32results about How to "Flexible and convenient movement" patented technology

The invention discloses a shedding device of a weaving machine, which adopts an electric machine to independently drive each heald frame. The device comprises a plurality of sets of driving mechanisms (3) for driving heald frames (4). The driving mechanisms (3) comprise electric machines (5), driving swing arms (6) and parallelogram linkages (7). The output ends of the driving swing arms are hinged with connecting rods (11) of the parallelogram linkages (7), the driving swing arms (6) and side links (9) are not only of the same length but also are parallel to each other. The electric machines (5) drive the driving swing arms (6), the output ends of the driving swing arms drive the connecting rods (11), and the connecting rods (11) transmit the driving power to the side links (9) at the left sides and right sides of the parallelogram linkages (7) so as to enable the heald frames (4) to complete reciprocating linear motion. In the invention, the driving mechanisms (3) do not occupy any space expect that of a weaving machine rack (12), so that the weaving machine (1) occupies obviously reduced space, the sizes of the driving mechanisms (3) are uniform and only electronic setting is required to adjust heald frame (4) stroke.

Provided is a mine tunnel compressed air sequent conveying device. The mine tunnel compressed air sequent conveying device is composed of a compressed air pipe, a T-shaped sliding rail and an air collection sliding block. The air collection sliding block slides on the T-shaped sliding rail, a sliding block contactor is arranged on the air collection sliding block, a one-way valve is in a closed state when the sliding block contactor on the air collection sliding block does not contact a centre, with slide of the air collection sliding block, the one-way valve is in an open state when the sliding block contactor contacts the centre, and then compressed air enters an air collection cavity, and enters a pneumatic device through an external air pipe connector, and therefore real-time air supply for the pneumatic device is achieved. The mine tunnel compressed air sequent conveying device and the conveying method of the mine tunnel compressed air sequent conveying device achieve the purposes that the compressed air can be continuously supplied as an electric slide wire, an air tank or a long air conveying pipe is unnecessary, and therefore air supply is quick and convenient.

The invention provides an eight-degree-of-freedom surgery mechanical arm comprising a closed-loop connecting rod. The eight-degree-of-freedom surgery mechanical arm comprises a position adjustment assembly, a posture adjustment and a surgery instrument, wherein the posture adjustment assembly is connected onto the position adjustment assembly, the posture adjustment assembly has the characteristicof telecentric fixed point, the surgery instrument is connected onto the posture adjustment assembly, the position adjustment assembly is used for adjusting the position of the telecentric fixed point, and the posture adjustment assembly is used for adjusting the posture of the surgery instrument. The eight-degree-of-freedom surgery mechanical arm has the beneficial effects as follows: a hinged arm is connected with a slide rail assembly, the position of the telecentric fixed point can be adjusted at multiple degrees of freedom, the posture adjustment system can adjust postures of the surgeryinstrument around the telecentric fixed point in multiple directions to drive the surgery instrument to realize telecentric movement required by a minimally invasive surgery, the structure is simpleand flexible, and small space is occupied. The system comprises a closed-loop connecting rod module, a drive group required by joints is effectively moved forwards, is simple in structure, stable inmovement, decoupled in posture and convenient and flexible to drive.

The invention discloses a tunneling and drilling all-in-one machine, which comprises a development machine (1) and a drilling machine (2), which comprises a drilling machine part (22) and an installation rack (21), wherein the drilling machine (2) is connected on a cutting arm of the development machine (1) through the installation rack (21). The drilling all-in-one machine also comprises a hydraulically driven traversing mechanism (23), wherein the drilling machine part (22) is rotatably coupled on a horizontal plane with the installation rack (21) through the traversing mechanism (23). In drilling operations, the drilling machine part can rotate left and right relative to the installation rack to adjust boring angle and height, so as to realize good boring effects; In a tunneling operation, the drilling machine part turns backwards and recedes back to save space over the cutting arm of the development machine. Accordingly, the drilling machine part of the tunneling and drilling all-in-one machine can move flexibly and conveniently, and has a reasonable layout and small space occupation, so that installation and dismounting process of the drilling machine is convenient.

The invention discloses an electric slab lying vehicle for automobile repairing. The electric slab lying vehicle comprises a device main frame, wherein a steering motor and a travelling motor are respectively arranged on one side and the back part of the device main frame; a steering shaft is arranged at the front part of the device main frame; the steering shaft is connected with a steering disc; the steering disc is matched with a steering main gear arranged on the steering motor through a transition gear; the travelling motor is matched with a travelling bevel gear; the travelling bevel gear meshes with a driven bevel gear arranged on a transmission shaft; the two ends of the transmission shaft are connected with rear wheel shafts arranged on rear wheel seats through couplings; rear wheels are mounted on the rear wheel shafts in an interpenetrating manner; and a steering controller and a travelling controller are further arranged at the upper part of the device main frame. According to the electric slab lying vehicle for automobile repairing, power is supplied through a storage battery, the entire device moves forwards, moves backwards, rotates leftwards and rotates rightwards through electric control, the motion is flexible and convenient, the operation is quite simple, strength of repair personnel is saved, and repair personnel are comfortable when using the vehicle.

The invention relates to the forging field, and aims to provide a forging method for a magnesium-alloy automobile hub. The forging method for the magnesium-alloy automobile hub comprises the following steps: step I, heating a magnesium alloy rod in a heating furnace; step II, pre-forging the magnesium alloy rod; step III, carrying out pre-profiling forging on disc-shaped blank; step IV, carrying out fine-profiling forging on a pre-profiled hub; step V, carrying out fine-shaping forging on a fine-profiled hub; step VI, transferring the fine-shaped hub to a transfer table for heating through a position transfer device, wherein a heating temperature is controlled to 320 DEG C to 450 DEG C; and step VII, carrying out rim extrusion sizing on the fine-shaped hub. The forging method for the magnesium-alloy automobile hub is relatively high in production efficiency; and the magnesium-alloy automobile hub is compact in texture, is uniform in component, and is relatively high in mechanical strength.

The invention discloses a tunneling and drilling integrated machine which comprises a tunneling machine (1) and two drilling machines (2), wherein each drilling machine (2) comprises a drilling machine part (22) and a mounting frame (21); the two drilling machines (2) are respectively connected on two track frames (11) on two sides of the tunneling machine (1) through the mounting frames (21); and in each drilling machine (2), the drilling machine part (22) is rotatably connected with the mounting frame (21) in a horizontal plane and the drilling machine part (22) can rotate around the front end of the mounting frame (21) in a vertical plane of the length direction is located. Therefore, the drilling machine parts can rotate up and down and swing left and right relative to the mounting frames; the angle and the height of drilling can be adjusted through the relative motion of the drilling machine parts and the mounting frames during the drilling operation, the drilling machines are mounted on the track frames of the tunneling machine and the drilling operation of the drilling machines can be realized without the help of a cutting arm of the tunneling machine; and the drilling machine parts can be rotated and retracted backwards during the tunneling operation and the occupied space can be further reduced.

The invention relates to a non-contact type power supply device for supplying power to an automatic doffer, belonging to the technical field of power supply. The power supply device comprises a power supply line, a power frequency power supply and a power receiving unit, wherein the power receiving unit comprises an iron core, a coil and a magnetic body; the power supply line comprises two parallel cables of which the two ends are connected, the power supply line is erected on the path parallel with the track of the automatic doffer through a bracket, and the length of the power supply line is equal to the length of the track; the power frequency power supply is connected with the leading-out end of the power supply line; the iron core is installed at the lower part of a trolley of the automatic doffer; the coil is wound on an intermediate post of the iron core; the power supply line is arranged in two spaces among three posts of the iron core; a magnetic body is arranged under the iron core; and the magnetic body and the iron core together form a magnetic loop. The device can supply power required by the trolley of the automatic doffer in a non-contact power supply mode during operation, and the device has simple structure and low manufacturing cost.

The invention discloses a mechanical interlocking transmission device of isolating switches. The transmission device comprises a transmission device body, a moving-side mechanical locking device and a fixed-side mechanical locking device. The moving-side mechanical locking device is connected to a moving-side vertical connecting rod of the isolating switches and used for controlling closing and opening of the isolating switch on the moving side. The fixed-side mechanical locking device is connected to a fixed-side vertical connecting rod of the isolating switches and used for controlling closing and opening of the isolating switch on the fixed side. A moving-side pulling rod and a fixed-side pulling rod are fixedly arranged on the moving-side mechanical locking device and the fixed-side mechanical locking device respectively, and the free end of the moving-side pulling rod is connected with the free end of the fixed-side pulling rod through the transmission device body for transmission. When the isolating switch on the moving side is closed, the earthing switch on the fixed side is opened; when the isolating switch on the moving side is opened, the earthing switch on the fixed side is closed. Control over the switch on the moving side and the switch on the fixed side is achieved through the correspondingly arranged moving-side mechanical locking device and fixed-side mechanical locking device, interlocking of the moving side and the fixed side is completed through transition of the transmission device body, and therefore single-side switch closing is achieved in the same state.

The invention discloses a laser device fixing device and a method for achieving temperature self-adaption through the laser device fixing device and relates to a laser cutting device and a cutting temperature control method. The laser device fixing device and the method for achieving temperature self-adaption through the laser device fixing device aim at solving the problem that due to the fact that the cutting temperature is not stable in the existing laser-assisted cutting process, the surface machining quality is seriously affected. The laser device fixing device comprises a base, a rotating mechanism, a stretching mechanism, an adjusting mechanism and a transmitting mechanism. The transmitting mechanism, the adjusting mechanism, the stretching mechanism and the rotating mechanism are sequentially arranged from front to back. The rotating mechanism is arranged on the base. The transmitting mechanism comprises a connecting end face, a fifth rotating motor, a second hydraulic cylinder, a laser transmitter, a plurality of rotating shafts and a plurality of infrared ray inductors. The method for achieving temperature self-adaption includes the steps of establishing a temperature database, monitoring temperature, feeding back information and adjusting current. The laser device fixing device and the method for achieving temperature self-adaption through the laser device fixing device are used for laser heating assisted cutting.

The invention relates to the forging field, and aims to provide a forging method for a magnesium-alloy automobile hub. The forging method for the magnesium-alloy automobile hub comprises the following steps: step I, heating a magnesium alloy rod in a heating furnace; step II, pre-forging the magnesium alloy rod; step III, carrying out pre-profiling forging on disc-shaped blank; step IV, carrying out fine-profiling forging on a pre-profiled hub; step V, carrying out fine-shaping forging on a fine-profiled hub; step VI, transferring the fine-shaped hub to a transfer table for heating through a position transfer device, wherein a heating temperature is controlled to 320 DEG C to 450 DEG C; and step VII, carrying out rim extrusion sizing on the fine-shaped hub. The forging method for the magnesium-alloy automobile hub is relatively high in production efficiency; and the magnesium-alloy automobile hub is compact in texture, is uniform in component, and is relatively high in mechanical strength.

The invention discloses a digging and drilling integrated machine which comprises an excavator (1) and a drilling machine (2), wherein the drilling machine (2) comprises a drilling machine part (22) and an installation frame (21); the drilling machine (2) is connected to a cutting arm (11) of the excavator (1) by the installation frame (21); and the drilling machine part (22) is rotatably connected with the installation frame (21) in a horizontal plane, and the drilling machine part (22) can rotate around the front end of the installation frame (21) in a vertical plane where the length direction of the drilling machine part is. Therefore, the drilling machine part can rotate up and down and swing left and right relative to the installation frame; during the drilling operation, the drilling machine part can move with the movement of the cutting arm of the excavator, and adjust the angle and height of the drill holes through the relative movement of the installation frame, so that the drilling machine part can drill higher or lower holes; and during the advancement operation, the drilling machine part is rotated backwardly and taken back, and the space is saved, so that the excavator can perform tunnel boring more freely.

The invention provides a robot used for pruning branches and leaves of bamboos in the technical field of robots. The robot used for pruning the branches and leaves of the bamboos comprises five partsincluding a robot pipe body a, a power device b, a work device (disk saws) c, a walking device d and a control device e; one end of a pipe assembly Ia-1 is connected to one end of a pipe assembly IIa-2 through a hinge a-3, the other end of the pipe assembly Ia-1 is connected to the other end of the pipe assembly IIa-2 through a hasp a-4, disk saws c are arranged on the outer sides of the pipe assembly Ia-1 and pipe assembly IIa-2 respectively and connected with a motor b-2, and the motor b-2 is connected with a control component e which controls the motor b-2 to run or stop. The robot used forpruning the branches and leaves of the bamboos is simple in structure and can achieve efficient and fast pruning of the branches and leaves of the bamboos; meanwhile, during pruning of the branches and leaves of the bamboos, the reliability is high, the crawling performance is great, and the work efficiency is high, so that a great amount of manpower and material resources are saved, the work efficiency is improved, and the operation is simple and practical.

The invention discloses a power-assisted manual forklift based on a lever principle. The power-assisted manual forklift comprises a forklift frame, a goods fork and a linear controller, wherein the goods fork is used for supporting goods, and the linear controller is arranged on the forklift frame. The forklift frame comprises a base, wheels, a large arm and a lifting arm, wherein the wheels and the large arm are arranged on the base, and the lifting arm is rotatably connected with the large arm. The goods fork is arranged on the lifting arm. The large arm comprises two large arm bodies, brackets and foot wheels, wherein the two large arm bodies are connected with the base, the brackets are connected with the large arm bodies and positioned below the large arm bodies, and the foot wheels are arranged on the brackets. A linear actuator is positioned between the two large arm bodies and connected with the base and the lifting arm. According to the power-assisted manual forklift based onthe lever principle, the wheels are taken as fulcrums, and a labor-saving effect is achieved by utilizing the lever principle; and the power-assisted manual forklift is easy and convenient to use, easy to process and manufacture, convenient and flexible to move, high in safety, efficient, wide in application range, good in carrying capacity, and capable of effectively reducing the labor intensity.

The invention relates to an ablation device. The ablation device comprises a sheathing canal, a plurality of annular electrodes and a driving mechanism, wherein the sheathing canal is provided with a main cavity channel and a plurality of containing cavity channels communicating with the main cavity channel, the containing cavity channels are mutually independent, and the end, away from the main cavity channel, of each containing cavity channel is an open end; the annular electrodes are slidably connected with the containing cavity channels in a one-to-one correspondence manner, so that each annular electrode has a first position and a second position which are mutually switched, and when the annular electrodes are located at the first position, the annular electrodes extend out of the containing cavity channels; when the annular electrodes are located at the second position, the annular electrodes are accommodated in the containing cavity channels; and the driving mechanism is connected with the annular electrodes and is used for driving the annular electrodes to slide relative to the sheathing canal. The contact area of the ablation electrode and the tissue can be enlarged, so that the ablation efficiency and the operation success rate are improved.

The invention relates to a single-wheel electric vehicle with steering wheels, and belongs to the field of electrics. The single-wheel electric vehicle comprises a handlebar supporting rod which is fixed to a pedal bottom plate through a bearing, a wheel is arranged on the pedal bottom plate, the bottom end of the handlebar supporting rod is connected with the wheel, a handlebar is fixed to the handlebar supporting rod, the wheel is connected with a motor through a transmission chain, the motor is connected with a battery, and both the motor and the battery are fixed to the pedal bottom plate.

The invention discloses passenger car luggage compartment auxiliary equipment which structurally comprises top rail rods uniformly and fixedly arranged at the top of a passenger car luggage compartment, a top translation device for driving the equipment to slide is arranged on the top rail rods; a side wall rail is fixedly arranged on the side wall of the passenger car luggage compartment; a railgroove is formed in the side wall rail; a side wall translation device for driving the equipment to move is arranged in the rail groove; a connecting rod assembly for connecting and stabilizing equipment is arranged on the outer side of the side wall translation device; the tail end of the connecting rod assembly is provided with a dragging and hoisting clamping device used for clamping and dragging and hoisting assemblies on the connecting rod assembly. The dragging and hoisting clamping device is matched with the top translation device in a clamping manner; a positioning adjusting device used for adjusting positioning is arranged at the tail end of the dragging and hoisting clamping device, and a luggage bearing device used for bearing luggage is arranged at the tail end of the positioning adjusting device. The passenger car luggage compartment auxiliary equipment is small in size and arranged in a luggage compartment, luggage can be carried into the passenger car luggage compartmentto be arranged in sequence, and the equipment assists in taking out the luggage.

The invention relates to a three-wheeled movable C arm X-ray machine comprising a moving mechanism. The moving mechanism comprises a base, three supports and three turning wheel units. The three supports are arranged on the base, the three turning wheel units are rotatably arranged on the three supports respectively, an equilateral triangle is constituted by a connecting line of central points of the three turning wheel units, and the rotating centerlines of the three turning wheel units are perpendicular to three centerlines of the equilateral triangle respectively. The moving mechanism of a three-wheeled structure is adopted for the three-wheeled movable C arm X-ray machine, the structure is simple, small space is occupied, cost is effectively reduced, and the whole three-wheeled movable C arm X-ray machine is flexible and convenient to move.

The invention discloses auxiliary equipment for the luggage compartment of a passenger car. Its structure includes a top track bar evenly fixed on the top of the luggage compartment of a passenger car. The top track bar is provided with a top translation device for driving the equipment to slide. There is a side wall track, and a track groove is arranged in the side wall track, and a side wall translation device for driving the equipment to move is arranged in the track groove, and a connecting device for connecting and stabilizing the equipment is arranged on the outside of the side wall translation device. Rod assembly, the end of the connecting rod assembly is provided with a towing and clamping device for clamping and towing the upper components, the towing and clamping device is engaged with the top translation device, and the end of the towing and clamping device is set There is a positioning adjustment device for adjusting the positioning. The terminal of the positioning adjustment device is provided with a luggage carrying device for carrying luggage. The present invention is small in size and installed in the luggage compartment. Assist in unloading luggage.

The invention relates to an upper limb negative pressure power assisting system. The upper limb negative pressure power assisting system comprises a back frame and arm rods provided with arm pads, andnegative pressure tension devices are arranged on the two sides of the back frame respectively; each negative pressure tension device comprises a shoulder angle plate, a compression spring, a supporting rod, a cylindrical barrel with an opening in the top, a piston located in the cylindrical barrel and a piston rod fixedly connected with the piston, the cylindrical barrels are fixedly connected with the supporting rods correspondingly, the shoulder angle plates are fixedly connected with the arm rods correspondingly, the joints of the shoulder angle plates and the arm rods are connected withthe tops of the supporting rods through a spherical hinge structure, and the bottoms of the supporting rods are connected with the back frame through the spherical hinge structure; a sliding groove isformed in each shoulder angle plate, the piston rods extend upwards from the pistons and extend out of the top openings of the cylindrical barrels correspondingly, pin columns capable of moving alongthe sliding grooves are arranged at the tops of the piston rods correspondingly, and a rodless cavity of each cylindrical barrel is sealed and is provided with a one-way valve. The system can reducedamage to human muscles and bones caused by long-time lifting of heavy objects or repeated actions, and the working efficiency is improved.

The invention discloses a laser device fixing device and a method for achieving temperature self-adaption through the laser device fixing device and relates to a laser cutting device and a cutting temperature control method. The laser device fixing device and the method for achieving temperature self-adaption through the laser device fixing device aim at solving the problem that due to the fact that the cutting temperature is not stable in the existing laser-assisted cutting process, the surface machining quality is seriously affected. The laser device fixing device comprises a base, a rotating mechanism, a stretching mechanism, an adjusting mechanism and a transmitting mechanism. The transmitting mechanism, the adjusting mechanism, the stretching mechanism and the rotating mechanism are sequentially arranged from front to back. The rotating mechanism is arranged on the base. The transmitting mechanism comprises a connecting end face, a fifth rotating motor, a second hydraulic cylinder, a laser transmitter, a plurality of rotating shafts and a plurality of infrared ray inductors. The method for achieving temperature self-adaption includes the steps of establishing a temperature database, monitoring temperature, feeding back information and adjusting current. The laser device fixing device and the method for achieving temperature self-adaption through the laser device fixing device are used for laser heating assisted cutting.

The invention relates to a pipe fixing device. The pipe fixing device comprises a fixing part, at least one group of moving parts and a middle shaft, the middle shaft is arranged on the fixing part, and the group of moving parts are jointly matched with the middle shaft and can do circular motion relative to the middle shaft so as to realize switching between a first position and a second position. All the moving parts move with the center shaft as the rotation center and are offset along the axis, so that all the moving parts can be independently clamped relative to the fixing part, clamping areas are formed between all the moving parts and the fixing part, independent clamping of pipes with the same diameter or pipes with different diameters can be achieved, the two adjacent moving parts do not interfere with each other due to the arrangement of the blocking parts, and the movement of the moving parts is flexible and convenient.

The invention discloses a high-altitude branch saw which solves the technical problem that an existing obstacle removing device of a network distribution line is poor in reliability. The high-altitude branch saw comprises a fixing frame; a roll shaft is arranged on the fixing frame; cutting teeth or / and scrapers or / and cutters are arranged on the peripheral face of the roll shaft; a hydraulic motor for driving the roll shaft is arranged on the fixing frame; the fixing frame is connected with a crane arm; the hydraulic motor is connected with a hydraulic pump; the hydraulic pump is arranged on a crane; and an oil tank and a hydraulic control system which are connected with the hydraulic pump and the hydraulic motor are arranged on the crane. The high-altitude branch saw is suitable for the high-altitude environment, and the hydraulic motor is adopted to drive an obstacle clearing mechanism in a hob form, so that the risk that a traditional chain saw is prone to being clamped can be effectively avoided, the obstacle clearing effect is good, and branches of different sizes can be smashed between the roller shaft and the fixing frame. The hydraulic motor is adopted to drive the roller shaft, so that a torque is large, and dead halt caused by clamping stagnation is avoided; and a hydraulic pipeline and a control circuit are hidden in the fixing frame, so that the safety performance is fully guaranteed.

The invention discloses a wire rod peeling treatment device and method. The device includes a driving mechanism, two heating mechanisms and a jig. The two heating mechanisms are arranged opposite to each other. One end of the heating mechanism is connected to the driving mechanism; it is arranged between the two heating mechanisms. The jig is configured to fix and convey the wire; the driving mechanism can drive at least one heating mechanism to move, so that the two heating mechanisms are close to or far away from each other. The device of the present invention makes the core wire of the earphone wire, especially the core wire of the Teflon sheath, peeled, so that the core wire of the earphone wire is more fully tinned, and the junction between the tinned and non-tinned is excessively good, It will not form accumulation, improve the welding quality and welding appearance of the core wire of the earphone wire and the welding plate, and improve the stability of the welding of the core wire and the welding plate.

The invention relates to a single-wheel electric vehicle, and belongs to the field of electricity. The single-wheel electric vehicle comprises a handle support bar. The handle support bar is fixed to a pedal chassis through a bearing; a roller is arranged on the pedal chassis; the bottom end of the handle support bar is connected with the roller; a handle is fixed to the handle support bar; the roller is connected with a motor via a transmission chain; the motor is connected with a battery; the motor and the battery are fixed to the pedal chassis.

The invention discloses an electric slab lying vehicle for automobile repairing. The electric slab lying vehicle comprises a device main frame, wherein a steering motor and a travelling motor are respectively arranged on one side and the back part of the device main frame; a steering shaft is arranged at the front part of the device main frame; the steering shaft is connected with a steering disc; the steering disc is matched with a steering main gear arranged on the steering motor through a transition gear; the travelling motor is matched with a travelling bevel gear; the travelling bevel gear meshes with a driven bevel gear arranged on a transmission shaft; the two ends of the transmission shaft are connected with rear wheel shafts arranged on rear wheel seats through couplings; rear wheels are mounted on the rear wheel shafts in an interpenetrating manner; and a steering controller and a travelling controller are further arranged at the upper part of the device main frame. According to the electric slab lying vehicle for automobile repairing, power is supplied through a storage battery, the entire device moves forwards, moves backwards, rotates leftwards and rotates rightwards through electric control, the motion is flexible and convenient, the operation is quite simple, strength of repair personnel is saved, and repair personnel are comfortable when using the vehicle.

The invention discloses a ground breaking device which comprises a base, crawler wheels are arranged on the two sides of the base, a positioning hole is formed in the central axis of the base, an air pick is arranged in the positioning hole in a penetrating mode, a positioning plate is arranged on the air pick in the circumferential direction, and a buffer spring abuts against the position between the positioning plate and the base. A positioning hole is formed in the base, treading grooves are formed in the positions, on the two sides of the positioning hole, of the base respectively and comprise a half sole groove and a heel groove, a pedal is arranged in the half sole groove in a sliding mode, a positioning flange is arranged on the pedal in the circumferential direction, a guide hole is formed in the positioning flange, and a guide column is arranged in the position, corresponding to the guide hole, of the base. The guide columns are in sliding fit with the corresponding guide holes, the guide columns are sleeved with reset springs, the reset springs abut against the position between the positioning flange and the base, a check ring is connected between the two pedals and surrounds the air pick, and the end, close to the ground, of the check ring is sharp. The structure is simple, the forcible entry efficiency is high, and the construction effect is effectively improved.