3309 results about "Locknut" patented technology

An improved AR platform firearm includes modular brass deflectors and brass catches; sleeved takedown and pivot pinholes; a cam latch device for a secure upper / lower receiver connection; a two-piece upper receiver; a taper-fit barrel system; a barrel alignment system using a barrel alignment washer; a charging handle that positively engages with the bolt carrier; a charging handle retention system using a spring detent; a bolt carrier with rear wall to absorb shear force on the gas key or anvil; a leak-proof gas system using a straight gas tube, ferrule and threaded connection with the gas block; a gas block stop notch that mates with a gas block key; a gas block jam nut for holding the gas block in place; an interchangeable gas system; an expansion chamber; a handguard with adjustable weights; a handguard lock-up mechanism; a handguard extender; and a sloped Picatinny rail for extending scope utilization.

The lead screw pre-stretching mechanism for the numerical control machine tool comprises a lead screw, a tail end bearing seat is arranged at the end of the lead screw, the tail end bearing seat comprises a tail end bearing sleeve, a plurality of first bearings, a first gasket, a load cell, a load cell gasket, a disc spring and a first outer spacer ring, and the first bearings, the first gasket, the load cell, the load cell gasket, the disc spring and the first outer spacer ring are located in the tail end bearing sleeve. The disc spring, the load cell gasket and the load cell are sequentially arranged on the first outer distance ring in a sleeved mode, the end of the tail end bearing sleeve is bent to form a contact step, the two ends of the disc spring abut against the contact step and the load cell gasket respectively, the end of the lead screw sequentially penetrates through the first outer distance ring, the first gasket and all the first bearings, and the load cell is tightly attached to the first gasket. The first gasket is tightly attached to the first bearing, and the end of the lead screw is exposed out of the tail end bearing seat and provided with a locking nut. The disc spring can well balance the pre-stretching force of the lead screw and the pre-tightening force of the tail end bearing seat, automatic compensation of thermal elongation of the lead screw can also be achieved, and high precision and high stability are provided for a transmission system of a machine tool.

The invention relates to the technical field of pipeline movable joint manufacturing, and discloses a movable joint which comprises a first joint, a second joint, a third joint and a fourth joint. A spherical surface is arranged at the end of the second joint, and the spherical surface is used for being matched with the conical sealing surface to form sealing; the locking nut is used for connecting the first connector and the second connector, an internal thread is formed in the inner side wall of the locking nut, and the internal thread is matched with the external thread; the sealing ring is mounted between the first joint and the second joint; through the structural design of the first joint and the second joint, a formed sealing structure is provided with at least two sealing structures after being matched with a sealing ring, the sealing performance of the movable joint can be effectively improved, and even if the first two layers of sealing structures fail, the connection mode of the locking nut can also prevent the movable joint from generating overlarge leakage rate, so that the sealing performance of the movable joint is improved. The movable joint is particularly suitable for high-temperature medium pipelines, and the safety performance of the movable joint is effectively improved.

The invention relates to a drive bolt lock (2) for locking and unlocking a fixed leaf (14) of a double-leaf door (11), having a lock housing (21) in which a retractable slide (241) for a drive bolt rod (24) and a bolt slide (5) are accommodated, and a slide plate (27) is mounted so as to be linearly displaceable and a lock nut (23) with a nut lever (231) is mounted so as to be rotatable in order to manually unlock the drive bolt lock (2). In order to enable a broad applicability of the espagnolette lock (2), it is provided that the lock housing (21) has at least two installation spaces (81, 82, 83, 84, 85), wherein a motor module for motor-driven unlocking of the espagnolette lock can be installed or retrofitted in a first installation space (81), and a latch slide module (4) can be installed or retrofitted in a second installation space (82).

Described are aspects of sensor mount fixing techniques and apparatuses that are configured to receive, secure, and / or support one or more sensors relative to a support structure of a workpiece. In aspects, a sensor mount fixing includes a body portion configured to mount on a support structure. The body portion includes a sensor mount portion configured to receive a sensor housing through the body portion. A sensor mount fixing may include a locknut retainer configured to retain a first locknut engaged with the sensor housing against rotation during a turning (e.g., a tightening, a loosening) of a second locknut engaged with the sensor housing. A sensor mount fixing may include a clamp portion configured to clamp onto the sensor housing to retain the sensor housing.

The utility model relates to the technical field of blowing of high-pressure storage tanks, in particular to a blow molding high-pressure inner container with a preset metal pipe opening. The high-pressure inner container comprises a blow molding inner container and a metal pipe opening installed at an opening of the blow molding inner container. The metal pipe opening comprises a fixing piece coaxially installed on the inner side of the neck portion, an outer clamping hoop installed on the outer side of the neck portion in a sleeving mode and a locking nut connected to the fixing piece through threads. The inner end of the fixing piece is provided with a disc body clamped at the opening of the blow molding inner container, and the outer end of the fixing piece extends out of the blow molding inner container and is provided with an external thread used for installing the locking nut; the lower end of the outer clamping hoop and the disc body jointly form a clamping mechanism for the blow molding inner container, and the upper end of the outer clamping hoop abuts against the lower face of the locking nut. According to the high-pressure inner container, a large fixing piece can be pre-arranged in the blow molding inner container, a metal pipe opening is firmly connected, the sealing performance is good, and the compressive strength is high; and special requirements on the strength of the shoulder part and the neck part of the blow-molded inner container are avoided, so that the material consumption of the plastic inner container is reduced, and the overall weight is reduced.

The invention discloses a double-acting integrated hydraulic nut and a hydraulic nut system. The double-acting integrated hydraulic nut comprises a cylinder body, a piston, a cylinder cover, a locking nut, an outer hexagon head bolt and a locking sleeve. A mounting plane attached to a workpiece is arranged at the bottom of the cylinder body, and the piston is arranged in an inner cavity of the cylinder body in an axial sliding mode. The outer hexagonal head bolt sequentially penetrates through the axial through hole of the piston and the bottom of the cylinder body, and the threaded end of the outer hexagonal head bolt is meshed with a workpiece in a threaded mode. The cylinder cover is arranged at the top of the cylinder body; the locking nut is in threaded connection with the piston rod and is in contact with the top surface of the cylinder cover; a pressurizing oil port connected with a hydraulic pump station is formed in the side wall of the cylinder body. The hexagonal head of the outer hexagonal head bolt is sleeved with the locking sleeve which is in driving connection with the electric wrench. Due to the fact that the bearing seat bolts are compact in layout and large in bolt pre-tightening force requirement, the experiment platform can be rapidly mounted and dismounted, and working time and cost are greatly reduced.

A locking-mode-selectable lock bolt and nut device comprises a bolt and a nut, the main fastening nut is arranged on the bolt in a sleeving manner; the fixed locknut is arranged on the bolt in a sleeving manner and is positioned above the main fastening nut; wherein a bolt locking groove is formed in the outer wall of one side of the bolt in the length direction, the section of the bolt locking groove is triangular, an acute angle is formed by two side faces in the bolt locking groove, one side face is arranged in the radial direction of the bolt, and the other side face is an inclined face; mounting through holes are symmetrically formed in two opposite surfaces of the fixed locknut, and a screw hole, a round hole and a square hole are sequentially formed in each mounting through hole from outside to inside; the inner diameter of the round hole is larger than that of the screw hole, and the width of the square hole is smaller than that of the round hole. And the two locking assemblies are respectively inserted into the two mounting through holes of the fixed locknut.

The anti-falling overspeed protection device comprises the cargo carrying table and a guide seat, safety tongs are arranged on the cargo carrying table, the safety tongs are connected with a safety tongs connecting plate, and the safety tongs connecting plate is fixedly connected with a connecting rod and an overspeed connecting rod; the overspeed connecting rod is fixedly connected with the middle of the safety gear connecting plate, one end of the overspeed connecting rod is hinged to the cargo carrying table mounting plate, and the other end of the overspeed connecting rod is fixed to the overspeed protection steel wire rope. The upper end of the compression rod penetrates through the supporting spring and is fixed at the lower end of the guide seat through a locking nut; a guide rod is further fixed to the lower end of the guide seat through a nut, the guide rod penetrates through the spring support and the compression spring, a pulley shaft penetrates through the upper end of the guide seat, and the pulley shaft further penetrates through the pulley and the pulley bearing and is fixed to the pulley mounting plate through an end cover. The safety protection device is used for safety protection when rope breaking, rope loosening or stalling and overspeed happen to the cargo carrying table of the stacking machine.

The invention relates to the technical field of hydraulic valves, and discloses a buffer overflow valve which comprises a shell, a first sealing ring is arranged on the surface of the shell, a connecting block is fixedly connected to the right end of the shell, an adjusting assembly is arranged in the connecting block, and a storage assembly is fixedly connected to the side, close to the shell, of the adjusting assembly. A moving assembly is arranged in the storage assembly, a spring is arranged between the storage assembly and the moving assembly, the adjusting assembly comprises a threaded rod, the surface of the threaded rod is in threaded connection with a connecting block, and the surface of the threaded rod is in threaded connection with a locking nut. A closed cavity is formed between a connecting column and a fixing seat, a second sealing ring is used for sealing, a valve element and an oil way in the connecting column are communicated with the closed cavity, the cavity is filled with oil, and when the oil on the left side of the valve element rises, due to the existence of the oil in the closed cavity, the valve element cannot instantly leave a valve seat at the bottom of a valve block; therefore, the buffer overflow valve can be opened at low pressure, and pressure impact cannot be generated.

The utility model discloses a drawing instrument capable of monitoring the displacement amount of an anchor rod in real time, which comprises a counter-force gasket, a sleeve, a tension oil cylinder, a steel wire type spring displacement meter and a connecting rod, the counter-force gasket, the sleeve and the tension oil cylinder are sequentially arranged in a contact mode, one end of the connecting rod penetrates through the tension oil cylinder and the sleeve and then is in threaded connection with the exposed end of the anchor rod, and the other end of the connecting rod is in threaded connection with the steel wire type spring displacement meter. The other end penetrates through the tension oil cylinder and then is in threaded connection with a locking nut; the steel wire type spring displacement meter is arranged on the counter-force gasket and the tension oil cylinder and is fixed through elastic force of the steel wire type spring displacement meter. The drawing instrument provided by the utility model can measure and record the displacement of the anchor rod in real time in the drawing process of the anchor rod, simultaneously generates an anchor rod displacement-time whole-process curve, observes the displacement change trend of the anchor rod, and can export data in the later period, so that engineers can comprehensively evaluate the performance of the anchor rod.

The utility model provides a lead screw supporting structure which comprises a ball screw and a tail end seat, the tail end seat is provided with a through installation hole, one end of the ball screw is installed in the installation hole through a bearing, a limiting ring is arranged on the ball screw on the axial outer side of the bearing in a sleeved mode, and the limiting ring is arranged on the tail end seat. A locking nut is mounted on the lead screw on the axial outer side of the limiting ring; the ball screw on the axial inner side of the bearing is sleeved with a spacer ring, and a compressed elastic piece is arranged between the axial inner side of the spacer ring and the tail end base. The installation mode of the tail end of the ball screw is changed into a supporting mode from a fixing mode, continuous axial supporting force is provided for the tail end of the ball screw through the action of the elastic piece and the distance ring, axial movement of the ball screw is restrained, and the displacement precision of the ball screw is improved.

The invention provides an unstressed supporting and unloading device for ground adjustment of a reflecting surface. The unstressed supporting and unloading device comprises movable trundles, a bottom frame, an adapter plate and an adjustable supporting assembly. The plurality of adapter plates are mounted on the underframe; the adjustable supporting assembly is fixedly connected with the adapter plate, and the top end of the adjustable supporting assembly is used for being connected with an external reflecting surface. The adjustable supporting assembly comprises a rigid supporting bracket, a spherical hinge joint, an upper sleeve, a lower sleeve, a fixed support and a height adjusting structure. The height adjusting structure comprises an upper fixing nut, an upper locking nut, an adjustable supporting screw rod, a lower locking nut, a lower fixing nut, a height adjusting handle and a locking handle; a height adjusting handle is mounted on the adjustable supporting screw rod; locking handles are mounted on the upper locking nut and the lower locking nut; one set of device can penetrate through the reflecting surface assembling technological process, parking, loading, transporting and adjusting of the reflecting surface are met, one-stop assembling is achieved, and the assembling efficiency is improved.

The utility model discloses an anti-loosening double-nut pressing type quick coupler, and relates to the technical field of sealing couplings. Comprising a connector body, and a continuous fifth threaded section is arranged on the outer wall of the connector body; the locknut set comprises a fastening nut and a locking nut, a fixed section is formed at one end of the fastening nut, a continuous first threaded section matched with the fifth threaded section is arranged on the inner wall of the fastening nut and the inner wall of the fixed section, a second threaded section is arranged on the outer diameter of the fixed section, a locking section is formed at one end of the locking nut, and the locking section is matched with the second threaded section. A third threaded section matched with the second threaded section is arranged on the inner wall of the locking section, and a fourth threaded section matched with the fifth threaded section is arranged on the inner wall of the locking nut; the fastening nut and the locking nut are in threaded connection through the second threaded section and the third threaded section, and the locking nut is in threaded connection with the fifth threaded section on the connector body through the fourth threaded section. The fastening nut and the locking nut are fixed in a detachable connection mode.

The invention discloses a novel permanent magnetic mechanism suitable for a permanent magnetic circuit breaker and a ring main unit, which is characterized in that a static iron core and a movable iron core are oppositely arranged in an aluminum alloy shell along the axial direction, an internal pull rod penetrates through the axis of the aluminum alloy shell, and the internal pull rod movably penetrates through the static iron core and is connected with the movable iron core; a shaft fixing ring is movably arranged on an inner pull rod of the aluminum alloy shell, the shaft fixing ring movably abuts against the side, away from the static iron core, of the movable iron core, and the two sides of the shaft fixing ring are axially limited through a locking nut and a total stroke adjusting nut which are connected to the inner pull rod in a threaded mode. The mechanism is provided with a total stroke adjusting mechanism, an overtravel adjusting mechanism and a switching-on and switching-off speed adjusting mechanism, respective adjustment is achieved through special nuts, the problem of synchronous change of the opening distance and the overtravel of a traditional mechanism is solved, an aluminum alloy shell and a closed magnetic circuit are adopted, magnetic leakage is reduced, the magnetic field utilization rate and the impact resistance are improved, and spring pre-tightening force is changed through spring adjusting nuts; the switch-on and switch-off speed is accurately controlled, various loads are adapted, and the breaking risk is reduced.

The utility model relates to a two-direction rotating mechanism of a treatment bed. The device comprises a bottom plate, a sliding assembly, a transmission assembly, a rotating assembly and an upper plate, the sliding assembly and the rotating assembly are arranged between the bottom plate and the upper plate, the sliding assembly is connected with the transmission assembly, and the sliding assembly comprises an inclined plane connecting piece, a first guide rail, a second guide rail, a special-shaped connecting piece, a self-aligning ball bearing, a first bearing seat, a bearing end cover, a locking nut and a third guide rail; the first guide rail is arranged on the bottom plate, the inclined plane connecting piece is arranged on the first guide rail, the second guide rail is arranged on the inclined plane of the inclined plane connecting piece, the special-shaped connecting piece is arranged on the second guide rail, the first bearing seat is arranged on the special-shaped connecting piece, a self-aligning ball bearing is arranged in the first bearing seat, and a bearing end cover is arranged above the first bearing seat. A third guide rail is arranged above the bearing end cover, and the upper plate is arranged on the third guide rail. Rotation of the treatment bed in two directions is achieved through one structure, a better treatment effect is achieved, the size is small, and the structure is simple.

The utility model discloses assembling equipment, and relates to the technical field of vehicle production, the assembling equipment comprises a production line, an assembling device, a feeding device, a tightening device and a tightening machine, the production line is sequentially provided with a feeding station, a feeding station and a tightening station along the conveying direction of the production line, the assembling device comprises a bearing mechanism, a tightening mechanism and a first transfer robot; the first transfer robot can transfer the shock absorber from the bearing mechanism to the tightening mechanism, and can also transfer the tightened shock absorber to a brake disc at the feeding station; the feeding device is used for conveying locking nuts to a screw rod, penetrating through a shock absorber, on the brake disc; the tightening device is used for tightening the locking nut and the locking nut for fixing the swing arm; the tightening machine is used for tightening fixing bolts of the fixing support and fixing nuts matched with the fixing bolts. According to the technical scheme, the assembling device, the feeding device, the tightening device and the tightening machine are arranged, so that manual assembly of the brake assembly can be replaced, and the working efficiency is improved.

The invention discloses a hoisting module, a hoisting system and a construction method for crossing-intersection cast-in-place beam construction, the hoisting module comprises a reverse hoisting steel frame, a bottom platform, a plurality of reverse jacking devices and a plurality of hoisting rods, and the reverse hoisting steel frame is supported by two segmental beams; a plurality of first lifting holes are distributed in the reverse lifting steel frame; second lifting holes are formed in the positions, corresponding to the first lifting holes, of the bottom platform. The upper end of each hanging rod penetrates through one first hanging hole, the lower end of each hanging rod penetrates through one second hanging hole, and the upper end and the lower end of each hanging rod are in threaded connection with locking nuts respectively. A reverse jacking device is arranged between each segmental beam and the bottom platform; each reverse jacking device comprises a lower jacking block, an adjusting nut, a lifting screw and an upper jacking plate, and the upper jacking plates and the lower jacking blocks apply pressure to the segmental beams and the bottom platform correspondingly. Through a double stress balance structure of reverse hoisting of the reverse hoisting steel frame and reverse jacking of the reverse jacking device, the construction safety is greatly improved.

The utility model relates to a formwork fixing structure which solves the technical problems that an existing formwork fixing mode is not firm in fixing, prone to deformation and the like. The utility model provides a concrete wall pouring formwork fixing structure which comprises an opposite-pull screw rod, and the two ends of the opposite-pull screw rod are each provided with a formwork blocking piece, a steel bar pressing piece and a locking nut which are sequentially distributed from inside to outside. The formwork separation blade and the steel bar pressing piece which are located at the same end of the opposite-pull screw rod are located on the inner side and the outer side of the formwork correspondingly, the outer side wall of the formwork separation blade abuts against the inner side wall of the formwork, and the inner side wall of the steel bar pressing piece abuts against the outer side wall of the formwork. The pouring formwork has the advantages that the pouring formwork is guaranteed to have enough strength when a concrete wall is poured, and meanwhile the formwork can be effectively prevented from deforming.

This invention discloses a pneumatic rust remover, comprising a gun-shaped body with a trigger and an on / off valve assembly mounted on the handle, and a cylinder. The gun-shaped body has a cylindrical cavity formed in its barrel section. The cylinder is installed in a cylinder sleeve and, together with the cylinder sleeve, piston, valve seat front cover, and valve seat rear cover, forms an impact assembly. A vibration damping and buffering assembly is installed inside the cylindrical cavity of the gun-shaped body. The vibration damping and buffering assembly consists of a connecting sleeve, an impact isolator, and a cylinder buffer pad. The cylinder buffer pad is press-fitted between the bottom of the cylindrical cavity and the rear end face of the connecting sleeve. The impact isolator is press-fitted onto the front annular surface of the connecting sleeve via a locking nut, and the locking nut is screw-fitted to the cavity opening of the cylindrical cavity. The rear end of the cylinder sleeve passes through the locking nut and extends into the sleeve cavity of the connecting sleeve, where it is screw-connected. An air inlet valve assembly is provided inside the sleeve cavity. This invention offers a comfortable grip, high rust removal efficiency, good shock absorption, and is adaptable to rust removal tools with different functions.

The invention relates to a main bearing locking nut anti-loosening structure and an aero-engine, belongs to the technical field of aerospace, and solves the problem of unreliable mechanical anti-loosening locking of a locking nut in the prior art. The anti-rotation device comprises a locking nut, a locking plate and an anti-rotation sleeve which are arranged outside a shaft neck of an engine rotating shaft in a sleeving mode. The locking nut fixing section is fixed to the shaft neck, and a first groove is formed in the outer portion of the clamping section in the circumferential direction. The locking plate comprises a locking plate main body, a first tooth and a second tooth; the first tooth is embedded into the first groove to limit the circumferential movement of the locking nut; the anti-rotation sleeve fixing part is connected with the shaft neck; the inner wall face of the anti-rotation part is attached to the outer wall face of the locking nut and the outer wall face of the locking piece. And the end part of the anti-rotation part is provided with a notch which is mutually embedded with the second tooth. Triple locking of the main bearing locking nut can be achieved, locking is reliable, and the structure is simple.

The invention discloses a combined piston rod type support oil cylinder which comprises a cylinder barrel, a mounting flange, a first rod body, a locking nut, a second rod body, a guide sleeve, a sleeve, a front gland and a rear gland, wherein the second rod body, the guide sleeve, the sleeve, the front gland and the rear gland are mounted in the cylinder barrel. The first rod body and the second rod body are in threaded connection to form a piston rod, trapezoidal threads are arranged on a rod body of the first rod body, the locking nut is in threaded connection with the first rod body, and the mounting flange is arranged on a barrel body of the cylinder barrel in a sleeving mode. The problem that the whole piston rod is difficult to maintain is solved, and quick replacement of the threaded section is achieved; hydraulic pressure maintaining is replaced by mechanical locking, and the oil leakage risk of the system is eliminated. The structure is particularly suitable for industrial equipment, oil drilling equipment and other high-load scenes needing long-term stable supporting, and the maintainability and reliability are remarkably improved while the bearing capacity is guaranteed.

The high-stability low-voltage wire tightener comprises an upper pressing plate, a middle pressing plate, a lower pressing plate and a shell, two screws are arranged at the bottom of the upper pressing plate, two middle holes and two lower holes are formed in the middle pressing plate and the lower pressing plate respectively, the screws sequentially penetrate through the middle holes and the lower holes, and locking nuts are connected to the screws; the pre-tightening mechanisms are arranged on the two sides of the lower pressing plate and matched with the two screw rods correspondingly, each pre-tightening mechanism comprises a pre-tightening knob, a follow-up block and a pre-tightening shaft sleeve, the pre-tightening shaft sleeves are installed on the peripheries of the screw rods, a plurality of conical teeth are vertically arranged on the side portions of the pre-tightening shaft sleeves, the two sides of the lower pressing plate are each provided with a circular truncated cone part, and movable cavities are formed in the outer ends of the circular truncated cone parts; a guide hole is formed in the inner end of the movable cavity, the pre-tightening knob is connected to the outer end of the circular truncated cone part, the follow-up block is arranged in the movable cavity, the pre-tightening knob is rotated to drive the follow-up block to axially slide, and a locking convex part is arranged on the follow-up block. When the nut is not screwed tightly or unscrewed, the cable cannot slide and fall off, high-altitude operation of a worker is facilitated, and the safety is higher.

The utility model discloses a connecting piece and an assembling structure, the connecting piece comprises a bolt body and a nut assembly, the bolt body is provided with a stud and a nut connected with the stud, the nut assembly comprises a first nut, a second nut and a locking nut, and the first nut, the second nut and the locking nut are all in threaded connection with the stud; the locking nut is located between the first nut and the second nut. An included angle is formed between the normal of the end faces of the two sides, in the thickness direction, of the locking nut and the extending direction of the stud, in the process that the first nut and the second nut approach each other oppositely, the locking nut can be extruded, the end face of the locking nut is made to be perpendicular to the stud, external threads of the stud deform, and the locking nut is locked on the stud. And the locking nut cannot rotate around the stud to change the position, so that the effect of locking the locking nut on the stud is achieved.

A torque control fastener system having a fastener nut, a helical wire insert, and a shaft, where the nut and helical wire insert have unique hardness and coefficient of thermal expansion relationships that produce improved performance.

The utility model relates to a vehicle hydrogen storage bottle opening sealing structure, which comprises a plastic inner container, a bottle valve seat, a joint and a locking nut, the bottle valve seat is positioned at the bottle opening of the plastic inner container, the joint is tightly connected in the bottle opening of the plastic inner container through a sealing structure, and the sealing structure and the plastic inner container are sealed by pressing the joint downwards through the locking nut and extruding the sealing structure. The metal connector, the sealing ring and the bottle opening of the plastic inner container are extruded to achieve sealing, the plastic inner container adopts the injection molding technology, the cylinder valve seat serves as an embedded part, the shoulder of the cylinder valve seat is wrapped in the plastic inner container, the binding force of the cylinder valve seat and the plastic inner container in the long-term working process of the gas cylinder is guaranteed, separation is avoided, and the service life of the gas cylinder is prolonged. The cylinder valve seat, the connector and the locking nut are simple in structure and easy to machine, the cylinder valve seat is fixed through the fixing tool, sealing can be achieved by screwing the locking nut through a tool wrench, and installation is convenient.

The utility model relates to the technical field of bolt looseness prevention, in particular to a lock bolt structure of mining machinery. The bolt comprises a bolt body, a fastening nut assembly, a disc-shaped gasket and a locking nut assembly. In the specific use process, a structural part penetrates through the screw rod and is fixed between the fastening nut assembly and the head of the bolt, then the dish-shaped teeth of the two dish-shaped washers are placed in the clamping ring in an attached mode, the clamping ring is clamped in the clamping ring by screwing the fastening nut assembly, and the clamping ring is in close contact with the dish-shaped washers and the fastening nut. When the fastening nut assembly tends to loosen, the locking nut assembly stops the fastening nut assembly from loosing, and the clamping plate is clamped in the clamping ring, so that the fastening nut assembly and the locking nut assembly cannot be away from each other; meanwhile, the convex blocks and the dish-shaped teeth are arranged on the dish-shaped gasket, so that the locking nut assembly is more effectively prevented from loosening and retreating, and the stability of the anti-loosening bolt structure of the mining machinery when the anti-loosening bolt structure is used on the mining machinery is ensured.

The utility model relates to a marine cold-mounted connecting shaft bolt dismounting device which comprises a supporting pipe, a connecting nut, a lead screw, a hollow plunger hydraulic oil cylinder and a locking nut. The two ends of the inner diameter of the connecting nut are provided with two kinds of internal threads respectively, one end of the connecting nut is connected with the cold assembly connecting shaft bolt through the internal threads, and the other end is connected with the lead screw. The connecting nut is sleeved with the supporting pipe, one end of the supporting pipe makes contact with the shaft flange, and the other end of the supporting pipe makes contact with the hollow plunger hydraulic oil cylinder. One end of the lead screw is connected with the connecting nut, the other end of the lead screw sequentially penetrates out of the supporting pipe and the hollow plunger hydraulic oil cylinder, and the locking nut is installed on the side, located outside the hollow plunger hydraulic oil cylinder, of the lead screw. In the initial state of disassembling the connecting shaft bolt, the locking nut is located at the tail end of a plunger rod of the hollow plunger hydraulic oil cylinder in the non-working state; the device is simple in structure, easy to operate, low in manufacturing cost and high in applicability.