803results about "Pump assemblies" patented technology

A linear actuator system includes a linear actuator and an integrated pump assembly connected to the linear actuator to provide fluid to operate the linear actuator. The integrated pump assembly includes a pump with two fluid drivers, each fluid driver comprising a prime mover and a fluid displacement assembly to be driven by the prime mover such that fluid is transferred from a first port of the pump to a second port of the pump. The pump assembly also includes two valve assembles to isolate the pump from the system. The linear actuator system also includes a controller that establishes the pump in a normal mode of operation in which the prime movers are independently driven and switches to a fail-safe mode of operation in which only one prime mover is operated.

The invention provides a hydraulic oil tank with high cleaning performance, which relates to the technical field of hydraulic oil tanks and comprises a tank body, an oil pan and an oil tank cover, an oil return pipe and an oil suction pipe are respectively arranged at two ends of the tank body, an oil return cavity, an overflow cavity and an oil suction cavity are arranged in the tank body, the oil pan is arranged at the bottom of the tank body, and the oil tank cover is fixedly mounted at the top of the tank body. The quick release assemblies are mounted on the outer side of the tank body, the two cleaning assemblies correspond to the oil return cavity and the oil suction cavity in the tank body in position and are mounted on the oil tank cover, and the overflow assembly corresponds to the overflow cavity in the tank body in position and is mounted on the oil tank cover. The cleaning assembly is driven to clean impurities adhering to the inner wall of the rectangular oil tank, bubbles and floating foam on the surface of the oil body are eliminated in the cleaning process, the cleaning performance of the oil tank is improved, meanwhile, the cleaning assembly is in linkage with the overflow assembly to heat the oil body, and the oil tank can meet the use requirement of the cold environment.

The invention provides an oil level monitoring and leakage early warning system for a hydraulic system of a dredger, which relates to the technical field of hydraulic system monitoring and comprises a hydraulic oil tank, an actuating mechanism assembly connected with the hydraulic oil tank through a pipeline, a data processing unit, a multi-source sensing module, an early warning module and a control module, the multi-source sensing module comprises an integrated liquid level sensor, an actuating mechanism displacement sensor group, an attitude sensor and a temperature sensor, and is used for collecting hydraulic oil level, displacement of each actuating mechanism, ship trim / heeling angle and oil temperature data in real time; the dynamic compensation calculation module is connected with the data processing unit; and the intelligent early warning module is connected with the data processing unit. Normal change and leakage can be distinguished by calculating the oil level change caused by the action of the executing mechanism and the posture of the ship, early warning is conducted in time, pollution and economic losses are prevented, and the situation that when workers inject hydraulic oil, the hydraulic oil splashes, bubbles are generated, and a hydraulic element is damaged can be prevented.

The invention discloses an integrated electro-hydraulic driving unit of a marine anchor and mooring machine. The integrated electro-hydraulic driving unit comprises an oil supplementing system, a main driving system, a control system, a safety system and a hydraulic motor, an oil supplementing pump in the oil supplementing system is connected with an oil drainage tank and communicated with a pressure oil tank in the main driving system, the pressure oil tank is communicated with a main pump in the main driving system through two third one-way valves, a port A and a port B of the main pump are communicated with a port A and a port B of a hydraulic motor respectively, and one ends of two safety valves in the safety system are connected with the port A and the port B of the main pump respectively. The other ends of the two safety valves are connected in parallel to a pipeline between the oil outlet of the pressure oil tank and the inlets of the two third one-way valves; a controller of the control system is in electric signal connection with the main motor; and an output shaft of the hydraulic motor is connected with an input shaft of the anchor windlass. Therefore, according to the design, the hydraulic pump station, the control valve and the hydraulic motor can be integrated, and the integration degree is high.

Hydraulic fluid release valve assemblies are described herein. The hydraulic fluid release valve assemblies may include a hydraulic unit base with a hydraulic fluid return channel and a hydraulic fluid release valve that is at least partially inserted in the hydraulic fluid return channel. The hydraulic fluid release valve assembly may further include a driving assembly to contact with the hydraulic fluid release valve to apply a pushing force on the hydraulic release valve to open the hydraulic fluid release valve, and an electrically powered driver connected to the driving assembly, the electrically powered driver, when actuated, causes the driving assembly to move to apply the pushing force to the hydraulic fluid release valve.

The utility model provides a lifter shell and a tractor. With the forward direction of a tractor as the front, the lifter shell comprises a body part, a first oil filling pipeline and a second oil filling pipeline, the body part is arranged on the upper end face of a gearbox in a sealed mode, and the body part can be matched with the upper end face of the gearbox to form a closed cavity used for containing hydraulic fluid; the first oil filling pipeline is arranged on the body part; the second oil filling pipeline is arranged on the side wall of the body part and extends to be communicated with the gearbox along a pipeline integrally arranged with the inner wall of the body part. The lifter shell is designed to be the independent hydraulic oil tank, independent oil supply to the lifting hydraulic system is achieved, the cleanliness and stability of the lifting hydraulic system are improved, the failure rate of the lifter can be effectively reduced, the positions of the oil filling port and the oil outlet of the lifter shell are designed, the volume and the oil loading quantity of the lifter shell are improved, and the lifting hydraulic system is more convenient to use. And the lifting force and the lifting stroke of the lifter are further improved.

The invention discloses a variable displacement mechanism in an asymmetric pump, relates to the technical field of fluid transmission and control, and aims at solving the problems that an existing variable displacement mechanism is large in auxiliary oil source pressure, high in energy consumption and poor in control stability due to the fact that a swash plate is affected by one-way torque due to the oil port pressure difference of an axial plunger pump with three flow distribution windows. The variable displacement mechanism in the asymmetric pump comprises a variable displacement cylinder, wherein the variable displacement cylinder comprises a first cylinder barrel and a second cylinder barrel which are oppositely arranged in the movement direction of a piston; the piston is arranged in the first cylinder barrel and the second cylinder barrel; the first piston rod and the second piston rod are respectively arranged at two ends of the piston; the first piston rod is sleeved with the first stiffness spring, the second piston rod is sleeved with the second stiffness spring, and the stiffness of the first stiffness spring is larger than that of the second stiffness spring; and the at least two stop blocks are fixed on the inner wall of the first cylinder barrel. The pressure of the auxiliary oil source in the asymmetric pump is reduced, and the control stability is improved.

The invention discloses a supercritical CO2 vulcanizing machine hydraulic station heat dissipation and heat recovery system, which relates to the technical field of hydraulic systems, and comprises a hydraulic oil tank unit and a gasification coil pipe arranged in a hydraulic oil tank, the temperature sensor is used for monitoring the hydraulic oil temperature in real time; the flow regulating valve is connected with the gasification coil pipe; wherein the temperature control system comprises a PLC (Programmable Logic Controller) and an upper computer, and the PLC is used for receiving data acquired by the temperature sensor, transmitting the acquired data to the upper computer through a modbus protocol for data processing and executing heat dissipation control; the dynamic temperature prediction module and the supercritical CO2 generation unit are connected through a pipeline, and the supercritical CO2 generation unit and the hydraulic oil tank unit are connected through a pipeline; and the heat energy recovery and utilization unit comprises a high-pressure coil pipe and a heat storage medium used for absorbing and storing heat transferred by the high-pressure coil pipe, centralized monitoring and management of equipment are conveniently achieved, and meanwhile the heat energy centralized recovery efficiency and scale benefits are improved.

A load-controlled hydraulic supply for an attachment attached to an agricultural tractor includes a hydraulic high-pressure source providing a volume flow in a supply line, a return line leading to a hydraulic reservoir, and a load-indicating line connected to a device for pressure limiting. The volume flow is adjusted based on pressure feedback prevailing at the load-indicating line.

The utility model discloses a defoaming type oil tank with a heating device, which comprises an oil tank body, a partition plate and the heating device, the partition plate is arranged in the oil tank body to divide the oil tank body into an oil absorption area and an oil return area, the oil absorption area and the oil return area are communicated with each other, a heating area is formed in the communicated area of the oil absorption area and the oil return area, and the heating device is arranged in the heating area. The heating device is installed on the oil tank body and located in the heating area. According to the defoaming type oil tank with the heating device, the partition plate is arranged to divide the oil tank into the oil suction area and the oil return area, so that flowing of oil in the oil tank becomes more regular, bubbles are reduced, the heating device is arranged at the communicating position of the oil suction area and the oil return area, and therefore the heating effect is improved. And oil liquid entering the oil absorption area subsequently can be effectively heated, it is ensured that the oil liquid needing to be circulated subsequently is heated, and the heating effect is better.

The invention discloses a supercritical CO2 vulcanizing machine hydraulic station heat dissipation and heat recovery system, which relates to the technical field of hydraulic systems, and comprises a hydraulic oil tank unit and a gasification coil pipe arranged in a hydraulic oil tank, the temperature sensor is used for monitoring the hydraulic oil temperature in real time; the flow regulating valve is connected with the gasification coil pipe; wherein the temperature control system comprises a PLC (Programmable Logic Controller) and an upper computer, and the PLC is used for receiving data acquired by the temperature sensor, transmitting the acquired data to the upper computer through a modbus protocol for data processing and executing heat dissipation control; the dynamic temperature prediction module and the supercritical CO2 generation unit are connected through a pipeline, and the supercritical CO2 generation unit and the hydraulic oil tank unit are connected through a pipeline; and the heat energy recovery and utilization unit comprises a high-pressure coil pipe and a heat storage medium used for absorbing and storing heat transferred by the high-pressure coil pipe, centralized monitoring and management of equipment are conveniently achieved, and meanwhile the heat energy centralized recovery efficiency and scale benefits are improved.

A pneumatic system for a vehicle, comprising an air compressor for pressurizing an air tank. A flow passage extending from compressor is bifurcated to a first valve and to a second valve. The first valve has a first state preventing air from passing to the air tank, and has a second state allowing air to pass to the air tank. In a first mode of operation of the pneumatic system, the first vale is in said first state and the second valve controls air flow from the compressor to ambient environment. The second valve is configured to change to, or remain in, an open state when the pressure of the air upstream of the second valve is higher than a predetermined threshold, and to change to, or remain in, a closed state when the pressure of the air upstream of the second valve is lower than the predetermined threshold.

The invention discloses a high-low pressure adjustable constant-temperature hydraulic device, and belongs to the technical field of hydraulic equipment, the high-low pressure adjustable constant-temperature hydraulic device comprises an oil tank main body, a pressure compensation mechanism, a pressure relief mechanism, a vacuum mechanism, a condensation mechanism and a heat dissipation mechanism, the top of the oil tank main body is provided with a hydraulic pump, and one end of the hydraulic pump is connected with a pressure gauge; an oil outlet is formed in the other end of the pressure gauge, the hydraulic pump communicates with the interior of the oil tank body, and an oil return opening is formed in the other end of the top of the oil tank body. The device has the beneficial effects that when the internal pressure of the oil tank is increased, redundant air pressure is exhausted to the pressure bin through the connecting pipe, the first piston moves upwards to store air, shell deformation is avoided, when the pressure is normal, the first piston resets to the middle position by means of spring force, and when the pressure is reduced, the connecting pipe generates suction force, the first piston moves downwards, air compensates the air pressure of the oil tank, and balance is kept; the mechanism effectively isolates internal and external air straight-through, and keeps the internal pressure of the oil tank stable.

The invention discloses a hydraulic system and a chemical fiber grade titanium dioxide filter pressing device, and relates to the technical field of hydraulic systems. The hydraulic system comprises a circulating pump, an oil tank and an oil cylinder, an oil inlet pipe is arranged between the oil cylinder and the circulating pump, an oil return pipe is arranged between the oil cylinder and the oil tank, an oil pumping pipe is fixedly connected between the circulating pump and the oil tank, and the hydraulic system further comprises a temporary storage tank fixed to the top of the oil tank and communicated with the lower end of the oil return pipe; and the air exhaust box is fixed to the top of the oil tank and communicates with the temporary storage box through a first electromagnetic valve, and the side wall of the air exhaust box is fixedly connected with a second electromagnetic valve. According to the hydraulic system and the chemical fiber grade titanium dioxide filter pressing device, bubbles in hydraulic oil can be conveniently removed, meanwhile, the cooling efficiency of the hydraulic oil in the oil tank can be higher, the cooling effect is better, and the using effect and the service life of the hydraulic system are guaranteed.

The utility model provides a broken line type efficient multi-cutter shearing machine rapid liquid filling hydraulic system which comprises an oil pump motor set component system used for providing hydraulic energy, and the oil pump motor set component system is connected with a shearing oil cylinder used for executing shearing action and a control valve component system of the shearing oil cylinder. The oil pump motor set component system is connected with a material pressing oil cylinder used for executing the material pressing action and a control valve component system of the material pressing oil cylinder. The shearing oil cylinder and the control valve component system thereof and the pressing oil cylinder and the control valve component system thereof are simultaneously connected with the liquid filling component system; the liquid filling component system is connected with the air source component system; and the circulating cooling component system is connected with the main oil tank through an oil return pipe. The utility model provides an auxiliary return stroke control system while overcoming the negative pressure liquid filling defect of the traditional liquid filling system. And the effective working efficiency of the gantry type scrap steel shearing machine is effectively improved. Therefore, the equipment capacity is improved, and the environment-friendly effects of energy conservation and emission reduction are achieved.

A robot includes a body, a first robotic arm physically coupled to the body, and a first discrete hydraulic system comprising a first plurality of hydraulic components. The first robotic arm includes a first end effector. The first hydraulic system is operable to control the first end effector. The first plurality of hydraulic components are integrated with the first robotic arm. In some implementations, the robot includes a second robotic arm physically coupled to the body, and a second discrete hydraulic system consisting of a second plurality of hydraulic components. The second robotic arm includes a second end effector. The second hydraulic system is operable to control the second end effector. The second plurality of hydraulic components are integrated with the second robotic arm. The second hydraulic system is hydraulically-isolated from the first hydraulic system.

A hydraulic oil-circuit system and a hydraulic jack are proposed. The hydraulic oil-circuit system includes a hydraulic cylinder, an oil loading chamber, a storage oil chamber and an oil unloading pipeline; a piston is arranged in the hydraulic cylinder and divides the hydraulic cylinder into a first hydraulic oil chamber and a second hydraulic oil chamber; the first hydraulic oil chamber has a first oil port, and the second hydraulic oil chamber has a second oil port; the first oil port and the second oil port are both in unidirectional communication with the oil loading chamber and are both in unidirectional communication with the storage oil chamber; and the oil unloading pipeline connects the oil loading chamber and the storage oil chamber.

The utility model discloses an integrated type hydraulic oil tank which comprises an integrated type hydraulic oil tank body and an installation sleeve seat, the integrated type hydraulic oil tank body is located in the installation sleeve seat, the bottoms of the two sides of the installation sleeve seat are fixedly connected with connecting bottom plates, and a connecting top plate is arranged above the connecting bottom plates. A sealing plate is hinged to one side of the connecting top plate, an elastic rubber wall is arranged between the connecting top plate and the connecting bottom plate, a supporting plate is arranged on one side of the elastic rubber wall, and a mounting groove is formed between one side of the supporting plate and the mounting sleeve seat. According to the integrated hydraulic oil tank, external vibration can be prevented from directly acting on the exterior of the integrated hydraulic oil tank body to damage the integrated hydraulic oil tank body, in addition, the ambient temperature around the integrated hydraulic oil tank body can be reduced under the action of the radiator, and the heat dissipation efficiency of the integrated hydraulic oil tank body can be improved.

An aircraft store ejector systems and subsystems thereof. Embodiments can include a two-reservoir re-pressurization system wherein a remote reservoir is used to maintain desired pressure in a local ejector reservoir. The system can include a release valve having a vent valve and valve piston. The release valve can control release of pressurized gas to a pitch control valve. The pitch control valve can be configured to distribute the pressurized gas between two or more ejector piston assemblies. One or more of the ejector piston assemblies can include multiple concentric piston stages and piston chambers, the piston chambers configured to contain a volume of gas. The ejector piston assemblies can be configured to compress the volume of gas within the piston chambers as the piston stages are extended out from the aircraft. Such compression can provide a return force to the piston stages.

The utility model provides a hydraulic station oil tank oil supplementing and exhausting integrated device, and relates to the field of hydraulic parts, the hydraulic station oil tank oil supplementing and exhausting integrated device comprises a conduction assembly, the top end of the conduction assembly is fixedly connected with a guiding assembly, the conduction assembly comprises a conduction body and a second connecting ring, and the bottom end of the conduction body is provided with a circulation opening; the guiding assembly comprises a guiding pipe, one end of the guiding pipe is fixedly connected to the through conductor, an open hole is formed in the outer side of the guiding pipe, a connector is arranged at the open hole, and the outer side of the connector is sleeved with a dustproof cap. By means of the design, the problems that an oil tank of a hydraulic station is slow in oil supplementing, air is prone to being mixed in the oil supplementing process, particulate pollutants are prevented from invading a system through an oil tank breathing opening, and oil pollution is caused are effectively solved, and the device is easy to manufacture, low in machining cost and high in field practicability.

The invention discloses a double-unit hydraulic pump station for a coal mine aerial passenger device, and relates to the technical field of double-unit hydraulic pump stations, the double-unit hydraulic pump station comprises an oil tank mechanism, the oil tank mechanism comprises an oil tank, a strong magnet is arranged at the bottom of an inner cavity of the oil tank, an oil return filter is arranged at the top of the oil tank, and a net type filter is arranged in the oil tank; and the power device is arranged at the top of the oil tank mechanism and comprises a motor. The design that continuous operation is guaranteed through double-machine redundancy is adopted, the power device is provided with two sets of independent motors, hydraulic oil pumps and matched assemblies, the single set operates under the normal working condition, when one set breaks down, oil ways of a main oil pipe and an oil return pipe are rapidly switched by switching a reversing valve of the assembly, and the other set immediately works; the overhead man-riding device is prevented from being shut down due to single-machine faults, maintenance without shutdown is achieved, maintenance can be conducted under the condition that operation of the other set is not affected after fault sets are switched, and normal use of the man-riding device does not need to be interrupted.

A composite vessel and fitting for a through-wall penetration having an exposed end grain. The fitting includes a sealing surface arrangement that seals against the composite vessel and prevents leakage of the vessel contents while protecting the end grain from exposure to internal fluid and / or external environment. The fitting includes an outer part, an inner part, and a through-wall part extending between the inner and outer parts across the penetration. An outer seal arrangement includes an outer seal having a first sealing surface that seals against the outer surface of the composite vessel to restrict environmental contaminants migrating to the end grain. An inner seal arrangement includes at least one inner seal having second and third sealing surfaces. The second sealing surface seals against the inner surface of the composite vessel and the third sealing surface seals a leak path or interface between the inner part and through-wall part to restrict internal fluid migrating to the end grain.

The utility model belongs to the technical field of oil tank machining, and particularly relates to an integrally-bent hydraulic oil tank which comprises a tank body, a base is fixedly installed at the bottom of the tank body, the tank body is integrally formed and comprises a plurality of side plates connected end to end, a vertical bending line is arranged between every two adjacent side plates, and each side plate is bent towards the same side along the corresponding vertical bending line. According to the utility model, a steel plate is subjected to one-time blanking and is integrally bent and formed, so that the number of welding seams of the oil tank is reduced, the production process is simplified, and the product quality is improved.

A hydraulic power unit includes a reservoir containing hydraulic fluid, a main output, a pressure sensor, at least one active valve hydraulic pump and at least one passive valve hydraulic pump. A main flow of the hydraulic fluid is discharged through the main output. The pressure sensor includes a pressure signal that is indicative of a pressure of the main flow. Each active valve hydraulic pump is configured to drive a first flow portion of the main flow from the reservoir to the main output when the pressure signal is below a first pressure setpoint. Each passive valve hydraulic pump is configured to drive a second flow portion of the main flow from the reservoir to the main output when the pressure signal is below a second pressure setpoint.

The electro-hydraulic integrated push rod comprises a hydraulic cylinder and a drive control assembly which are sequentially connected, the hydraulic cylinder comprises a cylinder barrel assembly, and a piston rod is arranged in the cylinder barrel assembly in a sliding mode; the driving control assembly comprises a driving module, a valve block and an oil tank assembly, and the valve block is mounted at the tail end of the oil tank assembly; the driving module comprises a driving motor, the driving motor is arranged at the rear end of the valve block, a motor shaft of the driving motor penetrates through the center of the valve block to be connected with a bidirectional gear pump, and the bidirectional gear pump is arranged in the oil tank assembly; the system further comprises a PLC control system. The PLC control system comprises a PLC and a power module. The hydraulic cylinder and the driving control assembly are arranged in a split mode, meanwhile, the valve block is arranged on the outer side of the oil tank, the requirements that an electro-hydraulic integrated push rod is compact in structure and easy to disassemble and assemble are met, maintenance and replacement are convenient, and the characteristics that an electric push rod is small in size and flexible in configuration and the characteristics that an oil hydraulic cylinder is stable in work, high in reliability and small in high-speed impact force can be integrated.

The invention belongs to the technical field of filling pump equipment and provides a paste filling pump hydraulic oil tank cooling device and a control method.The paste filling pump hydraulic oil tank cooling device comprises a first heat exchange assembly and a second heat exchange assembly, the first heat exchange assembly comprises a heat exchange oil tank, a first heat exchange water path is arranged in the heat exchange oil tank, the water inlet end of the first heat exchange water path communicates with a water supply part, and the water outlet end of the first heat exchange water path communicates with a heat dissipation water tank; the second heat exchange assembly comprises a liquid outlet pipe fitting, the liquid outlet pipe fitting penetrates through the interior of the hydraulic oil tank, the water inlet end of the liquid outlet pipe fitting communicates with the water supply part, and the water outlet end of the liquid outlet pipe fitting communicates with the heat dissipation water tank; when the valve assembly is in a closed state, the water supply part supplies water to the liquid outlet pipe fitting, and when the valve assembly is in an open state, the water supply part supplies water to the first heat exchange water way and the liquid outlet pipe fitting. Two sets of heat exchange ways are arranged, the heat exchange efficiency is high, and the oil temperature in the hydraulic oil tank is kept stable in the pumping interval.

An oil filter reservoir comprising: a reservoir housing (102); a filter (104) within the housing (102) dividing the housing (102) into an oil inlet chamber (112) and an oil outlet chamber (114); a housing inlet in communication with the inlet chamber (112); a housing outlet (110) in communication with the outlet chamber (114); wherein the filter (104) includes a permeable wall (116) and a bypass valve (118), the bypass valve (118) opening in response to higher oil pressure and volume in the inlet chamber (112) to allow a portion of the oil to bypass the permeable wall (116) and be released from the bypass valve (118) into a bypass chamber (104);anda baffle (106) in the outlet chamber (114), the baffle (106) being spaced from the bypass valve (118), the baffle (106) further separating the outlet chamber (114) into a reserve chamber (202) and the bypass chamber (204), the baffle (106) including openings (206) allowing limited oil flow therethrough between the bypass chamber (204) and the reserve chamber (202), the housing outlet (110) and the bypass valve (118) being in fluid communication with the bypass chamber (204);

The utility model relates to the technical field of integrated hydraulic system oil tanks, in particular to a sealable hydraulic system oil tank which comprises an oil tank body, a liquid level meter is arranged at one end of the oil tank body, a one-way valve is arranged at one end of the top of the oil tank body, and a release valve is arranged at the other end of the top of the oil tank body. A pressure gauge is arranged at the top of the oil tank, and two conveying pipes are arranged at the output end of the oil tank. The oil tank can be adjusted and changed between an open state and a closed state, can be overturned and used under different conditions, and is simple in structure and low in failure rate.

A hydraulic regenerative braking system is provided for capturing energy from a vehicle using hydraulic fluid during a braking event. The system captures kinetic energy from an axle of the vehicle and stores the kinetic energy as hydraulic potential energy. That is, the system captures rotational energy as hydraulic potential energy in the accumulator. The hydraulic regenerative braking system also releases the hydraulic potential energy as kinetic energy. During braking, kinetic energy is transferred from an axle of the vehicle to the gearbox and then from the gearbox to the hydraulic pump. The hydraulic pump uses kinetic energy to pump hydraulic fluid to the accumulator, increasing hydraulic potential energy stored in the accumulator. During travel, hydraulic fluid is released from the accumulator to the hydraulic pump, thereby generating kinetic energy, which is then transferred to the axle of the vehicle via the gearbox.

The utility model relates to the field of hydraulic pressure, and discloses a hydraulic oil tank with a double-exhaust function, which comprises a tank body, lower pipe bodies are mounted on the left side and the right side of the top end of the tank body through mounting pieces and are used for exhausting gas in the hydraulic oil tank, fixing blocks are fixedly connected to the bottom ends of the lower pipe bodies, and baffles are arranged at the bottom ends of the fixing blocks and are used for fixing the lower pipe bodies. And the amount of oil entering the lower pipe body due to inertia during braking is reduced through a baffle, the top end of the lower pipe body is fixedly connected with a blocking cavity, the inner wall of the blocking cavity is fixedly connected with a plurality of connecting blocks, the opposite ends of the connecting blocks are fixedly connected with check blocks, and oil entering the lower pipe body is blocked through the check blocks and only gas is exhausted. According to the utility model, when the vehicle suddenly stops in any direction to generate oil return, the corresponding lower pipe body is used for exhausting air, an overlong upper pipe body is not needed to prevent hydraulic oil from overflowing, and foreign matters can be prevented from falling into the box body in the daily use process.