75 results about "Miniature hydraulics" patented technology

A feedback controlled artificial sphincter system for anus is composed of an internal unit consisting of wireless communication module, the artificial sphincter which comprises pressure sensing bag, miniature pressure sensor, clamping bag, clamping pressure sensor and liquid bag, the artificial sphincter controller which comprises the regulating circuits for said sensors, miniature hydraulic pump and its driver, and single-chip microprocessor, and the power module, and an external unit consisting of wireless transmitting coil on skin, harmonic oscillator, wireless communication module, and single-chip microprocessor system.

The invention relates to an irregular workpiece fixture for machining metal conveniently. The irregular workpiece fixture comprises a fixture structure and an operation displayer; the fixture structure is composed of a detection component and a clamping component; the periphery of the detection component is uniformly provided with detectors; the four corners of the clamping component are all provided with hydraulic air cylinders; one ends of miniature hydraulic air cylinder bodies are connected with circular-arc-shaped baffles; one side of each circular-arc-shaped baffle is provided with the two miniature hydraulic air cylinder bodies; one ends of the miniature hydraulic air cylinder bodies are connected with fixed baffles; one side of the interior of the operation displayer is provided with a first hydraulic pneumatic box; one side of the first hydraulic pneumatic box is provided with a second hydraulic pneumatic box; and one side of the second hydraulic pneumatic box is provided with a detection analysis and processing device. By using the convenient irregular workpiece fixture for machining the metal conveniently, an irregular workpiece can be quickly fixed, so that the machining speed is increased, and the labor production efficiency is improved; and automation design is achieved, manual operation is omitted, and the workpiece position can be adjusted according to different machining requirements.

An LED advertising screen cleaning machine comprises longitudinal guide rails and a transverse guide rail. A cleaning trolley is arranged on the transverse guide rail. The longitudinal guide rails are sleeved with the transverse guide rail. The cleaning trolley is driven under traction of a motor to move up and down along the longitudinal guide rails. According to the LED advertising screen cleaning machine, the longitudinal guide rails can be spliced, and cleaning requirements of LED advertising screens of different areas can be met; a micro hydraulic system provides a cleaning agent for cleaning of an LED advertising screen, double brushes abut against the LED advertising screen and rotate at a high speed, dust on the LED advertising screen can be removed efficiently, and the display brightness of the advertising screen is improved; and compared with the mode that the LED advertising screen is cleaned by high-altitude workers, cleaning operation is conducted through the LED advertising screen cleaning machine, the cleaning operation efficiency is greatly improved, and meanwhile, safety of workers can be guaranteed.

The invention provides a mold roller gap stepless automatic regulation device of a vertical annular mold straw briquetting machine. The mold roller gap stepless automatic regulation device comprises an upper press plate, a grinding disc, an eccentric shaft A, an eccentric shaft B, a vertical main shaft, a PLC (programmable logic controller), an intermediate relay, an electromagnetic valve, a miniature hydraulic pump, an oil tank, a branch oil pipe A, a branch oil pipe B, a push rod and a tray. Strain force sensors sense strain of the eccentric shaft A and the eccentric shaft B in real time and transmit information to the PLC, the PLC controls the electromagnetic valve and the intermediate relay to work, further, the extension and retraction of the push rod are controlled through oil pressure, a mold roller gap is automatically regulated in a stepless way, the effective regulation on the mold roller gap is realized, the stability of forming extrusion force among grinding rollers is ensured, in addition, the briquette forming quality and the briquette forming uniformity are improved, meanwhile, the excessive abrasion among mold rollers is also reduced, the service life of each mold roller is prolonged, and the energy consumption during the production is also reduced.

The invention discloses a miniature hydraulic drive system used for an ankle joint artificial limb. The miniature hydraulic drive system comprises an electromotor, a hydraulic pump, a first check valve, a second check valve, a first energy accumulator, a second energy accumulator, a first normally-opened switching valve, a second normally-opened switching valve, a first normally-closed switching valve, a second normally-closed switching valve and a double-ejection-rod hydraulic cylinder. In the miniature hydraulic drive system, by means of unceasing work of the motor and energy storage of the energy accumulators, the requirement for the peak power of the motor can be reduced; and the power consumption is lowered during long-term walking so that the cruising ability can be improved. In the miniature hydraulic drive system, the direct-current motor and the hydraulic pump unceasingly work in the whole movement process, the energy utilization efficiency of the system is improved, frequent start, stop and reversing of the motor are avoided, and therefore the usability of the motor is improved, and the service life of the motor is prolonged.

The invention discloses a household fixed ground wiping device. The household fixed ground wiping device comprises a mounting plate, wherein a wiping mechanism is arranged on the front surface of the mounting plate, a commercial power connector is arranged on the lower surface of the mounting plate, a controller is arranged on the upper surface of a rectangular tank, the supply terminal of the controller is connected with the commercial power connector through a connector, and the output end of the controller is respectively connected with a motor-driven carrier, a miniature electromotive handspike, a miniature hydraulic cylinder, a miniature linear motor number 1 and a miniature linear motor number 2 through conducting wires. The household fixed ground wiping device provided by the invention has the beneficial effects that infrared ray positioning and automatic waste water extruding is achieved, the cleaning frequency is high, manpower is released, the cleaning efficiency is improved, the use is convenient, and the novelty is strong.

A tunnel sectioned excavation simulation device for a three-dimensional centrifugal model test comprises a fixing and supporting system, a loading system, a supporting structure and a displacement monitoring system. The fixing and supporting system comprises a three-dimensional centrifugal model box, long vertical columns, a short vertical column, linkage crossbeams and a supporting crossbeam and is used for fixing the supporting structure and providing a support reaction force. The loading system comprises miniature hydraulic jacks, supporting rods and supporting cushion blocks and is positioned on the upper portion of the supporting crossbeam and in the supporting structure. The supporting structure is formed by an aluminum pipe and an arc aluminum sheet on the upper portion of the aluminum pipe, and the supporting structure is arranged above the fixing and supporting system. The displacement monitoring system comprises high-sensitivity displacement sensors and sensing extension rods and is adhered to the upper portion of the arc aluminum sheet. The tunnel sectioned excavation simulation device has advantages that ground loss ratios caused by shield tunneling can be accurately controlled and simulated, and continuous sectioned simulation of different ground loss ratios can be realized.

The invention discloses massage heat insulation clothes for pigs. The massage heat insulation clothes comprise a body part, a first front and a second front, wherein the body part is provided with a longitudinal shaft, a first side and a second side, and the first direction is opposite to the second direction; the first front is arranged on the first side of the body part, the second front is arranged on the second side of the body part, and the first front and the second front extend from the periphery of the body of a pig and are mutually fixed, and each of the body part, the first front and the second front comprises a waterproof layer, a heat insulation layer, a first massage layer, a second massage layer, an insulation layer and a fitting layer. Each first massage layer is provided with small balls connecting with a vibration motor; each second massage layer comprises a massage plate, a miniature hydraulic oil cylinder connected with the massage plate and a driving mechanism connected with the miniature hydraulic oil cylinder; each insulation layer comprises a plurality of far infrared heating pipes, a far infrared fiber layer and a power source, the far infrared heating pipes are arranged nearby the longitudinal shaft of the body part, the far infrared fiber layer made of far infrared fiber materials wrap the far infrared heating pipes, and the power source is connected with the far infrared heating pipes.

The invention discloses a positioning device with a sensing displacement monitoring function for laser welding equipment. The positioning device comprises mounting bases, clamping rings, laser locators and a base plate, wherein a base is arranged at the top end of the base plate; the mounting bases are both arranged on the two sides of the interior of the base; a screw groove is arranged in the middle of the interior of the base; screws are both fixed to the two ends of the interior of the screw groove; sliding grooves are both arranged in the two ends of the middle of the interior of the base; and a guide strip is arranged at the top of one end, far away from the corresponding screw groove, of the interior of each sliding groove. According to the positioning device with the sensing displacement monitoring function for the laser welding equipment, miniature hydraulic telescopic rods work to drive flexible clamping plates to move inwards, a part to be welded is clamped, pressure sensorscan detect the clamping pressure and transmit a pressure signal to a single-chip microcomputer, when the set pressure is reached, the single-chip microcomputer can control the miniature hydraulic telescopic rods to stop working, the clamping is completed, the manual adjustment is not needed, and the use is more convenient.

The invention belongs to the technical field of argon arc welding device, and particularly relates to an automatic argon arc welding device. The automatic argon arc welding device comprises a robot, wherein the robot is composed of a robot body, a mechanical head, mechanical arms, mechanical legs and mechanical feet, wherein a squatting and bending mechanism is fixedly installed on the inner sidesurface of each mechanical leg, and the squatting and bending mechanisms control the bending degree between the mechanical legs and the mechanical feet. Manipulators are fixedly mounted at the bottomends of the mechanical arms, the manipulators are hinged to welded pieces and clamp the welded pieces, and the manipulators drive the welded pieces to rotate. A welding mechanism is fixedly installedright in front of the robot body, and the two sides of the welding mechanism are fixedly connected with the inner side surfaces of the mechanical arms through miniature hydraulic cylinders. Accordingto the automatic argon arc welding device, through the arrangement of the welding mechanism, the effect of conducting small-amplitude swing welding on the welding seam between the welded pieces is achieved, the welded pieces rotate during welding, in cooperation with the miniature hydraulic cylinders and a telescopic hydraulic cylinder which control a welding gun, the width of the welding seam iscontrolled by the miniature hydraulic cylinders, the welding thickness of the welding seam is controlled by the telescopic hydraulic cylinder, and then the effect of accurate, constant-speed and continuous welding is achieved.

The invention relates to a repeatable and quick assembly-disassembly type cooling system and a special pipeline connecting device. The cooling system comprises a compressor (1), a condenser (2), a reservoir (3), a dry filter (4), an expansion valve (5) and an evaporator (6). The cooling system is characterized in that: a first pipeline connecting device (7) is arranged between the dry filter (4) and the expansion valve (5); a second pipeline connecting device (8) is arranged between the evaporator (6) and the compressor (1); a first solenoid valve (9) is arranged on a pipeline between the first pipeline connecting device (7) and the dry filter (4); the first pipeline connecting device (7) is connected with a connecting position between the second pipeline connecting device (8) and the compressor (1) through a pipeline (11); ports of two pipeline connecting devices are respectively connected with a miniature vacuum pump (12) through a third solenoid valve (14); and control input ends of the two pipeline connecting devices (8) are connected with a miniature hydraulic station (13). The cooling system can be provided with the evaporator under the cooled environment, and can reduce the manufacturing cost and use cost greatly by adopting a direct cooling mode.

The invention discloses a track underwater feed device for aquaculture. The device comprises an annular supporting plate and an aquaculture tank body, wherein the annular supporting plate is erected above the water surface of the aquaculture tank body, the lower end of the annular supporting plate is fixedly connected with a moving part, the moving part is fixedly connected with a feed tank, the inner wall of the left side of the feed tank is provided with a feeding part, and the bottom of the feed tank is provided with a discharging mechanism. The track underwater feed device for the aquaculture has the advantages that an electric pulley and the feed tank are driven through an annular electric track, and cooperate with the discharging mechanism to perform regular feeding on the aquaculture tank body, which replaces manual feeding, reduces the labor intensity, and effectively improves the feeding efficiency; a miniature hydraulic cylinder is regularly started and controlled through a set cycle timing switch, so that the miniature hydraulic cylinder drives a baffle plate to close a discharging port regularly so as to regularly and quantitatively perform feeding on the aquaculture tank body to avoid the situation of uneven feeding.

The invention discloses an oil cylinder reversing and volume speed adjusting hydraulic system which is characterized in that a semi-closure hydraulic circuit is adopted; the hydraulic system comprises a prime motor (2b) capable of rotating bilaterally and a bilateral rotation hydraulic pump (3b); the speed of the prime motor (2b) is adjustable; the bilateral rotation hydraulic pump (3b) sucks oil from an oil tank B (1b); an oil inlet and an oil outlet of the bilateral rotation hydraulic pump (3b) are provided with a one-way valve A (4b) and a one-way valve B (5b) respectively; an oil port at one side of the bilateral rotation hydraulic pump (3b) is connected to a rod cavity of a double-acting cylinder (8b); an oil port at the other side of the bilateral rotation hydraulic pump (3b) is connected to a rodless cavity of the double-acting cylinder (8b) through a one-way valve (6b); and a hydraulic-control proportional throttle valve (7b) is arranged between an oil inlet way and an oil outlet way of the double-acting cylinder (8b). The micro hydraulic system is suitable for special-purpose minitype heavy load robots, the control is simplified, the transmission efficiency is improved, and the overall appearance and weight of the hydraulic system are reduced.

The invention discloses an intelligently-controlled electric dressing change bracket device for medical treatment. The device comprises a base, wherein a hydraulic supporting device is arranged underthe base, a hydraulic lifting adjustment device is arranged on the upper portion the base, an accumulator device is arranged on the base, the outer side surface of a fixing cylinder is provided with acontroller frame, the controller frame is provided with a controller, a power output end of the controller is electrically connected with a miniature hydrocylinder, a miniature hydraulic oil pump, ahydrocylinder and a hydraulic oil pump, and a power connection end of the controller is electrically connected with the accumulator device. The intelligently-controlled electric dressing change bracket device for the medical treatment has the advantages that the structure is simple, and the practicability is high.

The invention discloses an intelligent and automatically controlled rotary gripping device on a mechanical arm. The device comprises a gripping platform, a rotary gripping fixing device is arranged below the gripping platform, a rotary driving device is arranged above the gripping platform, and a telescopic support device is arranged above the gripping platform. A controller is arranged outside the gripping platform, a signal receiving end of the controller is in electrical connection with an infrared distance measuring sensor and a pressure detection device, and a power output end of the controller is in electrical connection with a miniature hydraulic oil pump, a miniature hydraulic electromagnetic valve, a rotary driving device and the telescopic support device. The intelligent and automatically controlled rotary gripping device has advantages of simple structure and high practicality.

The invention discloses a curve hole machining guide device. The curve hole machining guide device is mainly composed of miniature hydraulic cylinders, upper and lower platforms, and connecting joints. According to the working principle of the curve hole machining guide device, the upper and lower platforms are connected by the three miniature hydraulic cylinders of the same model, initially, theupper and lower platforms are in a horizontal state, when one or two hydraulic cylinders are elongated, the upper platform can be made to change from the horizontal state to produce a certain includedangle state with the horizontal plane, and the included angle can be changed according to the elongation of piston rods of hydraulic cylinders. By controlling stretching and contracting amount of thepiston rods of three hydraulic cylinders, the angle size can be controlled, and then the control of the curvature radius of the operation track is controlled; and the device is precise in guide, themachining precision of a curve hole is easy to control, compared with an existing curve hole machining method, the stiffness of the guide device is high, the stability performance is high, and the structure and operation method are simple.

The invention discloses a direct-acting type proportional throttle valve which is composed of a valve body (1b), a valve core (2b), a valve sleeve (3b) and a spring (4b). The direct-acting type proportional throttle valve is characterized in that the valve core (2b) is provided with a conical surface (c) and an oil groove (G), the maximum outer diameter of the conical surface is D, the diameter of an outer circle of the valve core on the small-end side of the conical surface C is d, and D is larger than d; the valve body (b) is provided with an oil opening A and an oil opening B, the valve core (2b) and the valve body (1b) are assembled into a transition containing cavity V; spring force is applied to one end of the valve core (2b), and control force Fc is applied to the other end of the valve core; the valve sleeve (3b) is arranged on the side provided with the spring (4b). According to the direct-acting type proportional throttle valve, for a miniature hydraulic system of special purposes such as a small-size / heavy-load robot, internal leakage of the proportional throttle valve in the closed state is greatly reduced; the internal leakage is not changed obviously when the fit clearance of a valve hole of the valve core is slightly raised due to normal abrasion, so that reliability of the proportional throttle valve is improved, and the service life is prolonged; a valve opening can achieve zero covering, no control dead zone exists, and the response speed is raised.

The invention discloses a rotatable electro-hydraulic-driving dental treatment chair. The treatment chair comprises a base, the base is fixedly mounted on the ground, and a hydraulic driving device isarranged on the base; a backrest regulation device is arranged in a rotation platform device, a controller is arranged outside the base, and the power output end of the controller is electrically connected with a miniature hydraulic oil pump, a hydraulic electromagnetic valve and the backrest regulation device. The rotatable electro-hydraulic-driving dental treatment chair has the advantages of simple structure and high practicability.

The invention relates to a manipulator device of a multistage cold former. The manipulator device of a multistage cold former comprises rubber fixing rings, screws and nuts, pull rod guide way fixing seats, four-rod structures consisting of first rods, second rods, third rods and four rods, adjusting nuts, manipulator stands, right manipulator parts, left manipulator parts, miniature hydraulic rods, manipulator stand rear panels, magnet blocks, insulation housings, electromagnetic coils, T-shaped pull rods, reset springs and torsion springs. The opening and closing of the left manipulator parts and the right manipulator parts are controlled through switching on or off of the electromagnetic coils, and the size of a whole mechanism is greatly decreased. Under the mutual effects of the torsion springs among the rods of the four-rod structure and the reset springs arranged in the pull rod guide way fixing seats and the miniature hydraulic rods installed on the four-rod structures, the four-rod structures can accurately return after completing a workpiece clamping step. The opening angles formed by the left manipulator parts and the right manipulator parts are adjusted through the adjusting nuts so as to adapt to workpieces different in size.

The invention relates to a hydraulic locking rotary joint. Two interpenetrating channels are formed in a housing, in one channel, a mandrel is supported by a bearing, a braking piece is installed outside the mandrel, and the mandrel and the housing are relative rotating members of the rotary joint; a miniature hydraulic cylinder is installed in the other channel, and the back part of a cylinder barrel is pressed against a disc spring group. When low-pressure oil is introduced into an oil cylinder, the disc spring group is pressed against the cylinder barrel, so that the braking piece is pressed by the inclined plane of a boss on a cylinder cover on the front end of the cylinder barrel, the mandrel is tightly held, and the rotary joint is in a locking state; when high-pressure oil is introduced into the oil cylinder, a piston rod protrudes to withstand a stop pin, the piston rod stops moving, the cylinder barrel overcomes the thrust of the disc spring group to retract, the inclined plane of the boss on the cylinder cover leaves the braking piece, the mandrel is loosened, and the rotary joint is in a rotatable state. The rotary joint has the advantages of small size, light weight, large locking force, large bearing rotary torque and convenience in control. By adopting the rotary joint, the performance of a rod-shaped serial mechanism, especially an endoscope bracket and the likecan be obviously improved.

The invention relates to a miniature hydraulic garage, comprising two layers on the ground, wherein each layer has two spaces. The garage is simple lift type solid parking equipment with independent structure and control. The garage comprises a support mechanism, front and rear parking boards, a lifting arm mechanism, a dynamic control mechanism and a steel wire synchronous mechanism. The steel wire synchronous mechanism realizes synchronization of two lift cylinders; the parking boards are in horizontal state when on the ground, so that parking is convenient, while the parking plates are lifted, the parking space for the next space is increased. The garage adopts self-locking of a connecting rod type lifting arm instead of a safe hook, when the parking board is lifted to a right position, the included angle between the connecting rod and the lifting arm exceeds 180 degrees to form self locking. The miniature hydraulic garage has the characteristics of more convenient vehicle storage and pickup and simpler operation, has safer and more reliable structure, and can meet the requirement of different users.

The invention discloses a miniature hydraulic turbine watergate control system of the field of water power generation. The system comprises a dam unit and a turbine control unit. The dam unit comprises a level sensor and a flow sensor; the signal output terminals of the level sensor and flow sensor are connected to a signal input terminal of a main dam control CPU, and a signal output terminal of the main dam control CPU is connected to a signal input terminal of a gate control unit; the turbine control unit comprises a main turbine control CPU, a signal input terminal of the main turbine control CPU is connected to a signal output terminal of a monitoring unit, and a signal output terminal of the main turbine control CPU is connected to signal input terminals of an LCD and water control unit. Data communication is performed between the main dam control CPU and the main turbine control CPU. The automation level of a power generating system is raised, the safety risks caused by manual adjustment are eliminated, the safety of operation of generating units is improved, resource is saved, and the system can be applied to water power generation.

The invention discloses a monitoring device for environment control based on a hydraulic power generation technique. The monitoring device comprises a first monitoring cylinder and a second monitoringcylinder, wherein the first monitoring cylinder and the second monitoring cylinder are respectively of a structure of which both ends are not sealed; the second monitoring cylinder is sheathed by thefirst monitoring cylinder; the two ends of the first monitoring cylinder are sealed with the two ends of the second monitoring cylinder; the inside wall of the first monitoring cylinder is fixedly connected with a miniature hydraulic power generator, a storage battery and a resistor, and the storage battery and the resistor are arranged at one side of the miniature hydraulic power generator; a rotary hole is formed in the part, corresponding to the miniature hydraulic power generator, of the side wall of the second monitoring cylinder, the input end of the miniature hydraulic power generatoris connected with a rotary shaft through a coupling, and one end, away from the miniature hydraulic power generator, of the rotary shaft penetrates through the rotary hole, extends up to be connectedwith an impeller. The monitoring device has the advantages that the structure is simple, the operation is convenient, and the service life of a steel wire rope is greatly prolonged; by arranging the miniature hydraulic power generator, the monitoring device can stably work for a long time in the field; the monitoring depth can be changed according to use requirements.

The invention discloses an anti-fog and adjustable cross-road type traffic signal device which comprises a fixing base, a storage battery, fixing barrels, auxiliary props, miniature hydraulic cylinders, miniature fans and humidity sensors. A first hydraulic cylinder is fixed into the upper end of the fixing base, the storage battery is mounted inside the upper end of a main prop, the fixing barrels are welded on the left side and the right side of the upper end of the main prop, the auxiliary props are fixed to the tail ends of second hydraulic rods, the miniature hydraulic cylinders are mounted at the upper ends of signal lamp bodies, miniature hydraulic rods are connected with the lower sides of the miniature hydraulic cylinders, the miniature fans are mounted at the lower ends of the signal lamp bodies, air distribution discs are connected with the upper sides of the miniature fans, the humidity sensors are mounted on the rear sides of the signal lamp bodies, and controllers are mounted below the humidity sensors. The anti-fog and adjustable cross-road type traffic signal device has the advantages that the anti-fog and adjustable cross-road type traffic signal device is additionally provided with anti-fog brushes and the miniature fans, the anti-fog brushes and the miniature fans are used with one another, and accordingly fog on the signal lamp bodies can be wiped off.

The invention discloses an automatically-adjustable medical oxygen inhalation device, which comprises an oxygen bottle body and a mounting base at the bottom of the oxygen bottle body. A heating device is arranged in the mounting base, the upper end of the oxygen bottle body is provided with an oxygen control valve, one side of the oxygen control valve is connected with a humidifier through an oxygen pipeline, and a humidifying device is arranged in the humidifier. A regulating device is arranged in a regulator which is connected with one side of the humidifier through a first oxygen supply pipeline, one side of the mounting seat is provided with a power interface, and a controller is mounted on one side of the oxygen bottle body. A signal output end of the controller is electrically connected with signal input ends of an electric heating wire, a steam generator, a temperature sensor, an ultrasonic atomizer, a humidity sensor and a miniature hydraulic oil cylinder. The automatically-adjustable medical oxygen inhalation device has advantages of simple structure and high practicality.

The invention relates to an indexing and clamping device for a numerically-controlled large spiral bevel gear broaching machine. The device comprises an indexing mechanism driven by a servo motor, and is characterized by further comprising a hydraulic clamping mechanism. The hydraulic clamping mechanism comprises a workpiece clamping part and a main shaft clamping part, wherein the workpiece clamping part comprises a miniature hydraulic piston cylinder fixedly connected with one end of a workpiece main shaft; a piston rod of the miniature hydraulic piston cylinder is extended out of a cylinder body and into the workpiece main shaft; the head part of the piston rod is connected with a tension rod; the main shaft clamping part comprises a hydraulic cylinder sleeved outside the miniature hydraulic piston cylinder; a friction plate fixed with one end of the workpiece main shaft is arranged in the hydraulic cylinder; and a piston piece is arranged between the friction plate and the hydraulic cylinder. The device has the advantages that: a numerically-controlled indexing and auxiliary indexing damping device and an indexing hydraulic clamping device are adopted, so the indexing operation of a lathe is smoother, accurate and reliable, the slight reciprocation of a workpiece in a cutting process is avoided and gear machining accuracy is improved; and a large gear can be machined and the requirements for small quantities and many varieties in the industrial production of automobiles are met.

A miniature hydraulic spreader consists of an oil cylinder, a quick connector, a wedge block and left and right spreading arms, wherein the oil cylinder is connected with a power source through the quick connector, the piston end of the oil cylinder is connected with the wedge block, the left and right spreading arms are connected with the surface of the oil cylinder through a rotary shaft, the oil cylinder is a single-acting oil cylinder and is reset through a built-in reset spring, the left and right spreading arms are of thin duck mouth structures, and a reset spring is arranged between theleft and right spreading arms. The miniature hydraulic spreader adopts the single-acting oil cylinder, does not need a reversing device and is simple in structure, small in size and suitable for rescue work in a narrow space. The spreading arms adopt the thin duck mouth design, and a wedging gap is smaller. The spreading arm reset spring is arranged between the two spreading arms, the spreading arms are automatically reset to a closing state, the resetting speed of a piston is improved, and the working efficiency is improved.

The invention discloses a pair of quadratic miniature-busbar excising forceps, which comprise a movable cutter bit and a fixed cutter bit, wherein a blade of the fixed cutter bit is backward and arranged in an open groove at the front end of a fixed handle; the movable cutter bit which is opposite to the fixed cutter bit is slidably arranged on a groove of the fixed handle; a striker is arranged at a position in the fixed handle at the rear end of the movable cutter bit, which is aligned with the tail end surface of the movable cutter bit; the rear end of the striker is connected to a contact of a miniature hydraulic cylinder; the hydraulic cylinder is fixed in a middle-section cavity of the fixed handle; a decompression button is arranged on the hydraulic cylinder; a power arm is vertically extracted from the hydraulic cylinder to the outside of the fixed handle; the upper end of the power arm is axially connected to the movable handle; the inner end of the movable handle is axially connected to a bracket which is fixed with the fixed handle; and a layer of insulation jacket is respectively fixed on the outer walls of the fixed handle and the movable handle. The hydraulic excising forceps have the advantages of simple structure, convenience for carrying and operation and good safety.

The invention discloses a miniature hydraulic three-wheeled automobile, comprising an automobile body, a steering gear, a lighting instrument operating device, a front wheel arm-swing type vibration absorber (an oil pump), a driving and braking control system, a chassis, a closed hydraulic system power accumulator, a back wheel vibration absorber (an oil pump) and a driving device. The three-wheeled automobile is characterized in that the hydraulic motor of the driving device is directly fixed on two back wheels, is connected with the back wheel vibration absorber (the oil pump) and is installed on the rear axle two ends of which are in a dragging arm type. In the invention, a brushless motor drives a main oil pump to supply oil to a closed hydraulic system to control the hydraulic motor to drive the back wheels at two ends of the automobile to rotate, thus eliminating a gearbox, a transmission shaft, a half shaft and a differential mechanism, simplifying the driving structure and improving transmission efficiency. The invention has the advantages of simple transmission structure, high efficiency, low production and usage cost, safety, comfortableness, practicability, low-carbon energy saving, environment protection, elegant shape, simple and economic operation, reasonable performance configuration and the like, thus being an ideal micro-hydraulic three-wheeled automobile.