120 results about "Elastic cylinder" patented technology

The utility model discloses an anti-falling elastic cylindrical pin, and relates to the technical field of elastic cylindrical pins. The pin comprises an elastic cylindrical pin body, a plurality of barb structures are arranged on the outer wall of the elastic cylindrical pin body, and the barb structures protrude towards the outer side of the elastic cylindrical pin body; the barb structures are obliquely arranged relative to the axial direction of the elastic cylindrical pin body, and the direction of the barb structures is opposite to the insertion direction of the elastic cylindrical pin body during installation. The barb structure is arranged on the outer wall of the elastic cylindrical pin body, the barb structure is obliquely arranged relative to the axial direction of the elastic cylindrical pin body, and the direction of the barb structure is opposite to the insertion direction of the elastic cylindrical pin body when the elastic cylindrical pin body is installed, so that the movement of the elastic cylindrical pin body towards the outer side of the planet carrier can be better limited; therefore, the elastic cylindrical pin body is effectively prevented from falling off, the use reliability of the elastic cylindrical pin body is greatly improved, and the use stability and reliability of the planet carrier and the speed reducer are guaranteed.

The utility model relates to the technical field of chains, in particular to a detachable anti-rotation type conveying chain. According to the technical scheme, the chain comprises a plurality of inner chain links and outer chain links, each inner chain link comprises an inner chain plate, a sleeve and a roller, the inner chain plates are installed at the two ends of the sleeve respectively, and the roller is arranged on the sleeve in a sleeving mode and located between the two inner chain plates; the anti-rotation chain is characterized in that each outer chain link comprises an outer chain plate, a pin shaft and an elastic cylindrical pin, each pin shaft penetrates through the sleeve of one chain link and is fixed between the outer chain plates of the next chain link, and the sleeves and the pin shafts are provided with anti-rotation matching planes matched with the inner chain plates together. The chain has the advantages that the situation that abrasion is prone to occurring in the using process is avoided, the elastic cylindrical pins are arranged between the outer sides of the pin shafts and the outer chain plates, disassembly and assembly can be more convenient during disassembly, the service life during use is longer, and the combination efficiency during disassembly and assembly is higher.

The invention provides a double-layer packer for coal mine hydraulic fracturing and a testing method thereof, and the double-layer packer comprises a central inner pipe which is through in the axial direction and is provided with at least one water through hole which is through in the radial direction of the central inner pipe; the central inner pipe is sleeved with the first elastic cylinder, a first expansion cavity is formed in the outer side of the central inner pipe, and the water through hole is located in the first expansion cavity; and the second elastic cylinder is arranged on the center inner pipe in a sleeving mode, a second expansion cavity is formed in the outer side of the center inner pipe, the first expansion cavity is located in the second expansion cavity, and a metal net is arranged on a cylinder body of the second elastic cylinder. According to the double-layer packer for coal mine hydraulic fracturing and the testing method of the double-layer packer, the success rate of hole sealing and pressure maintaining can be guaranteed, the construction efficiency is improved, and the fracturing engineering material cost is effectively reduced.

The utility model discloses an electronic faucet lock with memorizing and buffering functions. The electronic faucet lock comprises a lock body, a locking shaft, an elastic cylindrical pin, a sealing ring, a glue pouring shell, a lead and an electromagnet. The electromagnet is a bidirectional holding type electromagnet with memory and buffer functions, and the movable iron core of the electromagnet is connected with the locking shaft, so that the telescopic action of the locking shaft is controlled, and locking and unlocking of the faucet lock are realized. According to the technical scheme, the electronic faucet lock with the memorizing and buffering functions is novel in structure and ingenious in design, locking and unlocking actions are completed in an electric control mode, the electronic faucet lock is compact in structural design, the locking shaft is high in strength, long in extension length, reliable in anti-theft performance, intelligent, small in size, small in part number and high in practicability, and the memorizing and buffering functions are achieved. The product is light in weight, simple in structure, convenient to assemble and suitable for low-cost mass production of vehicle types with the keyless entry function.

The invention belongs to the technical field of filter element detection, and particularly relates to a filter element detection device and method for an air filter. Comprising a frame; a filter element; an electric expansion piece is mounted in the center of the inner bottom of the frame; a plurality of elastic cylinders are mounted on the side wall of the output end of the electric expansion piece; the elastic column body is connected with an arc-shaped clamping block; when the filter element is placed in the frame, the output end of the electric expansion piece is located in the filter element center hole, and the moving path of the arc-shaped clamping block covers the hole wall of the filter element center hole. One opposite outer side of the frame is connected with a guide sliding column, and the other opposite outer side of the frame is connected with a driving motor; a displacement lead screw is installed on the inner side of the frame. The output end of the driving motor is rotationally connected with the displacement lead screw. End points of the two displacement lead screws are oppositely arranged. Movable closed half boxes are arranged on the two sides of the filter element; therefore, the stability of the filter element during detection is improved, the detection precision of the filter element is ensured, the detection effect of the device is further improved, and the limitation of the device during use is reduced.

The utility model discloses an egg candler for baby chick hatching, which relates to the technical field of baby chick hatching and comprises a barrel, a mounting cover is mounted at the irradiation end of the bottom end of the barrel in a threaded manner, a first connecting ring is mounted on the outer side of the bottom end of the mounting cover, and an egg candling head is mounted at the bottom end of the mounting cover. An elastic protection assembly is installed on the outer side of the bottom end of the egg candling head and comprises an elastic cylinder, a protection gasket, a second connecting ring and connecting springs, the second connecting ring is installed on the outer side of the top end of the elastic cylinder, and the connecting springs are symmetrically installed at the top end of the second connecting ring; the top end of the connecting spring is connected with the bottom of the first connecting ring, and the elastic cylinder is installed on the outer side of the bottom end of the egg candling head through the connecting spring. The elastic cylinder is installed through the connecting spring and has elasticity when making contact with the egg shell, so that the situation that the egg is damaged due to collision generated when the elastic cylinder makes contact with the egg shell is avoided, and meanwhile the situation that the egg is damaged due to the fact that pressure on the egg is too large when the egg is irradiated and checked is avoided.

The invention discloses a steel pipe machining clamping device, and particularly relates to the technical field of metal machining machinery, the steel pipe machining clamping device comprises a device table, fixed conduction plates symmetrically arranged on the device table and a sliding loading plate connected to the fixed conduction plates in a sliding mode, and a rotatable rotating cylindrical block is installed on the sliding loading plate through a square fixing plate. A plurality of trapezoidal grooves are formed in the rotating cylindrical block in the circumferential direction, clamping square rods capable of moving in the radial direction are connected into the grooves through threaded rods, and a plurality of elastic cylindrical rods are connected to the clamping square rods through springs. The hydraulic cylinders drive the sliding loading plates to move oppositely so that the elastic cylindrical rods can stretch into the two ends of the steel pipe, then the clamping square rods can expand in the radial direction by rotating the threaded rods, the elastic cylindrical rods are tightly attached to the inner wall of the steel pipe under the action of the springs, and multi-point elastic clamping from the inner wall is achieved. The transmission system is driven by the motor to drive the clamped steel pipe to rotate, so that machining operation in the circumferential direction is facilitated. The device is stable in clamping, can effectively prevent the outer wall of the steel pipe from being damaged, and adapts to steel pipes of different specifications.

The utility model belongs to the technical field of supports, and discloses a ground disaster investigation monitoring instrument support which comprises an annular base, a supporting rod, a mounting base, ground nails, mounting holes, a mounting block and a fixing assembly. A mounting cylinder is arranged at the bottom of the mounting block, a plurality of sliding holes are horizontally formed in the mounting cylinder, sliding rods are slidably arranged in the sliding holes, and a first through hole is formed in the mounting block; a first connecting pipe is arranged in the first through hole, the lower end of the first connecting pipe communicates with a cylindrical air bag located in the mounting barrel, and the end, located in the mounting barrel, of the sliding rod makes contact with the outer wall of the cylindrical air bag. The cylindrical air bag is inflated through the first connecting pipe, so that the cylindrical air bag expands to push the sliding rod, and the sliding rod is far away from the outer end and abuts against the inner wall of the hole in the ground. When one sliding rod makes contact with a firm stone and cannot slide outwards, the sliding rod at the position does not slide, due to the fact that the cylindrical air bag is elastic, the cylindrical air bag can still push the other sliding rods to slide and extrude the inner wall of the hole, and the fixing effect is guaranteed.

The invention relates to a fetal head suction midwifery device for the obstetrics and gynecology department and belongs to the technical field of medical instruments. The fetal head suction midwifery device for the obstetrics and gynecology department comprises a supporting cylinder, an adsorption head and an adjusting assembly, a piston is slidably connected to an inner cavity of the supporting cylinder, and the two sides of the piston are connected with an air suction cylinder and an extension cylinder respectively; the adsorption head annularly surrounds the periphery of the supporting cylinder and comprises a fixed cylinder and an elastic cylinder, the fixed cylinder is connected with the supporting cylinder, and the elastic cylinder is arranged on the side, away from the supporting cylinder, of the fixed cylinder; the adjusting assembly is arranged in an inner cavity of the fixing cylinder and comprises a limiting cylinder, an adjusting block and a plurality of connecting ropes, the limiting cylinder is connected with the fixing cylinder, a plurality of clamping grooves distributed in the axial direction of the limiting cylinder are formed in the inner wall of the limiting cylinder, the adjusting block is slidably connected with the inner cavity of the limiting cylinder, a clamping rod is arranged in the adjusting block and used for being clamped with the clamping grooves, and one ends of the connecting ropes are connected with the adjusting block. The other end is connected with the elastic cylinder; and the connecting rope is configured to be tightened under stress so as to reduce the diameter of the elastic cylinder, or released under unloading so as to increase the diameter of the elastic cylinder.

The invention relates to a kind of emulsion extrusion equipment, including milking barrel, the head of the milking barrel is movably inserted with replaceable milking sleeve, the tail of the milking barrel is connected with horn barrel, the lower end of the horn barrel is connected with connecting pipeline, and the connecting pipeline is connected to the collecting barrel.By the structure of annular air bag, air pipe, adjusting cavity, elastic pull rope and elastic cylinder, when vacuum machine stops working or fails, the negative pressure in the elastic cylinder channel reduces, the adjusting cavity is dragged by elastic pull rope and is extruded to make gas enter annular air bag, so that annular air bag is inflated to strengthen the extrusion of elastic extrusion cylinder and isolation cylinder, can continuously clamp nipple and not fall, avoid negative pressure stop extrusion equipment from falling and cause pollution.

The utility model belongs to the technical field of oil and gas exploitation, and discloses a packer which comprises a central pipe, an elastic cylinder, an expansion pipe and a sealing assembly. A first liquid transfer hole is formed in the pipe wall of the central pipe; the center pipe is sleeved with the elastic cylinder, the two ends, in the axial direction, of the elastic cylinder are connected with the center pipe in a sealed mode, a first elastic cavity is defined by the outer circumferential wall of the center pipe and the inner circumferential wall of the elastic cylinder, and liquid in the center pipe can enter the first elastic cavity through the first liquid conveying hole; the elastic cylinder is sleeved with the expansion pipe, the two ends of the expansion pipe in the axial direction are both connected with the elastic cylinder in a sealed mode, a second elastic cavity is defined by the outer circumferential wall of the elastic cylinder and the inner circumferential wall of the expansion pipe, a second liquid conveying hole is formed in the expansion pipe, and external liquid can enter the second elastic cavity through the second liquid conveying hole; the sealing assembly is arranged outside the expansion pipe. The packer has an internal and external pressure balancing function, can still keep reliable setting under high pressure, and reduces the difficulty of staged fracturing operation under high temperature and high pressure.

The utility model provides a high-strength engineering machinery bolt, and belongs to the technical field of bolts. The high-strength engineering machinery bolt comprises a connecting assembly and a protection assembly, limiting grooves are formed in the two sides of a screw rod, firstly, the end of the screw rod can be protected through sliding clamping connection of a telescopic cylinder and an elastic clamping ring, the end of the screw rod is located in the telescopic cylinder, and it is avoided that threads at the end of the screw rod rust due to long-term contact with air; meanwhile, the telescopic cylinder is conveniently disassembled and assembled in a clamping connection mode, the limiting block slides into the limiting groove through the elastic force of the elastic cylinder, the connection stability between the nut and the screw can be enhanced, the nut can be prevented from being separated from the screw, the limiting block can be separated from the limiting groove by pushing the shifting block, and the operation is convenient. And the nut can be rotated, so that the end position of the screw rod can be protected, the nut can be conveniently disassembled, meanwhile, the nut and the screw rod are prevented from loosening, and therefore the practicability is improved.

The utility model discloses a wireless charger, and the charger comprises a pedestal which is provided with a first installation part and a second installation part which are sequentially disposed in a first direction; a first upper cover; the lower end of the elastic cylinder is connected to the first mounting part, the upper end of the elastic cylinder is connected to the first upper cover, and the elastic cylinder, the first upper cover and the first mounting part define a first accommodating cavity for accommodating a charging module and a lifting mechanism; the charging module is connected with the first upper cover and the driving end of the lifting mechanism; the second upper cover is provided with ventilation holes and connected to the second mounting part, and the second upper cover and the second mounting part define a second containing cavity for containing a control module and a heat dissipation module; and the base is provided with a communicating channel for communicating the first accommodating cavity with the second accommodating cavity.

The utility model relates to the technical field of swings, in particular to a swing with a lifting rope convenient to replace, which comprises a seat plate and a lifting rope, through holes are formed in the front and rear sides of the left and right ends of the seat plate, and one end of the lifting rope sequentially penetrates through the two through holes in one side of the seat plate and is connected through a fixing component; the fixing part comprises a fixing block, round holes are formed in the upper end and the lower end of the front side and the rear side of the fixing block, a strip-shaped hole is formed in the outer end of the fixing block and communicates with the round holes, a push plate is slidably connected into the strip-shaped hole, a plurality of first teeth are evenly and fixedly installed on the side wall of the inner end of the push plate, and a movable plate is detachably installed at the outer end of the push plate; the lifting rope replacing device has the beneficial effects that when a lifting rope needs to be replaced, a bolt is screwed off from a threaded hole, a movable plate and a push plate can be pulled outwards, first teeth are separated from the lifting rope, then a top plate is pinched and pulled upwards, an elastic cylinder is separated from a round hole, the elastic cylinder is recovered, the elastic cylinder is separated from the lifting rope, and the lifting rope can be pulled out from the round hole, so that the lifting rope is convenient to replace.

The utility model relates to the technical field of filler compactness detection, and particularly discloses a roadbed filler compactness detection device which comprises a bearing plate, a connecting rod connected above the bearing plate, a connecting cylinder arranged at the bottom of the connecting rod, an elastic cylinder arranged at the top of the connecting cylinder, a drop hammer connected to the middle of the connecting rod, and a limiting rod connected to the top of the connecting rod. And an embedding groove is formed in the connecting cylinder, a deflection rod is connected in the embedding groove, one side of the deflection rod is connected with an abutting assembly, and the abutting assembly swings along the shaft. Through the deflection rod and the abutting assembly arranged in the device, when the connecting cylinder is connected with the bearing plate, deflection can be conducted through contact pressure application, so that the connecting cylinder can adapt to bearing plate connecting columns with different diameters, the universality of the connecting cylinder is better, the connecting stability is better, and the situation that shaking influences impact is generated is avoided.

This invention discloses an easy-to-operate new energy charging pile, belonging to the field of new energy charging piles. It includes a charging pile and a charging gun. A fixed cylinder is fixedly installed on the charging pile, and a fixed component is provided on the charging gun. An adjustment component is provided inside the charging gun. The fixed component includes a handle fixedly installed on the charging gun, an elastic cylinder fixedly installed on the charging gun, and a fixed plate fixedly installed on the elastic cylinder. A connecting component is installed between the fixed plate and the charging gun. A plug is slidably installed through the fixed plate, and a cylinder is fixedly installed on the plug. This design allows the operator to adaptively adjust the tilt angle of the plug according to needs. Simultaneously, the pushing component effectively ensures that the plug on the charging gun remains parallel to the charging port during insertion or removal, improving contact and effectively reducing mechanical wear.

The utility model relates to the technical field of three-position switches, in particular to a fixing tool for assembling a moving contact. The fixing tool for moving contact assembly comprises a base, a containing groove is formed in the base and used for containing a moving contact body, and the two side groove walls, extending in the length direction of the base, of the containing groove are used for supporting the moving contact body so as to prevent the moving contact body from rolling. A positioning surface which is matched with a corresponding end surface of the moving contact main body to axially position the moving contact main body is arranged at one end of the accommodating groove on the base, the other end of the accommodating groove penetrates through a corresponding end of the base, and avoiding grooves are formed in positions, close to two ends of the accommodating groove, on the base in a transition manner and are used for avoiding watchband contact fingers at two ends of the moving contact main body. As the moving contact main body is kept stable, the mounting tool is ensured not to scratch a watchband contact finger due to rolling of the moving contact main body, meanwhile, the mounting precision of the elastic cylindrical pin can be ensured, a sharp edge left due to improper mounting is avoided, and the operation smoothness of the three-position switch is further improved.

A high-speed jaw type one-way clutch comprises an outer sleeve, an L-shaped lining, a clutch disc, a fastening handle, a lower shaft sleeve, a jaw disc and an elastic cylindrical pin, the lower shaft sleeve is sleeved with a screw hole of the outer sleeve through external threads, a step hole in the upper end of the lower shaft sleeve is sleeved with the lower end of the jaw disc, the elastic cylindrical pin is connected, and clutch teeth of the jaw disc are attached to a clutch disc roller carrier. The upper end of the clutch disc is sleeved with an inner hole of the L-shaped bush, the upper side of the large end of the clutch disc is attached to the lower side of the large end of the L-shaped bush, the small end of the L-shaped bush is sleeved with an inner hole in the upper side of the outer sleeve, and the upper side of the large end of the L-shaped bush is attached to a step in the upper side of the outer sleeve. And the fastening handle is sleeved in the lower shaft sleeve screw hole A and the outer sleeve screw hole B. The idler wheel and the clutch teeth form a rolling pair, friction force is small, needed axial component force is small, abrasion is greatly reduced, rigid collision between the idler wheel and the tooth embedding disc is avoided through nylon materials, impact loads can be effectively absorbed through the compression spring and the elastic cylindrical pin, clutch frequency and separation reliability can be both considered, and the running speed is effectively increased. The utility model also has the functions of a safety clutch and an elastic coupling.

This application relates to a flexible circuit board for convenient single-sided installation, comprising a flexible circuit board, a circuit board, and a docking assembly. The docking assembly is disposed between the flexible circuit board and the circuit board. The sidewall of the flexible circuit board has multiple first pins, and the sidewall of the circuit board has multiple second pins that match the first pins. The docking assembly includes a docking member with a fixing hole. A lower pressure plate and an arc-shaped pressure block are disposed within the fixing hole. Three elastic cylinders are fixedly connected to the upper end of the docking member, and a return spring is fixedly installed within each of the three elastic cylinders. This invention, by setting the docking assembly between the flexible circuit board and the circuit board, allows the docking assembly to be removed from between the flexible circuit board and the circuit board when maintenance or replacement is required, effectively avoiding accidental damage to the circuit board during maintenance and thus preventing increased usage costs.

The utility model discloses a kind of biological base environmentally-friendly lubricating oil production efficient mixing devices, it is related to mixing device technical field, including mixing tank, top cover and stirring shaft, the top end of the top cover is rotatably installed with rotating ring, the inside of the top cover is rotatably installed with synchronous ring, the inside of the synchronous ring is rotatably installed with two feed pipes, the outside of the feed pipe is fixedly installed with two sealing sleeves, the two side ends of the feed pipe are connected with synchronous ring by pivot, the top end of each feed pipe is fixedly installed with elastic cylinder, when guide rail plate slides, drive electric telescopic rod reverse telescoping, drive plug rod to leave the socket of support frame inside, so that guide rail plate can slide freely, when guide rail plate slides to suitable position, forward telescoping electric telescopic rod, electric telescopic rod generates thrust to plug rod, so that plug rod slides and inserts the socket of support frame inside, to fix the position of guide rail plate, guarantee the stability of feed pipe spatter angle.

The utility model relates to the technical field of numerical control machining, in particular to a machining clamp for a long inner hole shaft, which comprises a pull rod and a main shaft flange, a clamp base shaft is arranged at one end of the main shaft flange, a mounting base is arranged at one end of the clamp base shaft, and a positioning head mounting part is arranged at the other end of the clamp base shaft. An expansion sleeve supporting part and a long kidney-shaped round hole are formed in the middle of the clamp base shaft, a guide positioning head is arranged on the positioning head mounting part, an elastic expansion sleeve is arranged outside the expansion sleeve supporting part in a sleeving mode, a first pin shaft hole is formed in one end of the elastic expansion sleeve, a second pin shaft hole penetrating in the radial direction is formed in one end of the pull rod, and a second pin shaft hole penetrating in the radial direction is formed in the other end of the pull rod. An elastic cylindrical pin is arranged in the first pin shaft hole, the second pin shaft hole and the long kidney-shaped round hole in a penetrating mode. According to the utility model, the turning tool can conveniently finish the turning operation of the outer surface of the long inner hole shaft at one time, the machining precision and efficiency are improved, the potential safety hazard is avoided, and the use is convenient and reliable.

The utility model discloses a tramcar switch rail anti-jumping structure, which relates to the technical field of turnouts and comprises a switch rail, a switch rail seat and a limit plate, a switch rail groove is arranged on the upper side of the switch rail seat, the switch rail is slidably arranged in the switch rail groove, a U-shaped limit groove is arranged on the lower portion of the point end of the switch rail, the limit plate is slidably connected in the limit groove, and the limit plate is arranged in the limit groove. The side face of the limiting plate is integrally connected with a fixing block, and the fixing block is installed on the switch rail base through a pair of fixing bolts and a pair of elastic cylindrical pins. The limiting groove with the R fillet is directly formed in the lower portion of the point end of the switch rail, the limiting plate is arranged in the inwards-concave groove, in this way, the space of the switch rail groove at the position can be utilized to the maximum extent, and the fixing block and the limiting plate can be reliably installed and fixed through the pair of fixing bolts and the pair of elastic cylindrical pins; and the point end of the switch rail can be effectively limited to run out of a theoretical working area in the vertical direction through the limiting plate, potential safety hazards are reduced, and protection of the switch rail is facilitated.

The invention belongs to the technical field of crushing devices, and discloses a corn grit grading crushing device which comprises a machine frame fixedly provided with a shell and a driving unit, a feeding hopper and a discharging hopper are fixed to the shell, a rolling unit, a crushing unit and a screening unit are sequentially arranged in the shell from top to bottom, a screening plate is arranged in the screening unit, and a crushing unit is arranged in the screening plate. A plurality of through holes are formed in the sieve plate, elastic cylinders are fixed in the through holes, sieve holes are formed in the centers of the elastic cylinders, annular cavities are formed in the cylinder walls of the elastic cylinders, and an upper adjusting mechanism and a lower adjusting mechanism which are the same in structure are fixed in the annular cavities; the upper adjusting mechanism comprises a plurality of magnetic repulsion pieces arranged in the circumferential direction of the annular cavity, each magnetic repulsion piece comprises an electromagnet and a magnetic block which are matched in a magnetic repulsion mode, an outer groove and an inner groove which are opposite are formed in the inner wall of the annular cavity, the electromagnets are fixedly embedded in the outer grooves, and the magnetic blocks are fixedly embedded in the inner grooves; according to the invention, the aperture size of the sieve pores can be adjusted according to actual needs.

The invention provides a mechanical interlock of a self-locking valve opening mechanism of a switch cabinet, which relates to the technical field of medium-voltage alternating-current metal-enclosed switch equipment and control equipment and comprises a valve plate, a fixed plate welding part, an upper interlocking plate welding part, a lower interlocking plate welding part, a spring I, a spring II, a self-locking plate and an unlocking plate, the unlocking plate tilts outwards under the supporting force of the unlocking torsional spring, the elastic cylindrical stop pin and the lock plate slide in the upper interlocking plate welding and lower interlocking plate welding directions under the effect of the supporting force of the unlocking torsional spring, and at the moment, under the tensile force of the first spring and the second spring and the supporting force of the lower limiting position of the valve, the elastic cylindrical stop pin slides in the upper interlocking plate welding and lower interlocking plate welding directions. The sharp corners beside the shaft sleeves of the upper interlocking plate welding part and the lower interlocking plate welding part just form small clamping grooves, the self-locking plate is just clamped in the small clamping grooves, interlocking is in a locked state in the state, namely, the circuit breaker is not pushed into a cabinet or does not enter a working state, at the moment, a valve cannot be forcibly pushed open manually to make contact with a static contact, the self-locking function of the structure is safe and reliable, and manual misoperation is prevented.

The invention discloses a combined type heavy crane steel rail formed by recycling waste steel rails. The combined type heavy crane steel rail comprises a crane rail base, a first steel rail tread high-alloy working layer and a second steel rail tread high-alloy working layer. The first steel rail tread high-alloy working layers are installed at the two ends of the crane rail base through the elastic connecting pieces and the elastic cylindrical pins, and the second steel rail tread high-alloy working layer is arranged between the first steel rail tread high-alloy working layers and installed on the crane rail base. Compared with the prior art, the outer sides of the two ends of the steel rail base are flexibly connected with the tread working layer, so that adjustment of an expansion joint between the tread working layer and the crane rail base is achieved, and replacement and disassembly of the tread working layer are facilitated; and the working layers of the steel rail tread are connected by adopting 60-degree inclined planes, and a certain expansion joint is reserved on the outer side, so that mounting and dismounting are convenient, and rigid impact is relieved.

The invention discloses an FBG (Fiber Bragg Grating) cable force meter externally arranged on an inhaul cable rib material and an installation method thereof, and relates to a cable force monitoring device of a prestressed cable body and an installation method thereof, the cable force meter comprises an FBG and an elastic cylinder, and the elastic cylinder is fixedly connected to the inhaul cable rib material; n through axial mounting grooves are uniformly formed in the elastic cylinder along the circumference, and n is greater than or equal to 1; the fiber bragg grating is installed in the axial installation groove, the elastic cylinder is a rigid cylinder body, a structure for reducing the axial deformation rigidity is arranged in the middle of the cylinder body, and the structure is a spiral groove or an annular groove formed in the outer wall of the circumference of the middle of the rigid cylinder body. The method comprises the following steps: firstly, fixing the fiber bragg grating in the axial mounting groove of the elastic cylinder, then sleeving the elastic cylinder on a to-be-tested rib material, and fastening and connecting the elastic cylinder and the to-be-tested rib material; the force value calibration coefficient is obtained, and the stress monitoring of the whole cable bundle is realized. The device is suitable for installation with limited space, and has the characteristics of low cost, low installation difficulty, guarantee of structural safety, improvement of cable force monitoring precision and the like.

This invention belongs to the technical field of mulching equipment, specifically relating to a tree trunk mulching device for nighttime sap flow detection. It includes a main rod, a first support rod, and a membrane rod. Two second support rods are fixedly connected to the main rod. A membrane pressing assembly is provided on the outward-facing side of each second support rod. The membrane pressing assembly includes a rotating wheel, which is rotatably connected to the second support rods via a shaft. The rotating wheel has a wheel housing, which includes a shell and a rotating body. The shell is mounted on the rotating wheel, and the rotating body is rotatably connected to the side wall of the shell facing the second support rods. The rotating body has a keyed through hole for the shaft to pass through. An elastic cylinder is provided between the shell and the rotating wheel. An elastic strip is provided on the outer wall of the elastic cylinder, and a groove is provided on the circumferential wall of the shell for the elastic strip to pass through. This invention addresses the problem of poor sealing and waterproofing due to the difficulty of the membrane adhering tightly to the tree trunk in recessed areas.

The utility model discloses a rockshaft end face eccentric hole automatic aligning and pressing device which comprises a floor, an automatic aligning device body, a machined part and an unmachined part, three sets of clamps are arranged at the top of the floor, an L-shaped end face positioning block is arranged on one side of the top of the floor, and the middle of the top of each clamp is in threaded connection with a hexagon socket screw A; according to the utility model, the L-shaped end face positioning block, the clamp, the pressing plate, the inside hexagonal bolt A, the cylindrical bolt, the mandrel fixing stop block, the thrust spring, the automatic alignment device body, the diamond taper pin and the pressing plate spring are matched with one another, so that the device adopts the principle that two points determine a straight line and four pins automatically align a parallel horizontal plane; the automatic alignment accessory body and the automatic alignment device body adopt an elastic cylindrical taper pin and diamond taper pin structure and a left U-shaped groove and right U-shaped groove design, and the automatic alignment accessory can automatically align and position an oil hole and automatically eliminate shape and position errors of a shaft hole and assembly errors of a clamp.

The disclosure provides a massager, an accommodating hole is provided on a housing, a sleeve body is axially provided in a cavity of the accommodating hole, and the sleeve body is in running fit with a cavity wall of the accommodating hole; an elastic cylinder body is fixed in a cavity of the sleeve body, and a plurality of elastic protrusions are distributed on a cavity wall of the cylinder body; and a side portion of the accommodating hole forms a first housing cavity, a first driving motor is provided in the first housing cavity, and the first driving motor is in transmission fit with the sleeve body via a transmission mechanism. The first driving motor drives the elastic cylinder body to perform rotary motion to facilitate massage, so as to promote blood circulation of corresponding massaged region and improve comfort.

The invention provides a wind energy conversion device capable of adjusting resonant frequency, which belongs to the technical field of wind energy power generation and comprises a wind energy conversion system, a resonant frequency adjusting system and an electric energy output conversion system. The wind energy conversion system is used for capturing wind energy in a wind field and converting the wind energy into mechanical energy; the resonance frequency adjusting system is installed between the wind energy conversion system and the electric energy output system, used for adjusting the inherent frequency of the whole device and comprises threaded steel, the upper end and the lower end of the threaded steel are connected with a first light elastic cylinder and a second light elastic cylinder correspondingly, and two mass blocks are installed on the threaded steel. The mass block moves up and down on the deformed steel bar to adjust the mass center of the device; the electric energy output conversion system is connected with the lower portion of the resonance frequency adjusting system and used for converting the mechanical energy captured by the wind energy conversion system into electric energy. The output power and the power generation efficiency of the electric energy conversion output system are improved, the system can operate at a low wind speed, and the application range is wider.