CN115325056A - Drum brake capable of cooling and test device thereof - Google Patents

Drum brake capable of cooling and test device thereof Download PDF

Info

Publication number
CN115325056A
CN115325056A CN202210893702.1A CN202210893702A CN115325056A CN 115325056 A CN115325056 A CN 115325056A CN 202210893702 A CN202210893702 A CN 202210893702A CN 115325056 A CN115325056 A CN 115325056A
Authority
CN
China
Prior art keywords
brake
air supply
fan
drum
air
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
Application number
CN202210893702.1A
Other languages
Chinese (zh)
Inventor
吴刚
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China Three Gorges University CTGU
Original Assignee
China Three Gorges University CTGU
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by China Three Gorges University CTGU filed Critical China Three Gorges University CTGU
Priority to CN202210893702.1A priority Critical patent/CN115325056A/en
Publication of CN115325056A publication Critical patent/CN115325056A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • 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
    • F16D65/827—Features relating to cooling for internally-engaging brakes with open cooling system, e.g. cooled by air
    • 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
    • F16D66/00—Arrangements for monitoring working conditions, e.g. wear, temperature
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M17/00—Testing of vehicles
    • G01M17/007—Wheeled or endless-tracked vehicles
    • 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
    • F16D66/00—Arrangements for monitoring working conditions, e.g. wear, temperature
    • F16D2066/001—Temperature

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Braking Arrangements (AREA)

Abstract

A kind of temperature-lowering drum brake and its test device, including brake bottom plate, brake block and brake drum, there are air supply outlet and suction opening on the bottom plate of the brake, the air supply outlet is connected with second air supply channel, the second air supply channel is connected with first air supply channel through the connecting ring, there are dirt-blocking boards on the connecting ring, the first air supply channel is connected with air supply fan; the air suction opening is connected with an air suction channel, and the air suction channel is connected with an air suction fan; the lateral part of brake block is equipped with the conducting strip, is equipped with temperature sensor on the conducting strip, and temperature sensor is connected with the temperature controller electricity, and the temperature controller is connected with air supply fan and extraction fan electricity. The air supply device and the air draft device are additionally arranged, the temperature controller is used for controlling the start and stop of the air supply fan and the air draft fan, the temperature sensor is used for checking the temperature of the brake pad, and when the temperature reaches a threshold value, the air supply fan and the air draft fan are started; the air draft device is matched with the air supply device, so that the cooling effect is improved.

Description

Drum brake capable of cooling and test device thereof
Technical Field
The invention belongs to the field of automobile brakes, and particularly relates to a drum brake capable of reducing temperature and a test device thereof.
Background
When the drum brake brakes, heat generated by direct friction between the brake pad and the brake drum is accumulated in the brake, so that the temperature in the brake rises quickly, the brake pad is easy to malfunction due to overhigh temperature, and the danger of vehicle runaway is increased. When the automobile runs, natural wind energy indirectly cools the drum brake through the outer wall of the brake drum, but the cooling effect is poor. At present, there are some patents that start cooling from the inside, such as inventing a drum brake (cn201910466142. X) with a rapid cooling and heat dissipation function, a fan and a water spraying system are adopted to cool the inside of a drum brake, but the fan is not aligned with a brake pad to cool, and the fan is used for throwing water to the inner wall of the brake drum; the utility model relates to an automobile drum brake water spray heat sink (CN 201520247742.4) adopts the water spray to cool down to the drum brake ware, drum brake cooling system (CN 201720596096.1) carries out the jet-propelled cooling to drum brake ware inside through high-pressure gas holder, drum brake air-cooled cooling system (CN 20110150202.3) also adopts built-in fan to cool down to drum brake ware inside, but the fan in these methods is all not direct alignment brake block and brake drum friction surface and dispels the heat, therefore the radiating effect is not good, and the system is complicated, it is higher to go out trouble probability, it is in the brake drum to bring in addition probably with external filth and dust. Therefore, the invention needs to provide a drum brake system capable of reducing the temperature, and the air cooling treatment is carried out in the brake drum by utilizing an external air supply device and an air exhaust device.
Disclosure of Invention
In view of the technical problems in the background art, the drum brake capable of reducing the temperature and the test device thereof provided by the invention are additionally provided with the air supply device and the air exhaust device, the temperature controller is used for controlling the start and stop of the air supply fan and the air exhaust fan, the temperature sensor is used for checking the temperature of the brake pad, and when the temperature reaches the threshold value, the air supply fan and the air exhaust fan are started; the air draft device is matched with the air supply device, so that the cooling effect is improved.
In order to solve the technical problems, the invention adopts the following technical scheme to realize:
a drum brake capable of reducing temperature and a test device thereof comprise a brake bottom plate, a brake pad and a brake drum, wherein the brake bottom plate is provided with an air supply outlet and an air suction opening, the air supply outlet is connected with a second air supply channel, the second air supply channel is connected with a first air supply channel through a connecting ring, the connecting ring is provided with a dirt blocking plate, and the first air supply channel is connected with an air supply fan; the air suction opening is connected with an air suction channel, and the air suction channel is connected with an air suction fan; the side part of the brake pad is provided with a heat conducting sheet, the heat conducting sheet is provided with a temperature sensor, the temperature sensor is electrically connected with a temperature controller, and the temperature controller is electrically connected with the air supply fan and the exhaust fan.
In a preferred scheme, the air supply outlet comprises two symmetrically arranged fan-shaped air supply areas, and the fan-shaped air supply areas correspond to areas where the brake pads are located; and a plurality of arc-shaped openings are formed in each fan-shaped air supply area, air supply covers are arranged outside the two fan-shaped air supply areas, and the air supply covers are connected with the second air supply channel.
In a preferable scheme, the inner side of the brake pad is connected with brake shoes, a brake wheel cylinder and two springs are arranged between the two brake shoes and connected, and ejector rods of the brake wheel cylinder are used for driving the brake shoes to move; the brake shoe is provided with a guide groove which is in sliding fit with a positioning pin, and the positioning pin is connected with the brake bottom plate; the two springs are symmetrically arranged on two sides of the brake wheel cylinder.
In a preferred scheme, the brake system comprises an oil pipe connected with a brake wheel cylinder, the oil pipe is connected with a brake master cylinder, a brake master cylinder ejector rod of the brake master cylinder is connected with a baffle plate, the baffle plate is matched with a self-adjusting connecting rotating wheel, the self-adjusting connecting rotating wheel is in rotating fit with a lever, the lever is hinged with a lever bracket, a pedal is arranged at the end part of the lever, the pedal is matched with an eccentric wheel, the eccentric wheel is driven to rotate by a first motor, and a reset spring is connected to the self-adjusting connecting rotating wheel; the brake drum is connected with a rotating shaft of the second motor through a main shaft and a coupling.
In a preferred scheme, the self-adjusting connecting rotating wheel comprises a main roller connected with the lever and an arc-shaped oscillating bar in rotary fit with the lever, one end of the arc-shaped oscillating bar is connected with the lever through a torsion spring, and the other end of the arc-shaped oscillating bar is provided with an auxiliary roller; the outer end part of the rotating shaft of the main roller is connected with a return spring; the baffle is clamped between the main roller and the auxiliary roller.
In a preferable scheme, the first motor is arranged on the track and is driven by the air cylinder to move.
In the preferred scheme, the brake bottom plate is arranged on a brake base support, an infrared temperature measuring probe is arranged on the brake base support, and the infrared temperature measuring probe is used for monitoring the external temperature of the brake drum.
In a preferred embodiment, the testing method of the testing apparatus for the reducible drum brake includes the following steps:
the method comprises the following steps that firstly, a first motor and a second motor are started, the second motor is used for driving a brake drum to rotate, and the first motor drives an eccentric wheel to rotate; the pedal can be pressed in a reciprocating manner in the rotation process of the eccentric wheel, the rotation of the lever drives the ejector rod of the brake main cylinder to move, the hydraulic pressure in the brake main cylinder changes so as to enable the brake wheel cylinder to act, and the ejector rod of the brake wheel cylinder stretches and retracts to drive the brake shoe to move, so that the continuous braking process is simulated;
in the first step, when the lever rotates, the main roller extrudes the baffle and simultaneously extrudes the ejector rod of the brake main cylinder; when the lever is reset, the lever is reset under the action of the tension of the reset spring, the brake main cylinder ejector rod is pulled back under the action of the auxiliary roller, and the rotatable arc-shaped oscillating rod can achieve the purpose of self-adaptive adjustment and is used for adapting to the change of the lever angle.
Step two, testing is carried out in two conditions: in the first case, the air supply fan and the exhaust fan are not started within a fixed time; when the monitoring value of the temperature sensor reaches a threshold value, the air supply fan and the exhaust fan are not started; in the second situation, in a fixed time period, when the monitoring value of the temperature sensor reaches a threshold value, the air supply fan and the exhaust fan are started to carry out air cooling;
thirdly, the infrared temperature measuring probe is used for monitoring the external temperature of the brake drum on line and verifying the cooling effect of the drum brake; comparing the temperatures measured in case one and case two;
and step four, adjusting the position of the first motor, and repeating the steps from the first step to the third step for testing.
This patent can reach following beneficial effect:
on the basis of the prior art, the air supply device and the air exhaust device are additionally arranged, the temperature controller is used for controlling the on-off of the air supply fan and the air exhaust fan, the temperature sensor is used for checking the temperature of the brake pad, and when the temperature reaches a threshold value, the air supply fan and the air exhaust fan are started. The air draft device is matched with the air supply device, so that the cooling effect is improved. The air supply outlet comprises two symmetrically arranged fan-shaped air supply areas, and the fan-shaped air supply areas correspond to the areas where the brake pads are located; the fan-shaped air supply area is used for increasing the contact area of air and the brake pad and improving the heat dissipation effect.
The test device for the test of the cooled drum brake can simulate not only the process of frequent braking, but also the conditions of different braking force. The cooling effect can be well verified.
Drawings
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
FIG. 1 is a front view of the present invention;
FIG. 2 is a view showing the internal structure of the brake of the present invention;
FIG. 3 is a schematic view of the brake shoe braking of the present invention;
FIG. 4 is a block diagram of a test apparatus for testing a coolable drum brake according to the present invention;
FIG. 5 is a first diagram illustrating the operation of the self-adjusting connecting wheel according to the present invention;
FIG. 6 is a second schematic diagram of the operation of the self-adjusting connecting wheel of the present invention.
In the figure: the brake comprises a brake bottom plate 1, an air supply outlet 101, an air suction opening 102, a brake pad 2, a heat conducting sheet 3, an air supply fan 4, a first air supply channel 5, a connecting ring 6, a dirt blocking plate 7, a second air supply channel 8, an air suction channel 9, an air suction fan 10, a temperature controller 11, a brake drum 12, a temperature sensor 13, an air supply cover 14, a brake shoe 15, a brake wheel cylinder 16, a push rod 17, a guide groove 18, a positioning pin 19, a spring 20, an oil pipe 21, a brake master cylinder 22, a brake master cylinder push rod 23, a self-adjusting connecting rotating wheel 24, a main roller 24.1, an arc-shaped oscillating bar 24.2, an auxiliary roller 24.3, a lever 25, a pedal 26, an eccentric wheel 27, a first motor 28, a return spring 29, a second motor 30, a rail 31, an air cylinder 32, a brake base bracket 33, an infrared temperature measuring probe 34 and a baffle 35.
Detailed Description
A preferable scheme is as shown in fig. 1 to 6, the drum brake capable of reducing temperature comprises a brake bottom plate 1, a brake pad 2 and a brake drum 12, wherein the brake bottom plate 1 is provided with an air supply opening 101 and an air suction opening 102, the air supply opening 101 is connected with a second air supply channel 8, the second air supply channel 8 is connected with a first air supply channel 5 through a connecting ring 6, the connecting ring 6 is provided with a dirt blocking plate 7, and the first air supply channel 5 is connected with an air supply fan 4; the air suction opening 102 is connected with the air suction channel 9, and the air suction channel 9 is connected with the air suction fan 10; the side part of the brake block 2 is provided with a heat conducting sheet 3, the heat conducting sheet 3 is provided with a temperature sensor 13, the temperature sensor 13 is electrically connected with a temperature controller 11, and the temperature controller 11 is electrically connected with the air supply fan 4 and the exhaust fan 10.
On the basis of the prior art, the air supply device is additionally provided and comprises an air supply fan 4, a first air supply channel 5, a connecting ring 6, a dirt blocking plate 7 and a second air supply channel 8, a temperature controller 11 is used for controlling the air supply fan 4 and an exhaust fan 10 to be started and stopped, a temperature sensor 13 is used for detecting the temperature of a brake pad 2, and when the temperature reaches a threshold value, the air supply fan 4 and the exhaust fan 10 are started. The dirt blocking plate 7 is provided with fine grids, so that sundries in air supplied by the air supply fan 4 can be filtered out, and the dirt blocking plate 7 can be drawn out from the connecting ring 6 and cleaned. The second air supply channel 8 is a plastic hose, and the air supply device can blow outside air into the brake drum 12. The air draft device comprises an air draft channel 9 and an air draft fan 10. The air draft channel 9 is a plastic hose, two ends of the air draft channel 9 are respectively connected with the air draft opening 102 of the brake bottom plate 1 and the air draft fan 10, and the air draft fan 10 is controlled by the temperature controller 11. The air extracting device can extract the hot air in the brake drum 12 to the outside. The air draft device is matched with the air supply device, so that the cooling effect is improved.
Further, the air supply opening 101 comprises two symmetrically arranged fan-shaped air supply areas, and the fan-shaped air supply areas correspond to the areas where the brake pads 2 are located; a plurality of arc-shaped openings are formed in each fan-shaped air supply area, air supply covers 14 are arranged outside the two fan-shaped air supply areas, and the air supply covers 14 are connected with the second air supply channel 8. The fan-shaped air supply area is used for increasing the contact area between the air and the brake pad 2 and improving the heat dissipation effect.
Furthermore, the inner side of the brake pad 2 is connected with brake shoes 15, a brake wheel cylinder 16 and two springs 20 are arranged between the two brake shoes 15 and connected, and ejector rods 17 of the brake wheel cylinder 16 are used for driving the brake shoes 15 to move; the brake shoe 15 is provided with a guide groove 18, the guide groove 18 is in sliding fit with a positioning pin 19, and the positioning pin 19 is connected with the brake bottom plate 1; the two springs 20 are symmetrically arranged on both sides of the brake wheel cylinder 16. When the existing drum brake brakes, a brake wheel cylinder supports a brake shoe to two sides by taking a support pin as a center in a hydraulic mode, and a friction plate on the upper surface of the brake shoe is tightly attached to a brake drum, so that the braking effect is realized. However, since the braking force is applied only to the upper end of the brake shoe, the friction plate located at the upper part is inevitably attached to the brake drum more closely, and the abrasion during braking is larger. Under the long-term action, the friction plate is in an unbalanced state that the upper part is seriously abraded and the lower part is slightly abraded. Therefore, the service life of the friction plate is shortened, and the braking effect of the friction plate is reduced. The brake pad 2 of the invention is in uniform contact with the brake drum, thereby not only ensuring uniform abrasion, but also improving the braking effect.
In order to test the performance of the temperature-reducing drum brake, the invention designs a corresponding test device, which comprises an oil pipe 21 connected with a brake wheel cylinder 16, wherein the oil pipe 21 is connected with a brake master cylinder 22, a brake master cylinder ejector rod 23 of the brake master cylinder 22 is connected with a baffle plate 35, the baffle plate 35 is matched with a self-adjusting connecting rotating wheel 24, the self-adjusting connecting rotating wheel 24 is in rotating fit with a lever 25, the lever 25 is hinged with a lever bracket, the end part of the lever 25 is provided with a pedal 26, the pedal 26 is matched with an eccentric wheel 27, the eccentric wheel 27 is driven by a first motor 28 to rotate, and the self-adjusting connecting rotating wheel 24 is connected with a return spring 29; the brake drum 12 is connected to the rotating shaft of the second motor 30 through a spindle and a coupling.
The self-adjusting connecting rotating wheel 24 comprises a main roller 24.1 connected with the lever 25 and an arc-shaped oscillating bar 24.2 in rotating fit with the lever 25, one end of the arc-shaped oscillating bar 24.2 is connected with the lever 25 through a torsion spring, and the other end of the arc-shaped oscillating bar 24.2 is provided with an auxiliary roller 24.3; the outer end part of the rotating shaft of the main roller 24.1 is connected with a return spring 29; the main roller 24.1 and the secondary roller 24.3 sandwich the baffle 35.
As shown in fig. 6, when lever 25 is rotated, primary roller 24.1 presses flap 35 and simultaneously presses master cylinder post 23. When the lever 25 is reset, the lever 25 is returned to the state shown in fig. 5 under the action of the pulling force of the reset spring 29, the brake master cylinder ejector rod 23 can be pulled back under the action of the secondary roller 24.3, and the rotatable arc-shaped oscillating rod 24.2 can achieve the purpose of self-adaptive adjustment to adapt to the change of the angle of the lever 25.
The first motor 28 is arranged on the rail 31, and the first motor 28 is driven by the air cylinder 32 to move.
The brake base plate 1 is arranged on a brake base bracket 33, an infrared temperature measuring probe 34 is arranged on the brake base bracket 33, and the infrared temperature measuring probe 34 is used for monitoring the external temperature of the brake drum 12.
The test method of the test device of the cooling drum type brake comprises the following steps:
step one, a first motor 28 and a second motor 30 are started, wherein the second motor 30 is used for driving the brake drum 12 to rotate, and the first motor 28 drives the eccentric wheel 27 to rotate; the pedal 26 can be pressed in a reciprocating manner in the rotation process of the eccentric wheel 27, the rotation of the lever 25 drives the ejector rod 23 of the brake main cylinder to move, the hydraulic pressure in the brake main cylinder 22 changes so as to enable the brake wheel cylinder 16 to act, and the ejector rod 17 of the brake wheel cylinder 16 stretches and retracts to drive the brake shoe 15 to move, so that the continuous braking process is simulated;
when the lever 25 rotates towards the direction, the main roller 24.1 presses the baffle 35 and simultaneously presses the brake main cylinder ejector rod 23; when the lever 25 is reset, the lever 25 is reset under the action of the pulling force of the reset spring 29, the brake master cylinder ejector rod 23 is pulled back under the action of the auxiliary roller 24.3, and the rotatable arc-shaped oscillating rod 24.2 can achieve the purpose of self-adaptive adjustment and is used for adapting to the change of the angle of the lever 25.
Step two, testing is carried out in two conditions: in the first case, the air supply fan 4 and the exhaust fan 10 are not started within a fixed time period; when the monitoring value of the temperature sensor 13 reaches the threshold value, the air supply fan 4 and the exhaust fan 10 are not started; in the second case, in a fixed time period, when the monitoring value of the temperature sensor 13 reaches a threshold value, the air supply fan 4 and the exhaust fan 10 are started to perform air cooling;
step three, the infrared temperature measuring probe 34 is used for monitoring the external temperature of the brake drum 12 on line and verifying the cooling effect of the cooling drum brake; comparing the temperatures measured in case one and case two;
and step four, adjusting the position of the first motor 28, and repeating the step one to the step three to test.
The above-described embodiments are merely preferred embodiments of the present invention, and should not be construed as limiting the present invention, and the scope of the present invention is defined by the claims, and equivalents including technical features described in the claims. I.e., equivalent alterations and modifications within the scope hereof, are also intended to be within the scope of the invention.

Claims (9)

1. A drum brake capable of reducing temperature, which comprises a brake bottom plate (1), a brake pad (2) and a brake drum (12), and is characterized in that: an air supply outlet (101) and an air suction opening (102) are arranged on the brake bottom plate (1), the air supply outlet (101) is connected with a second air supply channel (8), the second air supply channel (8) is connected with a first air supply channel (5) through a connecting ring (6), a dirt blocking plate (7) is arranged on the connecting ring (6), and the first air supply channel (5) is connected with an air supply fan (4); the air suction opening (102) is connected with the air suction channel (9), and the air suction channel (9) is connected with the air suction fan (10); the side part of the brake block (2) is provided with a heat conducting sheet (3), the heat conducting sheet (3) is provided with a temperature sensor (13), the temperature sensor (13) is electrically connected with a temperature controller (11), and the temperature controller (11) is electrically connected with the air supply fan (4) and the exhaust fan (10).
2. A reducible drum brake according to claim 1, characterized in that: the air supply outlet (101) comprises two symmetrically arranged fan-shaped air supply areas, and the fan-shaped air supply areas correspond to the areas where the brake pads (2) are located; a plurality of arc-shaped openings are formed in each fan-shaped air supply area, air supply covers (14) are arranged outside the two fan-shaped air supply areas, and the air supply covers (14) are connected with the second air supply channel (8).
3. A reducible drum brake according to claim 2, characterized in that: the inner side of the brake pad (2) is connected with brake shoes (15), a brake wheel cylinder (16) is arranged between the two brake shoes (15) and connected with two springs (20), and ejector rods (17) of the brake wheel cylinder (16) are used for driving the brake shoes (15) to move; a guide groove (18) is formed in the brake shoe (15), the guide groove (18) is in sliding fit with a positioning pin (19), and the positioning pin (19) is connected with the brake bottom plate (1); the two springs (20) are symmetrically arranged on two sides of the brake wheel cylinder (16).
4. A testing apparatus for a reducible drum brake actuator as defined in claim 3, wherein: the brake system comprises an oil pipe (21) connected with a brake wheel cylinder (16), wherein the oil pipe (21) is connected with a brake master cylinder (22), a brake master cylinder ejector rod (23) of the brake master cylinder (22) is connected with a baffle plate (35), the baffle plate (35) is matched with a self-adjusting connecting rotating wheel (24), the self-adjusting connecting rotating wheel (24) is in rotating fit with a lever (25), the lever (25) is hinged with a lever bracket, the end part of the lever (25) is provided with a pedal (26), the pedal (26) is matched with an eccentric wheel (27), the eccentric wheel (27) is driven to rotate by a first motor (28), and the self-adjusting connecting rotating wheel (24) is connected with a return spring (29); the brake drum (12) is connected with a rotating shaft of a second motor (30) through a main shaft and a coupling.
5. The testing apparatus of a reducible drum brake actuator as defined in claim 4, wherein: the self-adjusting connecting rotating wheel (24) comprises a main roller (24.1) connected with the lever (25) and an arc-shaped swing rod (24.2) in rotating fit with the lever (25), one end of the arc-shaped swing rod (24.2) is connected with the lever (25) through a torsion spring, and the other end of the arc-shaped swing rod (24.2) is provided with an auxiliary roller (24.3); the outer end part of the rotating shaft of the main roller (24.1) is connected with a return spring (29); the main roller (24.1) and the auxiliary roller (24.3) clamp the baffle (35) in the middle.
6. A testing apparatus for a reducible drum brake actuator as defined in claim 4, wherein: the first motor (28) is arranged on the rail (31), and the first motor (28) is driven by the air cylinder (32) to move.
7. A testing apparatus for a reducible drum brake actuator as defined in claim 4, wherein: the brake bottom plate (1) is arranged on a brake base support (33), an infrared temperature measuring probe (34) is arranged on the brake base support (33), and the infrared temperature measuring probe (34) is used for monitoring the external temperature of the brake drum (12).
8. A testing method of a testing apparatus for a reducible drum brake actuator as set forth in claim 7, characterized by comprising the steps of:
step one, a first motor (28) and a second motor (30) are started, the second motor (30) is used for driving a brake drum (12) to rotate, and the first motor (28) drives an eccentric wheel (27) to rotate; the pedal (26) can be pressed in a reciprocating manner in the rotation process of the eccentric wheel (27), the lever (25) rotates to drive the ejector rod (23) of the brake main cylinder to move, the hydraulic pressure in the brake main cylinder (22) changes to enable the brake wheel cylinder (16) to act, the ejector rod (17) of the brake wheel cylinder (16) stretches and retracts to drive the brake shoe (15) to move, and therefore the continuous braking process is simulated;
step two, testing is carried out in two conditions: in the first situation, the air supply fan (4) and the exhaust fan (10) are not started within a fixed time period; when the monitoring value of the temperature sensor (13) reaches a threshold value, the air supply fan (4) and the exhaust fan (10) are not started; in the second situation, in a fixed time period, when the monitoring value of the temperature sensor (13) reaches a threshold value, the air supply fan (4) and the air extraction fan (10) are started to perform air cooling;
thirdly, the infrared temperature measuring probe (34) is used for monitoring the external temperature of the brake drum (12) on line and verifying the cooling effect of the drum brake capable of cooling; comparing the temperatures measured in case one and case two;
and step four, adjusting the position of the first motor (28), and repeating the step one to the step three for testing.
9. The testing method of a testing apparatus for a reducible drum brake actuator as set forth in claim 8, characterized in that: in the first step, when the lever (25) rotates, the main roller (24.1) extrudes the baffle (35) and simultaneously extrudes the brake master cylinder ejector rod (23); when the lever (25) is reset, the lever (25) is reset under the action of the pulling force of the reset spring (29), the brake master cylinder ejector rod (23) is pulled back under the action of the auxiliary roller (24.3), and the rotatable arc-shaped swing rod (24.2) can achieve the purpose of self-adaptive adjustment and is used for adapting to the change of the angle of the lever (25).
CN202210893702.1A 2022-07-27 2022-07-27 Drum brake capable of cooling and test device thereof Pending CN115325056A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210893702.1A CN115325056A (en) 2022-07-27 2022-07-27 Drum brake capable of cooling and test device thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210893702.1A CN115325056A (en) 2022-07-27 2022-07-27 Drum brake capable of cooling and test device thereof

Publications (1)

Publication Number Publication Date
CN115325056A true CN115325056A (en) 2022-11-11

Family

ID=83919752

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210893702.1A Pending CN115325056A (en) 2022-07-27 2022-07-27 Drum brake capable of cooling and test device thereof

Country Status (1)

Country Link
CN (1) CN115325056A (en)

Similar Documents

Publication Publication Date Title
CN104819227B (en) Grading system dynamic formula ceramic base brake block system
CN113097629B (en) New energy automobile battery heat abstractor based on water cooling principle
CN107225113A (en) A kind of automobile engine cleaning device with minisize pick-up head
CN109064757A (en) A kind of Car license recognition intelligent integrated machine improving practicability
CN115325056A (en) Drum brake capable of cooling and test device thereof
CN109378424A (en) A kind of new energy car battery group air cooling equipment
CN113958398B (en) Cooling device for ship engine
CN115811178A (en) New energy automobile driving kinetic energy conversion electric energy device
CN107597726A (en) One kind building monitoring dust arrester of airborne dust noise monitor first
CN114193681A (en) Cooling device is used in bellows production
CN109128764A (en) radiator core assembling machine
CN107246837A (en) A kind of brake clutch piece roughness detection equipments
CN110514456B (en) Intelligent detection equipment for skid resistance of automobile tire
CN115789144A (en) Brake pad wear condition detection device
CN214722899U (en) A grinding device for synthetic leather production
CN210751459U (en) Pull plate device of chamber type filter press
CN112230745A (en) Efficient heat dissipation auxiliary mechanism for computer host based on effective dust prevention
CN112325547B (en) Cooling device for mechanical equipment with good cooling effect
CN114459173A (en) Air source heat pump
CN209117224U (en) Automobile environment-protection exhaust pollution analyte detection chassis dynamometer safety device
CN206966202U (en) A kind of automobile engine cleaning device with minisize pick-up head
CN213714709U (en) Rail transit brake control device testing arrangement
CN213262345U (en) Brake block cooling device for passenger car brake test platform
CN205417562U (en) Automobile body side belt cleaning device of reciprocating type car washer
CN216525941U (en) Environment-controlled detection equipment suitable for 160km/h rail transit at speed per hour

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination