1118results about "Braking discs" patented technology

The invention relates to a preparation method of a carbon fiber reinforced metal matrix composite brake disc, and belongs to the technical field of brake disc preparation. Immersing the carbon fiber in an ethanol solution containing a silane coupling agent, and drying; the aluminum-based alloy powder, the copper-based alloy powder and the silicon carbide particles are put into a planetary ball mill to be subjected to ball milling, and metal matrix mixed powder is obtained; the pretreated carbon fibers are woven into a three-dimensional woven prefabricated body, then pores of the prefabricated body are evenly filled with metal matrix mixed powder, cold press molding is conducted, and a composite material prefabricated body is obtained; putting the composite material prefabricated body into a vacuum hot-pressing sintering furnace, and sintering to form a carbon fiber reinforced metal matrix composite material brake disc blank; after solution treatment, adding a rare earth coordination type enhancer and carrying out aging treatment; the carbon fiber reinforced metal matrix composite brake disc prepared by the method has excellent wear resistance and mechanical properties, and can meet the use requirements of modern high-performance vehicles on brake discs.

The invention belongs to the technical field of brake discs, and relates to a cast iron brake disc ceramic reinforced iron-based wear-resistant coating and a preparation method thereof.The cast iron brake disc ceramic reinforced iron-based wear-resistant coating comprises a brake disc base body, an iron-based transition coating and a composite wear-resistant coating, the composite wear-resistant coating is formed by mixing iron-based alloy powder, B4C ceramic particles and CeO2 rare earth powder; the preparation method comprises the following steps: 1, carrying out laser cladding on iron-based alloy powder on a brake disc substrate to prepare an iron-based transition coating; 2, carrying out ball milling and mixing according to a weight ratio to prepare composite wear-resistant mixed powder; 3, performing laser cladding on the iron-based transition coating with composite wear-resistant mixed powder; the B4C + CeO2 ceramic particles are mixed into the iron-based alloy powder, so that microcracks of the brake disc coating are reduced, the wear resistance and hardness are improved, dust pollution is reduced, the service life is prolonged, and the friction performance better meets the brake disc strengthening requirement.

The utility model provides a brake disc which comprises a friction ring, a first connecting piece and a second connecting piece. A second connecting piece is annularly arranged on the outer ring of the disc cap, the first connecting piece and the second connecting piece are fixedly connected in the axial direction of the brake disc, the second connecting piece is provided with a plurality of interval parts and a plurality of abutting parts, the interval parts and the abutting parts are annularly arranged at intervals in the circumferential direction of the disc cap, and the abutting parts abut against the first connecting piece; the interval part is located on the side, facing the first connecting piece, of the second connecting piece, the first connecting piece and the second connecting piece form an interval in the axial direction of the brake disc through the interval part, and the second connecting piece can deform through the interval part. By means of the technical scheme, the problem that in the prior art, a split type brake disc is poor in thermal deformation performance can be solved.

The present disclosure relates to a brake calliper for a disc brake. The brake calliper comprises a supporting structure, a cover with a pin, and a fixing disc. The supporting structure has a bridge and at least one bridge finger which has a brake lining side, an outer side and a bore which is incorporated into the outer side and which runs from the outer side in the direction of the brake lining side. The cover has a pin protruding into the bore. The fixing disc has a disc edge which has an outer diameter D and which is positively held in the bore and with a disc center which has a through-opening, through which the pin protrudes. The disc center has a clamping region which is bulged relative to the disc edge in the direction of the brake lining side and which fixedly clamps the pin in the through-opening by a clamping edge. The disclosure also relates to such a fixing disc itself.

The present invention relates to the field of carbon-carbon composite materials, and discloses a carbon-carbon composite material, a carbon-ceramic composite material, an anti-oxidation coating, and an aircraft brake disc. The anti-oxidation coating comprises components by weight: 150 parts of an aqueous solution of aluminum dihydrogen phosphate with a content of 37-43%, 70-130 parts of tin powder, 60-120 parts of silicon carbide powder, 15-60 parts of glass powder with a softening point of 600°C-900°C, 15-50 parts of kaolin, and 10-30 parts of boron carbide powder. The anti-oxidation coating can form a coating with good thermal stability and chemical stability by accurately proportioning and mixing a plurality of materials, and can protect the carbon-carbon composite material from oxidation under a high temperature environment.

The invention provides a floating type brake disc which comprises a brake ring which is an annular piece capable of rotating around a central rotation axis, and the central rotation axis defines the axial direction, the radial direction and the circumferential direction of the floating type brake disc. A disc cap configured to have a cap portion extending substantially in a radial direction and a skirt portion defining an annular outer circumferential surface of the disc cap extending in a circumferential direction, the disc cap being detachably attached to an annular inner ring of the brake ring extending in the circumferential direction via the annular outer circumferential surface, the brake ring can move between an attaching position and a separating position relative to one side of the brake ring in the axial direction; and an annular elastic biasing member, the elastic biasing member being arranged in such a way that when the disc cap is in the attached position, the elastic biasing member is arranged between the disc cap and the brake ring in the circumferential direction and exerts a biasing force on the brake ring in the axial direction against the disc cap.

The invention discloses an electromagnetic disc brake with a gap automatic compensation function, and relates to the technical field of electromagnetic disc brakes, the electromagnetic disc brake comprises a mounting base and a connecting shell, one side of the mounting base is provided with a shell, an electromagnet is mounted in the mounting base, one side of the electromagnet is provided with an armature, and the armature is connected with the shell. One side of the armature is connected with multiple sets of reset springs, and one end of each reset spring is fixed to the inner side of the shell. According to the electromagnetic disc brake with the gap automatic compensation function, the gap between the armature and the electromagnet can be detected through the microswitch, and when the gap exceeds the range, the thin hydraulic cylinder can be started to drive the hydraulic plunger head to push the armature to move, so that the gap between the armature and the electromagnet returns to normal, and compensation is completed; the sealing mechanism can prevent external dust from making contact with the armature and other components, so that the braking effect is kept, and the heat dissipation mechanism can dissipate heat of the braked components.

The utility model relates to the technical field of brakes, and provides an electromagnetic brake convenient to adjust an air gap, which comprises a stator, an armature and a brake disc which are sequentially arranged in the axial direction, and further comprises a dustproof flange cover, the dustproof flange cover is arranged outside the stator in a matched mode, and the brake disc is arranged between the dustproof flange cover and the armature; an air gap measuring hole is formed in the side of the dustproof flange cover, and a locking screw used for abutting against the stator is screwed into the side of the dustproof flange cover. According to the utility model, the air gap can be adjusted more quickly and conveniently, and the operation is simple.

The invention relates to the technical field of brake discs, in particular to a carbon-ceramic brake disc with a composite functional layer and a preparation method of the carbon-ceramic brake disc. The problems that a brake disc is insufficient in strength and poor in ablation resistance are solved. The preparation method comprises the following steps: carrying out low-temperature plasma treatment and silicon dioxide sol impregnation on carbon fibers, and inserting a graphene oxide film between woven layers, so as to obtain a carbon fiber preform; primary densification is carried out through pretreatment activation, low-temperature permeation and high-temperature permeation, and two graphitization treatments are combined; siliconizing is carried out through low-pressure permeation, high-pressure strengthening and laser cladding, and secondary densification is carried out through precursor impregnation and cracking; the titanium zirconium silicide-nano aluminum oxide composite layer generated through the embedding process forms a compact oxidation film at high temperature, and the silicon carbide nano crystal whiskers are subjected to chemical vapor deposition, so that the strength and ablation resistance of the prepared carbon ceramic brake disc are improved.

The invention discloses a carbon-ceramic brake disc of a gradient composite structure, the carbon-ceramic brake disc is composed of a porous carbon-ceramic matrix and a gradient composite coating arranged on the surface of the porous carbon-ceramic matrix, the gradient composite coating is composed of a transition layer and a surface layer, the transition layer is a gradient Cf / SiC layer, and the surface layer is a gradient Cf / SiC layer. The carbon-ceramic brake disc comprises a carbon-ceramic base body, a transition layer and a surface layer, the transition layer is arranged on the surface of the carbon-ceramic base body, the volume fraction of carbon fibers in the transition layer is progressively decreased in a gradient mode from inside to outside, the volume fraction of SiC is progressively increased in a gradient mode from inside to outside, and the surface layer is a SiC / ZrB2 composite layer. The gradient composite coating is arranged on the surface of the carbon-ceramic base body, and the volume fraction of the carbon fibers in the inner layer is progressively decreased in a gradient mode from inside to outside; therefore, the difference of interlayer thermal expansion coefficients is greatly reduced, the cracking risk of the surface layer and the matrix is reduced, the surface layer has ultrahigh-temperature protection capability, the interface thermal stress of the carbon-ceramic brake disc provided by the invention is reduced by 62%, and the ultrahigh-temperature service life is prolonged by more than 3 times.

The invention provides a high-speed laser cladding metal ceramic coating, a cast iron brake disc and a preparation method and application of the cast iron brake disc. The high-speed laser cladding metal ceramic coating comprises the following preparation raw materials in percentage by mass: 40%-60% of stainless steel, 10%-20% of SiC, 10%-30% of ZrO2, 5%-10% of Ti and 1%-2% of CeO2. According to the coating, the hardness, the wear resistance, the friction coefficient and the toughness of a cast iron matrix can be remarkably improved, and the braking requirement of a motor vehicle under the extreme working condition can be well met. The invention further provides the cast iron brake disc and a preparation method and application thereof.

The invention relates to a brake module (100) for a vehicle flap drive system with at least one first friction partner (130) and at least one second friction partner (160, 170), wherein the friction partners (130, 160, 170) each have at least one friction surface (140, 150, 180, 190) which rub against one another during braking operation, wherein the first friction partner (130) is formed in one piece from a plastic with a carbon fiber content.The invention further relates to a vehicle flap drive system comprising a brake module (100).

The invention provides a die-casting forming method for a graphene reinforced aluminum matrix composite brake disc, and belongs to the field of brake disc preparation. The method comprises the following steps: carrying out surface modification treatment on graphene; mixing the modified graphene with the aluminum alloy melt; the brake disc is formed through a die-casting process; and the formed part is subjected to heat treatment to optimize the organization structure of the formed part. The brake disc prepared by the method has excellent thermophysical properties and mechanical properties, and is suitable for a high-performance automobile brake system.

The brake assembly includes a housing, a rotor disc. The rotor disc includes at least one internal cavity. The at least one internal cavity includes a pawl and a thermal fuse. In use, the thermal fuse is configured to maintain the position of the pawl in the at least one internal cavity when a temperature is below a predetermined threshold, and wherein the thermal fuse is configured to melt when a predetermined threshold of temperature is reached during braking to release the pawl out of the at least one internal cavity towards the housing. The housing includes at least one recess configured to receive the pawl.

In a method for producing a coated workpiece, a coating is applied to at least one surface (115) of the workpiece (110) using laser radiation. For this purpose, a first laser beam directed onto the surface is generated by guiding laser radiation emitted by a laser source through beam-shaping optics of a laser processing head onto a first impact zone on the surface. A preferably powdered filler material is fed to the first laser beam in such a way that the filler material is heated and / or at least partially melted in an interaction zone by laser radiation of the first laser beam and bonds with the heated material on the surface in the region of the first impact zone (225-1).A relative movement is generated between the workpiece (110) and the laser processing head such that the first impact zone moves in a feed direction at a feed rate along a feed path, leaving a track (228) of coating material behind it. Furthermore, at least one second laser beam directed onto the surface is generated for post-treating the coating material. Laser radiation emitted by a laser source is guided by focusing optics of the beam-shaping optics of the laser processing head onto a second impact zone (225-2) lagging behind the first impact zone in the feed direction, and acts on the track of coating material.

A brake disc for a disc brake may have a braking band made of gray cast iron or steel, provided with two opposite braking surfaces, each of which defines at least partially one of the two main faces of the disc. The disc is provided with a base layer constituted by steel having a nickel content of at most 15% which covers at least one of the two braking surfaces of the braking band.

The invention discloses an automobile brake disc which comprises a disc body and a gooseneck protruding outwards from one side of the disc body, an annular groove is formed in the connecting position of the gooseneck and the disc body, the automobile brake disc further comprises an annular fin radiator arranged in the groove and a clamping spring arranged on one side of the annular fin radiator, and the annular fin radiator comprises a supporting seat and a plurality of layers of radiating fins which are arranged on the supporting seat and are concentrically distributed at intervals by taking the rotating axis of the disc body as the center. According to the automobile brake disc, the annular fin radiator is fixed in the groove formed in the connecting position of the gooseneck and the disc body through the clamping spring, heat generated by braking is guided out through the radiator by the disc body, and the situation that excessive heat is transmitted to a hub unit through the gooseneck, and the strength of a hub and the service life of peripheral plastic parts are affected is avoided.

The invention relates to the technical field of brake disc production, in particular to a high-toughness alloy brake disc and a preparation method thereof. The high-toughness alloy brake disc comprises the following chemical components in percentage by mass: 0.3 to 1.0 percent of niobium; 0.05 to 0.25 percent of antimony; 0.5 to 1.5 percent of molybdenum; 0.5 to 1.5 percent of copper; 0.1 to 0.4 percent of tin; 0.05 to 0.2 percent of titanium; boron: 0.002 to 0.008%; 0.05 to 0.1 percent of lanthanum; 0.03 to 0.08% of neodymium; 0.03 to 0.15% of cerium; and the balance is a gray iron matrix. Through niobium-antimony-molybdenum-boron composite microalloying, triple inoculation and graded annealing processes and in combination with PEO coating and laser microstructure surface treatment, high impact resistance, salt spray corrosion resistance and excellent thermal conductivity in the environment of-40 DEG C to 600 DEG C are achieved.

The invention concerns a disc (40) for a disc brake (30).According to the invention, the disc (40) is made of steel containing less than 0.3% by weight of Carbon.

An aluminum-based composite material and a brake disc made of the composite material are provided. The material includes a base material and a reinforcing phase. The base material includes the following components in mass percentage: 4.0-7.0% of Cu, 0.4-1.2% of Mg, and 0.1-0.8% of Ag, with the balance being Al. The reinforcing phase can be SiC particles having a volume percentage of 10-40%.

The invention relates to the technical field of brake pads, in particular to a brake pad adaptive to a carbon-ceramic brake disc and a preparation process thereof.The brake pad comprises, by weight, 25%-57% of reinforced fibers, 22%-49% of a lubricant, 7%-17% of a binder, 7.2%-28.1% of a friction modifier and 3%-23% of filler; the reinforced fiber is at least one of nano silicon nitride modified ceramic fiber, carbon fiber and aramid fiber. Through cooperation of the components, the prepared brake pad has the advantages of being good in heat conduction, resistant to shearing and abrasion, good in toughness, capable of reducing noise, stable in friction coefficient, reliable at low temperature, high in high-temperature braking force, stable in braking and the like.

The utility model discloses a wind power generation brake disc assembly which comprises a brake caliper shell and a brake disc, adjustable installation pieces are symmetrically distributed between the left inner wall and the right inner wall of the brake caliper shell, friction pieces are symmetrically distributed on the opposite inner side faces of the two installation pieces, and the brake disc is located between the transversely adjacent friction pieces. The device further comprises an auxiliary braking mechanism. The auxiliary braking mechanism comprises hydraulic rods, hemispherical heads and hollow hemispherical protrusions, the hydraulic rods are symmetrically distributed and installed on the opposite inner side faces of the two installation pieces, the hydraulic rods are located between the two friction pieces which are adjacent up and down, and according to the wind power generation brake disc assembly, the hemispherical heads make contact with the spherical surfaces of the protrusions, braking force is transmitted through shearing force, and the braking force is transmitted through the hollow hemispherical protrusions. And mechanical meshing and friction dual braking is formed, on the basis of friction plate braking, additional braking force is provided, the braking force of the braking assembly on the braking disc is increased, and the braking time of the wind driven generator is effectively shortened.

A brake body according to the present disclosure has a coating layer which contains an iron-based amorphous alloy and is formed on a contact surface at which a friction means rubs against the brake body to generate braking force which the brake body is rotated. The coating layer has a low friction coefficient and thus generates less dust during braking. The coating layer also has high corrosion resistance and wear resistance and may thus guarantee high performance and good price competitiveness when applied to a brake base material produced at low cost.

The invention provides a production method of a high-strength brake disc with a double-layer composite structure, and belongs to the technical field of friction materials. The brake disc comprises an inner-layer metal matrix and an outer-layer ceramic composite material, and tight combination of the two layers of materials is achieved through a hot pressing sintering process. The structure has the high strength of metal and the high wear resistance of ceramic, the service life of the brake disc is remarkably prolonged, and the performance of the brake disc is remarkably improved. The method is suitable for high-performance vehicles and heavy-load transportation tools.

The invention relates to the technical field of electromagnetic brakes, in particular to an electromagnetic hydraulic braking structure and electric control electromagnetic hydraulic braking calipers. The electromagnetic hydraulic braking structure comprises a combined piston assembly, the combined piston assembly comprises a piston cylinder, the piston cylinder is provided with a first piston cavity and a second piston cavity which are communicated with each other, the first piston cavity is provided with a combined outer piston and a combined inner piston in a penetrating mode, and the second piston cavity is provided with a pressurizing small plunger in a penetrating mode; an oil storage cavity is formed outside the piston cylinder, and a plurality of oil holes are formed in the side wall of the piston cylinder and are communicated with the first piston cavity and the oil storage cavity; the electromagnet assembly comprises an armature, and the armature abuts against the combined inner piston; and the hydraulic braking assembly is internally provided with an oil way and communicates with the second piston cavity, and multi-stage pressure amplification is achieved through double-cavity linkage. Gap fluctuation between the brake pad and the brake disc in the braking process can be effectively controlled, the characteristic of large suction force of the tail end of the electromagnet is efficiently utilized, and meanwhile the stable braking effect is achieved.

A railway brake disc may include at least one brake disc segment. This segment can form at least part of an annular body that circumferentially encircles a center opening. The segment can be mounted to a railway wheel to be engaged by a brake caliper pad to slow or stop rotation of the railway wheel. The segment can include rows of protrusions located at different radial distances from a radial center of the at least one brake disc segment. The protrusions can include an outer row of circular columns located along an outer radial distance of the at least one brake disc segment, an inner row of columns located along an inner radial distance of the at least one brake disc segment, and at least one intermediate row of columns radially located between the inner row of the columns and the outer row of the circular columns.

The application discloses a kind of carbon ceramic brake pad for grinding carbon ceramic brake disc, belong to brake pad technical field, solve the poor heat dissipation performance of existing ceramic brake pad, insufficient connection strength, leading to the problem of poor friction performance, it includes carbon ceramic lining plate and the carbon ceramic friction surface installed on carbon ceramic lining plate, multiple mortise grooves are set on the upper surface of carbon ceramic lining plate, multiple tenon heads matched with mortise groove are set on the lower surface of carbon ceramic friction surface, tenon head is embedded into mortise groove and forms mortise and tenon structure, connects carbon ceramic lining plate and carbon ceramic friction surface, ear plate is set on the circumference of carbon ceramic lining plate, and mounting hole is formed in ear plate;In the application, the friction coefficient is adjusted by designing ceramic phase composition and density of carbon ceramic friction surface and carbon ceramic lining plate, and carbon ceramic lining plate and carbon ceramic friction surface are connected by RMI process and mortise and tenon structure to improve the mechanical properties of connecting place, ensure braking safety, reduce thermal stress generated in braking process, so as to improve the friction performance, effectively guarantee braking effect, and prolong service life.

The invention discloses a low-inherent-frequency ventilation type brake disc applied to novel surface cleaning equipment, which comprises a disc cap, an outer side friction disc, an inner side friction disc and a series of cylindrical ventilation ribs used for connecting the two friction discs, the outer side friction disc is connected with the disc cap, and the inner side friction disc is connected with the disc cap. The outer side friction disc and the inner side friction disc are connected through the ventilation ribs, the ventilation ribs are evenly distributed in the circumferential direction according to rows, each row of ventilation ribs is composed of a plurality of cylinders, the intervals of the ventilation ribs in the direction away from the disc cap are gradually increased, the tail ends of the ventilation ribs are narrowed, and the ventilation ribs are evenly distributed in the circumferential direction in a radial shape. Meanwhile, the inherent frequency can be reduced, and noise is reduced. According to the ventilation type brake disc, the lowest inherent frequency of the ventilation type brake disc is made to be about 1000 Hz mainly by changing the shapes and the sizes of the ventilation ribs, and noise and brake scream generated when the brake disc is subjected to point contact type brake cleaning are reduced.

Disclosed are a brake assembly, a brake disc, a wheel, and a vehicle. The brake assembly comprises a disc cap (1), a connecting assembly (3) connected to the disc cap, and an elastic member (4); the elastic member comprises a radial floating part (41); and the radial floating part is arranged between the disc cap and the connecting assembly along the radial direction of the disc cap, and is elastically deformable along the radial direction of the disc cap. In this way, the brake assembly has a floating margin in the radial direction relative to the disc cap, and therefore, during braking, eccentric wear between the brake assembly and the disc cap caused by radial tilting of the brake assembly relative to the disc cap can be avoided, thereby reducing the mechanical damage to a brake disc (2), avoiding the noise generation, and prolonging the service life of the brake assembly.