125 results about "Soft layer" patented technology

An environment-friendly polishing disc is manufactured by a processing technology that includes: preparing a table, drying oven, cutting tools, upper and lower molds, polishing powder, a batching barrel, and a polyurethane synthetic resin comprising HC8968 and HC8552; cutting a polyester-fiber upper backsheet and a lower backsheet to match the mold profile; batching the polishing powder with the polyurethane resin and uniformly mixing with a vibrator; pouring the mixture into the lower mold over the lower backsheet, scraping the surface, overlaying the upper backsheet, and clamping with the upper mold; sequentially drying the clamped assembly at about 45° C. for about 230 min, about 92° C. for about 230 min, and about 60° C. for about 450 min; and removing the molds to form the disc. An optional central notch may be provided. The process reduces external polishing consumables and supports uniform soft-layer formation.

The utility model discloses a noise reduction structure of a wall breaking machine, which comprises a main machine and a noise reduction device, a crushing space is formed in the wall breaking machine, and a handle part is fixed on the wall breaking machine; a cover body; a knife group; a soft layer used for reducing noise is arranged on the inner wall of the smashing space, and a sealing edge used for sealing and reducing noise is arranged on the cover body. According to the utility model, the soft layer is arranged on the inner wall of the crushing space in a secondary forming manner, and the sealing edge is sleeved on the cover body, so that noise generated by high-speed rotation of the knife group is blocked in the crushing space, an excellent noise reduction effect is provided, a sound-proof cover is prevented from being covered on the wall breaking machine, the operation is more convenient, and the noise reduction effect is better. Meanwhile, the noise reduction device is simple in structure, easy to implement, suitable for noise reduction treatment of various household appliances and wide in application prospect.

The utility model relates to the technical field of low-frequency sound insulation, in particular to a low-frequency sound insulation mortar structure which comprises bearing columns, first steel bar sets are fixedly installed in the bearing columns, a wall body mechanism is arranged between the bearing columns, a base mechanism is arranged at the bottom ends of the bearing columns, and the wall body mechanism comprises a brick body wall. The brick body wall is fixedly installed between the bearing columns, sound insulation mechanisms are arranged at the front end of the brick body wall, the heavy balls coated with the soft layers are placed in the base body formed by combining the whole sound insulation mechanisms to form the resonance unit with low frequency, and when the frequency of elastic waves propagated in the base body is close to the resonance frequency of the resonance unit, the sound insulation mechanism is arranged on the brick body wall. The resonance structure units and elastic waves generate a strong coupling effect, so that the elastic waves cannot be continuously propagated forwards, thereby causing the generation of band gaps, realizing the control of large wavelength by small size, and generating a sound insulation effect.

The invention provides a rotor surface treatment process, and relates to the technical field of surface treatment.The rotor surface treatment process is characterized in that a coating sequentially comprises a soft layer A, a hard layer B and a toughening layer C from a base body to the outside; the soft layer A is a metal lubricating composite layer formed by metal Mo or W and C or S with increasing content; the hard layer B is formed by metal nitride or carbonitride; a continuous component and structure gradient region is arranged between the soft layer A and the hard layer B; and the toughening layer C is a nanocrystalline-amorphous mixed structure formed by solid micro-diffusion of the hard layer B at 320-420 DEG C. Periodic micro-pits are formed in the surface of the toughening layer C and can be used for storing a lubricating medium. Through component gradient design and process hardening and tempering, the binding force, the wear resistance, the impact resistance and the stripping resistance of the coating are remarkably improved, the service life of the coating is prolonged, and the service life of the coating is prolonged. The method is suitable for high-load and high-friction working conditions such as vacuum pump rotors.

The utility model discloses a cutting device applied to a mattress gluing machine. The cutting device comprises a gluing machine body, a cutting device and a displacement mechanism, the mucilage glue machine body is used for bonding the mattress and bonding continuous interlayers above and below the mattress, and the mucilage glue machine body can bond continuous / discontinuous soft layers above and / or below the mattress; the cutting device is arranged at the gluing machine body and is used for cutting all interlayers and / or soft layers between two adjacent mattresses; the displacement mechanism is used for driving all the cutting devices to move in the longitudinal direction so as to cut all the interlayers and / or the soft layers at a time, the cutting device for longitudinal displacement cutting is arranged, so that the sections of the interlayers and / or the soft layers are neat, and the quality of finished products is improved; meanwhile, the distance between the two adjacent mattresses only needs to meet the requirement of the cutting device for cutting, so that the allowance of the interlayer and / or the soft layer needing to be reserved is effectively reduced, and the production cost is reduced.

The invention relates to a soft layer belt deformation modulus selection method, which comprises the following steps that soft layer belts are classified, measuring points are arranged, and it is ensured that each classified soft layer belt has a preset number of measuring points; carrying out a bearing plate test on the rock mass below the measuring point to obtain a deformation modulus value; carrying out a bearing plate test in a vertical layer belt direction on the test point of the soft layer belt to obtain a corresponding comprehensive deformation modulus value; measuring the thickness of the soft layer of the measuring point, and calculating to obtain the thickness of the rock mass under the measuring point participating in the testing; based on a common bearing principle, obtaining a deformation modulus calculation formula of the soft layer belt, and substituting a known quantity to obtain the deformation modulus of the soft layer belt; according to a deformation modulus calculation formula of the soft layer belt, calculating to obtain a stress deformation modulus value of the soft layer belt at the measuring point; and establishing a soft layer belt deformation modulus valuing principle, and determining a geological suggested value of the soft layer belt deformation modulus of the type according to the average value of the deformation moduli of the measuring points of the same type.

The invention discloses a sodium alginate hydrogel medical dressing and a preparation method thereof, and particularly relates to the technical field of medical dressings, the sodium alginate hydrogel medical dressing comprises a material body, a material layer is mounted at the bottom of the material body, and a plurality of material liquid parts are fixed at the bottom of the material layer; the connecting mechanism comprises a connecting layer, a first arc layer and a second arc layer, the connecting layer is fixed to one side of the material body, the first arc layer and the second arc layer are hinged to the two sides of the connecting layer, the first arc layer is matched with the second arc layer, and a soft layer is fixed to one side of the first arc layer; through the arrangement of the connecting mechanism, the wound of a patient can be rapidly covered with the material layer, the operation time in the dressing change process is shortened, the infection risk increased due to the fact that the wound of the patient is exposed on the surface for a long time is avoided, and meanwhile the problem that an existing device is prone to further stimulation on tissue around the wound in the adhesion process is solved; and the pain and discomfort of the patient are relieved, so that the efficiency of the device is greatly improved.

A blade includes a main body and an edge disposed around a periphery of the main body. A part of the edge includes a soft layer and an intermediate layer connected between the soft layer and the main body. The intermediate layer includes a soft component and a hard component stacked one on another when viewing in a cross-section along a width direction of the blade or along a length direction of the blade.

The invention relates to a surgical puncturing and access device (1000) for layers of semi-rigid or soft material, which allows a cannula to be placed by inserting a trocar, for the transfer of liquid or gaseous fluids in intracorporeal cavities or in lumens (300). The device comprises: an insertion unit (100) for inserting a trocar-cannula assembly (1), formed by an essentially cylindrical external tubular piece (2) that contains a puncturing unit (50) and a drive unit (60) in an interior channel (30) thereof, the proximal part of the external cylindrical tubular piece (2) being connected, during operation, to a base unit (200) by means of a quick connection, the trocar-cannula assembly (1) being disposed inside a guide channel (33) in the puncturing unit (50); and a base unit (200) formed by a flexible base piece (7) with a thin adhesive sheet (8) that attaches same to the contact surface.

The steel sheet has a TS of 1180 MPa or more and less than 1470 MPa, and has high YS, excellent ductility, excellent press formability of the inside and the ends of the steel sheet, and high crack propagation resistance. A base steel sheet has a predetermined component composition, the Vickers hardness of the base steel sheet is 84% or less with respect to a position 1 / 4 of the sheet thickness from the surface of the base steel sheet, the base steel sheet has a surface soft layer satisfying the following formula (1), the structure in the surface soft layer is within a specific range, and the structure in the position 1 / 4 of the sheet thickness of the base steel sheet is within a specific range. In a 90-degree V bending test having a bending radius of 0.5 mm, the length of a crack progressing in the ridge direction from the end of a bent ridge is 200 [mu] m or less, the El when subjected to a notch tensile test after being subjected to a heat treatment at 170 DEG C for 20 minutes is 6.0% or more, and the El when subjected to a notch tensile test after being subjected to a heat treatment at 170 DEG C for 20 minutes by introducing a 2% tensile nominal strain and then being subjected to a heat treatment at 170 DEG C is 5.0% or more. (1) 20 < = X < = 120-3800 * [Sb]-1900 * [Sn].

The invention belongs to the technical field of fabrics, and particularly relates to a high-breathability and high-density fine denier polyester filament yarn fabric which comprises a base layer, a moisture guiding layer is arranged on the outer surface of the base layer so as to guide moisture and discharge sweat, a fireproof layer is arranged on the outer surface of the moisture guiding layer so as to prevent flame from spreading, and a soft layer is arranged on the inner surface of the base layer so as to improve comfort. The base layer is formed by weaving high-density fine-denier polyester filaments, and a foam layer is arranged on the outer surfaces of the high-density fine-denier polyester filaments. The foam layer is prepared from the following raw materials: polyurethane, acrylate, sodium bicarbonate, ammonium carbonate and a preservative. By arranging the moisture conducting layer, the fireproof layer and the soft layer, the high-density fine-denier polyester filament yarn fabric has the effects of moisture conducting, perspiration, flame retardance and skin friendliness, and then the function of the high-density fine-denier polyester filament yarn fabric is improved.

The utility model provides an I-shaped cross section composite material box type structural member co-curing forming tool, which comprises a first tool, a second tool and two AIRPAD soft film tools, a rectangular bulge is arranged in the first tool to form a male die, the second tool is positioned above the rectangular bulge, a soft layer is arranged at one end of the second tool facing the rectangular bulge, and the two AIRPAD soft film tools are arranged on the second tool. The I-shaped composite material box-type structural part is arranged between the rectangular protrusion and the soft layer, the two AIRPAD soft film tools are attached to the outer surfaces of the two flanges of the I-shaped composite material box-type structural part respectively, and the problems that in the prior art, due to the fact that a traditional metal tool is complex in structure, large in manufacturing difficulty and high in manufacturing cost are solved. Due to the fact that a prefabricated material of an I-shaped frame or an I-shaped rib is pressed unevenly or cannot be effectively pressed through a traditional metal tool, layering and pores are formed in the I-shaped frame or the I-shaped rib, and the production cost of an enterprise is increased; and the nondestructive testing of the internal quality of the I-shaped frame or the I-shaped rib made of the composite material is not qualified.

A nacre-mimicking toughening structure and a preparation process therefor. The nacre-mimicking toughening structure comprises an upper-layer composite material (1), a lower-layer composite material (3), and an interlayer nacre-mimicking toughening structure (2) constructed from a low-dielectric sheet material and a resin matrix and located between layers of the upper-layer composite material (1) and the lower-layer composite material (3), wherein the interlayer nacre-mimicking toughening structure (2) has a high-performance soft layer / hard layer alternating nacre structure similar to that in natural shells.

Provided is a steel sheet having a TS of at least 980 MPa and less than 1,180 MPa and having high yield stress, excellent ductility, and excellent bending fracture resistance and fatigue characteristics. This steel sheet has: a predetermined component composition; a predetermined steel structure at a position corresponding to 1 / 4 of the sheet thickness; a soft surface layer having a thickness of 20-140 μm and a Vickers hardness that is at most 84% of the Vickers hardness at the position corresponding to 1 / 4 of the sheet thickness; a steel structure in which the area ratio of ferrite in the soft surface layer is 50.0-100.0%, the proportion of the number of ferrite grains having an area of at most 50 μm2 among ferrite grains of the soft surface layer is 0.01-0.99, and the proportion of the number of ferrite grains having a rolling-direction length / sheet-thickness direction length of greater than 1.00 among the ferrite grains is at least 0.55; and a tensile strength of at least 980 MPa and less than 1,180 MPa.

The application discloses a degradable zinc-based layered heterostructure composite material with alternately arranged work-hardened soft and hard layers and a preparation method and application thereof. A dispersion liquid containing magnesium powder is brushed on zinc plates, two zinc plates with magnesium powder coating are stacked, and single-pass cold rolling is performed on the zinc plates to obtain a cold-rolled plate; the cold-rolled plate is cut into two pieces from the middle, stacked, and then single-pass cold rolling is performed; the cutting, stacking and single-pass cold rolling are repeated to obtain a magnesium particle reinforced composite plate and a pure zinc plate stacked and then single-pass rolling is performed; the cutting, stacking and single-pass rolling are repeatedly performed; and finally, recrystallization annealing treatment is performed, so that the degradable zinc-based layered heterostructure composite material with alternately arranged work-hardened soft and hard layers is obtained. The heterostructure zinc-based material prepared by the application exhibits obvious work hardening capacity at room temperature, the strength of the heterostructure zinc-based material is improved by 400% compared to the strength of a pure zinc plate rolled in the same pass, and good room temperature plasticity is maintained, so that excellent comprehensive mechanical properties are exhibited.

The application discloses a discrete doll-in-doll type periodic vibration reduction and isolation pile and a laying method thereof, and comprises: a plurality of discrete doll-in-doll type vibration reduction and isolation single piles arranged according to a square lattice; each single pile structure comprises a local resonance concrete layer, a rubber soft layer and a steel pipe wrapping layer which are sequentially and multi-layered nested; the single pile as a whole presents a doll-in-doll type structure, and the cross section of each single pile is circular, and the rubber soft layer is arranged in a discrete type along the ring direction. The pile utilizes the band gap characteristics of the periodic structure to inhibit environmental vibrations with frequencies in the attenuation domain range, so as to reduce the adverse effects of environmental vibrations such as rail transit operation and earthquakes; the pile can break the limitation that the traditional periodic vibration reduction and isolation pile is not conducive to isolating low-frequency vibration waves in a limited site; the pile can make up for the defect that the traditional periodic vibration reduction and isolation pile can only isolate vibrations in a single frequency band, and realizes multi-frequency band vibration reduction and isolation application; the pile has strong geometric variability, can be targeted to attenuate environmental vibrations in different frequency bands, and has good durability and high operability.

The utility model relates to a sound-proof rubber and plastic plate with a moisture-proof and waterproof joint, which comprises a hard layer, a top soft layer and a bottom soft layer, the top soft layer and the bottom soft layer are respectively adhered and fixed above the hard layer and below the hard layer, a plurality of first sealing bulges are formed on the outer walls of two adjacent sides of the hard layer at intervals, and a plurality of second sealing bulges are formed on the outer walls of two adjacent sides of the hard layer. A plurality of second sealing protrusions are formed on the outer walls of the other two adjacent sides of the hard layer at intervals, and the first sealing protrusions and the second sealing protrusions are distributed in a staggered mode in the thickness direction of the hard layer. When the rubber and plastic plates are combined and spliced, a labyrinth type sealing structure can be formed between every two adjacent rubber and plastic plates by means of insertion connection of the first sealing protrusions and the second sealing protrusions in the two adjacent rubber and plastic plates, and infiltration of water at the joint of the two rubber and plastic plates is reduced; besides, through the arrangement of the honeycomb hole groups in the hard layer and the matching arrangement of the top soft layer and the bottom soft layer with the hard layer, the rubber and plastic plate can better improve the sound insulation effect.

The utility model relates to the technical field of screen protection films, and discloses an ultrathin folding screen integrated protection film without an interface adhesive layer, which comprises an interface adaptation layer, a dynamic buffer layer and a surface function layer which are sequentially connected, the surface function layer adopts an HC film, the dynamic buffer layer adopts a polyurethane optical elastomer, and the interface adaptation layer is made of an adhesive layer. And the dynamic buffer layer is integrated with the surface functional layer in a coating manner. According to the utility model, the dynamic buffer layer is integrated with the surface functional layer in a coating manner, so that an OCA (Optical Clear Adhesive) layer added between the HC film and the buffer layer of the traditional folding screen protective film is integrally reduced, one procedure can be reduced in the whole preparation process, the yield is improved, the overall thickness of the protective film is effectively reduced, and the production cost is reduced. The structure can be reduced to 65% of that of a traditional structure, the touch operation can be more sensitive, fingernail indentation residues caused by an OCA soft layer are eliminated, and the overall structure is more stable.

The utility model discloses a high-strength waterproof square-bottom valve bag in the technical field of square-bottom valve bags, which comprises a bag body, two clamping grooves are arranged on the bag body, a base is mounted on the bag surface of the bag body, a storage groove is arranged on the base, a protective soft layer is folded and stored in the storage groove, two soft plates are fixedly connected onto the protective soft layer, and the two soft plates are fixedly connected onto the bag body. The inner sides of the soft plates are fixedly connected with buckle plates, the buckle plates are movably connected in the clamping grooves and the storage grooves, a connecting belt is fixedly connected between the two soft plates, a plurality of connecting mechanisms are arranged on the buckle plates, and a plurality of self-locking mechanisms are arranged on the buckle plates, so that the waterproof performance is better when the equipment is used, the strength is higher when the equipment is used, and the service life of the equipment is effectively prolonged; and the practicability and the use convenience of the equipment are further improved.

The embodiment of the utility model provides a wearable part and wearable equipment. The wearable part comprises a first soft layer and a second soft layer, and the first soft layer and the second soft layer are arranged in a mutually attached mode. The interlayer is arranged between the first soft layer and the second soft layer; wherein the extension rate of the interlayer is smaller than the extension rate of the first soft layer and the extension rate of the second soft layer. According to the technical scheme provided by the embodiment of the invention, the balance between the hardness and the ductility of the wearable piece is realized, and the wearing comfort of a user is improved.

The invention relates to a staggered belt deformation test method, which comprises the following steps of classifying soft layer belts according to engineering characters, and arranging a preset number of test points in each type of soft layer belts; carrying out a rigid bearing plate test to obtain a test deformation curve; classifying the deformation curves, and establishing a deformation modulus calculation principle for different curve types; calculating a deformation modulus value based on the test deformation curve obtained by each test point; statistical analysis is carried out according to the soft layer belt character classification and the deformation modulus result, and the average deformation modulus corresponding to the soft layer belt type is obtained; according to the test method for the dislocation belt deformation test, the characters and the test curve of the soft layer belt are finely classified, and the obtained result is more reliable.

Provided is a technique for a steel sheet having a TS of 780 MPa or more and less than 1180 MPa, high YS, and excellent press formability of the inside and the ends of the steel sheet. A steel sheet in which a base steel sheet has a prescribed component composition and a Vickers hardness of 84% or less with respect to a position 1 / 4 of the sheet thickness from the surface of the base steel sheet, and which has a surface soft layer satisfying the following formula (1), the structure in the surface soft layer being within a specific range, and the structure in the position 1 / 4 of the sheet thickness of the base steel sheet being within a specific range, and a tensile strength of 780 MPa or more but less than 1180 MPa. 20 < = X < = 120-3800 * [Sb]-1900 * [Sn]... (1) (In formula (1), X is the thickness ([mu] m) of the soft surface layer, and [Sb] and [Sn] are respectively the contents (mass%) of Sb and Sn in the steel.

The utility model relates to the technical field of crystal labels, and provides a crystal label for shoes and garments, clothes and shoes, the crystal label for shoes and garments comprises a bottom plate layer, a soft layer and a coating layer coating the soft layer on the bottom plate layer, and the soft layer and the coating layer are made of transparent materials; and a pattern layer for three-dimensional mapping through a soft layer is arranged on the bottom plate layer. The pattern layer of the crystal mark is diverse in pattern, bright in color and capable of playing a good decoration role, the soft layer is arranged on the pattern layer and is the elastic protrusions with the cambered surfaces, the three-dimensional effect of the crystal mark can be improved, three-dimensional mapping can be conducted on the pattern layer, the pattern layer is made to have the three-dimensional effect, and the crystal mark is attractive in appearance, attractive in appearance and high in practicability. When the crystal mark is pressed, different visual effects are achieved when the pattern layer is observed from different angles, then the attractiveness of the crystal mark is effectively improved, the soft layer and the coating layer have good softness and elasticity, the crystal mark has good soft and elastic touch feeling when being pressed, and therefore the interestingness of use can be improved.

This application relates to the field of footwear technology and provides a protective children's shoe, including an upper and a sole. An anti-collision part is provided at the front of the sole, extending towards and connecting to the upper. The anti-collision part includes a soft layer, a protective layer, and a cushioning layer arranged sequentially from the inside out, with the protective layer having a higher hardness than the soft layer. This protective children's shoe aims to maintain good wearing comfort while effectively protecting the wearer's toes.

A watch strap and a watch. The watch strap comprises: a first soft layer (10) and a second soft layer (20), wherein the first soft layer (10) and the second soft layer (20) are fitted against each other; and an interlayer (30), which is arranged between the first soft layer (10) and the second soft layer (20), wherein the elongation rate of the interlayer (30) is less than the elongation rates of the first soft layer (10) and the second soft layer (20). Therefore, the watch strap achieves a balance between hardness and ductility, thereby improving the wearing comfort of users.

To provide a shearing force sensor capable of suppressing deformation in the compression direction and enhancing deformation in the shearing direction, and an inner force sensor sheet and an inner force sensor.SOLUTION: The shearing force sensor comprises a dielectric layer A composed of first to n-th soft layers (n≥2) and first to m-th hard layers (1≤m≤n-1, 1≤m≤n, or 1≤m≤n+1). The relationships Esoft,max<Ehard,min, εsoft,max<εhard,min, and tsoft,j>thard,admin are satisfied, where Esoft,max represents the maximum value of elastic modulus of the first to n-th soft layers, Ehard,min represents the minimum value of elastic modulus of the first to m-th hard layers, εsoft,max represents the maximum value of dielectric constant of the first to n-th soft layers, εhard,min represents the minimum value of dielectric constant of the first to m-th hard layers, tsoft,j represents the thickness of the j-th soft layer (1≤j≤n), and thard,admin represents the minimum value of thickness of the k-th hard layer adjacent to the j-th soft layer.SELECTED DRAWING: Figure 1

The utility model discloses a rabbit cage device, and relates to the technical field of photographic equipment, the rabbit cage device comprises a cage frame, an assembling mechanism and a switching mechanism, the assembling mechanism is arranged on the cage frame, and the switching mechanism and the assembling mechanism are detachably assembled; the rabbit cage device further comprises at least one soft layer, and the at least one soft layer is arranged on the assembling mechanism and / or the switching mechanism. When the assembling mechanism and the switching mechanism are assembled, the soft layer is located between the switching mechanism and the cage frame. According to the technical scheme, the assembly accuracy and the assembly stability of the rabbit cage device can be improved.

The utility model discloses an outdoor air mattress of sleeping comfortable, it includes upper cover layer, buffer soft layer, intermediate film layer and lower interface layer from top to bottom in proper order, and the edge of upper cover layer, the edge of intermediate film layer and the edge of lower interface layer form the connecting ring edge after high -frequency heat -sealing, buffer soft layer fixedly connected on the lower surface of upper cover layer, and be located in the inside of air mattress, be equipped with airtight inflation chamber between intermediate film layer and lower interface layer, be equipped with at least one inflation position on lower interface layer, be equipped with a plurality of drawstring subassembly between intermediate film layer and lower interface layer, the utility model is equivalent to additionally set up upper cover layer, buffer soft layer and heat preservation aluminum film on the top of existing inflation chamber, and upper cover layer is used for directly and human body contact, and buffer soft layer can effectively increase the sleeping comfortable feeling of user, and heat preservation aluminum film can effectively promote the heat preservation effect of air mattress, in the process of camping outdoors, user lies on the air mattress, is comfortable and warm, is very comfortable, and the practicality is strong.

A watchband and a watch. The watchband comprises a first soft layer (10) and a second soft layer (20), the first soft layer (10) and the second soft layer (20) are arranged in mutual adhesion; a sandwich layer (30) is arranged between the first soft layer (10) and the second soft layer (20); wherein the elongation of the sandwich layer (30) is less than the elongation of the first soft layer (10) and the second soft layer (20), so that the watchband realizes balance between softness and ductility, and improves the wearing comfort of the user.

The utility model discloses a gearbox sound insulation package belongs to the industry, including protection mechanism, and protection mechanism includes gearbox protection shell, and the inside of gearbox protection shell is provided with the acupuncture cotton for the purpose of shock attenuation, and the inner core of acupuncture cotton is filled with the configuration cavity groove for assembling, and the edge of configuration cavity groove is provided with the hard layer of cladding for the purpose of toughening, and the middle part of gearbox protection shell is provided with the cavity groove for wrapping up the main structure of gearbox, and the slot position of cavity groove is sequentially arranged and is provided with soft layer, intermediate layer and hard layer, and three layers of different purpose hierarchical structure are pressed to make, and the position of soft layer is PU foamed material, and the position of hard layer is EVA or acupuncture cotton, and the position of intermediate layer is PAPE film, and through the acupuncture cotton and the configuration cavity groove of built -in better first show gearbox package cladding, can also avoid receiving external impact while increasing the effect of protection to gearbox, and can effectively form a protection space with gearbox outside and realize protection in the position of cavity groove and adjusting cavity groove and configuration cavity groove.