51results about How to "Small locking force" patented technology

The invention discloses a bottom power taking self-locking electric bus battery box system capable of quickly changing a battery. The system comprises a battery box (1), a tray (2) used for bearing the battery box and arranged on an electric bus, mobile equipment (4) for conveying the battery box, and a grabbing device (5) arranged on the mobile equipment; and a battery box locking and unlocking device (3) is arranged on the tray. Through the system, automatic assembly of the battery box in the electric bus battery box system is realized, and the problems of over positioning, deformation of power wire connection pegs, breakage, arc discharge, welding, difficulty in automatically realizing unlocking due to impact of the battery box to a bolt of a locking mechanism in jolt and deformation of the battery box due to impact in jolt. The system is reasonable, reliable, simple and compact in structure, and can full-automatically, quickly and conveniently realize quick change of the power battery.

The invention provides a sliding bottom electricity-taking and self-locking electric bus battery quick-change pellet device. The electric bus battery quick-change tray device comprises a pellet and a locking and unlocking mechanism (3) mounted on the pellet. According to the invention, the battery box can be correctly positioned and reliably locked reasonably; the force is reasonably applied to the battery box; simple structure and simple and reasonable power wire splicing mode are obtained; and the arc discharge phenomenon can be effectively prevented.

The invention aims to provide an optional-position lockable hydraulic cylinder which comprises a cylinder body, a locking box body, a piston rod, a locking lever, a turning block and a lock claw. A front cover is fixed at the front end of the cylinder body, a rear cover is fixed at the rear end of the cylinder body, the locking box body is fixed on the rear cover, one end of the locking box body is fixed with a box cover, a piston is arranged in the cylinder body, a first oil mouth and a second oil mouth are respectively formed in the front end and the rear end of the cylinder body, one end of the piston rod is disposed in the piston, the left portion of the locking lever is located in the locking box body, the right end portion of the locking lever penetrates the rear cover to be disposed in the piston, the turning block provided with a cavity is disposed on the upper left portion of the locking lever, and a multihead trapezoidal thread of the turning block is arranged at the position of the cavity of the turning block and is engaged with a multihead trapezoidal thread of the locking lever. The optional-positional lockable hydraulic cylinder is simple and reliable in structure and especially suitable for being applied to occasions when the piston rod needs to stay in a certain position and bears larger pushing and pulling force.

The invention relates to a waterproof structure and a mobile phone utilizing the waterproof structure. The waterproof structure comprises a first shell and a second shell, wherein a first shell and a second shell are assembled together. The first shell is provided with a convex structure and the second shell is provided with a groove and at least one of them is made of soft material. The soft material and a corresponding shell are integrally formed and the convex structure and the groove are in interference fit. Through the interference fit, waterproof effect can be achieved between a front shell and a rear shell. Besides, to more effectively ensure the waterproof effect, a bump structure is further mounted in the side of inner surface of the convex structure. The bump structure is in interference fit with the groove side wall, thereby achieving double protection in waterproof effect between the front and rear shell. The invention further relates to a mobile phone utilizing the waterproof structure. Through the application of the waterproof structure between the front shell and the rear shell, waterproof effect between the front shell and the rear shell is effectively ensured, the assembly process is made simple and convenient, and production efficiency is promoted.

In a first hydraulic clutch device 36 provided with a first clutch inner 84, a pressure bearing plate portion 84D disposed on the first clutch inner 84 opposing driving and driven friction plates 85 and 86, a clutch piston 91 that is consecutively disposed to a pressurizing plate portion 91D and moves to the side to pressurize the driving and driven friction plates 85 and 86 in accordance with an increase in a hydraulic pressure in a control hydraulic chamber 96, a piston guide 92 that forms a control hydraulic chamber 96 between itself and the clutch piston 91, and a canceller plate 93 that forms a hydraulic canceller chamber 97 on the side opposite to the control hydraulic pressure chamber 96, a projection portion 133 of the canceller plate 93 and a notch portion 122 disposed in the piston guide 92 and engaged with the projection portion 133 are engaged with each other and assembled, and a clip 135 that is engaged with an engagement groove 123 of the notch portion 122 and regulates axial movement of the canceller plate 93 is disposed.

The invention provides a method for improving rigidity of drawing parts. Plate materials are subjected to drawing forming by means of a drawing die, dual drawing beads are arranged on the drawing die, a drawing bead which is close to a parting line is a first drawing bead, a drawing bead which is far from the parting line is a second drawing bead, a center distance L between the two drawing beads is 30mm to 50mm, the distance between the first drawing bead and the parting line L2 ranges from 15mm to 25mm, the size L3 of a plane portion between the two drawing beads is larger than 10mm, a plane between a die-entrance R angle of an upper die and the first drawing bead is an upper die management plane, the size of the upper die management plane is larger than 5mm, the drawing height of the drawing die is H3, and the drawing angle of the drawing die is A. according to the method for improving rigidity of the drawing parts, during drawing of the parts, different locking forces are achieved in different phases, and the condition that the parts have large locking forces during drawing so as to enable the plate materials to produce large deformations is guaranteed; during a late drawing phase, locking forces are reduced, feeding is easily performed, and the parts are not fractured, so that drawing rigidity of the pars is guaranteed in a maximum degree mode.

The invention relates to the technical field of low-voltage electric appliances, in particular to a wiring frame structure, a wiring terminal and a low-voltage electric appliance. The wiring frame structure comprises a wiring frame, the wiring frame is a frame body structure which is enclosed by a top edge, two side edges and a bottom edge and is internally provided with a wiring cavity for a wire to pass through and be fixed; the wiring frame structure also comprises at least one avoiding structure arranged on the inner wall of at least one side edge and sinks away from the wiring cavity, and the avoiding structure is suitable for providing an avoiding space for expansion of the wire when the wire fixed in the wiring cavity is electrified and heated. Through the arrangement of the avoiding structure, when the wire is heated to expand, the wire can be extruded into the avoiding structure, attenuation of locking force is reduced, meanwhile, the contact area of the wire and the wiring board is increased, contact resistance is reduced, temperature rise at the wiring position of a product can be reduced. The problem of over-high temperature rise caused by easy loosening of wires of an existing wiring frame structure due to thermal expansion is solved.

The invention discloses a protection mechanism of a horizontal injection molding machine. The protection mechanism comprises a hinge base, a labor saving lever and a horizontal plate. The hinge base is fixed to a fixed die. The position of the pivot of the labor saving lever is hinged to the hinge base through a rotating shaft. The horizontal plate and a machine tool moving door are fixed. The front end, close to the labor saving lever, of the horizontal plate is bent upwards to form an inclined face. When the machine tool moving door is closed, the machine tool moving door drives the inclined face of the horizontal plate to abut against a force exertion point on a power arm of the labor saving lever and drives the power arm to be overturned downwards. The fixed die is provided with an open slot communicated with a positioning hole of the fixed die. When the power arm overturns downwards to the limiting position, a resistance arm of the labor saving lever and the projection of the positioning hole in the plane where any cross section of the positioning hole is located do not intersect. According to the protection mechanism of the horizontal injection molding machine, assembly of a movable die and the fixed die of the injection molding machine is automatically limited when an operator opens the machine tool moving door, and the accident of risking personal safety of the operator is avoided.

The invention provides a door body self-lock device and a refrigerator. The door body self-lock device is used for the refrigerator, and a door body and a case body of the refrigerator are connected with each other through a hinge; the door body self-lock device comprises the hinge and a lock catch, wherein a locking pin and a spring which is always in a tensional state are installed on the hinge, the first end of the locking pin is rotatably connected with the hinge, the second end of the locking pin is provided with a first connecting portion, the first end of the spring is connected with the hinge, the second end of the spring is connected with the position, except the first end of the locking pin, of the locking pin, the spring can drive the locking pin to rotate, the hinge is provided with a limiting block used for limiting rotation angles of the locking pin, the lock catch is fixedly installed on the door body and provided with a second connecting portion, and the second connecting portion can be matched with the first connecting portion. The connection position of the first end of the spring and the hinge is located beyond the area through which the orthographic projection of the locking pin passes on the hinge along with rotation of the locking pin. Accordingly, by means of the technical scheme, it can be guaranteed that the refrigerator has a good thermal insulating property, and assisting force can be provided for a user when the door body is opened and closed.

The invention discloses a step height locking device and a self-balancing handlebar rod with a height step adjustment function. The step height locking device comprises a locking seat, a ball, a transmission block and a cam handle. A cam portion of the cam handle is hinged to the wall of a containing groove, the transmission block is located between the bottom face of the groove and the cam portion, the transmission block slides towards a mounting through hole under the action of the cam portion of the cam handle, and then the ball is pushed to protrude into the mounting through hole. An output end opening of a second handlebar rod body of the self-balancing handlebar rod with the height step adjustment function is sleeved with the locking seat, the ball directly abuts against the peripheral side face of a first handlebar rod body through a gap, and a gear counter bore is formed in the peripheral side face of the first handlebar rod. The step height locking device and the self-balancing handlebar rod with the height step adjustment function are convenient to use, good in locking effect and long in service life, a user can carry out unlocking and locking operations through the cam handle, the damage degree of the ball is greatly reduced, and meanwhile the reliability of the linkage process is improved.

A lamp buckle structure is used for detachably connecting a first component and a second component of a lamp, and the second component is provided with a buckle. The lamp buckle structure comprises a base, a lever, a rotating shaft and a telescopic rod. The base comprises a fixed bottom plate and two clamping arms. The lever comprises a handle portion and two connecting arms arranged at one end of the handle portion. Supporting arms are rotatably connected with the connecting arms. The rotating shaft is rotatably connected with the connecting arms, a cylindrical hole is formed in the rotating shaft, the axial direction of the cylindrical hole is perpendicular to the axial direction of the rotating shaft, the telescopic rod is in threaded connection with the rotating shaft, and the telescopic rod rotates relative to the rotating shaft and can move along the cylindrical hole. A retaining ring is rotatably connected with the end, away from the rotating shaft, of the telescopic rod, and the retaining ring can be hung on the buckle. When the handle portion is turned over, the lever rotates relative to the base, the telescopic rod moves relative to the rotating shaft, and the distance between the retaining ring and the rotating shaft is adjusted until the retaining ring is clamped to the buckle. After the lamp buckle structure is assembled, the magnitude of locking force can be adjusted according to needs. The invention further provides the lamp.

The invention provides an intra-die self-locking mechanism of a plastic die. The mechanism comprises a press strip arranged on the front die core; a switch T block; a guiding press block; and a frontdie oblique pulling member. Two sides of the guiding press block are respectively provided with a left self-locking stop block and a right self-locking stop block, which are abutted on the front die oblique pulling member. The left self-locking stop block and the right self-locking stop block are both provided with a reset spring. When die assembly is carried out, a space exists between the oblique surface of the T block and the oblique surface of the stop block. The left self-locking stop block and the right self-locking stop block are both provided with a flat vertical surface that matches with the front die oblique pulling member. A mechanical self-locking mechanism is adopted, the locking force of an oil cylinder is reduced, the size of a used oil cylinder is reduced, and the service life of the oil cylinder is prolonged. The provided intra-die self-locking mechanism has the advantages of simple operation and high efficiency, and can guarantee the stability and prevent retracting.The product processing precision and product appearance are guaranteed. The efficiency is high, and the cost is low.

The invention provides a camshaft toggling solenoid valve for a variable valve lift system applied to the technical field of the engine variable valve lift system. The camshaft toggling solenoid valvefor the variable valve lift system comprises a shell (1), wherein a solenoid coil is arranged in the shell (1), a sleeve (4) is arranged in the solenoid coil (2), a magnetic core (4) is arranged in the sleeve (3), the magnetic core (4) is connected with a driving rod (5), a strong magnet (6) is arranged at one end of the shell (1), and the magnetic core (4) is close to the strong magnet (6). According to the camshaft toggling solenoid valve for the variable valve lift system, the structure is simple, and the extension and the contraction of the driving rod can be reliably realized, so that the axial toggle control of a camshaft is effectively realized through the driving rod under a specific working condition of an engine under the control of a control part, switching of high and low camsis realized through the cooperation of the extended driving rod and a track groove on the camshaft, and the overall performance of the engine is improved.

The invention discloses a hole sealing door device which includes a hole sealing door, a first locking mechanism and a first sealing mechanism. The area of the hole sealing door is larger than the hole area, the hole sealing door includes a hole sealing door plate and a hole sealing door bottom plate, the first locking mechanism comprises first front face locking units and first back face lockingunits, the first front face locking units are used for locking the hole sealing door plate and a wall from the front face of the hole sealing door, and the first back face locking units are used for locking the hole sealing door plate and the wall from the back side of the hole sealing door; and the first sealing mechanism comprises first hole sealing gaskets which are arranged between the hole sealing door plate and the wall and between the hole sealing door plate and the hole bottom. Correspondingly, a transportation method is also provided. The problems that the size of a sealing door in the prior art is small, if the sealing door needs to adapt to a large-sized door hole, the structure is complicated, the construction period is long, and it is difficult to ensure the sealing performance and safety are solved.

The invention relates to a parking brake unit and an electromechanical brake clamp, and the parking brake unit comprises a cylinder assembly which is internally provided with a cavity with a hole; an energy storage assembly which is located in the cavity and comprises a disc spring cylinder body fixed to the cylinder assembly; a disc spring sleeve sleeved in the disc spring cylinder body; a disc spring assembly I located in the disc spring sleeve; a guide piece positioned in the disc spring assembly I and fixedly arranged at the end part of the disc spring cylinder body; a supporting piece located in the cavity and arranged with the disc spring sleeve in a spaced mode; a disc spring assembly II located in the cavity and arranged between the supporting piece and the cylinder body assembly; a wedge-shaped piece, wherein one end, close to the bearing slope, of the wedge-shaped piece is connected with the disc spring sleeve, and the other end penetrates through the disc spring assembly II to be connected with the supporting piece; a thrust output control unit connected with the disc spring cylinder body; and a locking assembly located between the disc spring cylinder body and the disc spring sleeve. The parking brake unit is compact in structure, high in energy storage efficiency, small in axial size and light in weight, and energy is generated by elastic potential energy of the disc spring set.

The invention relates to a bicycle handle folding mechanism which is simple in structure, easy to unfold and lock and firm in locking. The bicycle handle folding mechanism comprises a handle seat, a left handle rod, a right handle rod and a locking mechanism. The handle seat is composed of a connecting base capable of being connected with a bicycle stand pipe, an upper extending plate and a lowerextending plate. The handle rod is provided with an open arc-shaped groove; when the handle is unfolded, the handle ends of the handle rods rotate and are unfolded towards the two sides respectively,a connecting rod of the locking mechanism is clamped into the open arc-shaped grooves in the other ends of the left handle rod and the right handle rod, and the other ends of the left handle rod and the right handle rod are located between the upper extending plate and the lower extending plate in an up-down overlapped mode. According to the handle folding mechanism, the left handle and right handle overlapping locking technology is adopted, and the effects that after the bicycle folding handle is unfolded, a locking operation is easy and firm, and the handle is not loosened are achieved.

The invention discloses a bike saddle fixture. The front side of the upper end of a saddle tube is provided with two transverse grooves which are matched with saddle bows; the rear side on the upper end of the saddle tube is pressed and provided with a locking device; vertical grooves used for fixing the saddle bows are arranged between the upper end of the saddle tube and the locking device; the bike saddle fixture consists of transverse grooves, vertical grooves and the locking device. The bike saddle fixture disclosed by the invention uses the connection rigidity of the front end of the bow skillfully, so as to lock the bows in the transverse grooves on the front turned edges of the saddle fixture; the front parts of the bows can be locked into the transverse grooves at the same time just by locking the rear parts of the bows in the two vertical grooves at two points, so that the bows are fixed and firm, avoided from dropping off, and superior to the four-point locking of the traditional bows; and half of the locking force is reduced.

The invention discloses a bottom power taking self-locking electric bus battery box system capable of quickly changing a battery. The system comprises a battery box (1), a tray (2) used for bearing the battery box and arranged on an electric bus, mobile equipment (4) for conveying the battery box, and a grabbing device (5) arranged on the mobile equipment; and a battery box locking and unlocking device (3) is arranged on the tray. Through the system, automatic assembly of the battery box in the electric bus battery box system is realized, and the problems of over positioning, deformation of power wire connection pegs, breakage, arc discharge, welding, difficulty in automatically realizing unlocking due to impact of the battery box to a bolt of a locking mechanism in jolt and deformation of the battery box due to impact in jolt. The system is reasonable, reliable, simple and compact in structure, and can full-automatically, quickly and conveniently realize quick change of the power battery.

The invention discloses a box cover locking mechanism which comprises a spring bolt and a lock body. The lock body comprises a base plate and a front cover plate, wherein a horizontal groove is formed in the base plate, a pulling rod is arranged in the horizontal groove, a perpendicular guide groove is formed in the position, above the horizontal groove, of the base plate, the perpendicular guide groove comprises a first conical groove, a rectangular groove and a second conical groove, the first conical groove, the rectangular groove and the second conical groove are sequentially connected from top to bottom, the first conical groove gradually shrinks from top to bottom, the second conical groove is gradually expanded from top to bottom, a sliding block, a left lock hook and a right lock hook are arranged in the perpendicular guide groove, and the upper end of the left lock hook and the upper end of the right lock hook are respectively provided with a hook body. The lower end of the left lock hook and the lower end of the right lock hook are hinged to the sliding block, a spring is arranged between the lower end of the left lock hook and the lower end of the right lock hook, an actuation rod is arranged between the lower end of the sliding block and the middle of the pulling rod, the upper end of the spring bolt is an installation end for being fixed on the box cover, a boss is arranged at the lower end of the spring bolt, the boss is arranged between the left lock hook and the right lock hook and clamped on the hook bodies of the upper end of the left lock hook and the upper end of the right lock hook, and the front cover plate is fixed on the surface of the base plate. The box cover locking mechanism is compact in structure, large in locking force, and small in space required by operation.

The invention provides a camshaft toggle solenoid valve for a variable valve lift system applied in the technical field of an engine variable valve lift system. The camshaft toggle solenoid valve for a variable valve lift system includes a casing ( 1), the casing (1) is provided with an electromagnetic coil (2), the electromagnetic coil (2) is provided with a sleeve (3), the sleeve (3) is provided with a magnetic core body (4), and the magnetic core body (4) is connected with the drive The rod (5) is connected, and a strong magnet (6) is arranged at one end of the shell (1), and the magnetic core body (4) is close to the strong magnet (6). The variable valve lift system of the present invention uses a camshaft to toggle the solenoid valve, The structure is simple, and the extension and contraction of the drive rod can be reliably realized, so that under the control of the control component, under the specific working conditions of the engine, the axial movement control of the camshaft can be effectively realized through the drive rod. The track groove on the camshaft cooperates to realize the switching of high and low cams and improve the overall performance of the engine.

The invention provides a screw destructive torque measuring device and measuring method. The screw destructive torque measuring device includes: a pedestal, two parallel sides of an upper surface of the pedestal being provided with mutually symmetrical clamping grooves; a pedestal sliding block inserted in the pedestal clamping grooves; a rotating mechanism which is mounted on the pedestal and includes a first lead screw, a first lead screw nut, a first gear, a second lead screw, a second lead screw nut, a second gear, a rotary handle and a third gear; and a clamp module is arranged between the pedestal sliding block and the pedestal and includes a first screw clamp and a second screw clamp whose side edges are provided with grooves respectively, and the grooves being matched and jointly forming a cylindrical groove. The device can rapidly and accurately measure a numerical value of destructive torque of a screw, and can perform measurement circularly, thereby saving resources, and greatly satisfying a requirement of an enterprise for rapidly measuring the numerical value of destructive torque.

The invention relates to a repeated locking and releasing mechanism, in particular to a linkage type space repeated locking and releasing mechanism. The linkage type space repeated locking and releasing mechanism aims at solving the problem that reliability and controllability of an existing locking and releasing mechanism in the locking process are poor. The linkage type space repeated locking and releasing mechanism comprises a repeatable locking and releasing mechanism and a linkage driving mechanism. The repeatable locking and releasing mechanism comprises a locking mechanism and a locked assembly. The locking mechanism comprises a connection rod, a rocker connection rod shaft, a rocker, a lock hook rocker shaft, a lock hook, a locking shell, a bearing base, a worm, a worm gear, a first transition gear, a first transition gear shaft, a second transition gear shaft, a second transition gear, a crank gear, a crank connection rod shaft, a rocker shaft and a crank gear shaft. The linkage type space repeated locking and releasing mechanism is used in the aerospace field.

The present invention proposes a flywheel mechanism for a strap connection and unlocking device, which is characterized by comprising: a left casing, a right casing, a bearing, a flywheel, a left-hand screw, a right-hand screw, a loading nut, a platform support, and a separation nut , Double-ended screw, plunger, bayonet, first shaft, mounting seat, flywheel, left-handed screw, right-handed screw, and loading nut are tape connectors; plunger and bayonet are tape connection unlocking pieces; When inserted into the flywheel slot, the strap connection is realized. When the pin rotates out of the slot, the circumferential constraint of the flywheel is released, the flywheel rotates relative to the left and right screws, and the left and right screws are pulled out from the flywheel to unlock the strap. The invention adopts the flywheel to rotate and unlock instead of the explosive bolt to unlock, which can prolong the unlocking time of the strap and realize the slow release of the pre-tightening force of the strap. The unique unlocking technology can greatly reduce the shock caused by the unlocking of the strap.

The invention relates to a separating clutch for a hybrid power module, said separating clutch having an intermediate shaft in order to transmit torque from a crankshaft driven by an internal combustion engine to a transmission input, wherein a central flange is present fixed to the rotor, and The driven disk is connected to a torque transmission element, such as a toothed plate, and there is at least one transmission-side pilot bearing in order to at least radially support the countershaft, wherein the transmission-side pilot bearing is mounted on the torque transmission element and the central flange between. The invention also relates to a hybrid module having a rotor-integrated separating clutch according to the invention and a crankshaft with a downstream damping device.

The invention relates to a rotating hub type automatic focusing lens which comprises a main mirror base, an upper cover, a rotating hub assembly, a motor assembly, a view field positioning assembly and a limiting switch. The rotating hub assembly and the motor assembly are both arranged in the main mirror base. The upper cover is fixedly connected to one side of the main lens base. The limiting switch is fixedly connected to the inner side of the upper cover. The motor assembly drives the rotating hub assembly to rotate to the position of 0 degree or 90 degrees. The rotating hub assembly is further provided with a triggering device used for colliding with and triggering the limiting switch to stop the motor assembly. The view field positioning assembly is arranged on one side of the main lens base and used for locking the rotating hub assembly when the rotating hub assembly rotates to the position of 0 degree or 90 degrees. The beneficial effects are that the focusing speed is high andthe optical axis consistency is good. The requirements on manufacturing and mounting processes are low, and the requirement on large-batch production is met. The change of the azimuth direction is realized by only interactively changing between a 0-degree position and a 90-degree position, the switching speed is extremely high, and the requirements of rapidness and maneuverability are met.

The invention relates to a waterproof and shockproof structure comprising a first housing and a second housing. The first housing includes a first bottom case and a first outer casing that is made of flexible materials and covers the first bottom case; and a groove is arranged at the first bottom case. The second housing includes a second bottom case and a second outer casing that is made of flexible materials; the second outer casing is provided with a protruding structure and covers the second bottom case and the second outer casing and the second bottom case are formed into an integrated mode. The protruding structure of the second outer casing and the groove of the first bottom case are in an interference fit relation, so that the first housing and the second housing are assembled together. Because the first outer casing and the second outer casing are made of the flexible materials, the shockproof function is realized; and on the basis of the interference fit, the waterproof property between the housings is realized. In addition, the invention also relates to a mobile phone based on the structure; and thus the mobile phone has the dual waterproof and shockproof functions.

The invention discloses a large-inclination-angle tilting platform based on a six-bar mechanism, which belongs to the field of mechanical testing and testing devices. The invention realizes the rotation of the platform from a horizontal state to a large inclination angle state based on a connecting rod configuration of a Stevenson structure chain of a planar six-bar mechanism. In the present invention, the lead screw is driven by the motor and the reducer, so that the propulsion table with the nut moves back and forth on the guide rail, and the propulsion table is used as a slider in the plane six-bar mechanism to drive the six-bar mechanism to move, so that it is fixed on the six-bar mechanism. The workbench is tilted and rotated at a large inclination angle. The present invention overcomes the disadvantages of low precision of the traditional hydraulic tilting platform, small range of inclination angle or complex rotation mechanism, and also overcomes the disadvantages of the traditional crank slider mechanism that the required thrust of the tilting platform slider changes drastically with the platform inclination angle, and the thrust is large when the inclination angle is small. The invention has the advantages of large load-carrying capacity of the workbench, gentle change of the required thrust of the slider with the inclination angle of the platform, high inclination angle positioning accuracy, etc., and is convenient for application in related fields.

The invention relates to a self-locking bolt assembly. The self-locking bolt assembly comprises a bolt with a conical nest hole, an expansion block and a cover-shaped nut, wherein the bolt, the expansion block and the cover-shaped nut are easy to machine, the mechanical strength of the bolt is not affected, mounting and dismounting are easy, the tension borne by the bolt is reduced while the boltand the cover-shaped nut are locked, and the load bearing capacity of the bolt is improved.