108results about How to "Avoid self-locking" patented technology

A motor vehicle brake, in particular an electromechanically actuable motor vehicle brake, having an actuator subassembly, including a housing, a servo element which is movable in relation to the housing, for moving a brake pad, a motorised drive, a movement mechanism arranged between the motorised drive and the movable servo element, a gear arrangement associated with the movement mechanism, wherein the movement mechanism has a ball screw with a spindle that can be driven in rotation and a nut that can be displaced linearly in the housing, wherein the nut may be moved, for moving the servo element, by driving the spindle in rotation within the housing. In this motor vehicle brake it is provided for the gear arrangement to have a wrap spring clutch which is arranged in the flow of force between the motorised drive and the spindle such that the wrap spring clutch permits torque to be transmitted from the motorised drive to the spindle, and is constructed to block transmission of torque from the spindle to the motorised drive.

The invention discloses a multi-suspension-centres crane which comprises main beams, an operating mechanism, a lifting mechanism and an electric control system, wherein the operating mechanism comprises a bearing mechanism composed of an idle wheel device and an elastic body, and a drive mechanism composed of a motor, a reducer, a winding drum group, two groups of steel ropes, a pulley block and a pulley bracket, wherein the lifting mechanism comprises more than 2 sets of winding machines on each main beam, adopts a multilayer winding and symmetrical rope mode of duplex winding drums and steel ropes, and adopts a mode that a hook connecting piece is respectively hinged or fixedly connected with a corresponding hook group through a pin roll. The multi-suspension-centres crane has the characteristics of safety and reliability, strong practicability and the like through the self-set corresponding control method, is suitable to a crane with ultra-high lifting load, especially the multi-suspension-centres crane for lifting by sections on an offshore drilling platform.

The invention discloses a safety starting method preventing a central processing unit (CPU) from self locking. In an embedded system, a storage space is explored in a flash memory to store a plurality of firmware mirror images. System initialization is carried out, a firmware is searched in the storage space to be loaded on a system on chip, if the firmware is searched, correctness and integrity of the searched firmware are judged, and the firmware is operated when the conditions of the correctness and the integrity are met simultaneous; if the firmware is not searched, a next firmware is searched in the storage space; if the firmware is not searched in the storage space or if correct and integral firmware is not searched in the storage space, a flow of firmware loading failure is switched into. By means of the safety starting method preventing the CPU from self locking, self locking of the CPU is effectively avoided through exactness identification of the firmware and judgment of damage or not.

The invention belongs to nuclear power plant pressurized water type reactor structure technology, and particularly discloses a ball cone irradiation sample stopple with a self-locking pressurized water reactor. The stopple is composed of an upper end head, a substrate, an optical shaft, a water pressure pushing rod, a cone ring, a ball, a locknut and two springs, wherein the upper end head is positioned at the upper end of the substrate, the spring is arranged in the substrate, the cone ring is positioned at the lower end of the substrate, the water pressure pushing rod penetrates the center of the cone ring and enters the inner cavity of the substrate, the cone surface of the cone ring is fitted with the ball, and the two springs are mounted outside the water pressure pushing rod in a sleeving manner. The cone ring and the ball are mounted below the substrate, and the ball and the cone ring are tightly fitted, through the adoption of the designed pushing rod structure, and the cone surface pushes the ball outwards to ensure that the ball and the wall of an irradiation sample hole are locked automatically. The irradiation sample stopple is simple and not high in processing precision, and can not be affected by cold water long term corrosion in operation process. Higher safety margin can be obtained after uniform loading of a plurality of balls, and the additional arrangement of the overload protection structure can further improve safety.

The invention relates to a nonlinear curve eccentric cam type quick clamping device. When a handle of a nonlinear curve eccentric cam is closed, the eccentric cam reaches a highest point to realize a clamping function; the curve surface of the cam is a nonlinear curve surface, and a self-locking and anti-falling function is realized; when a spanner is pulled, the eccentric cam reaches a lowest point, and under the action of a tension spring, a fixed slip groove and a movable slip groove are loosened. In the invention, the clamping force is regulated through regulating the connecting threads of a pull rod sleeve and a pull rod shaft, thus the eccentric cam can be used for realizing the functions of quickly assembling and disassembling, quickly clamping, self-locking and preventing loosening. The eccentric cam has the advantages of compact structure, small size, light weight, convenience for operation, and the like and solves the problems of slower mounting, complicated operation and low efficiency of the traditional clamping device.

The invention relates to a high-accuracy stably-operated automobile chassis power measuring machine flywheel set system, and belongs to automobile performance detecting equipment. The system mainly comprises a main shaft assembly (A), a flywheel assembly (B), a brake assembly (C), a main shaft stabilizer assembly (D) and a frame (E), wherein the main shaft assembly (A) is arranged on the frame (E) through bearing seats (3) at both ends and the main shaft auxiliary stabilizer assembly (D) in the middle; the flywheel assembly (B) consists of a plurality of sets of clutches and flywheels with different rotating inertias, and is sleeved on the main shaft assembly (A) through a bearing and a bearing bush; and the flywheels are arrayed on the main shaft in a mode that the massive flywheels are distributed on both sides of the bearing seats, the separation and the combination of the flywheels with greater mass are controlled by double clutches, and the brake assembly (C) is fixed on the frame (E). The system aims to solve the problems of stable operation during high speed testing, high simulation quality accuracy, small axial size during simulating the same rotating inertia, and the like.

A motor vehicle brake, in particular an electromechanically actuable motor vehicle brake, having an actuator subassembly, including a housing, a servo element which is movable in relation to the housing, for moving a brake pad, a motorized drive, a movement mechanism arranged between the motorized drive and the movable servo element, a gear arrangement associated with the movement mechanism, wherein the movement mechanism has a ball screw with a spindle that can be driven in rotation and a nut that can be displaced linearly in the housing, wherein the nut may be moved, for moving the servo element, by driving the spindle in rotation within the housing. In this motor vehicle brake it is provided for the gear arrangement to have a wrap spring clutch which is arranged in the flow of force between the motorized drive and the spindle such that the wrap spring clutch permits torque to be transmitted from the motorized drive to the spindle, and is constructed to block transmission of torque from the spindle to the motorized drive.

The invention discloses an electric lifting flat plate vulcanizing machine for rubber production, which comprises a base and a lifting seat. The two sides are connected with uprights, the inside of the uprights is connected with a straight rack, the middle part of the lower end of the lifting seat is connected with a lifting motor, the upper end of the lifting motor is connected with a driving wheel, the two ends of the driving wheel are meshed with a driven wheel, and the upper end of the driven wheel is connected with a rotating shaft. The upper end is connected with a worm, and the inner side of the worm is meshed with a worm wheel. The coaxial position of the worm wheel is connected with a lifting wheel. The lower end of the lifting seat is provided with a connecting plate. With water tank. The present invention realizes the vulcanization of rubber, and the purely mechanical structure is easy to operate, avoids the leakage of oil and water, ensures the cleanliness of the equipment itself, and has high reliability.

The invention discloses an automobile micro electric jack which comprises a direct current 12V motor with an electromagnetic drive brake, a four-level reduction gear system, a lifting screw, a bottom plate and an outer shell, wherein the lifting screw is a screw structure which is formed through mounting screws of three levels in a sleeving manner; and the lifting screws of the three levels are ball screw structures. The automobile micro electric jack is small in volume, has the advantages of highly smooth operation, precise locating, low torque, high rigidity, super silence, and the like, during lifting, and is labor-saving and rapid, and the motor lifts to jack up an object.

The application relates to a controllable release system comprising an implantation instrument and a conveying system. A plurality of first holes are formed in the near-end area of the implantation instrument. The conveying system includes a plurality of traction rods and a plurality of release wires; the plurality of release wires, the plurality of traction rods and the plurality of first holes are in one-to-one correspondence in number and position; each traction rod is provided with a second hole and a constraint part; the second holes are formed in the far ends of the traction rods; the release wires penetrate the constraint parts and the first holes or the second holes to realize connection between the implantation instrument and the conveying system. During the conveying process, theconstraint parts can limit movement of the release wires; and when the implantation instrument is released, the release wires can move relative to the traction rods. According to the system, the implantation instrument is convenient to repeatedly recover timely before dismounting of the implantation instrument; and during the releasing process, the implantation instrument can slowly stretch to anoptimal form from a sheath tube, detachable connection can be realized by withdrawing the release wires to realize the controllable release function. The system is simple in overall structure, convenient to operate, safe and reliable.

A solid particle thermal expansion vibration composite forming process of a car rear axle housing includes: shrinking diameter to obtain a reducing pipe blank, heating, assembling a primary-bulging die, performing primary bulging to obtain a primary-bulging pipe blank, heating again, assembling a secondary-bulging die, performing secondary bulging to obtain a secondary-bulging pipe blank, heating for the third time, assembling a pressing die, and pressing to obtain the car rear axle housing. The process has the advantages that the problem of equipment seal in transitional car rear axle housing hydraulic bulging is solved; formability of the car rear axle housing is increased evidently, die assembly force is reduced during forming, and the thinning ratio even crack probability of the formed car rear axle housing are reduced; vibration plastic forming is used, so that pipe blank plastic deformation resistance can be lowered, machining quality of the car rear axle housing can be improved, and machining energy consumption of the car rear axle housing can be lowered; the relative motion conditions between the die and a workpiece is improved, and 'self-locking' among solid particles during car rear axle housing forming is avoided.

A compound cycloidal gear reducer with retainer relates to transmission, its fixed wheel is fixed on the inner wall of shell, the centre is equipped with round hole and the right side is equipped with compound cycloidal groove; the output disc is matched with the shell rotationally through bearings, left side is equipped with compound cycloidal groove or several equispaced circular holes; the bow-wave wheel is installed between the fixed wheel and the output disc, the left side is equipped with compound cycloidal groove and the right side is equipped with compound cycloidal groove or several equispaced circular hole; the opposite compound cycloidal groove or round holes are equipped with corresponding balls in itself, each ball is maintained by corresponding retainer; the eccentric sheave and input axle pass through the fixed wheel central round hole and are nested in the bow-wave wheel, and they are combined into input device through bearings. The eccentric sheave input axle rotates, each compound cycloid and ball form decreasing function and the output disc decelerates and outputs. The device has the characteristics of high efficiency, low noise, simple structure and etc. it can be widely used in various automated mechanical systems.

The invention discloses a push-pull type self-locking connector. The connector consists of a male head and a female head, wherein one of the male head and the female head is used as a first end of theconnector; and the other one is used as a second end of the connector. An outer sleeve is arranged at the first end. A lock sleeve slidably sleeves an outer side of the outer sleeve. A first lock retreating groove, a locking point and a second lock retreating groove are sequentially arranged in an inner wall of the lock sleeve along an axial direction, a side hole is arranged in an outer wall ofthe outer sleeve, a lock ball is arranged in the side hole, a spring acting in the axial direction is arranged between the outer sleeve and the lock sleeve, and when a spring is located at a balance position in an assembling state, the locking point right faces the side hole. An outer cylindrical surface is arranged at the second end, and an annular groove is arranged in an outer cylindrical surface in a circumferential direction and corresponds to the lock ball. Quick insertion and self-locking of the connector are realized through push-pull action of the lock sleeve, the connector is in a locked state during self-locking, reliability is very high, and the connector cannot be pulled out for unlocking in a pulled state if a pulling force towards an outer end is not actively applied to thelock sleeve.

The invention discloses a high-efficiency rock breaking drilling head for adjusting and controlling the lateral cutting ability adaptively. The high-efficiency rock breaking drilling head comprises adrilling head connector and a drilling head hat portion which are fixedly connected, wherein the drilling head hat portion is evenly provided with a plurality of drilling head cutter wings in the circumference direction, the drilling head cutter wings extend from the side wall of the drilling head hat portion to the end portion of the drilling head hat portion, the outer end faces of the sides, close to the drilling head connector, of the drilling head cutter wings extend outwards in the radial direction to form gauge protection blocks, the front ends of the drilling head cutter wings in the clockwise directions are provided with a plurality of main cutting teeth in the generatrix direction, the rear ends of the main cutting teeth on the drilling head cutter wings are provided with subsidiary cutting teeth, the front ends of the gauge protection blocks in the clockwise directions are provided with a plurality of the main cutting teeth in the generatrix direction, and the rear ends of the main cutting teeth on the gauge protection blocks are provided with gauge protection subsidiary teeth with the end portions being capable of performing elastic stretching and contracting. Accordingto the high-efficiency rock breaking drilling head for adjusting and controlling the lateral cutting ability adaptively, adaptive adjusting of the main cutting teeth on the gauge protection blocks onthe well wall cutting depth is realized by utilizing the gauge protection subsidiary teeth capable of performing the elastic stretching and contracting, so that the effect of adjusting and controlling the overall lateral cutting ability of the drilling head is achieved.

The invention discloses a simultaneous ring which comprises an outer ring and an inner ring. A plurality of stopping blocks are distributed on the end face, far away from a gear, of the outer ring in the circumferential direction, and a notch is formed between every two adjacent stopping blocks; the inner ring comprises a circular-ring-shaped base provided with an inner conical surface and an outer conical surface, and therefore an inner taper angle A and an outer taper angle B are formed, the value of the inner taper angle A needs to be set to be small, and the value of the outer taper angle B needs to be set to be large; and a plurality of protruding blocks are distributed on the end face, far away from the gear, of the circular-ring-shaped base in the circumferential direction, the multiple protruding blocks are clamped into the multiple notches, the circumferential width of the protruding blocks is smaller than the circumferential width of the notches, and therefore the outer ring is allowed to be rotated by a certain angle relative to the inner ring. The invention further discloses a double-ring single-conical-surface synchronizer with the above simultaneous ring. By means of the simultaneous ring, larger simultaneous capacity can be guaranteed under the condition of one single conical surface, the self-lock adhesion phenomenon can be avoided, impact in the ring pulling process after synchronization is avoided, gear shifting is smooth, manufacturing is convenient, and the production cost is low.

The invention relates to a hoisting mechanism of a multi-lifting-point joint crane, adopting double wound roll, steel wire rope multi-layer wrapping and symmetrical rope dropping types, and adopting the type that lifting hook connecting pieces are respectively hinged or fixedly connected with corresponding lifting hook groups through pin rolls. The invention has novel structure, solves a series of problems that deflection angles of steel wire ropes of a super-heavy large-span crane is not easy to be ensured, horizontal wrapping distance of the steel wire rope is too long, the efficiency of the mechanism is tool low, self-locking is easily caused for the mechanism, lifting joints are not synchronous, construction difficulty is large, and the like, has the characteristics of security, reliability and strong practicability, can avoid fatal security risk, is suitable for the crane with 10000-ton super-large hoisting duty, and is especially suitable for the multi-lifting-point joint crane for lifting when a marine drilling platform form abutting joint with subsections.

The invention discloses a multistage juice and peel separating device for passion fruits. The separating device includes a feeding mechanism, main shaft power mechanisms, grab bucket mechanisms, a linear cutting mechanism, juice separation mechanisms, spongy layer separation mechanisms, popup mechanisms, a push-in roller mechanism and a peel separation mechanism; the feeding mechanism is installedat the upper part on the rear side of a supporting platform; the two main shaft power mechanisms are symmetrically arranged on the supporting platform; four grab bucket mechanisms in circumferentialuniform distribution are installed on each main shaft power mechanism in a radial direction; the grab bucket mechanisms are provided with openings corresponding to the supporting platform; the linearcutting mechanism is installed on the rear side of the supporting platform; the two juice separation mechanisms are symmetrically installed at the lower parts of the openings; the two spongy layer separation mechanisms are symmetrically installed on the two sides of the supporting platform; the popup mechanisms are installed at the rear parts of the grab bucket mechanisms; the push-in roller mechanism is installed in front of the grab bucket mechanisms; and the peel separation mechanism is installed at the lower part of the discharging port of the push-in roller mechanism. Thus, the multistageprocessing of the juice and peels of the passion fruits can be realized, processing can be automated, so that the separating device is time saving and labor saving.

The electric retractable view device for a vehicle includes a view device rotating section including a view section body mounted therein, a rotation support section that supports the view device rotating section so as to be rotatable relative to a predetermined rotation axis, and an electric driving mechanism that electrically moves the view device rotating section to either of a retracted position and an extended position. The electric driving mechanism includes a motor, and a power transmission mechanism that transmits a drive force of the motor to the view device rotating section to rotate the view device rotating section in the direction around the rotation axis. The power transmission mechanism includes a double-threaded worm, and one or more motor-side worms disposed on the motor side relative to the double-threaded worm. Each of the one or more motor-side worms is a single-threaded worm.

The invention relates to the technical field of lifters, in particular to a lifter fixing device. The device comprises a shell, wherein two rotating shafts are connected between the inner walls of thetwo sides of the shell through bearings, two worms are connected to the outer wall of each of the two rotating shafts through flat keys respectively, four connecting cylinders are connected to the outer wall of the bottom of the shell through bolts, a stud is connected into each connecting cylinder through a bolt, a supporting block is arranged at the bottom of each stud, evenly-distributed anti-skid protrusions are arranged at the bottom of each supporting block, a thrust bearing is arranged in each supporting block, and the bottom end of each stud is inserted into the corresponding thrust bearing. According to the device, connecting blocks are driven to move through rotation of a double-thread screw, so that the connecting blocks drive wheels to be folded and unfolded through connectingrods and lifting rods, the wheels can be folded when a lifter mounted at the top of the shell does not move, the lifter is supported only through the studs, the whole operation is simple, convenientand fast, and the device is suitable for practical application.

The invention relates to a compensation device (9) having a variable compensation volume (13, 22) for use in a brake system (1) in order to carry out a recuperation operation, comprising: an electrohydraulic actuator (10) for providing a variable compensation volume (13, 22); and a guard valve (15) which is configured to separate the compensation volume (13, 22) from an inlet-side inlet volume (31) with respect to an external pressure change if an absolute pressure in the inlet volume (31) exceeds a predefined pressure threshold value. Furthermore, the invention relates to a motor-vehicle brake system having a compensation device of this type.

The invention provides a mechanical section hoop positioner and an application method thereof. The positioner comprises a shell, wherein a plurality of pressing plates are uniformly fixed on the outerwall of the shell at intervals along the circumferential direction, a long-strip-shaped hole is formed in each pressing plate, a sensing block is embedded inside the long-strip-shaped hole, an arc leaf spring is cushioned between the sensing block and the shell, the arc roof of the arc leaf spring is in contact with the sensing block, and the sensing blocks and the pressing plates are connected with a hinge control mechanism. The hinge control mechanism consists of small holes, a pin shaft and grooves, the small holes are formed in the sensing blocks along the short edges of the long-strip-shaped holes and penetrate through the sensing blocks, two opposite grooves are formed in each pressing plate, and respectively correspond to two openings of the small holes, the pin shaft passes through the small holes, and the two ends of the pin shaft are in lap joint with the inside of the grooves and can move in the radial direction along the shell. The upper and lower end surfaces of the sensing block are not in contact with the pressing plates all the time, so that the risk of drilling jamming caused by easy self locking of the sensing blocks as the lower end surfaces or the upper end surfaces of the sensing blocks prop against the pressing plates simultaneously when a sensing convex part props against the end surface of a sleeve can be avoided.

The invention discloses a building capable of avoiding cross infection through indoor foul air control. The building comprises a sealed heat preservation room body, an air supply system, an air exhaust system, a ventilation heat recovery system, an environment source heat exchange system and a refrigerating and heating system; one or more personnel gathering belts are distributed in the sealed heat preservation room body; the air supply system comprises a fresh air supply end communicating with an indoor space; the air exhaust system comprises a foul air receiving end communicating with the indoor space; and the refrigerating and heating system comprises an indoor refrigerating and heating device and a fresh air refrigerating and heating device, wherein the indoor refrigerating and heating device is used for refrigerating and heating air in the sealed heat preservation room body to the set indoor ideal temperature, and the fresh air refrigerating and heating device is used for refrigerating and heating fresh air supplied by the air supply system to the range lower than the set indoor temperature limit value. Foul air and fresh air released in the technology cannot be crossed or mixed, and therefore indoor cross infection can be avoided.

The invention discloses a banknote conveying bag device capable of authenticating in a bidirectional mode. The banknote conveying bag device comprises a banknote conveying bag, an anti-fake seal and a reader-writer, wherein a zipper structure capable of opening or closing the banknote conveying bag is arranged on the banknote conveying bag, the anti-fake seal is arranged on the banknote conveying bag and is used for locking or unlocking the zipper structure, the anti-fake seal comprises a lock cylinder structure with an electric sealing device, the reader-writer is used for controlling the anti-fake seal, reading and writing the banknote sealing information of the electric sealing device and sending locking or unlocking instructions to the electric sealing device so as to enable the electric sealing device to output signals enabling the lock cylinder structure to execute locking or unlocking operation, and the reader-writer is provided with a digital signature generation unit for generating digital signatures. The banknote conveying bag device can improve the safety of instruction transmission controlled by the reader-writer.

A special quick clamping mechanism designed for increasing efficiency and improving the quality of clamping systems that can be used in various vises, C-clamps and all other clamping applications. This invention applies a concept of using two sets of opposing thread angles; one thread set is used at engagement, while the other is used at clamping. By using these two sets of opposing helix angles it creates opposing axial forces against each other, so as to force the clamping thread set to rotate first in the process of releasing a clamping force. This function would prevent a sudden drop in clamping force; a problem most quick clamping designs having in the industry. And, a collar jam preventing device that can stop a collar in the radial direction before it bumps into an axial dead end, which causes a tight jam and becomes hard to crank in the subsequent working cycle.

The invention provides a handheld tin soldering device. The handheld tin soldering device comprises three parts, namely a tin discharging device, a heating device and a feeding device, wherein the feeding device comprises a lower clamping head, a locking loop, a thermal insulation shell, a feed piston, an upper clamping head, a press key, a reset spring and a feed spring; each of the lower clamping head and the upper clamping head is an elastic body and can tightly clamp or release tin wires; under the action of the press key, the reset spring and the feed spring, the lower clamping head and the upper clamping head can realize the feeding of tin wires and the resetting of the device; the heating device can melt the fed tin wires internally; and the tin discharging device is used for guiding molten tin out. The handheld tin soldering device has the benefits as follows: the feed amount of tin wires can be manually controlled, tin wires are prevented from getting stuck, and the waste of tin wires is reduced during the manual tin soldering process; besides, the tin soldering device can be operated by one hand during use, and the tin soldering process is safe and convenient.

The conducting apparatus is for the position alteration of conducting blades (6) in a turbocharger exhaust gas turbine flowed through axially. The blades are arranged axially symmetrically to the turbine axis (1) in an exhaust gas flow channel (14) and can be pivoted by a pivot device around a radially fitted axis (8). To each blade is fitted a shaft (18) which extends through a housing wall radially outwards from the flow channel. This shaft with its outwardly extending part is rotatably located around a pivot axis (8). The pivot device contains a positioning ring (19) rotatable around the turbine axis and positioning levers (20) transmit torque from the positioning ring to the shaft of each blade.

The invention discloses a fixing structure of light bars in an LED backlight module. The fixing structure of the light bars in the LED backlight module comprises LED light bar PCBs (Printed circuit boards) and a metal back plate; the LED light bar PCBs are provided with at least one U-shaped groove; the metal back plate is provided with positioning columns which are formed by stamping and used for matching with the U-shaped grooves, and is also provided with a plurality of first limit protrusions and a plurality of second limit protrusions, the first limit protrusions and the second limit protrusions are formed by stamping, two long sides of the LED light bar PCBs abut against the positions of the first limit protrusions and the second limit protrusions to enable the LED light bar PCBs to be clamped between the first limit protrusions and the second limit protrusions, the first limit protrusions are also provided with elastic press pieces to press the surfaces of the LED light bar PCBs towards the large surface of the metal back plate. The fixing structure of the light bars has the advantages of being easy and convenient to install, high in production efficiency, relatively low in costs, accurate and reliable in positioning, not easy to slip off in vibration and drop tests, good in contact between the light bars and the metal back plate and capable of smoothly conducting heat out through the metal back plate.

The invention discloses anti-panic rope ascender / descender equipment. The anti-panic rope ascender / descender equipment comprises a body, a movable cam and a releasing and clamping mechanism, wherein a lockhole is formed in one end of the body, one end of the movable cam stretches into the end, deviating from the lockhole, of the body, the end of the body is hinged with the movable cam, and a first rope threading gap is formed between the end of the movable cam and the body; the releasing and clamping mechanism comprises a handle, a first friction element and a second friction element, andthe first friction element and the second friction element are arranged on the handle; one end of the handle is hinged with the end, deviating from the body, of the movable cam; and a second rope threading gap is formed between the first friction element and the second friction element. The anti-panic rope ascender / descender equipment is simple in structure, by arranging the first rope threadinggap, the second rope threading gap and the movable cam, the anti-panic rope ascender / descender equipment is smooth when a rope ascends and is locked automatically within a very short travel when the rope is loaded, and self-locking can be achieved during descending when a user instinctively clenches the handle due to panic caused by rapid falling.