Parking brake valve assembly and tractor with same

Abstract

The utility model discloses a parking brake valve assembly and a vehicle with the parking brake valve assembly, the parking brake valve assembly comprises a first valve body, a second valve body, a third valve body, a fourth valve body and a fifth valve body, the upstream of the first valve body is connected with an air source; the second valve body is connected to the downstream of the first valve body, and a first flow path is formed in the direction from the first valve body to the second valve body; the first relay valve is connected to the downstream of the first valve body and connected with the second valve body in parallel, and the first valve body forms a second flow path in the direction of the first relay valve; one end of the bypass valve is connected to an inlet of the first relay valve, and the other end of the bypass valve is connected to an outlet of the first relay valve; and the main vehicle parking air chamber is connected to the downstream of the first relay valve, and main vehicle parking is relieved when the air pressure of the parking air chamber reaches the main vehicle preset air pressure. The parking brake valve assembly has the advantages of being simple and compact in structure, light in weight, capable of reducing failure risks and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to a parking brake valve assembly and a tractor with the same. Background Art

[0002] As the domestic heavy-duty truck market matures, tractor drivers have increasingly higher requirements for the comfort and convenience of trucks. Therefore, the electronic parking function has become a commonly used configuration item for tractors.

[0003] The parking brake valve assembly in the related art requires separate parking control for the main vehicle and trailer, and requires numerous valve bodies for control. The large number of valve bodies not only takes up space, but also makes it difficult to reduce the weight of the entire vehicle. In addition, when some of the valve bodies fail, the increase in air pressure in the parking air chamber will cause the risk of parking failure. Utility Model Content

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a parking brake valve assembly having advantages such as a simplified and compact structure, lightweight, and reduced failure risk.

[0005] The utility model also provides a tractor with a parking brake valve assembly.

[0006] To achieve the above-mentioned purpose, according to an embodiment of the present utility model, a parking brake valve assembly is proposed, including: a first valve body, the upstream of the first valve body is connected to an air source; a second valve body, the second valve body is connected to the downstream of the first valve body, the first valve body forms a first flow path toward the second valve body; a first relay valve, the first relay valve is connected to the downstream of the first valve body and in parallel with the second valve body, the first valve body forms a second flow path toward the first relay valve; a bypass valve, one end of the bypass valve is connected to the inlet of the first relay valve and the other end is connected to the outlet of the first relay valve; a main vehicle parking air chamber, the main vehicle parking air chamber is connected downstream of the first relay valve, and the main vehicle parking is released when the air pressure of the main vehicle parking air chamber reaches the preset air pressure of the main vehicle.

[0007] The parking brake valve assembly according to the embodiment of the present invention has the advantages of simplified and compact structure, lightweight, and reduced failure risk.

[0008] According to some specific embodiments of the present invention, the first relay valve is a one-way valve, which forwardly connects the air source to the parking air chamber of the main vehicle and reversely connects the parking air chamber of the main vehicle to the atmosphere.

[0009] Furthermore, the flow rate of the bypass valve is smaller than the flow rate of the first relay valve.

[0010] According to some specific embodiments of the present invention, the parking brake valve assembly further includes: a trailer parking air chamber, which is connected downstream of the first relay valve. When the air pressure of the trailer parking air chamber reaches a preset air pressure of the trailer, the trailer parking is released.

[0011] According to some specific embodiments of the present invention, the parking air chamber of the host vehicle includes: a left air chamber and a right air chamber, and the left air chamber and the right air chamber are respectively connected to the first relay valve.

[0012] According to some specific embodiments of the present invention, the parking brake valve assembly further includes: a second relay valve, which is connected upstream of the main vehicle parking air chamber to control the on-off of the main vehicle parking air chamber.

[0013] According to some specific embodiments of the present invention, the parking brake valve assembly further includes: a third valve body, wherein the third valve body is connected to the second relay valve, and the second relay valve is disconnected when the third valve body is opened.

[0014] According to some specific embodiments of the present invention, the first valve body, the second valve body and the third valve body are all solenoid valves.

[0015] According to some specific embodiments of the present invention, the parking brake valve assembly is an electronic parking brake valve assembly.

[0016] According to an embodiment of the second aspect of the present utility model, a tractor is provided, comprising: a main vehicle and a trailer; and a parking brake valve assembly according to the above embodiment of the present utility model.

[0017] The tractor according to the embodiment of the present invention has the advantages of simplified and compact structure, lightweight, reduced failure risk, etc. by utilizing the parking brake valve assembly according to the above embodiment of the present invention.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0020] Figure 1 Schematic diagram of the parking brake valve assembly in the prior art;

[0021] Figure 2 is a schematic diagram of a parking brake of a parking brake valve assembly of the prior art;

[0022] Figure 3 Schematic diagram of a parking brake valve assembly releasing a parking brake according to an embodiment of the present utility model;

[0023] Figure 4 Schematic diagram of a parking brake valve assembly according to an embodiment of the present utility model;

[0024] Figure 5 Schematic diagram of a trailer releasing parking according to a parking brake valve assembly of an embodiment of the present utility model;

[0025] Figure 6 1 is a schematic diagram of a trailer parking brake using a parking brake valve assembly according to an embodiment of the present invention;

[0026] Reference numerals:

[0027] Existing technology:

[0028] Parking brake valve assembly 1', first valve body 100', air source 10', second valve body 200',

[0029] The first relay valve 300', the main vehicle parking air chamber 500', the trailer parking air chamber 600', the second relay valve 700',

[0030] The third valve body 800', the fourth valve body 900', the exhaust port 20',

[0031] This utility model:

[0032] Parking brake valve assembly 1, first valve body 100, air source 10, second valve body 200, first relay valve 300,

[0033] Bypass valve 400, main vehicle parking air chamber 500, trailer parking air chamber 600, second relay valve 700, exhaust port 20,

[0034] The third valve body 800 , the left air chamber 510 , and the right air chamber 520 . DETAILED DESCRIPTION

[0035] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like to 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 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 operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0036] In the description of the present invention, "first feature" and "second feature" may include one or more such features.

[0037] In the description of the present invention, “plurality” means two or more.

[0038] In the description of the present invention, a first feature being “above” or “below” a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact via another feature therebetween.

[0039] In the description of the present invention, a first feature “above”, “above” and “above” a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0040] First, let's introduce the parking brake valve assembly 1' in the prior art. Figure 1 and Figure 2 shown.

[0041] According to the parking brake valve assembly 1 ' of the embodiment of the present utility model, Figure 1 As shown, when the parking brake function of the vehicle and trailer needs to be released, the first valve body 100' is powered on and opened, and the gas from the gas source 10' pushes open the first relay valve 300'. The gas flows through the first relay valve 300' to the main vehicle parking air chamber 500' and the trailer parking air chamber 600' respectively. The gas in the main vehicle parking air chamber 500' releases the parking of the main vehicle, and the gas in the trailer parking air chamber 600' releases the parking of the trailer.

[0042] According to the parking brake valve assembly 1 ' of the embodiment of the present utility model, Figure 2 As shown, when the parking function of the main vehicle and the trailer needs to be realized, the first valve body 100' is closed, and the second valve body 200' is powered on and opened. The gas between the first valve body 100' and the second valve body 200' is instantly discharged through the exhaust port 20', and the first relay valve 300' is closed. The gas in the main vehicle parking air chamber 500' and the trailer parking air chamber 600' flows to the exhaust port 20' through the first relay valve 300', and the gas in the main vehicle parking air chamber 500' and the trailer parking air chamber 600' is released, and the main trailer enters the parking state.

[0043] According to the parking brake valve assembly 1 ' of the embodiment of the present utility model, Figure 2As shown, when the main vehicle parking force detection function needs to be realized (the main vehicle is parked alone, and the trailer is released from parking, to test whether the entire vehicle can be parked for a long time on a certain slope without slipping), it is only necessary to energize the fourth valve body 900' alone, and the gas from the gas source 10' passes through the fourth valve body 900' to directly supply gas to the trailer parking chamber 600'. At this time, the trailer has released the parking state alone, and the main vehicle parking chamber 500' is still in a state of braking the main vehicle's parking state, thereby realizing the main vehicle parking force detection function.

[0044] According to the parking brake valve assembly 1 ' of the embodiment of the present utility model, Figure 2 As shown, when the independent braking function of the trailer needs to be realized, the first valve body 100' and the third valve body 800' need to be energized, and the gas of the gas source 10 acts on the second relay valve 700' through the third valve body 800', and the second relay valve 700' is disconnected. At this time, the first valve body 100' is disconnected, and the second valve body 200' is opened. The gas in the trailer parking air chamber 600' flows to the exhaust port 20' through the first relay valve 300', while the main vehicle parking air chamber 600' maintains pressure, thereby realizing independent parking of the trailer.

[0045] However, conventional parking control systems for the main vehicle and trailer require numerous valve components, resulting in a large volume and high cost. Furthermore, if the first valve fails and leaks, gas could flow into the main vehicle's parking chamber 500' and the trailer's parking chamber 600', causing parking failure and potentially leading to a traffic accident. Therefore, the present invention proposes a parking brake valve assembly 1'.

[0046] The parking brake valve assembly 1 according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0047] like Figure 3-Figure 6 As shown, the parking brake valve assembly 1 according to an embodiment of the present invention includes: a first valve body 100 , a second valve body 200 , a first relay valve 300 , a bypass valve 400 and a host vehicle parking air chamber 500 .

[0048] The upstream portion of the first valve body 100 is connected to the air source 10. The second valve body 200 is connected downstream of the first valve body 100, forming a first flow path from the first valve body 100 toward the second valve body 200. The first relay valve 300 is connected downstream of the first valve body 100 and in parallel with the second valve body 200, forming a second flow path from the first valve body 100 toward the first relay valve 300. One end of the bypass valve 400 is connected to the inlet of the first relay valve 300 and the other end is connected to the outlet of the first relay valve 300. The main vehicle air chamber is connected downstream of the first relay valve 300. When the air pressure in the main vehicle parking air chamber 500 reaches the preset main vehicle pressure, the main vehicle is released from parking.

[0049] For example, the preset pressure is 850 kPa. When the pressure in the parking chamber 500 reaches 850 kPa, the parking brake of the host vehicle is fully released. When the pressure in the parking chamber 500 drops below 850 kPa, the parking brake of the host vehicle is engaged. The volume of the bypass valve 400 is much smaller than that of the fourth valve body 900' in the prior art.

[0050] According to the parking brake valve assembly 1 of the embodiment of the present utility model, Figure 3 As shown, when the parking brake function needs to be released, the first valve body 100 is opened, and the gas from the gas source 10 pushes open the first relay valve 300. The gas flows to the main vehicle parking air chamber 500 through the first relay valve 300, and the main vehicle parking air chamber 500 is inflated to release the parking of the main vehicle.

[0051] According to the parking brake valve assembly 1 of the embodiment of the present utility model, Figure 4 As shown, when the manual parking function needs to be implemented, the first valve body 100 is closed and the second valve body 200 is opened at the same time. The gas between the first valve body 100 and the second valve body 200 is instantly discharged through the exhaust port 20, the first relay valve 300 is closed, and the gas in the parking air chamber 500 of the main vehicle flows to the exhaust port 20 through the first relay valve 300. The gas in the parking air chamber 500 of the main vehicle is released and the vehicle enters the parking state.

[0052] According to the parking brake valve assembly 1 of the embodiment of the present invention, when it is necessary to release the parking brake function of the parking vehicle and the trailer, the first valve body 100 is opened, and the gas from the gas source 10 pushes open the first relay valve 300. The gas flows to the main vehicle parking air chamber 500 through the first relay valve 300, and the main vehicle parking air chamber 500 is inflated to release the parking of the main vehicle.

[0053] Furthermore, according to the parking brake valve assembly 1 of the embodiment of the present invention, by eliminating the fourth valve body 900', eliminating the corresponding flow path passing through the fourth valve body 900', and adding the bypass valve 400, the original brake control function can be retained, but the structure of the parking brake valve assembly 1 is simplified. Moreover, when the first valve body 100 fails and leaks slowly, the gas between the first valve body 100 and the second valve body 200 can be discharged to the exhaust port 20 through the bypass valve 400, so that pressure cannot be built up between the first valve body 100 and the second valve body 200, and the gas will not be introduced into the main vehicle parking air chamber 500, thereby reducing the risk of parking failure.

[0054] Therefore, the parking brake valve assembly 1 according to the embodiment of the present invention has the advantages of simplified and compact structure, lightweight, and reduced failure risk.

[0055] In some specific embodiments of the present invention, Figure 3-Figure 6As shown, the first relay valve 300 is a one-way valve. The first relay valve 300 forwardly connects the air source 10 to the parking air chamber 500 of the host vehicle, and reversely connects the parking air chamber 500 of the host vehicle to the atmosphere.

[0056] Furthermore, the flow rate of the bypass valve 400 is smaller than the flow rate of the first relay valve 300. The bypass valve 400 is always open, and the aperture of the bypass valve 400 is very small. If the first valve body 100 leaks slowly, the airflow can be discharged to the exhaust port 20 through the bypass valve 400. If the first solenoid valve is open, a large airflow is generated. At this time, the bypass valve 400 cannot withstand the large air pressure, and the gas passing through the bypass valve 400 is negligible.

[0057] In some specific embodiments of the present invention, Figure 3-Figure 6 As shown, the parking brake valve assembly 1 further includes: a trailer parking air chamber 600 , which is connected to the downstream of the first relay valve 300 . When the air pressure of the trailer parking air chamber 600 reaches the preset air pressure of the trailer, the trailer parking is released.

[0058] When you need to release the parking brake function of the vehicle and trailer, such as Figure 3 As shown, the first valve body 100 is opened, and the gas from the gas source 1010' pushes open the first relay valve 300. The gas flows through the first relay valve 300 to the main vehicle parking chamber 500 and the trailer parking chamber 600 respectively. The gas in the main vehicle parking chamber 500 releases the parking of the main vehicle, and the gas in the trailer parking chamber 600 flows to the trailer valve to release the parking of the trailer.

[0059] When the parking function of the main vehicle and trailer needs to be realized, such as Figure 4 As shown, the first valve body 100 is closed and the second valve body 200 is opened. The gas between the first valve body 100 and the second valve body 200 is instantly discharged through the three ports. The gas in the main vehicle parking air chamber 500 and the gas in the trailer parking air chamber 600 both flow to the exhaust port 20. The gas in the main vehicle parking air chamber 500 and the gas in the trailer parking air chamber 600 are released, and the main trailer enters the parking state.

[0060] In some specific embodiments of the present invention, Figure 3-Figure 6 As shown, the host vehicle's parking chamber 500 includes a left chamber 510 and a right chamber 520, each of which is connected to the first relay valve 300. Specifically, the left chamber 510 and the right chamber 520 are the left and right chambers 520 of the host vehicle's rear axle spring cylinder, respectively. Braking force can be transmitted to the left and right wheels separately. By controlling the gas in the left and right chambers 510, 520 simultaneously, the braking force is more balanced.

[0061] In some specific embodiments of the present invention, Figure 5 and Figure 6As shown, the parking brake valve assembly 1 further includes a second relay valve 700 , which is connected upstream of the parking air chamber 500 of the host vehicle to control the on-off of the parking air chamber 500 of the host vehicle.

[0062] By setting the second relay valve 700, the main vehicle parking air chamber 500 can be controlled to exhaust to the exhaust port 20. When the second relay valve 700 is opened, the main vehicle parking air chamber 500 and the exhaust port 20 can be connected. At this time, the first valve body 100 is closed, and the air source 10 no longer supplies air to the main vehicle parking air chamber 500. The gas in the main vehicle parking air chamber 500 is quickly discharged to the exhaust port 20 through the second relay valve 700. The air pressure in the main vehicle parking air chamber 500 drops, and the parking brake of the main vehicle can be realized.

[0063] In some specific embodiments of the present invention, Figure 5 and Figure 6 As shown, the parking brake valve assembly 1 further includes: a third valve body 800 , which is connected to the second relay valve 700 . When the third valve body 800 is opened, the second relay valve 700 is disconnected.

[0064] The third valve body 800 is connected to the second relay valve 700 to realize the linkage of the brake control. The third valve body 800 can be controlled by the common rail to indirectly control the second relay valve 700. The gas passing through the third valve body 800

[0065] like Figure 5 As shown, when the parking force detection function needs to be executed (the main vehicle is parked alone, the trailer is released from parking, and the whole vehicle is tested whether it can be parked for a long time on a certain slope without slipping), it is only necessary to connect the third valve body 800. At this time, the gas of the gas source 10 enters the third valve body 800 and disconnects the second relay valve 700. Then, the first valve body 100 is opened, and the gas of the gas source 10 passes through the first valve body 100 to supply gas to the trailer parking air chamber 600 alone. At this time, no gas enters the left air chamber 510 and the right air chamber 520 of the main vehicle parking air chamber 500. The main vehicle is in the parking state and the trailer is released from parking alone, thereby realizing the parking force detection function.

[0066] like Figure 6 As shown, when the independent braking function of the trailer needs to be realized, the first valve body 100 and the third valve body 800 need to be opened, and the gas of the gas source 10 acts on the second relay valve 700 through the third valve body 800, and the second relay valve 700 is disconnected. At this time, the first valve body 100 is disconnected and the second valve body 200 is opened. The gas in the trailer parking air chamber 600 flows to the exhaust port 20 through the second relay valve 700, while the left air chamber 510 and the right air chamber 520 of the main vehicle parking air chamber 500 maintain pressure, thereby realizing independent parking of the trailer.

[0067] In some specific embodiments of the present invention, the parking brake valve assembly 1 is an electronic parking brake valve assembly. Further, the first valve body 100, the second valve body 200 and the third valve body 800 are all solenoid valves.

[0068] By controlling the on and off of the first valve body 100, the second valve body 200 and the third valve body 800 through a program, the manual parking, manual release, trailer independent braking, parking force detection and other functions of the traditional parking brake valve assembly are realized.

[0069] The following describes a tractor according to an embodiment of the present invention, including a main vehicle and a trailer, and a parking brake valve assembly 1 according to the above embodiment of the present invention.

[0070] According to the tractor of the embodiment of the present invention, by parking the vehicle and the trailer using the parking brake valve assembly 1 according to the embodiment of the present invention, functions such as parking the main vehicle and parking the trailer are achieved, while having the advantages of simplified and compact structure, lightweight, and reduced failure risk.

[0071] Other structures and operations of the parking brake valve assembly 1 and the tractor according to the embodiment of the present invention are well known to those skilled in the art and will not be described in detail here.

[0072] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "example," "specific example," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0073] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A parking brake valve assembly, characterized in that: include: a first valve body, wherein an upstream portion of the first valve body is connected to a gas source; a second valve body, the second valve body being connected downstream of the first valve body, and forming a first flow path from the first valve body to the second valve body; a first relay valve connected downstream of the first valve body and in parallel with the second valve body, wherein the first valve body forms a second flow path toward the first relay valve; a bypass valve, one end of the bypass valve being connected to the inlet of the first relay valve and the other end of the bypass valve being connected to the outlet of the first relay valve; The main vehicle parking air chamber is connected to the downstream of the first relay valve, and the main vehicle parking is released when the air pressure of the main vehicle parking air chamber reaches the preset air pressure of the main vehicle.

2. The parking brake valve assembly according to claim 1, characterized in that: The first relay valve is a one-way valve. The first relay valve forwardly connects the air source to the parking air chamber of the host vehicle and reversely connects the parking air chamber of the host vehicle to the atmosphere.

3. The parking brake valve assembly according to claim 1, characterized in that: The flow rate of the bypass valve is smaller than the flow rate of the first relay valve.

4. The parking brake valve assembly according to claim 1, characterized in that: Also includes: The trailer parking air chamber is connected to the downstream of the first relay valve, and the trailer parking is released when the air pressure of the trailer parking air chamber reaches the preset air pressure of the trailer.

5. The parking brake valve assembly according to claim 1, characterized in that: The main vehicle parking air chamber includes: A left air chamber and a right air chamber, wherein the left air chamber and the right air chamber are respectively connected to the first relay valve.

6. The parking brake valve assembly according to claim 1, characterized in that: Also includes: The second relay valve is connected to the upstream of the parking air chamber of the main vehicle to control the on-off of the parking air chamber of the main vehicle.

7. The parking brake valve assembly according to claim 6, characterized in that: Also includes: The third valve body is connected to the second relay valve, and the second relay valve is disconnected when the third valve body is opened.

8. The parking brake valve assembly according to claim 7, characterized in that: The first valve body, the second valve body and the third valve body are all solenoid valves.

9. The parking brake valve assembly according to claim 8, characterized in that: The parking brake valve assembly is an electronic parking brake valve assembly.

10. A tractor, characterized in that: include: Main vehicle and trailer; The parking brake valve assembly according to any one of claims 1 to 9.

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