127results about How to "Avoid braking" patented technology

The invention discloses a method and a system for avoiding the vehicle and pedestrian collision in road-vehicle coordination environment. The method comprises the following steps including (1) information collection: information used for identifying collision risk is collected; (2) driving state discrimination: the current driving state of a vehicle is discriminated; (3) collision risk identification: whether the collision risk exists or not is identified according to the collected collision risk information and the current driving state of the vehicle; (4) driving state discrimination: if the collision risk exists, whether the current driving state of a driver is normal or not is discriminated; (5) collision avoiding: a targeted avoiding method is adopted according to the driving state of the driver for implementing the collision avoidance. The method provided by the invention has the advantage that the in-time adaptation to the actual driving condition can be realized for realizing effective avoidance on different dangerous conditions.

The invention discloses a real-time predicting cruise control system based on economical driving. The real-time predicting cruise control system based on economical driving comprises an information collection module, a vehicle dynamics model establishing module and a receding horizon optimal calculation module, wherein the information collection module is used for collecting the driving state information, comprising speed information, the distance between a local vehicle and a front vehicle and the road traffic speed limiting information within the predicted distance, of the local vehicle and the front vehicle; the collected information is transmitted to the vehicle dynamics model establishing module; the vehicle dynamics model establishing module is used for establishing a vehicle dynamics model according to the collected traffic speed limiting information and the driving state information of the front vehicle and the local vehicle, establishing the control problem and determining the optimal objectives and satisfied constraint conditions; and the receding horizon optimal calculation module is used for obtaining the optimal gear sequence and an explicit solution of the optimal engine torque and braking force by optimizing through a method combing a Pontryagin minimum principle with a method of bisection on the basis of the control problem and the constraint conditions proposed by the vehicle dynamics model establishing module, and determining the optimal control rule.

The invention belongs to the technical field of vehicle intelligent aided driving and vehicle safety, and particularly relates to a self-adaptive cruise system which changes system self-adaptive cruise vehicle following performance by learning driver style behaviors online and has driving style learning capacity and an implementation method. The self-adaptive cruise system with the driving style learning capacity and the implementation method are designed for solving vehicle self-adaptive cruise control problems. The system is applicable to L2 automatic drive vehicles, and aims at achieving the purpose of self-adaptively following a vehicle in front in an actual driving scene through environment perception and information fusion; meanwhile, driving styles of specific drivers are consideredin a driving strategy of the system, so that the system has consistent satisfaction degree and acceptability for different people. To achieve the purpose, a mode of combining a linear quadratic typecontrol method and a reinforcement learning online learning method is adopted for better optimizing the system performance.

The invention provides a drive control device for a hybrid vehicle capable of reducing the discomfort of an occupant by releasing a shock in applying the driving force of an internal combustion engine. In the drive control device for a hybrid vehicle including an electric motor (2) and an internal combustion engine (3), when a load is less than a predetermined reference value, the drive wheels are driven only by driving force of the electric motor (2); when the load is the reference value or more, the drive wheels are driven by driving force of both the electric motor (2) and the internal combustion engine (3). A drive force detecting sensor (16) for detecting the drive force is arranged in midway of a drive force transmission system from the internal combustion engine (3) to the drive wheel (4). During the drive wheels are driven by driving force of both the electric motor (2) and the internal combustion engine (3), the controller preferably controls the electric motor to reduce the drive force provided by the electric motor when the drive force detected by the drive force detecting sensor (16) changes to a rising direction based on a rate of change over a predetermined reference value.

The embodiment of the invention provides a vehicle control method and control device and a vehicle. The control method includes the steps that the vehicle control device obtains the current opening degree value of a pedal of the vehicle; the control device determines the section where the pedal is located according to the current opening degree value and the opening degree threshold value of the pedal, specifically, the pedal can be located in the braking section or the driving section, the braking section is used for controlling the vehicle to brake, the driving section is used for controlling driving of the vehicle, the opening degree threshold value is determined by the number input by a driver or determined in a self-learning way on the basis of the driving habit of the driver; and the control device controls the vehicle to brake when determining that the pedal is located in the braking section, or the control device controls driving of the vehicle when determining that the pedal is located in the driving section. According to the vehicle control method and control device and the vehicle, control over driving and braking of the vehicle is achieved with one pedal, and control complexity of the vehicle is reduced.

A sine propulsion mechanism with adjustable swinging amplitude for robot dolphin is composed of machine frame, main motor, amplitude regulating motor, mainshaft with slide sleeve having ring slot, a conversion box with internal gear and external horizontal U-shaped and curved rack bars, a drive fork screwed on leading screw, a short axle inserted in vertical guide track, a horizontal slide way, and a rockerarm for controlling the tail swinging.

An engine brake method for vehicle retardance is provided. An engine operates at preset rotating speed (especially medium and low rotating speed); exhausting pressure of the engine can be adjusted via an exhausting current-limiting device (such as a turbocharger and an exhausting butterfly valve), so temperature of the engine can be controlled and medium of a preset volume can be ejected into an air cylinder or an exhausting pipe of the engine to increase cylinder internal pressure and motion resistance of a piston of the engine, thereby increasing engine braking power. When fuel oil working as medium is ejected into the cylinder, combustion of the fuel oil is controlled during compression stroke of the engine, so cylinder internal pressure and engine braking power can be further improved. A problem of low braking power of the engine at medium and low rotating speed in the prior art can be solved, and engine brake at high rotating speed can be reduced and even avoided; failure modes such as high load and high exhausting temperature due to high rotating speed brake can be eliminated; and reliability and durableness of engine brake operation can be improved.

The invention relates to an elevator system having an elevator car (2) displaceably disposed along at least two guide rails (6), and the elevator car (2) has a brake system having preferably two elevator brakes (20). The elevator brake device (20) includes a brake housing (21) and an energy accumulator (24). The brake housing (21) is mounted in a vertically displaceable manner, or such that it can be displaced in a longitudinal direction and in parallel relative to a brake direction between a first position (B1) and a second position (B2). The energy accumulator (24) acts upon the brake housing (21) and displaces the brake housing in the direction of a second position (B2). The elevator brake device (20) further comprises an actuator (32) that can act upon the brake housing (21) and is designed to retain the brake housing in a first position (B1). In its first position (P1), the actuator can retain the brake housing (21) in the first position (B1) against the force (F24) of the energy accumulator (24). In its second position (P2), the actuator allows displacing the brake housing (21) into the second position (B2). In this way, a brake element (25) is brought into contact with the brake rail (7).

A towed vehicle hitch tongue includes movably connected front and rear tongue members, and a fully exposed master cylinder connected at opposite ends thereof to the tongue members such that a rearward force urging the front tongue member toward the rear tongue member forces pressurized braking fluid out of a port thereof into a braking circuit configured to exert a braking force. The braking circuit prevents braking until the rearward force warrants braking, provides dampening of the brake action, allows the towed vehicle to reverse, and can provide emergency stopping and dampening of movement of the hitch tongue. Instead of using movable front and rear tongue members, sensors can detect what the towed vehicle is doing, and apply appropriate braking force in response.

The invention discloses a bend velocity automatic control method based on LTE-V. The method comprises the steps that an LTE-V vehicle-mounted unit which is installed on a vehicle is utilized to broadcast road information in real time according to an LTE-V road side unit which is installed in front of a bend and vehicle information transmitted by a vehicle CAN network to calculate safety critical velocity and the safety range for starting early warning before a vehicle enters the bend; when the real-time velocity of the vehicle is lower than the safety critical velocity, the safety critical velocity is simply prompted, and if the velocity is greater than the safety velocity, timely warning is instantly conducted. According to the method, the possibility of overturning and side spinning andinner wheel sliding displacement rate are taken into account when the safety critical velocity is calculated, so that the obtained safety velocity is scientific; the safety range of starting the earlywarning takes road surface situations into account, the method is safe and has no risks, and it is ensured that the velocity is reduced before entering the bend.

The invention relates to a control system for a motor vehicle (10), comprising: (a) at least one driving data sensor (20) for acquiring driving data characterizing a driving state of the motor vehicle; (b) at least one camera (24, 30) for capturing images of the surroundings; (c) an accident recorder (28) that is designed to record the images of the surroundings in a buffer; and (d) an electric controller (26) for controlling the driving data sensor (20), the camera (24, 30), and the accident recorder (28). According to the invention, the electric controller (26) is designed to trigger an autonomous braking action of the motor vehicle (10) when predetermined driving data and / or images of the surroundings are provided.

A semiconductor structure provided with an insulation structure in a moving unit is manufactured easily. An optical scanning mirror (semiconductor structure) is formed by processing an SOI substrate consists of a first silicon layer, an oxide film and a second silicon layer. A moving unit, which is supported on a fixed frame through first hinges, is formed on the first silicon layer. The moving unit is divided into a plurality of regions by forming trenches (insulation structure). A supporting member formed of the oxide film and the second silicon layer is formed just below the trenches. The plurality of regions of the moving frame divided by the trenches are joined to the supporting member so that the moving unit is swingable with the supporting member. Thereby, the supporting member is formed by simple etching processes, and thus, mechanical strength of the moving unit is ensured.

The invention discloses an intelligent traffic monitoring system capable of automatically braking an automobile, and the system comprises a central control module. The central control module is in communication connection with an on-site traffic monitoring module through a 4G wireless network, and is also connected with a database, a parking guide module, and a violation alarm prompt module. The parking guide module and the violation alarm prompt module are in communication connection with a short message transceiver of a car owner through a short message alarm module. The central control module is connected to a remote control unit of a remote control center through the 4G wireless network, and the remote control unit is also connected with a display screen, an alarm, and a remote command input unit. The on-site traffic monitoring module comprises a GPS positioning unit, an automobile braking unit, and an image collection unit. The system not only can achieve the monitoring of a plurality of control units, automatically brakes a violation vehicle, also can achieve the flow division, facilitates the alleviation of transmission pressure of system data, and improves the data transmission efficiency.

The invention relates to a catcher for a trackless rubber-tired vehicle applied to a coal mine auxiliary inclined shaft. The catcher comprises a speed measuring sensor, a controller and a vehicle stopper. The controller is provided with a remote switch. The vehicle stopper comprises a vehicle stopping support which is provided with an inclined roller path, the lower end of the inclined roller path is close to a roadway, and vehicle stopping foam is supported by the roller path. The remote switch and the speed measuring sensor are used in the catcher for starting the vehicle stopper, out-of-control downward sliding of a vehicle is prevented, and the problem that braking is only conducted in the vehicle, and consequently the vehicle cannot be stopped immediately is solved. Automatic control of the speed measuring sensor is used, and serious consequences caused by human errors are avoided. Gravity is used by the vehicle stopper, operation failures of the vehicle stopping foam due to machine breakdowns is avoided without the assistance of any other power. The vehicle stopping foam has multiple functions of stopping the vehicle, preventing collisions, buffering and the like, the accident rate of auxiliary transportation of the trackless rubber-tired vehicle for the coal mine auxiliary inclined shaft can be effectively reduced, and the safety of auxiliary transportation of coal mines is ensured.

The invention discloses a uniform type braking force balancing device and method of magnetic track brakes on both sides of a rail train. According to the uniform type braking force balancing device and method of the magnetic track brakes on both sides of the rail train, a front pressure sensor and a rear pressure sensor are arranged between force transmission boards of the magnetic track brakes and a force transmission column of a train steering rack; each magnetic brake is provided with six iron cores, and every iron core is wound with three coils; the rear end of the first coil of every iron core is directly connected with the negative electrode of storage batteries, the front end of the first coil of every iron core is connected with the positive electrode of the storage batteries through switches K4 and K1; the rear end of the second coil of every iron core is directly connected with the negative electrode of the storage batteries, and the front end of the second coil of every iron core is connected with the positive electrode of the storage batteries through switches K3 and K1; the front end of the third coil of every iron core is connected with the positive electrode of the storage batteries through switches K2 and K1, and the rear ends of the third coils of the six iron cores are connected with the negative electrode of the storage batteries through switches K5, K6, K7, K8, K9 and K10 respectively. The uniform type braking force balancing device and method of the magnetic track brakes on both sides of the rail train can effectively avoid brake deviation of the train due to the fact that the magnetic track brakes on both sides of the same steering rack generate overlarge brake force difference in different gear positions, and accordingly improves the braking safety of the rail train.

According to a vacuum failure auxiliary brake control system for an electric vehicle, the vacuum degree pressure value and the vacuum degree pressure value decreasing rate of a vacuum degree sensor are monitored in real time through a central controller, the fault level is judged according to the vacuum degree pressure value and the vacuum degree pressure value decreasing rate, and under the condition that a brake lamp switch is not triggered, in a certain data acquisition period, if the vacuum degree pressure value decline rate is greater than a set value 1, judging that the fault is a vacuum system air leakage first-level fault; in a certain data acquisition period, if the vacuum degree pressure value decline rate is greater than a set value 2, judging that the fault is a vacuum system air leakage secondary fault; and when the vacuum degree pressure value is smaller than the set value 4, the central controller judges that the vacuum system leakage three-level fault occurs, the central controller enters the state of preparing to start the vacuum failure auxiliary braking function, and meanwhile, a braking system fault lamp is turned on, a sound alarm is generated, and a fault code is recorded. According to the system, under the condition that the vacuum booster system fails, through logic setting of the central controller, the ESC and the motor driving system are cooperated to carry out braking and quit braking according to the intention of a driver, so that the driving safety is ensured.

The invention relates to a brake gap automatic regulating wedge mechanism in an arrester, and its technical solution: it comprises casing, wedge, compression spring, trolley, piston, roller push block, piston spring, driving ring, driving ring spring and regulating bolt, where the a vertical hole I and a horizontal through hole II are arranged in the casing, the outer end of the through hole II is provided with a conical plane P, the driving ring is arranged inside the conical plane P, one end of the driving ring spring supports against a shield and the other end supports against the driving ring to press the driving ring on the conical plane P, the piston is connected in the through hole II in sliding mode, the rear end of the piston is hinged with the roller push block, and the front side of the piston is provided with a spiral tooth, which is arranged in a spiral groove inside the driving ring, there is an axial gap ª€ between them, two sides of the lower end of the wedge are symmetrically hinged with trolleys corresponding to the roller push block, the regulating bolt is screwed with the piston and the front end of the regulating bolt is connected with an active fastening hoop. Its advantages: automatically compensating the brake gap; simple structure and low cost; not heating, low noise and not deflection.

A braking system includes a brake control system (BCS) (26) having a first output (30) and a second output (32), a first controller (34) having a brake command input (38) connected to the BCS first output (30), a direct enable input (36), an indirect enable input (44), a driver output (40) and an indirect enable output (42), a second controller (50) having a brake command input (54) connected to the BCS second output (32), a direct enable input (52), an indirect enable input (60), a driver output (56) and an indirect enable output (58). The first controller (34) produces an indirect enable signal on the first controller indirect enable output (42) when a direct enable signal is received at the first controller direct enable input (36) and a brake command signal is received at the brake command input (54), and produces a driver actuation signal on the first controller driver output (40) when a direct enable signal is present on the first controller direct enable input (52) and an indirect enable signal is present on the first controller indirect enable input (44) and a brake command is received on the first controller brake command input (38).

The invention discloses a method for dynamically optimizing washout coefficient to bring the movement platform overload capacity into full play. A cost function is used for determining a washout module coefficient, and positions and gestures of six freedom degrees of the movement platform are generated after the implementation of real-time dynamic optimization. The variation of the overload, which is generated in the middle of the stroke of a mechanism is greater than the variation of the positions and gestures of the six freedom degrees, which is generated by a constant coefficient washout module, and in an attachment to the stroke end of the mechanism, the actually achieved positions and gestures of the six freedom degrees of the movement platform after the output of a previous command are taken into consideration so as to prevent the frequent brake in the neighborhood of the stroke end of the mechanism, so that the movement platform overload capacity is brought into full play and the aim of maximally developing the movement platform performance is achieved. The invention is used for improving the fidelity of dynamic simulation of a flight simulator and relates to the field of dynamic simulation of the six-freedom-degree movement system of the flight simulator.

The invention relates to a pneumatic brake system for a trailer vehicle and to a brake control modulator for such a brake system. Taking this as a starting point, the invention specifies a pneumatic brake system for a trailer and a brake control modulator which permit a full braking action of the trailer with anti-lock function even in an emergency braking situation. For this purpose, a spring store neutralizing valve (7) is provided, by means of which the compressed air filled into the spring store cylinder by an electronic control device (2) can be at least partially held.

The invention provides a perpendicular shaft wind turbine with an adjustable windward area. The perpendicular shaft wind turbine comprises a main shaft and blades and further comprises a scissor fork type mechanism, sliding rails, a rope wheel, a servo taking-up and paying-off motor and ropes, the servo taking-up and paying-off motor is coaxially installed at the top of the main shaft, the scissor fork type mechanism is installed on the main shaft, the rope wheel is fixedly connected with an output shaft of the servo taking-up and paying-off motor, one end of each rope is fixed to the rope wheel, and the two ropes are the same in winding direction. The other ends of the ropes are fixedly connected with blade rotary shafts, one end or the middle of each blade is fixedly connected with the rotation center of the scissor fork type mechanism, the other ends of the blades are matched with the sliding rails, and the blades can move along the sliding rails but can not rotate around the rotary shafts of the blades. The wind turbine is installed by the adoption of a blade fixed pitch, and the radius of a wind wheel is controlled according to wind speeds, so that the pneumatic performance of the perpendicular shaft wind turbine is improved at different wind speeds. Meanwhile, the mechanics properties of the perpendicular shaft wind turbine are improved in a strong wind environment, even braking and shutdown stages can be avoided, and the working range of the wind turbine is greatly enlarged.

The invention discloses a wheel detachment device of a wheelchair. Wheels in a pair are installed on the two sides of a frame respectively through a middle shaft and are locked through steel ball locking mechanisms. Brake discs are fixedly installed on the wheels in the pair respectively, hand push rings are arranged on the wheels in the pair, limiting stop blocks are arranged on the two sides of the frame respectively, the frame is sleeved with a seat cover, locking holes in a pair are formed in the seat cover, a locking rod penetrates through the locking holes in the pair to lock the seat cover on the frame, brake calipers are fixedly installed on the seat cover and correspond to the brake discs, and the seat cover is also provided with limiting plates corresponding to the limiting stop blocks. The device has the advantages that the device is very convenient to use, the wheels are detachable, the space occupied by the wheels can be greatly reduced, and the wheelchair becomes very convenient to transport and move.

A device or apparatus that reduces the number of utility pole breakages occurring during severe weather events and facilitates quicker and more cost efficient repair of downed utility lines. The device secures utility lines such as power service lines to utility poles during normal operating conditions, but allow the lines to break free of the poles when severely stressed. This breakaway feature prevents the utility pole from breaking under high stress conditions such as storm damage, ice accumulation, felled trees and other unexpected emergency situations. Furthermore, the device allows for quick and efficient repair of downed power lines, thereby reducing the man hours and equipment necessary for repair. By protecting the utility pole, utility companies will realize significant cost savings by not having to replace the pole and, in some cases, having to replace expensive transformers.

The invention discloses an eccentric gear connecting rod mechanism which comprises a bottom plate, a side plate and a top plate. The side plate is vertically installed and fixed to one end of the bottom plate, the top plate is arranged in parallel, one end of the top plate is fixed to the top of the side plate, and the surface of the bottom plate is provided with a connecting rod assembly and a driving motor for driving the connecting rod assembly to move; and the driving motor is transversely arranged, the connecting rod assembly is formed by an eccentric gear installation base, an eccentric gear, a connecting rod and a load connecting block, the side face of the eccentric gear is provided with a connecting sleeve and a connecting column, the connecting sleeve protrudes upwards and is installed in a manner of being matched with an output shaft of the driving motor, and the connecting sleeve of the eccentric gear is provided with a first annular groove and a second annular groove. According to the eccentric gear connecting rod mechanism, one-way circling motion of the driving motor is converted into load rectilinear motion in a linear manner; the fixing positions of the connecting column in the grooves can be adjusted by screwing two fixed screws, the fixing position of the connecting rod is then adjusted, and the motion route of the connecting rod has adjustability.

The invention discloses a power generator forced excitation control method under the condition of power system has faults, and the method comprises the following steps that power generators with large installed capacity and high excitation response are selected from a power system, and forced excitation controllers are arranged to the power generators; and when the working system has faults, all power generators in the system are classified into an S cluster and an A cluster according to the power-angle information of the power generators which is measured in a phase measuring unit in a wide area measuring system, and equivalent power angles of the whole system are calculated. The forced excitation startup / exit moments of all power generator units are determined by integrating the clusters that the power generators are located in according to the change rules of the equivalent power angles. According to the power generator forced excitation control method under the condition of the power system faults, the power generator forced excitation is started / shut up in a gradual swing mode according to the swinging frequency of a transient stable process of the system, so that enough forced excitation control force is applied to key swinging frequency on the one hand and partial power generator forced excitation does not over-brake the follow-up swinging frequency of the system on the other hand, and the role of the power generator forced excitation control in improving the transient stability of the system can be fully displayed.

A multi-ratio automatic transmission (10) for a vehicle, the transmission (10) having at least one planetary gear set (16, 18), a plurality of friction elements (C1, C2, C3, B1, B2) for coupling components of the planetary gear set (16, 18) between an input and an output of the transmission in different configurations so as to achieve a plurality of drive ratios, and a control system (26) for selectively engaging / disengaging the friction elements (C1, C2, C3, B1, B2) in different combinations to effect selection of the ratios, wherein rate of engagement and / or disengagement of one or more of the friction elements (C1, C2, C3, B1, B2) is controlled independently of the or each of the other friction element(s) (C1, C2, C3, B1, B2).

The invention relates to a device (10) that is designed and equipped to completely remove at least one part of the breast cartilage (14) from a poultry carcass (13) that is free of breast meat, comprising a transporting conveyor (11) for conveying the poultry carcass (13) in a transporting direction T, said conveyor having at least one support body (12) for receiving and fixing the poultry carcass (13); cutting means (17) for separating the breast cartilage (14) or parts thereof from the poultry carcass (13); and a control device for controlling the cutting means (17). The device is characterized in that the transporting conveyor (11) is aligned with the support body or with each support body (12) and driven in such a manner that a poultry carcass (13) that is to be arranged on the support body (12) is oriented such that the poultry carcass connecting line between the breast bone (16) and the breast cartilage (14) is parallel to the transporting direction T. The cutting means (17) comprise a double blade (18) that is designed and equipped for longitudinally cutting into the poultry carcass (13) at least along a sub-section on both sides of the breast cartilage (14) and / or on both sides of the breast bone (16), and the cutting means (17) comprise a separating element (27) which is disposed downstream of the double blade (18) and which is designed and equipped for laterally cutting a connecting region (19) between the breast cartilage (14) and the breast bone (16), thereby completely removing the breast cartilage (14) from the poultry carcass (13). The invention further relates to a corresponding method.

The invention provides an alarm grading method based on an unmanned vehicle intelligent connection assistance system, belongs to the technical field of unmanned driving, and is used for realizing alarm and rescue functions of an unmanned vehicle. The method comprises an unmanned vehicle, a vehicle information processor, a main system server and a fault alarm system. The main system server comprises a central processing unit with a wireless transmission function and a cloud server; and the fault alarm system comprises a vehicle external obstacle alarm system, a vehicle internal part fault alarmsystem and a vehicle self-accident alarm system. According to the alarm grading method based on the unmanned vehicle intelligent connection assistance system, the main system server and the vehicle external obstacle alarm system are used in cooperation, so that surrounding accidents can be found in the running process of the unmanned vehicle, measures are taken, the case that obstacles around theunmanned vehicle damage the vehicle and brake the vehicle can be effectively avoided, and the use convenience of passenger members is improved.

The invention discloses a method and a system for avoiding the vehicle and pedestrian collision in road-vehicle coordination environment. The method comprises the following steps including (1) information collection: information used for identifying collision risk is collected; (2) driving state discrimination: the current driving state of a vehicle is discriminated; (3) collision risk identification: whether the collision risk exists or not is identified according to the collected collision risk information and the current driving state of the vehicle; (4) driving state discrimination: if the collision risk exists, whether the current driving state of a driver is normal or not is discriminated; (5) collision avoiding: a targeted avoiding method is adopted according to the driving state of the driver for implementing the collision avoidance. The method provided by the invention has the advantage that the in-time adaptation to the actual driving condition can be realized for realizing effective avoidance on different dangerous conditions.

The invention relates to a tool for preventing drill bit torque from being too high and belongs to the technical field of petroleum drilling tools. The tool comprises an upper joint, a disk spring, a conical sleeve, pushing pieces, a drive shaft and an output shaft, wherein the upper joint is arranged at the upper end of the drive shaft in a screw thread manner; the output shaft is sleeved on the lower end of the drive shaft; the conical sleeve is sleeved on the drive shaft; the disk spring is arranged between the conical sleeve and the upper joint; mounting holes are uniformly distributed in the circumference of the drive shaft; the pushing pieces are movably arranged in the mounting holes; one ends of the pushing pieces are in contact connection with the output shaft; and the other ends of the pushing pieces are in contact connection with the conical sleeve. In the working process of the tool, once the torque on the output shaft is too high, the pushing pieces leave from arc-shaped grooves of the output shaft, relative rotation can be produced between the pushing pieces and the output shaft and a drill bit at the lower part of the output shaft is avoided being braked, so that the damage of drill bit braking on a drilling assembly is avoided and the service life of the drilling assembly is prolonged; and the tool is particularly suitable for the installation and the application of the drilling tools.