119results about How to "Avoid bending deformation" patented technology

The invention belongs to the technical field of swivel bridge detection, and particularly relates to a swivel bridge horizontal alignment detection device which comprises a mounting seat fixed to the upper end of an abutment, a controller is fixedly connected to the side wall of the mounting seat, and two guide boxes are symmetrically and fixedly connected to the upper side wall of the mounting seat. After the swivel bridge construction is completed, mechanical contact detection is arranged on the abutment, compared with a detection assembly arranged between two swivel bridges which are spaced by four meters, a fixed and accurate mounting reference can be provided for the detection device by means of a stable structural foundation of the abutment, and a detection structure does not need to be arranged between the bridges which are spaced by four meters; the problems of inconvenient operation, large assembly fixing difficulty and the like caused by cross-interval installation are avoided, the bending deformation of the detection rod due to the gravity of the detection rod can be effectively avoided, and the detection precision is guaranteed from the installation reference and the detection structure.

This utility model discloses a feeding device for PVC pipe production, comprising: an extruder body; a storage silo connected to the feed inlet of the extruder body; a feeding silo located on one side of the extruder body; a negative pressure pipe connecting the feeding silo and the storage silo, wherein a negative pressure fan is connected to the negative pressure pipe; and a weighing component located on the feeding silo for weighing materials. The advantages of this utility model are that it allows for the sequential weighing of different materials using the weighing component, resulting in accurate weighing data, avoiding uneven material proportions that could affect product quality, filtering materials to prevent clumping and impurities from entering, thus improving production quality, facilitating impurity removal, and increasing work efficiency.

The application provides an air outlet assembly and an air treatment device. The air outlet assembly comprises an air outlet frame having an air outlet, and a reinforcing piece which is separate from the air outlet frame, is located outside the air outlet, and is arranged on a long-side wall of the air outlet. The reinforcing piece is arranged to prevent the long-side wall from being bent and deformed. Thus, the long-side wall is less likely to be bent and deformed when heated, and the air outlet frame has better deformation resistance. In addition, the reinforcing piece is separate from the air outlet frame and is located outside the air outlet and arranged on the long-side wall of the air outlet. When hot air is discharged from the air outlet, the long-side wall separates the hot air and the reinforcing piece. Compared with the technical solution in which the reinforcing piece is arranged inside the air outlet, the temperature of the reinforcing piece is lower and the deformation amount of the reinforcing piece is smaller. Thus, the reinforcing piece has a better effect of preventing the long-side wall from being bent and deformed.

This utility model discloses an arc-starting plate for an AC contactor, relating to the field of arc-starting plate technology. It includes an arc-extinguishing cover and multiple grid-type arc-starting plates. A limiting strip is provided on the front side of the arc-extinguishing cover, with a limiting groove in the middle. L-shaped rods are fixedly connected to both ends of the limiting strip. Sliding grooves are provided on both side walls of the arc-extinguishing cover, with sliders slidably connected inside the grooves. A lifting plate is fixedly connected to one side wall of the slider. This utility model, by setting sliders and lifting plates that slide on the side walls of the arc-extinguishing cover, along with the limiting strip and limiting grooves, allows for the use of wastewater alcohol wiping pads to pass through the limiting grooves during cleaning to wipe the surface of the grid-type arc-starting plates. Because the wiping pads pass through the limiting grooves, the limiting strip restricts the wiping angle and position, preventing excessive wiping amplitude that could cause deformation and bending of the grid-type arc-starting plates. This controls the cleaning amplitude and angle, ensuring that the grid-type arc-starting plates are not deformed during cleaning.

The utility model provides a kind of auxiliary deviation rectification tool for processing air compressor pull rod belongs to air compressor accessory machining technical field. Including mounting seat, two supports are arranged at mounting seat interval, two installation barrels coaxial are respectively arranged on two supports, installation space for being used for pull rod to pass in is formed in two installation barrel inboard, a plurality of positioning columns are arranged at interval along the circumferential direction of installation barrel on installation barrel, and positioning column is radially slidably arranged along installation barrel, adjusting member for driving a plurality of positioning columns synchronous movement and abutting pull rod is equipped on installation barrel. The benefit of improving pull rod processing effect.

The application discloses a display module and a display device with the same. The display module comprises a display panel and a support structure which are stacked, the display panel comprises a bendable area and a non-bendable area, the bendable area is connected between two non-bendable areas, the bendable area is bent towards a side away from the support structure in a bent state of the display module, and the support structure comprises: a first support part which is arranged corresponding to the non-bendable area and has a first hardness; and a second support part which is arranged corresponding to at least the bendable area and has a second hardness smaller than the first hardness. The application solves the problem that the use of rigid materials to support the display panel in the prior art display module easily leads to poor stability and easy bending deformation.

The utility model relates to prefabricated building accessory technical field, concretely discloses a positioning tool of corrugated pipe in prefabricated hollow wall production, including two support seats, hollow rod is set up between two support seats and is provided with concentric through corrugated pipe setting, the periphery of hollow rod is uniformly provided with a plurality of expansion strips, and both ends of expansion strip are rotatably connected with the stay, the inside of hollow rod is provided with push block, the end of hollow rod is provided with the adjusting assembly that realizes the axial movement of push block, one of two stay of expansion strip is connected with hollow rod, and the other is connected with push block through the strip mouth on the outer wall of hollow rod, the utility model avoids the bending deformation of corrugated pipe in the subsequent grouting and vibrating process under the premise of guaranteeing the effective positioning of corrugated pipe, effectively guarantees the product quality of prefabricated hollow wall prepared.

This utility model discloses an anti-bending protection injection molding device for data cable connectors, belonging to the field of data cable connector injection molding technology. Key technical features include a support base, a lower mold bolted to the top of the support base, a positioning fixture inside the lower mold, a terminal inside the positioning fixture, and a cable on the side of the terminal away from the positioning fixture. An anti-bending mechanism is provided on the front side of the support base. By setting a clamping component, the clamping component provides stable constraint to the cable, preventing it from bending or shifting due to external forces, ensuring accurate relative positioning between the cable and the terminal. By setting a tensioning component, the tensioning component provides appropriate tension to the cable, further preventing bending deformation and straightening any slightly bent cable, ensuring it is in the ideal molding position, thus further improving the production quality and yield of the data cable connector.

This utility model provides a hinge connection structure, including a cabinet, a door, a first hinge, and a second hinge. The first hinge includes a main support plate, one end of which is fixedly connected to the cabinet, and the other end of which is rotatably connected to a wheel. The wheel is fixedly connected to the door. A cam is provided on the wheel, and the working surface of the cam has at least three concave surfaces, with a convex surface between adjacent concave surfaces. A roller is movably connected to the main support plate, and an elastic element is provided between the main support plate and the roller. The elastic element always tends to allow the roller to abut against the working surface of the cam and to stop at the concave surface. The second hinge includes a hinge plate and an eccentric wheel. One end of the hinge plate is fixedly connected to the cabinet, and the other end is connected to a hinge shaft. One end of the eccentric wheel is fixedly connected to the door, and the other end of the eccentric wheel is fitted with a matching bearing between it and the hinge shaft. Compared with the prior art, this utility model has the advantages of simple structure, high strength, and long service life.

This invention provides a hinge for embedded cabinet structures, comprising a main support plate, a rotating wheel, and a J-hook. The rotating wheel is rotatably connected to the main support plate and has a cam. The first end of the J-hook is fixed to the main support plate, and the second end of the J-hook is hook-shaped and engages with the cam. When the cam rotates relative to the main support plate at a first angle range, the J-hook undergoes elastic deformation and provides a circumferential driving force to the rotating wheel. When the cam rotates relative to the main support plate at a second angle range, the J-hook undergoes elastic deformation and provides static friction to the rotating wheel. Compared with existing technologies, this invention has the advantages of simple structure, high strength, and long service life. It effectively prevents the door from colliding with the wall, keeps the front of the door flush with the wall, minimizes the gap between the wall and the product, and has sufficient load-bearing capacity to effectively prevent the hinge from bending and deforming.

The utility model discloses a kind of support adjusting devices for large-diameter steel pipe girth weld, including first adjusting seat and the second adjusting seat of being located in the one side of first adjusting seat, it is movably connected between first adjusting seat and second adjusting seat by limiting rod, the other side of second adjusting seat is provided with second limiting seat, the side of first adjusting seat is provided with first limiting seat, second adjusting seat, second limiting seat, first adjusting seat and first limiting seat are all side by side arrangement between, second adjusting seat and second limiting seat and first adjusting seat and first limiting seat are all fixed by fixed rod butt joint, second adjusting seat, second limiting seat, first adjusting seat and first limiting seat upper portion are movably installed with the limiting portion for fixing large-diameter steel pipe;The utility model improves the girth weld precision of large-diameter steel pipe, and flexibly applies to different caliber large-diameter steel pipe.

The utility model relates to building construction equipment technical field discloses concrete trowelling device, including counterweight base, module support, retainer, drive mechanism, through slide hole, vertical lifting mechanism and board body. Adopt this structure, through drive mechanism drive module support and board body to and fro movement carries out concrete trowelling operation, greatly alleviated operator's labor intensity, improved work efficiency, board body, module support and so on spare adopt detachable connection design, can according to the length and width of room flexible adjustment device's work size, and when the spare damage is convenient to replace, reduce cost, strong adaptability, vertical lifting mechanism, the height of board body is accurately controlled, guarantees the consistency of concrete trowelling thickness, compared with artificial scraping, can make concrete surface more even, improves construction quality, and, when the device of the application carries out trowelling work, the workman can carry out operation in other room, and the overall operation efficiency is improved.

The application discloses a kind of multi-station synchronous grinding positioning device and method for camshaft machining, belong to camshaft machining field.A kind of multi-station synchronous grinding positioning device for camshaft machining, including base and camshaft body, the top of the base is equipped with support plate, the top of the support plate is provided with connecting rod, the surface of the connecting rod is equipped with connecting column, the surface of the connecting column is equipped with lug, the two sides of the lug are provided with sliding block;The application is installed lug on the surface of connecting column, and is matched with the clamping part between inner limit block, realizes the power transmission of camshaft body in circumferential direction of rotation, ensures that the rotary power of driving mechanism can be transmitted without loss, by the close meshing of the clamping tooth on the surface of sliding block and the limiting tooth in slot, the axial relative displacement between connecting column and fixed sleeve is limited, the automatic mechanical clamping and high-precision positioning of camshaft body end are completed.

The application discloses a kind of adjustable bending catheters, including tube body, first reinforcing layer, second reinforcing layer and traction mechanism;The distal end portion of tube body is adjustable bending section, the rest is main body section;First reinforcing layer is correspondingly arranged in adjustable bending section and extends along the axial direction, second reinforcing layer is correspondingly arranged in main body section and extends along the axial direction, and traction mechanism is used to control the bending of adjustable bending section;At least one hooking structure is provided on one of first reinforcing layer and second reinforcing layer, and the other has at least one hooking space matched with the hooking structure, the hooking structure enters the hooking space, to realize the relative limit of first reinforcing layer and second reinforcing layer in the axial direction.The application solves the problem that it is difficult to simultaneously satisfy the reduction of the influence on main body section and the reduction of the risk of tensile fracture during bending in the prior art, thereby improving the reliability of the adjustable bending catheter.

The present application relates to the technical field of machining tools, in particular to a numerical control machining tool for long shaft parts, comprising a tool main body, two sets of clamping assemblies, two sets of connecting assemblies, a driving assembly and two sets of pushing assemblies. At least one set of the connecting assemblies is arranged to slide along the axial direction. An elastic member one is arranged between the connecting assembly and the clamping assembly, and the elastic member one is stretched by moving the connecting assembly to apply an axial tension to the part. The pushing assembly is arranged in the clamping assembly and comprises a pushing member and a driving member one, and is used to abut against the end face of the part. The present application further comprises an auxiliary assembly and a limiting assembly. When the clamping assembly is released to avoid the end machining tool, the limiting assembly locks the position of the pushing member, and cooperates with the auxiliary assembly to assist the fixing of the part in the radial and axial directions. The axial stretching mechanism effectively compensates for the thermal deformation of the long shaft part and suppresses the machining vibration.

This utility model applies to the field of tablet PCs and provides an angle adjustment device for conference PCs. It includes a PC and an adjustment assembly mounted on the back of the PC. The adjustment assembly includes a fixed base, multiple connecting shafts, an adjustment shaft, and a mounting base. The fixed base, adjustment plate one, adjustment plate two, and adjustment plate three are movably hinged together via the multiple connecting shafts. The mounting base includes a fixed plate and a movable ball joint. The adjustment shaft includes clamping rod one, clamping rod two, and two fixed cylinders. The movable ball joint is movably engaged within clamping rod one and clamping rod two. The adjustment device, along with the conference PC, is mounted on a wall via the fixed base. The movably hinged adjustment plates one, two, and three, in conjunction with the adjustment shaft, allow for free adjustment of the PC's angle. Simultaneously, the movable ball joint, in conjunction with clamping rod one and clamping rod two, allows for free rotation and adjustment of the PC, and can adjust the PC's pitch angle within a certain range, giving the PC greater flexibility.

The utility model discloses an anti-corrosion protection tube which comprises a protection tube body. The protection pipe is composed of a straight pipe and a corrugated pipe, the two ends of the corrugated pipe are fixedly installed on one side of the straight pipe through bolts, a fixing buckle is installed on the upper side of the straight pipe, an installation frame is installed at the upper end of the fixing buckle, the installation frame is composed of a threaded cylinder and a threaded rod, and the upper end of the threaded rod is rotatably installed in the threaded cylinder. The bottom end of the threaded rod is installed at the upper end of the fixing buckle, the straight pipe is composed of a base pipe layer and a corrosion-resistant layer, and the corrosion-resistant layer is attached to the outer side of the base pipe layer. When the mounting rack is used, the threaded rod rotatably enters or rotatably extends out of the threaded cylinder, the length of the mounting rack can be adjusted, and the corrugated pipe is arranged to facilitate bending, so that a protection pipe can be conveniently bent according to the routing of a cable.

The utility model relates to the technical field of the cutting of the cord fabric, especially to an aviation tire cord fabric layer cutting device, which can avoid displacement and bending deformation of the cord fabric caused by cutting of the cutting knife, improve cutting precision, including base, two groups of riser, two side plates, feeding component, conveying component and cutting-off component, and the riser is installed on the left and right sides of the top of base, the side plate is installed between the left and right risers, the feeding component is installed on the left riser, the conveying component is installed between the front and back risers and the side plate, and the cutting-off component is installed between the two side plates.

The utility model relates to a COB (chip on board) light source and a camera lamp, which belongs to the technical field of light-emitting lamps and comprises a copper substrate and a plurality of light source parts, a light source bearing area is arranged on one side of the copper substrate, and the plurality of light source parts are connected onto the copper substrate and are all positioned in the light source bearing area. The light source part is provided with a second heat dissipation bonding pad facing the copper substrate, the second heat dissipation bonding pad is in contact with the copper substrate, a circuit layer is arranged between the copper substrate and the light source part, and an insulating high-conductivity layer is arranged between the circuit layer and the copper substrate. And meanwhile, the phenomena that the ceramic substrate is broken and the copper substrate is bent and deformed due to the difference of thermal expansion coefficients when the large-size ceramic substrate and the copper substrate are welded are avoided, the quality and the yield of the copper substrate product are improved, and the effect of high heat conduction efficiency is achieved.

The utility model discloses a shell assembly machining punching device which comprises a bottom plate, a T-shaped support is fixedly connected to the middle of the rear side of the bottom plate, an embedding seat is fixedly embedded in the top end of the rear side of the T-shaped support, a discharging hole is formed in the middle front side of the top of the embedding seat, a material collecting groove is formed in the center of the front side of the embedding seat, and a punching hole is formed in the middle of the embedding seat. A rectangular shell is arranged on the outer side of the front end of the embedding base in a front-back sliding fit mode, electric push rods are fixedly connected to the rear portions of the left side and the right side of the embedding base, push plates are fixedly connected to the output ends of the front sides of the electric push rods, and the front sides of the push plates are attached to the rectangular shell in an extrusion mode. The top face of the embedded base can be attached to and assist in supporting the stamping part of the rectangular shell, horizontal stability of the stamping periphery of the rectangular shell is kept, the sinking problem is avoided, meanwhile, the rectangular shell can be supported upwards, the compressive strength of the two sides of the rectangular shell is reduced, and the bending deformation problem is avoided.

The utility model discloses a high-precision low-flow-resistance stop valve, belongs to the technical field of valves, and provides the following technical scheme for solving the problem that the flow pressure adjusting precision is reduced due to vibration of a valve clack of a traditional stop valve: the valve clack is connected with a valve rod through a plurality of groups of supporting assemblies which are uniformly distributed in the circumferential direction, and an inner rod and an outer rod form an axial telescopic structure; and the turntable is in running fit with the valve rod through the L-shaped connecting ring. An annular communicating groove is formed in the top of the valve clack, an annular connecting groove is formed in the corresponding position of the bottom of the valve clack, the two grooves are communicated through communicating holes in an annular array, and a sealing ring capable of being embedded into the connecting groove is arranged in the corresponding position of the inner wall of the valve cavity. When the valve is opened, fluid can directly penetrate through the valve clack through the communicating hole to reduce impact force, the supporting assembly counteracts lateral acting force of the fluid on the valve clack through the axial bearing structure, and bending deformation of the valve rod is prevented. According to the valve, the fluid control precision and the operation stability are effectively improved while the sealing performance is kept by optimizing the fluid channel shape and the valve clack supporting structure.

This invention relates to the field of laser cutting technology and discloses a metal tube laser cutting device, including a guide rail, an auxiliary support device on one side of the guide rail, a metal tube placed on the auxiliary support device, a clamping and rotating drive mechanism, and a laser cutting mechanism. The laser cutting mechanism includes height-adjustable mounting seats located on both sides of the metal tube. A laser cutting head for cutting the sidewalls of the metal tube and a grinding head for grinding the ends of the metal tube are respectively mounted on opposite sides of the two mounting seats. This invention, by incorporating a laser cutting mechanism with grinding heads between two clamping and rotating drive mechanisms, allows the metal tube to undergo immediate end deburring via the grinding heads after laser cutting, eliminating the need for repeated clamping, effectively reducing process steps and improving production efficiency.

The invention relates to the technical field of house building engineering, in particular to a quick connecting and positioning device for prefabricated parts for house building engineering, which comprises a floor slab surface, pile foundations fixedly mounted at corners of the floor slab surface, embedded ribs fixedly mounted on the pile foundations, two groups of upright posts fixedly mounted on the floor slab surface, and fixed-length components arranged on side surfaces of the upright posts. The fixed-length assembly comprises a curved bar and a threaded sleeve, a threaded rod is connected into the threaded sleeve in a screwed mode through threads, and a positioning rod is arranged at the joint of the fork-shaped connector and the connecting lug. The threaded sleeve is rotated to drive the threaded rod to extend, so that the stand column is matched with the section size of the precast beam, and the edge of the precast beam is positioned through the positioning rod; the fork-shaped joints and the connecting lugs of the two groups of fixed-length assemblies are crossed and rotated to form right angles through the positioning rods, the precast beam is lowered to a proper height during hoisting, and a worker uses a tool to align the right-angle edge of the precast beam with the joints of the fixed-length assemblies and then falls down, so that the installation risk is reduced, and the positioning time is shortened.

The utility model relates to the technical field of manufacturing of axial flow compressor blades, in particular to a self-adaptive positioning tool for remanufacturing of axial flow compressor blades, which comprises a positioning table, a first positioning table, a second positioning table, a first positioning table and a second positioning table. The clamp table is arranged above the positioning table, an open hole is formed in the clamp table, and the center of the open hole is coaxial with the center of the second fixing piece and coaxial with the center of the first fixing piece; and the multiple clamp assemblies are arranged on the clamp table in the circumferential direction, each clamp assembly comprises at least one curvature clamping block, and the curvature of the curvature clamping blocks is matched with the curvature of the molded surface of the target axial flow compressor blade. The top end and the molded surface of the target axial flow compressor blade are fixed based on the positioning table and the multiple clamp assemblies on the clamp table, the tensile stress and the torsional stress borne by the axial flow compressor blade due to machining are effectively relieved, and low-stress clamping and self-adaptive positioning in the remanufacturing process are achieved.

The application provides a roll core pin mechanism, which comprises a separating pin assembly, a pushing pin assembly, a feeding assembly and a positioning assembly. The separating pin assembly comprises a bottom plate, a hopper is arranged on the bottom plate, a plurality of center pins are placed in the hopper, a jacking gap is arranged at the bottom of the hopper, an inclined surface is arranged on the inner wall of the hopper close to the jacking gap, a jacking plate is assembled in the jacking gap, the jacking plate can move in the vertical direction, the top end of the jacking plate is provided with a jacking surface which is arranged obliquely towards the inclined surface, the jacking surface and the inclined surface form a separating space, when the jacking plate moves upwards in the vertical direction, the separating space can gradually decrease to only accommodate one center pin, the top of the inclined surface is provided with a connecting surface, when the jacking plate moves upwards in the vertical direction to the limit position, the center pin in the separating space can move from the inclined surface to the connecting surface. The application can realize the rapid separating of the center pins in the multi-layer stacked material, has a simple structure and can effectively improve the production efficiency.

The utility model belongs to the field of material conveying, and relates to a steel sleeve steel straight pipe section for pneumatic conveying of high-temperature materials. The straight pipe section is composed of an outer pipe, an inner pipe, a sealing filler base, a sealing filler gland, a gland bolt, a small-head sealing filler, an inner and outer pipe connecting plate, an inner and outer pipe connecting bolt, an inner and outer pipe connecting pad, a large-head sealing filler, a sealing filler pre-tightening spring, a heat insulation layer and a flange sealing assembly. The inner pipe is a reducer pipe, an inlet large end is in bolted connection with the outer pipe, and an outlet small end can be inserted into a connected pipe section large end. And a heat insulation layer is filled between the inner and outer pipes to reduce heat loss. Double sealing of the sealing filler is achieved through the pre-tightening spring and the gland bolt, and gas is prevented from entering. The design effectively solves the problems of thermal expansion and sealing of the pipeline in pneumatic conveying of high-temperature materials, and the conveying efficiency and safety are improved.

The application provides an adsorption roller and a laminating machine. The adsorption roller comprises a main roller shaft, a negative pressure channel is arranged in the middle of the main roller shaft, and a negative pressure hole in communication with the negative pressure channel is arranged on the main roller shaft; a rotating roller is rotatably installed on the main roller shaft, and a plurality of rotating adsorption holes are arranged on the rotating roller. The rotating roller is rotatably installed on the main roller shaft, and a film belt can be transferred around the rotating roller. When the main roller shaft is connected with a negative pressure device of the laminating machine, negative pressure adsorption force is generated in the negative pressure channel, and the film belt is adsorbed through the negative pressure hole and the rotating adsorption hole. During the process of driving the film belt to move by a feeding roll and a receiving roll, the rotating adsorption holes on the rotating roller can provide adsorption power for the film belt, so that the film belt can be straightened, thereby effectively avoiding the bending deformation of the film belt in the stroke between the feeding roll and the receiving roll, and the flatness of the film belt is improved. The laminating machine adopting the adsorption roller can provide additional power for the transmission of the film belt, thereby improving the feeding quality and precision of the film belt.

The utility model discloses a steel structure rapid positioning device convenient to operate, and relates to the technical field of steel structure machining. The steel structure rapid positioning device convenient to operate comprises a steel structure machining table, a steel structure supporting assembly comprises a connecting plate, the interior of the connecting plate is fixedly connected with a first hydraulic rod, the output end of the first hydraulic rod is fixedly connected with a fixing frame, and the lower end of the fixing frame is fixedly connected with two second guide rods; a steel structure supporting roller shaft is rotationally connected to the inner side of the fixing frame, a plurality of first rolling wheels are rotationally connected to the surface of the steel structure supporting roller shaft, and through movement of the movable blocks and auxiliary supporting and guiding of the second rolling wheels in the moving process of the movable blocks and the connecting plates, the moving precision of the movable blocks is guaranteed; and the steel structure is supported through the multiple steel structure supporting roll shafts and the first rolling wheels, the weight of the steel structure is shared jointly, bending deformation caused by the dead weight of the steel structure is effectively avoided, and the stability of the steel structure in the machining process is guaranteed.

The invention relates to the technical field of umbrellas, in particular to an umbrella rib punching device for umbrella processing, which comprises a base and a processing table fixedly mounted on the top surface of the base, inward pushing cylinders are further arranged on the top surface of the base and positioned on two sides of the processing table, and pressing blocks are arranged at the ends, facing the processing table, of the inward pushing cylinders. A lifting frame is further arranged on the machining table, a downward pressing air cylinder is installed on the lifting frame, a stamping device is connected to the lower end of the downward pressing air cylinder, and the machining table comprises a containing plate fixedly arranged on the top face of the base and a containing groove integrally formed in the upper surface of the containing plate. A grinding structure with the bottom end penetrating through the bottom of the containing plate is arranged on the bottom face of the containing groove, and a plurality of umbrella rib supporting structures are symmetrically distributed in the positions, located on the two sides of the containing groove, in the containing plate.