CN111271394A - Device for collecting brake dust of vehicle disc brake - Google Patents
Device for collecting brake dust of vehicle disc brake Download PDFInfo
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- CN111271394A CN111271394A CN202010070350.0A CN202010070350A CN111271394A CN 111271394 A CN111271394 A CN 111271394A CN 202010070350 A CN202010070350 A CN 202010070350A CN 111271394 A CN111271394 A CN 111271394A
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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
- F16D65/00—Parts or details
- F16D65/0006—Noise or vibration control
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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
- F16D65/00—Parts or details
- F16D65/0031—Devices for retaining friction material debris, e.g. dust collectors or filters
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- Mechanical Engineering (AREA)
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Abstract
The invention relates to the technical field of vehicle disc brakes, in particular to a device for collecting brake dust of a vehicle disc brake. The dust collection device comprises a brake disc, a brake caliper and a dust collection device, wherein the brake caliper is matched with the brake disc, and the dust collection device comprises a dust collection mechanism, a pair of dust filtering mechanisms and a pair of peeling mechanisms. The dust collecting mechanism comprises a pair of collecting plates, and the bottoms of the collecting plates are connected in an involutory mode, so that mounting grooves are formed in the opposite inner sides of the collecting plates; the brake disc clearance cartridge that the braking pincers below corresponds is in the mounting groove for the lower extreme fixed connection of the installation end of a pair of collecting plate and braking pincers, the overhanging end of a pair of collecting plate and a pair of dust filter mechanism fixed mounting that corresponds. A first channel, a first dust channel and a second dust channel are correspondingly arranged on the pair of collecting plates respectively; braking dust is sucked from the first dust inlet and the arc-shaped groove, and the braking dust can be gathered on the arc-shaped groove, so that the collection efficiency of the braking dust is improved.
Description
Technical Field
The invention relates to the technical field of vehicle disc brakes, in particular to a device for collecting brake dust of a vehicle disc brake.
Background
Brakes of vehicles are largely classified into drum brakes and disc brakes. During braking, brake dust is generated by brake friction of any type of brake, so that the brake dust is discharged into the air to pollute the environment and harm human bodies. Because the disc brake belongs to an open structure and is widely applied, the generated influence is more obvious. Particularly, as the holding capacity of automobiles is improved, the urban traffic jam condition is more serious, and the braking frequency of the automobiles is higher and higher. On the other hand, with the development of new energy technology and the acceleration of industrialization process of vehicles, the zero-emission green and environment-friendly vehicle will probably replace the traditional vehicle in the future vehicle development, so that the brake dust will become the main pollution emission source of the future vehicle. Therefore, it has become necessary to control and collect brake dust generated when the vehicle brakes, especially the disc brakes, are braked. In contrast, there is currently no device or solution that reliably collects brake dust.
The dust collecting device in the prior art mainly comprises the following parts, namely a device for collecting braking dust by static, magnetic or electromagnetic dust, wherein a dust collecting plate is arranged near the friction surface of a disc brake; a device for collecting brake dust by generating suction effect through the rotation of a rotor is greatly influenced by the speed of a vehicle, and the collection efficiency is low when the vehicle brakes at low speed; a device for collecting brake dust by using a method of controlling air flow by using an on-board computer to control the size of a valve according to the speed of a vehicle, the device wraps the whole brake caliper by using a capturing guide pipe, the volume is large, the brake dust is easy to escape from the guide pipe when the vehicle is at a low speed or is static, and the collection efficiency is low.
Disclosure of Invention
The invention provides a device for collecting brake dust of a disc brake of a vehicle, aiming at the problems that the collection rate of the brake dust is low and the brake dust is easy to escape from a guide pipe when a vehicle is braked at a low speed or is static in the prior art.
The specific technical scheme is as follows:
a device for collecting brake dust of a vehicle disc brake, the device comprising a pair of collecting plates 3 in an arc shape, a pair of dust filtering mechanisms 4 and a pair of peeling mechanisms 5;
the bottoms of the pair of collecting plates 3 are connected in an involutory manner, so that mounting grooves are formed on the opposite inner sides of the pair of collecting plates 3, one end of each collecting plate is a mounting end, the other end of each collecting plate is a hanging end, and the hanging ends and the corresponding dust filtering mechanisms are fixedly mounted; the pair of collecting plates 3 are respectively and correspondingly provided with a first channel 31, a first dust channel 32 and a second dust channel 33; the first channel 31 penetrates through the collecting plate, an opening of the first channel 31 corresponding to the outer side of the collecting plate is an air inlet, an opening corresponding to the inner side of the collecting plate is a dust inlet 311, the air inlet is covered with an installation cover 312, and an inner cavity of the installation cover 312 is a gradually narrowed air inlet cavity;
the inlet of the first dust channel 32 is arranged at the bottom of the mounting groove and is a long and narrow arc-shaped groove 321, the outlet of the first dust channel 32 and the second dust channel 33 are communicated in the collecting plate, and an impeller 34 is arranged at the communicated position, so that a suspended blade below the impeller 34 corresponds to the second dust channel 33;
the outlet of the second dust channel 33 is correspondingly arranged on the overhanging end of the collecting plate and is a dust outlet 331, the dust outlet 331 is communicated with the inlet of the corresponding dust filtering mechanism, the inlet of the second dust channel 33 is communicated with the first channel 31 in the collecting plate, and the sectional area of the inlet end of the second dust channel 33 is larger than that of the first channel 31;
the pair of peeling mechanisms 5 are embedded in the corresponding pair of collecting plates 3, and each peeling mechanism comprises a peeling block 51; when the brake disc is installed, the brake disc 1 is inserted into the installation groove in a clearance mode, so that the installation ends of the pair of collecting plates 3 and the lower end of the brake caliper 2 are fixedly installed; when the vehicle brakes, the stripping block 51 can extend out of the inner side surface of the corresponding collecting plate and extrude the brake disc 1;
when the vehicle brakes at a higher vehicle speed or a higher speed, brake dust is sucked into the second dust passage 33 from the first dust inlet 311 and the arc-shaped groove 321; when the vehicle is braked or stationary at a relatively low vehicle speed, brake dust collects on the arc-shaped groove 321, and at the next vehicle acceleration, brake dust is sucked into the first dust passage 32.
Further, the cover opening of the mounting cover 312 faces the mounting end of the collecting plate horizontally, so that the cover opening of the mounting cover 312 faces the vehicle driving direction, and more than 2 flow baffle plates 313 are mounted in the mounting cover 312, each flow baffle plate is in a wedge shape with gradually increased thickness, so that the cavity volume of the air inlet cavity is gradually narrowed.
Furthermore, the vertical section of each collecting plate is L-shaped, the L-shaped short sides correspond to the inner sides of the bottoms of the collecting plates, and a pair of L-shaped short sides on the pair of collecting plates 3 are connected in an involutory manner, so that mounting grooves are formed on the opposite inner sides of the pair of collecting plates 3; an arc-shaped groove 321 is formed on the short edge of the L shape close to the installation end of the collecting plate, the arc-shaped groove 321 is formed along the outer circumference of the collecting plate, and the open end of the arc-shaped groove 321 faces the installation end of the collecting plate.
Further, a baffle 332 is installed in the second dust channel 33, so that brake dust in the dust filter mechanism can be prevented from flowing back into the second dust channel 33.
Further, each dust filtering mechanism comprises a cuboid box body, one side of the box body is fixedly connected with the overhanging ends of the pair of collecting plates 3, a cyclone dust collector 41 is arranged in the box body along the height direction, a dust hopper 42 is installed at the lower end of the cyclone dust collector 41, and a dust collector inlet 411 of the cyclone dust collector 41 is correspondingly communicated with a dust outlet 331 of the second dust channel 33. Furthermore, a fourth dust channel 43 is arranged at the upper end of the box body in a penetrating way, the upper pipeline of the cyclone dust collector 41 is communicated with the fourth dust channel 43,
the collection board that second dust passageway 33 top corresponds runs through and has seted up third dust passageway 35, and third dust passageway 35 and second dust passageway 33 link up in impeller 34 installation department, the import correspondence of third dust passageway 35 is seted up on the terminal surface of collection board overhang end, and is dust backward flow import 351, dust backward flow import 351 and fourth dust passageway 43 intercommunication, the export correspondence of third dust passageway 35 is seted up on the medial surface of the collection board between peeling means and first dust import 311, and is dust backward flow export 352.
Further, each peeling mechanism includes a rectangular pressing plate 52 and two partition plates 53;
the two clapboards 53 are vertically arranged along the length direction of the pressure plate 52, so that a stripping groove is formed in the middle of the pressure plate 52, the strip stripping block 51 is arranged in the stripping groove through a spring mechanism, the pressure plates 52 corresponding to the two sides of the stripping groove are respectively provided with a buffer mechanism,
the spring mechanism comprises three connecting springs 54 uniformly arranged in the stripping groove, so that the stripping block 51 is elastically arranged on the pressure plate 52, and the length direction of the stripping block 51 is consistent with the groove depth direction of the corresponding mounting groove.
Further, a pair of pressure holes 37 are respectively formed on the pair of collecting plates 31 corresponding to a pair of pressure plates on the pair of peeling mechanisms 5; when the vehicle is braked, the hydraulic cylinder of the disc brake presses the pressure plate 52 through the pressure hole 37, so that the stripping block 51 protrudes from the corresponding inner side of the collection plate and presses the brake disc 1.
Further, the buffer mechanism comprises three return springs 55 and an "L" -shaped baffle 56, the three return springs 55 are uniformly arranged on the pressing plates 52 corresponding to the two sides of the stripping groove, the short sides of the "L" -shaped baffle 56 are correspondingly pressed at the upper ends of the three return springs 55, the long sides of the "L" -shaped baffle 56 are vertically arranged on the two sides of the pressing plates 52 in the length direction, and the bottom ends of the long sides of the "L" -shaped baffle 56 are fixedly connected with the corresponding collecting plates, so that the pair of stripping mechanisms 5 are embedded in the corresponding pair of collecting plates 31, and the length direction of the stripping block 51 is consistent with the groove depth direction of the corresponding mounting groove.
The beneficial technical effects of the invention are embodied in the following aspects:
1. the device of the invention is characterized in that a pair of collecting plates are respectively provided with a first channel, a first dust channel and a second dust channel, an impeller is arranged at a through position, and a suspension blade below the impeller corresponds to the second dust channel; the air inlet of the first channel is covered with the mounting cover, so that the volume of the air inlet cavity is gradually reduced, meanwhile, the first channel is communicated with the inlet of the second dust channel in the collecting plate, the sectional area of the inlet end of the second dust channel is larger than that of the first channel, so that when a vehicle is braked at a high speed or a higher speed, a Venturi effect is formed at the dust inlet of the first channel, brake dust is sucked into the second dust channel, no external force is needed, meanwhile, the impeller is pushed to rotate by airflow in the second dust channel, the impeller rotates to suck dust-containing air in the first dust channel into the second dust channel, meanwhile, the inlet of the first dust channel is a long and narrow arc-shaped groove, the arc-shaped groove plays a role in guiding, and external dust-containing air is guided into the first dust channel;
when the vehicle is braked at a lower speed or is static, the Venturi effect cannot provide enough adsorption force, the brake dust falls to the position near the inlet of the first dust channel under the action of gravity, namely on the arc groove, and when the vehicle is accelerated next time, the brake dust on the arc groove is sucked into the first dust channel along with the action of air flow, so that the brake dust is not easy to diffuse; under the full operating mode of realization vehicle, the collection of braking dust during the braking has improved the collection efficiency of dust.
2. When the device is installed and used, the brake disc corresponding to the lower part of the brake caliper is inserted into the installation groove in a clearance mode, the installation ends of the pair of collecting plates are fixedly connected with the lower end of the brake caliper, and installation is finished.
3. The collecting plate of the device is provided with a third dust channel, and the dust filtering mechanism is correspondingly provided with a fourth dust channel, so that part of dust-containing gas filtered by the cyclone dust collector is subjected to secondary backflow filtering, and on one hand, the dust-containing gas is converged with the gas in the first dust channel and the gas in the second dust channel, the rotation of the impeller is pushed, and the flow of the gas in the dust collecting mechanism is accelerated; on the other hand, partial dust-containing gas flows out through the dust backflow outlet and is filtered by the dust filtering mechanism again, so that the dust removal efficiency of the whole braking dust collecting device is improved.
4. When a vehicle is braked, a hydraulic cylinder of the brake extrudes a pair of pressure plates on a pair of stripping mechanisms through a pressure hole, so that a stripping block extends out of the inner side surface of a corresponding collecting plate and extrudes the brake disc, the peak value in the change process of the friction force can be reduced, the friction force fluctuates in a smaller amplitude, the tangential vibration of the brake disc is weakened to a certain extent, and the braking stability is improved.
Drawings
FIG. 1 is a schematic view of the structure of the apparatus of the present invention.
Fig. 2 is a left side view of fig. 1.
Fig. 3 is a schematic view of the structure of the collection plate on the device.
Fig. 4 is a cross-sectional view of fig. 3.
Fig. 5 is a schematic perspective view of a dust filtering mechanism of the device of the present invention.
Fig. 6 is a cross-sectional view of fig. 5.
Fig. 7 is a sectional view B-B of fig. 6.
Fig. 8 is an exploded view of the peel mechanism on the device of the present invention.
FIG. 9 is a cross-sectional view of a peel mechanism on the device of the present invention.
Fig. 10 is a view showing the installation and use of the device of the present invention.
FIG. 11 is a three-body microcontact physical model.
FIG. 12 is a graph showing the change in friction with the average size of dust diameter.
FIG. 13 is a graph showing a comparison of the effects of the peeling apparatus before and after operation.
Wherein: 1, a brake disc; 2, a brake caliper; 3 a pair of collecting plates; 31 a first channel; 311 a dust inlet; 312 installing a cover; 313 baffle plate; 32 a first dust channel; 321 an arc-shaped groove; 33 a second dust channel; 331 a dust outlet; 332 a baffle plate; 34 an impeller; 35 a third dust channel; 36 pressure ports; 351 dust backflow inlet; 352 dust return outlet; 4 a pair of dust filtering mechanisms; 41 a cyclone dust collector; 42 ash bucket; 411 an inlet of a dust remover; 43 a fourth dust channel; 5 a pair of peeling mechanisms; 51 stripping block; 52, pressing a plate; 53 partition plates; 54 is connected with a spring; 55 a return spring; 56 "L" shaped baffles.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
Examples
Referring to fig. 1 and 2, an apparatus for collecting brake dust of a disc brake for a vehicle includes a pair of collecting plates 3, a pair of dust filtering mechanisms 4, and a pair of peeling mechanisms 5.
The first channel 31 penetrates through the collecting plate, an opening of the first channel 31 corresponding to the outer side of the collecting plate is an air inlet, an opening corresponding to the inner side of the collecting plate is a dust inlet 311, and the air inlet is covered with an installation cover 312; the opening of the mounting cover 312 faces horizontally toward the mounting end of the collecting plate, and when the vehicle is running, the opening of the mounting cover 312 faces in the running direction of the vehicle, so that a large amount of air enters. More than 2 flow baffle plates 313 are arranged in the mounting cover 312, and each flow baffle plate is in a wedge shape with gradually increased thickness, so that the cavity volume of the air inlet cavity is gradually narrowed.
As shown in fig. 3, the vertical section of each collecting plate is L-shaped, the short side of the L-shape corresponds to the inner side of the bottom of the collecting plate, and a pair of short sides of the L-shape on a pair of collecting plates 3 are connected in an involutory manner, so that the opposite inner sides of the pair of collecting plates 3 form a mounting groove; an arc-shaped groove 321 is formed in the L-shaped short edge close to the installation end of the collecting plate, the arc-shaped groove 321 is formed along the outer circumference of the collecting plate, the open end of the arc-shaped groove 321 faces the installation end of the collecting plate, and when a vehicle runs, a large amount of air enters. The arc-shaped groove 321 guides the air containing brake dust into the first dust passage 32.
Referring to fig. 10, the device of the invention is installed on a disc brake, a brake disc 1 corresponding to the lower part of a brake caliper 2 is inserted into an installation groove with a gap, so that installation ends of a pair of collecting plates 3 are fixedly connected with the lower end of the brake caliper 2, and overhanging ends of the pair of collecting plates 3 are fixedly installed with a corresponding pair of dust filtering mechanisms 4.
It should be noted that the disc brake shown in fig. 10 is not particularly limited, and may be any disc brake related to vehicles such as automobiles, commercial vehicles, heavy trucks, buses or rail vehicles, and the like, and it is only necessary to ensure that the entire device and the brake caliper form a relatively closed space in the friction working surface.
Referring to fig. 4, a first channel 31, a first dust channel 32 and a second dust channel 33 are correspondingly formed on the pair of collecting plates 3;
the inlet of the first dust channel 32 is arranged at the bottom of the mounting groove and is a long and narrow arc-shaped groove 321, the outlet of the first dust channel 32 and the second dust channel 33 are communicated in the collecting plate, and the impeller 34 is arranged at the through position, so that the lower suspension of the impeller 34 corresponds to the second dust channel 33,
the outlet of the second dust channel 33 is correspondingly arranged on the end surface of the overhanging end of the collecting plate and is a dust outlet 331, the dust outlet 331 is communicated with the inlet of the corresponding dust filtering mechanism, the inlet of the second dust channel 33 is communicated with the first channel 31 in the collecting plate, and the sectional area of the inlet end of the second dust channel 33 is larger than that of the first channel 31.
The air flow in the first dust channel 32 and the second dust channel 33 pushes the impeller 34 to rotate counterclockwise, accelerates the air flow, and provides an adsorption force against gravity for the brake dust in the first dust channel 32.
When the vehicle is braked at a high vehicle speed or high speed, a venturi effect is formed at the dust inlet 311 of the first passage 31, the first passage 31 forms an air aspirator, and brake dust is sucked into the second dust passage 33 at the dust inlet 311;
when the vehicle is braked or is static at a lower vehicle speed, the Venturi effect cannot provide enough adsorption force, the brake dust falls to the position near the inlet of the first dust channel 32 under the action of gravity, namely on the arc groove 321, and when the vehicle accelerates next time, the brake dust on the arc groove 321 is sucked into the first dust channel 32 along with the action of air flow, so that the brake dust is not easy to diffuse, and the collection efficiency of the brake dust is improved.
A baffle 332 is installed in the second dust channel 33, the length of the baffle 332 is slightly greater than the height of the second dust channel 33 and is inclined towards one side of the dust filtering mechanism, when the dust-containing gas flows towards the dust outlet 331, the baffle 332 is opened under the thrust of the gas flow, and the gas flows normally; otherwise, the damper is closed and gas cannot flow. Brake dust in the dust filter mechanism can be prevented from flowing back into the second dust channel 33.
The collection board that second dust passageway 33 top corresponds runs through and has seted up third dust passageway 35, and third dust passageway 35 and second dust passageway 33 link up in impeller 34 installation department, the import correspondence of third dust passageway 35 is seted up on the terminal surface of collection board overhang end, and is dust backward flow import 351, dust backward flow import 351 and fourth dust passageway 43 intercommunication, the export correspondence of third dust passageway 35 is seted up on the medial surface of the collection board between peeling means and first dust import 311, and is dust backward flow export 352.
Each dust filtering mechanism shown in fig. 5, 6 and 7 includes a rectangular box, one side of the box is fixedly connected to the overhanging end of the corresponding collecting plate, a cyclone 41 is disposed along the height direction in the box, a dust hopper 42 is installed at the lower end of the cyclone 41, and a dust inlet 411 of the cyclone 41 is correspondingly communicated with a dust outlet 331 of the second dust channel 33.
A fourth dust channel 43 is arranged at the upper end of the box body in a penetrating way, the upper pipeline of the cyclone dust collector 41 is communicated with the fourth dust channel 43,
the brake dust-containing gas entering the pair of dust filter means 4 will rotate along the inner wall of the cyclone 41 and move downwards, as the diameter of the inner wall decreases, the centrifugal force increases, the brake dust is thrown to the wall and falls into the hopper 42, and the remaining gas flows in the opposite direction when moving downwards to a certain position. A part of the finally filtered gas flows out through the dust return inlet 351 and is sucked into the second dust channel 33 again, and the other part is discharged to the atmosphere through the fourth dust channel 43. For the pair of dust filter mechanisms 4, the dust hopper 42 is only required to be periodically disassembled and cleaned.
Referring to fig. 8 and 9, each peeling mechanism includes a peeling block 51, a pressing plate 52, and two spacers 53;
the two partition plates 53 are vertically arranged along the length direction of the pressure plate 52, so that a stripping groove is formed in the middle of the pressure plate 52, the strip-shaped stripping block 51 is installed in the stripping groove through a spring mechanism, the pressure plates 52 corresponding to the two sides of the stripping groove are respectively provided with a buffer mechanism, and the pressure holes 37 are respectively formed in the pair of collecting plates 31 corresponding to the pair of pressure plates on the pair of stripping mechanisms 5. The spring mechanism comprises three connecting springs 54 which are uniformly distributed in the stripping groove; the buffer mechanism comprises three return springs 55 and an L-shaped baffle 56, the three return springs 55 are uniformly distributed on the corresponding pressing plates 52 at two sides of the stripping groove, the short sides of the L-shaped baffle 56 are correspondingly pressed at the upper ends of the three return springs 55, the long sides of the L-shaped baffle 56 are vertically distributed at two sides of the length direction of the pressing plates 52, and the bottom ends of the long sides of the L-shaped baffle 56 are fixedly connected with the corresponding collecting plates, so that the stripping mechanisms 5 are embedded in the corresponding collecting plates 31. The end face of the stripping block 51 is flush with the inner side face of the corresponding collecting plate, and the length direction of the stripping block 51 is consistent with the groove depth direction of the corresponding mounting groove.
When the vehicle is braked, the hydraulic cylinder of the brake presses the pressure plate 52 through the pressure hole 37, so that the stripping block 51 protrudes out of the corresponding inner side of the collection plate and presses the brake disc 1.
At this time, the brake dust adsorbed on the inner side surfaces of the pair of collecting plates 31 is peeled off; the return springs 55 are symmetrically distributed on two sides of the stripping block 51, the stripping block 51 is elastically connected with the pressure plate 52 through the connecting spring 54, and the brake disc 1 has a certain weakening effect on tangential vibration caused by braking dust, so that the stripping motion and the brake braking are more stable.
In order to explain the vibration damping action of the release mechanism on the brake disc 1, the cause of the tangential vibration of the brake disc 1 needs to be explained. Referring to fig. 11, a three-body microcontact physical model is established.
Assuming that the particle size distribution function follows a gaussian distribution:
for the three-body contact model, the contact area is divided into two types, i.e. the contact area between the microprotrusions and the contact area between the particle and the surface, wherein the contact area between the particle and the surface can be expressed as:
in the formula:
d＝K1he+K2Xmax
(4)
the contact area between the asperities can be expressed as:
thus, the total tangential force can be expressed as:
the above formula letters are described as follows:
σastandard deviation representing the particle size;
xarepresents the average diameter of all particles;
x represents any particle diameter;
c is a constant;
Hs1、Hs2respectively representing the hardness of surface 1 and surface 2;
ηarepresents threeThe distribution density of the bulk particles;
Anrepresenting the nominal contact area of the braking pair;
Es1aand Es1s2The equivalent elastic modulus of the surface 1 and the particle and the equivalent contact elastic modulus of the surface 1 and the surface 2 are respectively expressed, and the two are only related to material properties;
hea critical value representing the plastic contact between the particles and the braking pair surface;
d represents the distance between the average height of the microprotrusions between surface 1 and surface 2;
Xmaxrepresents the maximum diameter of the particle;
K1，K2is a constant coefficient and satisfies; k1+K2＝1
As1s2Representing the real contact area of the two-body contact model;
τa、τs1s2、τs1arespectively representing the adhesive shear strength, the equivalent shear strength between the surfaces of the braking pair, the particles and the braking
Equivalent shear strength between the secondary surfaces, the three are only related to material performance;
σ represents a root mean square value of the roughness of the contact surface;
β is a measure of spatial distribution;
referring to fig. 12, it can be seen that the magnitude of the frictional force is not a constant value, but varies with the average magnitude of the dust diameter. It is known that the size of the brake dust generated during braking generally varies from a few microns to a dozen microns, thus causing small fluctuations in the friction force, which in turn causes tangential vibrations of the brake disc 1, affecting the stability of the braking.
Referring to fig. 13, the stripping mechanism of the present invention reduces the peak value of the friction force variation process, so that the friction force fluctuates in a smaller amplitude, thereby weakening the tangential vibration of the brake disc 1 to some extent and improving the braking stability.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (9)
1. A device for collecting brake dust of a vehicle disc brake, characterized in that:
the device comprises a pair of arc-shaped collecting plates (3), a pair of dust filtering mechanisms (4) and a pair of stripping mechanisms (5);
the bottoms of the pair of collecting plates (3) are connected in an involutory manner, so that mounting grooves are formed on the opposite inner sides of the pair of collecting plates (3), one end of each collecting plate is a mounting end, the other end of each collecting plate is a cantilever end, and the cantilever ends are fixedly mounted with the corresponding dust filtering mechanisms;
a first channel (31), a first dust channel (32) and a second dust channel (33) are correspondingly formed in the pair of collecting plates (3) respectively;
the first channel (31) penetrates through the collecting plate, an opening of the first channel (31) corresponding to the outer side of the collecting plate is an air inlet, an opening corresponding to the inner side of the collecting plate is a dust inlet (311), the air inlet is covered with an installation cover (312), and an inner cavity of the installation cover (312) is a gradually narrowed air inlet cavity;
the inlet of the first dust channel (32) is arranged at the bottom of the mounting groove and is a long and narrow arc-shaped groove (321), the outlet of the first dust channel (32) and the second dust channel (33) are communicated in the collecting plate, and an impeller (34) is arranged at the through position, so that a lower suspension blade of the impeller (34) corresponds to the second dust channel (33);
the outlet of the second dust channel (33) is correspondingly arranged on the end surface of the overhanging end of the collecting plate and is a dust outlet (331), the dust outlet (331) is communicated with the inlet of the corresponding dust filtering mechanism, the inlet of the second dust channel (33) is communicated with the first channel (31) in the collecting plate, and the sectional area of the inlet end of the second dust channel (33) is larger than that of the first channel (31);
the pair of stripping mechanisms (5) are embedded in the corresponding pair of collecting plates (3), and each stripping mechanism comprises a stripping block (51);
during installation, the brake disc (1) is inserted into the installation groove in a clearance mode, so that the installation ends of the pair of collecting plates (3) and the lower end of the brake caliper (2) are fixedly installed; when the vehicle is braked, the stripping block (51) can extend out of the inner side surface of the corresponding collecting plate and extrude the brake disc (1);
when the vehicle brakes at a higher vehicle speed or a higher speed, brake dust is sucked into the second dust passage (33) from the first dust inlet (311) and the arc-shaped groove (321); when the vehicle is braked or stationary at a relatively low speed, brake dust collects on the arc-shaped groove (321), and when the vehicle is accelerated next time, the brake dust is sucked into the first dust passage (32).
2. A device for collecting vehicle disc brake dust according to claim 1, characterized in that: the cover opening of the mounting cover (312) horizontally faces the mounting end of the collecting plate, so that the cover opening of the mounting cover (312) faces the driving direction of the vehicle, more than 2 flow baffle plates (313) are mounted in the mounting cover (312), each flow baffle plate is in a wedge shape with gradually increased thickness, and the cavity volume of the air inlet cavity is gradually narrowed.
3. A device for collecting vehicle disc brake dust according to claim 1, characterized in that: the vertical section of each collecting plate is L-shaped, the short side of the L shape corresponds to the inner side of the bottom of the collecting plate, and a pair of short sides of the L shape on the pair of collecting plates (3) are connected in an involutory mode, so that the opposite inner sides of the pair of collecting plates (3) form mounting grooves;
an arc-shaped groove (321) is formed in the L-shaped short edge close to the installation end of the collecting plate, the arc-shaped groove (321) is formed along the outer circumference of the collecting plate, and the opening end of the arc-shaped groove (321) faces the installation end of the collecting plate.
4. A device for collecting vehicle disc brake dust according to claim 1, characterized in that: a baffle (332) is arranged in the second dust channel (33), so that brake dust in the dust filtering mechanism can be prevented from flowing back into the second dust channel (33).
5. A device for collecting vehicle disc brake dust according to claim 1, characterized in that: every dust filtering mechanism all includes the box body of cuboid form, and one side of box body and the overhanging end fixed connection of a pair of collecting plate (3) have laid cyclone (41) along the direction of height in the box body, and dust hopper (42) are installed to the lower extreme of cyclone (41), and dust remover import (411) of cyclone (41) and dust outlet (331) of second dust passageway (33) correspond the intercommunication.
6. A device for collecting vehicle disc brake dust according to claim 5, characterized in that: a fourth dust channel (43) is arranged at the upper end part of the box body in a penetrating way, the upper pipeline of the cyclone dust collector (41) is communicated with the fourth dust channel (43),
the collecting plate that second dust passageway (33) top corresponds runs through and has seted up third dust passageway (35), and third dust passageway (35) and second dust passageway (33) link up in impeller (34) installation department, the import correspondence of third dust passageway (35) is seted up on the terminal surface of collecting plate overhang end, and be dust backward flow inlet (351), dust backward flow inlet (351) and fourth dust passageway (43) intercommunication, the export correspondence of third dust passageway (35) is seted up on the medial surface of the collecting plate between peeling means and first dust import (311), and is dust backward flow outlet (352).
7. A device for collecting vehicle disc brake dust according to claim 1, characterized in that: each stripping mechanism comprises a rectangular pressing plate (52) and two clapboards (53);
the two clapboards (53) are vertically arranged along the length direction of the pressing board (52), so that a stripping groove is formed in the middle of the pressing board (52), a strip stripping block (51) is arranged in the stripping groove through a spring mechanism, the pressing boards (52) corresponding to the two sides of the stripping groove are respectively provided with a buffer mechanism,
the spring mechanism comprises three connecting springs (54) uniformly arranged in the stripping groove, so that the stripping block (51) is elastically arranged on the stripping groove.
8. An apparatus for collecting vehicle disc brake dust according to claim 7, characterized in that: pressure holes (37) are respectively formed on the pair of collecting plates (31) corresponding to the pair of pressing plates on the pair of peeling mechanisms (5); when the vehicle brakes, the hydraulic cylinder of the disc brake presses the pressure plate (52) through the pressure hole (37), so that the stripping block (51) extends out of the corresponding inner side surface of the collecting plate and presses the brake disc (1).
9. An apparatus for collecting vehicle disc brake dust according to claim 7, characterized in that: the buffer mechanism comprises three return springs (55) and an L-shaped baffle plate (56), the three return springs (55) are uniformly distributed on the pressing plates (52) corresponding to the two sides of the stripping groove, the short sides of the L-shaped baffle plate (56) are correspondingly pressed at the upper ends of the three return springs (55), the long sides of the L-shaped baffle plate (56) are vertically distributed on the two sides of the length direction of the pressing plates (52), the bottom ends of the long sides of the L-shaped baffle plate (56) are fixedly connected with the corresponding collecting plates, a pair of stripping mechanisms (5) are embedded in the corresponding pair of collecting plates (31), and the length direction of the stripping block (51) is consistent with the groove depth direction of the corresponding mounting groove.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010070350.0A CN111271394B (en) | 2020-01-21 | 2020-01-21 | Device for collecting brake dust of vehicle disc brake |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010070350.0A CN111271394B (en) | 2020-01-21 | 2020-01-21 | Device for collecting brake dust of vehicle disc brake |
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| CN111271394A true CN111271394A (en) | 2020-06-12 |
| CN111271394B CN111271394B (en) | 2021-06-01 |
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| CN202010070350.0A Active CN111271394B (en) | 2020-01-21 | 2020-01-21 | Device for collecting brake dust of vehicle disc brake |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022167200A1 (en) * | 2021-02-05 | 2022-08-11 | Mann+Hummel Gmbh | Filter housing for a brake dust particle filter for a brake disc arrangement |
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| CN111271394B (en) | 2021-06-01 |
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