934 results about "Electro hydraulic" patented technology

The invention discloses a casting production device of a corrosion-resistant cast iron cylinder sleeve, and relates to the technical field of cylinder sleeve casting, the casting production device comprises a bottom frame, a bottom shell is fixed on the top surface of the bottom frame, two sliding grooves are formed in the top surface of the bottom shell, the cylinders are fixed on four edges of the top surface of the bottom frame, and the top shell is fixed on the top of the outer wall of the cylinders. An electric hydraulic rod penetrates through and is fixed to the middle of the top face of the top shell, a sliding shell is fixed to the bottom face of the telescopic end of the electric hydraulic rod, the inner wall of the sliding shell is slidably connected with the outer wall of a cylinder, a round mold is arranged in the middle of the bottom face of the sliding shell, a sand mold block and a U-shaped frame are placed in the middle of the top face of the top shell, and the U-shaped frame is fixed to the bottom end in the bottom shell. The sand mold block is clamped and positioned through the two U-shaped frame plates, so that the problem that the casting effect of the corrosion-resistant cast iron cylinder sleeve is poor due to the fact that the sand mold block deviates on the table top is solved.

A control device of an electric hydraulic excavator sets or computes a rotation speed command and an allowable torque of an electric motor on the basis of a required rotation speed of the electric motor, and a sum of a suppliable electric power of a converter and a battery suppliable electric power. An inverter of the electric hydraulic excavator sets the allowable torque to a torque command if a calculated torque of the electric motor computed by multiplying by a gain, a difference between the rotation speed command and a rotation speed of the electric motor, exceeds the allowable torque, and sets the calculated torque to the torque command if the calculated torque does not exceed the allowable torque. The inverter supplies the electric power that can generate a torque corresponding to the torque command to the electric motor.

In a hydraulic drive system used for an electrically driven hydraulic work machine that drives a hydraulic pump by an electric motor and supplies a hydraulic fluid to plural actuators to carry out work, the power consumption of the hydraulic pump is kept from exceeding a value decided in advance. For this purpose, a controller calculates target power to be consumed by the hydraulic pump on the basis of the capacity of the hydraulic pump, the delivery pressure of the hydraulic pump sensed by a pressure sensor, and a target revolution speed of the electric motor, and limits the target revolution speed of the electric motor in such a manner that the target power falls within a range of the maximum allowable power.

The invention relates to the technical field of vehicle safety auxiliary devices, and discloses an automobile multifunctional crawler-type anti-skid escape device which comprises tires, electric hydraulic cylinders and four sets of independently-controlled driving crawlers. Wherein the two groups of driving tracks are transversely arranged at the edge positions of the front end and the rear end of the automobile chassis to form a transverse track assembly; the vehicle body is lifted through the transverse track assembly, key parts are prevented from being eroded by accumulated water, and water flow impact is relieved; and thirdly, by means of independent control of the four sets of caterpillar bands, the vehicle is endowed with flexible maneuvering functions such as pivot steering and transverse movement, and accurate parking in a narrow space and obstacle avoidance are assisted. The whole structure is designed based on vehicle model customization, and an active and multifunctional driving safety guarantee means is provided for a driver on the premise that an original vehicle framework is not changed.

An electric hydraulic brake includes: wheel brakes configured to braking force to wheels of a vehicle; a reservoir storing brake oil; a master cylinder connected to the reservoir, and operated in conjunction with a main brake motor to generate pressure of the brake oil; a first controller configured to control the main brake motor; a hydraulic controller including a pump configured to form pressure of the brake oil in conjunction with an auxiliary brake motor, and a hydraulic block configured to selectively transmit the pressure of the brake oil formed in the master cylinder or the pump to the wheel brakes; and a second controller configured to control the auxiliary brake motor when the master cylinder or the first controller malfunctions. The hydraulic controller is provided with an auxiliary flow path to transmit the brake oil from the reservoir to the pump directly through the auxiliary flow path.

The utility model discloses a high-frequency quenching positioning tool which comprises a box body, the box body is not provided with a cover, and a control console is arranged on the side wall of the box body; the functional part comprises an electric hydraulic column and a plurality of magnetic induction rings, the lower end of the electric hydraulic column penetrates through the plurality of magnetic induction rings to be fixedly connected to the bottom of the box body, the plurality of magnetic induction rings are fixedly connected to the inner wall of the box body, and the electric hydraulic column and the plurality of magnetic induction rings are in circuit connection with the console; and the fixing part comprises a bottom plate and a fixing assembly, the bottom plate is fixedly connected to the upper end of the electric hydraulic column, and the fixing assembly is fixedly connected to the middle position of the bottom plate.

The invention relates to an intelligent trestle control system for a molten iron combined transportation dam-crossing railway, which comprises a monitoring device and a plurality of subsystems, and is characterized in that each subsystem comprises a water level measuring device for measuring the water level condition in real time; the intelligent electric hydraulic mechanism is used for automatically adjusting the height of the bridge pier according to the real-time water level condition so as to adjust the height of the trestle; the gantry crane control system is used for controlling transportation of containers between a railway train and a cargo ship and comprises the steps that after the cargo ship is parked on one side of a trestle, the containers on the cargo ship are hoisted to the train parked on the trestle, or the containers on the train parked on the trestle are hoisted to the cargo ship parked on one side of the trestle; the rapid gate opening and closing device is used for controlling the gate opening and closing state of the flood control gate groove section based on the real-time water level condition; and the monitoring device is used for being connected with the subsystems through the multi-modal data fusion processor and executing cooperative control.

An electro-hydraulic tubing punch is provided, comprising a controller, an electronic section, a hydraulic chamber, a punch head, and an oriented centralizer. The controller transmits signals to the electronic section, which activates a motor-driven pump in the hydraulic chamber, communicating hydraulic fluid to the punch head. The punch head includes a retractable piercing punch with a tip, neck, body, and stem, where the neck is shaped as a truncated hyperboloid and the stem includes an internal channel. Hydraulic fluid displaces a punch piston within a fluid cavity, causing the piercing punch to extend through an engagement panel. The oriented centralizer includes hinged arms and collars for positioning. The electro-hydraulic tubing punch transitions between retracted and extended configurations via user input received by a punch actuator.

The present disclosure relates to a brake system and a method of controlling the same, the brake system including first and second wheel speed sensors respectively installed in wheels of a vehicle, electrohydraulic brakes respectively installed in front wheels of the vehicle, electromechanical brakes (EMBs) respectively installed in rear wheels of the vehicle, and a first controller configured to perform braking control on the electrohydraulic brakes and the electromechanical brakes based on a first front wheel speed signals outputted from the first wheel speed sensors installed in the front wheels, in which when a failure of the first wheel speed sensors installed in the front wheels are identified, the first controller performs the braking control on the electrohydraulic brakes and the electromechanical brakes based on the first rear wheel speed signals outputted from the first wheel speed sensors installed in the rear wheels.

The invention belongs to the technical field of new energy automobile steering systems, and discloses a new energy automobile electric hydraulic power-assisted steering system and a control method thereof.The system integrates a double-source redundant hydraulic power unit, a hydraulic adjusting unit, a multi-dimensional working condition sensing unit and an intelligent main controller; the multi-dimensional working condition sensing unit is integrated with a road adhesion coefficient detection module and a battery remaining capacity detection module. The control method is layered look-ahead matching control and is executed by an intelligent main controller in parallel: a power-assisted decision-making layer divides a three-stage power-assisted mode according to multi-dimensional perception information, and limits a steering angular velocity when power-assisted is enhanced on a low-attached road surface; the energy optimization layer predicts and implements prospective energy storage and pump rotating speed self-adaptive adjustment based on the intention of a driver; and the fault diagnosis layer realizes rapid fault identification and redundancy switching through multi-parameter collaborative diagnosis. The contradiction of high energy consumption, response delay and weak safety guarantee of a traditional system is solved, and power-assisted steering which is safe, energy-saving, fast in response and high in adaptability is achieved.

The utility model relates to a cutting device for test paper production, which comprises a device body, the upper surface of the device body is fixedly connected with a conveying frame, the inner wall of the device body is clamped with a conveying belt, and the inner wall of the device body is fixedly connected with a mounting frame. According to the device, after parameters are set through the touch panel, automatic and orderly operation can be carried out, the human input is greatly reduced, the production efficiency is improved, and the device is particularly suitable for the large-scale test paper production requirement, meanwhile, an electric hydraulic telescopic rod is matched with an auxiliary pulley to precisely fix test paper, and an electric sliding frame drives a blade to stably move in an electric sliding groove; the test paper cutting device has the advantages that test paper displacement during cutting is effectively avoided, it is guaranteed that the edges of the test paper are neat, the size precision is high, the product quality is improved, the cutting protection plate and the cooling fan protect and cool the blade in the cutting process, the service life of the blade is prolonged, finally, the cut test paper is smoothly discharged under the assistance of the discharging auxiliary fan, and the problems of paper jamming and the like are solved.

The invention discloses intelligent suspension conveying equipment for tea production, and belongs to the technical field of intelligent suspension conveying. The intelligent suspension conveying equipment comprises a fixing frame, a first fixing plate is arranged at the bottom of the fixing frame, rotating shafts are arranged in the two ends of the first fixing plate, belt round heads are arranged on the outer sides of the rotating shafts, and transmission belts are arranged on the outer sides of the belt round heads; a movable suspension arm is arranged on the outer side of the transmission belt, and adsorption equipment is arranged at the bottom of the movable suspension arm; a fixed frame is fixedly connected to the interior of the movable suspension arm, a second sliding rail is arranged in the fixed frame, a sliding block is movably connected to the interior of the second sliding rail, a movable rod is fixedly connected to the inner side of the sliding block, a third fixed plate is fixedly connected to the outer side of the adsorption equipment, and an electric hydraulic cylinder is fixedly connected to the inner side of the third fixed plate; push rods are movably connected to the inner sides of the electric hydraulic cylinders, and clamping blocks are fixedly connected to the inner sides of the push rods. The problems that height difference exists between adsorption equipment and materials, and manual feeding is needed are solved.

An electrohydraulic system for a work machine includes a pump, a motor fluidly coupled to the pump, a subassembly driven by the motor, and a rate-control valve fluidly coupled to the pump and the motor. The rate-control valve is movable through a range of positions. A present speed of the motor is proportional to a present position of the rate-control valve. The present position of the rate-control valve is adjustable by varying a current supplied to the rate-control valve. The supply of current to the rate-control valve is adjusted based on the difference between the present speed of the motor and a target speed of the motor.

The utility model provides a shell-and-tube heat exchanger welding tool, and relates to the technical field of heat exchanger welding tools, the shell-and-tube heat exchanger welding tool comprises a fixed platform which is sleeved outside a tube plate, the back of the fixed platform is provided with a locking piece which is matched with the back of the tube plate, and a welding head is movably mounted on a welding assembly. According to the heat exchange device, the heat exchange tube is inserted into the back of the tube plate, then the tube plate is stably sleeved with the fixing platform, the supporting rod can be driven to rotate in the front end of the fixing platform through the electric gear discs at the two ends of the supporting rod, and the linear motor can move on the supporting rod; the electric hydraulic rod can drive the welding head to stretch forwards and retract, the welding head can flexibly move on the face of the tube plate, multi-angle welding can be carried out, after a single heat exchange tube is welded, welding of a next heat exchange tube can be carried out, coherent multi-angle welding can be carried out, mounting and dismounting are very easy and convenient, and the welding efficiency is improved. And automatic welding can be carried out.

The invention discloses an infant wet tissue fabric thickness gauge based on an intelligent sensor, and relates to the technical field of cloth thickness detection devices. The baby wet tissue fabric thickness gauge based on the intelligent sensor comprises a base, the top of the base is fixedly connected with a thickness gauge, and the inner side of the thickness gauge is fixedly connected with an electric hydraulic rod; the rear side of the electric hydraulic rod is fixedly connected with a first fixing block, the interior of the thickness gauge is fixedly connected with a first hydraulic block, the bottom of the first hydraulic block is fixedly connected with a second hydraulic block through a first hose, the front side of the thickness gauge is fixedly connected with a supporting plate, the supporting plate is slidably connected with a first sliding block, and the top of the first sliding block is fixedly connected with a second pushing block. The top of the second push block is movably connected with a second hydraulic block, and the second hydraulic block is movably connected with the roller through a transmission piece. When the baby wet tissue fabric thickness gauge based on the intelligent sensor is used, the electric hydraulic rod is started, the roller is made to move downwards and rotate, and therefore the wrinkle phenomenon of cloth is avoided.

The invention relates to the technical field of plastic recycling, in particular to a vacuum cup accessory forming mold which comprises a workbench, four electric hydraulic rods are installed at the upper end of the workbench, output shafts of the four electric hydraulic rods are jointly and fixedly connected with an upper convex plate mold, and the lower end of the upper convex plate mold is slidably connected with a lower gravure mold. The lower end of the lower gravure die is fixedly connected with the workbench, an assembling groove is formed in the inner side of the lower gravure die in a clamped mode, a pop-up mechanism used for popping up accessories is arranged on the inner side of the assembling groove, and a material taking mechanism used for processing the formed accessories is arranged at the upper end of the lower gravure die. A flexible gasket and a gradually-changed tripping structure are arranged through the pop-up mechanism, so that the situation that a recycled material buckle is brittle and fractured due to hard ejection is avoided, and the short plate with insufficient toughness of the recycled material is adapted; the problem of local adhesion caused by uneven components of recycled material products is solved, lossless demolding is achieved, and the forming loss of the recycled material products is reduced.

The present disclosure relates to a brake system and a method of controlling the same, the brake system including first and second wheel speed sensors respectively installed in wheels of a vehicle, electrohydraulic brakes respectively installed in front wheels of the vehicle, electromechanical brakes (EMBs) respectively installed in rear wheels of the vehicle, a first controller configured to perform braking control on the electrohydraulic brakes and the electromechanical brakes based on first wheel speed signals outputted from the first wheel speed sensors of the wheels, and a second controller configured to perform braking control on the electrohydraulic brakes and the electromechanical brakes based on second wheel speed signals outputted from the second wheel speed sensors of the wheels in response to a failure of the first controller.

This utility model discloses a rear-mounted sweeping device for a road milling machine with debris collection function, belonging to the technical field of sweeping devices. It includes a fixed plate, with a base plate fixedly connected to the lower end of one side of the fixed plate. An electric hydraulic rod is provided at the upper end of the base plate, and a vertical plate is provided at the output end of the electric hydraulic rod. A top plate is fixedly connected to the upper end of the vertical plate, and a lifting plate is provided below the top plate. A rotating shaft is rotatably connected to the lower end of the lifting plate, and a turntable is fixedly connected to the lower end of the rotating shaft. A wire brush is fixedly connected to the base of the turntable, arranged in a ring. A support leg is located at the center of the wire brush, with its upper end fixedly connected to the bottom of the turntable, and a roller rotatably mounted at its lower end. This utility model can adapt to road surface undulations. Through the linkage design of the roller and the support leg, when the road surface is uneven, the roller rolls along the ground, causing the lifting plate to float up and down, ensuring a uniform sweeping effect and improving sweeping efficiency.

The invention provides an automatic positioning and punching device for brake drum production, and relates to the field of brake drums, the automatic positioning and punching device comprises a device body, a power interface is embedded in the back surface of the device body, and the upper surface of the device body is connected with a punching part. A positioning driving machine in the positioning piece utilizes a gear transmission structure to drive a positive and negative screw rod to drive a positioning clamping arm to achieve precise movement, high-precision fixing of the brake drum can be achieved in cooperation with preliminary positioning and supporting of a machining ring groove and an electric telescopic rod, position deviation caused by workpiece shaking in the punching process is effectively avoided, and the punching efficiency is improved. The product machining precision is greatly improved, punching parameter setting and automatic positioning can be completed through a touch panel, manual intervention is reduced, the labor intensity of operators and the skill requirements are reduced, meanwhile, an electric hydraulic telescopic rod in a punching piece can accurately control the feeding amount of a drill bit, and in combination with stable operation of a punching motor, the punching precision is greatly improved. And the consistency of the punching depth and the hole diameter is ensured.

The utility model belongs to the technical field of metal forming machining, and particularly relates to an energy-saving metal forming press machine which comprises a base, an intermittent rotating mechanism is arranged at the upper end of the base, and the upper side of the intermittent rotating mechanism is movably connected with a machining table internally provided with a connecting hole. According to the device disclosed by the utility model, the electric hydraulic rod I drives the pushing plate to move downwards, so that the rotating shaft I can be driven to rotate under the action of the gear, the toothed plate, the worm gear and the worm which are arranged; furthermore, the effect of driving a rotating push disc to rotate by one circle can be achieved under the cooperation of a chain wheel I, a chain wheel II, a rotating shaft IV, a bevel gear I, a bevel gear II and a rotating shaft III, and the rotating shaft II can be driven to rotate under the cooperation of an arranged intermittent rotating plate in the process of driving the rotating push disc to rotate; and then the process of interchanging the positions of the three forming cylinders can be achieved under the cooperation of the arranged circular mounting plate.

The utility model relates to the field of packaging material preparation, and discloses a hot-press fitting high-airtightness composite packaging material preparation device which comprises a hot press body, the left side and the right side of the hot press body are each of an opening structure, two mounting bases are fixedly mounted on the inner wall of the top of the hot press body, and electric hydraulic cylinders are fixedly mounted at the bottoms of the two mounting bases; and pressure sensors are fixedly installed at the output shaft ends of the two electric hydraulic cylinders correspondingly, U-shaped plates are fixedly installed at the bottoms of the two pressure sensors correspondingly, first pressing rollers are rotationally installed in the two U-shaped plates correspondingly, and two second pressing rollers are rotationally installed in the hot press body. Compared with the prior art, the multi-layer hot-press laminating machine has the following advantages and effects that integrated operation of preheating, primary hot-press laminating and secondary hot-press laminating of multiple layers of films can be achieved in sequence, molecule bonding between the layers of films is more sufficient, residual air between the layers can be extruded out, the overall laminating effect is improved, and the airtight performance of a packaging material is improved.

The utility model relates to the technical field of non-woven fabric smoothing, and discloses a non-woven fabric smoothing device which comprises a machining table, a connecting frame is fixedly connected to the top end of the machining table, a first electric hydraulic cylinder is fixedly connected to the top end of the inner wall of the connecting frame, and the driving end of the first electric hydraulic cylinder is fixedly connected with a connecting table. A second motor is fixedly connected to the rear end of the connecting table, a smoothing wheel is connected to the driving end of the second motor through a correcting set, fixing plates are fixedly connected to the left end and the right end of the machining table correspondingly, a first motor is fixedly connected to the rear end of the fixing plate at the left end, and a transmission pipe is fixedly connected to the driving end of the first motor. The front end of the transmission pipe is connected with an outer supporting plate through a supporting set. According to the utility model, through three-dimensional cooperative control of height, pressure and amplitude, flexible contact of non-woven fabrics with different gram weights is ensured, multidirectional stress wrinkles in high-speed production can be eliminated, rapid unloading of coiled materials with different diameters is ensured, and fiber layer damage caused by traditional knocking and dismounting can be avoided.

This invention discloses a heat treatment device for processing cast steel parts, belonging to the field of cast steel casting technology. The proposed solution includes a heat treatment mechanism with a mold storage mechanism. The invention uses an electric hydraulic rod to push the outer cover downwards, causing the soft structural layers to align with the support platform, thus sealing the multi-layered outer frame. This allows for heat treatment via a heater and also provides insulation. Next, the outer cover drives a limiting frame upwards to the second outer frame position, moving the lower crossbar to the upper crossbar position. The limiting frame then continues upwards, disengaging from the lower crossbar, allowing the lower crossbar to move downwards under gravity. Finally, the limiting frame moves downwards again and engages with a spring and locking groove, smoothly separating the bottom outer frame and transferring it to the center of the support platform. This bottom-up approach facilitates sequential extraction from below, improving ease of removal.

The utility model discloses an electronic communication cable cutting device which is characterized in that the upper surface of a cutting table is fixedly connected with a fixed rod, the interior of the fixed rod is movably connected with a movable rod, the surface of the upper end of the movable rod is fixedly connected with a movable table, and the upper surface of the movable table is fixedly connected with an electric hydraulic rod; the output end of the electric hydraulic rod penetrates through the fixing table and is fixedly connected with a first shearing blade, a guide plate is arranged on the upper surface of the cutting table, the second shearing blade is embedded in the surface of the guide plate, a fixing block is fixedly connected to the side face of the cutting table, and an electric telescopic rod is fixedly connected to the inner side face of the fixing block. And the output end of the electric telescopic rod is fixedly connected with a clamping plate, a guide wheel is arranged on the surface of the front end of the cutting table, the situation that the cable deviates in the moving process, and consequently notches of the cable are irregular when the cable is cut is avoided, and the practicability and adaptability of the cutting equipment are improved.

The utility model discloses marine diesel engine nozzle alloy steel bar production equipment which comprises a base, a U-shaped frame is fixedly connected to the upper surface of the base, and a cutting assembly is arranged in the U-shaped frame. The cutting assembly comprises an electric hydraulic push rod installed in an installation hole formed in the upper surface of the U-shaped frame, a built-in plate fixedly connected to the end of an output shaft of the electric hydraulic push rod and a balance weight plate arranged on one side of the built-in plate, a barrier plate is arranged above the built-in plate, and the barrier plate is fixedly connected to one side of the balance weight plate. According to the cutting device, the diesel engine nozzle alloy steel bar can stop moving after moving to a proper position, the cutting procedure of the diesel engine nozzle alloy steel bar is completed by moving the rotating cutting disc downwards, the cutting position of the bar can be adjusted, the cutting device is suitable for cutting bars of different lengths, clamping and fixing of the alloy steel bars of different sizes are achieved, and the working efficiency is improved. And the universality and adaptability of the cutting equipment are further improved.

The utility model provides an automobile dashboard covering body double-angle elastic block demoulding mould which comprises a lower mould base and an upper mould base, the upper mould base is arranged at the top end of the lower mould base in a matched mode, a mould cavity is formed between the lower mould base and the upper mould base, an elastic block groove is formed in the side face of the mould cavity, a metal elastic block is connected in the elastic block groove in a rotating mode, and the metal elastic block is connected with the lower mould base in a rotating mode. And assembly holes are formed in the two sides of the top end of the metal elastic block correspondingly, inclined ejection columns are connected into the two assembly holes in a nested mode correspondingly, and reset springs are fixedly installed in the two assembly holes correspondingly. The metal elastic block is arranged on the side face of the die cavity, when the upper die base and the lower die base are separated, the metal elastic block pulls the T-shaped sliding block to slide in the T-shaped sliding groove through the connecting rod at the moment, and due to the pulling force of the connecting rod and the cooperation of pulling the connecting rod through the electric hydraulic cylinder, the metal elastic block obliquely rotates; therefore, the metal elastic block is separated from the mold cavity, and quick demolding is facilitated.

The utility model relates to the technical field of oil extraction devices, in particular to an oil extraction device for improving the yield of a multistage fractured horizontal well, which comprises an oil extraction fixing frame, a data control mechanism is fixedly connected to the middle of the oil extraction fixing frame, a suction mechanism comprises an electric hydraulic cylinder, and a piston is fixedly connected to the bottom end of the electric hydraulic cylinder. In order to increase the liquid outlet amount of oil in the multi-stage fractured horizontal well during oil extraction, firstly, the sealing closing base is buckled on the multi-stage fractured horizontal well, and then negative pressure suction is conducted on the multiple negative pressure devices arranged on the side of the oil extraction base, so that when the negative pressure devices increase the negative pressure in the oil extraction base, the liquid outlet amount of the oil in the multi-stage fractured horizontal well is increased; therefore, oil in the multi-stage fractured horizontal well can be increased and extracted conveniently, and the amount of discharged oil is controlled through the arranged adjusting valve and the arranged pressure relief switch.

The utility model discloses intelligent crane, including portal, and the lateral welding of portal upper end is provided with crosspiece to be located crosspiece middle end downside's lifting tool, still include: electric sliding rail, its setting respectively in crosspiece left and right two ends inside, and the outside end of electric sliding rail is connected with electric sliding block, the inside end fixed mounting of electric sliding block has reinforcing crossbeam, and the middle part of reinforcing crossbeam is penetrated and is set up prefabricated through -slot, the bearing block is installed in the inside end of reinforcing crossbeam, and the lower end middle part of bearing block is connected with electric hydraulic rod, and the output of electric hydraulic rod is connected with lifting tool each other, the lower end vertex angle department fixed mounting of lifting tool has the lifting ring, the front end outside fixed mounting of bearing block is located in the transmission rack in reinforcing crossbeam. This intelligent crane has good accurate positioning function, and intelligent automation degree is high simultaneously, reduces manpower resource, and safe and reliable, avoids the occurrence of safety accident.

A running gear assembly for a vehicle includes an inner flange, an optional brake member assembly, and a unit hub. The inner flange may be connected to either an axle or an independent suspension member. The brake member assembly—when present—may be any type of brake member assembly commonly used for vehicles, including—but not limited to—electrically, hydraulically, or mechanically actuated drum brakes and hydraulically actuated disc brakes. The unit hub allows the wheel and tire assembly to connect to the vehicle without the need for a spindle.

The invention discloses a replacement kit for a railway wagon damping system, and belongs to the technical field of railway wagon damping system maintenance equipment. The set is composed of a self-locking hydraulic pickaxe, a supporting tool, a positioning pin, a tightener, a portable electric hydraulic pump, a lifting protection device and a pillow spring fork, and all the parts are detachably connected through the positioning pin, an oil pipe and the like. The supporting tool adopts a symmetrical design and is provided with a lug, and the self-locking device and the tightener of the self-locking hydraulic pickaxe are matched, so that the pickaxe can be prevented from being broken in the jacking process; the lifting protection device comprises a first lifting protection device and a second lifting protection device which provide safety protection at the highest lifting position and the lowest falling position of the end head of the swing bolster respectively. According to the set, sleeper spring replacement and side frame stand column wearing plate replacement can be completed at the same time, online maintenance can be achieved without picking up, the problems that existing equipment is single in function, narrow in application range, low in maintenance efficiency and large in potential safety hazard are solved, and the set is suitable for various railway wagon bogies.