13results about How to "Solve abnormal noise" patented technology

The utility model discloses a shock absorber oil seal cover and air spring, shock absorber oil seal cover includes: cover body, it includes the vertical section of tubular, the horizontal section that forms annularly from the inside wall of the upper end portion of vertical section inwardly contracts, the inner peripheral surface of vertical section is equipped with several annular distribution's inner bulge interval, the central hole that communicates to the vertical section is formed in the middle of horizontal section, and the inner air passage for airflow is formed between the inside wall of vertical section and the two inner bulges of adjacent to several, inner lining ring is embedded in the inside of horizontal section and is arranged coaxially with horizontal section, the buffer ring of oil seal cover upper end surface can effectively solve the problem that the abnormal sound will be produced when the buffer block hits on the oil seal cover.

The invention discloses a method for quantifying impact force at an outlet of a back cavity of a vehicle-mounted open subwoofer, and relates to the technical field of vehicle engineering, and the method comprises the steps: constructing an acoustic simulation model, building a computational domain comprising a structural domain, an internal fluid domain and an external fluid domain, and generating a grid; setting medium parameters and boundary conditions, and applying excitation to a loudspeaker diaphragm; solving a sound field based on an acoustic control equation, and calculating a particle velocity vector by using a momentum conservation principle; extracting the maximum airflow velocity value of the section of the outlet of the inverter tube in a preset frequency range as a key quantitative index; and converting the index into a dynamic pressure load or a matching arrangement database, and outputting arrangement guidance data. According to the method, the acoustic simulation data are converted into the hydrodynamic indexes, so that quantitative evaluation of the airflow impact force of the inverter tube is realized, the arrangement design of peripheral parts is effectively guided, and abnormal sound and structural failure risks are avoided.

The utility model discloses a hinge door plate with dustproof and self-lubricating functions, which comprises a door plate, an air circulation mechanism and an observation mechanism, one side of the door plate is provided with a connecting mechanism, the connecting mechanism comprises a first fixing plate, one side of the first fixing plate is fixedly connected with a first connecting piece, the first connecting piece is internally provided with a first sliding chute, and the first sliding chute is provided with a second sliding chute. A first sliding block is arranged in the first sliding groove. Through the arrangement of the connecting mechanism, the sealing block is tightly attached to the first connecting piece and the second connecting piece, the gap between the door plate and the door frame is filled with the sealing gasket, the gap at the hinge connecting position is blocked through elastic deformation of rubber, and dust is prevented from entering a cab; lubricating grease is injected into the second sliding groove through the groove opening, the grease can flow to the first sliding groove along the sliding grooves to cover the surfaces of the first sliding block, the second sliding block and the connecting column, friction between parts can be reduced, abrasion is reduced, the hinge is prevented from rusting, and the problems of abnormal sound and blocking during door opening and closing are solved.

This utility model discloses a horizontal drive assembly for an automotive seat, including a motor and a housing. A worm gear and a helical gear are housed within the housing. The motor is connected to the worm gear via a transmission drive to drive its rotation. The worm gear meshes with the helical gear to transmit the worm's rotation to the helical gear, causing it to rotate. Two bushings are arranged opposite each other within the housing. Shoulders are designed at both ends of the helical gear, and these shoulders are inserted into the two bushings to limit and fix the helical gear while allowing it to rotate relative to the bushings. Two collars are also designed at both ends of the helical gear, enclosing the ends of the helical gear teeth and positioned between the shoulders and the teeth. The outer diameter of the shoulders is smaller than the outer diameter of the collars. When the helical gear rotates, the outer end face of the collars can directly contact the inner end face of the corresponding bushing. This utility model effectively avoids direct friction between the irregular end face of the helical gear and the bushings, simplifies the component structure, avoids the abnormal noise problem caused by friction of metal gaskets, and has significant economic benefits.

The application relates to the technical field of engineering design simulation, and provides a power battery box cover pressing test simulation method, device, equipment and medium, the method comprises the following steps: acquiring frame design parameters and cover design parameters of a power battery box; generating a power battery box simulation frame according to the frame design parameters; generating a power battery box simulation cover by simulating cover stamping on a preset flat plate cover material according to the cover design parameters; assembling the power battery box simulation frame and the power battery box simulation cover to obtain a power battery box simulation model; and performing pressing simulation on the power battery box simulation model according to preset pressing parameters to obtain a pressing simulation result. The method can quickly predict whether the battery pack has a pressing rebound abnormal sound problem before the battery pack is produced and manufactured, has high analysis precision for the abnormal sound problem of the battery pack, and can reduce the abnormal sound analysis cost.

The utility model relates to a battery box body, a battery pack and a vehicle. The battery box body comprises a battery box body and a bottom protection plate arranged at the bottom of the battery box body; the bottom of the battery box body is provided with a first area and a second area surrounding the periphery of the first area; the first area is provided with a connecting structure, the connecting structure is at least one of a magnet, a hook-and-loop fastener and a snap fastener, and the battery box body is connected with the bottom protection plate through the connecting structure in the first area and connected with the bottom protection plate through a bolt in the second area. Through the structural design, a bolt connection structure between the first area at the bottom of the battery box body and the bottom protection plate is reduced or cancelled, and the requirement on the wall thickness of part of the structure of the battery box body when the bolt connection structure is arranged is reduced, so that the size is reduced, the weight is reduced, and the material cost is reduced; the energy density of the battery pack can be increased, and the lightweight design can be realized.

The utility model discloses an anti-radiation installation assembly and an electric cooker. The anti-radiation installation assembly comprises a base and an anti-radiation plate, the base is provided with a connecting column, the anti-radiation plate is provided with a special-shaped hole corresponding to the connecting column, the edge of the special-shaped hole extends towards the center of the hole to form at least three deformable clamping jaws, and the clamping jaws are assembled on the side wall of the connecting column in an interference mode. According to the utility model, the special-shaped hole of the radiation-proof plate is aligned with the connecting column of the base, the clamping jaw deforms when being extruded by the side wall of the connecting column, and then the clamping jaw is tightly clamped on the side wall of the connecting column in an interference assembly mode, and the interference assembly mode utilizes the deformability and the elastic restoring force of the clamping jaw, so that the radiation-proof effect is improved. According to the anti-radiation plate, the clamping jaws and the connecting columns are tightly connected, the connecting strength between the anti-radiation plate and the base is enhanced, the problem of looseness is effectively avoided, the stability of the anti-radiation plate in the equipment operation process is ensured, and the problem of abnormal sound generated by resonance is solved.

The invention provides a vehicle body side structure and a vehicle. The vehicle body side structure comprises a doorsill beam extending in the front-back direction of the whole vehicle and a door ring connected with the doorsill beam. The doorsill beam comprises an inner side beam body and an outer side beam body which are connected together, the inner side beam body is made of a steel metal plate, the cross section of the outer side beam body is of a multi-cavity energy absorption structure, a doorsill beam cavity is defined by the inner side beam body and the outer side beam body, and a supporting structure located in the doorsill beam cavity is arranged on the inner side beam body and / or the outer side beam body. The door ring is of an open structure with the bottom open, a plurality of connecting ends which are arranged at intervals in the front-back direction of the whole vehicle are formed, and the connecting ends are connected to the doorsill beam. According to the vehicle body side structure, the structural strength of the threshold position can be improved, the energy absorption effect during collision of the side face of the vehicle body can be improved, meanwhile, the vehicle body forming and assembling difficulty can be lowered, and the whole vehicle manufacturing cost can be lowered.

The utility model relates to a kind of glass lifter bracket structure, belong to the component of automobile glass lifter.The relative arrangement of hanging line groove one and hanging line groove two is arranged on bracket body, cable joint spring one is set in hanging line groove one, isolation line groove is located at the front end of the outgoing wire direction of hanging line groove two, buffer block is integrally injection molded with bracket body.The advantages are novel structure, the abnormal sound and fracture problem generated in the running process of glass bracket caused by the lap joint of two cables is solved by adopting isolation line groove;By the relative arrangement of hanging line groove, the problems of cable hanging error, leading to lifting failure, rework and scrap are solved;By using the buffer block integrated with bracket, the problem of abnormal sound in the lower support point position of bracket caused by the falling of original buffer block during use is solved.The noise reduction, fatigue resistance, wear resistance and durability of glass lifter structure are improved.

The utility model discloses a hot water machine relates to heat transfer technical field, wherein, hot water machine includes the casing, the protective net and the elastic part, the casing one side part is first side part, and the first side part of casing is provided with the opening, and the opening has the first side wall and the second side wall in the first direction relative, and the first side wall is provided with the cooperation portion, and the second side wall is provided with the mounting hole, the protective net is cooperated with the opening, and the protective net includes the net pole along the first direction extension, and the both ends of net pole correspond for first end and second end, and the first end of net pole is cooperated with the cooperation portion, and the second end is cooperated with the mounting hole, the elastic part sets up between the side of second side wall and the second end of net pole, to with the side of net pole elastic abut, carries out the radial location to net pole, restricts the amplitude of the vibration of net pole and produces the transfer path of the vibration energy to the casing, reduces the abnormal sound because of the component collision or friction and produces.

The invention discloses a hydraulic bushing and a front lower control arm. The hydraulic bushing comprises an inner pipe, an elastic main spring, two runner arc plates and an outer pipe which are coaxially arranged, the elastic main spring is arranged outside the inner pipe in a sleeving mode, and the elastic main spring and the inner pipe form an integrated structure. The two runner arc plates are clamped outside the elastic main spring and are in interference fit with the elastic main spring, and an inner cavity is formed between the runner arc plates and the elastic main spring; the runner arc plate is sleeved with the outer pipe, an outer cavity is formed between the runner arc plate and the outer pipe, and after the inner cavity and the outer cavity are filled with fluid, the outer pipe is connected with the runner arc plate in a sealed mode; a first liquid channel is arranged on the side, facing the outer pipe, of each flow channel arc plate. A first flow channel hole is formed in the first liquid channel, and a decoupling film is arranged on the side, opposite to the first liquid channel, of the first flow channel hole; a plurality of protruding structures are arranged on the surface of at least one side of the decoupling film. The invention discloses a hydraulic bushing and a front lower control arm. The problem that abnormal sound is generated by a hydraulic bushing in an existing suspension system under the vibration working condition is solved.

The utility model discloses a drawer refrigerator unlocking mechanism which comprises an outer box body and a drawer, a storage cavity is arranged in the outer box body, the drawer is movably inserted in the storage cavity, a lock tongue is arranged on the front side of the outer side face of the drawer, a lock catch assembly capable of being connected with the lock tongue in an abutting and locking mode is arranged on the front side of the inner side face of the outer box body, and a lock catch is arranged on the outer box body, the unlocking assembly is arranged at the front end of the outer box body and enables the lock catch assembly and the spring bolt to be unlocked when the unlocking assembly moves, the driver is arranged on the outer box body, the output end of the driver is matched with the other end of the unlocking assembly to drive the unlocking assembly to move, the unlocking mechanism is arranged at the front end of the outer box body, and the size chain length of the locking mechanism is greatly shortened. The change of the clearance surface difference of the product under the condition of thermal expansion and cold contraction is reduced, the abnormal sound problem is avoided, and maintenance is convenient.