681 results about "Contact failure" patented technology

The invention discloses a driver controller detection system, which comprises an acquisition module, an acquisition module, a processing module, an identification module, a judgment module, an analysis module and a generation module, the acquisition module captures contact information and electromagnetic interference data of contacts in real time by means of a high-dynamic voltage sensor and a broadband EMC probe; the acquisition module is triggered by a locomotive signal and records dynamic working condition data; the processing module aligns the data, performs denoising and extracts fault parameters; the identification module scans the voltage waveform and judges the transient contact failure; the judgment module monitors EMC data and compares an instruction position, and judges misoperation; the analysis module analyzes fault association, judges a composite type and triggers an alarm; the generation module generates a detection report and a log. According to the system, a multi-dimensional monitoring network is constructed under a dynamic working condition, data reliability is guaranteed, faults are accurately identified, a compound fault source is positioned, and the safety and stability of locomotive operation are improved through risk grading early warning and automatic reporting.

The invention provides a quick connector for an automobile starting motor, and relates to the technical field of starting motor connectors, the quick connector comprises a butt joint A and a butt joint B. A metal plug is installed in the butt joint A, and the metal plug is connected with a wire; the butt joint B is in contact with the butt joint A, a metal insertion cylinder is installed in the butt joint B, the metal insertion cylinder is connected with a wire, and a metal plug is connected with the metal insertion cylinder; and the outer part of the butt joint A is connected with a rotary connecting sleeve. After the metal plug is inserted into the metal insertion cylinder, the end part of the movable head is in close contact with the innermost end of the connecting seat under the thrust influence of the small spring, so that the conductive connection effect between the metal plug and the metal insertion cylinder is ensured, and the occurrence of poor contact is effectively avoided. The invention relates to a connector for an automobile starting motor, which solves the problem that the plug-pull connecting part of the connector is easy to loosen due to vibration when the existing connector for the automobile starting motor is generally fixed by adopting a plug-in matched threaded connection mode and is in a high-strength vibration working condition in an automobile for a long time.

The invention relates to the technical field of electronic couplers, in particular to a stable-connection coupler connector which comprises a first coupler, and a second coupler is arranged on the right side of the first coupler. And a connecting mechanism used for connecting and communicating the coupler I and the coupler II is further arranged, and the connecting mechanism comprises an electric contact disc I fixedly mounted in the left end of the coupler II. According to the invention, when the coupler I approaches the coupler II, the elastic pressing strip is driven to move synchronously, and when the electric contact disc I does not contact with the electric contact disc II, the elastic pressing strip is driven to move synchronously; a pressing plate is extruded, the pressing plate drives a first connecting rod to slide into a second coupler, a second spring and an air bag are compressed, air in the air bag is sprayed out from a nozzle hole, dust on the faces, close to each other, of a first electric contact disc and a second electric contact disc is conveniently removed in advance, and the removed falling dust can fall from an opening in the lower end of a limiting ring; the stability of the first electric contact disc and the second electric contact disc during conductive contact is ensured, and the condition of poor contact caused by dust is avoided.

The invention discloses a contact type alarm output device for a mechanical accelerometer, and relates to the technical field of accelerometers, the contact type alarm output device comprises a dome shell, and the dome shell is provided with a first cavity; the first contact, the second contact, the first alarm output lead and the second alarm output lead are inserted into the dome shell in a penetrating mode, the first alarm output lead is connected to the end, inserted into the outside of the dome shell, of the first contact, and the second alarm output lead is connected to the end, inserted into the outside of the dome shell, of the second contact. The second alarm output lead is connected to the end, penetrating into the outer portion of the dome shell, of the second contact, one end of the metal spring piece is fixedly connected to the first contact, the other end of the metal spring piece is in point contact with the second contact, and the metal spring piece and the second contact are in point contact design. And in combination with mechanical pushing of the conical sleeve, tight contact and reliable conduction during alarm triggering are ensured, and mistaken contact or poor contact caused by vibration or impact is avoided.

The invention discloses a power distribution box convenient for wire arrangement, and relates to the technical field of power distribution boxes, the power distribution box comprises a box body mechanism, the box body mechanism comprises a box shell, the inner wall of the box shell is fixedly connected with a fixing frame, the fixing frame is fixedly connected with a mounting frame, and the box shell is rotatably connected with a box door; the wire arranging mechanism is fixedly connected to the inner wall of the box shell and comprises a connecting frame fixedly connected to the inner wall of the box shell, the connecting frame is movably connected with a clamping frame, the clamping frame is in threaded connection with a fixing bolt, one end of the clamping frame is in contact with the surface of the connecting frame, and the clamping frame is fixedly connected with a limiting assembly. Through cooperation of the wire arranging mechanism and the wire arranging mechanism, wires in the distribution box can be arranged and arranged conveniently, target wires can be found quickly during maintenance, the fixed wires are also convenient to unlock, and when the cables are pulled by external force, the cables are not prone to displacement or tripping, so that the safety of the distribution box is improved. And the situation of poor contact hidden danger caused by stress deviation and even loosening of the wiring terminal is reduced.

The invention discloses an electric two-wheeled vehicle charging method and device with an intelligent fault diagnosis function and a storage medium, and relates to the technical field of electric vehicle charging fault diagnosis, the method has an intelligent fault diagnosis function, various data in the charging process can be monitored and analyzed in real time, potential faults can be recognized in advance, and charging safety and equipment reliability are improved. According to data collected by a sensor network, such as charging state, short circuit fluctuation, leakage current and cable temperature, the system can automatically identify faults such as poor plug contact, micro short circuit, electric leakage and temperature abnormity, generate corresponding fault instructions and timely take measures such as power failure and alarm to prevent accidents. And the self-discharge monitoring function can also judge whether self-discharge abnormity exists in the battery according to battery discharge data, and timely notify a user to overhaul, so that the battery is prevented from being damaged.

The invention relates to the technical field of microswitches, and discloses a microswitch contact life test method and system, and the method comprises the steps: carrying out the contact preheating operation and resistance reference measurement of a microswitch, and obtaining a contact resistance reference value and an initial fluctuation characteristic spectrum; setting a contact degradation monitoring threshold value based on the contact resistance reference value and the initial fluctuation characteristic spectrum; placing the microswitch in a test device for loop test, and recording a contact state data set in each test period; performing weighting processing on the contact state data set according to a test period, and calculating an average resistance fluctuation metric value and a contact degradation evaluation index; and performing dual-mode contact failure detection based on the average resistance fluctuation metric value and the contact degradation evaluation index, and generating target early warning signals of resistance abrupt change type and gradual change type failure modes, thereby improving the identification capability of different types of microswitch contact failure modes, and effectively avoiding sudden faults of equipment caused by contact failure.

The invention relates to the technical field of charging piles, and particularly discloses a charging pile with a self-locking type anti-falling direct-current charging gun, the charging pile comprises a charging pile body, the charging gun and a cable, the charging gun comprises a shell and a locking arm, a self-locking mechanism and a protection mechanism are arranged in the charging gun, the self-locking mechanism comprises a sliding sleeve, a sliding block and a connecting piece, and the sliding sleeve is connected with the cable. The locking arm is provided with a locking part and an unlocking part, the protection mechanism comprises a movable block, a reset spring and an overload spring, the cable has length redundancy in the charging gun, the cable drives the sliding sleeve to move by means of the self weight of the cable, the sliding block is driven to move to the position below the locking arm to form physical support, self-locking is achieved, poor contact is prevented, and when overload pulling force such as car sliding occurs, the cable is locked. The slide block is driven to cross the locking part and forcibly trigger the locking arm to unlock, and the overload spring is matched to push the charging gun to automatically separate; the problems that the charging gun is prone to loosening due to cable dragging and cannot be automatically released in danger are solved, and unification of rigid safety and flexible protection is achieved.

The invention relates to a MATLAB working condition prediction and ANSYS matching surface creep analysis method, and belongs to the technical field of mechanical engineering structure connection analysis and monitoring and computer-aided engineering software integration. The method comprises the following steps that a user inputs geometric parameters and typical working conditions through an MATLAB GUIDE interaction interface, and a system can generate a theoretical response curve of the matching surface pressure changing along with the magnitude of interference, the load and the rotating speed in real time and is used for evaluating the maximum allowable working parameter range. And then ANSYS is called to carry out batch finite element simulation, and actual contact pressure distribution and a creep strain cloud picture are obtained, so that the influence of different working condition combinations on the creep behavior of the matching interface is quantified. The method supports visual comparative analysis under the combination of multiple working conditions, and a user can intuitively master the evolution law and the creep development trend of the pressure distribution of the matching surface. The interactive critical failure discrimination module integrated in the system can automatically identify typical contact failure situations and perform significant annotation in images.

The invention relates to the technical field of new energy automobile connectors, and discloses a self-locking U-shaped connector for a new energy automobile, which comprises a socket end and a plug end, the plug end is inserted into the socket end, a self-locking mechanism is fixedly mounted on the outer side of the plug end, an auxiliary matching rod is connected to one side, far away from the plug end, of the self-locking mechanism, and the auxiliary matching rod is connected with the socket end. A reset mechanism is arranged on the self-locking mechanism, and a control mechanism is connected between the auxiliary matching rod and the reset mechanism. Through the arrangement of the self-locking mechanism, in the continuous butt joint process of the socket end and the plug end, rotation of the auxiliary matching rod can drive the self-locking assembly to rotate synchronously, then through continuous meshing of the clamping rod and the ratchet groove in the inner side of the ratchet wheel ring, the auxiliary matching rod can rotate in the opposite direction, and continuous locking is achieved; according to the utility model, the existing single-point locking mode is changed, so that the locking is stable, and the problems of poor contact and even loosening easily caused by abrasion of the existing single-point locking latch hook and deformation of the boss are solved.

The invention provides a conduction tester for a wire harness connector, and particularly relates to the technical field of electrical testing of connectors, the conduction tester comprises a testing table plate and a tester body mounted on the top surface of the testing table plate, one side of the tester body is provided with an accommodating cabin, and one side of the tester body is provided with a display and a main controller; according to the conduction tester of the wiring harness connector, the limiting sliding block is stably matched with the limiting sliding rail on the cabin wall of the containing cabin, the probe seat can be accurately aligned with the connector in the clamping groove seat through the servo air cylinder, the probability of poor contact caused by manual insertion is greatly reduced, it is guaranteed that the test is smoothly carried out, and meanwhile the testing efficiency is improved. Through the cooperation of the pressure sensing part, the main controller and the force value regulator, the driving force of the linear driving part can be kept in a proper range, and the stable contact state of the probe and the connector is ensured, so that the test result is more reliable, and the test error caused by the contact problem is reduced.

The invention provides a motor casing preorder processing flow method, which is applied to the technical field of motor casing processing, and comprises the following steps of: obtaining a casing, a connector and a PCB (Printed Circuit Board), and independently processing the casing, the connector and the PCB; the manipulator collaboration comprises but is not limited to a cylinder, a motor and a belt for conveying materials; processing flow positions of the casing, the connector and the PCB are determined through code scanning; the detected defective products are conveyed out of the outside from the defective belt; the shell, the connector and the PCB are independently processed and synchronously circulate; a two-dimensional code / visual system is used for tracking the position of an assembly in real time, processing paths are dynamically distributed, poor contact caused by reverse assembly is prevented through connector positive and negative recognition and marking detection, and accurate alignment of pins and connector jacks is guaranteed through PCB pin detection and position calibration. According to plasma cleaning and welding point position detection, the cleaning effect and welding point integrity are verified through a camera, the cold solder joint and offset risks are eliminated, defective products are rapidly moved out through an independent belt line, qualified products are prevented from being mixed in, and the product consistency is ensured.

The invention relates to the technical field of insertion loss test, and discloses a spring force control insertion loss test probe device which comprises a mounting seat, an elastic probe assembly and a fine adjustment assembly. A supporting frame is arranged at the bottom of the mounting base, the elastic probe assembly is located below the mounting base, the elastic probe assembly is connected with the supporting frame, the height of the elastic probe assembly is adjustable, the fine adjustment assembly is located on one side of the probe assembly, one end of the fine adjustment assembly is connected with the elastic probe assembly, and the fine adjustment assembly is used for adjusting the elastic value of the elastic probe assembly. The optimal contact pressure can be accurately set according to the characteristics of different circuit boards, poor contact caused by too small pressure or needle mark damage caused by too large pressure is avoided, the same set of device can adapt to the test pressure requirements of different circuit boards, and the problem that the fixed elastic K value cannot be adjusted, and consequently the needle mark difference between different boards is large is solved.

According to the double-fed fan wiring terminal contact fault on-line detection system provided by the invention, through electric-thermal-mechanical multi-physical quantity collaborative analysis, the early recognition rate of the terminal contact fault is remarkably improved; precise alarm under different load working conditions is realized by utilizing a self-adaptive threshold adjustment function of the edge calculation module; based on a multi-dimensional feature fusion algorithm of a cloud digital twinborn model, a material degradation rule calibrated by a laboratory is combined with real-time operation data, so that the prediction accuracy is greatly improved; an automatic response chain from early warning to emergency disposal is achieved through a grading decision mechanism, the manual inspection frequency is reduced, and meanwhile the fault positioning precision is further improved through three-dimensional coordinate positioning and adjacent terminal cooperative detection.

The utility model provides a quick connecting plug for a dimmer of an airport navigational lighting system, which relates to the field of electrical technology and comprises an aviation socket, an aviation plug is arranged at one end of the aviation socket, a jack is arranged at one end of the aviation socket, and a pin is fixedly mounted on the inner wall of the aviation plug. According to the utility model, through the arrangement of the protection plate, when the aviation plug and the aviation socket are separated, external foreign matters and impurities can be effectively prevented from entering the plug, the problem of poor contact caused by entering of the impurities into the plug is reduced, the reliability is improved, and the protection plate automatically shields when the plug is not inserted into the socket. When the plug is inserted, the plug automatically slides to give way, and the contact pin is exposed, so that dust can be effectively prevented from entering, meanwhile, faults and abrasion caused by poor contact can be reduced due to the fact that external impurities are prevented from entering, the service life of the connecting plug is prolonged, and the maintenance cost is reduced.

The invention relates to the field of semiconductor device manufacturing equipment, in particular to a semiconductor rotary feeding and welding device which comprises a rotary lifting table, a pressing mechanism, a first limiting table and a second limiting table. The rotary lifting table drives the two limiting tables to switch the contact state with the auxiliary positioning supporting table or the conductive positioning supporting table, and precise positioning and welding operation between the second semiconductor workpiece and the first workpiece are achieved in combination with the pressing mechanism. Meanwhile, the negative pressure adsorption function and the automatic reset performance are ensured through various structural designs such as an elastic piece, a piston cavity and a capillary channel, the assembly efficiency and precision are remarkably improved, and the problems of position deviation, poor electrical contact and the like possibly occurring in the welding process are effectively avoided. The purpose of improving the production quality and the working efficiency of the semiconductor element is achieved, and high reliability and practicability are achieved.

The invention relates to the technical field of railway bearing maintenance, and particularly discloses an end face polishing device for railway bearing maintenance, which comprises a base, first sliding chutes, a sliding assembly, a positioning mechanism, a moving assembly, a polishing mechanism and a railway bearing outer ring, the positioning mechanism is arranged at the top end of the sliding assembly, and the moving assembly is arranged on the right side of the top end of the base. The device can monitor the abrasion state of the grinding wheel in real time, discover the out-of-round or excessive abrasion condition of the grinding wheel in time, and avoid the situation that the grinding quality is reduced or the bearing end face is damaged due to the irregular grinding wheel contour; meanwhile, the position of the grinding wheel can be dynamically adjusted according to the abrasion loss, stable contact pressure between the grinding wheel and the bearing end face is always kept, the problems of low grinding efficiency and poor contact caused by diameter reduction of the grinding wheel are effectively solved, and the grinding precision and the operation stability are remarkably improved.

A battery contact failure detecting device includes a battery including a plurality of battery cells; a connecting part including at least one of a busbar, a contactor, and a fuse and connects the battery cells to each other; a sensor configured to measure a current and a voltage of each of the battery cells; and a processor configured to count a number of abnormal occurrences based on the current and the voltage measured by the sensor to detect a contact failure of the battery cells due to a short circuit or open circuit of the connecting part.

The composite terminal comprises a terminal body and a fixing sleeve, the terminal body comprises a welding part, a connecting part and a plugging part, the center of the plugging part is provided with a plugging hole, the center of the fixing sleeve is provided with a mounting through hole penetrating through the front end and the rear end of the fixing sleeve, and the plugging part is inserted into the mounting through hole to be welded and fixed to the fixing sleeve. The mounting through hole is communicated with the inserting hole, and the connecting part and the welding part are arranged on the outer side of the fixing sleeve. The composite terminal is simple in structure and rapid to install, a riveting wire part on the terminal body is omitted, a welding structure is adopted, the appearance of the terminal is simplified, the overall size of the terminal is reduced, a welding connection mode is adopted, the problem of mechanical stress relaxation is avoided, the vibration resistance and impact resistance are higher, and the service life of the terminal is prolonged. Stable transmission of electric signals is facilitated, and poor contact is avoided.

The utility model provides an 11-gear integrated AMT wire harness assembly which is used for solving the problems that a wire harness plug of an existing AMT wire harness is prone to loosening, the wire harness swings or is in poor contact under the complex road condition, and the technical problem that when the whole wire harness is installed in a transmission shell, maintenance operation is tedious when part of the wire harness breaks down. The wiring harness assembly comprises an external wiring harness assembly, an internal wiring harness assembly and a cylinder penetrating connector, and the external wiring harness assembly and the internal wiring harness assembly are designed in a split mode, are fixed to the exterior and the interior of a gearbox shell respectively and are connected through the cylinder penetrating connector; and the external wire harness group is easy to replace, so that the tedious steps of replacing the whole wire harness and disassembling the gearbox due to the damage of the external wire harness group are avoided.

The invention provides a control method and device of charging equipment for a magnetic suction type ship, a medium and a controller, and aims to solve the problems that when an electric ship or a hybrid power ship is in shore for charging, a charging connecting device is prone to loosening, sealing failure, poor contact and the like due to stormy wave swing, and a magnetic suction fixing device is additionally arranged on the charging connecting device; the charging plug and the charging socket are firmly fixed through magnetic force, the stability and reliability of the charging process are remarkably improved, the charging failure caused by ship swing is effectively avoided, and the safety and efficiency of ship charging are guaranteed.

The invention relates to the field of conductive slip rings, in particular to a strong and weak current isolation conductive slip ring, which comprises a shell, a first contact compensation device, a second contact compensation device and a multi-layer shielding structure, and is characterized in that a strong conductive inner ring, a weak conductive inner ring, a strong conductive outer ring and a weak conductive outer ring are coaxially arranged in the shell; the first contact compensation device is fixed on the inner wall of the strong conductive outer ring and is used for adjusting the contact pressure between the electric brush and the strong conductive inner ring, the second contact compensation device is fixed on the inner wall of the weak conductive outer ring and is used for adjusting the contact pressure between the electric brush and the weak conductive inner ring, and the multi-layer shielding structure is arranged between the strong conductive system and the weak conductive system. And strong and weak current complete isolation is realized. The contact pressure between the electric brush and the conductive inner ring can be adjusted, the electric brush structure can automatically and elastically compensate along with abrasion of the conductive inner ring, it is ensured that the contact surface always keeps stable pressure and area, and the problems of poor contact, transmission distortion or failure caused by long-term friction of a traditional conductive slip ring are effectively solved.

The invention relates to the field of circuit breakers, and particularly discloses a grounding circuit breaker, which comprises a box body structure, a fixing piece and a clamping piece, the use of the box body structure not only can limit the sliding of the fixing piece, but also can tighten the clamping piece, thereby clamping the electric wire and preventing the electric wire from falling off and inclining. The fixing piece is used to replace the original mode of fixing the wire by screws, so that the operation steps are simplified, the wire is more quickly and conveniently fixed, the wire is effectively prevented from sliding left and right, and the problems of unstable wire installation, wire loosening, poor contact and the like are avoided; the use of the clamping member not only can clamp the wire, improve the stability of the fixing member for fixing the line and prevent the wire from loosening, but also can wrap the wire, so that the wire cannot move left and right, the fixing member can accurately clamp the wire, and the reliability of the fixing member is improved.

The utility model discloses an automobile mortise lock structure, a switch and a key structure thereof, relates to the field of switch equipment, and can solve the problem of poor contact caused by pollution of an inner cavity of the switch in the prior art. The switch comprises a shell connected to the installation support, a first terminal connected to an inner cavity of the shell, a second terminal connected to the inner cavity of the shell, a third terminal connected to the inner cavity of the shell, an elastic piece connected to one end of the first terminal and connected with the third terminal in an abutting mode, and a key connected to the elastic piece. A key hole communicated with an inner cavity of the shell is formed in the top face of the shell, the key penetrates out of the key hole, the key structure comprises an elastic piece connected to the top face of the shell and a key column connected to the elastic piece, a sealing cavity is defined by the elastic piece and the top face of the shell, and the penetrating-out end, penetrating out of the key hole, of the key is located in the sealing cavity. A pressing surface matched with the key is formed on the inner wall of the sealing cavity of the elastic piece, and a pressing gap is formed between the pressing surface and the key, so that the key column extrudes the elastic piece, and the pressing surface abuts against the key.

The utility model relates to the field of connectors, and provides an assembling device for a connector. The assembling device for the connector comprises a base, wherein a buckle for fixing a cable is arranged on the base; the first rotating ring is movably connected to the base, and the first rotating ring is used for installing a fastening seat of the connector; the second rotating ring is connected to the base, and the second rotating ring is used for installing a crimping seat of the connector; the clamping ring is movably connected to the base and located between the first rotating ring and the second rotating ring, and the clamping ring is used for clamping a middle cylinder of the connector. According to the assembling device for the connector, the steps and time of manual operation are reduced, and the assembling efficiency is remarkably improved; the assembly error caused by the movement of the cable is avoided; torsion fracture of the cable itself is avoided; and the quality problems, such as poor contact and looseness, of the connector caused by improper assembly are reduced, so that the overall quality of the product is improved.

The application discloses a packaged contactor, which comprises a cover, a base, a moving contact assembly, a static contact assembly and a magnetic propulsion mechanism, the cover is arranged above the base and the joint surface of the cover and the base is sealed, the moving contact assembly, the static contact assembly and the magnetic propulsion mechanism are all arranged in the contactor, the moving contact assembly and the static contact assembly are arranged in a phase-to-phase insulation cover, the phase-to-phase insulation cover is fixed on the base, and the moving contact assembly and the static contact assembly are oppositely arranged; the magnetic propulsion mechanism comprises a moving iron core, a static iron core and a coil framework, the moving iron core is fixed on a moving iron core support, the moving iron core support is connected with the moving contact assembly, the static iron core is inserted into the coil framework, and the moving iron core moves towards the static iron core after the coil is electrified, thereby driving the moving contact assembly to move downwards. The application can solve the technical problems of abnormal sound and poor contact of the contactor caused by dust and foreign matters entering the contactor, and significantly prolong the service life of the contactor.

The invention relates to the technical field of electric tool switches, in particular to a redundant contact electric tool switch which comprises a shell, a mounting structure, a control structure, a sealing structure, a driving structure and a triggering structure. The arrangement of the trigger structure realizes double-point contact, the design of the redundant contact system avoids the problem of poor contact caused by abrasion of a single contact, avoids the problem of repeated disassembly of the switch for maintenance, improves the practicability, and meanwhile, the movable and static contacts are not easy to fall off when being in contact, are strong in stability, and are convenient to maintain. The arrangement of the sealing structure ensures the overall sealing performance inside the switch, avoids the problem of poor contact caused by dust entering the switch, avoids the problem that a sealing ring at the joint of the button and the shell is easy to fall off, and the arrangement of the control structure realizes the switching between a switching mode and a rotating speed adjusting mode. The rotating speed of the electric tool is adjusted by pressing the button, and flexibility is high.

A battery contact failure detecting device (200) according to the present invention includes a battery module (100, 210) formed of a plurality of battery cells (10, 10a, 10b); a connecting part (220) including at least one of a busbar, a contactor, and a fuse and connects the battery cells (10, 10a, 10b) to each other; a sensor (230) configured to measure a current and a voltage of each of the battery cells (10, 10a, 10b); and a processor (240) configured to count a number of abnormal occurrences on the basis of the current and the voltage measured by the sensor (230) to detect a contact failure of the battery cells (10, 10a, 10b) due to a short circuit or open circuit of the connecting part (220).

The utility model belongs to the test technical field provides a kind of test tool for testing mechanical timer, it includes: test board, several positioning posts are arranged on it, positioning post is used to limit the timer to be detected relative test board movement;Guide mechanism is set on test board, guide mechanism includes several pins, pin can reciprocate along vertical direction, and movable contact in timer, for detecting the timing time of timer.Compared with prior art, the utility model has the advantages that by the cooperation design of adjusting part and fixed pressing plate, pin always stably contacts timer during testing, avoids misjudgment or missed detection caused by poor contact, ensures the accuracy and consistency of test result, improves the convenience of operation and test efficiency at the same time;Meanwhile, adjusting part can be flexibly adapted to different specifications of timer product, has good versatility and expansibility, suitable for batch detection of multiple models of mechanical timer.

The utility model discloses an automatic adjusting device for the extension length of an ultra-fine oilstone, which comprises an oilstone and a mounting seat used for being mounted on external bearing processing equipment, the mounting seat is provided with an adjusting groove along the height direction, the oilstone slides in the adjusting groove, and the initial end of the oilstone penetrates out of an opening at the tail end of the adjusting groove. A pressing plate used for pressing the tail end of the oilstone is arranged in the adjusting groove in a sliding mode, and the installation base is provided with a driving piece used for being in linkage fit with external hydraulic driving equipment so as to apply loads to the oilstone through the pressing plate and a guiding piece used for being in linkage fit with the driving piece so as to guide the loading position and direction of the loads. The pressing plate is provided with a detection piece used for detecting the contact degree of the starting end of the oilstone and an external bearing ring channel and a positioning piece used for guiding and positioning the sliding direction of the oilstone. The oilstone solves the problem of poor contact between the oilstone and a product to be machined due to the fact that the extension length of the traditional oilstone is not adjusted in time or the oilstone is abraded excessively during machining.