A new energy vehicle braking device and braking method thereof

Abstract

The present invention relates to the field of automobile braking technology, and discloses a new energy automobile braking device and a braking method thereof, comprising a brake pedal, a pedal spring is fixedly installed at the bottom end of the brake pedal, a brake master cylinder is fixedly connected to one side of the pedal spring, an oil pipe is fixedly connected to one side of the brake master cylinder, a brake wheel cylinder is fixedly connected to the bottom end of the brake wheel cylinder, a brake piston is movably connected to the inside of the brake wheel cylinder, a brake slave shoe is movably connected to one side of the brake piston, a support pin is movably connected to the bottom end of the brake slave shoe, and a friction plate is fixedly connected to the outside of the brake slave shoe. The present invention sets the contact time between the friction plates on both sides of the leading and following shoes and the brake drum, so that the friction plates on the slave shoe side first preliminarily decelerate the car, and then use the friction plates on both sides to rub to stop the car at the same time, thereby reducing the wear of the tire and the ground during the braking process and reducing the discomfort of the passengers.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile braking, and in particular to a braking device and a braking method for a new energy automobile. Background Art

[0002] Since the birth of the car, the vehicle braking system has played a vital role in vehicle safety. In recent years, with the advancement of vehicle technology and the increase in vehicle speed, this importance has become increasingly apparent. There are many types of vehicle braking systems in various forms. The traditional braking system structures mainly include mechanical, pneumatic, hydraulic, and gas-liquid mixed types. Their working principles are basically the same. They all use braking devices to gradually consume the kinetic energy of the vehicle through the friction generated during work to achieve vehicle braking and deceleration, and rely on the friction generated between the tires and the ground to slow down or stop the car.

[0003] However, the existing automobile braking device still has some shortcomings. When the automobile is braking, the rotation directions of the two brake shoes and the automobile brake drum are inconsistent, which makes the service life of the leading shoe much shorter than that of the trailing shoe. When the brake shoe is repaired and replaced, the leading shoe is often seriously worn while the trailing shoe is intact, and the replacement causes waste of the trailing shoe parts; and during the braking process of the automobile, the friction between the friction plate and the brake drum causes the automobile to slow down or stop, and a high heat is generated on the brake drum to form a high temperature, which seriously affects its service life; during the braking process of the existing automobile, due to the short dead time, the tire and the bottom surface are easily worn seriously, and the passengers in the car feel more uncomfortable. Summary of the invention

[0004] In view of the shortcomings of the existing automobile guidance device during use raised in the background technology, the present invention provides a new energy automobile braking device and a braking method thereof, which have the advantages of consistent service life of the leading and following shoes and no accumulation of heat in the brake drum, thereby solving the technical problems raised in the above background technology.

[0005] The present invention provides the following technical solution: a new energy vehicle braking device comprises a brake pedal, wherein a pedal spring is fixedly installed at the bottom end of the brake pedal, one side of the pedal spring is fixedly connected to a brake master cylinder, one side of the brake master cylinder is fixedly connected to an oil pipe, the bottom end of the brake wheel cylinder is fixedly connected to a brake wheel cylinder, a brake piston is movably connected to the inside of the brake wheel cylinder, one side of the brake piston is movably connected to a brake slave shoe, the bottom end of the brake slave shoe is movably connected to a support pin, a friction plate is fixedly connected to the outside of the brake slave shoe, a brake drum is movably connected to the outside of the friction plate, a brake shoe return spring is fixedly installed on the inside of the brake slave shoe, one end of the brake shoe return spring is fixedly connected to a brake leading shoe, a cavity is opened in the middle of the brake leading shoe, and coolant is filled in the cavity, a friction plate push block is movably connected to the outside of the brake leading shoe, and another friction plate is fixedly connected to the outside of the friction plate push block.

[0006] Preferably, the thickness of the friction plate on the side of the brake leading shoe is greater than the thickness of the friction plate on the side of the brake trailing shoe.

[0007] Preferably, the thickness of the friction plate on one side of the friction plate push block protruding from the outer side of the brake leading shoe is smaller than the thickness of the friction plate on the brake following shoe side.

[0008] Preferably, a return spring is installed on the inner side of the friction plate push block so that the friction plate push block is located in the middle position of the brake shoe, and the friction plate push block can move left and right in the horizontal direction.

[0009] Preferably, the volume of the coolant changes with temperature, and the higher the temperature, the larger the volume.

[0010] Preferably, the brake shoe and the coolant can rotate along the support pin.

[0011] A braking method for a new energy vehicle braking device comprises the following steps:

[0012] S1. Press the brake pedal to make the brake oil in the master cylinder flow into the wheel cylinder;

[0013] S2, the brake oil pushes the brake piston to make it push the brake shoe and the brake leading shoe to overcome the brake shoe return spring and open outward;

[0014] S3, the friction plate on the brake shoe side first contacts the brake drum and rubs against it to generate heat;

[0015] S4. The heat on the brake drum is absorbed by the coolant through the brake shoe that contacts it, causing the coolant to expand;

[0016] S5. The vehicle brakes under the friction between the friction plates on both sides of the leading and trailing shoes and the brake drum;

[0017] S6. Release the brake pedal. The brake shoe resets under the action of the brake shoe reset spring and the pedal spring, and the brake oil in the brake wheel cylinder flows back to the brake master cylinder.

[0018] The present invention has the following beneficial effects:

[0019] 1. The present invention sets the contact time between the friction plates on both sides of the leading and trailing shoes and the brake drum, so that the friction plates on the trailing shoe side first decelerate the car preliminarily, and then the friction plates on both sides are used to rub simultaneously to stop the car, thereby reducing the wear between the tire and the ground during braking and reducing the discomfort of passengers.

[0020] 2. The present invention adds coolant into the brake shoe to absorb the heat accumulated on the brake drum due to the friction between the friction plate and the brake drum, thereby increasing the service life of the brake drum.

[0021] 3. The present invention generates friction heat by utilizing the initial deceleration of the friction plate of the trailing shoe, thereby pushing the friction plate on the side of the leading shoe to press against the brake drum for friction braking, thereby reducing the friction intensity of the friction plate on the side of the leading shoe opposite to the direction of the brake drum, making the friction intensity of the friction plates on both sides of the leading and trailing shoes relatively consistent, reducing the waste of the friction plate on the side of the trailing shoe. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a schematic diagram of the braking state of the present invention;

[0024] In the figure: 1. brake pedal; 2. pedal spring; 3. brake master cylinder; 4. oil pipe; 5. brake wheel cylinder; 6. brake piston; 7. brake slave shoe; 8. support pin; 9. friction plate; 10. brake drum; 11. brake shoe return spring; 12. brake leading shoe; 13. coolant; 14. friction plate push block. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] See also Figure 1-2A new energy vehicle braking device comprises a brake pedal 1, a pedal spring 2 is fixedly installed at the bottom end of the brake pedal 1, a brake master cylinder 3 is fixedly connected to one side of the pedal spring 2, an oil pipe 4 is fixedly connected to one side of the brake master cylinder 3, a brake wheel cylinder 5 is fixedly connected to the bottom end of the brake wheel cylinder 5, a brake piston 6 is movably connected inside the brake wheel cylinder 5, a brake slave shoe 7 is movably connected to one side of the brake piston 6, a support pin 8 is movably connected to the bottom end of the brake slave shoe 7, a friction plate 9 is fixedly connected to the outer side of the brake slave shoe 7, a brake drum 10 is movably connected to the outer side of the friction plate 9, a brake shoe return spring 11 is fixedly installed on the inner side of the brake slave shoe 7, one end of the brake shoe return spring 11 is fixedly connected to a brake leading shoe 12, a cavity is opened in the middle of the brake leading shoe 12, and a coolant 13 is filled in the cavity, a friction plate push block 14 is movably connected to the outer side of the brake leading shoe 12, and another friction plate 9 is fixedly connected to the outer side of the friction plate push block 14.

[0027] The total thickness of the friction plate 9 on one side of the brake leading shoe 12 is greater than the thickness of the friction plate 9 on one side of the brake slave shoe 7, so that the friction life of the friction plate 9 on one side of the brake leading shoe 12 is prolonged, and the thickness of the friction plate 9 on one side of the friction plate push block 14 protruding from the outer side of the brake leading shoe 12 is less than the thickness of the friction plate 9 on one side of the brake slave shoe 7. After stepping on the brake pedal 1, the brake oil in the brake pedal 1 flows out into the brake wheel cylinder 5 to push the brake piston 6 to move to both sides, and the brake slave shoe 7 and the brake leading shoe 12 can rotate along the support pin 8, so that the friction plates 9 on both sides of the brake slave shoe 7 and the brake leading shoe 12 are attached to the brake drum 10 outwardly, and the friction plate 9 that first contacts the brake drum 10 is the friction plate 9 on the side of the brake slave shoe 7. The initial deceleration of the car is achieved through the friction between the friction plate 9 on the side of the brake slave shoe 7 and the brake drum 10, thereby avoiding the severe friction between the tire and the bottom surface caused by the sudden braking of the car, extending the service life of the tire, and reducing the discomfort of the passengers when braking.

[0028] A return spring is installed on the inner side of the friction plate push block 14 so that the friction plate push block 14 is located in the middle position of the brake shoe 12, and the friction plate push block 14 can move left and right in the horizontal direction. After the friction plate 9 on one side of the brake shoe 7 rubs against the brake drum 10 for initial deceleration, the heat generated on the brake drum 10 is conducted by the brake shoe 12 and absorbed by the coolant 13. The volume of the coolant 13 changes due to the temperature, and the higher the temperature, the larger the volume, so that the coolant 13 expands due to heat, pushing the friction plate push block 14 outward so that the friction plate 9 on one side of the brake shoe 12 presses the brake drum 10 to brake, further reducing the speed of the car and stopping it, so that the friction force of the brake shoe 7 and the friction plates 9 on both sides of the brake shoe 12 is relatively balanced, avoiding the problem of inconsistent life of the friction plates 9 on both sides caused by the traditional brake device mainly relying on the friction plate 9 on the brake shoe 12 during braking, improving the utilization rate of the friction plate 9 and reducing the waste of the friction plate 9.

[0029] A braking method for a new energy vehicle braking device comprises the following steps:

[0030] S1, step on the brake pedal 1 to make the brake oil in the brake master cylinder 3 flow into the brake wheel cylinder 5;

[0031] S2, the brake oil pushes the brake piston 6 to make it push the brake shoe 7 and the brake leading shoe 12 to overcome the brake shoe return spring 11 and open outward;

[0032] S3, the friction plate 9 on the brake shoe 7 first contacts the brake drum 10 and rubs against it to generate heat;

[0033] S4, the heat on the brake drum 10 is absorbed by the coolant 13 through the brake shoe 12 that contacts later, causing the coolant 13 to expand;

[0034] S5, the vehicle brakes under the friction between the friction plates 9 on both sides of the leading and trailing shoes and the brake drum 10;

[0035] S6. Release the brake pedal 1. The brake shoe is reset under the action of the return spring 11 and the pedal spring 2, and the brake oil in the wheel cylinder 5 flows back to the master cylinder 3.

[0036] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A braking method for a new energy vehicle braking device, the braking device comprising a brake pedal (1), a pedal spring (2) being fixedly mounted at the bottom end of the brake pedal (1), a brake master cylinder (3) being fixedly connected to one side of the pedal spring (2), a fluid pipe (4) being fixedly connected to one side of the brake master cylinder (3), a brake wheel cylinder (5) being fixedly connected to the bottom end of the brake master cylinder (5), a brake piston (6) being movably connected to the inside of the brake wheel cylinder (5), a brake slave shoe (7) being movably connected to one side of the brake piston (6), and a support pin (6) being movably connected to the bottom end of the brake slave shoe (7). 8), the outer side of the brake shoe (7) is fixedly connected to a friction plate (9), the outer side of the friction plate (9) is movably connected to a brake drum (10), the inner side of the brake shoe (7) is fixedly installed with a brake shoe return spring (11), one end of the brake shoe return spring (11) is fixedly connected to a brake leading shoe (12), a cavity is provided in the middle of the brake leading shoe (12), and a coolant (13) is filled in the cavity, the outer side of the brake leading shoe (12) is movably connected to a friction plate push block (14), and the outer side of the friction plate push block (14) is fixedly connected to another friction plate (9); The thickness of the friction plate (9) on one side of the brake leading shoe (12) is greater than the thickness of the friction plate (9) on one side of the brake trailing shoe (7); The thickness of the friction plate (9) on one side of the friction plate push block (14) protruding from the outside of the brake leading shoe (12) is smaller than the thickness of the friction plate (9) on one side of the brake trailing shoe (7); A return spring is installed on the inner side of the friction plate push block (14) so ​​that the friction plate push block (14) is located in the middle of the brake shoe (12), and the friction plate push block (14) can move left and right in the horizontal direction; The volume of the cooling liquid (13) changes due to the influence of temperature, and the higher the temperature, the larger the volume; The brake follower shoe (7) and the brake leading shoe (12) can rotate along the support pin (8); The braking method includes the following steps: S1, stepping on the brake pedal (1) to allow the brake oil in the brake master cylinder (3) to flow into the brake wheel cylinder (5); S2, the brake oil pushes the brake piston (6) to make the brake follower shoe (7) and the brake leading shoe (12) to open outwards against the brake shoe return spring (11); S3, the friction plate (9) on one side of the brake shoe (7) first contacts the brake drum (10) and rubs against it to generate heat; S4, the heat on the brake drum (10) is absorbed by the coolant (13) through the brake shoe (12) that contacts it later, causing the coolant (13) to expand; S5, the vehicle is braked under the friction between the friction plates (9) on both sides of the leading and trailing shoes and the brake drum (10); S6. Release the brake pedal (1), and the brake shoe is reset under the action of the brake shoe reset spring (11) and the pedal spring (2), and the brake oil in the brake wheel cylinder (5) flows back into the brake master cylinder (3).

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