CN111649081A - Explosion-proof brake drum - Google Patents
Explosion-proof brake drum Download PDFInfo
- Publication number
- CN111649081A CN111649081A CN202010401300.6A CN202010401300A CN111649081A CN 111649081 A CN111649081 A CN 111649081A CN 202010401300 A CN202010401300 A CN 202010401300A CN 111649081 A CN111649081 A CN 111649081A
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- China
- Prior art keywords
- brake drum
- shell
- cooling water
- explosion
- brake
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 41
- 239000000498 cooling water Substances 0.000 claims abstract description 35
- 238000001816 cooling Methods 0.000 claims abstract description 16
- 229910052751 metal Inorganic materials 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 9
- 230000003014 reinforcing effect Effects 0.000 claims description 9
- 238000009413 insulation Methods 0.000 claims description 6
- 238000004880 explosion Methods 0.000 abstract description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 10
- 239000002994 raw material Substances 0.000 description 7
- 238000005299 abrasion Methods 0.000 description 6
- 229910000838 Al alloy Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 239000007769 metal material Substances 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 4
- 229910001018 Cast iron Inorganic materials 0.000 description 3
- 238000005452 bending Methods 0.000 description 3
- 238000005266 casting Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
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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
- F16D51/00—Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like
- F16D51/10—Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like shaped as exclusively radially-movable brake-shoes
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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
- F16D65/02—Braking members; Mounting thereof
- F16D65/10—Drums for externally- or internally-engaging 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
- F16D65/78—Features relating to cooling
- F16D65/82—Features relating to cooling for internally-engaging brakes
- F16D65/833—Features relating to cooling for internally-engaging brakes with closed cooling system
-
- 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
- F16D65/78—Features relating to cooling
- F16D2065/782—Features relating to cooling the brake-actuating fluid being used as a coolant
-
- 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
- F16D65/78—Features relating to cooling
- F16D2065/785—Heat insulation or reflection
-
- 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
- F16D65/78—Features relating to cooling
- F16D2065/788—Internal cooling channels
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
The invention discloses an explosion-proof brake drum, which comprises a brake drum, brake shoes and a cooling system, wherein the brake drum comprises a cylindrical shell and a plurality of inner containers fixedly arranged on the inner wall of the shell; the cooling system comprises a plurality of cooling water channels arranged on the brake shoes, one ends of the cooling water channels are communicated with the water outlet pipe, the other ends of the cooling water channels are communicated with the water return pipe, and the water outlet pipe and one end, far away from the cooling water channels, of the water return pipe are respectively communicated with the cooling water tank. The anti-explosion brake drum has long service life.
Description
Technical Field
The invention relates to the technical field of brake drums, in particular to an explosion-proof brake drum.
Background
The automobile drum brake utilizes the brake transmission mechanism to enable the brake shoe to press the brake friction plate on the inner side of the brake drum, so that braking force is generated, wheels are decelerated or the automobile is parked within the shortest distance as required, driving safety is guaranteed, and the automobile is reliable in parking and cannot automatically slide.
The brake drum of the existing internal expanding type drum brake is made of all-metal materials, heat generated by continuous braking is mainly generated in the brake drum, and the brake drum is a part which runs at a high speed and is difficult to take effective cooling measures, so that the brake drum is frequently in a high-temperature state and is easy to crack, break and break, meanwhile, the brake force is weakened or even the brake fails in the high-temperature state, the potential safety hazard is large, and due to the braking requirement, the brake drum is heavy under the structure, the cost is high, the safety is guaranteed as far as possible, the brake drum is scrapped under a smaller abrasion loss, and meanwhile, due to the fact that the abrasion caused by high temperature is intensified, the service life of the brake drum. The existing brake shoe is made of non-all-metal materials, so that the brake shoe is worn quickly, and because an ideal cooling mode is not available, the temperature of the brake shoe is often too high, so that the friction surface is burnt, the brake effect is weakened, and the abrasion of the brake shoe is accelerated.
Disclosure of Invention
The invention aims to provide an explosion-proof brake drum, which aims to solve the problems in the prior art and prolong the service life of the brake drum.
In order to achieve the purpose, the invention provides the following scheme:
the invention provides an explosion-proof brake drum which comprises a brake drum, brake shoes and a cooling system, wherein the brake drum comprises a cylindrical shell and a plurality of inner containers fixedly arranged on the inner wall of the shell, the brake shoes are positioned in the brake drum, the brake shoes comprise a support and a plurality of friction plates fixedly arranged on the support, and the side walls of the friction plates can be in contact with the inner containers; the cooling system comprises a plurality of cooling water channels arranged on the brake shoes, one ends of the cooling water channels are communicated with the water outlet pipe, the other ends of the cooling water channels are communicated with the water return pipe, and the water outlet pipe and one end, far away from the cooling water channels, of the water return pipe are respectively communicated with the cooling water tank.
Preferably, the water outlet pipe is provided with a water pump, the water return pipe is provided with a temperature sensor, the water outlet pipe is communicated with the water outlet of the cooling water tank, and the water return pipe is communicated with the water inlet of the cooling water tank.
Preferably, a heat insulation layer is further sandwiched between the outer shell and the inner container, and the heat insulation layer is hot-pressed on the outer shell or the inner container.
Preferably, the inner container is connected with the shell through a plurality of rivets, a reinforcing ring is further sleeved outside the shell, and the reinforcing ring is fixedly connected with the shell through the rivets.
Preferably, the materials of the friction plate and the outer shell are metals.
Preferably, the cooling water channel and the friction plate are arranged at intervals, and the cooling water channel is fixedly connected with the support.
Compared with the prior art, the invention has the following technical effects:
the anti-explosion brake drum has long service life. The anti-explosion brake drum has the advantages that the traditional integrated cast iron brake drum is innovatively made into a structure with two layers or more than two layers, namely a breakage-proof shell, an anti-explosion shell and a friction inner container (which can be made into a multi-piece type or a single-piece type), a reinforcing ring (which is additionally arranged when the shell strength is insufficient) and a heat-insulating layer (which can cause the loose connection between the shell and the inner container and the deformation of a brake drum assembly when the difference of the thermal expansion coefficients of the shell and the inner container is large and the heat conductivity coefficient of an inner lead is large) can be additionally arranged, and the heat-insulating layer or a double-layer friction inner container containing the heat-insulating layer and the friction layer is required to be additionally arranged between the shell and the inner container at the moment), so that the brake drum is prevented; when the brake drum is worn to the limit and needs to be replaced, the shell of the brake drum (comprising the reinforcing ring) can be directly used for the second time, so that the raw material consumption during the replacement of the brake drum is greatly reduced, the pollution emission is reduced, the cost is extremely low, and only about 30 percent of the original integral casting brake drum is used. The cooling circulation system is added, so that a good cooling and radiating effect can be brought, and the potential safety hazard caused by the attenuation of braking force and even the failure of braking of the original drum brake due to the rise of temperature can be basically solved; the friction part of the brake shoe is guaranteed to work at a good temperature, the service life of the friction plate is prolonged (the service life can be prolonged by about one time), the use cost is reduced, and the emission of pollutants in the use process is reduced. The inner bag chooses for use non-all-metal material, has greatly reduced the weight of brake drum, and when the continuous brake produced heat, non-all-metal thermal conductivity coefficient was low, makes the inner bag intensification low, and the heat of production is few, and the deflection difference that shell and inner bag produced by the coefficient of expansion nonconformity is very little, has guaranteed completely through the connection of third kind medium that does not ftracture between shell and the inner bag.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a first structural schematic diagram of an explosion-proof brake drum according to the present invention;
FIG. 2 is a second structural schematic diagram of the explosion-proof brake drum of the present invention;
FIG. 3 is a schematic structural diagram of a brake drum shell in the explosion-proof brake drum of the invention;
FIG. 4 is a schematic structural diagram of a reinforcing ring in the explosion-proof brake drum of the invention;
wherein: 1-an inner container, 2-an outer shell, 3-rivets, 4-a reinforcing ring, 5-a cooling water channel, 6-a support, 7-a friction plate, 8-a water return pipe, 9-a temperature sensor, 10-a cooling water tank, 11-a water pump and 12-a water outlet pipe.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.
The invention aims to provide an explosion-proof brake drum, which aims to solve the problems in the prior art and prolong the service life of the brake drum.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 1 to 4: the explosion-proof brake drum comprises a brake drum, brake shoes and a cooling system.
The brake drum comprises a cylindrical shell 2 and a plurality of inner containers 1 fixedly arranged on the inner wall of the shell 2, brake shoes are located in the brake drum, in the embodiment, the inner containers 1 are in a multi-piece design, namely, the inner containers 1 with smaller pieces are spliced to form an integral inner container, and the inner containers 1 can also be in a one-piece design in practical application. When the difference between the thermal expansion coefficients of the shell 2 and the inner container 1 is large and the heat conductivity coefficient of the inner lead is large, the connection between the shell 2 and the inner container 1 is loosened and the brake drum assembly deforms, and at the moment, a heat insulation layer needs to be additionally arranged between the shell 2 and the inner container 1 or a double-layer friction inner container 1 containing the heat insulation layer and a friction layer needs to be manufactured. Inner bag 1 is connected with shell 2 through a plurality of rivet 3 in this embodiment, and shell 2 still overlaps outward and is equipped with beaded finish 4, and beaded finish 4 links firmly with shell 2 through rivet 3.
When the shell 2 is manufactured, metal such as steel plates, iron plates or aluminum alloys is used as raw materials, blanking is firstly carried out, then, the metal is cut into a circular ring, then, spinning (or stamping) forming (or manufacturing in parts and then welding forming) is carried out, the metal is processed to the shape size, and meanwhile, small holes in the circumference and the end face are processed. The liner 1 is formed by hot-pressing after selecting a plurality of raw materials which meet the emission regulations and mixing. The reinforcing ring 4 adopts a steel belt, an iron belt or an aluminum alloy belt as raw materials, the materials are discharged, the connector is welded after the roller is rounded, the size is turned to the size, and 20-phi 6.71 holes are processed.
The explosion-proof brake drum of the embodiment has the advantages that the brake drum is divided into the shell 2 and the inner container 1, the inner container 1 and the brake shoe are partially rubbed and worn in actual use, the brake drum is guaranteed not to be cracked, damaged or burst integrally, and the safety problem caused by damage of the brake drum is thoroughly solved; when the brake drum wearing and tearing need be changed to the limit, only need change 1 casing of inner bag, brake drum shell 2 and beaded finish 4 can direct secondary use, raw materials consumption when having greatly reduced the change brake drum, pollution abatement discharges, non-all-metal material is chooseed for use to inner bag 1, the weight of brake drum has greatly been reduced, when the continuous brake generates heat, non-all-metal coefficient of thermal conductivity is low, it is low to make inner bag 1 heat up, the heat of production is few, the deflection difference value that shell 2 and inner bag 1 produced by the inflation coefficient is inconsistent is very little, connect through the third kind of medium and guaranteed completely not ftracture between shell 2 and the inner bag 1.
The brake shoe comprises a support 6 and a plurality of friction plates 7 fixedly arranged on the support 6, and the side walls of the friction plates 7 can be in contact with the liner 1. The friction plate 7 is made of cast iron, a casting round pipe is turned to the width and the arc size of the friction shoe by a numerical control car, a sawing machine or a machining center is cut into three equal parts to the arc length, then a rivet 3 hole is machined by the machining center, or a blank casting in the shape of the friction plate 7 is directly cast and machined to the design size by the machining center, so that the friction plate 7 can be obtained.
The friction plate 7 is made of all-metal, most of heat generated during braking (especially continuous braking) is dissipated through a cooling system, the brake is guaranteed to be always at an ideal temperature, the potential safety hazard of brake force attenuation even brake failure caused by brake heating is solved, meanwhile, the ideal brake component temperature is beneficial to enabling the brake component to be in a good abrasion state, abrasion of the component is reduced, the service life is prolonged, meanwhile, due to the support of the brake shoe framework, the abrasion loss of the existing 10mm all-metal brake shoe plate can be increased to 6-8mm, and the service life is greatly prolonged.
The cooling system comprises a plurality of cooling water channels 5 arranged on the brake shoes, one ends of the cooling water channels 5 are communicated with a water outlet pipe 12, the other ends of the cooling water channels 5 are communicated with a water return pipe 8, and the ends, far away from the cooling water channels 5, of the water outlet pipe 12 and the water return pipe 8 are respectively communicated with a cooling water tank 10. The water outlet pipe 12 is provided with a water pump 11, the water return pipe 8 is provided with a temperature sensor 9 electrically connected with a temperature control switch, the temperature control switch can control the opening and closing of the water pump 11, the water outlet pipe 12 is communicated with a water outlet of the cooling water tank 10, and the water return pipe 8 is communicated with a water inlet of the cooling water tank 10. The cooling water channel 5 and the friction plate 7 are arranged at intervals, and the cooling water channel 5 is fixedly connected with the support 6.
The cooling water channel 5 is made of steel, iron or aluminum alloy square tubes as raw materials, the sawing machine is used for blanking, the bending machine is used for bending a bending inlet to a designed size, steel plates, iron plates or aluminum alloy plates are used as raw materials, blanking, drilling and tapping are carried out, and then the steel plates, the iron plates or the aluminum alloy plates are welded at two ends of the tubes.
The arrangement of the cooling system brings good cooling and heat dissipation effects, and can basically solve the potential safety hazard caused by the attenuation of braking force and even the failure of braking caused by the rise of temperature of the original drum brake; guarantee that the brake shoe friction part works under good temperature, promoted the life of friction disc 7 (can improve about life one time), reduce use cost, reduce the emission of use pollutant, the ground that drenches cooling brake drum and lead to when having avoided the car to go winter freezes, the road surface safety problem of traveling that has also brought from this has been eliminated, the potential safety hazard that the sudden damage of cast iron brake drum that still has avoided the brake drum that present drenching cooling brought and is heated the inequality and lead to brought has been avoided.
The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (6)
1. An explosion-proof brake drum, characterized in that: the brake drum comprises a cylindrical shell and a plurality of inner containers fixedly arranged on the inner wall of the shell, the brake shoe is positioned in the brake drum, the brake shoe comprises a support and a plurality of friction plates fixedly arranged on the support, and the side walls of the friction plates can be in contact with the inner containers; the cooling system comprises a plurality of cooling water channels arranged on the brake shoes, one ends of the cooling water channels are communicated with the water outlet pipe, the other ends of the cooling water channels are communicated with the water return pipe, and the water outlet pipe and one end, far away from the cooling water channels, of the water return pipe are respectively communicated with the cooling water tank.
2. Explosion-proof brake drum according to claim 1, characterized in that: the water outlet pipe is provided with a water pump, the water return pipe is provided with a temperature sensor, the water outlet pipe is communicated with a water outlet of the cooling water tank, and the water return pipe is communicated with a water inlet of the cooling water tank.
3. Explosion-proof brake drum according to claim 1, characterized in that: a heat insulation layer is further clamped between the shell and the inner container, and the heat insulation layer is hot-pressed on the shell or the inner container.
4. Explosion-proof brake drum according to claim 1, characterized in that: the inner container is connected with the shell through a plurality of rivets, a reinforcing ring is further sleeved outside the shell, and the reinforcing ring is fixedly connected with the shell through the rivets.
5. Explosion-proof brake drum according to claim 1, characterized in that: the friction plate and the outer shell are made of metal.
6. Explosion-proof brake drum according to claim 1, characterized in that: the cooling water channel and the friction plate are arranged at intervals, and the cooling water channel is fixedly connected with the support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010401300.6A CN111649081A (en) | 2020-05-13 | 2020-05-13 | Explosion-proof brake drum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010401300.6A CN111649081A (en) | 2020-05-13 | 2020-05-13 | Explosion-proof brake drum |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111649081A true CN111649081A (en) | 2020-09-11 |
Family
ID=72342597
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010401300.6A Pending CN111649081A (en) | 2020-05-13 | 2020-05-13 | Explosion-proof brake drum |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111649081A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1030657A (en) * | 1996-07-16 | 1998-02-03 | Komatsu Forklift Co Ltd | Waterproof structure of drum brake in industrial vehicle |
| CN202017722U (en) * | 2011-04-26 | 2011-10-26 | 李建平 | Brake drum with heat radiating holes |
| CN103038534A (en) * | 2010-06-29 | 2013-04-10 | 泰明顿服务责任有限公司 | Brake shoe for a drum brake |
| CN204458930U (en) * | 2015-03-03 | 2015-07-08 | 河北启安汽车零部件制造有限公司 | Automobile brake drum |
| CN206221550U (en) * | 2016-11-30 | 2017-06-06 | 北京天宜上佳新材料股份有限公司 | A kind of drum brake pair with cooling system |
| CN209856278U (en) * | 2019-01-16 | 2019-12-27 | 隆尧县固城汽车联营附件厂 | High-reliability brake hub for heavy truck |
| CN212407386U (en) * | 2020-05-13 | 2021-01-26 | 吉林大学 | Explosion-proof brake drum |
-
2020
- 2020-05-13 CN CN202010401300.6A patent/CN111649081A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1030657A (en) * | 1996-07-16 | 1998-02-03 | Komatsu Forklift Co Ltd | Waterproof structure of drum brake in industrial vehicle |
| CN103038534A (en) * | 2010-06-29 | 2013-04-10 | 泰明顿服务责任有限公司 | Brake shoe for a drum brake |
| CN202017722U (en) * | 2011-04-26 | 2011-10-26 | 李建平 | Brake drum with heat radiating holes |
| CN204458930U (en) * | 2015-03-03 | 2015-07-08 | 河北启安汽车零部件制造有限公司 | Automobile brake drum |
| CN206221550U (en) * | 2016-11-30 | 2017-06-06 | 北京天宜上佳新材料股份有限公司 | A kind of drum brake pair with cooling system |
| CN209856278U (en) * | 2019-01-16 | 2019-12-27 | 隆尧县固城汽车联营附件厂 | High-reliability brake hub for heavy truck |
| CN212407386U (en) * | 2020-05-13 | 2021-01-26 | 吉林大学 | Explosion-proof brake drum |
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