CN110230650B - Automobile disc brake - Google Patents
Automobile disc brake Download PDFInfo
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- CN110230650B CN110230650B CN201910498909.7A CN201910498909A CN110230650B CN 110230650 B CN110230650 B CN 110230650B CN 201910498909 A CN201910498909 A CN 201910498909A CN 110230650 B CN110230650 B CN 110230650B
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Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
- B29C67/24—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00 characterised by the choice of material
- B29C67/248—Moulding mineral fibres or particles bonded with resin, e.g. for insulating or roofing board
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L15/00—Compositions of rubber derivatives
- C08L15/005—Hydrogenated nitrile rubber
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L61/00—Compositions of condensation polymers of aldehydes or ketones; Compositions of derivatives of such polymers
- C08L61/04—Condensation polymers of aldehydes or ketones with phenols only
- C08L61/06—Condensation polymers of aldehydes or ketones with phenols only of aldehydes with phenols
- C08L61/14—Modified phenol-aldehyde condensates
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
- F16D55/02—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/02—Braking members; Mounting thereof
- F16D65/04—Bands, shoes or pads; Pivots or supporting members therefor
- F16D65/092—Bands, shoes or pads; Pivots or supporting members therefor for axially-engaging brakes, e.g. disc brakes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/14—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
- F16D65/16—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake
- F16D65/18—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake adapted for drawing members together, e.g. for disc brakes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
- F16D69/02—Compositions of linings; Methods of manufacturing
- F16D69/023—Composite materials containing carbon and carbon fibres or fibres made of carbonizable material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/16—Frictional elements, e.g. brake or clutch linings
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
- C08L2205/16—Fibres; Fibrils
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
- F16D2055/0004—Parts or details of disc brakes
- F16D2055/0045—Braking members arranged non-symmetrically with respect to the brake disc
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
- F16D2055/0075—Constructional features of axially engaged brakes
- F16D2055/0079—Constructional features of axially engaged brakes with braking members arranged non-symmetrically with respect to the rotor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
- F16D2055/0075—Constructional features of axially engaged brakes
- F16D2055/0091—Plural actuators arranged side by side on the same side of the rotor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2121/00—Type of actuator operation force
- F16D2121/02—Fluid pressure
- F16D2121/04—Fluid pressure acting on a piston-type actuator, e.g. for liquid pressure
Abstract
The invention discloses an automobile disc brake, which comprises a brake disc and a brake caliper body, and is characterized in that the brake disc is connected with an axle bracket through a flange, the brake caliper body comprises a first piston cylinder body and a second piston cylinder body, the first piston cylinder body and the second piston cylinder body are arranged on the inner side of the brake disc, the second piston cylinder body is arranged at the front end of the first piston cylinder body, a first brake pad and a second brake pad are respectively arranged between the first piston cylinder body, the second piston cylinder body and the brake disc, the first brake pad and the second brake pad are respectively fixed on one side of the first piston cylinder body and one side of the second piston cylinder body, the protruding problem in later maintenance is perfected through the automobile disc brake, the problem that a person does not step on the brake to cause piston to be separated in maintenance is prevented, and the durability of the brake pad is improved through a novel brake pad, the service cycle of the brake pad is greatly prolonged, and accidents caused by the brake problem are reduced.
Description
Technical Field
The invention belongs to the field of brakes, and particularly relates to an automobile disc brake.
Background
In the later stage maintenance of vehicle, essential when the vehicle drives the change of brake block behind certain mileage, this relation driver and crew's safety, personnel all appear the accident because of the brake problem each year, especially the durable problem of brake block urgently need obtain improving, and in the maintenance in-process in the later stage for preventing to appear when changing the brake block, the problem of deviating from appears the piston, protection design when also needing to carry out later stage maintenance, but now has not appeared to the design in this aspect, although patent number: CN200910306757.2 discloses a brake with an auxiliary piston, which improves the braking stability; the abrasion of the sealing ring and the oil cavity is reduced; the weight of the piston is reduced, so that the return performance of the piston is improved, but the problem of piston falling-out in later maintenance is not mentioned.
Patent numbers: CN201520632570.2 is a double-caliper disc brake, but the protection piston of the brake pad is not shown in the later stage of the double-caliper disc brake, during the replacement process, the brake pedal is not needed to be stepped to make the brake piston separate, so that brake oil is leaked, the installation process is difficult, the economic loss of a driver is caused, and the installation time is prolonged. The problem is more and more prominent due to the large increase of vehicles in China, and needs to be solved.
Disclosure of Invention
To address the above-mentioned problems with the prior art, the present application provides an automotive disc brake.
The technical scheme of the invention is as follows:
an automobile disc brake comprises a brake disc and a brake caliper body, wherein the brake disc is connected with an axle support through a flange, the brake caliper body comprises a first piston cylinder body and a second piston cylinder body, the first piston cylinder body and the second piston cylinder body are installed on the inner side of the brake disc, the second piston cylinder body is installed at the front end of the first piston cylinder body, a first brake pad and a second brake pad are respectively installed between the first piston cylinder body and the brake disc and between the second piston cylinder body and the brake disc, and the first brake pad and the second brake pad are respectively fixed on one side of the first piston cylinder body and one side of the second piston cylinder body;
piston stop device is installed with first piston cylinder body outer wall on, first piston cylinder body with second piston cylinder body carries out the fuel feeding through defeated oil pipe, defeated oil pipe is provided with electromagnetism blocking device, first piston cylinder body with be provided with the periphery on the piston of second piston cylinder body and be provided with the recess.
The braking distance can be effectively reduced through the configuration of the first piston cylinder body and the second piston cylinder body in the driving process, the running of the second piston cylinder body is controlled through a driving computer, when the driving speed of a vehicle is less than 80 kilometers per hour, the second piston cylinder body is not started in the braking process, only the first piston cylinder body is used for braking, when the driving speed exceeds 80 kilometers per hour, the second piston cylinder body is started in the braking process, the braking distance is greatly reduced, accidents are prevented, the piston limiting devices are arranged on the cylinder walls of the first piston cylinder body and the second piston cylinder body, the purpose of preventing the piston from being exposed through the piston limiting device when the brake pad is replaced is to prevent hydraulic oil from being reduced, secondary prevention is carried out on an oil pipeline for preventing problems, an electromagnetic blocking device is arranged, and the condition that a person does not step on a brake pedal when the brake pad is replaced is prevented, the first piston cylinder body and the second piston cylinder body are identical in structure.
Preferably, the piston limiting device comprises an arc-shaped clamp, the rear end of the arc-shaped clamp is connected with a bolt, the bolt penetrates through the outer wall of the first piston cylinder body, and the arc-shaped clamp can be embedded in the groove through the rotation movement of the bolt; because the piston is the cylinder in piston stop device, the stop device front end is the arc card with cylinder intermeshing, be convenient for block the piston better when carrying out manual rotation and advancing, prevent that the piston from deviating from, the arc card is when not using, with cylinder body intermeshing, can not influence the motion of piston, and at operating condition, the piston recess can not reach the position of arc card, only when more smooth brake block, the brake block is dismantled to the personnel, use manually to push the piston, the piston recess gets into the piston cylinder, use the arc card to block in the piston recess.
Preferably, a sealing ring is installed on the circumference of the front end of the bolt, the arc angle of the arc-shaped clamp is the same as that of the first piston cylinder, and the sealing ring is used for preventing oil leakage when the rotary bolt moves forward.
Preferably, the electromagnetic blocking device comprises a touch switch and an electromagnetic valve body, the touch switch is mounted on one side of the bolt, a pit is formed in the bolt, a contact on the touch switch is meshed with the pit, the contact is touched when the bolt rotates forwards, and the electromagnetic valve body is controlled by the touch switch; in order to prevent the piston from being damaged due to the fact that oil in the hydraulic oil pipe continuously pushes the piston cylinder body, the electromagnetic blocking device is arranged, a touch switch and the electromagnetic valve body are used for blocking, the touch switch is arranged on one side of the bolt, and the touch switch can be triggered through the advancing of the bolt to complete the closing of the electromagnetic valve body.
Preferably, the first brake pad and the second brake pad both comprise a steel plate and a friction material layer, and the friction material layer comprises the following components in parts by weight: 2-10 parts of cashew nut oil modified phenolic resin, 2-12 parts of hydrogenated nitrile rubber, 4-8 parts of silicon carbide fiber, 3-5 parts of vermiculite, 2-8 parts of graphene, 3-5 parts of vegetable fiber, 0.5-5 parts of vulcanizing agent, 3-5 parts of steel fiber, 2-4 parts of barium titanate, 0.5-2 parts of zinc stearate, 0.01-1 part of accelerant TT, and 0.01-1 part of N-phenyl-2-naphthylamine.
Preferably, the preparation method of the friction material layer of the automobile disc brake comprises the following steps:
1) mixing raw materials: uniformly mixing 4-8 parts of silicon carbide fiber, 3-5 parts of vermiculite, 2-8 parts of graphene, 3-5 parts of vegetable fiber and 3-5 parts of steel fiber;
2) kneading raw materials: adding 2-10 parts of cashew nut oil modified phenolic resin, 2-12 parts of hydrogenated nitrile rubber, 2-4 parts of barium titanate, 0.5-2 parts of zinc stearate, 0.01-1 part of accelerator TT and 0.01-1 part of N-phenyl-2-naphthylamine into the mixture obtained in the step 1) for kneading;
3) mixing: mixing the product kneaded in the step 2) at 250-350 ℃ for 10-50 min;
4) tabletting: carrying out hot press molding on the product obtained after mixing in the step 3) in a mold, controlling the pressure to be 80-300 MPa, and carrying out hot press for 2-15 min;
5) and (3) vulcanization: adding 0.5-5 parts of vulcanizing agent into the product formed by pressing in the step 4) for vulcanizing, wherein the vulcanizing temperature is set to be 120-230 ℃, and the pressure is set to be 2-50 MPa;
6) grinding: carrying out coping treatment on the product obtained in the step 5) to obtain a finished product of the friction material layer.
Preferably, the friction material layer is bonded on the steel plate through a binder, and the binder is cashew nut oil modified resin or butyronitrile modified phenolic resin; the high-temperature-resistant rubber has excellent high-temperature resistance, good impact resistance and thermal stability, high wear resistance, small thermal expansion rate and long service life.
The beneficial technical effects of the invention are as follows: the outstanding problem that appears in the later stage maintenance has been perfected through car disc brake, need not step on the brake when having prevented personnel's maintenance and causes the problem that the piston deviates from, has improved the durability of brake block through neotype brake block, has improved the life cycle of brake block greatly, reduces the accident that causes because of the brake problem.
Drawings
Fig. 1 is a schematic structural diagram of a disc brake of the present invention.
Fig. 2 is a partial schematic view of the disc brake of the present invention.
Fig. 3 is a schematic structural view of the piston limiting device of the present invention.
In the figure: 1. brake disc, 2, the brake caliper body, 3, first piston cylinder body, 4, second piston cylinder body, 5 first brake pads, 6, second brake pads, 7, defeated oil pipe, 8, recess, 9, arc card, 10, bolt. 11. The device comprises a first piston cylinder outer wall, 12, a touch switch, 13, an electromagnetic valve body, 14, a pit, 15, a contact, 16, a steel plate, 17 and a friction material layer.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings.
Example 1
An automobile disc brake comprises a brake disc 1 and a brake caliper body 2, wherein the brake disc 1 is connected with an axle support through a flange, the brake caliper body 2 comprises a first piston cylinder body 3 and a second piston cylinder body 4, the first piston cylinder body 3 and the second piston cylinder body 4 are installed on the inner side of the brake disc 1, the second piston cylinder body 4 is installed at the front end of the first piston cylinder body 3, a first brake pad 5 and a second brake pad 6 are respectively installed between the first piston cylinder body 3, the second piston cylinder body 4 and the brake disc 1, the first brake pad 5 and the second brake pad 6 are respectively fixed on one side of the first piston cylinder body 3 and one side of the second piston cylinder body 4, a piston limiting device is installed on the outer wall of the second piston cylinder body 4 and the first piston cylinder body 3, and the first piston cylinder body 3 and the second piston cylinder body 4 are supplied with oil through an oil pipe 7, the oil delivery pipe 7 is provided with an electromagnetic blocking device, and the pistons of the first piston cylinder 3 and the second piston cylinder 4 are provided with grooves 8 around; the braking distance can be effectively reduced through the configuration of the first piston cylinder body 3 and the second piston cylinder body 4 in the driving process, the running of the second piston cylinder body 4 is controlled through a driving computer, when the driving speed of a vehicle is less than 80 kilometers per hour, the second piston cylinder body 4 is not started in the braking process, only the first piston cylinder body 3 is used for braking, when the driving speed exceeds 80 kilometers per hour, the second piston cylinder body 4 is started in the braking process, the braking distance is greatly reduced, accidents are prevented, the piston limiting devices are arranged on the cylinder body walls of the first piston cylinder body 3 and the second piston cylinder body 4, the piston limiting devices are used for preventing the piston from being exposed when the brake pad is replaced, hydraulic oil is not reduced, secondary prevention is carried out on an oil pipeline to prevent problems, electromagnetic blocking devices are arranged, and the condition that a person steps on a brake pedal when the brake pad is replaced is prevented, the first piston cylinder 3 is identical in structure to the second piston cylinder 4.
The piston limiting device comprises an arc-shaped clamp 9, the rear end of the arc-shaped clamp 9 is connected with a bolt 10, the bolt 10 penetrates through the outer wall 11 of the first piston cylinder body, and the arc-shaped clamp 9 can be embedded in the groove 8 through the rotation and the movement of the bolt 10; because the piston is the cylinder in piston stop device, stop device front end is the arc card 9 with cylinder intermeshing, be convenient for block the piston better when carrying out manual rotation and advancing, prevent that the piston from deviating from, arc card 9 is when not using, be with cylinder body intermeshing, can not influence the motion of piston, and at operating condition, piston recess 8 can not reach the position of arc card 9, only when more smooth brake block, personnel dismantle the brake block, use manually to push the piston, piston recess 8 gets into the piston cylinder, use arc card 9 card to go into in the piston recess 8.
The sealing ring is installed at the periphery of the front end of the bolt 10, the arc angle of the arc-shaped clamp 9 is the same as that of the first piston cylinder body 3, and the sealing ring is used for preventing oil leakage when the bolt 10 is rotated to advance.
The electromagnetic blocking device comprises a touch switch 12 and an electromagnetic valve body 13, the touch switch 12 is installed on one side of the bolt 10, a pit 14 is formed in the bolt 10, a contact 15 on the touch switch 12 is meshed with the pit 14, the contact 15 is touched when the bolt 10 rotates forwards, and the electromagnetic valve body 13 is controlled by the touch switch 12; in order to prevent the piston from being damaged due to the fact that oil in the hydraulic oil pipe continuously pushes the piston cylinder, the electromagnetic blocking device is arranged, the touch switch 12 and the electromagnetic valve body 13 are used for blocking, the touch switch 12 is arranged on one side of the bolt 10, and the touch switch 12 can be triggered through the advancing of the bolt 10 to complete the closing of the electromagnetic valve body 13.
The first brake pad 5 and the second brake pad 6 both comprise a steel plate 16 and a friction material layer 17, and the friction material layer 17 comprises the following components in parts by weight: 2 parts of cashew nut oil modified phenolic resin, 12 parts of hydrogenated nitrile rubber, 4 parts of silicon carbide fiber, 5 parts of vermiculite, 2 parts of graphene, 3 parts of vegetable fiber, 3 parts of vulcanizing agent, 5 parts of steel fiber, 2 parts of barium titanate, 0.5 part of zinc stearate, 0.01 part of accelerator TT and 0.01 part of N-phenyl-2-naphthylamine; the first brake pad and the second brake pad are made of wear-resistant materials, have long service life, are sparkless, odorless, low in noise and good in heat dissipation performance.
The preparation method of the friction material layer of the automobile disc brake comprises the following steps:
1) mixing raw materials: firstly, uniformly mixing 4 parts of silicon carbide fiber, 5 parts of vermiculite, 2 parts of graphene, 3 parts of vegetable fiber and 5 parts of steel fiber;
2) kneading raw materials: adding 2 parts of cashew nut oil modified phenolic resin, 12 parts of hydrogenated nitrile rubber, 2 parts of barium titanate, 0.5 part of zinc stearate, 0.01 part of accelerator TT and 0.01 part of N-phenyl-2-naphthylamine into the mixture obtained in the step 1) for kneading;
3) mixing: mixing the kneaded product in the step 2) for 50min at 250 ℃;
4) tabletting: carrying out hot-press molding on the product obtained after mixing in the step 3) in a mold, controlling the pressure to be 80MPa, and carrying out hot-press time for 15 min;
5) and (3) vulcanization: adding 3 parts of vulcanizing agent into the product formed by pressing in the step 4) for vulcanizing, wherein the vulcanizing temperature is set to be 120 ℃, and the pressure is set to be 50 MPa;
6) grinding: carrying out coping treatment on the product obtained in the step 5) to obtain a finished product of the friction material layer.
The friction material layer 17 is bonded on the steel plate 16 through a binder, and the binder is cashew nut oil modified resin or butyronitrile modified phenolic resin; the high-temperature-resistant rubber has excellent high-temperature resistance, good impact resistance and thermal stability, high wear resistance, small thermal expansion rate and long service life.
Example 2
An automobile disc brake comprises a brake disc 1 and a brake caliper body 2, wherein the brake disc 1 is connected with an axle support through a flange, the brake caliper body 2 comprises a first piston cylinder body 3 and a second piston cylinder body 4, the first piston cylinder body 3 and the second piston cylinder body 4 are installed on the inner side of the brake disc 1, the second piston cylinder body 4 is installed at the front end of the first piston cylinder body 3, a first brake pad 5 and a second brake pad 6 are respectively installed between the first piston cylinder body 3, the second piston cylinder body 4 and the brake disc 1, the first brake pad 5 and the second brake pad 6 are respectively fixed on one side of the first piston cylinder body 3 and one side of the second piston cylinder body 4, a piston limiting device is installed on the outer wall of the second piston cylinder body 4 and the first piston cylinder body 3, and the first piston cylinder body 3 and the second piston cylinder body 4 are supplied with oil through an oil pipe 7, the oil delivery pipe 7 is provided with an electromagnetic blocking device, and the pistons of the first piston cylinder 3 and the second piston cylinder 4 are provided with grooves 8 around; the braking distance can be effectively reduced through the configuration of the first piston cylinder body 3 and the second piston cylinder body 4 in the driving process, the running of the second piston cylinder body 4 is controlled through a driving computer, when the driving speed of a vehicle is less than 80 kilometers per hour, the second piston cylinder body 4 is not started in the braking process, only the first piston cylinder body 3 is used for braking, when the driving speed exceeds 80 kilometers per hour, the second piston cylinder body 4 is started in the braking process, the braking distance is greatly reduced, accidents are prevented, the piston limiting devices are arranged on the cylinder body walls of the first piston cylinder body 3 and the second piston cylinder body 4, the piston limiting devices are used for preventing the piston from being exposed when the brake pad is replaced, hydraulic oil is not reduced, secondary prevention is carried out on an oil pipeline to prevent problems, electromagnetic blocking devices are arranged, and the condition that a person steps on a brake pedal when the brake pad is replaced is prevented, the first piston cylinder 3 is identical in structure to the second piston cylinder 4.
The piston limiting device comprises an arc-shaped clamp 9, the rear end of the arc-shaped clamp 9 is connected with a bolt 10, the bolt 10 penetrates through the outer wall 11 of the first piston cylinder body, and the arc-shaped clamp 9 can be embedded in the groove 8 through the rotation and the movement of the bolt 10; because the piston is the cylinder in piston stop device, stop device front end is the arc card 9 with cylinder intermeshing, be convenient for block the piston better when carrying out manual rotation and advancing, prevent that the piston from deviating from, arc card 9 is when not using, be with cylinder body intermeshing, can not influence the motion of piston, and at operating condition, piston recess 8 can not reach the position of arc card 9, only when more smooth brake block, personnel dismantle the brake block, use manually to push the piston, piston recess 8 gets into the piston cylinder, use arc card 9 card to go into in the piston recess 8.
The sealing ring is installed at the periphery of the front end of the bolt 10, the arc angle of the arc-shaped clamp 9 is the same as that of the first piston cylinder body 3, and the sealing ring is used for preventing oil leakage when the bolt 10 is rotated to advance.
The electromagnetic blocking device comprises a touch switch 12 and an electromagnetic valve body 13, the touch switch 12 is installed on one side of the bolt 10, a pit 14 is formed in the bolt 10, a contact 15 on the touch switch 12 is meshed with the pit 14, the contact 15 is touched when the bolt 10 rotates forwards, and the electromagnetic valve body 13 is controlled by the touch switch 12; in order to prevent the piston from being damaged due to the fact that oil in the hydraulic oil pipe continuously pushes the piston cylinder, the electromagnetic blocking device is arranged, the touch switch 12 and the electromagnetic valve body 13 are used for blocking, the touch switch 12 is arranged on one side of the bolt 10, and the touch switch 12 can be triggered through the advancing of the bolt 10 to complete the closing of the electromagnetic valve body 13.
The first brake pad 5 and the second brake pad 6 both comprise a steel plate 16 and a friction material layer 17, and the friction material layer 17 comprises the following components in parts by weight: 10 parts of cashew nut oil modified phenolic resin, 2 parts of hydrogenated nitrile rubber, 8 parts of silicon carbide fiber, 3 parts of vermiculite, 8 parts of graphene, 3 parts of vegetable fiber, 3 parts of vulcanizing agent, 3 parts of steel fiber, 4 parts of barium titanate, 2 parts of zinc stearate, TT1 parts of accelerator and 1 part of N-phenyl-2-naphthylamine; the first brake pad and the second brake pad are made of wear-resistant materials, have long service life, are sparkless, odorless, low in noise and good in heat dissipation performance.
The preparation method of the friction material layer of the automobile disc brake comprises the following steps:
1) mixing raw materials: uniformly mixing 8 parts of silicon carbide fiber, 3 parts of vermiculite, 8 parts of graphene, 3 parts of vegetable fiber and 3 parts of steel fiber;
2) kneading raw materials: adding 10 parts of cashew nut oil modified phenolic resin, 2 parts of hydrogenated nitrile rubber, 4 parts of barium titanate, 2 parts of zinc stearate, 1 parts of accelerator TT and 1 part of N-phenyl-2-naphthylamine into the mixture obtained in the step 1) for kneading;
3) mixing: mixing the kneaded product in the step 2) for 35min at the temperature of 300 ℃;
4) tabletting: carrying out hot-press molding on the product obtained after mixing in the step 3) in a mold, controlling the pressure to be 200MPa, and carrying out hot-press time for 8 min;
5) and (3) vulcanization: adding 3 parts of vulcanizing agent into the product formed by pressing in the step 4) for vulcanizing, wherein the vulcanizing temperature is set to be 180 ℃, and the pressure is set to be 30 MPa;
6) grinding: carrying out coping treatment on the product obtained in the step 5) to obtain a finished product of the friction material layer.
The friction material layer 17 is bonded on the steel plate 16 through a binder, and the binder is cashew nut oil modified resin or butyronitrile modified phenolic resin; the high-temperature-resistant rubber has excellent high-temperature resistance, good impact resistance and thermal stability, high wear resistance, small thermal expansion rate and long service life.
Example 3
An automobile disc brake comprises a brake disc 1 and a brake caliper body 2, wherein the brake disc 1 is connected with an axle support through a flange, the brake caliper body 2 comprises a first piston cylinder body 3 and a second piston cylinder body 4, the first piston cylinder body 3 and the second piston cylinder body 4 are installed on the inner side of the brake disc 1, the second piston cylinder body 4 is installed at the front end of the first piston cylinder body 3, a first brake pad 5 and a second brake pad 6 are respectively installed between the first piston cylinder body 3, the second piston cylinder body 4 and the brake disc 1, the first brake pad 5 and the second brake pad 6 are respectively fixed on one side of the first piston cylinder body 3 and one side of the second piston cylinder body 4, a piston limiting device is installed on the outer wall of the second piston cylinder body 4 and the first piston cylinder body 3, and the first piston cylinder body 3 and the second piston cylinder body 4 are supplied with oil through an oil pipe 7, the oil delivery pipe 7 is provided with an electromagnetic blocking device, and the pistons of the first piston cylinder 3 and the second piston cylinder 4 are provided with grooves 8 around; the braking distance can be effectively reduced through the configuration of the first piston cylinder body 3 and the second piston cylinder body 4 in the driving process, the running of the second piston cylinder body 4 is controlled through a driving computer, when the driving speed of a vehicle is less than 80 kilometers per hour, the second piston cylinder body 4 is not started in the braking process, only the first piston cylinder body 3 is used for braking, when the driving speed exceeds 80 kilometers per hour, the second piston cylinder body 4 is started in the braking process, the braking distance is greatly reduced, accidents are prevented, the piston limiting devices are arranged on the cylinder body walls of the first piston cylinder body 3 and the second piston cylinder body 4, the piston limiting devices are used for preventing the piston from being exposed when the brake pad is replaced, hydraulic oil is not reduced, secondary prevention is carried out on an oil pipeline to prevent problems, electromagnetic blocking devices are arranged, and the condition that a person steps on a brake pedal when the brake pad is replaced is prevented, the first piston cylinder 3 is identical in structure to the second piston cylinder 4.
The piston limiting device comprises an arc-shaped clamp 9, the rear end of the arc-shaped clamp 9 is connected with a bolt 10, the bolt 10 penetrates through the outer wall 11 of the first piston cylinder body, and the arc-shaped clamp 9 can be embedded in the groove 8 through the rotation and the movement of the bolt 10; because the piston is the cylinder in piston stop device, stop device front end is the arc card 9 with cylinder intermeshing, be convenient for block the piston better when carrying out manual rotation and advancing, prevent that the piston from deviating from, arc card 9 is when not using, be with cylinder body intermeshing, can not influence the motion of piston, and at operating condition, piston recess 8 can not reach the position of arc card 9, only when more smooth brake block, personnel dismantle the brake block, use manually to push the piston, piston recess 8 gets into the piston cylinder, use arc card 9 card to go into in the piston recess 8.
The sealing ring is installed at the periphery of the front end of the bolt 10, the arc angle of the arc-shaped clamp 9 is the same as that of the first piston cylinder body 3, and the sealing ring is used for preventing oil leakage when the bolt 10 is rotated to advance.
The electromagnetic blocking device comprises a touch switch 12 and an electromagnetic valve body 13, the touch switch 12 is installed on one side of the bolt 10, a pit 14 is formed in the bolt 10, a contact 15 on the touch switch 12 is meshed with the pit 14, the contact 15 is touched when the bolt 10 rotates forwards, and the electromagnetic valve body 13 is controlled by the touch switch 12; in order to prevent the piston from being damaged due to the fact that oil in the hydraulic oil pipe continuously pushes the piston cylinder, the electromagnetic blocking device is arranged, the touch switch 12 and the electromagnetic valve body 13 are used for blocking, the touch switch 12 is arranged on one side of the bolt 10, and the touch switch 12 can be triggered through the advancing of the bolt 10 to complete the closing of the electromagnetic valve body 13.
The first brake pad 5 and the second brake pad 6 both comprise a steel plate 16 and a friction material layer 17, and the friction material layer 17 comprises the following components in parts by weight: 6 parts of cashew nut oil modified phenolic resin, 8 parts of hydrogenated nitrile rubber, 6 parts of silicon carbide fiber, 4 parts of vermiculite, 3 parts of graphene, 4 parts of vegetable fiber, 4 parts of vulcanizing agent, 4 parts of steel fiber, 4 parts of barium titanate, 0.5 part of zinc stearate, 0.5 part of accelerator TT and 0.5 part of N-phenyl-2-naphthylamine; the first brake pad and the second brake pad are made of wear-resistant materials, have long service life, are sparkless, odorless, low in noise and good in heat dissipation performance.
The preparation method of the friction material layer of the automobile disc brake comprises the following steps:
1) mixing raw materials: firstly, uniformly mixing 6 parts of silicon carbide fiber, 4 parts of vermiculite, 3 parts of graphene, 4 parts of vegetable fiber and 4 parts of steel fiber;
2) kneading raw materials: adding 6 parts of cashew nut oil modified phenolic resin, 8 parts of hydrogenated nitrile rubber, 4 parts of barium titanate, 0.5 part of zinc stearate, 0.5 part of accelerator TT and 0.5 part of N-phenyl-2-naphthylamine into the mixture obtained in the step 1) for kneading;
3) mixing: mixing the kneaded product in the step 2) for 10min at 350 ℃;
4) tabletting: carrying out hot-press molding on the product obtained after mixing in the step 3) in a mold, controlling the pressure to be 300MPa, and carrying out hot-press time for 2 min;
5) and (3) vulcanization: adding 4 parts of vulcanizing agent into the product formed by pressing in the step 4) for vulcanizing, wherein the vulcanizing temperature is set to be 230 ℃, and the pressure is set to be 2 MPa;
6) grinding: carrying out coping treatment on the product obtained in the step 5) to obtain a finished product of the friction material layer.
The friction material layer 17 is bonded on the steel plate 16 through a binder, and the binder is cashew nut oil modified resin or butyronitrile modified phenolic resin; the high-temperature-resistant rubber has excellent high-temperature resistance, good impact resistance and thermal stability, high wear resistance, small thermal expansion rate and long service life.
Examples of the experiments
The friction material layers in examples 1 to 3 were subjected to a performance test, and the friction material layers on commercially available brake pads were used as comparative examples, and the test standards were in accordance with GB/T531.1-2008 "method for press-in hardness test of vulcanized rubber or thermoplastic rubber part 1: shore durometer method (Shore hardness), GB/T528 & lt- & gt 2009 & lt test & gt of tensile stress strain performance of vulcanized rubber or thermoplastic rubber & lt- & gt, GB/T3512-2001 & lt & gt of vulcanized rubber or thermoplastic rubber & lt- & gt, GB/T1689-1998 & lt test & gt of abrasion resistance of vulcanized rubber (using Akron abrasion machine) & lt- & gt, GB/T1697 & lt- & gt 2001 & lt determination of impact strength of hard rubber & lt- & gt, and GB/T10294 & lt 2008 & gt 2008 & lt & gt & lt & gt of steady-state thermal resistance of thermal insulation material and measurement of related characteristics & lt.
Table 1 shows friction material layer performance test data:
from table 1, it can be compared: the high temperature resistance, the impact resistance and the heat dissipation performance of the embodiment 1, the embodiment 2 and the embodiment 3 are excellent, and the abrasion resistance is outstanding.
The disc brake meets good technical requirements, the material of the brake pad has good heat conducting property, so that the friction coefficient is controlled between 0.39 and 0.43 when the temperature is between 0 and 600 degrees Fahrenheit, the disc brake also has reliable safety, the heat fading property of the brake pad is reduced due to the excellent heat conducting property when the disc brake is applied to emergency braking, the braking effect is increased, particularly, the comfort is also well improved, the braking noise is controlled between 0 and 800 Hz, a driver and passengers can not hear the braking noise in a vehicle, the wear resistance of the brake is also prolonged, and the replacement period of the brake pad reaches 5 kilometers.
The beneficial technical effects of the invention are as follows: the outstanding problem that appears in the later stage maintenance has been perfected through car disc brake, need not step on the brake when having prevented personnel's maintenance and causes the problem that the piston deviates from, has improved the durability of brake block through neotype brake block, has improved the life cycle of brake block greatly, reduces the accident that causes because of the brake problem.
While the embodiments of the present invention have been disclosed above, it is not limited to the applications listed in the description and embodiments, but is fully applicable to various fields suitable for the present invention, and it will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in the embodiments without departing from the principle and spirit of the present invention, and therefore the present invention is not limited to the specific details without departing from the general concept defined in the claims and the scope of equivalents thereof.
Claims (6)
1. An automobile disc brake comprises a brake disc and a brake caliper body, and is characterized in that the brake disc is connected with an axle bracket through a flange, the brake caliper body comprises a first piston cylinder body and a second piston cylinder body, the first piston cylinder body and the second piston cylinder body are installed on the inner side of the brake disc, the second piston cylinder body is installed at the front end of the first piston cylinder body, a first brake pad and a second brake pad are respectively installed between the first piston cylinder body, the second piston cylinder body and the brake disc, and the first brake pad and the second brake pad are respectively fixed on one side of the first piston cylinder body and one side of the second piston cylinder body;
piston limiting devices are arranged on the outer walls of the second piston cylinder body and the first piston cylinder body, the first piston cylinder body and the second piston cylinder body are supplied with oil through an oil conveying pipe, the oil conveying pipe is provided with an electromagnetic blocking device, and the pistons of the first piston cylinder body and the second piston cylinder body are provided with grooves on the peripheries;
the piston limiting device comprises an arc-shaped clamp, a bolt is connected to the rear end of the arc-shaped clamp, the bolt penetrates through the outer wall of the first piston cylinder body, and the arc-shaped clamp can be embedded in the groove through rotary movement of the bolt.
2. The disc brake of claim 1, wherein a sealing ring is installed on the circumference of the front end of the bolt, and the arc angle of the arc-shaped clamp is the same as the arc angle of the piston cylinder.
3. The disc brake of claim 1, wherein the electromagnetic blocking device comprises a trigger switch and an electromagnetic valve body, the trigger switch is mounted on one side of the bolt, the bolt is provided with a pit, a contact on the trigger switch is meshed with the pit, the bolt rotates forwards to trigger the contact, and the electromagnetic valve body is controlled by the trigger switch.
4. The automotive disc brake of claim 1, wherein the first brake pad and the second brake pad each comprise a steel plate and a friction material layer, and the friction material layer comprises the following components in parts by weight: 2-10 parts of cashew nut oil modified phenolic resin, 2-12 parts of hydrogenated nitrile rubber, 4-8 parts of silicon carbide fiber, 3-5 parts of vermiculite, 2-8 parts of graphene, 3-5 parts of vegetable fiber, 0.5-5 parts of vulcanizing agent, 3-5 parts of steel fiber, 2-4 parts of barium titanate, 0.5-2 parts of zinc stearate, 0.01-1 part of accelerant TT, and 0.01-1 part of N-phenyl-2-naphthylamine.
5. Method for producing a friction material layer for an automotive disc brake, according to claim 4, characterized by comprising the following steps:
1) mixing raw materials: uniformly mixing 4-8 parts of silicon carbide fiber, 3-5 parts of vermiculite, 2-8 parts of graphene, 3-5 parts of vegetable fiber and 3-5 parts of steel fiber;
2) kneading raw materials: adding 2-10 parts of cashew nut oil modified phenolic resin, 2-12 parts of hydrogenated nitrile rubber, 2-4 parts of barium titanate, 0.5-2 parts of zinc stearate, 0.01-1 part of accelerator TT and 0.01-1 part of N-phenyl-2-naphthylamine into the mixture obtained in the step 1) for kneading;
3) mixing: mixing the product kneaded in the step 2) at 250-350 ℃ for 10-50 min;
4) tabletting: carrying out hot press molding on the product obtained after mixing in the step 3) in a mold, controlling the pressure to be 80-300 MPa, and carrying out hot press for 2-15 min;
5) and (3) vulcanization: adding 0.5-5 parts of vulcanizing agent into the product formed by pressing in the step 4) for vulcanizing, wherein the vulcanizing temperature is set to be 120-230 ℃, and the pressure is set to be 2-50 MPa;
6) grinding: carrying out coping treatment on the product obtained in the step 5) to obtain a finished product of the friction material layer.
6. The automotive disc brake of claim 4, wherein the friction material layer is bonded to the steel plate by an adhesive, and the adhesive is cashew oil modified resin or butyronitrile modified phenolic resin.
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| CN201910498909.7A CN110230650B (en) | 2019-06-11 | 2019-06-11 | Automobile disc brake |
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| US6986410B2 (en) * | 2003-06-10 | 2006-01-17 | Leisure Products, Inc. | Multiple feed brake caliper |
| CN1632343A (en) * | 2003-12-22 | 2005-06-29 | 郭炜 | Braking arrangement |
| CN2729419Y (en) * | 2004-06-09 | 2005-09-28 | 陈利祥 | Hydraulic fist type float pincer double-piston disc brake for vehicle |
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Effective date of registration: 20240110 Address after: 230000 floor 1, building 2, phase I, e-commerce Park, Jinggang Road, Shushan Economic Development Zone, Hefei City, Anhui Province Patentee after: Dragon totem Technology (Hefei) Co.,Ltd. Address before: No.359, Section 1, Wanjiali North Road, Changsha City, Hunan Province Patentee before: HUNAN MECHANICAL & ELECTRICAL POLYTECHNIC |