeration technology. The door body includes: a door shell; a door liner, spaced apart from the door shell along a first direction; and a handle trim strip connected between the door shell and the door liner, forming a handle groove for operation, and including a first sub-trimmed strip and a second sub-trimmed strip connected to each other. The first sub-trimmed strip is connected to the door shell, and the second sub-trimmed strip is connected to the door liner. The first sub-trimmed strip includes a first overlapping plate extending along a second direction, and the second sub-trimmed strip includes a second overlapping plate extending along the second direction. The first overlapping plate and the second overlapping plate overlap along a third direction. Through the above-mentioned split handle trim strip design, combined with the overlapping cooperation of the first overlapping plate and the second overlapping plate, the bending force caused by the internal and external temperature difference is effectively dispersed and offset, significantly improving the bending resistance of the door body, greatly reducing the risk of bending deformation of the door body, and enhancing the sealing between the door body and the door frame.

The present application discloses a converter slag blocking device, in which a raised platform and a butt joint platform are arranged in the brick arrangement, and the bowl brick is cancelled, the service life of the brick arrangement and the taphole is improved, the original brick arrangement and the easy brick arrangement are arranged, the precision of the brick arrangement installation is improved, the brick arrangement pressing plate is a flat plate type and is provided with a stepped lifting hole and a lifting hook in the lifting hole, the bending deformation of the brick arrangement pressing plate is reduced, the quick lifting problem of the brick arrangement pressing plate is solved, the precision of the brick arrangement installation is further improved, the brick arrangement overhang of the buffer base, the pressing plate relaxation chamber and the bolt stretching pool are arranged, the flexible fire clay contact between the buffer base and the brick arrangement is ensured at all times, the problems of the bending deformation of the inner slide plate cavity plate, the plate surface crack fracture of the inner slide plate, the slide plate clamping steel and the like caused by the over-high installation of the brick arrangement and the brick arrangement pressing plate are solved, and the stability of the mechanism surface pressure is obviously improved, the converter slag blocking device is safe and long in service life, stable in operation, low in comprehensive cost and simple in operation and maintenance.

The application belongs to the technical field of batteries, and discloses a battery monomer, which comprises a pole group and a shell, the pole group comprises a first pole group body and two second pole group bodies, the two second pole group bodies are connected to the two sides of the first pole group body in a first direction, the two sides of the first pole group body in a second direction are protruded from the two sides of the second pole group body in the second direction, a first limiting step is formed between the first pole group body and the second pole group body, the shell is provided with a containing cavity, the first pole group body and the second pole group body are located in the containing cavity, the shell comprises two limiting walls which are oppositely arranged along the second direction, each limiting wall is provided with a second limiting step on the two sides in the first direction, the step riser of each second limiting step is respectively in abutment with the step riser of a corresponding first limiting step, and the step tread of each second limiting step is respectively in abutment with the step tread of a corresponding first limiting step. The battery monomer can reduce the probability of displacement of the pole group in the shell.

The utility model relates to building construction device technical field discloses a building pile driver for building engineering construction, including vertical sliding slot column, the inside sliding connection of vertical sliding slot column has iron quality sliding block, and the right side surface fixed connection of iron quality sliding block has connecting rod, and the right -hand member fixed connection of connecting rod has hammerhead, and the upper surface fixed connection of connecting rod has the vertical board, and the right side fixed connection of vertical board has the slope, and the left side surface of vertical board is equipped with the slot, and the inside spigot of slot has the mounting block, and the left side fixed connection of mounting block has the fixed frame, and the inside rotation connection of fixed frame has the gyro wheel. In the utility model, the cooperation of the vertical board and the slope that set up can improve the use intensity of connecting rod and hammerhead, reduce the possibility that connecting rod appears bending deformation, and further improve the use stability of hammerhead, and the cooperation of the slot, the mounting block, the fixed frame, the gyro wheel and other structures that set up can further improve the stability when supporting the limit.

This utility model relates to the field of workpiece heat treatment technology, specifically a tooling for shaft heat treatment. The supporting tray is rectangular and has a first honeycomb mesh-like tie rod. The carrying tray is also rectangular and has a second honeycomb mesh-like tie rod. At least one intersection of the second mesh of the second honeycomb mesh-like tie rod has a mounting hole for the tapered section and the main shaft section to pass through sequentially, so that the edge of the mounting hole supports the stage. One end of the apex support is connected to the supporting tray near the apex, and the other end is connected to the carrying tray near the apex. One end of the center support is connected to the center point of the supporting tray, and the other end is connected to the center point of the carrying tray. This utility model supports and limits the shaft at two positions, reducing shaft bending deformation after heat treatment, reducing the use of correction equipment, and thus improving the pass rate of shaft heat treatment.

This invention relates to the field of aluminum alloy welding technology, specifically a dual-gun synchronous magnetron welding process for long aluminum alloy vehicle body components. The process includes setting a first GTAW welding torch on the front side of the workpiece and a second GTAW welding torch on the back side, with the tungsten electrode tips of the two torches offset along the weld direction. The first GTAW welding torch is equipped with a first magnetron coil, and the second GTAW welding torch is equipped with a second magnetron coil. The first and second alternating magnetic fields operate in opposite phases. This invention controls the phase relationship of the two alternating magnetic fields, causing the front and back magnetic fields to operate in opposite phases. This allows the two magnetic fields to act at staggered times, avoiding the superposition and enhancement effect of magnetic fields. When using the opposite-phase scheme, the front magnetic field promotes the front arc to swing to the left during the positive half-cycle, while the back magnetic field causes the back arc to swing to the corresponding side during the negative half-cycle. The two arcs are staggered in time, and their respective magnetic lines of force do not superimpose in the same direction, thus suppressing arc interference.

The utility model discloses an anti -impact sign lamp, including protection shell and the light guide plate of setting in the protection shell, be equipped with the pattern of openwork on the protection shell, it is characterized by: the filling portion of being equipped with the convex and can even light of light guide board, the filling portion is located in the pattern to thereby can improve the anti -impact ability of light guide board at the pattern place. When the impact hammer is impacted at the pattern place, the filling portion can reduce even fill the gap between the pattern and the test bench surface, thereby reduce the bending deformation of light guide board at the pattern place, thereby improve the anti -impact ability of light guide board at the pattern place, reach the test standard, thereby improve the qualified rate of product.

The utility model discloses a sounding unit, which comprises a magnetic circuit assembly, a voice coil, a diaphragm assembly and a framework, the magnetic circuit assembly comprises an upper yoke, a lower yoke, a central magnetic structure and an edge magnetic structure, the central magnetic structure and the edge magnetic structure are respectively arranged on the lower yoke, and the upper yoke covers the central magnetic structure and the edge magnetic structure. The magnetic circuit assembly is provided with a magnetic gap, the magnetic gap surrounds the central magnetic structure, the magnetic gap is located between the upper yoke and the lower yoke, the magnetic circuit assembly is provided with a first magnetic loop and a second magnetic loop which are opposite in direction, the first magnetic loop penetrates through the upper portion of the magnetic gap, and the second magnetic loop penetrates through the lower portion of the magnetic gap. The second magnetic loop passes through the lower part of the magnetic gap; the voice coil is located in the magnetic gap; the framework comprises an inner mounting part, a connecting part and an outer mounting part which are connected in sequence, the inner mounting part is connected with the voice coil, the outer mounting part is connected with the transition part, and a reinforcing boss is arranged on the connecting part. The sounding unit is stable in structure and excellent in performance.