4117 results about "Brake" patented technology

The invention discloses a self-adaptive adjustment method and system for twisting tension of a copper stranded wire. According to a state analysis result, a dynamic coupling adjustment mechanism is started, rapid response adjustment of tension is achieved by adjusting the matching relation between the rotating speed of a stranding cage and the linear speed of a traction wheel and linkage with the exciting current of a magnetic powder brake, tension data are rapidly collected through a sensor, and after filtering and abnormal value processing, the tension is obtained. The fluctuation frequency and amplitude are analyzed immediately, and adjustment is started once the fluctuation frequency and amplitude exceed a set range. During adjustment, the ratio of the rotating speed of the stranding cage to the speed of the traction wheel is adjusted, the current of the magnetic powder brake is linked, mechanical adjustment and electromagnetic braking are matched, and the response speed is much faster than that of traditional single-parameter adjustment. Therefore, the stress of the copper stranded wire in the stranding process is uniform, the wire diameter is not thinned or burrs are not formed on the surface due to sudden change of tension, the stranded wire pitch is uniform, the process requirement is met, and the influence on the stranded wire quality due to sudden change of the tension is avoided as much as possible.

The invention discloses a motor coil winding device and method, and belongs to the technical field of motor manufacturing, the motor coil winding device comprises a winding machine body, the upper surface of the winding machine body is fixedly connected with a pair of supporting plates, and the outer surfaces of the supporting plates are provided with self-adaptive floating wire protection assemblies; a wire dynamic regulation and control assembly is installed on the upper surface of the winding machine body, a fixing piece is installed on the upper surface of the winding machine body, and a winding displacement quality sensing assembly is installed on the portion, close to the fixing piece, of the upper surface of the winding machine body. The magnetorheological fluid in the magnetorheological fluid damper rapidly changes the rheological property under the action of a real-time control magnetic field, vibration transmission is effectively restrained, the phenomenon that a wire is broken due to too large tension is avoided, when it is monitored that the tension is too small, the magnetic powder brake increases the resisting moment and slows down the rotating speed of the pay-off reel to improve the tension, and if the tension is too large, the magnetic powder brake stops working. The magnetic powder brake reduces the resistance moment and accelerates the pay-off, and ensures that the wire is always at the optimal traction angle.

According to the brake disc ring surface accurate grinding equipment, by arranging the pressing and swinging mechanism, an assembly can be pressed and swing in a reciprocating mode between the first base table and the second base table, and the stability and the positioning precision in the grinding process are guaranteed; by arranging the detection mechanism with the lower surface of the joint as the unified reference, detection of the grinding amount is achieved, meanwhile, closed-loop feedback can be provided for the ring surface grinding mechanism, and the thickness consistency and the surface flatness of two ring surfaces are guaranteed; the first grinding device and the second grinding device which can ascend and descend are arranged, the grinding feeding amount is dynamically adjusted according to the detection result, and self-adaptive accurate grinding of the assembly swinging in a reciprocating mode is achieved. Meanwhile, through organic combination of a detection mechanism, a pressing mechanism and a grinding mechanism, multiple times of clamping and manual transferring are reduced, and the production takt time and the automation level are improved. The equipment can effectively guarantee the precision and repeatability of accurate grinding of the brake disc assembly, improve the parallelism and surface smoothness of the ring surface, improve the brake performance and meet the industrial continuous machining requirement.

The utility model discloses an electronic brake gear adjusting device for a water dripping wheel, which relates to the technical field of fishing gears and comprises a line cup component, a line wheel seat, a magnetic brake component, a cover plate and an adjusting operation unit. The adjusting operation unit comprises a gear adjusting rotating ring, an operation rod and a shifting piece. The gear adjusting rotating ring is rotationally installed on the inner side of the cover plate, and the operating rod penetrates through an arc groove in the cover plate to stretch out. The shifting piece is fixed to the bottom end of the gear adjusting rotating ring and sequentially triggers a plurality of toggle switches on the electric control board along with rotation of the rotating ring. According to the utility model, a discrete triggering mode that the mechanical swivel is combined with the toggle switch is adopted, traditional potentiometer adjustment is replaced, the problem of reliability caused by potentiometer abrasion is solved, meanwhile, clear gear feedback and operation hand feeling are provided for a user, and the device has the advantages of being simple in structure, long in service life and visual in operation.

The invention relates to the technical field of petroleum well logging, and discloses a fusing type releasing device and method for a well logging headstall, a split brake block is arranged in a second cavity of a lower connector and an outer shell, a heating rod is arranged on the split brake block in a surrounding mode, and the surface of the split brake block is wrapped with a fusing protection layer; the heating rod is attached to the fusing protection layer, the driving end of the high-voltage connector is connected with the power supply end of the heating rod through the lower connector, the heating rod is driven to heat and fuse the fusing protection layer, and after the fusing protection layer is fused, the split braking blocks are separated. The elastic ejector rod assembly abutting against the split brake block integrally moves towards the side of the split brake block, the brake hook is separated from the outer shell, headstall release is achieved, the whole operation can be completed only by opening the high-voltage connector, the operation process is simple, and unified treatment can be conducted on different cables and well depths.

The application discloses a bogie covering device, a bogie and a railway vehicle, and relates to the technical field of railway vehicles. The bogie covering device comprises a mounting cross beam, which is used for fixedly connecting to a frame body of the bogie; at least two mounting plates, which are fixedly arranged on the mounting cross beam, and at least one of the mounting plates is used for fixedly connecting to the frame body of the bogie; and at least one of the mounting plates is provided with a containing portion for containing an axle-mounted brake disc, and the bottom of the containing portion is protrusively arranged towards the outer surface of the mounting plate. The bogie covering device in the application can be applied to the bogie with a large-size axle-mounted brake disc; in the process of running, the airflow can be prevented from entering the bogie device through the avoiding holes to generate the aerodynamic resistance, most of the airflow can flow along the bottom surface of the bogie covering device from the outside of the bogie covering device, and compared with the airflow directly flowing through the complex components in the bogie covering device, the aerodynamic resistance can be effectively reduced.

The invention belongs to the field of mechanical performance testing, and relates to an intelligent testing method for the fatigue performance of a wet brake, which comprises the following steps of: acquiring real-time operation data of the wet brake under the condition that a load is applied by a loading device in a testing process by deploying a multi-source monitoring array; generating a fatigue stress distribution diagram representing the stress state of a preset test area of the wet brake based on working condition fusion analysis, correspondingly identifying a failure early warning signal representing the current fatigue damage stage so as to dynamically adjust the parameters of a loading device, and adjusting the stress state of the wet brake in the loading intermittent period of a single test cycle period. The fatigue performance response effect of the wet brake under the action of the current loading strategy is analyzed, the correction direction of the loading strategy of a secondary test cycle is determined, test convergence is achieved through iterative optimization, the consistency of a test result and a real fatigue damage rule is improved, meanwhile, the test efficiency and evaluation precision are improved through closed-loop regulation and control and a self-adaptive iterative framework, and the test accuracy is improved. And a reliable basis is provided for fatigue performance evaluation of the wet brake.

The invention discloses an automatic system for brake spring force detection, which relates to the technical field of mechanical engineering and automatic control, and is characterized in that a multi-physics field coupling measurement module adopts a nested force sensor group (a strain gauge and piezoelectric quartz compound) and non-contact displacement measurement, and is combined with a thermal expansion compensation ring to correct temperature influence in real time; the environmental interference suppression module eliminates electromagnetic and thermal interference through an electromagnetic shielding cavity and a temperature control platform; the dynamic error compensation engine realizes drift prediction and physical field fusion by using six-dimensional attitude sensing and edge calculation (LSTM + GPR double-stage model); the self-calibration executing mechanism completes nanoscale positioning and micro-force control based on air flotation driving and the bionic clamping jaw. The method solves the problem of measurement misalignment caused by environmental interference, material thermal deformation and clamping errors in traditional detection, and is suitable for high-precision spring force detection under complex working conditions.

The invention discloses brake caliper body assembling equipment which solves the problem that a rectangular ring is easily separated from a rectangular ring positioning rod and comprises an automatic rectangular ring assembling device and a caliper body assembling unit, and the caliper body assembling unit is used for assembling a caliper body assembled with the rectangular ring. The automatic rectangular ring assembling device comprises a rectangular ring positioning and assembling mechanism and a rectangular ring chuck mechanism. The rectangular ring positioning and assembling mechanism comprises a rectangular ring positioning rod provided with a rectangular ring positioning groove and a first lifting driver for driving the rectangular ring positioning rod to move up and down. The rectangular ring chuck mechanism comprises an upper layer chuck and a lower layer chuck, the lower layer chuck is used for extruding the rectangular ring into the rectangular ring positioning groove, and the upper layer chuck is used for preventing the rectangular ring from being disengaged from the rectangular ring positioning groove.

The application discloses a damping-adjustable hydraulic bushing and a control method thereof. The damping-adjustable hydraulic bushing is composed of a hydraulic bushing body and a solenoid valve. The hydraulic bushing body comprises a bushing support, a main spring rubber, a cast aluminum inner tube, an aluminum outer tube and a cage-shaped framework. The cast aluminum inner tube, the main spring rubber and the aluminum outer tube are coaxially arranged from inside to outside. The cage-shaped framework is arranged in the main spring rubber and used for supporting the main spring rubber. Two flow channel plates are assembled between the aluminum outer tube and the main spring rubber, so that a brake liquid chamber and an acceleration liquid chamber are formed between the main spring rubber and the flow channel plates respectively. A brake flow channel on the brake side flow channel plate cooperates with an acceleration flow channel on the acceleration side flow channel plate to form a passage. A connecting bridge is arranged on the cage-shaped framework. The solenoid valve is connected to the connecting bridge through bolts. An axial actuating hole is arranged on the cage-shaped framework. An actuating rod is arranged in the axial actuating hole and controlled by the solenoid valve.

A sheet material handling equipment includes a handling fixture having a frame adapted for attachment to a robot or manipulator; at least two arms anchored to the frame, each arm being formed by at least two semi-arms pivotally connected to each other and including a gripping member at its free end, the pivotal connection including a rotatable joint with a joint coupling having a joint brake, which are passive with a pressure or electric lock; and a first control line for distributing electrical power, and / or air, and / or hydraulic fluid for controlling the joint and / or the gripping member connected via an adapter to (a) an electrical power supply, and / or hydraulic fluid, and / or air to the robot or manipulator and to (b) a work line control unit, and an adjusting fixture structured to actively adjust a position of at least one of the arms and / or to unlock the joint brake.

The invention discloses an intelligent control anchor chain winding and unwinding system, and relates to the technical field of marine equipment, the intelligent control anchor chain winding and unwinding system comprises an anchor chain winding and unwinding mechanism, the anchor chain winding and unwinding mechanism is provided with an anti-inversion mechanism, the anti-inversion mechanism comprises a ring block with a hole, a rotating rod, a long rod, an electric cylinder and a gear ring, and the inner part of the ring block with the hole is rotatably connected with an inner ratchet wheel; a gear ring is fixed in the annular groove, the outer surface of the rotating rod is fixedly sleeved with a gear, a limiting block is fixed to the rotating disc, a clamping block is additionally installed at the telescopic end of the electric cylinder, a round rod is fixed to the surface of the rotating disc, and a pawl is rotationally connected to the outer surface of the round rod. According to the anchor chain braking device, the anchor chain can be braked in time when the power for driving the anchor chain chain wheel fails, so that the situation that the released length exceeds the safety range due to the fact that the anchor chain which is being withdrawn continuously slides down is avoided, the safety of a ship in the traveling process is improved, and meanwhile the service life of the anchor chain is prolonged.

The invention belongs to the technical field of laser cladding, and particularly relates to a TiC-Fe-Cr coating powder material for an automobile brake disc and a preparation method and application of the TiC-Fe-Cr coating powder material. The coating powder material is prepared from 60%-80% of TiC powder, 15%-30% of Fe powder, 4%-11% of Cr powder and 0.8%-2.2% of polyethylene glycol through mixing, wet grinding, spray drying, compression molding, sintering crushing and spherical densification treatment, and the coating powder material is attached to the surface of the brake disc in a laser cladding mode. By utilizing the arrangement, the invention provides a coating powder material which solves the problem of lack of a special laser cladding material for an aluminum alloy brake disc and overcomes the technical bottlenecks that a traditional grey cast iron brake disc is heavy in weight, quick in abrasion, capable of generating dust and easy to rust and an aluminum alloy brake disc is low in hardness and poor in abrasion resistance.

The invention relates to the field of brake early warning, in particular to a brake early warning method, device and equipment and a medium. According to the brake disc temperature, the brake disc thickness and the set temperature, the first residual heat capacity is determined, and the set temperature is the temperature for guaranteeing the braking efficiency; acquiring data corresponding to the unmanned aerial vehicle task, and calculating braking energy according to the data corresponding to the unmanned aerial vehicle task; brake early warning information is determined according to the first residual heat capacity and the brake energy, and the brake early warning information is used for conducting brake warning. The first residual heat capacity is determined according to the brake disc temperature, the brake disc thickness and the set temperature; according to the data corresponding to the unmanned aerial vehicle task, brake energy is calculated; brake early warning information is determined according to the first residual heat capacity and the brake energy; the multi-dimensional real-time evaluation of the brake disc state, the task parameters and the brake efficiency is integrated; the thermal risk is pre-judged through the task parameters, and accurate brake early warning information is determined.

The invention discloses heavy-load and self-driven intelligent loading and unloading conveying equipment which comprises a base frame, a brake mechanism, a power roller way, a driving mechanism, a transmission mechanism and a traction structure. The base frame adopts a channel steel full-welded frame and is provided with universal wheels and rolling wheels; the power roller way consists of ten heavy-load main rollers and is connected with a driving motor and a speed reducer through a chain wheel-chain mechanism; the brake mechanism is linked with the mop structure, the protective tube protects the cable, and the position detection sensor and the band-type brake motor realize safety control; the automatic loading and unloading device can cooperate with a tractor to work, the requirement for automatic loading and unloading of goods of 7000 kg is met, the loading and unloading efficiency is improved by more than or equal to 40%, the problems that existing equipment is poor in mobility and large in potential safety hazard are solved, and the automatic loading and unloading device is suitable for small and medium-sized sites and unmanned transfer scenes.

The application discloses an inertial centrifugal force control safe belt tightening device, relates to the technical field of tightener, and comprises a handle assembly, a base assembly and a long belt, wherein the handle assembly comprises a handle and a ratchet wheel, the base assembly comprises a base, the handle and the base are pivotally connected through a volute spring shaft, one end of the volute spring shaft is provided with a centrifugal brake assembly, and the centrifugal brake assembly comprises a brake disc, a brake cover, a brake pawl and a return compression spring. The application has the advantages of reasonable design, brake function, prevention of long belt swinging and injury of operators, personal safety of operators, handle limiting function, obvious improvement of smoothness and service life of the tightening device and excellent practicability.

The invention provides a brake disc air duct core and a manufacturing method thereof and a core box device, and relates to the technical field of casting devices.The brake disc air duct core is characterized in that a plurality of strip-shaped air ducts are evenly formed in the surface of a sand core body, the air ducts extend from the center of the sand core body to the edge, and the sand core body protrudes around the periphery of the sand core body in the vertical direction to form an outer ring core head; the middle of the sand core body protrudes in the vertical direction to form a middle core head, a protruding sand shooting face is arranged at the top of the middle core head, the middle core head and the bottom of the sand shooting face are hollow to form a middle sand core runner, and the technical problems that in the prior art, filling is insufficient in a thin-wall area or the edge, and the forming effect is poor are solved. The technical effect of improving the forming rate and the structural stability is achieved.

A system for a firearm having a timeable brake and a suppressor. The brake comprises a brake body, a first taper, and a collar configured to rotate independently of the brake body. The suppressor comprises a second taper. When the brake body is oriented in a selected orientation with respect to the suppressor, a force is applied to wedge the first taper into the second taper and rotationally lock the selected orientation of the brake body. Rotation of the collar to a locked position then secures the brake body to the suppressor.

The invention relates to the technical field of automobiles, in particular to an electronic mechanical brake clamping force estimation method and device, a controller, an automobile and a medium, and aims at solving the technical problems that an existing electronic mechanical brake with a built-in sensor is large in overall size, difficult to arrange and high in single piece cost. The method comprises the following steps: acquiring a motor rotation angle of the electronic mechanical brake; according to the motor rotation angle, the transmission element lead of the electronic mechanical brake and the transmission ratio of the transmission mechanism, the piston movement stroke of the electronic mechanical brake is determined; according to the movement stroke of the piston and a pre-calibrated target corresponding table, the first caliper clamping force of the electronic mechanical brake is determined; an estimated caliper clamping force for the electromechanical brake is determined based on the first caliper clamping force for the electromechanical brake.

The application discloses a brake interface wear and fatigue crack prediction method based on complete thermal-mechanical coupling, comprising the following steps: S1, establishing a finite element model, and discretizing total analysis time into multiple time periods; S2, starting finite element analysis, and calculating interface node contact pressure and node slip rate; S3, performing transient thermal-mechanical coupling analysis; S4, calculating node wear depth and wear direction, and updating grid information by using ALE technology; S5, judging whether the interface contact state is stable convergence; S6, ending analysis, unloading brake load, and obtaining brake disc residual stress; and S7, presetting a crack at the maximum residual stress, simulating crack propagation behavior, calculating stress intensity factor and brake disc fatigue life. The application can simulate tribological behaviors such as contact stress, temperature and wear, and realizes brake disc fatigue life prediction by taking residual stress after the thermal-mechanical coupling process as load input.

The utility model discloses a brake structure for a baby stroller, which adopts the technical scheme that when a brake treading part rotates under the action of external force and drives a brake mechanism to brake or unlock a wheel group, the brake treading part can automatically reset and lift, and particularly, the brake structure can be applied to the baby stroller. The brake treading part integrates the locking function and the unlocking function, when the brake treading part performs treading action at the initial position to achieve brake braking, the brake treading part can return to the original position, the brake treading part is treaded again to unlock brake braking, and the brake treading part returns to the initial position again. On the basis that the vamp contact requirement is eliminated, the technical effect of brake single-point control is achieved, daily use is facilitated, in conclusion, operation areas do not need to be distinguished through single-point interaction in the braking or unlocking process, brake interaction is concise, and the beneficial technical effects of being convenient to operate are achieved.

An elevator health state online monitoring method includes: acquiring parameters such as a position, a three-axis acceleration, an inclination angle, and a noise of a car in a running state of an elevator, left and right brake temperatures of a traction machine, and an environment temperature. Parameter measuring devices are installed on a top of the car and at the brake side of the traction machine. The parameters are collected to a cloud database through a wireless network after being acquired, and a judgment result is given through background automatic analysis. The method is mainly used for monitoring whether key mechanical parts of the elevator are abnormal or not, including guide rail deformation, guide shoe abrasion, car sliding, brake abrasion, adhesion, and the like. This way the health state of the elevator can be automatically monitored, and early warning can be carried out in time when abnormity is found.

A bicycle includes a suspension system of the rear wheel, where the crankset and the hub and sprocket each include at least one chainring engaged by the chain and a rotation shaft. A compensation device is interposed between the toothed plate and the shaft to allow an angular compensation stroke between them from a rest position corresponding to the absence of the pulling of the chain, to a compensation position, corresponding to a pulling action of the chain generated by the rear suspension. The compensation device includes a plurality of pairs of brake elements and respective compensation end elements where at least one shock-absorbing element is operationally interposed between at least one pair capable of deforming only in correspondence with a final portion of the compensations stroke and between at least another pair where at least one limiting element is interposed to limit the maximum deformation of the shock-absorbing element.

The invention provides a brake comprising a stator assembly comprising a stator iron core and a coil winding, and the coil winding is arranged on the stator iron core; the hub assembly comprises a hub and magnetic steel, and the magnetic steel and a friction part are arranged on the side, facing the stator core, of the hub; the armature is arranged between the stator assembly and the hub assembly; when the coil winding is electrified, the armature is adsorbed on the stator iron core; and when the coil winding is powered off, the armature is adsorbed on the friction part under the action of the magnetic force of the magnetic steel to brake the hub. During power-off braking, the suction force of the magnetic steel to the armature and the counter-acting force of the hub to the armature are mutually counteracted in the brake and do not act externally, and the axial force of a traditional brake to a motor is eliminated.

The utility model discloses a novel anti-liquid-carrying pressing pump which comprises a pump body and a pressing head, the pump body comprises a pump chamber, the upper end of the pump body is provided with a ventilation hole, a connecting rod is fixed below the pressing head, a pumping device is arranged in the pump chamber, the upper end of the pump body is fixedly provided with a lock cover, and a brake is arranged between the lock cover and the connecting rod. An angle limiting structure capable of limiting the rotating angle of the brake is arranged between the brake and the lock cover, a lifting structure capable of enabling the brake to ascend or descend when the brake rotates is arranged between the brake and the lock cover, and a sealing part is arranged on the brake. The pressing head is pressed down and is in threaded connection with the brake through the connecting rod to be locked on the brake, the brake is in a falling state, the sealing part blocks the upper end of the pump chamber to cut off communication between the ventilation hole and the pump chamber, and the solution is prevented from flowing out of the ventilation hole when the bottle is extruded or toppled. When the pressing head rotates and unlocks, the brake is driven to rotate and ascends to enable the sealing part to loosen the upper end of the pump chamber, so that the ventilation hole is communicated with the pump chamber for normal use of the pressing pump.

The embodiment of the invention provides a friction material composition, a brake lining, a preparation method of the brake lining, a brake and a vehicle. The friction material composition comprises the following raw materials in parts by weight: 2-10 parts of a fluoride mixture, 8-15 parts of graphite, 8-12 parts of phenolic resin, 4-12 parts of a metal oxide, 15-40 parts of a fiber material and 20-40 parts of other fillers, wherein the fluoride mixture comprises at least two of calcium fluoride, barium fluoride, cerium fluoride, aluminum fluoride, magnesium fluoride, potassium fluoride, sodium fluoride, beryllium fluoride and manganese fluoride. The brake lining prepared from the friction material composition can solve the problems of high wear rate and heat fading at the same time, the service life of the brake lining is prolonged, and the braking effect is improved.

The utility model discloses a material taking device for a brake disc and a hub bearing, which comprises a clamping assembly, the clamping assembly comprises a robot, the moving end of the robot forms a mechanism for respectively fixing the brake disc and the hub bearing, and the moving range of the moving end of the robot can cover a material frame; and the visual assembly is fixed relative to the position of the material frame, the brake disc or the hub bearing is fixed relative to the position of the material frame where the brake disc or the hub bearing is placed, and the visual assembly controls the robot to move the brake disc or the hub bearing according to the position of the brake disc or the hub bearing. The relative position of the robot and the material frame is determined through the visual assembly, then the relative positions of the brake disc and the hub bearing are determined, then the robot is controlled to move to the designated position, the brake disc or the hub bearing can be accurately grabbed by the robot, and then automatic material taking of the brake disc and the hub bearing is achieved; and scratching caused by carelessness or other reasons in the manual material taking process is avoided, and the surface quality of the brake disc and the hub bearing is guaranteed.

A specialized tool for replacing an anchor pin bushing on a large truck or trailer is provided. The tool is a solid, cylindrical shaft designed to be driven into the anchor pin bushing by an operator using a manual hammer. The tool features a cutout segment that allows it to be maneuvered around the wheel hub assembly while driving the bushing, thus eliminating the need for a burdensome removal of the wheel hub assembly. The tool can be used to remove an old bushing and to install a new bushing into an eye of a brake frame housing. The tool may also include a removable installation sleeve, which is used to prevent a new bushing from being driven in too far. An alternate embodiment describes the specialized tool in a format designed to be driven by standard pneumatic air tools.

The invention relates to the technical field of oil and gas drilling and production well control safety, and discloses a hydraulic blowout preventer monitoring method and device and a storage medium. The method comprises the steps that hydraulic flow data in a hydraulic pipeline opening and / or closing process of a hydraulic blowout preventer are obtained, and whether the hydraulic flow data are normal or not is judged; based on the hydraulic flow data, whether the hydraulic blowout preventer completes closing or opening operation or not is judged, and whether closing or opening is normal or not is judged; when it is judged that the hydraulic blowout preventer completes the closing operation, air pressure data associated with an air path for controlling the drilling machine to brake are obtained; judging whether the air pressure data is lower than a safety threshold; and if the air pressure data is lower than the safety threshold value, a first alarm signal indicating brake failure is generated and output. According to the system, the well shut-in state and brake effectiveness can be verified, and an alarm can be given in time when safety interlocking is abnormally removed, so that the accident that a drilling tool is lifted and broken due to state misjudgment or human negligence is fundamentally eradicated, and the problem that the safety state cannot be monitored is solved.

The invention discloses a pile diameter adjustable offshore pile driving device, an offshore pile driving barge and a pile driving method.The pile diameter adjustable offshore pile driving device is characterized in that the pile diameter adjustable offshore pile driving device comprises a base plate, two pile column guiding mechanisms and a band-type brake mechanism, the two pile column guiding mechanisms are slidably installed on the base plate, and the band-type brake mechanism is arranged on the base plate; a guide space is formed between the two pile column guide mechanisms in a surrounding manner, and the pile column guide mechanisms are controlled to transversely move relative to the center of the base plate; and after the two pile column guide mechanisms finish preliminary clamping and positioning of the pile column, the brake mechanism can lock the pile column. And by adjusting the distance between the two pile column guide mechanisms, the width of the guide space can be adjusted so as to adapt to the pile diameters with different sizes.