Gas-liquid braking system and method

Abstract

The gas-liquid braking system comprises an axle, braking air chamber parts matched with each other are installed at the two ends of the axle, and the braking air chamber parts are connected with an automobile high-pressure air tank, convert high-pressure aerodynamic force into hydraulic oil power and output the hydraulic oil power to a braking part; the braking part is connected with the braking air chamber part and converts hydraulic oil power into mechanical power to generate braking force, the area of a brake pad is enlarged, meanwhile, a main brake caliper and an auxiliary brake caliper are improved, on one hand, the braking balance is improved, it is guaranteed that the abrasion degrees of the brake pad are the same, on the other hand, the braking force is improved, and a movable brake disc is adopted; when the brake pads on the two sides clamp the brake disc, the brake disc can move transversely, the same friction force is generated between the brake disc and the two brake pads, and therefore it is guaranteed that the abrasion degrees of the two brake pads cannot be different, the brake force generated during braking is higher, and the service life of the brake pads is longer; during replacement, the two brake pads are worn to the same degree, and waste is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle braking, and more particularly to a gas-liquid braking system and method. Background Art

[0002] When the car brakes, air enters the brake chamber from the air intake, and the diaphragm is deformed under the action of air pressure, pushing the push rod, and driving the brake adjusting arm, rotating the brake cam, pressing the brake shoe friction plate against the brake drum to produce braking. At present, basically all brake discs and brake pads use fixed brake discs. The brake pads move toward the brake disc after braking, clamping the brake disc from both sides to generate braking force. In this case, there is a disadvantage. The brake pads on both sides receive different braking forces, resulting in different degrees of wear on the two brake pads. When the brake pad on one side is worn to the maximum allowable thickness, the two brake pads can only be replaced together, which leads to waste.

[0003] There are generally two forms of vehicle braking, namely hydraulic oil brakes and air brakes. Air brakes refer to braking through high-pressure gas, which has a more complex structure and requires an air pressure of 100PSI. Therefore, the engine needs to be started for a period of time in advance to ensure that the air pressure in the gas tank is sufficient. Hydraulic oil brakes have relatively small braking force and slow braking response time, and are not suitable for large vehicles.

[0004] There are generally two types of automobile braking structures, namely drum brakes and disc brakes. Disc brakes have a fast braking response speed, are light in weight, have a simple structure and are easy to maintain, but the friction area of ​​the brake disc is relatively small and the braking force is relatively small, so they are rarely used on large vehicles. Summary of the invention

[0005] One advantage of the present invention is that it provides a gas-liquid brake system and method, which uses a movable brake disc. When the brake pads on both sides clamp the brake disc, the brake disc will move laterally, so that the same friction force is generated between the brake disc and the two brake pads, thereby ensuring that there is no difference in the degree of wear of the two brake pads, the braking force generated during braking is stronger, the service life of the brake pads is longer, and the two brake pads are worn to the same extent when replaced, and no waste is generated.

[0006] One advantage of the present invention is that it provides a floating brake disc, combining the advantages of both air brakes and hydraulic oil brakes. The high-pressure gas does not directly act on the brake disc, so even if the air pressure is insufficient, it will not affect the braking effect. At the same time, the reaction speed is faster, and the braking force is greater than that of oil brakes, and softer than that of air brakes. It is suitable for both large vehicles and small vehicles, and for low-speed and high-speed driving conditions.

[0007] One advantage of the present invention is that it provides a floating brake disc, which enlarges the area of ​​the brake pad and improves the main brake caliper and the auxiliary brake caliper. On the one hand, it improves the balance of the brake and ensures that the brake pads have the same degree of wear. On the other hand, it improves the braking force. Most importantly, the brake disc is subjected to a more balanced force during braking, which not only improves the braking effect but also prevents the brake disc from being damaged.

[0008] To achieve at least one of the above advantages of the present invention, the present invention provides a gas-hydraulic brake system, including an axle, and two ends of the axle are equipped with mutually matching

[0009] The brake air chamber part is connected to the automobile high-pressure gas tank to convert the high-pressure gas power into hydraulic oil power and output it to the brake part;

[0010] The brake part is connected with the brake air chamber part and converts the hydraulic oil power into mechanical power to generate braking force.

[0011] According to an embodiment of the present invention, a brake chassis is included, the brake chassis is fixedly connected to the axle, and the brake chassis is detachably connected to a brake housing;

[0012] Two sets of brake assemblies are symmetrically mounted on the brake housing, and the angle between the two sets of brake assemblies is 180 degrees. The brake assembly includes an oil pump fixedly mounted on the brake housing, a piston rod is telescopically mounted on the main pump, and the other end of the piston rod is connected to the secondary caliper. A brake arm is mounted on the other side of the brake housing, and the other end of the brake arm is fixedly connected to the main caliper. The positions of the main caliper and the secondary caliper correspond to each other.

[0013] A fixed brake pad is detachably mounted on the inner side of the main caliper, and a movable brake pad is detachably mounted on the inner side of the auxiliary caliper. The orthographic projections of the movable brake pad and the fixed brake pad overlap each other. The length of the movable brake pad and the fixed brake pad is 430 mm.

[0014] It also includes a wheel hub, at the end of which a brake disc is slidably mounted, the brake disc being located between a fixed brake pad and a movable brake pad;

[0015] The two oil pumps are both connected with branch oil pipes, and the two branch oil pipes are interconnected and connected with the main oil pipe;

[0016] The brake arm and the brake pan are connected by bolts, and the brake pan and the brake pan are connected by bolts.

[0017] According to an embodiment of the present invention, a through hole is provided in the middle of the brake disc, and a matching connection assembly is provided at the wheel hub and the corresponding portion of the through hole;

[0018] The connecting assembly includes a spline protrusion fixedly arranged on the outer surface of the wheel hub, and a brake groove fixedly arranged on the inner side surface of the brake disc;

[0019] The part where the wheel hub and the brake disc are connected is the connecting part, the spline protrusion is fixedly arranged on the connecting part, and the longitudinal section of the spline protrusion is a trapezoid whose outer width is smaller than the inner width;

[0020] The brake disc is a two-stage structure, the outer side of which is a disc-shaped structure clamped by the brake pad during braking, and the inner side of which is a cylindrical structure connected to the connecting part, and the thickness of the inner side is greater than that of the outer side;

[0021] The thickness of the inner end is smaller than the thickness of the connecting portion;

[0022] The longitudinal cross-sectional shape of the braking groove is the same as that of the spline protrusion.

[0023] According to one embodiment of the present invention, the brake air chamber portion includes a housing, a partition is arranged inside the housing, a gas spring assembly penetrating the partition and a plunger pump assembly connected to the gas spring assembly are arranged inside the housing, and the plunger pump assembly includes a plunger pump and a lower leather cup connected to the plunger pump;

[0024] The shell is divided into a first air chamber, a second air chamber and an oil chamber by a partition plate and a lower leather cup;

[0025] The shell comprises an air chamber upper cover, an air chamber outer shell and an oil pot outer shell which are connected in sequence from top to bottom, and the partition is located in the middle of the air chamber outer shell;

[0026] The housing further comprises an upper clamp and a lower clamp, the air chamber upper cover and the air chamber outer shell are connected via the upper clamp, and the air chamber outer shell and the oil tank outer shell are connected via the lower clamp;

[0027] The gas spring assembly includes a gas spring housing installed on the upper part of the gas chamber upper cover, a gas spring cavity is arranged inside the gas spring housing, a gas spring piston is arranged inside the gas spring cavity, the lower part of the gas spring piston penetrates to the lower part of the gas spring housing and is connected to a connecting rod, and the lower part of the connecting rod penetrates to the lower part of the partition;

[0028] The lower end of the gas spring piston is connected to the middle of the upper leather cup, and the outer edge of the upper leather cup is clamped between the air chamber upper cover and the air chamber shell and connected through the upper clamp;

[0029] The plunger pump assembly includes a plunger pump housing installed on the inner side of the lower part of the oil pot housing, a cavity is arranged inside the plunger pump housing, a plunger pump piston is movably arranged inside the cavity, the upper end of the plunger pump piston is fixedly connected to the middle part of the lower leather cup and the lower end of the connecting rod, the outer edge of the lower leather cup is clamped between the air chamber housing and the oil pot housing and connected through a lower clamp, a through hole is arranged on the plunger pump housing, the cavity is connected with the oil cavity through the through hole, an oil nozzle is arranged at the lower part of the plunger pump housing, and the upper and lower ends of the oil nozzle are respectively connected with the cavity and the main oil pipe;

[0030] An oil port is arranged on the outer shell of the oil pot;

[0031] The air chamber shell is provided with a first air port and a second air port, the first air port is communicated with the first air cavity, and the second air port is communicated with the second air cavity.

[0032] A gas-hydraulic braking method, comprising:

[0033] S01: High-pressure gas enters the second air chamber from the second air port, pushing the plunger pump piston downward to pump the hydraulic oil out and into the main oil pipe;

[0034] S02: Hydraulic oil enters two oil pumps through the main oil pipe and branch oil pipe, pushing the piston rod to drive the auxiliary caliper to move toward the brake disc;

[0035] S03: After the movable brake pad on the auxiliary caliper contacts the brake disc, the brake disc is pushed to slide on the connecting portion until it contacts the fixed brake pad;

[0036] S04: The moving brake pad on the secondary caliper continues to press the brake disc toward the fixed brake pad, and the fixed brake pad and the moving brake pad clamp the brake disc to complete the braking.

[0037] According to one embodiment of the present invention, in step S01, after the driver steps on the brake, the second air port is connected to the brake air pipe, the first air port is disconnected from the brake air pipe and connected to the atmosphere, and high-pressure gas enters the second air cavity through the brake air pipe to produce braking; when the driver releases the brake, the first air port is connected to the brake air pipe, the second air port is disconnected from the brake air pipe and connected to the atmosphere, the brake gas is discharged from the second air port, and the high-pressure gas enters the first air cavity through the brake air pipe to release the brake.

[0038] According to an embodiment of the present invention, after the brake is released, under the action of the centrifugal force generated by the wheel rolling, the brake disc moves in a direction away from the fixed brake pad and loses contact with both the fixed brake pad and the movable brake pad. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a schematic diagram of the structure of the present invention;

[0040] Figure 2 The brake structure of the present invention is shown in FIG. Figure 1 ;

[0041] Figure 3 It is a cross-sectional schematic diagram of the brake disc of the present invention;

[0042] Figure 4 It is a schematic diagram of the structure of the brake air chamber of the present invention;

[0043] Figure 5 It is a cross-sectional schematic diagram of the brake air chamber of the present invention;

[0044] Figure 6 The brake structure of the present invention is shown in FIG. Figure 2 ;

[0045] Figure 7 The brake structure of the present invention is shown in FIG. Figure 3 ;

[0046] Figure 8 It is a cross-sectional schematic diagram of the brake part of the present invention;

[0047] In the accompanying drawings: 1, axle, 2, brake air chamber, 3, brake bottom shell, 4, wheel hub, 5, brake disc, 6, main oil pipe, 7, brake groove, 8, connecting part, 9, spline protrusion, 10, brake arm, 11, auxiliary caliper, 12, brake bottom shell, 13, main caliper, 14, fixed brake pad, 15, movable brake pad, 16, oil pump, 17, gas spring housing, 18, upper clamp, 19, air chamber housing, 20, lower clamp, 21, oil port, 22, oil pot housing, 23, gas spring cavity, 24, gas spring piston, 25, air chamber upper cover, 26, lower leather cup, 27, plunger pump piston, 28, plunger pump housing, 29, connecting rod, 30, first air port, 31, second air port, 32, oil nozzle, 33, upper leather cup. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical scheme and advantages of the present invention more clear, the following will be combined with the appended claims of the present invention. Figure 1 ~Attached Figure 2 , the present invention is described in more detail.

[0049] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles of the present invention defined in the following description can be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not deviate from the spirit and scope of the present invention.

[0050] Those skilled in the art should understand that, in the disclosure of the specification, the orientation or position relationship indicated by the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the orientation or position relationship shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.

[0051] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0052] The invention provides a gas-liquid brake system, including an axle 1, with mutually matching brake air chamber parts 2 installed at both ends of the axle 1, which are connected to the automobile high-pressure gas tank to convert the high-pressure gas power into hydraulic oil power and output it to the brake part; the brake part is connected to the brake air chamber part 2, and converts the hydraulic oil power into mechanical power to generate braking force; it includes a brake chassis 12, the brake chassis 12 is fixedly connected to the axle 1, and the brake chassis 12 is detachably connected to the brake bottom shell 3; two groups of brake components are symmetrically installed on the brake bottom shell 3, and the angle between the two groups of brake components is 180 degrees. The brake assembly includes an oil pump 16 fixedly installed on the brake bottom shell 3, and a piston rod is retractably installed on the main pump, and the other end of the piston rod is connected to the brake bottom shell 3. A secondary caliper 11 is connected, a brake arm 10 is installed on the other side of the brake bottom shell 3, and the other end of the brake arm 10 is fixedly connected to the main caliper 13, and the positions of the main caliper 13 and the secondary caliper 11 correspond to each other; a fixed brake pad 14 is detachably installed on the inner side of the main caliper 13, and a movable brake pad 15 is detachably installed on the inner side of the secondary caliper 11, and the positive projections of the movable brake pad 15 and the fixed brake pad 14 overlap each other, and the length of the movable brake pad 15 and the fixed brake pad 14 is 430 mm; it also includes a wheel hub 4, and a brake disc 5 is slidably installed on the end of the wheel hub 4, and the brake disc 5 is located between the fixed brake pad 14 and the movable brake pad 15; two oil pumps 16 are connected to branch oil pipes, and the two branch oil pipes are connected and connected to the main oil pipe 6; brake arm 10 is connected to the brake pan 3 by bolts, and the brake pan 12 is connected to the brake pan 3 by bolts; a through hole is provided in the middle of the brake disc 5, and the wheel hub 4 and the corresponding part of the through hole are provided with a matching connecting component; the connecting component includes a spline protrusion 9 fixedly arranged on the outer facade of the wheel hub 4, and a brake groove 7 fixedly arranged on the inner side of the brake disc 5; the part where the wheel hub 4 and the brake disc 5 are connected is a connecting part 8, and the spline protrusion 9 is fixedly arranged on the connecting part 8, and the longitudinal section of the spline protrusion 9 is a trapezoid with an outer width smaller than the inner width; the brake disc 5 is a two-stage structure, the outer side of which is a disc-shaped structure clamped by the brake pad during braking, and the inner side end is a cylindrical structure connected to the connecting part 8, and the thickness of the inner side end is greater than the thickness of the outer side end; the thickness of the inner end The thickness of the brake groove 7 is smaller than that of the connecting portion 8; the longitudinal section shape of the brake groove 7 is the same as that of the spline protrusion 9; the brake air chamber portion 2 includes a shell, a partition is provided inside the shell, a gas spring assembly penetrating the partition and a plunger pump assembly connected to the gas spring assembly are provided inside the shell, and the plunger pump assembly includes a plunger pump and a lower leather cup 26 connected to the plunger pump; the shell is divided into a first air chamber, a second air chamber and an oil chamber by the partition and the lower leather cup 26; the shell includes an air chamber upper cover 25, an air chamber outer shell 19 and an oil pot outer shell 22 connected in sequence from top to bottom, and the partition is located in the middle of the air chamber outer shell 19; the shell also includes an upper clamp 18 and a lower clamp 20, the air chamber upper cover 25 and the air chamber outer shell 19 are connected by the upper clamp 18, and the air chamber outer shell 19 and the oil pot outer shell 22 are connected by the lower clamp 20;The gas spring assembly includes a gas spring housing 17 installed on the upper part of the air chamber cover 25, a gas spring cavity 23 is arranged inside the gas spring housing 17, a gas spring piston 24 is arranged inside the gas spring cavity 23, the lower part of the gas spring piston 24 penetrates to the lower part of the gas spring housing 17 and is connected to a connecting rod 29, and the lower part of the connecting rod 29 penetrates to the lower part of the partition; the lower end of the gas spring piston 24 is connected to the middle part of the upper leather bowl 33, the outer edge of the upper leather bowl 33 is clamped between the air chamber cover 25 and the air chamber housing 19 and connected through the upper clamp 18; the plunger pump assembly includes a plunger pump housing 28 installed on the inner side of the lower part of the oil pot housing 22, the plunger pump housing 28 is provided with a cavity, and the inner part of the cavity The upper end of the plunger pump piston 27 is fixedly connected to the middle of the lower leather cup 26 and the lower end of the connecting rod 29. The outer edge of the lower leather cup 26 is sandwiched between the air chamber housing 19 and the oil pot housing 22 and connected through the lower clamp 20. The plunger pump housing 28 is provided with a through hole, and the cavity is connected to the oil cavity through the through hole. The lower part of the plunger pump housing 28 is provided with an oil nozzle 32, and the upper and lower ends of the oil nozzle 32 are respectively connected to the cavity and the main oil pipe 6; the oil pot housing 22 is provided with an oil port 21; the air chamber housing 19 is provided with a first air port 30 and a second air port 31, the first air port 30 is connected to the first air cavity, and the second air port 31 is connected to the second air cavity. ;

[0053] A gas-hydraulic braking method, comprising:

[0054] S01: High-pressure gas enters the second air chamber from the second air port 31, pushing the plunger pump piston 27 to move downward to pump the hydraulic oil out of the hydraulic pump 16 and into the main oil pipe 6;

[0055] S02: The hydraulic oil enters the two oil pumps 16 through the main oil pipe 6 and the branch oil pipe, pushing the piston rod to drive the auxiliary caliper 11 to move toward the brake disc 5;

[0056] S03: After the movable brake pad 15 on the secondary caliper 11 contacts the brake disc 5, the brake disc 5 is pushed to slide on the connecting portion 8 until it contacts the fixed brake pad 14;

[0057] S04: The movable brake pad 15 on the secondary caliper 11 continues to press the brake disc 5 toward the fixed brake pad 14, and the fixed brake pad 14 and the movable brake pad 15 clamp the brake disc 5 to complete the braking.

[0058] In step S01, after the driver steps on the brake, the second air port 31 is connected to the brake air pipe, the first air port 30 is disconnected from the brake air pipe and connected to the atmosphere, and the high-pressure gas enters the second air cavity through the brake air pipe to produce braking; when the driver releases the brake, the first air port 30 is connected to the brake air pipe, the second air port 31 is disconnected from the brake air pipe and connected to the atmosphere, the brake gas is discharged from the second air port 31, and the high-pressure gas enters the first air cavity through the brake air pipe to release the brake; after the brake is released, under the action of the centrifugal force generated by the rolling rotation of the wheel, the brake disc 5 moves in a direction away from the fixed brake pad 14 and loses contact with both the fixed brake pad 14 and the movable brake pad 15.

[0059] Embodiment 1 of the present invention is as follows:

[0060] The braking part includes a brake chassis 3, a brake disc 12 and the brake chassis 3 are connected by bolts, the brake chassis 12 is fixedly connected to the axle 1 and is relatively fixed, a brake disc 5 is installed at the end of the wheel hub 4, and the brake disc 5 is located between the fixed brake pad 14 and the movable brake pad 15. When the car is driving, the wheel hub 4 and the brake disc 5 also rotate synchronously. When braking, the brake disc 5 needs to be clamped by the fixed brake pad 14 and the movable brake pad 15 to generate braking force, so that the brake disc 5 can stop rotating, and the wheel hub 4 also stops rotating at the same time.

[0061] Two sets of brake assemblies are symmetrically installed on the brake pan 3. The angle between the two sets of brake assemblies is degrees, which can evenly distribute the braking force at both ends of the brake disc 5 instead of one end of the transmission brake device, thereby ensuring a more balanced distribution of the braking force. On the one hand, it improves the balance of the brake and ensures that the degree of wear of the brake pads is the same. On the other hand, it increases the braking force. Most importantly, the force on the brake disc 5 is more balanced during braking, which not only has a better braking effect but also protects the brake disc 5 from damage.

[0062] The brake assembly includes an oil pump 16 fixedly mounted on the brake pan 3, two oil pumps 16 are connected to branch oil pipes, the two branch oil pipes are interconnected and connected to the main oil pipe 6, a piston rod is telescopically mounted on the main pump, the other end of the piston rod is connected to a secondary caliper 11, a brake arm 10 is mounted on the other side of the brake pan 3, the other end of the brake arm 10 is fixedly connected to a main caliper 13, the positions of the main caliper 13 and the secondary caliper 11 correspond, a fixed brake pad 14 is detachably mounted on the inner side of the main caliper 13, a movable brake pad 15 is detachably mounted on the inner side of the secondary caliper 11, and the orthographic projections of the movable brake pad 15 and the fixed brake pad 14 overlap with each other.

[0063] During braking, the brake hydraulic oil enters the branch oil pipe from the main oil pipe 6, and then enters the two oil pumps 16 in equal amounts, pushing the piston rod outward by the same distance, pushing the secondary caliper 11 toward the main caliper 13, and the two movable brake pads 15 contact the brake disc 5 at the same time, thereby generating the same braking force.

[0064] The length of the movable brake pad 15 and the fixed brake pad 14 is 430 mm. At the same time, the overall structure has four brake pads, which are evenly arranged at symmetrical positions of the brake disc 5, and can generate greater braking force. At the same time, the braking force is balanced and the braking force is stronger.

[0065] The braking part includes a wheel hub 4, and the part where the wheel hub 4 and the brake disc 5 are connected is a connecting part 8. The connecting part 8 is movably connected to the brake disc 5. A through hole is provided in the middle of the brake disc 5, and the parts corresponding to the wheel hub 4 and the through hole are provided with matching connecting components.

[0066] The connecting assembly includes a spline protrusion 9 fixedly arranged on the outer surface of the wheel hub 4, and a brake groove 7 fixedly arranged on the inner side of the brake disc 5. The wheel hub 4 and the brake disc 5 are connected together by the spline protrusion 9 and the brake groove 7, so that the brake disc 5 can move laterally on the wheel hub 4. When in use, the brake pad on one side is in a fixed state, and the brake pad on the other side is in a movable state. After the movable brake pad moves, it contacts and pushes one side of the brake disc 5, so that the brake disc 5 moves toward the brake pad in the fixed state and contacts it. Then, the brake pads on both sides clamp the brake disc 5 with the same braking force, ensuring that there is no difference in the degree of wear of the two brake pads; after the brake disc 5 moves, compared with the different clamping forces of the brake pads on both sides in the prior art, the clamping forces of the brake pads on both sides in the present application are the same, so that the braking force generated during braking is stronger. In addition, the two brake pads produce the same degree of wear at the same time, and compared with the unilateral wear in the prior art, the wear degree is smaller and the service life of the brake pad is longer. When replaced, the two brake pads are worn to the same extent, and no waste is generated.

[0067] The spline protrusion 9 is fixedly arranged on the connecting portion 8. The longitudinal section of the spline protrusion 9 is a trapezoid with an outer width smaller than an inner width. The longitudinal section shape of the brake groove 7 is the same as the spline protrusion 9, which ensures that the brake disc 5 can only move laterally and cannot produce relative rotation. The braking effect is better and the spline protrusion 9 and the brake groove 7 will not collide during braking.

[0068] The brake disc 5 is a two-stage structure, the outer side of which is a disc-shaped structure clamped by the brake pad during braking, and the inner side end is a cylindrical structure connected to the connecting part 8. The thickness of the inner side end is greater than that of the outer side end, so that when the braking force is generated between the brake groove 7 and the spline protrusion 9, the pressure generated at the contact part is smaller, which is beneficial to extending the service life of the brake disc 5. The thickness of the inner side end is less than that of the connecting part 8.

[0069] The brake air chamber portion 2 includes a shell, which includes an air chamber upper cover 25, an air chamber outer shell 19 and an oil pot outer shell 22 connected in sequence from top to bottom. A partition is provided in the middle of the air chamber outer shell 19. The shell also includes an upper clamp 18 and a lower clamp 20. The air chamber upper cover 25 and the air chamber outer shell 19 are connected by the upper clamp 18, and the air chamber outer shell 19 and the oil pot outer shell 22 are connected by the lower clamp 20, thereby forming the various components into a whole.

[0070] The shell is provided with a gas spring assembly penetrating the partition and a plunger pump assembly connected to the gas spring assembly. The gas spring assembly includes a gas spring housing 17 installed on the upper part of the air chamber cover 25. The gas spring housing 17 is provided with a gas spring cavity 23. The gas spring cavity 23 is provided with a gas spring piston 24. The lower part of the gas spring piston 24 penetrates the lower part of the gas spring housing 17 and is connected with a connecting rod 29. The lower part of the connecting rod 29 penetrates the lower part of the partition. The lower end of the gas spring piston 24 is connected to the middle part of the upper leather cup 33. The outer edge of the upper leather cup 33 is clamped between the air chamber cover 25 and the air chamber. The outer shells 19 are connected by an upper clamp 18, and a first air port 30 and a second air port 31 are provided on the air chamber outer shell 19. The first air port 30 is connected to the first air cavity, and the second air port 31 is connected to the second air cavity. The first air port 30 is filled with gas to increase the air pressure in the first air cavity. When the upper leather cup 33 moves upward, the gas spring piston 24 moves upward, thereby driving the connecting rod 29 to move upward. When the second air port 31 is filled with gas to increase the air pressure in the second air cavity, the lower leather cup 26 moves downward, while the connecting rod 29 moves downward, thereby driving the gas spring piston 24 to move downward.

[0071] The plunger pump assembly includes a plunger pump and a lower leather cup 26 connected to the plunger pump. The plunger pump assembly includes a plunger pump housing 28 installed on the inner side of the lower part of the oil pot housing 22. A cavity is arranged inside the plunger pump housing 28. A plunger pump piston 27 is movably arranged inside the cavity. The upper end of the plunger pump piston 27 is fixedly connected to the middle part of the lower leather cup 26 and the lower end of the connecting rod 29. The outer edge of the lower leather cup 26 is clamped between the air chamber housing 19 and the oil pot housing 22 and connected by the lower clamp 20. A through hole is arranged on the plunger pump housing 28, and the cavity is connected with the oil cavity through the through hole. An oil nozzle 32 is arranged at the lower part of the plunger pump housing 28, and the upper and lower ends of the oil nozzle 32 are respectively connected with the cavity and the oil pipe; an oil port 21 is arranged on the oil pot housing 22.

[0072] When the connecting rod 29 moves downward, it pushes the plunger pump piston 27 downward, thereby pressing the hydraulic oil inside the cavity out and entering the oil chamber of the automobile brake through the oil pipe, causing the brake to brake, which can be used in conjunction with disc brakes or drum brakes.

[0073] When the connecting rod 29 moves upward, it drives the plunger pump piston 27 to move upward. At this time, the hydraulic oil returns to the cavity, reducing the oil pressure in the oil chamber of the brake, thereby releasing the brake.

[0074] The first air port 30 and the second air port 31 are connected to the brake air pipe through a valve. When the driver steps on the brake, the second air port 31 is connected to the brake air pipe, the first air port 30 is disconnected from the brake air pipe and connected to the atmosphere, and the high-pressure gas enters the second air cavity through the brake air pipe to generate braking;

[0075] When the driver releases the brake, the first air port 30 is connected to the brake air pipe, the second air port 31 is disconnected from the brake air pipe and connected to the atmosphere, the brake air is discharged from the second air port 31, and the high-pressure gas enters the first air cavity through the brake air pipe to release the brake.

[0076] The plunger pump is driven by high-pressure gas, which makes the reaction speed faster and shortens the reaction time after stepping on the brake pedal. At the same time, high-pressure gas is used to push the hydraulic oil, so that the braking force is greater than that of simple hydraulic oil brakes, but it is softer than simple air brakes, and the braking comfort is better, and the braking force will not decrease.

[0077] External hydraulic oil enters the oil chamber through the oil port 21 and then enters the cavity through the through hole to replenish the hydraulic oil.

[0078] Embodiment 1 of the present invention is as follows:

[0079] A gas-hydraulic braking method, comprising:

[0080] High-pressure gas enters the second air cavity from the second air port 31, pushing the plunger pump piston 27 downward to pump the hydraulic oil out of the pump 16 and into the main oil pipe 6. When the driver steps on the brake, the second air port 31 is connected to the brake air pipe, the first air port 30 is disconnected from the brake air pipe and connected to the atmosphere, and the high-pressure gas enters the second air cavity through the brake air pipe to produce braking; when the driver releases the brake, the first air port 30 is connected to the brake air pipe, the second air port 31 is disconnected from the brake air pipe and connected to the atmosphere, the brake air is discharged from the second air port 31, and the high-pressure gas enters the first air cavity through the brake air pipe to release the brake; after the brake is released, under the action of the centrifugal force generated by the rolling rotation of the wheel, the brake disc 5 moves in a direction away from the fixed brake pad 14 and loses contact with both the fixed brake pad 14 and the movable brake pad 15.

[0081] The hydraulic oil enters the two oil pumps 16 through the main oil pipe 6 and the branch oil pipes. The oil pressure in the oil pump 16 increases, pushing the piston rod to drive the auxiliary caliper 11 to move toward the brake disc 5. After the movable brake pad 15 on the auxiliary caliper 11 contacts the brake disc 5, it pushes the brake disc 5 to slide on the connecting part 8 until it contacts the fixed brake pad 14. The spacing between the brake disc 5 and the movable brake pad 15 and the fixed brake pad 14 is less than 1 mm. The movable brake pad 15 on the auxiliary caliper 11 continues to squeeze the brake disc 5 onto the fixed brake pad 14. The fixed brake pad 14 and the movable brake pad 15 clamp the brake disc 5 to complete the braking.

[0082] It should be noted that the terms "first, second and third" in the present invention are only used for descriptive purposes and do not indicate any order. They cannot be understood as indicating or implying relative importance. These terms can be interpreted as names.

[0083] It should be understood by those skilled in the art that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The advantages of the present invention have been fully and effectively achieved. The functional and structural principles of the present invention have been demonstrated and explained in the embodiments, and the embodiments of the present invention may be deformed or modified in any way without departing from the principles.

Claims

1. A gas-hydraulic brake system, characterized in that: The axle comprises a wheel shaft, and the two ends of the wheel shaft are equipped with mutually matching wheels. The brake air chamber part is connected to the automobile high-pressure gas tank to convert the high-pressure gas power into hydraulic oil power and output it to the brake part; The brake part is connected with the brake air chamber part and converts the hydraulic oil power into mechanical power to generate braking force.

2. The gas-hydraulic brake system according to claim 1, characterized in that: It comprises a brake chassis, the brake chassis is fixedly connected to the axle, and the brake chassis is detachably connected to a brake bottom housing; Two groups of brake assemblies are symmetrically mounted on the brake housing, and the angle between the two groups of brake assemblies is 180 degrees. The brake assembly includes an oil pump fixedly mounted on the brake housing, a piston rod is telescopically mounted on the main pump, and the other end of the piston rod is connected to a secondary caliper. A brake arm is mounted on the other side of the brake housing, and the other end of the brake arm is fixedly connected to a main caliper, and the positions of the main caliper and the secondary caliper correspond to each other. A fixed brake pad is detachably mounted on the inner side surface of the primary caliper, and a movable brake pad is detachably mounted on the inner side surface of the secondary caliper, the orthographic projections of the movable brake pad and the fixed brake pad overlap each other, and the lengths of the movable brake pad and the fixed brake pad are 430 mm; It also includes a wheel hub, a brake disc is slidably mounted on the end of the wheel hub, and the brake disc is located between the fixed brake pad and the movable brake pad; The two oil pumps are both connected with branch oil pipes, and the two branch oil pipes are communicated and connected with the main oil pipe; The brake arm and the brake bottom shell are connected by bolts, and the brake chassis and the brake bottom shell are connected by bolts.

3. The gas-hydraulic brake system according to claim 2, characterized in that: A through hole is provided in the middle of the brake disc, and a matching connection assembly is provided at the portion of the wheel hub corresponding to the through hole; The connecting assembly includes a spline protrusion fixedly arranged on the outer surface of the wheel hub, and a brake groove fixedly arranged on the inner side of the brake disc; The part where the wheel hub is connected to the brake disc is a connecting part, the spline protrusion is fixedly arranged on the connecting part, and the longitudinal section of the spline protrusion is a trapezoid whose outer width is smaller than the inner width; The brake disc is a two-stage structure, the outer side of which is a disc-shaped structure clamped by the brake pad during braking, and the inner side of which is a cylindrical structure connected to the connecting part, and the thickness of the inner side is greater than that of the outer side; The thickness of the inner end is smaller than the thickness of the connecting portion; The longitudinal cross-sectional shape of the braking groove is the same as that of the spline protrusion.

4. The gas-hydraulic brake system according to claim 2, characterized in that: The brake air chamber portion comprises a shell, a partition is arranged inside the shell, a gas spring assembly penetrating the partition and a plunger pump assembly connected to the gas spring assembly are arranged inside the shell, and the plunger pump assembly comprises a plunger pump and a lower leather cup connected to the plunger pump; The housing is divided into a first air chamber, a second air chamber and an oil chamber by a partition plate and a lower leather cup; The housing comprises an air chamber upper cover, an air chamber outer shell and an oil pot outer shell which are connected in sequence from top to bottom, and the partition is located in the middle of the air chamber outer shell; The housing further comprises an upper clamp and a lower clamp, the air chamber upper cover and the air chamber outer shell are connected via the upper clamp, and the air chamber outer shell and the oil tank outer shell are connected via the lower clamp; The gas spring assembly comprises a gas spring housing mounted on the upper part of the air chamber upper cover, a gas spring cavity is arranged inside the gas spring housing, a gas spring piston is arranged inside the gas spring cavity, the lower part of the gas spring piston penetrates to the lower part of the gas spring housing and is connected to a connecting rod, and the lower part of the connecting rod penetrates to the lower part of the partition; The lower end of the gas spring piston is connected to the middle of the upper leather cup, and the outer edge of the upper leather cup is clamped between the air chamber upper cover and the air chamber shell and connected through an upper clamp; The plunger pump assembly comprises a plunger pump housing installed on the inner side of the lower part of the oil pot housing, a cavity is arranged inside the plunger pump housing, a plunger pump piston is movably arranged inside the cavity, the upper end of the plunger pump piston is fixedly connected to the middle part of the lower leather cup and the lower end of the connecting rod, the outer edge of the lower leather cup is clamped between the air chamber housing and the oil pot housing and connected by a lower clamp, a through hole is arranged on the plunger pump housing, the cavity is connected with the oil cavity through the through hole, an oil nozzle is arranged at the lower part of the plunger pump housing, and the upper and lower ends of the oil nozzle are respectively connected with the cavity and the main oil pipe; The oil pot shell is provided with an oil port; The air chamber housing is provided with a first air port and a second air port, wherein the first air port is communicated with the first air cavity, and the second air port is communicated with the second air cavity.

5. A gas-hydraulic braking method, characterized in that: The gas-hydraulic brake system as claimed in any one of claims 1 to 4 comprises: S01: High-pressure gas enters the second air chamber from the second air port, pushing the plunger pump piston downward to pump the hydraulic oil out and into the main oil pipe; S02: Hydraulic oil enters two oil pumps through the main oil pipe and branch oil pipe, pushing the piston rod to drive the auxiliary caliper to move toward the brake disc; S03: After the movable brake pad on the auxiliary caliper contacts the brake disc, the brake disc is pushed to slide on the connecting portion until it contacts the fixed brake pad; S04: The moving brake pad on the secondary caliper continues to press the brake disc toward the fixed brake pad, and the fixed brake pad and the moving brake pad clamp the brake disc to complete the braking.

6. The gas-hydraulic braking method according to claim 5, characterized in that: In step S01, after the driver steps on the brake, the second air port is connected to the brake air pipe, the first air port is disconnected from the brake air pipe and connected to the atmosphere, and the high-pressure gas enters the second air cavity through the brake air pipe to produce braking; when the driver releases the brake, the first air port is connected to the brake air pipe, the second air port is disconnected from the brake air pipe and connected to the atmosphere, the brake gas is discharged from the second air port, and the high-pressure gas enters the first air cavity through the brake air pipe to release the brake.

7. The gas-hydraulic braking method according to claim 5, characterized in that: After the brake is released, under the action of the centrifugal force generated by the wheel rolling, the brake disc moves away from the fixed brake pad and loses contact with both the fixed brake pad and the movable brake pad.

Images