172results about How to "Eliminate abnormal noise" patented technology

The invention discloses a DVL-assisted SINS robust on-moving initial alignment method. The DVL-assisted SINS robust on-moving initial alignment method comprises the following steps of step (1), acquiring real-time sensor data; step (2), establishing a vector apparent motion parameter equation; step (3), on the basis of establishing the vector apparent motion parameter equation, estimating a parameter matrix through adaptive robust Kalman filtering; step (4), establishing reconfiguration vectors based on estimated parameters; step (5), through an optimal base quaternion attitude determining method, computing the error angle between a determined attitude and a real attitude; step (6), setting an initial alignment moment as M and a real-time data acquiring moment as k, if k=M, outputting an initial alignment result and completing an initial alignment process, and if k<M, determining that the initial alignment process is not completed, and repeating the above steps of (1) to (5) until theinitial alignment process is completed. The DVL-assisted SINS robust on-moving initial alignment method solves the problems of poor alignment precision and divergent alignment processes when system measured noise is abnormal.

The invention relates to the field of mechanical steering gears of automobile steering systems, and provides an abnormal sound prevention structure of an automobile mechanical steering gear. The abnormal sound prevention structure comprises a steering gear body shell, a small gear shaft, a gear shaft fixing bearing, a gear rack, a clearance adjusting and locking nut and a clearance adjusting nut, the small gear shaft is fixedly arranged in the steering gear body shell through the gear shaft fixing bearing, the outer side of the gear rack is pressed by one end of a gear rack supporting press block, the clearance adjusting nut is screwed on the steering gear body shell and compresses a spring, the other end of the spring is compressed bythe other end of the gear rack supporting press block, two annular grooves are formed in the circumferential face, matched with the steering gear body shell, of the gear rack supporting press block, and are provided with an O-shaped rubber ring I and an O-shaped rubber ring II respectively, the end face, opposite to the clearance adjusting nut, of the gear rack supporting press block, is provided with a third annular groove, and an O-shaped rubber ring III is arranged in the third annular groove. Through the abnormal sound prevention structure, performance requirements for the automobile steering systems can be met, and abnormal sounds of a traditional mechanical steering gear can be reduced or even removedcompletely.

The invention relates to car seats, in particular to a car seat with an automatic folding and turning function. The car seat mainly comprises a backrest tube framework (1), a backrest and cushion linkage unlocking mechanism (2), a cushion tube framework (4), a turning mechanism (6) and a cushion turning mechanism (7). The backrest tube framework (1) is connected with the cushion tube framework (4). The backrest and the backrest and cushion linkage unlocking mechanism (2) are disposed on the backrest tube framework (1). The turning mechanism (6) is disposed on the cushion tube framework (4). The cushion turning mechanism (7) is disposed on the cushion tube framework (4). The car seat has the advantages that the car seat satisfies the requirements of national mandatory laws and regulations, get on and get off convenience of passengers is increased, the safety performance level of a whole car is increased, onerous operation steps are eliminated, performance level of the whole car is increased, user experience is increased, and problems of seat loosening and abnormal sounds are solved by means such as backrest coil spring assisting design.

The invention discloses an automobile spare tire installing structure, which comprises a spare tire pool arranged on a back floor, wherein the spare tire pool comprises a spare tire pool front part and a spare tire pool back part; the spare tire pool front part is of a circular arc structure; the spare tire pool back part extends out in the tangential direction of the circular arc of the spare tire pool front part; the cross section of the spare tire pool back part is in a U shape; an installing support frame used for installing an automobile spare tire is arranged in a connecting position of the spare tire pool front part and the spare tire pool back part; structure reinforcing structures are arranged on the periphery of the installing support frame and at the spare tire pool front part and the spare tire pool back part. The automobile spare tire installing structure has the advantages that the carrying capability is high; the structure is simple; the manufacturing process is simple; good modal stiffness performance is realized; the light-weight requirements can be met.

The invention provides a motor torque control method, a device, storage medium, and a vehicle. A required torque and an actual torque of a motor can be acquired, and when the required torque is opposite from the actual torque, the actual torque of the motor can be moved towards 0, and when the actual torque of the motor reaches 0, the actual torque of the motor is moved towards the required torque. The torque of the motor is prevented from being directly switched between the positive torque and the negative torqued, and the abnormal noise of the transmission shaft of the motor can be eliminated, and therefore driving comfort can be improved, and user experience can be improved.

An automobile abnormal sound monitoring and diagnosing device is provided, and belongs to the technical field of automobiles. The device overcomes the problem that only sounds of different zones of automobiles are memorized, and automobiles are not provided with a preliminary diagnosis function in the prior art. The device includes an automobile storage battery supplying components with electric power, a sound collecting module for collecting automobile sound, and a controller used for respectively comparing and matching the automobile sound collected by the sound collecting module with typical abnormal sound cases memorized in advance inside. The controller is connected to an automobile CAN bus network for transmitting automobile running information signals. The sound collecting module is connected to the controller also used for memorizing abnormal sound after the collected automobile sound is successfully matched with abnormal sound parameters memorized inside and corresponding automobile conditions when the abnormal sound occurs. The device monitors and records the abnormal sound of a local part of an automobile under present automobile running conditions and performs preliminary diagnosis.

The invention discloses a thermal expansion valve, belongs to the technical field of vapor compression-type refrigerating, and is suitable for an automobile air conditioner system. The thermal expansion valve mainly comprises a thermal head 1, a valve body 2, a valve rod 3, a steel ball base assembly 4, an adjustment spring 5 and the like. The thermal expansion valve is characterized in that the steel ball base assembly 4 comprises a steel ball 41, a steel ball base 42 and a damping spring 43. When a driver suddenly starts the automobile air conditioning system, the steel ball 41, the steel ball base 42 and the damping spring 43 constituting the steel ball base assembly 4 have constitute a whole though the valve rod 3 and the steel ball base assembly 4 may disengage, and the damping spring 43 is in interference fit with a valve hole 21. By means of the inhibition function of the damping spring 43, the situation that the steel ball base assembly 4 and the adjustment spring 5 vibrate due to external excitation and disturbance is not prone to occurring, and accordingly the thermal expansion valve cannot sound abnormally.

The invention belongs to the technical field of automobile parts and particularly relates to a novel vehicle-mounted vibration and radiation headrest surrounding sound system. At least one resonance box capable of making sounds is arranged in a headrest body. The space between the resonance boxes and the headrest body is filled with filler. The resonance boxes are embedded in the headrest body, make sounds independently and have a good low-frequency sound effect.

A mobile terminal and a housing assembly thereof are provided. The housing assembly includes a middle frame and a battery cover. One side of the middle frame is provided with a battery accommodation groove, and the battery cover is arranged on the side of the middle frame with the battery accommodation groove; the battery cover comprises a cover pressing part and a buckling part, wherein the buckling part is integrally arranged along the edge of the cover pressing part, the cover pressing part is arranged in the battery receiving groove, and the buckling part is engaged with the side edge of the middle frame; a support rib is arranged at the opposite side edge positions of the battery accommodation groove, and the support rib holds the cover pressure part of the battery cover so as to forma deformation accommodation gap between the cover pressure part and the middle frame. The housing assembly enables the mobile terminal to achieve wire support in the thickness direction, a deformation accommodation gap is formed between the battery cover and the middle frame. When the battery cover is deformed due to external force, the deformation accommodation gap can be used to accommodate thedeformation amount of the battery cover, thereby avoiding large-area contact friction between the battery cover and the middle frame, and effectively eliminating abnormal noise of the battery cover due to external force.

The invention provides a transmission control mechanism, and relates to parts of motor vehicles. The transmission control mechanism solves the problem that when an existing transmission control mechanism is used, and an engine is in an idling condition and an urgent acceleration condition, an existing transmission can generate abnormal sounds. The transmission control mechanism comprises a bulb piece and a selecting shifting gear shaft, wherein one end of the bulb piece is arranged inside a clamping groove of the selecting shifting gear shaft in a clamped mode, the bulb piece and the selecting shifting gear shaft are respectively arranged inside a shell body of a transmission, vibration reducing pads are arranged in gaps between the bulb piece and an upper end cover of the shell body, and a vibration reducing isolating sleeve is arranged inside the clamping groove of the selecting shifting gear shaft.

The invention discloses a buckle for an automobile interior decoration, which comprises a buckle body. The outer sides of the buckle body are respectively provided with anti-falling undercut protrusions. The lower part of the anti-falling underturn protrusion is an outer clamping part. A pair of ribs are provided on the inner side of the buckle body, the ribs are provided with anti-falling barbs, and the ribs or the inner side of the buckle body are provided with clamping bosses, and the anti-falling barbs are fixed on the target connecting piece. The mounting holes or mounting protrusions fix the target connecting piece to prevent falling off. Compared with the traditional metal shrapnel, the present invention completely solves the technical problems of shrapnel shaking, abnormal noise, loose connection and difficult maintenance caused by the high energy consumption and poor welding risk of traditional metal shrapnel hot-melt welding. Undercut protrusions, anti-falling barbs and clamping bosses can firmly connect the target connecting parts, which are easy to install and easy to replace.

The invention discloses a method for judging if abnormal noise is caused in rotary vane compressors. The method for judging if the abnormal noise is caused in the rotary vane compressors includes: S1,collecting information of an abnormal sound site, and recording noise frequency of the compressors which send out abnormal noise and noise frequency of the compressors which do not send out the abnormal noise; and S2, performing abnormal noise reappearing test which includes the steps: S2.1, preparing needed equipment, instruments and samples for the test; S2.2: respectively performing the abnormal noise reappearing test on the compressors which send out the abnormal noise and the compressors which do not send out the abnormal noise, setting test conditions according to the collected information of the abnormal sound site, collecting test noise through a microphone sensor, and analyzing the test noise through a noise analysis meter; S2.3, analyzing the recorded noise frequency of the compressors which send out the abnormal noise and the recorded noise frequency of the compressors which do not send out the abnormal noise; and S2.4, confirming abnormal noise problem scope according to analysis results of the step S2.2 and the step S2.3, and confirming criterion scope of the compressors which send out the abnormal noise.

The present invention provides a one-way bearing assembly comprising a rotating ring and a fixing ring which are coaxially arranged; a plurality of wedges arranged between the rotating ring and the fixing ring; and an unlocking mechanism used to cause the rotating ring to switch between a locked state and an unlocked state under driving of a switch. The rotating ring is rotatable in a first direction when the rotating ring is in the locked state, but is non-rotatable in a second direction opposite the first direction; and when the rotating ring is in the unlocked state, the rotating ring is rotatable in the first direction and in the second direction. The present invention also provides an armrest box and a cup holder having the one-way bearing assembly. The one-way bearing assembly of thepresent invention can be stopped at any desired position by the one-way bearing and can unlock the one-way bearing in response to the user's needs.

The invention discloses a buffer piston energy accumulator. According to the buffer piston energy accumulator, an end cover of a cylinder body is arranged at one end of the cylinder body, a piston is arranged in the cylinder body and located at one side of the end cover of the cylinder body, an oil discharge opening is formed in the circle center of the end cover of the cylinder body and penetrates through the end cover of the cylinder body, one side, opposite to the end cover of the cylinder body, of the piston is provided with a boss, the surface, opposite to the piston, of the end cover of the cylinder body is provided with a buffer hole, a throttle plug is arranged in the buffer hole, the side face of the end cover of the cylinder body is provided with a process hole, and a process plug is arranged in the process hole. When the piston moves towards the end cover of the cylinder body, the boss plugs up the oil discharge opening to enable oil to flow to the oil discharge opening through the throttle plug, and the section area of the throttle plug is far smaller than that of the oil discharge opening, so that the movement speed of the piston is reduced, and the buffer effect is achieved. The buffer piston energy accumulator is simple in structure, adjustable in buffer effect and low in manufacturing cost, eliminates abnormal sounds of the hydraulic system generated when the piston hits against the end cover of the cylinder body, eliminates hydraulic impact generated when the piston hits against the end cover of the cylinder body and prolongs the service life of the energy accumulator and sealing pieces.

The invention discloses an installing structure for a motorcycle front mask, a front mask decoration plate and a middle protection plate. The front mask decoration plate (A) is positioned in front of the front mask (B), the middle protection plate (C) is positioned at the back side of the front mask (B), the front mask decoration plate and the front mask as well as the front mask and the middle protection plate are in pairwise connection, the front mask decoration plate, the front mask and the middle protection plate are connected through self-tapping screws, and a mode of combining rigid connection and soft connection is adopted between the front mask decoration plate and the front mask. The installing structure has the characteristics that the installation structure is simple, the stability is good, the vibration is small, the integral feeling is strong, the appearance quality is good, the mounting and the dismounting are convenient and fast, and the like.

The invention relates to a ridging die for a damping package inner assembly of a vehicle exhaust system. The ridging die comprises a ridging assembly and a clamping tool assembly, wherein the ridgingassembly comprises a ridging movable plate, positioning rings, pull rods, a ridging fixed plate, outer sleeve rods, positioning mechanisms, cone rods, clamping and locking die bodies and end clampingheads, and the clamping tool assembly comprises a tool base plate, tool fixed plates, tool movable plates, pipe fitting positioning blocks, profiling plates, guide pillars, guide sleeves, oil cylinders, oil cylinder connecting rods and floating joint bases. By means of the ridging die, part of metal of a damping pipe is stretched and deformed, and the inner assembly assembling process of fixing two parts of a clapboard and the damping pipe is achieved.

The invention relates to the field of automobiles and automobile part manufacturing, in particular to a manufacturing method for a main beam capable of improving the overall NVH capacity of an automobile. The maximum specific content of the lubricating oil and the extremely low cost are defined, and after heat treatment is carried out in the manufacturing process of the main beam, a special oil film layer is formed on the inner wall of the main beam to separate the front layer from the rear layer which are attached to each other, so that abnormal sounds caused by the main beam structure are basically eliminated. The method comprises the following steps that 1, a corresponding main cross beam is manufactured, and the structure of the main cross beam mainly corresponding to the technical range comprises a front plate and a rear plate, and the re-extrusion expansion section of a lower beam is V-shaped, C-shaped, U-shaped, arc-shaped, L-shaped, U-shaped, L-shaped and the like; the distancebetween the folded top plate overlapping position of the front plate and the rear plate and the inner wall of the expanded lower plate is not equal to 0 mm but smaller than 2-0.2 mm of the contact distance in the whole top plate overlapping position or in the most central part of the top plate overlapping position.

A brush assembly has a brush, a brush cage, and a spring. The spring is a constant force spring having two coil portions and a connecting portion. The connecting portion the brush are together received in the brush cage. The brush has a contact end arranged to make sliding contact with a commutator and a second end remote from the contact end against which the spring applies its force, to urge the brush out of the brush cage. A hook is formed at each of two opposite sides of the brush cage, at a first end portion of the brush cage adjacent the contact end of the brush. The coil portions respectively engage the hooks. The hooks extend at different angles to a corresponding outer surface of the brush cage.