47results about How to "Guaranteed clearance" patented technology

The utility model discloses an orthosis for preventing underarm scar contracture of a burn patient, which comprises a neck fixing strip, a shoulder lapping piece is fixedly arranged on the side of the bottom end of the neck fixing strip, one side of each first tensioning strip is rotatably connected with a first movable column, an underarm orthosis mechanism comprises an arc-shaped supporting piece, and the arc-shaped supporting piece is fixedly connected with the shoulder lapping piece. Adjusting long holes are formed in the two sides of the inner wall of the arc-shaped supporting piece correspondingly, and two limiting sliding blocks are slidably connected into each adjusting long hole. The armpit orthopedic mechanism is arranged between the first movable columns connected through the first tensioning strip, the limiting sliding block is connected with the arc-shaped filler strip, and the rubber stud is rotationally connected with the arc-shaped contact net piece, so that the orthopedic device is better in ventilation effect, dryness and ventilation of a burn position are guaranteed, recovery of an affected part is promoted, and it is guaranteed that a gap is formed between the arc-shaped supporting piece and the affected part; meanwhile, the arc-shaped supporting piece and the arc-shaped contact net piece generate pressure on the scar, so that the problem of scar contracture is solved while the ventilation effect is guaranteed.

The utility model discloses a kind of metal composite material walkway plates, comprising: footpath cantilever support, footpath cantilever support is spacedly arranged multiple along the length direction of prefabricated beam, the fixed end of multiple footpath cantilever support is fixedly connected with prefabricated beam;Steel grating frame, steel grating frame is multiple, the length direction of each steel grating frame Two ends are respectively overlapped and fixed on adjacent two footpath cantilever supports;Continuous no-alkali glass fiber felt reinforced polyurethane rigid foam plate, polyurethane rigid foam plate is multiple, and it is flatly fixed on multiple steel grating frames;Guardrail, guardrail is fixed on the cantilever end of footpath cantilever support.The footpath step plate is combined use by steel grating frame and polyurethane rigid foam plate, can greatly improve the durability of footpath step plate, and has the advantages of light weight, high strength.

The present invention relates to the technical field of micro-passage plate assembly processing, and discloses a micro-passage plate bending machine, the technical scheme of which mainly includes a frame body, a placing platform and a flat plate are arranged in the frame body, the flat plate is located above the platform, a power mechanism is arranged on the frame body to drive the flat plate to move up and down, a clamping mechanism for clamping the micro-passage plate assembly on the placing platform is arranged on the placing platform, when the micro-passage plate assembly is bent, the micro-passage plate assembly is first placed on two horizontal plates, and then the micro-passage plate assembly is clamped by the clamping mechanism, and the pre-bending mechanism pre-bends the flat tube by a roller, so that an angle exists between the flat tube and the plumb plane, ensuring that the flat tube can be bent smoothly without breaking, and canceling the setting of the core rod, and through the cooperation between the power mechanism and the rotating mechanism, the two horizontal plates are rotated to complete the bending of the micro-passage plate assembly, ensuring that there is a gap between each two adjacent flat tubes after bending.

The utility model relates to the technical field of drilling machines, and one embodiment of the utility model provides a drilling machine for rigging production, which comprises a drilling machine body, a cross-shaped sliding table, a support frame, a support block, a clamping plate, a clamping mechanism and a relative movement mechanism, the drilling machine body is provided with a working table, and the cross-shaped sliding table is arranged on the working table; a U-shaped supporting frame is fixedly arranged at the output end of the cross-shaped sliding table, supporting through grooves are formed in the two opposite inner walls of the supporting frame, the supporting blocks are arranged in the supporting through grooves in a sliding mode, clamping through grooves are formed in the close side walls of the supporting blocks, clamping grooves are formed in the bottoms of the clamping through grooves, and the clamping plates are arranged in the clamping grooves in a sliding mode. The clamping mechanism is arranged on the supporting block and used for driving the clamping plate to adjust the position, and through the technical scheme, the technical problem that in the prior art, abrasion is likely to happen between a drill bit and a workbench in the rigging drilling process of a drilling machine is solved.

The present invention discloses a rear shell assembly of a floor-standing air conditioner, a floor-standing air conditioner indoor unit and an air conditioner, wherein the rear shell assembly of the floor-standing air conditioner includes a shell, an air inlet grille and a filter assembly, and an air inlet is provided on the shell; the air inlet grille is installed at the air inlet of the shell, and a socket is formed between the periphery of the air inlet grille and the shell; the filter assembly includes a filter handle and a filter connected to the filter handle, and the filter assembly is plugged into the shell through the socket so that the filter corresponds to the air inlet grille. The filter handle is installed in the socket, and one side is fixed to the periphery of the air inlet grille, and the other side is fixed to the shell. The rear shell assembly of the floor-standing air conditioner of the present invention reduces the deformation of the air inlet grille through the correction of the filter handle, thereby reducing the gap between the air inlet grille and the filter handle, and greatly reduces the cost and improves the installation efficiency.

The invention discloses a heating mold and application of a hot forming process thereof.The mold comprises a workbench, a water cooling plate, a lower mold assembly and an upper mold assembly, the workbench is arranged on a machining equipment platform, the lower mold assembly is arranged on the machining equipment platform, and the upper mold assembly is arranged on the lower mold assembly; the water cooling plate is arranged on the upper die assembly, and the top of the water cooling plate is connected with a machining equipment sliding block. The die is suitable for common press equipment, complex transformation and addition of a water cooling system are not needed, the common press equipment and the hot forming die are isolated, and the equipment is prevented from being damaged by high temperature. The mold adopts the mica plate for heat preservation and heat insulation, rapid loss of temperature is avoided, the temperature stability of the mold can be guaranteed, and then the machining effect is guaranteed. Temperature field finite element analysis can be carried out according to ANSYS, repeated iteration adjustment is carried out, the temperature of a temperature control area is determined, and it is guaranteed that the temperature of all molded surfaces meets the process requirement.

The utility model discloses a screw compressor rotor seat and female and male rotor assembly tool which comprises an installation frame, a rotor seat fixing plate is fixedly installed at the position, close to the top end of the installation frame, of the installation frame, a plurality of installation holes used for installing a rotor seat are formed in the rotor seat fixing plate, and a cushion block is placed on the top of the bottom end of the installation frame. And a hydraulic rod for jacking the female rotor and the male rotor into the rotor seat is arranged at the top of the cushion block. According to the utility model, the installation rack is arranged to facilitate stable placement, so that the installation of the rotor seat is separated from the ground, and the rotor seat is installed on the installation hole of the rotor seat fixing plate, so that the displacement of the rotor seat in the installation process can be avoided, and the female rotor and the male rotor are respectively ejected into the rotor seat by adopting the hydraulic rod; therefore, the gap between the female rotor and the male rotor can be ensured, and the working effect of the compressor is ensured.

The utility model provides a headlamp mounting assembly and a vehicle, and relates to the technical field of vehicle parts, the headlamp mounting assembly comprises a headlamp, a front end module, an upper longitudinal beam and a fender; in the vertical direction of the automobile body, the front end module and the upper longitudinal beam support a first connecting part and a second connecting part of the headlamp respectively, and the fender and the front end module support a third connecting part and a fourth connecting part of the headlamp respectively. The orthographic projection of the gravity center of the headlamp on the plane perpendicular to the vertical direction is located in an area defined by the orthographic projection of the first connecting part, the orthographic projection of the second connecting part, the orthographic projection of the third connecting part and the orthographic projection of the fourth connecting part on the plane perpendicular to the vertical direction. In this way, the headlamp can be prevented from inclining forwards and sinking under the action of gravity, it is guaranteed that the gap between the headlamp and the peripheral part meets the DTS matching requirement, and then the assembly precision of the headlamp is improved.

The present application provides a dual dielectric barrier discharge pollutant degradation device, comprising: a first dielectric plate, the first dielectric plate is tilted, the first dielectric plate is provided with a first water-facing surface; a first groove, the first groove is arranged at intervals on the first water-facing surface; a second dielectric plate, the second dielectric plate is provided with a second water-facing surface, the second water-facing surface and the first water-facing surface are enclosed to form a closed processing space; a second groove, the second groove is arranged at intervals on the second water-facing surface, the first groove on the first water-facing surface and the second groove on the second water-facing surface are staggered; a first electrode, the first electrode is grounded, the first electrode is arranged on the side of the first dielectric plate away from the first water-facing surface; a second electrode, the second electrode is electrically connected to a power supply, and the second electrode is arranged on the side of the second dielectric plate away from the second water-facing surface. The present invention helps to treat wastewater and waste gas more efficiently and environmentally friendly, reduce environmental pollution, and promote sustainable development.

The utility model relates to the technical field of rolling mill equipment, in particular to a hydraulic balancing device for a working roll, which is characterized in that the top of a lower bearing box is provided with cylindrical grooves positioned on two sides of a lower working roll, the upper parts of the cylindrical grooves are provided with steps, and the top of the lower bearing box is provided with a clamping key groove I communicated with the cylindrical grooves; a balance hydraulic cylinder is inserted in the cylindrical groove and comprises a cylinder barrel, a piston rod and a first guide sleeve, the piston rod is arranged in the cylinder barrel in a sleeved mode, the upper end of the piston rod abuts against the bottom of the upper bearing box, and the first guide sleeve is fixedly arranged on the inner side wall of the cylinder barrel. A fixing block is fixedly arranged on the outer side wall of the upper end of the cylinder barrel, a second clamping key groove corresponding to the first clamping key groove is formed in the fixing block, and a clamping key is inserted into the first clamping key groove and the second clamping key groove. The gap between the upper working roll and the lower working roll can be kept, and the cylinder barrel of the hydraulic cylinder can be effectively prevented from rotating, so that a hydraulic pipeline is prevented from being twisted and bent.

The invention relates to the technical field of waste gas purification, in particular to an industrial waste gas washing spray tower which comprises a tower body, a circulating water tank, a water spray pipe, a gas pipe, a fan and a discharge pipe, a gas inlet is formed in the left side of the tower body, the industrial waste gas washing spray tower further comprises a base frame, a shaft rod, fan blades, a stripping assembly, a baffle, a filter membrane, an adjusting assembly and a scraper, and the base frame is connected to the inner wall of the tower body; the shaft rod is installed on the base frame, the fan blade array is connected to the outer surface of the shaft rod, the stripping assembly is connected to the outer side of the base frame, the baffle is connected to the lower end of the stripping assembly, the lower end of the filter membrane is connected with the periphery of the upper inclined face of the baffle, the adjusting assembly is connected to the lower side of the shaft rod, and the scraper is connected with the adjusting assembly. The sediment is generated on an elastic plane, and the sediment is separated from the plane by tightening the plane, so that the accumulation of the sediment is reduced, and the purpose of good sediment separation effect is achieved.

The utility model discloses a kind of T-shaped filter composite folding filter element, including filter element top cover and annular outer skeleton, the top of annular outer skeleton is connected with the bottom of filter element top cover, annular outer skeleton is concentrically arranged with filter element top cover, the surface of annular outer skeleton is evenly distributed with filter hole, the bottom of annular outer skeleton is provided with inclined filter surface, folding filter layer and braided metal inner skeleton are concentrically arranged in annular outer skeleton, the top of braided metal inner skeleton is welded with the bottom of filter element top cover, the bottom of braided metal inner skeleton is welded with inclined connecting ring. After being compressed in height direction by filter element top, braided metal inner skeleton can be deformed in height direction, and then reduce the error generated when installing contact between inclined connecting ring and baffle.

The utility model provides a front vehicle body side structure and a vehicle, the front vehicle body side structure comprises a mounting bracket for mounting a fender; the mounting bracket comprises two support arms and a top plate connected with the two support arms; each of the two support arms is provided with a vertically arranged first part and a transversely arranged second part, the first parts of the two support arms are oppositely arranged, the second parts of the two support arms are oppositely arranged, and the top plate is connected between the tops of the two first parts; a fender mounting point is arranged on the top plate, the mounting bracket is fixed in a vehicle body through the two second parts, and a first connecting structure for connecting the middle parts and / or the lower parts of the two first parts together is arranged between the edges of the two first parts. According to the front vehicle body side structure, the installation rigidity of the fender can be improved, the clearance surface difference between the fender and the side wall can be guaranteed, the deformation resistance of the fender can be improved, and therefore the quality of the whole vehicle can be improved.

The medium-frequency induction heating furnace comprises an operation base, an installation frame is fixedly installed on the top of the operation base, a heating furnace body is fixedly installed in the middle of the top of the operation base, and a guide bin is fixedly installed on the side wall of the heating furnace body. The guide bins are arranged in a bilateral symmetry mode relative to the vertical central axis of the heating furnace body, first guide rollers are fixedly installed at the lower ends of the side walls of the guide bins, second guide rollers are slidably connected to the front ends and the rear ends of the side walls of the guide bins, and third guide rollers are slidably connected to the upper ends of the side walls of the guide bins. According to the medium-frequency induction heating furnace capable of achieving uniform heating, overall heating of materials can be guaranteed through rotation, the situation of local overheating or supercooling is avoided, then the stability of the heating process is guaranteed, the heating time is shortened, stress concentration and deformation caused by too large temperature gradient are avoided, and then the heating efficiency is improved through position stability in the heating process and avoiding movement or inclination. The position accuracy of the material is ensured.

The utility model discloses a fireproof door frame split steel ladle sleeve inserting structure which comprises a door frame, a door pocket, a door frame tie bar, a door frame pull piece, a door pocket fixing pull piece, a clamping groove pressing piece, a clamping groove pressing piece fixing piece and an expansion bolt, the door pocket is connected with the door frame in an inserting mode, the door frame tie bar is provided with the door frame pull piece, and the clamping groove pressing piece fixing piece is connected with the door frame. The door pocket is fixedly connected with a wall surface through the door pocket fixing pull piece and the expansion bolt, the clamping groove pressing pieces are connected with the door frame through the clamping groove pressing piece fixing pieces, one end of the door pocket is inserted between the clamping groove pressing pieces and the door frame and tightly attached to the door frame and the clamping groove pressing pieces, and the clamping groove pressing pieces comprise the first clamping groove pressing piece and the second clamping groove pressing piece. According to the split steel ladle sleeve insertion structure of the fireproof door frame, an insertion mode is adopted, the insertion depth can be adjusted until the insertion is in place, the structure is simple, the installation process is simple, convenient and rapid, abutted seams are compact and attractive, and the installation effect is improved.

According to the one-way valve and the fluid control assembly, in the technical scheme of the one-way valve and the fluid control assembly, the size relation between the one-way valve and a runner plate conforms to L1 + L2-Hgt; therefore, after the first valve body abuts against the first mounting part and the second valve body abuts against the second mounting part, it can be guaranteed that a gap exists between two limiting faces at the joint of the first valve body and the second valve body, the possibility of extrusion stress between the first limiting face and the second limiting face is reduced, and then stress borne by the joint of the first valve body and the second valve body can be reduced.

A display module, a preparation method thereof, a display device and a mold. The display module comprises a display panel having a display side and a back side opposite to each other, the display panel comprising a display area, a bending area and a binding area, the bending area being connected with the display area and the binding area respectively, the bending area being bent into a curved surface towards the back side of the display panel, and the binding area being located on the back side of the display panel; the bending area is provided with a hole, one end of the hole being open on the display side of the display panel; a cover plate is covered on the display side of the display panel, the cover plate covering the display panel; a middle frame is surrounded on the periphery of the edge of the display panel and is in contact with the edge of the cover plate; a support fixing structure is located at least between the curved surface and the middle frame, and the support fixing structure covers at least part of the area on the outer side of the curved surface away from the display area of the display panel, and the support fixing structure covers one end of the hole.

The utility model relates to the technical field of building construction, and discloses a profiled steel sheet additional steel bar positioning structure which comprises a bottom groove formed in a profiled steel sheet, a plurality of sets of cushion blocks are arranged in the bottom groove, the cushion blocks are perpendicular to the extending direction of the bottom groove, and the length of the cushion blocks is matched with the width of the bottom groove. A positioning groove is formed in the top of the cushion block and used for containing an additional steel bar, and the direction of the positioning groove is consistent with the extending direction of the bottom groove. Binding grooves are formed in the cushion blocks, binding wires are arranged in the binding grooves in a penetrating mode and used for binding and fixing the additional steel bars to the cushion blocks, the positioning grooves can rapidly determine the positions in the placement process of the additional steel bars, the height of the cushion blocks effectively guarantees the interval between the additional steel bars and the profiled steel sheet, and the additional steel bars are prevented from being exposed after concrete is poured. After the additional steel bars are placed, the additional steel bars can be bound and fixed to the cushion block through the binding grooves in the cushion block, and therefore the technical problem that the additional steel bars of the profiled steel sheet are not easy to position is solved.

The present invention discloses an integrated prefabricated component for the leading edge of a wind turbine blade and a preparation method thereof, wherein the integrated prefabricated component for the leading edge of the blade comprises an integrated prefabricated pressure surface front edge UD main body section, a leading edge connecting plate main body section and a flanged flange section, wherein the flanged flange effectively prevents the leading edge prefabricated component from sliding downward due to gravity, thereby ensuring the structural accuracy of the blade production. Furthermore, the use of the integrated prefabricated component for the leading edge of the blade reduces the number of times of glue spraying during the production process of the wind turbine blade, thereby ensuring the stability of the structural performance of the leading edge of the wind turbine blade; the integrated prefabricated component for the leading edge of the blade can also reduce the step wrinkles at the splicing position of the leading edge connecting plate mold, thereby ensuring the gap between the leading edge connecting plate and the suction surface shell; in addition, during the production process of the wind turbine blade, the integrated prefabricated component for the leading edge of the blade can also reduce the number of layers of fiber cloth laid by workers, thereby improving the efficiency of shell laying and shortening the production cycle of the blade.

The invention relates to a motorized chain saw and a method for tensioning a saw chain of a motorized chain saw, in particular a motorized chain saw with a housing (2) and a drive motor (3). A guide rail (5) is held at the housing (2) via a releasable fastening device (8) and can be moved relative to the housing (2) in the direction of the longitudinal axis (6) of the guide rail via a tensioning device (10) when the fastening device (8) is released. The motorized chain saw (1) comprises a chain lifting device (11) which is constructed separately from the tensioning device (10). The chain lifting device (11) is configured for deflecting the saw chain (7) in a deflection position (40) of the chain lifting device (11) when the tensioning device (10) tensions the saw chain (7) and relaxing the saw chain (7) in an operating position (41) of the chain lifting device (11) when the guide rail (5) is fastened.

The invention relates to the technical field of automobile assembly, in particular to a large engine cover assembly assistive device and an assembly method. Comprising a first auxiliary tool which is provided with an engine cover supporting part and a Y-direction positioning part for positioning the first auxiliary tool, and the Y-direction positioning part can be positioned on a vehicle body framework; the second auxiliary tool comprises two engine cover rear end X-direction limiting components which are both provided with front door profiling blocks capable of being attached to a front door, and the front door profiling blocks are provided with engine cover and front door gap blocks; the third auxiliary tool comprises two engine cover rear end Y-direction limiting components, each engine cover rear end Y-direction limiting component is provided with a side wall profiling block capable of being attached to a side wall, and an engine cover and side wall gap block is arranged on each side wall profiling block; by arranging the large engine cover assembly assistive device, the assembly sequence of the engine cover and the fender can be adjusted during assembly, the engine cover is assembled firstly, then the fender is assembled, it is guaranteed that the engine cover is in clearance fit with the front door outer plate and the side wall outer plate through the clearance blocks in the closed state, and after the appearance clearance requirement is met, the engine cover and fender connecting nut is tightened.

A display panel is provided. The display panel includes an upper display substrate and a lower display substrate, the upper display substrate includes a first pixel region, a second pixel region, a third pixel region, and a light-shielding region surrounding the first pixel region, the second pixel region, and the third pixel region, the lower display substrate includes a light-emitting element. The upper display substrate includes a base substrate, a first bank overlapping the light-shielding region and arranged on the base substrate, a second bank overlapping the light-shielding region and arranged on the base substrate, a bridge bank arranged on the base substrate between the first bank and the second bank, and an organic material pattern having at least a portion thereof arranged on the bridge bank. The display panel has improved reliability.

The large-torque hydraulic brake for the coal mining machine comprises a shell, a rear cover, a spline housing, a single-rod piston cylinder and a brake assembly, a front cavity and a rear cavity of the single-rod piston cylinder are a rodless cavity and a rod cavity respectively, a spring is arranged in the rodless cavity, and the rod cavity is communicated with a control loop. A cylinder barrel of the piston cylinder, a shell and a rear cover are sequentially arranged from front to back and are coaxially and fixedly connected, a circular groove is formed in the extending end of a piston rod of the piston cylinder, and the front portion and the rear portion of the spline sleeve are arranged in the circular groove and a central through hole of the rear cover respectively. The brake assembly comprises a plurality of inner friction plates and outer friction plates which are alternately overlapped in the axial direction and partially or completely overlapped in the radial direction, the inner friction plates and the outer friction plates are circumferentially fixed to the outer side of the spline housing and the inner side of the shell correspondingly, and the piston rod and the rear cover axially limit the brake assembly from front to back correspondingly. Fins extending outwards are arranged in the middles of the outer cylindrical surfaces of the inner friction plates in the thickness direction, and wave-shaped spring pieces are arranged between the fins and the adjacent outer friction plates. The invention has the advantages of compact structure, less heat and long service life.

The utility model relates to the technical field of internal combustion engine oil pipe assembly, and discloses an oil pipe gap control tool which is used for controlling a gap between two adjacent metal oil pipes and comprises a gap block which can be fixed between the two metal oil pipes. The two metal oil pipes are spaced in the radial direction through the gap block; the two metal oil pipes are spaced in the radial direction through the gap block capable of being fixed between the two metal oil pipes, the distance is kept between the two adjacent metal oil pipes in the assembling process, and therefore the requirement of the adjacent metal oil pipes for the assembling gap is met.

This utility model discloses a packaging barrel and a material extraction device, relating to the field of chemical technology. The material extraction device includes an extraction pipe and a metal guide rod; one end of the extraction pipe has a connecting part; the extraction pipe passes through the barrel body via an extraction channel, and the connecting part is assembled and connected to a connecting seat; one end of the metal guide rod is hinged to the connecting part; the metal guide rod passes through the barrel body, and the end of the metal guide rod facing away from the connecting part abuts against the inner liner bag inside the barrel; When the material extraction device provided by this utility model is extracted from the packaging barrel, the metal guide rod can, on the one hand, provide support for the inner liner bag inside the packaging barrel, preventing the inner liner bag from sticking to the opening of the extraction pipe as the material decreases, ensuring extraction efficiency; on the other hand, the metal guide rod conducts communication between the material inside the barrel and other external components, effectively removing static electricity inside the barrel and ensuring safety during the extraction process.

An image projection device comprises: a light source (10); a control unit (50) that generates image light based on image data and controls the emission of image light from the light source; a scanning unit (12) mounted on a frame worn on a user's face and scanning the image light emitted from the light source in two dimensions; a light guide member (30) mounted on the frame and positioned in front of the user's eyes, formed of a glass material that allows image light emitted from the scanning unit at different times to pass through internally, having multiple reflective surfaces that reflect the image light, so that multiple image light reflected by the multiple reflective surfaces converge at a convergence point (62) in the user's eyes and illuminate the retina; a reflector (20) mounted on the frame, so that multiple image light emitted from the scanning unit converges at a convergence point (60) near the light guide member and is incident on the light guide member; and a lens (24) positioned at the convergence point (60), so that the image light is incident as diffused light onto the reflective surface of the last segment of the light guide member.

The utility model relates to a bottom spray gun for a converter, which comprises a spray pipe and a switching component, the spray pipe is used for extending into the converter, the tail of the spray pipe is connected with the switching component, the spray pipe comprises an outer pipe and an inner pipe sleeved in the outer pipe, and a gap between the inner pipe and the outer pipe forms a cooling gas channel. A cooling air inlet pipe is arranged on the switching assembly and communicated with the cooling air channel, and the tail of the inner pipe is used for being connected with a high-pressure oxygen source. According to the bottom spray gun for the converter, the spray pipe is buried in the refractory material and is burnt out along with consumption of the refractory material, natural gas or nitrogen passes through the gap between the inner pipe and the outer pipe to play a role in cooling the spray pipe, the spray pipe is prevented from being directly melted by the temperature of molten iron, and the service life of the bottom spray gun is prolonged.

The utility model relates to a kind of broken machine rotor body with variable rotary diameter, it is related to broken machine technical field, including rotating shaft and hammer head assembly being set in the rotating shaft around, and the hammer head assembly is connected between the rotating shaft by telescopic structure.This utility model can make broken machine according to the gap of the clearance of rotor body and broken machine crushing cavity to adjust broken material granularity, reach the substantial increase of broken machine production quantity.Meanwhile, due to the wear of hammer head, hammer head seat can be extended by oil cylinder at any time, the clearance of rotor body and broken machine crushing cavity can be automatically guaranteed, ensure that broken machine production quantity will not be reduced.Meanwhile, hammer head is replaced conveniently, maintenance time is short, and use and maintenance cost are low.