170 results about "Impact noise" patented technology

The invention discloses a rock mass fracture early warning method for a hydraulic tunnel, belongs to the technical field of tunnel safety monitoring, and can solve the problem that an existing method cannot specifically recognize isolated impact noise and rock mass real fracture signals in the construction period of the hydraulic tunnel under the background of strong noise. The method comprises the following steps: S1, acquiring an original micro-seismic signal synchronously acquired by a sensor array in a hydraulic tunnel; s2, detecting a micro-seismic event from the original micro-seismic signal to obtain an event signal set, and determining a reference channel signal according to the event signal set; s3, extracting cross correlation coefficient peak values of event signals of each channel in the event signal set and reference channel signals, and counting the number of channels of which the cross correlation coefficient peak values exceed a cross correlation coefficient threshold value as the number of coherent channels; and S4, calculating a frequency band energy ratio of the reference channel signal, and generating a rock mass fracture early warning signal when the number of coherent channels and the frequency band energy ratio meet preset conditions. The method is used for rock mass fracture early warning of the hydraulic tunnel.

The utility model discloses a shock absorption and noise reduction structure of a pedal simulator, which comprises an upper cover and a lower cover which are connected in an up-down sliding manner, and a bulge is arranged in the upper cover. The plug body assembly is arranged in a containing cavity formed by the upper cover and the lower cover and can move along the shaft, and the friction block is installed on the plug body assembly and abuts against the position between the inner side wall of the upper cover and the plug body assembly. The elastic assembly comprises a first elastic part and a second elastic part which are arranged on the upper side and the lower side of the plug body assembly respectively. During braking, the lower cover moves downwards, and the protrusions abut against the plug body assembly to absorb shock and reduce noise. A buffering gasket is arranged in the plug body assembly, and a buffering part is pressed into the plug column in an interference mode through a T-shaped rubber part or integrally formed with the plug column in an injection mode. According to the structure, impact noise generated by direct contact of the upper cover and the piston during rapid treading is effectively reduced, the driving comfort is improved, rigid collision of parts is reduced, and the service life of equipment is prolonged.

The invention relates to the technical field of fluid mechanical fault diagnosis, and discloses an emulsion pump fault intelligent diagnosis method and system based on multi-dimensional entropy feature fusion, and the method comprises the steps: constructing a multi-dimensional physical field state monitoring space, and synchronously collecting vibration acceleration, outlet pressure and flow time sequence signals; the method comprises the following steps: performing adaptive variational mode decomposition and effective sensitive component screening reconstruction on a vibration signal, calculating a normalized vibration quantile permutation entropy through phase-space reconstruction and quantile mapping, extracting a pressure fluctuation entropy and a flow pulsation variance, fusing the pressure fluctuation entropy and the flow pulsation variance into a multidimensional fault feature vector, inputting the multidimensional fault feature vector into a multi-classification support vector machine, and outputting an operation state label; executing hierarchical closed-loop control; according to the method, through quantile mapping and multi-physics field fusion, the problems of entropy value feature distortion and liquid-machine coupling weak fault feature masking caused by non-Gaussian impact noise are effectively solved, and the fault diagnosis robustness and accuracy of the emulsion pump under complex working conditions are improved.

The invention relates to the technical field of artificial intelligence, and discloses a BCM module cooperative control method based on voice instruction recognition in a vehicle-mounted high-noise environment, and the method comprises the following steps: collecting original voice instruction data and vehicle state parameter data in the vehicle-mounted high-noise environment; performing voice signal preprocessing in a noise environment based on the original voice instruction data to generate de-noised voice instruction data; according to the method, the engine noise and the wind noise steady-state background noise are filtered out through multi-level noise suppression processing combining adaptive filtering and spectral subtraction, residual noise elimination is carried out for sudden impact noise, and the definition of voice signals is improved. Meanwhile, through a voice activity detection algorithm, a detection threshold is dynamically adjusted according to vehicle state parameters, an effective voice segment and a noise segment can be separated, the accuracy of voice feature extraction in a complex time-varying noise environment is ensured, and thus the robustness and reliability of voice instruction recognition are improved.

The utility model discloses a speed limiter steel wire rope anti-shaking device for an elevator. A speed limiter steel wire rope is provided with a first linear section close to a lift car guide rail and a second linear section away from the lift car guide rail. The anti-shaking device comprises a fixing support, a connecting support and a U-shaped piece. The fixed bracket is arranged on a car guide rail; the connecting support is arranged on the fixing support and stretches across the first linear section and the second linear section. The connecting support is provided with a first buffer pad facing the first linear section. The two free ends of the U-shaped piece are connected with the connecting support, and a limiting space is formed between the U-shaped piece and the connecting support. The second linear section is accommodated in the limiting space; the U-shaped piece is sleeved with a buffering sleeve. And a second buffer pad is arranged on the side surface, facing the limiting space, of the connecting bracket. According to the utility model, the shaking of the speed governor steel wire rope on the non-safety tongs lifting side can be limited, the collision noise can be reduced, and the shaking of the speed governor steel wire rope on the safety tongs lifting side can be limited, and the collision noise can be reduced.

This utility model relates to the field of automotive engine manufacturing technology and discloses a sprocket for an automotive engine. It includes a sprocket body with a motor shaft at its center for rotating the sprocket body. Two limiting blocks are fixedly connected to the inner wall of the sprocket body near the motor shaft, and the sprocket body is tightly connected to the protrusions on the outer surface of the motor shaft via the two limiting blocks. An anti-loosening component is provided on one side of the sprocket body to prevent the motor shaft from loosening, and the anti-loosening component is sleeved on the outside of the motor shaft. In this utility model, the chain teeth mesh with the engine chain, and the top arc-shaped protrusion fully engages with the chain rollers, improving meshing accuracy, reducing impact noise, and restraining the chain to prevent derailment. The oblique grooves between adjacent chain teeth guide the flow of lubricating oil during operation, improving tooth surface lubrication and assisting in heat dissipation. The anti-loosening component effectively inhibits the loosening of the motor shaft, ensuring transmission stability.

This application discloses a novel noise reduction structure for a pressure cooker, comprising: a noise reduction seat with openings at both the top and bottom, and a noise reduction cover that can be opened and closed and is disposed above the noise reduction seat. The noise reduction seat and the noise reduction cover are fitted together to form a receiving cavity covering the pressure vent cap. The noise reduction cover has a vent hole, and the inner sidewall of the noise reduction cover protrudes towards the receiving cavity corresponding to the position of the vent cap, forming a reflux wall. This embodiment, through the enveloping receiving cavity formed by the noise reduction seat and the noise reduction cover, completely covers the pressure vent cap within a closed space, forming a physical barrier layer to directly weaken noise propagation. Simultaneously, the reflux wall forces steam to swirl downwards, reducing steam velocity and impact energy before it is discharged outwards through the vent hole. This dual effect attenuates high-frequency impact noise by over 40%, and the compact integrated structure avoids the volume defects of traditional screw-on devices.

The invention provides an intelligent denoising processing method for signals of an ocean multi-parameter precision measuring instrument, and belongs to the technical field of intelligent denoising processing for the signals of the ocean multi-parameter precision measuring instrument. Noise sub-bands are eliminated according to sub-band signal-to-noise ratio evaluation indexes, signals are reconstructed, a weighted undirected graph is constructed according to partial correlation coefficients among sensors, and joint sparse optimization with physical smoothness constraint is executed in an atlas domain; and finally, multi-channel parallel denoising and time sequence alignment output are realized through a work stealing scheduling strategy. The technical problem that full-band adaptive decomposition, physical priori constraint drift compensation, impact noise accurate separation and multichannel physical consistency collaborative optimization cannot be simultaneously realized in a complex marine environment in a multichannel sensor signal denoising process is solved.

The invention discloses a direct-acting electromagnetic valve, and belongs to the technical field of vehicle suspension systems. The electromagnetic valve comprises a valve body assembly, a static magnetic assembly, a valve seat assembly, a movable magnetic assembly and an electromagnetic driving assembly. The key point is that a damping limiting structure is arranged between the peripheral side of the moving magnetic assembly and the inner wall of the valve body assembly. When the electromagnetic valve is powered on and opened, and the movable magnetic assembly moves to the maximum opening position, the damping limiting structure bears the impact force and limits the displacement of the movable magnetic assembly, so that a preset magnetic isolation gap is always kept between the second end of the movable magnetic assembly and the static magnetic assembly. Through non-contact limiting, metal impact noise is eliminated; by means of the constant magnetic isolation gap, long-term stability of electromagnetic force is guaranteed, and the problems that in the prior art, noise is large, the electromagnetic force is attenuated, sealing is poor, and the stroke is not stable are systematically solved.

The invention relates to the field of dust removal equipment, and discloses unpowered dust removal equipment for reducing the fall height of raw materials, the unpowered dust removal equipment comprises a chute plate, a material receiving plate is fixedly arranged at the upper end of the chute plate, and a plurality of spacers are arranged on the inner walls of the material receiving plate and the chute plate. The actual falling fall height of raw materials is reduced from the source, unpowered speed reduction, dust removal and noise reduction effects are achieved, the raw materials are guided and gathered after falling to the obliquely-arranged material receiving plate, and when the raw materials slide down along the material receiving plate and the chute plate, the raw materials are gradually blocked and decelerated through the special-shaped annular spacers arranged on the inner wall at equal intervals, the sliding speed is reduced, and no external power exists in the whole process; dust generated by impact and friction of raw materials can be reduced from the source, and meanwhile impact noise can be weakened.

The application relates to the technical field of artificial intelligence, and discloses a BCM module cooperative control method based on voice instruction recognition in a vehicle high-noise environment, which comprises the following steps: collecting original voice instruction data and vehicle state parameter data in the vehicle high-noise environment; performing voice signal preprocessing in the noise environment based on the original voice instruction data to generate denoised voice instruction data; through multi-level noise suppression processing combining adaptive filtering and spectral subtraction, engine noise, wind noise and steady-state background noise are filtered out, and residual noise is eliminated for sudden impact noise, so that the intelligibility of the voice signal is improved. Meanwhile, through a voice activity detection algorithm, and by dynamically adjusting the detection threshold according to the vehicle state parameters, effective voice segments and noise segments can be separated, the accuracy of voice feature extraction in a complex time-varying noise environment is ensured, and the robustness and reliability of the voice instruction recognition are improved.

The invention provides a sub-array optimal distribution method and system based on a quantum antelope optimizer, and belongs to the field of array signal processing. The invention aims to solve the problem of inaccurate estimation of distributed array performance attenuation and direction of arrival due to reduction of the number of snapshots and change of interference noise under the conditions of small sampling snapshots and impact noise. According to the method, the array structure is optimized under the impact noise condition, received signals are processed by constructing an infinite norm weighted fraction low-order covariance matrix, and the method is more suitable for the environment where the number of snapshots is reduced and the impact noise is severe; a quantum optimization mechanism is introduced, and the performance and search efficiency of an original algorithm in the distributed array research direction are improved based on an evolution strategy of a quantum rotation angle and a quantum rotation door; according to the method, the direction finding accuracy of the distributed array system can be improved, and the situation that the array performance influence factors in the actual direction finding application are not considered sufficiently and the performance improvement is not large due to the fact that the directional diagram of the array serves as the optimization target can be effectively avoided.

This invention provides a structure and vehicle for improving the sound quality of a side door assembly when closing, belonging to the technical field of side door structures. The structure improves the sound quality of the side door assembly when closing by installing two sound-damping plates inside the through cavity of the door pillar. These plates isolate the noise generated by the door lock assembly during closing, preventing sound and airflow from diffusing through the through cavity to the upper roof beam or lower door sill beam. By changing the direction of sound and airflow diffusion and shortening the duration of sound when the side door closes, the high-frequency components of the closing sound are effectively controlled. Furthermore, a reinforcing structure is added to the inner wall of the side door outer panel to improve its dent resistance. A clip is used to secure the pull cable, and a flexible sleeve is installed around the pull cable to prevent impact noise between the cable and the side door reinforcement plate. These structures effectively improve the sound quality when the side door closes.

The utility model discloses a high-load impact-resistant sliding table air cylinder which comprises an air cylinder body and a stroke limiting mechanism used for limiting the stroke of the air cylinder. The air cylinder body comprises a cylinder barrel, a sliding rail arranged at the top of the cylinder barrel, a sliding cover connected with the sliding rail in a sliding mode and a piston assembly arranged in the cylinder barrel and extending out of the front end of the cylinder barrel. The stroke limiting mechanism comprises an adjusting base fixed to one side of the cylinder barrel, a limiting block fixed to the sliding cover and extending into the adjusting base, a first buffering adjusting assembly arranged at the front end of the adjusting base, and a second buffering adjusting assembly arranged at the rear end of the adjusting base. The front end part of the sliding cover is connected with the piston assembly through a front connecting plate; a floating structure is arranged between the front connecting plate and the piston assembly. The front connecting plate is connected through the floating structure, the first buffering adjusting assembly and the second buffering adjusting assembly are arranged in the stroke limiting mechanism, the impact resistance is improved, abrasion and impact noise generated by rigid contact are effectively reduced, the stability and reliability of the air cylinder under the high-impact working condition are remarkably enhanced, and the service life of the air cylinder is prolonged. And high load, impact resistance and stable and lasting operation can be realized.

The invention discloses a multi-dimensional prediction method and system for periodic weighting of a coal mine working face for edge calculation, which are applied to the field of coal mine down pressure early warning and aim at solving the problems that the false alarm rate of the existing weighting early warning is high, the early warning time delay is relatively high, and sufficient time cannot be provided for speed reduction of a coal mining machine, secondary pressure supplement of a hydraulic support, personnel evacuation and the like. According to the method, whether impact noise exists or not is judged by calculating the standard deviation of collected data, when the impact noise exists, online HP filtering processing is carried out on the collected data, LSTM reasoning is carried out on an intermediate frequency fluctuation item after filtering processing, and early warning is carried out based on a reasoning result and a long-term trend item after filtering processing.

The utility model relates to the technical field of printing machine scrapers, in particular to an SMT printing machine scraper which comprises a connecting box, a plurality of adjusting assemblies are arranged at the lower end of the connecting box, pressure sensors are arranged on the adjusting assemblies, buffer blocks are arranged at the lower ends of the adjusting assemblies, and a supporting plate is arranged at the lower ends of the buffer blocks. A main knife is arranged on the bottom wall of the supporting plate, an auxiliary knife sleeve is arranged at the lower end of the main knife, the auxiliary knife sleeve is matched with the main knife and is in damping sliding connection with the main knife, a connecting shaft is arranged at the upper end of the connecting box, the adjusting assembly comprises a control box, a motor, a supporting rod, an adjusting rod and an adjusting block, and baffles are arranged at the two ends of the bottom wall of the supporting plate. The buffer block is of a multi-layer composite elastomer structure, dynamic balance of pressure in different areas of the scraper is achieved, impact noise generated when the scraper works is effectively reduced, and the scraper is particularly suitable for precise printing of high-viscosity solder paste.

The utility model relates to a driving mechanism of a car door lock, which comprises a transmission assembly, a locking connecting rod and a locking rocker arm, the center of the locking connecting rod is rotatably connected in a lock body by utilizing a pin shaft, and the transmission assembly is matched with the locking connecting rod for driving the locking connecting rod to deflect; the center of the locking rocker arm is also rotationally connected into the lock body through a pin shaft, and the top of the locking rocker arm is connected with the locking connecting rod in a hooking mode, so that the position state of the locking rocker arm can be adjusted through deflection movement of the locking connecting rod, and the locking rocker arm is used for opening or closing the lock body. Through cooperative arrangement of the transmission assembly, the locking connecting rod and the locking rocker arm, when the driving mechanism of the car door lock is used, the driving mechanism has the advantages of being simple in structure, stable in cooperative structure, stable and effective in transmission, long in service life, free of large impact noise and good in user experience.

The utility model discloses a contactor with mute effect, include: the shell is equipped with the accommodation cavity, the coil assembly includes the coil stand, and the coil stand is equipped with the chamber, the magnetic yoke subassembly is equipped with the first intermediate part and two first end parts, and two first end parts are connected with the first intermediate part respectively, and the first intermediate part extends to the chamber, and the magnetic yoke subassembly is equipped with the buffer piece between the accommodation cavity bottom surface, the armature subassembly is equipped with the second intermediate part and two second end parts, and two second end parts are connected with the second intermediate part respectively, and the second intermediate part extends to the chamber, and the second intermediate part is cooperated with the first intermediate part, and the second end part is cooperated with the first end part, in the product suction process, the buffer piece compression makes the magnetic yoke subassembly and armature subassembly same direction's relative movement, reduces the impact energy, reduces the impact noise, secondly, the buffer piece plays the separation between the magnetic yoke subassembly and the accommodation cavity bottom surface, reduces the energy that the magnetic yoke subassembly is passed to the shell after bearing the impact, reduces the noise, reaches the effect of mute.

The utility model discloses a minor-caliber cast steel pipe burial pit which comprises a pipe hanging pit and a heat preservation pit which are divided by a partition wall, an outlet is formed in the bottom of the partition wall, and a double-leaf outlet curtain is installed on the outlet. A box body cover covers the heat preservation pit, and a double-leaf inlet curtain is arranged at an inlet of the box body cover. A plurality of inclined rails are arranged in the heat preservation pit, and buffering turning assemblies are installed at the falling ends of the cast steel pipes of the upper and lower adjacent rails so as to buffer falling of the cast steel pipes. The bottom end of an arc plate of the buffering turning assembly is rotationally connected with a small shaft fixed to the lower-layer rail, the arc line of the bottom end is tangent to the surface of the lower-layer rail, and a spring is installed between the back face of the arc plate and the pit wall to buffer impact of the cast steel pipe. And a buffer pad is mounted on the arc surface of the arc plate, so that impact noise can be eliminated. The first-in first-out device realizes first-in first-out of the cast steel pipe, and is suitable for continuous production of small-caliber cast steel pipes.

The utility model belongs to the technical field of constructional engineering, and particularly relates to an energy-saving assembly type metal plate unit. The metal aluminum veneer panel, the shock absorption and heat insulation film, the first galvanized plate back plate, the heat insulation cotton and the second galvanized plate back plate are sequentially distributed from bottom to top, and the shock absorption and heat insulation film is attached to the upper end face of the metal aluminum veneer panel, so that impact noise and direct heat radiation of wind and rain on the metal plate are reduced. And secondly, the heat preservation cotton is clamped between the first galvanized plate back plate and the second galvanized plate back plate, so that the whole door and window outer frame can form a double-cavity heat insulation unit, the heat insulation performance is better than that of a glass unit, and the energy-saving effect of the whole wall surface can be improved. In addition, by arranging the thermoplastic broken bridge combined aluminum alloy buckling strips, after the thermoplastic broken bridge combined aluminum alloy buckling strips are connected with the metal plates, the thermoplastic broken bridge combined aluminum alloy buckling strips are connected with the reserved notches of the outer frame in a sleeved mode, rapid assembly and nail-free assembly can be achieved, the process time can be shortened to 25 minutes per piece, and therefore the assembly efficiency of the metal plate units is improved.

A key includes a base plate, a keycap, a connecting assembly, and multiple protruding structures. The connecting assembly includes a first connector and a second connector located between the base plate and the keycap. Multiple protruding structures are disposed on the upper surfaces of the first connector and the second connector. When the keycap is pressed to the down position, the multiple protruding structures on the first and second connectors press against the bottom surface of the keycap. The multiple protruding structures push open from the keycap, creating a gap between the keycap and the connecting assembly. This prevents the bottom surface of the keycap from contacting the upper surfaces of the first and second connectors, avoiding impact noise from surface-to-surface contact and thus eliminating noise.

The present application relates to a vortex braking structure and load release device, comprising a piston cylinder; a gas pressure release structure arranged on one side of the opening and controllable to release high pressure gas to the piston cylinder; a braking mechanism sliding in the piston cylinder under the action of high pressure gas and achieving automatic braking according to gas compression; the braking mechanism comprises two cover plates, an inner magnetic ring and an outer magnetic ring sliding in the piston cylinder. The present application has compact and reasonable structure, convenient operation, can realize large range variable depth underwater load release through water pressure balance release technology, comprehensively uses flexible cable and twice air intake mode, can realize load whole process acceleration and greatly smooth energy distribution of release process, reduces release process flow noise. The braking mechanism adopts vortex braking mode, can effectively reduce air cushion effect of rapid rise of piston cylinder counter cavity pressure at the end of movement, and can greatly reduce piston buffer process impact noise.

The utility model provides a silencer for fluid pressure equipment, which comprises a shell, a bearing is fixedly mounted at the upper end in the shell, and a controller is fixedly mounted on the outer surface of the shell. According to the silencer for the fluid pressure equipment, the inclined plates, the partition plates, the silencing cavities, the blades, the controller and other structures are arranged, the inclined plates are installed on the two sides of the interior of the shell to guide fluid to change the flow direction, the partition plates divide the shell into the multiple silencing cavities, the sizes of the silencing cavities are gradually reduced, and the silencing cavities are provided with air passing holes; the blades flexibly rotate with the help of a bearing and a rotating rod, part of kinetic energy is converted into rotating energy under fluid impact, fluid is evenly dispersed, the flow speed is reduced, and direct impact noise on a noise reduction cavity structure is reduced; a controller cooperates with a pressure sensor and an electromagnetic regulating valve, and the pressure sensor monitors the pressure of a noise reduction cavity and feeds back the pressure; the controller processes the signal according to a preset algorithm and then controls the opening degree of the electromagnetic adjusting valve, and the fluid pressure and flow are accurately adjusted.

The invention relates to the field of traction seats, in particular to a magnetic attraction force self-locking traction seat which comprises a traction seat shell, a locking claw is hinged to the interior of the traction seat shell, a linear sliding rail is arranged in the traction seat shell, and a guide driving mechanism used for starting when a traction pin enters is arranged in the linear sliding rail. Through the ingenious magnetic circuit switching design, the traction pin mechanically drives the second magnet to rotate in the insertion process, the magnetic pole relative relation between the traction pin and the first fixed magnet is automatically changed, and therefore generation and blanking of a magnetic field are intelligently controlled under the condition that external power is not needed. When the magnetic poles are in the same direction, the magnetic field is guided out through the guiding metal sheet, strong adsorption force is formed, the locking claw is rapidly attracted, and magnetic force auxiliary instant locking is achieved. According to the process, the insertion force and impact noise needed by pure mechanical locking are greatly reduced, the connection action is smoother and softer, meanwhile, the sufficiency and consistency of locking are ensured through the magnetic attraction force, and the connection reliability and the operation experience are improved.

The utility model discloses a pressing block assembly which comprises a pressing plug, a pressing block and a gasket used for abutting against a steering lead screw, a spring is arranged between the pressing plug and the pressing block, the spring is in a compressed state in an installation state, the gasket is fixedly arranged at the end, away from the pressing plug, of the pressing block, and the gasket is made of flexible nonmetal materials. The pressing plug is used for being fixed to the steering shell, the pressing block abuts against the steering lead screw through the gasket, the gasket is made of flexible materials, the impact noise can be effectively reduced, the gasket can be made of plastic or rubber, and the impact noise of the plastic / rubber and metal is obviously smaller than the impact noise of metal and metal.

The utility model relates to the field of intelligent closestools, and discloses an intelligent closestool mute drainage device which comprises a pedestal pan, a base and a sewer pipe, the pedestal pan is fixedly installed on the top face of the base, the sewer pipe is fixedly installed on a drain outlet outside the pedestal pan, the sewer pipe is arranged in the base, and a sound insulation shell structure is arranged at the position, close to the pedestal pan, of the sewer pipe. A sound insulation shell structure is arranged in the water drainage pipeline, a sound absorption structure is arranged in the sound insulation shell structure, a multi-stage trap structure is arranged at the end, away from the pedestal pan, of the water drainage pipe, the sound insulation shell and the sound absorption structure which comprise sound absorption cotton, a sound insulation film and other materials are arranged at the position, close to the pedestal pan, of the water drainage pipeline, water flow is buffered and decelerated in cooperation with the multi-stage trap, and water flow impact noise is reduced from the source; and various sound-absorbing and sound-insulating materials are utilized to absorb and block noise transmission in all directions, so that sharp and noisy noise generated during drainage is greatly reduced.

The utility model discloses a bed board supporting frame, which relates to the field of medical equipment, and comprises a supporting seat, a plurality of bed boards and a plurality of bed boards, the lower end of the lifting rod is inserted into the inserting groove, the lifting rod is of a tubular structure, and a throttling valve is arranged at the upper end of the lifting rod; the locking screw is connected to the top of the inserting groove in a threaded mode, and when the locking screw is screwed into the supporting base, the end of the locking screw abuts against the outer surface of the lifting rod. According to the bed board supporting frame, the communicated air cavities are formed in the supporting base and the lifting rod, when the lifting rod needs to fall, the throttling valve must be opened to complete falling of the lifting rod, and therefore the falling speed can be reduced, and impact noise can be reduced.

The utility model provides an automobile door lock fastener capable of avoiding impact noise between a worm and a lock body, and relates to the technical field of automobile door lock fasteners, the automobile door lock fastener comprises an upper shell, a lower shell, a lubricating device and a fixing device, the surface of the lower shell is provided with a swing arm, the inner wall of the upper shell is provided with a motor, and the motor is connected with the lower shell. A worm body is installed at the output end of the motor, a metal contact piece and a gear ring are installed on the inner wall of the upper shell, a gear is meshed with the worm body, the lubricating device is installed on the surface of the upper shell through a fixing device, and the lubricating device adds lubricating liquid to the surface of the worm body and the surface of the gear through a storage cylinder and an output box. When the locking device is used, parts of a worm body system can be fully and effectively lubricated and protected by lubricating liquid, so that pressure and friction force between the worm body and the lock body are reduced, noise generated by collision is further avoided, and the practicability of the locking device is improved.