Parking braking device, parking system and vehicle

Abstract

The utility model relates to a parking braking device, a parking system and a vehicle, and relates to the technical field of vehicle braking. The air breaking brake air chambers are used for being correspondingly arranged on a front axle and a rear axle of the vehicle; an air inlet of the differential valve is communicated with the air storage cylinder through a first pipeline, and an air outlet of the differential valve is communicated with all the air-cut brake air chambers; and an air outlet of the manual control valve is connected with a control port of the differential valve, and the manual control valve is used for driving the differential valve to open or close. The differential valve is controlled to be opened through the manual control valve, the structural stability is high, and due to the characteristics of the differential valve, when the manual control valve is closed, a push rod in a brake air chamber cannot generate secondary acting force on a parking brake cavity by stepping on a foot brake for traveling brake and air-break brake, simultaneous operation of a traveling system and a parking system is prevented, and the service life is prolonged. Forces in the combined spring brake cylinder and the spring brake chamber are overlapped, so that overload of a mechanical transmission element is avoided, and the safety of the structure is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle braking, in particular to a parking brake device, a parking system and a vehicle. Background Art

[0002] The parking brake, commonly called the handbrake, is used to provide resistance to the car when parking, preventing it from rolling away. The parking brake, also known as the handbrake or the parking gear in an automatic transmission, locks the drive shaft or rear wheels. The parking brake has much less force than the driving brake and is only used to prevent the car from rolling away on a slope. The air brake is mostly used in the handbrake system of medium and large vehicles. The handbrake system of this type of vehicle is usually in a constant braking state with a strong spring. When the vehicle is about to move, the driver releases the handbrake, which is an inflation action. A certain air pressure must be reached to push the spring open, that is, to release the handbrake before the vehicle can move.

[0003] In the prior art, for example, patent number CN216684403U discloses a four-wheel parking brake device comprising a parking air reservoir, a driving air reservoir, a relay valve, a quick-release valve, and an air brake chamber. Each of the four wheels of the vehicle utilizes an air brake chamber, wherein the air brake chamber comprises a driving brake chamber and a parking brake chamber. The driving brake chamber is connected to the driving air reservoir via a relay valve and a driving brake valve, and the parking brake chamber is connected to the parking air reservoir via a quick-release valve and a parking brake valve. The present invention utilizes air brakes on all four front and rear wheels of the vehicle, effectively increasing the parking braking torque, enabling the vehicle to be parked stably on steeply sloped roads, improving parking safety and effectively preventing the vehicle from slipping. The quick-release valve accelerates air release, facilitating rapid parking braking. The relay valve shortens braking reaction time, improving braking response, and facilitating driving braking.

[0004] However, if you step on the foot brake when parking, it will generate secondary force on the braking system, which may damage the related structures of the braking system and may affect the safety of the braking system. Utility Model Content

[0005] The present application provides a parking brake device, a parking system and a vehicle, which can solve the problem in the prior art that if the foot brake is stepped on when parking, a secondary force will be generated on the braking system, which may damage the relevant structures of the braking system and may affect the safety of the braking system.

[0006] In a first aspect, an embodiment of the present application provides a parking brake device, comprising:

[0007] A gas cylinder for storing gas;

[0008] A plurality of air brake chambers, each of which is arranged on the front and rear axles of the vehicle;

[0009] A differential valve, the air inlet of which is connected to the air reservoir through a first pipeline, and the air outlet of which is connected to all the air-cut brake chambers;

[0010] The manual valve has an air outlet connected to the control port of the differential valve and is used to drive the differential valve to open or close.

[0011] In one embodiment, the air inlet of the manual valve is connected to the air reservoir through a second pipeline, and is connected to the differential valve through a third pipeline. The manual valve is used to separate the second pipeline and the third pipeline. When the manual valve is opened, the gas in the second pipeline enters the third pipeline through the manual valve and flows into the differential valve. After the differential valve is opened, the gas in the first pipeline passes through the differential valve and flows into the air-cut brake chamber.

[0012] In one embodiment, four air brake chambers are included, and the four air brake chambers are divided into two groups and are correspondingly arranged on the front and rear axles.

[0013] In one embodiment, the two air brake chambers located on the rear axle are connected to the differential valve through corresponding fourth pipelines, and the two air brake chambers located on the front axle are connected to the differential valve through a fifth pipeline and two sixth pipelines. One end of the fifth pipeline is connected to the differential valve, one end of the sixth pipeline is connected to the corresponding air brake chamber, and the other end is connected to the other end of the fifth pipeline.

[0014] In one embodiment, a quick release valve is provided at the connection point between the sixth pipeline and the fifth pipeline, an openable and closable quick release valve exhaust port is provided on the side of the quick release valve close to the front axle, and a quick release valve air supply port is provided on the side away from the front axle, quick release valve interfaces are provided at both ends of the quick release valve, the quick release valve exhaust port is used to exhaust the two air-cut brake chambers located on the front axle, the quick release valve air supply port is connected to the other end of the fifth pipeline, and the quick release valve interface is connected to the other end of the sixth pipeline.

[0015] In one embodiment, the quick release valve air supply port is configured such that when the manual valve is opened, the gas in the first pipeline passes through the differential valve, flows through the fifth pipeline, and then opens, and closes after the manual valve is closed.

[0016] In one embodiment, the two sixth pipelines have the same length.

[0017] In one embodiment, the two fourth pipelines are connected to the differential valve via a three-way joint.

[0018] In a second aspect, an embodiment of the present application further provides a parking system, which includes the above-mentioned parking brake device.

[0019] In a third aspect, an embodiment of the present application further provides a vehicle comprising the above-mentioned parking system.

[0020] The beneficial effects of the technical solutions provided in the embodiments of the present application include:

[0021] When using the parking brake device, the air reservoir is used to store gas, and multiple air brake chambers are correspondingly arranged on the front and rear axles of the vehicle. The air inlet of the differential valve is connected to the air reservoir through a first pipeline, and the air outlet is connected to all the air brake chambers. The air outlet of the manual valve is connected to the control port of the differential valve for driving the differential valve to open or close. Since the air inlet of the differential valve is connected to the air reservoir through the first pipeline, and the air outlet is connected to all the air-cut brake chambers, the air reservoir and the air-cut brake chamber are separated by the differential valve, and the differential valve is controlled to open by the manual valve, the structure has high stability, and due to the characteristics of the differential valve itself, when the manual valve is closed, stepping on the foot brake and performing the service brake will not cause secondary air cutting, and the push rod in the air-cut brake chamber will not generate a secondary force on the parking brake chamber, which can prevent the driving and parking systems from being operated simultaneously, and the overlap of forces in the combined spring brake cylinder and the spring brake chamber, thereby avoiding overload of mechanical transmission components and ensuring the safety of the structure. This solves the problem in the prior art that if the foot brake is stepped on when the vehicle is parked, a secondary force will be generated on the brake system, which may damage the relevant structures of the brake system and affect the safety of the brake system. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0023] Figure 1 This is a structural schematic diagram of an embodiment of a parking brake device of the present utility model.

[0024] In the figure: 1. Air reservoir; 2. Differential valve; 3. Air cut-off brake chamber; 4. Manual valve; 5. First pipeline; 6. Second pipeline; 7. Third pipeline; 8. Fourth pipeline; 9. Fifth pipeline; 10. Sixth pipeline; 20. Quick-release valve; 201. Quick-release valve exhaust port; 202. Quick-release valve air supply port; 203. Quick-release valve interface. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 this application.

[0026] The embodiments of the present application provide a parking brake device, a parking system and a vehicle, which can solve the problem in the prior art that if the foot brake is stepped on when parking, a secondary force will be generated on the braking system, which may damage the relevant structures of the braking system and may affect the safety of the braking system.

[0027] like Figure 1 As shown, on the one hand, the present application provides a parking brake device, which includes:

[0028] A gas cylinder 1, which is used to store gas;

[0029] A plurality of air brake chambers 3, which are respectively arranged on the front and rear axles of the vehicle;

[0030] The differential valve 2 has an air inlet connected to the air reservoir 1 through a first pipeline 5, and an air outlet connected to all air-cut brake chambers 3;

[0031] The manual valve 4 has an air outlet connected to the control port of the differential valve 2 and is used to drive the differential valve 2 to open or close.

[0032] When using the parking brake device, the air reservoir 1 is used to store gas, and multiple air brake chambers 3 are used to be correspondingly arranged on the front and rear axles of the vehicle. The air inlet of the differential valve 2 is connected to the air reservoir 1 through the first pipeline 5, and the air outlet is connected to all the air brake chambers 3. The air outlet of the manual valve 4 is connected to the control port of the differential valve 2 for driving the differential valve 2 to open or close. Since the air inlet of the differential valve 2 is connected to the air reservoir 1 through the first pipeline 5, and the air outlet is connected to all the air brake chambers 3, the air reservoir 1 and the air brake chamber 3 are separated by the differential valve 2, and the opening of the differential valve 2 is controlled by the manual valve 4. The structure has high stability. Due to the characteristics of the differential valve 2 itself, when the manual valve 4 is closed, stepping on the foot brake and performing the service brake will not cause secondary air cutting. The push rod in the air brake chamber 3 will not generate a secondary force on the parking brake chamber, which can prevent the driving and parking systems from being operated simultaneously and the force in the combined spring brake cylinder and the spring brake chamber from overlapping, thereby avoiding overload of the mechanical transmission components and ensuring the safety of the structure. This solves the problem in the prior art that if the foot brake is stepped on when the vehicle is parked, a secondary force will be generated on the brake system, which may damage the related structures of the brake system and affect the safety of the brake system.

[0033] In this example, differential valve 2 also shortens reaction time and pressure buildup time in the truck's braking system. When the brake pedal is depressed, compressed air flows directly from reservoir 1 through differential valve 2 into the brake chamber, bypassing the brake valve. This significantly shortens the brake chamber's charging line and speeds up the chamber's inflation process.

[0034] In this example, a switchable exhaust port is provided on the differential valve 2 , and the exhaust port is used to exhaust the air from the air-off brake chamber 3 .

[0035] like Figure 1 As shown, in some optional embodiments, the air inlet of the manual valve 4 is connected to the air reservoir 1 through the second pipeline 6, and is connected to the differential valve 2 through the third pipeline 7. The manual valve 4 is used to separate the second pipeline 6 and the third pipeline 7. When the manual valve 4 is opened, the gas in the second pipeline 6 enters the third pipeline 7 through the manual valve 4 and flows into the differential valve 2. After the differential valve 2 is opened, the gas in the first pipeline 5 passes through the differential valve 2 and flows into the air brake chamber 3.

[0036] In this embodiment, the air inlet of the manual valve 4 is connected to the air reservoir 1 through the second pipeline 6, and is connected to the differential valve 2 through the third pipeline 7. The manual valve 4 is used to separate the second pipeline 6 and the third pipeline 7. When the manual valve 4 is opened, the gas in the second pipeline 6 enters the third pipeline 7 through the manual valve 4 and flows into the control port of the differential valve 2. After the differential valve 2 is opened, the gas in the first pipeline 5 passes through the differential valve 2 and flows into the air-off brake chamber 3, starting the vehicle. The structure is simple, and the action of opening the differential valve 2 by the manual valve 4 is completed by the gas in the air reservoir 1.

[0037] like Figure 1 As shown, in some optional embodiments, four air brake chambers 3 are included, and the four air brake chambers 3 are divided into two groups and correspondingly arranged on the front and rear axles.

[0038] In this embodiment, the parking brake device includes four air brake chambers 3, which are divided into two groups and correspondingly arranged on the front and rear axles to improve the braking effect and prevent unstable parking on a slope under load conditions.

[0039] like Figure 1 As shown, in some optional embodiments, the two air brake chambers 3 located on the rear axle are connected to the differential valve 2 through the corresponding fourth pipeline 8, and the two air brake chambers 3 located on the front axle are connected to the differential valve 2 through the fifth pipeline 9 and two sixth pipelines 10. One end of the fifth pipeline 9 is connected to the differential valve 2, one end of the sixth pipeline 10 is connected to the corresponding air brake chamber 3, and the other end is connected to the other end of the fifth pipeline 9.

[0040] In this embodiment, the two air brake chambers 3 located on the rear axle are connected to the differential valve 2 through the corresponding fourth pipeline 8, and the two air brake chambers 3 located on the front axle are connected to the differential valve 2 through the fifth pipeline 9 and two sixth pipelines 10. One end of the fifth pipeline 9 is connected to the differential valve 2, one end of the sixth pipeline 10 is connected to the corresponding air brake chamber 3, and the other end is connected to the other end of the fifth pipeline 9, that is, the two sixth pipelines 10 and the end parts of the fifth pipeline 9 are connected at the same position. By connecting to the differential valve 2 through the fifth pipeline 9 and the two fourth pipelines 8, the number of interfaces on the differential valve 2 can be reduced, and pipeline laying is facilitated.

[0041] like Figure 1 As shown, in some optional embodiments, a quick release valve 20 is provided at the connection between the sixth pipeline 10 and the fifth pipeline 9, and an openable and closable quick release valve exhaust port 201 is provided on the side of the quick release valve 20 close to the front axle, and a quick release valve air supply port 202 is provided on the side away from the front axle. Quick release valve interfaces 203 are provided at both ends of the quick release valve 20, and the quick release valve exhaust port 201 is used to exhaust the two air-cut brake chambers 3 located on the front axle. The quick release valve air supply port 202 is connected to the other end of the fifth pipeline 9, and the quick release valve interface 203 is connected to the other end of the sixth pipeline 10.

[0042] In this embodiment, a quick release valve 20 is provided at the connection point between the sixth pipeline 10 and the fifth pipeline 9. The quick release valve 20 is provided with an openable and closable quick release valve exhaust port 201 on the side close to the front axle, and a quick release valve air supply port 202 on the side away from the front axle. Quick release valve interfaces 203 are provided at both ends of the quick release valve 20. The quick release valve exhaust port 201 is used to exhaust the two air brake chambers 3 located on the front axle. The quick release valve air supply port 202 is connected to the other end of the fifth pipeline 9, and the quick release valve interface 203 is connected to the other end of the sixth pipeline 10, which can accelerate the exhaust speed of the two air brake chambers 3 on the front axle side.

[0043] In some optional embodiments, the quick release valve air supply port 202 is configured as follows: when the manual valve 4 is opened, the gas in the first pipeline 5 passes through the differential valve 2, flows through the fifth pipeline 9, and then opens, and closes after the manual valve 4 is closed.

[0044] In this embodiment, the quick release valve air supply port 202 is configured as follows: when the manual valve 4 is opened, the gas in the first pipeline 5 passes through the differential valve 2, flows through the fifth pipeline 9, and then opens, and closes after the manual valve 4 is closed. When the quick release valve air supply port 202 is closed, the quick release valve exhaust port 201 is opened, and the gas in the two air-cutting brake chambers 3 on the front axle side is discharged from the quick release valve exhaust port 201, and the gas in the fifth pipeline 9 is discharged from the exhaust port on the differential valve 2.

[0045] In some optional embodiments, the two sixth pipelines 10 have the same length.

[0046] In this embodiment, the two sixth pipelines 10 have the same length, which can facilitate the speed of gas passing through the two sixth pipelines 10 to be similar, and facilitate the two air-cut-off brake chambers 3 on the front axle side to function synchronously.

[0047] like Figure 1 As shown, in some optional embodiments, the two fourth pipelines 8 are connected to the differential valve 2 through a three-way joint.

[0048] In this embodiment, the two fourth pipelines 8 are connected to the differential valve 2 via a three-way joint, which reduces the number of interfaces on the differential valve 2 and makes connection more convenient.

[0049] like Figure 1 As shown, on one hand, the present application also provides a parking system, which includes the above-mentioned parking brake device.

[0050] When using the parking brake device, the air reservoir 1 is used to store gas, and multiple air brake chambers 3 are used to be correspondingly arranged on the front and rear axles of the vehicle. The air inlet of the differential valve 2 is connected to the air reservoir 1 through the first pipeline 5, and the air outlet is connected to all the air brake chambers 3. The air outlet of the manual valve 4 is connected to the control port of the differential valve 2 for driving the differential valve 2 to open or close. Since the air inlet of the differential valve 2 is connected to the air reservoir 1 through the first pipeline 5, and the air outlet is connected to all the air brake chambers 3, the air reservoir 1 and the air brake chamber 3 are separated by the differential valve 2, and the opening of the differential valve 2 is controlled by the manual valve 4. The structure has high stability. Due to the characteristics of the differential valve 2 itself, when the manual valve 4 is closed, stepping on the foot brake and performing the service brake will not cause secondary air cutting. The push rod in the air brake chamber 3 will not generate a secondary force on the parking brake chamber, which can prevent the driving and parking systems from being operated simultaneously and the force in the combined spring brake cylinder and the spring brake chamber from overlapping, thereby avoiding overload of the mechanical transmission components and ensuring the safety of the structure. This solves the problem in the prior art that if the foot brake is stepped on when the vehicle is parked, a secondary force will be generated on the brake system, which may damage the related structures of the brake system and affect the safety of the brake system.

[0051] In this embodiment, the air inlet of the manual valve 4 is connected to the air reservoir 1 through the second pipeline 6, and is connected to the differential valve 2 through the third pipeline 7. The manual valve 4 is used to separate the second pipeline 6 and the third pipeline 7. When the manual valve 4 is opened, the gas in the second pipeline 6 enters the third pipeline 7 through the manual valve 4 and flows into the control port of the differential valve 2. After the differential valve 2 is opened, the gas in the first pipeline 5 passes through the differential valve 2 and flows into the air-off brake chamber 3, starting the vehicle. The structure is simple, and the action of opening the differential valve 2 by the manual valve 4 is completed by the gas in the air reservoir 1.

[0052] In this embodiment, the parking brake device includes four air brake chambers 3, which are divided into two groups and correspondingly arranged on the front and rear axles to improve the braking effect and prevent unstable parking on a slope under load conditions.

[0053] In this embodiment, the two air brake chambers 3 located on the rear axle are connected to the differential valve 2 through the corresponding fourth pipeline 8, and the two air brake chambers 3 located on the front axle are connected to the differential valve 2 through the fifth pipeline 9 and two sixth pipelines 10. One end of the fifth pipeline 9 is connected to the differential valve 2, one end of the sixth pipeline 10 is connected to the corresponding air brake chamber 3, and the other end is connected to the other end of the fifth pipeline 9, that is, the two sixth pipelines 10 and the end parts of the fifth pipeline 9 are connected at the same position. By connecting to the differential valve 2 through the fifth pipeline 9 and the two fourth pipelines 8, the number of interfaces on the differential valve 2 can be reduced, and pipeline laying is facilitated.

[0054] In this embodiment, a quick release valve 20 is provided at the connection point between the sixth pipeline 10 and the fifth pipeline 9. The quick release valve 20 is provided with an openable and closable quick release valve exhaust port 201 on the side close to the front axle, and a quick release valve air supply port 202 on the side away from the front axle. Quick release valve interfaces 203 are provided at both ends of the quick release valve 20. The quick release valve exhaust port 201 is used to exhaust the two air brake chambers 3 located on the front axle. The quick release valve air supply port 202 is connected to the other end of the fifth pipeline 9, and the quick release valve interface 203 is connected to the other end of the sixth pipeline 10, which can accelerate the exhaust speed of the two air brake chambers 3 on the front axle side.

[0055] In this embodiment, the quick release valve air supply port 202 is configured as follows: when the manual valve 4 is opened, the gas in the first pipeline 5 passes through the differential valve 2, flows through the fifth pipeline 9, and then opens, and closes after the manual valve 4 is closed. When the quick release valve air supply port 202 is closed, the quick release valve exhaust port 201 is opened, and the gas in the two air-cutting brake chambers 3 on the front axle side is discharged from the quick release valve exhaust port 201, and the gas in the fifth pipeline 9 is discharged from the exhaust port on the differential valve 2.

[0056] In this embodiment, the two sixth pipelines 10 have the same length, which can facilitate the speed of gas passing through the two sixth pipelines 10 to be similar, and facilitate the two air-cut-off brake chambers 3 on the front axle side to function synchronously.

[0057] In this embodiment, the two fourth pipelines 8 are connected to the differential valve 2 via a three-way joint, which reduces the number of interfaces on the differential valve 2 and makes connection more convenient.

[0058] like Figure 1 As shown, on the other hand, the present application also provides a vehicle, which includes the above-mentioned parking system.

[0059] When using the parking brake device, the air reservoir 1 is used to store gas, and multiple air brake chambers 3 are used to be correspondingly arranged on the front and rear axles of the vehicle. The air inlet of the differential valve 2 is connected to the air reservoir 1 through the first pipeline 5, and the air outlet is connected to all the air brake chambers 3. The air outlet of the manual valve 4 is connected to the control port of the differential valve 2 for driving the differential valve 2 to open or close. Since the air inlet of the differential valve 2 is connected to the air reservoir 1 through the first pipeline 5, and the air outlet is connected to all the air brake chambers 3, the air reservoir 1 and the air brake chamber 3 are separated by the differential valve 2, and the opening of the differential valve 2 is controlled by the manual valve 4. The structure has high stability. Due to the characteristics of the differential valve 2 itself, when the manual valve 4 is closed, stepping on the foot brake and performing the service brake will not cause secondary air cutting. The push rod in the air brake chamber 3 will not generate a secondary force on the parking brake chamber, which can prevent the driving and parking systems from being operated simultaneously and the force in the combined spring brake cylinder and the spring brake chamber from overlapping, thereby avoiding overload of the mechanical transmission components and ensuring the safety of the structure. This solves the problem in the prior art that if the foot brake is stepped on when the vehicle is parked, a secondary force will be generated on the brake system, which may damage the related structures of the brake system and affect the safety of the brake system.

[0060] In this embodiment, the air inlet of the manual valve 4 is connected to the air reservoir 1 through the second pipeline 6, and is connected to the differential valve 2 through the third pipeline 7. The manual valve 4 is used to separate the second pipeline 6 and the third pipeline 7. When the manual valve 4 is opened, the gas in the second pipeline 6 enters the third pipeline 7 through the manual valve 4 and flows into the control port of the differential valve 2. After the differential valve 2 is opened, the gas in the first pipeline 5 passes through the differential valve 2 and flows into the air-off brake chamber 3, starting the vehicle. The structure is simple, and the action of opening the differential valve 2 by the manual valve 4 is completed by the gas in the air reservoir 1.

[0061] In this embodiment, the parking brake device includes four air brake chambers 3, which are divided into two groups and correspondingly arranged on the front and rear axles to improve the braking effect and prevent unstable parking on a slope under load conditions.

[0062] In this embodiment, the two air brake chambers 3 located on the rear axle are connected to the differential valve 2 through the corresponding fourth pipeline 8, and the two air brake chambers 3 located on the front axle are connected to the differential valve 2 through the fifth pipeline 9 and two sixth pipelines 10. One end of the fifth pipeline 9 is connected to the differential valve 2, one end of the sixth pipeline 10 is connected to the corresponding air brake chamber 3, and the other end is connected to the other end of the fifth pipeline 9, that is, the two sixth pipelines 10 and the end parts of the fifth pipeline 9 are connected at the same position. By connecting to the differential valve 2 through the fifth pipeline 9 and the two fourth pipelines 8, the number of interfaces on the differential valve 2 can be reduced, and pipeline laying is facilitated.

[0063] In this embodiment, a quick release valve 20 is provided at the connection point between the sixth pipeline 10 and the fifth pipeline 9. The quick release valve 20 is provided with an openable and closable quick release valve exhaust port 201 on the side close to the front axle, and a quick release valve air supply port 202 on the side away from the front axle. Quick release valve interfaces 203 are provided at both ends of the quick release valve 20. The quick release valve exhaust port 201 is used to exhaust the two air brake chambers 3 located on the front axle. The quick release valve air supply port 202 is connected to the other end of the fifth pipeline 9, and the quick release valve interface 203 is connected to the other end of the sixth pipeline 10, which can accelerate the exhaust speed of the two air brake chambers 3 on the front axle side.

[0064] In this embodiment, the quick release valve air supply port 202 is configured as follows: when the manual valve 4 is opened, the gas in the first pipeline 5 passes through the differential valve 2, flows through the fifth pipeline 9, and then opens, and closes after the manual valve 4 is closed. When the quick release valve air supply port 202 is closed, the quick release valve exhaust port 201 is opened, and the gas in the two air-cutting brake chambers 3 on the front axle side is discharged from the quick release valve exhaust port 201, and the gas in the fifth pipeline 9 is discharged from the exhaust port on the differential valve 2.

[0065] In this embodiment, the two sixth pipelines 10 have the same length, which can facilitate the speed of gas passing through the two sixth pipelines 10 to be similar, and facilitate the two air-cut-off brake chambers 3 on the front axle side to function synchronously.

[0066] In this embodiment, the two fourth pipelines 8 are connected to the differential valve 2 via a three-way joint, which reduces the number of interfaces on the differential valve 2 and makes connection more convenient.

[0067] In the description of this application, it should be noted that the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application 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 operated in a specific orientation, and therefore cannot be understood as a limitation on this application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0068] It should be noted that, in this application, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any 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 comprising 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. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0069] The foregoing is merely a list of specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features of the present application.

Claims

1. A parking brake device, characterized in that: include: A gas cylinder (1) for storing gas; A plurality of air brake chambers (3), wherein the air brake chambers (3) are used to be correspondingly arranged on the front and rear axles of the vehicle; A differential valve (2), the air inlet of which is connected to the air reservoir (1) via a first pipeline (5), and the air outlet of which is connected to all air-cutting brake chambers (3); A manual valve (4) has an air outlet connected to the control port of the differential valve (2) and is used to drive the differential valve (2) to open or close.

2. A parking brake device according to claim 1, characterized in that: The air inlet of the manual valve (4) is connected to the air reservoir (1) through a second pipeline (6), and is connected to the differential valve (2) through a third pipeline (7). The manual valve (4) is used to separate the second pipeline (6) and the third pipeline (7). When the manual valve (4) is opened, the gas in the second pipeline (6) enters the third pipeline (7) through the manual valve (4) and flows into the differential valve (2). After the differential valve (2) is opened, the gas in the first pipeline (5) passes through the differential valve (2) and flows into the air brake chamber (3).

3. The parking brake device according to claim 1, characterized in that: It comprises four air-off brake chambers (3), which are divided into two groups and are correspondingly arranged on the front and rear axles.

4. A parking brake device according to claim 3, characterized in that: The two air brake chambers (3) located on the rear axle are respectively connected to the differential valve (2) through the corresponding fourth pipeline (8), and the two air brake chambers (3) located on the front axle are connected to the differential valve (2) through the fifth pipeline (9) and two sixth pipelines (10), one end of the fifth pipeline (9) is connected to the differential valve (2), one end of the sixth pipeline (10) is connected to the corresponding air brake chamber (3), and the other end is connected to the other end of the fifth pipeline (9).

5. A parking brake device according to claim 4, characterized in that: A quick release valve (20) is provided at the connection point between the sixth pipeline (10) and the fifth pipeline (9); a quick release valve exhaust port (201) that can be opened and closed is provided on the side of the quick release valve (20) close to the front axle, and a quick release valve air supply port (202) is provided on the side away from the front axle; quick release valve interfaces (203) are provided at both ends of the quick release valve (20); the quick release valve exhaust port (201) is used to exhaust the two air-off brake chambers (3) located on the front axle; the quick release valve air supply port (202) is connected to the other end of the fifth pipeline (9), and the quick release valve interface (203) is connected to the other end of the sixth pipeline (10).

6. A parking brake device according to claim 5, characterized in that: The quick release valve air supply port (202) is configured such that when the manual valve (4) is opened, the gas in the first pipeline (5) passes through the differential valve (2), flows through the fifth pipeline (9), and then opens, and closes after the manual valve (4) is closed.

7. The parking brake device according to claim 5, characterized in that: The two sixth pipelines (10) have the same length.

8. The parking brake device according to claim 4, characterized in that: The two fourth pipelines (8) are connected to the differential valve (2) via a three-way joint.

9. A parking system, characterized in that: The invention comprises a parking brake device according to any one of claims 1 to 8.

10. A vehicle, characterized in that: The invention comprises a parking system as claimed in claim 9.

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