A trailer valve arrangement and vehicle

Abstract

The application provides a trailer valve device and a vehicle, relates to the technical field of trailer valves, and can reduce the icing phenomenon of the trailer valve device, thereby improving driving safety. The trailer valve device provided by the application comprises a valve shell, an electric heating assembly and a switch assembly. The electric heating assembly comprises a first conductive part and a second conductive part, the first conductive part and the second conductive part are arranged at intervals in the valve shell, one of the first conductive part and the second conductive part has a positive terminal, and the other has a negative terminal. The switch assembly comprises a connecting part and a bimetallic strip, the connecting part is rotationally connected with the valve shell, the connecting part is electrically connected with the first conductive part, the bimetallic strip is arranged in the valve shell, the bimetallic strip has an abutting state, in the abutting state, the bimetallic strip abuts against the connecting part, drives the connecting part to rotate relative to the valve shell, and makes the connecting part electrically connected with or disconnected from the second conductive part. The trailer valve device provided by the application is used for starting and releasing trailer braking.

Description

Technical Field

[0001] This application relates to the field of trailer valve technology, and more particularly to a trailer valve device and vehicle. Background Technology

[0002] A trailer is a vehicle towed by a tractor unit, requiring no independent drive unit, and is often used for transporting goods or for special purposes. The trailer valve is a crucial component of the trailer's braking system. Based on the tractor unit's braking signals, the trailer valve controls the inflation and deflation processes of the trailer's braking system, enabling the activation and deactivation of the trailer's brakes. This ensures synchronized braking between the tractor unit and the trailer, reducing the risk of collisions.

[0003] In related technologies, trailer valves are prone to freezing, causing the valve core and valve body to freeze together. This makes it difficult for the valve core to move relative to the valve body, preventing the trailer valve from opening and closing properly and affecting driving safety. Utility Model Content

[0004] This application provides a trailer valve device and vehicle that can reduce icing of the trailer valve device, thereby improving driving safety.

[0005] In a first aspect, this application provides a trailer valve device, which includes a valve housing, an electrothermal assembly, and a switching assembly. The electrothermal assembly includes a first conductive element and a second conductive element, which are spaced apart within the valve housing. One of the first and second conductive elements has a positive terminal, and the other has a negative terminal. The switching assembly includes a connector and a bimetallic strip. The connector is rotatably connected to the valve housing and electrically connected to the first conductive element. The bimetallic strip is disposed within the valve housing and is in an abutting state. In this abutting state, the bimetallic strip abuts against the connector, causing the connector to rotate relative to the valve housing, thereby electrically connecting or disconnecting the connector from the second conductive element.

[0006] The trailer valve device provided in this application has an electric heating component on the valve body. The electric heating component includes a first conductive element and a second conductive element spaced apart. A connector is electrically connected to the first conductive element and can also be electrically connected to the second conductive element, so that the first conductive element and the second conductive element can be electrically connected. In this way, the power supply, the first conductive element and the second conductive element form a circuit, and the electric heating component can heat the valve body, which helps to reduce the phenomenon of trailer valve icing, thereby improving driving safety.

[0007] Furthermore, the trailer valve device provided in this application can also disconnect the connector from the second conductive element, so that the power supply, the first conductive element and the second conductive element cannot form a series circuit. When the ambient temperature is high and the risk of the trailer valve freezing is low, disconnecting the first conductive element from the second conductive element can save energy.

[0008] Furthermore, in the trailer valve device provided in this application, the connection or disconnection between the connector and the second conductive element is achieved through a bimetallic strip. The bimetallic strip can automatically change its bending amplitude according to the change of ambient temperature, so that when the ambient temperature changes, the bimetallic strip can automatically drive the connector to move relative to the valve body, thereby connecting or disconnecting the connector and the second conductive element. In this way, the conduction state of the first conductive element and the second conductive element can automatically switch according to the change of ambient temperature, resulting in lower control costs and lower failure rates for switching the conduction state of the first conductive element and the second conductive element.

[0009] Furthermore, compared to the bimetallic strip being directly connected between the first and second conductive elements, the trailer valve device provided in this application uses a bimetallic strip that deforms to cause the connector to rotate relative to the valve housing. This allows the connector to connect or disconnect the first and second conductive elements, which helps to reduce the current passing through the bimetallic strip when the first and second conductive elements are connected. This results in a smaller electrothermal effect on the bimetallic strip, making it less prone to abnormal deformation and damage. It also makes the bimetallic strip more sensitive to ambient temperature, thereby enabling more precise control over the conduction state of the first and second conductive elements.

[0010] In conjunction with the first aspect, in some possible implementations, the connector is constructed as a strip connector, with the middle part of the connector rotatably connected to the valve body. In the abutting state, the bimetallic strip abuts against the first end of the connector, causing the second end of the connector to be electrically connected or disconnected from the second conductive element.

[0011] In this way, the connector is constructed as a strip-shaped connector, with its middle part rotatably connected to the valve body, forming a lever mechanism. The first end of the connector is used to abut against the bimetallic strip, and the second end is used to electrically connect or disconnect with the second conductive element. This allows the second end of the connector to move rapidly and significantly even under a small force from the bimetallic strip, making the switching assembly more sensitive to ambient temperature. It can promptly connect the first and second conductive elements in low-temperature environments, thereby reducing icing, and promptly disconnect the first and second conductive elements in high-temperature environments, thereby reducing energy consumption.

[0012] In combination with the first aspect and the above implementation methods, in some possible implementation methods, the switch assembly further includes a hinge shaft made of insulating material. The hinge shaft is fixedly connected to the valve body, and the connector has a mounting hole that is rotatably engaged with the hinge shaft.

[0013] By making the hinge shaft an insulating material, the hinge shaft is less likely to conduct electricity between the connector and the valve body. The charge at the connector is less likely to move to the valve body through the hinge shaft, which helps to reduce the risk of the valve body becoming electrified, thereby reducing the risk of vehicle leakage.

[0014] In conjunction with the first aspect and the above-described implementations, in some possible implementations, the connector has a connecting cavity. The inner surface of the connecting cavity includes a first region and a second region. Along the thickness direction of the bimetallic strip, the first region and the second region are respectively disposed opposite to the surfaces of opposite sides of the bimetallic strip. The abutting state includes a first abutting state and a second abutting state. In the first abutting state, the bimetallic strip abuts against the first region, causing the connector to be electrically connected to the second conductive element. In the second abutting state, the bimetallic strip abuts against the second region, causing the connector to be disconnected from the second conductive element.

[0015] In this way, the bimetallic strip can both drive the connector to electrically connect the connector to the second conductive element and drive the connector to separate the connector from the second conductive element. That is, the bimetallic strip can switch the first conductive element and the second conductive element from a conductive state to a disconnected state, and it can also switch the first conductive element and the second conductive element from a disconnected state to a conductive state. The bimetallic strip is fully utilized, which can reduce the use of other parts used to drive the movement of the connector, which helps to reduce costs and improve the compactness of the structure.

[0016] In combination with the first aspect and the above implementation methods, in some possible implementation methods, the switch assembly further includes a limiting member, which is fixedly connected to the valve body. Along the thickness direction of the bimetallic strip, at least one side of the connector is provided with a limiting member, and the connector and the limiting member limit each other along the thickness direction of the bimetallic strip.

[0017] By positioning the connector and the limiting member against each other along the thickness direction of the bimetallic strip, the limiting member can restrict the range of rotation of the connector relative to the valve body, making it less likely for the connector to rotate too much under the action of the bimetallic strip, thus preventing the connector from detaching from the bimetallic strip.

[0018] In combination with the first aspect and the above implementation methods, in some possible implementation methods, the limiting element is made of insulating material.

[0019] By making the limiting component an insulating material, when the connecting component and the limiting component are in contact, the limiting component is less likely to conduct electricity between the connecting component and the valve body. The charge at the connecting component is less likely to move to the valve body through the limiting component, which helps to reduce the risk of the valve body becoming electrified, thereby reducing the risk of vehicle leakage.

[0020] In conjunction with the first aspect and the above-described implementations, in some possible implementations, the switching assembly further includes a first elastic element. One end of the first elastic element is connected to the valve housing, and the other end is connected to the connecting member, so as to drive the connecting member to rotate relative to the valve housing. The first elastic element has a limit pose. In the limit pose, the axis of rotation of the connecting member relative to the valve housing intersects the straight line where the first elastic element is located, and the first elastic element is at its elastic limit.

[0021] By positioning the first elastic element at its elastic limit in its extreme position, and ensuring that the axis of rotation of the connector relative to the valve housing intersects the line containing the first elastic element, the bimetallic strip bends to one side in this extreme position, causing the connector to rotate relative to the valve housing. After the first elastic element deviates from its extreme position, its elastic restoring force can continue to accelerate the connector's rotation, allowing it to be stably connected to the second conductive element under the elastic force of the first elastic element. Furthermore, in the extreme position, the bimetallic strip bends to the other side, causing the connector to rotate relative to the valve housing. Again, after the first elastic element deviates from its extreme position, its elastic restoring force can continue to accelerate the connector's rotation, causing it to quickly separate from the second conductive element and stably maintain itself in the separated position. Thus, the first elastic element can both stably connect the connector to the second conductive element and stably maintain it in the separated position. The bimetallic strip primarily plays a control role, with the force on the connector mainly provided by the first elastic element. The relatively small force on the bimetallic strip improves its reliability.

[0022] In conjunction with the first aspect and the above-described implementations, in some possible implementations, the switch assembly further includes a pressing mechanism, which comprises a second elastic member and a pressing member. The pressing member is movably disposed on the connecting member and electrically connected to the connecting member. The second elastic member is disposed between the pressing member and the connecting member to drive the pressing member closer to the second conductive member along the thickness direction of the bimetallic strip, so that the pressing member and the second conductive member make conductive contact. In the extreme position, the pressing member abuts against the second conductive member.

[0023] In this way, the connector is electrically connected to or separated from the second conductive element via the pressing element. The second elastic element can drive the pressing element to move closer to the second conductive element. As the connector rotates relative to the valve body and gradually separates from the second conductive element, the second elastic element can undergo elastic deformation, maintaining a large force between the pressing element and the second conductive element. This helps reduce the risk of electrical sparks between the pressing element and the second conductive element. As the connector continues to rotate relative to the valve body, when the second elastic element exceeds its limit position, the elastic deformation of the second elastic element can accelerate the rotation of the connector relative to the valve body, causing the pressing element to quickly separate from the second conductive element, thus further reducing the risk of electrical sparks between the pressing element and the second conductive element.

[0024] In conjunction with the first aspect and the above-described implementations, in some possible implementations, the valve housing includes a valve cover and a valve body, the valve body having an opening, and the valve cover covering the opening. The side of the valve body with the opening is recessed to form a mounting groove, at least a portion of the heating element is embedded in the mounting groove, and the valve cover covering the mounting groove.

[0025] By forming a mounting groove in the valve body, at least a portion of the heating element is embedded within the mounting groove, making the heating element more securely mounted on the valve body. By forming the mounting groove on the side of the valve body with an opening, the heating element occupies less space in the valve cavity, thus minimizing its impact on the arrangement of components within the valve cavity (such as the valve core), which helps reduce design costs. By placing the valve cover over the mounting groove, the valve cover can protect the heating element, improving its reliability.

[0026] Secondly, this application provides a vehicle including a power source and the trailer valve device provided in the first aspect of this application. The positive terminal is connected to the positive terminal of the power source, and the negative terminal is connected to the negative terminal of the power source. The vehicle provided in this application, including the trailer valve device provided in the first aspect of this application, can achieve the same technical effect, namely, it can reduce the phenomenon of trailer valve icing, thereby improving driving safety. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a cross-sectional view of a trailer valve device in some embodiments of this application; Figure 2 yes Figure 1 Cross-sectional view at point AA; Figure 3 This is a schematic diagram of the bimetallic strip in the first contact state in some embodiments of this application; Figure 4 This is a schematic diagram of the structure in some embodiments of this application where the bimetallic strip is separated from the connector; Figure 5 This is a schematic diagram of the bimetallic strip in the second abutment state in some embodiments of this application; Figure 6 This is a schematic diagram of the structure in which the pressing member abuts against the second conductive member in some embodiments of this application; Figure 7 yes Figure 1 Cross-sectional view at point BB.

[0029] Explanation of reference numerals in the attached figures: 1. Valve housing; 11. Valve body; 111. Opening; 113. Switching chamber; 114. Medium chamber; 12. Valve cover; 2. Heating assembly; 21. Second conductive element; 211. Positive terminal; 22. First conductive element; 221. Negative terminal; 3. Switching assembly; 31. Connector; 311. Connecting chamber; 32. Bimetallic strip; 33. Hinge shaft; 34. Limiting element; 35. First elastic element; 36. Pressing mechanism; 361. Second elastic element; 362. Pressing element; 3621. First diameter section; 3622. Second diameter section; 363. Stop; 37. Insulating element; 4. First fastener; 5. Second fastener; 6. Partition. Detailed Implementation

[0030] The technical solutions in this application will now be described clearly and in detail with reference to the accompanying drawings.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this application.

[0032] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0033] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as implying or suggesting relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0034] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0035] In related technologies, trailer valves are prone to freezing, causing the valve core and valve body to freeze together. This makes it difficult for the valve core to move relative to the valve body, preventing the trailer valve from opening and closing properly and affecting driving safety.

[0036] The following analysis explains why trailer valves are prone to freezing in related technologies. Trailer valves are pneumatic valves, and the movement of the valve core is driven by air. The medium flowing inside the trailer valve is also air, which often contains a certain amount of moisture. In cold environments, the moisture in the air is easy to condense, causing the trailer valve to freeze.

[0037] Therefore, this application provides a vehicle, such as a truck or a tractor.

[0038] Please refer to Figure 1 , Figure 2 and Figure 3 The vehicle provided in this application embodiment includes a power supply and a trailer valve device. The trailer valve device includes a valve housing 1, an electrothermal assembly 2, and a switch assembly 3. The electrothermal assembly 2 includes a first conductive element 22 and a second conductive element 21, which are spaced apart on the valve housing 1. One of the first conductive element 22 and the second conductive element 21 has a positive terminal 211, and the other has a negative terminal 221. The positive terminal 211 is connected to the positive terminal of the power supply, and the negative terminal 221 is connected to the negative terminal of the power supply. The switch assembly 3 includes a connector 31 and a bimetallic strip 32. The connector 31 is rotatably connected to the valve housing 1 and electrically connected to the first conductive element 22. The bimetallic strip 32 is disposed on the valve housing 1 and has an abutting state. In the abutting state, the bimetallic strip 32 abuts against the connector 31, causing the connector 31 to rotate relative to the valve housing 1, thereby electrically connecting or disconnecting the connector 31 from the second conductive element 21.

[0039] The trailer valve device provided in this application embodiment has an electric heating component 2 on the valve housing 1. The electric heating component 2 includes a first conductive element 22 and a second conductive element 21 spaced apart. The connector 31 is electrically connected to the first conductive element 22 and can also be electrically connected to the second conductive element 21, so that the first conductive element 22 and the second conductive element 21 can be electrically connected. In this way, the power supply, the first conductive element 22 and the second conductive element 21 form a circuit, and the electric heating component 2 can heat the valve housing 1, which helps to reduce the phenomenon of trailer valve icing, thereby improving driving safety.

[0040] Furthermore, the trailer valve device provided in this application embodiment can also disconnect the connector 31 from the second conductive element 21, so that the power supply, the first conductive element 22 and the second conductive element 21 cannot form a series circuit. When the ambient temperature is high and the risk of the trailer valve freezing is low, disconnecting the first conductive element 22 and the second conductive element 21 can save energy.

[0041] Furthermore, in the trailer valve device provided in this application embodiment, the connection or disconnection between the connector 31 and the second conductive element 21 is achieved through a bimetallic strip 32. The bimetallic strip 32 can automatically change its bending amplitude according to the change of ambient temperature, so that when the ambient temperature changes, the bimetallic strip 32 can automatically drive the connector 31 to move relative to the valve body 1, thereby connecting or disconnecting the connector 31 and the second conductive element 21. In this way, the conduction state of the first conductive element 22 and the second conductive element 21 can be automatically switched according to the change of ambient temperature, resulting in lower control cost and lower failure rate for switching the conduction state of the first conductive element 22 and the second conductive element 21.

[0042] Furthermore, compared to the bimetallic strip 32 being directly connected between the first conductive element 22 and the second conductive element 21, the trailer valve device provided in this application embodiment has the bimetallic strip 32 deforming to drive the connector 31 to rotate relative to the valve housing 1, so that the connector 31 can connect or disconnect the first conductive element 22 and the second conductive element 21. This helps to reduce the current passing through the bimetallic strip 32 when the first conductive element 22 and the second conductive element 21 are connected, resulting in a smaller electrothermal effect of the bimetallic strip 32. This makes the bimetallic strip 32 less prone to abnormal deformation and damage, and also makes the bimetallic strip 32 more sensitive to ambient temperature, thereby enabling more precise control over the conduction state of the first conductive element 22 and the second conductive element 21.

[0043] Please refer to Figure 1 , Figure 2 and Figure 3 It should be explained that, in the embodiments of this application, the bimetallic strip 32 has the same meaning as commonly understood by those skilled in the art. The bimetallic strip 32 is composed of two or more layers of metals with different coefficients of thermal expansion, and it bends when the temperature changes. For example, in some embodiments of this application, when the ambient temperature is lower than a first preset temperature, such as 5 degrees Celsius, the bimetallic strip 32 drives the connector 31 to electrically connect the connector 31 to the second conductive element 21; when the ambient temperature is higher than the second preset temperature, such as 10 degrees Celsius, the bimetallic strip 32 drives the connector 31 to disconnect the connector 31 from the second conductive element 21.

[0044] Please refer to Figure 1 , Figure 2 and Figure 3 In some embodiments of this application, the bimetallic strip 32 is connected to the valve housing 1 by a first fastener 4, which can be a screw or bolt, etc. This ensures a stable and convenient connection between the bimetallic strip 32 and the valve housing 1. In some embodiments of this application, the bimetallic strip 32 is fixed to the valve body 11.

[0045] Please refer to Figure 1 , Figure 2 and Figure 3In some embodiments of this application, the second conductive element 21 is disposed on one side of the second end of the connector 31 along the thickness direction of the bimetallic strip 32. Thus, the direction of the force between the connector 31 and the second conductive element 21 is approximately along the thickness direction of the bimetallic strip 32, and the force exerted by the bimetallic strip 32 on the connector 31 is also approximately along the thickness direction of the bimetallic strip 32. This facilitates a more stable contact between the connector 31 and the second conductive element 21.

[0046] Please refer to Figure 1 , Figure 2 and Figure 3 In some embodiments of this application, the positive terminal 211 is part of the second conductive element 21, and the negative terminal 221 is part of the first conductive element 22. Thus, when the first conductive element 22 is disconnected from the second conductive element 21, the conductive elements are disconnected from the positive terminal of the power supply, which helps reduce the risk of the valve housing 1 becoming energized.

[0047] Please refer to Figure 1 , Figure 2 and Figure 3 In some embodiments of this application, at least one of the first conductive element 22 and the second conductive element 21 can be a heating coil. In some embodiments of this application, the outer surface of the heating coil can be covered with an insulating sleeve, thereby reducing the risk of the valve housing 1 becoming electrified. In some embodiments of this application, the insulating sleeve can be made of a high thermal conductivity material, such as silicone rubber fiberglass composite cloth, silicone rubber filled with materials such as alumina and boron nitride, polytetrafluoroethylene, polyetheretherketone, or polyimide.

[0048] Please refer to Figure 1 , Figure 2 and Figure 3 It is understood that in the embodiments of this application, the connector 31 is made of conductive material.

[0049] Please refer to Figure 1 , Figure 2 and Figure 3 In some embodiments of this application, the connector 31 can be rotatably connected to the valve body 11.

[0050] Please refer to Figure 1 , Figure 2 and Figure 3 In some embodiments of this application, the connector 31 is connected to the first conductive element 22 via a second fastener 5, which can be a screw or bolt, etc. This ensures a stable and convenient connection between the connector 31 and the first conductive element 22.

[0051] Please refer to Figure 1 , Figure 2 and Figure 3In some embodiments of this application, the trailer valve device further includes an insulating member 37. The insulating member 37 is fixedly connected to the connector 31, and the bimetallic strip 32 abuts against the connector 31 through the insulating member 37, thereby driving the conductive member to rotate relative to the valve housing 1, so that the connector 31 is electrically connected or disconnected from the second conductive member 21. In this way, the bimetallic strip 32 and the connector 31 are separated by the insulating part, making it difficult for the charge at the connector 31 to be transferred to the bimetallic strip 32, thus reducing the electrothermal effect of the bimetallic strip 32, making the bimetallic strip 32 less prone to abnormal deformation and damage, and also making the bimetallic strip 32 more sensitive to ambient temperature, thereby enabling more precise control over the conduction state of the first conductive member 22 and the second conductive member 21.

[0052] Please refer to Figure 1 , Figure 2 and Figure 3 In some embodiments of this application, the connector 31 is constructed as a strip connector 31, with the middle part of the connector 31 rotatably connected to the valve housing 1. In the abutting state, the bimetallic strip 32 abuts against the first end of the connector 31, so that the second end of the connector 31 is electrically connected or disconnected from the second conductive member 21.

[0053] Thus, the connector 31 is constructed as a strip-shaped connector 31, with its middle part rotatably connected to the valve housing 1, forming a lever mechanism. The first end of the connector 31 is used to abut against the bimetallic strip 32, and the second end is used to electrically connect or disconnect with the second conductive element 21. This allows the second end of the connector 31 to move rapidly and significantly even under a small force from the bimetallic strip 32, making the switching assembly 3 more sensitive to ambient temperature. It can promptly connect the first conductive element 22 and the second conductive element 21 in low-temperature environments, thereby reducing icing, and can promptly disconnect the first conductive element 22 and the second conductive element 21 in high-temperature environments, thereby reducing energy consumption.

[0054] Please refer to Figure 1 , Figure 2 and Figure 3 In this embodiment, the first end and the second end of the connector 31 are opposite ends of the connector 31. For example, in some embodiments of this application, the axis of rotation of the connector 31 relative to the valve housing 1 is perpendicular to the axis of the trailer valve device. The first end of the connector 31 is one end of the connector 31 along the axis of the trailer valve device, and the second end is the other end of the connector 31 along the axis of the trailer valve device. The axis of the trailer valve device can be vertical, the first end of the connector 31 can be the upper end of the connector 31, and the second end can be the lower end of the connector 31 along the axis.

[0055] Please refer to Figure 1 , Figure 2 and Figure 3In some embodiments of this application, the bimetallic strip 32 may extend axially along the trailer valve. This facilitates the arrangement of the bimetallic strip 32 within the trailer valve.

[0056] Please refer to Figure 1 , Figure 2 and Figure 3 In some embodiments of this application, the connector 31 forms a connecting cavity 311. The inner surface of the connecting cavity 311 includes a first region and a second region. Along the thickness direction of the bimetallic strip 32, the first region and the second region are respectively disposed opposite to the surfaces of opposite sides of the bimetallic strip 32. The abutting state includes a first abutting state and a second abutting state. In the first abutting state, the bimetallic strip 32 abuts against the first region, so that the connector 31 is electrically connected to the second conductive member 21. In the second abutting state, the bimetallic strip 32 abuts against the second region, so that the connector 31 is disconnected from the second conductive member 21.

[0057] In this way, the bimetallic strip 32 can both drive the connector 31 to electrically connect the connector 31 to the second conductive element 21, and also drive the connector 31 to separate the connector 31 from the second conductive element 21. That is, the bimetallic strip 32 can switch the first conductive element 22 and the second conductive element 21 from the conducting state to the disconnected state, and can also switch the first conductive element 22 and the second conductive element 21 from the disconnected state to the conducting state. The bimetallic strip 32 is fully utilized, which can reduce the use of other parts used to drive the movement of the connector 31, which is conducive to reducing costs and improving the compactness of the structure.

[0058] Please refer to Figure 1 , Figure 2 and Figure 3 In some embodiments of this application, the connecting cavity 311 is a connecting groove, and the depth direction of the connecting groove points to the axis of rotation of the connecting member 31 relative to the valve housing 1.

[0059] Please refer to Figure 1 , Figure 2 and Figure 3 In some embodiments of this application, the valve housing 1 is made of metal. The switch assembly 3 also includes a hinge shaft 33, which is made of insulating material. The hinge shaft 33 is fixedly connected to the valve housing 1, and the connector 31 has a mounting hole that is rotatably engaged with the hinge shaft 33.

[0060] By using metal as the material for the valve housing 1, its strength and rigidity are improved, thereby enhancing the reliability of the trailer valve device. By using an insulating material for the hinge shaft 33, it is less likely that the hinge shaft 33 will conduct electricity between the connector 31 and the valve housing 1. The charge at the connector 31 is less likely to move to the valve housing 1 through the hinge shaft 33, reducing the risk of the valve housing 1 becoming electrified and thus reducing the risk of vehicle electrical leakage.

[0061] Please refer to Figure 1 , Figure 2 and Figure 3 In some embodiments of this application, a threaded hole is formed on the valve housing 1, and the hinge shaft 33 is threadedly engaged with the threaded hole. This facilitates the connection between the hinge shaft 33 and the valve housing 1. In some embodiments of this application, the threaded hole may be formed on the valve body 11.

[0062] Please refer to Figure 1 , Figure 2 and Figure 3 In some embodiments of this application, the switch assembly 3 further includes a limiting member 34, which is fixedly connected to the valve housing 1. Along the thickness direction of the bimetallic strip 32, at least one side of the connector 31 is provided with the limiting member 34, and the connector 31 and the limiting member 34 mutually limit each other along the thickness direction of the bimetallic strip 32. By limiting the connector 31 and the limiting member 34 to each other along the thickness direction of the bimetallic strip 32, the limiting member 34 can restrict the range of rotation of the connector 31 relative to the valve housing 1, making it less likely that the connector 31 will rotate excessively under the action of the bimetallic strip 32, causing the connector 31 to detach from the bimetallic strip 32.

[0063] Please refer to Figure 1 , Figure 2 and Figure 3 In some embodiments of this application, along the thickness direction of the bimetallic strip 32, the limiting member 34 and the second conductive member 21 are respectively disposed on opposite sides of the second end of the connector 31. In this way, the rotation range of the connector 31 is limited between the second conductive member 21 and the limiting member 34, making it difficult for the connector 31 to detach from the bimetallic strip 32.

[0064] Please refer to Figure 1 , Figure 2 and Figure 3 In some embodiments of this application, the limiting member 34 may be fixedly connected to the valve body 11.

[0065] Please refer to Figure 1 , Figure 2 and Figure 3 In some embodiments of this application, the valve housing 1 is made of metal, and the limiting member 34 is made of insulating material. Making the valve housing 1 of metal improves its strength and rigidity, thereby enhancing the reliability of the trailer valve device. Making the limiting member 34 of insulating material prevents the connecting member 31 from easily conducting to the valve housing 1 when it abuts against the limiting member 34. This also reduces the risk of the valve housing 1 becoming electrified, thus minimizing the risk of vehicle electrical leakage.

[0066] Please refer to Figure 1 , Figure 2 and Figure 3 In some embodiments of this application, the switch assembly 3 further includes a first elastic member 35. One end of the first elastic member 35 is connected to the valve housing 1, and the other end is connected to the connector 31 to drive the connector 31 to rotate relative to the valve housing 1. The first elastic member 35 has a limit pose. In the limit pose, the axis of rotation of the connector 31 relative to the valve housing 1 intersects the straight line where the first elastic member 35 is located, and the first elastic member 35 is at its elastic limit.

[0067] By positioning the first elastic element 35 at its elastic limit in its extreme position, and ensuring that the axis of rotation of the connector 31 relative to the valve housing 1 intersects the line containing the first elastic element 35, the bimetallic strip 32 bends to one side in this extreme position, causing the connector 31 to rotate relative to the valve housing 1. After the first elastic element 35 deviates from its extreme position, its elastic restoring force can drive the connector 31 to continue accelerating its rotation. The connector 31 can then be stably connected to the second conductive element 21 under the action of the elastic force of the first elastic element 35. Furthermore, in the extreme position, the bimetallic strip 32 bends to the other side, causing the connector 31 to rotate relative to the valve housing 1. After the first elastic element 35 deviates from its extreme position, its elastic restoring force can drive the connector 31 to continue accelerating its rotation, causing the connector 31 to quickly separate from the second conductive element 21 and stably maintain itself in the separated position. In this way, the first elastic element 35 can both securely connect the connector 31 to the second conductive element 21 and securely keep the connector 31 in a position separated from the second conductive element 21. The bimetallic strip 32 mainly plays a control role. The force on the connector 31 is mainly provided by the first elastic element 35, and the force on the bimetallic strip 32 is relatively small, which is conducive to improving the reliability of the bimetallic strip 32.

[0068] Please refer to Figure 1 , Figure 2 and Figure 3 In this embodiment of the application, the first elastic element 35 can be implemented in various ways. For example, it can be a compression spring or a tension spring.

[0069] Please refer to Figure 3 , Figure 4 and Figure 5 In some embodiments of this application, the first elastic element 35 is a compression spring. Figure 3 The diagram shows the first elastic element 35 in its extreme pose, with the line containing the first elastic element 35 parallel to the vertical direction. Please refer to... Figure 4The bimetallic strip 32 bends to the right, causing the connector 31 to rotate relative to the valve housing 1. After the first elastic element 35 deviates from its extreme position, the elastic restoring force of the first elastic element 35 can drive the connector 31 to rotate clockwise at an accelerated speed. Under the action of the elastic force of the first elastic element 35, the connector 31 can be stably connected to the second conductive element 21. Please refer to... Figure 5 The bimetallic strip 32 bends to the left, causing the connector 31 to rotate relative to the valve body 1. After the first elastic element 35 deviates from its limit position, the elastic restoring force of the first elastic element 35 can drive the connector 31 to rotate counterclockwise at an accelerated speed. The connector 31 can be stably maintained in the position disconnected from the second conductive element 21 under the action of the elastic force of the first elastic element 35.

[0070] Please refer to Figure 3 , Figure 4 and Figure 5 It is understood that in the embodiments of this application, the first elastic element 35 is eccentrically positioned relative to the axis of rotational connection between the connecting member 31 and the valve housing 1. In some embodiments of this application, the first elastic element 35 is a compression spring, and in its extreme position, along the extending direction of the first elastic element 35, the axis of rotation of the connecting member 31 relative to the valve housing 1 is located on one side of the first elastic element 35. In some embodiments of this application, the first elastic element 35 is a tension spring, and in its extreme position, along the extending direction of the first elastic element 35, the axis of rotation of the connecting member 31 relative to the valve housing 1 passes through the first elastic element 35.

[0071] Please refer to Figure 3 , Figure 4 and Figure 5 In some embodiments of this application, in the extreme pose, the straight line where the first elastic member 35 is located can be perpendicular to the axis of rotation of the connecting member 31 relative to the valve housing 1.

[0072] Please refer to Figure 3 , Figure 4 and Figure 5 In some embodiments of this application, the first elastic member 35 may be connected between the valve body 11 and the connector 31.

[0073] Please refer to Figure 1 and Figure 6 In some embodiments of this application, the switch assembly 3 further includes a pressing mechanism 36, which includes a second elastic member 361 and a pressing member 362. The pressing member 362 is movably disposed on the connector 31 and electrically connected to the connector 31. The second elastic member 361 is disposed between the pressing member 362 and the connector 31 to drive the pressing member 362 closer to the second conductive member 21 along the thickness direction of the bimetallic strip 32, so that the pressing member 362 makes conductive contact with the second conductive member 21. In the extreme position, the pressing member 362 abuts against the second conductive member 21.

[0074] In this way, the connector 31 is electrically connected to or separated from the second conductive element 21 via the pressing element 362. The second elastic element 361 can drive the pressing element 362 to move closer to the second conductive element 21. This allows the second elastic element 361 to undergo elastic deformation during the process of the connector 31 rotating relative to the valve housing 1 and gradually separating from the second conductive element 21. This maintains a large force between the pressing element 362 and the second conductive element 21, reducing the likelihood of a loose connection and minimizing the risk of electrical sparks between them. As the connector 31 continues to rotate relative to the valve housing 1, when the second elastic element 361 exceeds its limit position, its elastic deformation accelerates the rotation of the connector 31 relative to the valve housing 1, causing the pressing element 362 to quickly separate from the second conductive element 21, further reducing the risk of electrical sparks between them.

[0075] Please refer to Figure 1 and Figure 6 In some embodiments of this application, the connector 31 is formed with a sliding hole, and the connector 31 slides into the sliding hole along the depth direction of the sliding hole. In this way, the connection between the pressing member 362 and the connector 31 is more reliable and the cost is lower.

[0076] Please refer to Figure 1 and Figure 6 In this embodiment of the application, the second elastic element 361 can be implemented in various ways. For example, it can be a compression spring or a tension spring.

[0077] Please refer to Figure 1 and Figure 6 In some embodiments of this application, the second elastic member 361 is a compression spring. The second elastic member 361 is disposed in the sliding hole, and the axial direction of the second elastic member 361 is the same as that of the sliding hole. The second elastic member 361 abuts against the surface of the pressing member 362 on the side away from the second conductive member 21.

[0078] Please refer to Figure 1 and Figure 6In some embodiments of this application, the pressing member 362 is cylindrical and includes a first diameter segment 3621 and a second diameter segment 3622. The diameter of the first diameter segment 3621 is smaller than that of the second diameter segment 3622. The first diameter segment 3621 and the second diameter segment 3622 are arranged along the depth direction of the sliding hole. The first diameter segment 3621 is located on the side of the second diameter segment 3622 closer to the second conductive member 21. The sliding hole is a stepped hole, which includes a first hole segment and a second hole segment. The diameter of the first diameter segment 3621 is the same as that of the first hole segment and they are slidably fitted. The diameter of the second diameter segment 3622 is the same as that of the second hole segment and they are slidably fitted. The end of the first diameter segment 3621 away from the second diameter segment 3622 extends out of the sliding hole, and the end face of the end of the first diameter segment 3621 away from the second diameter segment 3622 is used to abut against the connector 31. In this way, along the depth direction of the sliding hole, the inner surface of the sliding hole can be mutually restrained with the second diameter segment 3622, which can reduce the risk that the pressing member 362 will be pushed out of the sliding hole by the second elastic member 361.

[0079] Please refer to Figure 1 and Figure 6 In some embodiments of this application, the end of the second segment away from the first segment passes through the connector 31. The pressing mechanism 36 also includes a stop 363, which detachably covers the end of the second segment away from the first segment. The surface of the second elastic member 361 away from the pressing member 362 abuts against the surface of the stop 363 near the second segment. Thus, the pressing member 362 and the second elastic member 361 can be inserted into the second segment through the end of the second segment away from the first segment, facilitating their installation within the sliding hole. The stop 363 acts as a barrier, reducing the risk of the pressing member 362 and the second elastic member 361 detaching from the sliding hole.

[0080] Please refer to Figure 1 and Figure 6 In some embodiments of this application, the end of the second elastic member 361 away from the stop member 363 may abut against the second diameter segment 3622.

[0081] Please refer to Figure 1 and Figure 6 In some embodiments of this application, the stop 363 can be a screw, with the shank threaded into the second hole segment and the screw nut covering the end of the second hole segment away from the first hole segment. This makes it easier to connect the stop 363 to the sliding hole.

[0082] Please refer to Figure 1 and Figure 7In some embodiments of this application, the valve housing 1 includes a valve cover 12 and a valve body 11. The valve body 11 has an opening 111, and the valve cover 12 covers the opening 111. The side of the valve body 11 with the opening 111 is recessed to form a mounting groove. At least a portion of the electric heating assembly 2 is embedded in the mounting groove, and the valve cover 12 covers the mounting groove.

[0083] By forming a mounting groove in the valve body 11, at least a portion of the heating element 2 is embedded within the mounting groove, making the installation of the heating element 2 on the valve housing 1 more stable. By forming the mounting groove on the side of the valve body 11 where the opening 111 is formed, the heating element 2 occupies less space in the valve cavity, thereby minimizing its impact on the arrangement of components (such as the valve core) within the valve cavity, which helps reduce design costs. By covering the mounting groove with the valve cover 12, the valve cover 12 can protect the heating element 2, which helps improve the reliability of the heating element 2.

[0084] Please refer to Figure 1 and Figure 7 In this embodiment of the application, the opening 111 may be formed at the bottom of the valve body 11. In some embodiments of the application, the opening 111 may also be formed at the top of the valve body 11. Figure 1 The diagram shows a case where the opening 111 can be formed at the bottom of the valve body 11.

[0085] Please refer to Figure 1 and Figure 7 In some embodiments of this application, the mounting groove extends circumferentially along the opening 111. This makes the arrangement of the mounting groove and the opening 111 more compact, which is beneficial to improving the structural compactness of the valve body 11.

[0086] Please refer to Figure 1 and Figure 7 In some embodiments of this application, the mounting slot includes a first sub-slot and a second sub-slot. Both the first and second sub-slots can extend circumferentially along the opening 111, and the first and second sub-slots can be arranged circumferentially along the opening 111. At least a portion of the first conductive element 22 and at least a portion of the second conductive element 21 are respectively disposed within the first and second sub-slots. This arrangement, by disposing at least a portion of the first conductive element 22 and at least a portion of the second conductive element 21 within the first and second sub-slots respectively, reduces the risk of a short circuit between the first conductive element 22 and the second conductive element 21.

[0087] Please refer to Figure 1 and Figure 7In some embodiments of this application, the first conductive element 22 and the second conductive element 21 are respectively provided with a positive terminal 211 and a negative terminal 221 at their ends close to each other. The other end of the first conductive element 22 is connected to the connector 31, which rotates relative to the valve body 1, allowing the connector 31 to connect or disconnect from the other end of the second conductive element 21. In this way, the distance between the connection point of the first conductive element 22 and the connector 31 and the connection point of the second conductive element 21 is relatively short, allowing the connector 31 to have a shorter length and thus connect between the first conductive element 22 and the second conductive element 21. This saves material and facilitates the arrangement of the connector 31 in the valve body 1.

[0088] Please refer to Figure 1 and Figure 7 In some embodiments of this application, the first end of the first sub-slot penetrates the valve body 11 along the length direction of the first sub-slot, and the first end of the second sub-slot penetrates the valve body 11 along the length direction of the second sub-slot. The first ends of the first sub-slot and the first ends of the second sub-slot are respectively the ends of the first sub-slot and the second sub-slot that are close to each other. In some embodiments of this application, the positive terminal 211 is part of the first conductive element 22, and the negative terminal 221 is part of the second conductive element 21. The positive terminal 211 extends out of the first sub-slot through the first end of the first sub-slot to be connected to the positive terminal of the power supply, and the negative terminal 221 extends out of the second sub-slot through the first end of the second sub-slot to be connected to the negative terminal of the power supply. In some embodiments of this application, the positive terminal 211 is part of the second conductive element 21, and the negative terminal 221 is part of the first conductive element 22. The positive terminal 211 extends out of the second sub-slot through the first end of the second sub-slot to be connected to the negative terminal of the power supply, and the positive terminal 211 extends out of the first sub-slot through the first end of the first sub-slot to be connected to the positive terminal of the power supply.

[0089] Please refer to Figure 1 and Figure 7 In some embodiments of this application, the second end of the first sub-slot penetrates the valve body 11 along the length direction of the first sub-slot, and the second end of the second sub-slot penetrates the valve body 11 along the length direction of the second sub-slot. The second ends of the first sub-slot and the second sub-slot are respectively the ends of the first sub-slot and the second sub-slot that are close to each other. The first conductive element 22 extends into the valve cavity through the second end of the first sub-slot to connect with the connector 31, and the second conductive element 21 extends into the valve cavity through the second end of the second sub-slot, so that the connector 31 can connect or disconnect with the second end of the second sub-slot during the process of the connector 31 being rotated relative to the valve body 1 by the bimetallic strip 32.

[0090] Please refer to Figure 1 and Figure 7In some embodiments of this application, a partition 6 is provided inside the valve cavity to divide the valve cavity into a medium cavity 114 and a switching cavity 113. The medium cavity 114 is used for air circulation, the valve core is disposed in the medium cavity 114, and the switching assembly 3 is disposed in the switching cavity 113. In this way, the influence of the flow of the medium in the trailer valve device on the bimetallic strip 32 can be reduced, making the bimetallic strip 32 less prone to deformation under the interference of the medium, and also making the connector 31 less prone to movement relative to the valve body 1 under the interference of the medium.

[0091] The above embodiments are merely illustrative of the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way.

Claims

1. A trailer valve device, characterized in that, include: Valve housing (1); The electric heating assembly (2) includes a first conductive element (22) and a second conductive element (21), the first conductive element (22) and the second conductive element (21) being disposed at a distance from each other in the valve housing (1), one of the first conductive element (22) and the second conductive element (21) having a positive terminal (211) and the other having a negative terminal (221); The switch assembly (3) includes a connector (31) and a bimetallic strip (32). The connector (31) is rotatably connected to the valve housing (1) and electrically connected to the first conductive element (22). The bimetallic strip (32) is disposed on the valve housing (1) and has an abutting state. In the abutting state, the bimetallic strip (32) abuts against the connector (31), causing the connector (31) to rotate relative to the valve housing (1), so that the connector (31) is electrically connected or disconnected from the second conductive element (21).

2. The trailer valve device according to claim 1, characterized in that, The connector (31) is constructed as a strip connector (31), and the middle part of the connector (31) is rotatably connected to the valve body (1). In the abutting state, the bimetallic strip (32) abuts against the first end of the connector (31), so that the second end of the connector (31) is electrically connected or disconnected from the second conductive element (21).

3. The trailer valve device according to claim 1, characterized in that, The switch assembly (3) also includes a hinge shaft (33), which is made of insulating material. The hinge shaft (33) is fixedly connected to the valve housing (1). The connector (31) has a mounting hole, which is rotatably engaged with the hinge shaft (33).

4. The trailer valve device according to claim 1, characterized in that, The connector (31) has a connecting cavity (311), the inner surface of the connecting cavity (311) includes a first region and a second region, and along the thickness direction of the bimetallic sheet (32), the first region and the second region are respectively disposed opposite to the surfaces on opposite sides of the bimetallic sheet (32); The contact state includes a first contact state and a second contact state. In the first contact state, the bimetallic strip (32) contacts the first region, so that the connector (31) is electrically connected to the second conductive element (21). In the second contact state, the bimetallic strip (32) contacts the second region, so that the connector (31) is disconnected from the second conductive element (21).

5. The trailer valve device according to claim 1, characterized in that, The switch assembly (3) further includes a limiting member (34), which is fixedly connected to the valve housing (1). Along the thickness direction of the bimetallic strip (32), the limiting member (34) is provided on at least one side of the connector (31). Along the thickness direction of the bimetallic strip (32), the connector (31) and the limiting member (34) limit each other.

6. The trailer valve device according to claim 5, characterized in that, The limiting member (34) is made of insulating material.

7. The trailer valve device according to claim 1, characterized in that, The switch assembly (3) further includes a first elastic element (35), one end of which is connected to the valve housing (1) and the other end is connected to the connector (31) to drive the connector (31) to rotate relative to the valve housing (1); The first elastic element (35) has a limit pose. In the limit pose, the axis of rotation of the connecting element (31) relative to the valve housing (1) intersects the straight line where the first elastic element (35) is located, and the first elastic element (35) is at the elastic limit.

8. The trailer valve device according to claim 7, characterized in that, The switch assembly (3) further includes a pressing mechanism (36), which includes a second elastic member (361) and a pressing member (362). The pressing member (362) is movably disposed on the connector (31) and electrically connected to the connector (31); The second elastic member (361) is disposed between the pressing member (362) and the connecting member (31) to drive the pressing member (362) closer to the second conductive member (21) along the thickness direction of the bimetallic sheet (32), so that the pressing member (362) and the second conductive member (21) make conductive contact; In the extreme position, the pressing member (362) abuts against the second conductive member (21).

9. The trailer valve device according to any one of claims 1 to 8, characterized in that, The valve housing (1) includes a valve cover (12) and a valve body (11), the valve body (11) having an opening (111), and the valve cover (12) covering the opening (111). The valve body (11) has a recessed side with the opening (111) and a mounting groove. At least a portion of the electric heating assembly (2) is embedded in the mounting groove, and the valve cover (12) is placed over the mounting groove.

10. A vehicle, characterized in that, include: power supply; According to any one of claims 1 to 9, the positive terminal (211) is connected to the positive terminal of the power supply, and the negative terminal (221) is connected to the negative terminal of the power supply.

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