Self-locking device for high-pressure tank isolation valve and high-pressure tank isolation valve

Abstract

This utility model provides a self-locking device for a high-pressure fuel tank isolation valve and a high-pressure fuel tank isolation valve. The self-locking device for the high-pressure fuel tank isolation valve includes a housing, a drive assembly, and a limiting part. The housing is a cylindrical structure with openings at both ends, and a receiving cavity is formed inside the cylindrical structure. The drive assembly includes a drive body, a return spring, and a flexible conveyor belt. At least a portion of the drive body is located inside the receiving cavity and can reciprocate within the receiving cavity under the action of spring force or external force. The flexible conveyor belt is connected to the drive body. The limiting part is connected to the drive assembly through the flexible conveyor belt and moves towards or away from the housing under the action of the drive assembly. By setting the drive assembly and the limiting part, the opening control of the fuel tank isolation valve during vehicle assembly is realized, which solves the cumbersome operation of energizing the fuel tank isolation valve when refueling during vehicle assembly, improves the production efficiency of vehicle assembly line, and meets the vehicle's compatibility requirements.

Description

Technical Field

[0001] This utility model relates to the field of vehicle parts technology, and in particular to a high-pressure fuel tank isolation valve. Specifically, it relates to a self-locking device for a high-pressure fuel tank isolation valve and a high-pressure fuel tank isolation valve having a self-locking device. Background Technology

[0002] With the increasing severity of vehicle exhaust pollution, emission regulations have become increasingly stringent, restricting vehicle emissions to the atmosphere. This has also spurred the rapid development of hybrid electric vehicle technology. Currently, hybrid vehicles, including plug-in hybrid electric vehicles (PHEVs), have gradually become the most accepted type of vehicle for the general public after several years of technological accumulation.

[0003] Hybrid electric vehicles (PHEVs) are not only highly intelligent but also possess the technical characteristics of being able to operate on both gasoline and electric power, resulting in better fuel economy. In response to this, a high-pressure fuel tank isolation valve has emerged. This valve strictly controls the emission of fuel vapors from the fuel tank to the carbon canister, preventing frequent transfer of fuel vapors from the fuel tank to the carbon canister during the switching between the fuel and electrical circuits in PHEV models, thus avoiding saturation or even direct venting into the atmosphere.

[0004] However, during the production of hybrid vehicles, a small amount of fuel is pre-filled into the fuel tank. But at this time, the fuel tank isolation valve may not be able to provide the driving power or may have difficulty providing the driving power due to the conditions of the customer's production line. In this case, the fuel tank isolation valve is in a closed state, which prevents the customer from refueling or causes the fuel nozzle to keep shutting off during the refueling process, reducing the production efficiency of the customer's production line.

[0005] Therefore, existing technologies suffer from the technical problem of low production efficiency during the assembly of hybrid vehicles because the high-pressure isolation valve is normally closed. Utility Model Content

[0006] The main objective of this invention is to provide a self-locking device for a high-pressure oil tank isolation valve, in order to solve the technical problem of low production efficiency caused by the high-pressure isolation valve being in a normally closed state during the assembly of hybrid vehicles in the prior art.

[0007] To achieve the above objectives, according to one aspect of the present invention, a self-locking device for a high-pressure oil tank isolation valve is provided, comprising: The shell is a cylindrical structure open at both ends, and the interior of the cylindrical structure forms a receiving cavity. A drive assembly includes a drive body, a return spring, and a flexible conveyor belt. At least a portion of the drive body is located within the receiving cavity and is capable of reciprocating within the receiving cavity under the action of spring force or external force. The flexible conveyor belt is connected to the drive body. The limiting part is connected to the driving component via a flexible conveyor belt and moves toward or away from the housing under the action of the driving component.

[0008] Furthermore, a spring abutment is provided at one end of the drive body, and the return spring is sleeved on the drive body, with both ends of the return spring abutting against the spring abutment and one end of the housing, respectively.

[0009] Furthermore, the spring abutment portion is integrally formed with the drive body; or, the drive assembly further includes a latch, the latch is ring-shaped, the edge of the latch is provided with a plurality of snap-fit ​​portions, the drive body has a stepped portion at one end near the latch, the snap-fit ​​portions can be engaged with the stepped portion, and the spring abutment portion is formed on the snap-fit ​​portion.

[0010] Furthermore, the housing is provided with an ear plate, which extends outward from the outer periphery of the housing, and the ear plate is provided with a fixing recess for fixing the housing.

[0011] Furthermore, the housing is provided with an ear plate, which extends outward from the outer periphery of the housing, and the ear plate is provided with positioning holes and fixing holes.

[0012] Furthermore, a positioning groove is provided on the inner wall of the receiving cavity, the positioning groove is arranged along the axis of the receiving cavity, and the driving body has a positioning protrusion that matches the positioning groove.

[0013] Furthermore, the two ends of the flexible conveyor belt are detachably connected to the limiting part and the drive body, respectively.

[0014] Furthermore, a pressing part is provided at the end of the housing away from the return spring. The end of the pressing part has a smooth arc surface. During the movement of the flexible conveyor belt, the smooth arc surface slides in contact with the flexible conveyor belt so that the flexible conveyor belt moves along a fixed path.

[0015] Furthermore, the two ends of the flexible conveyor belt are respectively snapped together with the drive body and the limiting part, and / or the width of the pressing part is greater than the width of the flexible conveyor belt.

[0016] According to another aspect of the present invention, a high-pressure oil tank isolation valve is provided, including the self-locking device described in any of the preceding claims. The high-pressure oil tank isolation valve further includes a housing, the housing including an upper chamber and a lower chamber, the self-locking device being located in the upper chamber, the upper chamber communicating with the oil tank, the lower chamber communicating with the carbon canister, a positioning groove for sliding of the flexible conveyor belt being provided on the bottom surface of the upper chamber, and a fixing part being provided in the upper chamber.

[0017] The high-pressure fuel tank isolation valve with pressure sensor provided by this utility model can control the reciprocating movement of the limiting part within the receiving cavity by setting a drive component. This allows the limiting part to reciprocate within the high-pressure isolation valve. When it is in the locked position, the limiting part can prevent the fuel tank isolation valve from closing, thus ensuring that the fuel tank isolation valve is always in the open state. This facilitates refueling the fuel tank during the production process. When the vehicle rolls off the production line after refueling, the fuel tank isolation valve is energized when the vehicle is powered on for the first time. The limiting part is reset by the return spring, and the open state is disabled. The self-locking device is released, and the fuel tank isolation valve realizes the normal pressure management function of oil and gas in the high-pressure fuel tank. By setting a drive component and a limiting part, the opening control of the fuel tank isolation valve during vehicle assembly is realized, which solves the cumbersome operation of energizing the fuel tank isolation valve when refueling during vehicle assembly, improves the production efficiency of vehicle rollout, and meets the vehicle's compatibility requirements. Attached Figure Description

[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings: Figure 1 A schematic diagram of the self-locking device according to the present invention is shown; Figure 2 A schematic diagram of the structure of the self-locking device according to this utility model in another state is shown; Figure 3 A schematic diagram of the drive assembly according to the present invention is shown.

[0019] The above figures include the following reference numerals: 10. Housing; 11. Ear plate; 12. Pressing part; 20. Drive assembly; 21. Drive body; 22. Return spring; 23. Flexible conveyor belt; 30. Limiting part; 40. Lock. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0021] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0022] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0023] To address the technical problem of low production efficiency caused by the high-pressure isolation valve being in a normally closed state during the assembly of hybrid vehicles in the existing technology, this utility model provides a self-locking device for the high-pressure oil tank isolation valve.

[0024] The main objective of this invention is to provide a self-locking device for a high-pressure oil tank isolation valve, such as... Figures 1 to 3 As shown, the self-locking device for a high-pressure oil tank isolation valve includes a housing 10, a drive assembly 20, and a limiting part 30. The housing 10 is a cylindrical structure with openings at both ends, and a receiving cavity is formed inside the cylindrical structure. The drive assembly 20 includes a drive body 21, a return spring 22, and a flexible conveyor belt 23. At least a portion of the drive body 21 is located inside the receiving cavity and can reciprocate within the receiving cavity under the action of spring force or external force. The flexible conveyor belt 23 is connected to the drive body 21. The limiting part 30 is connected to the flexible conveyor belt 23, so that the limiting part 30 is connected to the drive assembly 20 through the flexible conveyor belt 23 and moves towards or away from the housing 10 under the action of the drive assembly 20.

[0025] The self-locking device for the high-pressure oil tank isolation valve provided by this utility model, by setting the drive component 20, can control the reciprocating movement of the limiting part 30 in the receiving cavity, so that the limiting part 30 can reciprocate within the high-pressure isolation valve. When it is in the locked position, the limiting part 30 can prevent the oil tank isolation valve from closing, thus ensuring that the oil tank isolation valve is always in the open state, which is convenient for customers to refuel the tank during the production process. When the customer refuels and the whole vehicle rolls off the production line, after the oil tank isolation valve is energized when the whole vehicle is powered on for the first time, the limiting part 30 is reset under the action of the return spring 22, the open state is invalidated, the self-locking device is in the released state, and the oil tank isolation valve realizes the normal pressure management function of oil and gas in the high-pressure oil tank. By setting the drive component 20 and the limiting part 30, the opening control of the oil tank isolation valve during the whole vehicle assembly is realized, which solves the cumbersome operation of needing to energize the oil tank isolation valve when refueling during the whole vehicle assembly process, improves the production efficiency of the whole vehicle rollout, and at the same time meets the vehicle's compatibility function. Furthermore, a spring abutment is provided at one end of the drive body 21 away from the flexible conveyor belt 23, and the reset spring 22 is sleeved on the drive body 21, with both ends of the reset spring 22 abutting against the spring abutment and one end of the housing 10, respectively.

[0026] Preferably, the spring abutment and the drive body 21 are integrally formed, which is more conducive to the processing of the drive body 21. Of course, the spring abutment and the drive body 21 can also be processed separately and then assembled and fixed. Thus, the drive assembly 20 also includes a latch 40, which is ring-shaped and has several snap-fit ​​parts on its edge. The drive body 21 has a stepped part at one end near the latch 40, and the snap-fit ​​parts can engage with the stepped part to achieve a detachable connection between the latch 40 and the drive body 21. The outer edge of the snap-fit ​​part is formed at the spring abutment part. For example, the spring abutment part can be a snap-fit ​​step. The outer diameter of the spring abutment part is smaller than the inner diameter of the return spring 22, which is beneficial for fixing the return spring 22.

[0027] For ease of assembly, the flexible conveyor belt 23 is provided with through holes or locking blocks at both ends, which allow for detachable connection with the limiting part 30 and the drive body 21, respectively. The flexible conveyor belt 23 may be made of rubber, for example.

[0028] To facilitate the fixing of the self-locking device and the fuel tank isolation valve, the housing 10 is provided with a lug plate 11, which extends outward from the outer periphery of the housing 10. The lug plate 11 has a fixing recess for fixing the housing 10. Correspondingly, the fuel tank isolation valve is provided with a fixing protrusion that matches the fixing recess. For example, there are two fixing recesses located on both sides of the housing 10, and there are also two fixing protrusions, which cooperate with the fixing recesses from both sides of the housing 10 to fix the housing 10.

[0029] In another embodiment of this application, the ear plate 11 is provided with a positioning hole and a fixing hole, and the oil tank isolation valve is provided with a positioning pin that matches the positioning hole. During the assembly process, the positioning hole is first inserted into the positioning pin located inside the oil tank isolation valve to achieve the positioning of the housing 10. Then, screws and other fasteners are inserted into the fixing hole to fix the housing 10 to the oil tank isolation valve through the fasteners.

[0030] To prevent the flexible conveyor belt 23 from bulging during movement and to ensure its stable movement, a pressing part 12 is provided at the end of the housing 10 away from the return spring 22. The end of the pressing part 12 is provided with a smooth arc surface. During the movement of the flexible conveyor belt 23, the smooth arc surface slides in contact with the flexible conveyor belt 23, so that the flexible conveyor belt 23 moves along a fixed path. Optionally, the width of the pressing part 12 is greater than the width of the flexible conveyor belt 23, so that the flexible conveyor belt 23 is pressed by the pressing part 12 during movement.

[0031] To facilitate installation and prevent the drive body 21 from rotating freely within the housing 10 during use, the housing 10 has a through hole through which the locking tongue passes. At least a portion of the inner wall of the through hole is provided with a positioning groove. The drive body 21 has a positioning protrusion that matches the positioning groove. Thus, during use, the positioning protrusion matches the positioning groove, effectively preventing the drive body 21 from rotating freely within the housing 10.

[0032] According to another aspect of the present invention, the present invention also provides a high-pressure oil tank isolation valve, the high-pressure oil tank isolation valve including a shell, the shell including an upper chamber and a lower chamber, the self-locking device being located in the upper chamber, the upper chamber communicating with the oil tank, the lower chamber communicating with the carbon canister, the bottom surface of the upper chamber being provided with a positioning groove for the flexible conveyor belt 23 to slide, and the upper chamber also being provided with a fixing part.

[0033] During the assembly process of the self-locking device provided by this utility model, the two ends of the flexible conveyor belt 23 are respectively inserted and fixed to the drive body 21 and the limiting part 30. The drive body 21 is passed through the through hole on the housing 10. The return spring 22 is sleeved on the outer peripheral surface of the drive body 21. Then, the latch 40 is snapped and fixed to the step part on the drive body 21, so that the return spring 22 is located between the latch 40 and the housing 10. After the assembly of the drive body 21 and the housing 10 is completed, the housing 10 is fixed to the oil tank isolation valve, thereby completing the assembly of the self-locking device.

[0034] After the high-pressure isolation valve is assembled, the electromagnetic coil of the electromagnetic drive assembly 20 of the high-pressure isolation valve is energized. The first sealing valve will move upward under the action of electromagnetic force. At this time, a push rod is inserted into the isolation valve from the first port to apply a certain force to the end of the drive body 21 of the self-locking device, so that it overcomes the spring force of the return spring 22 and moves downward. This drives the body 21 to push the flexible conveyor belt 23 to move along the prescribed path, and then pushes the limiting part 30 to move towards the valve assembly closer to the isolation valve. When the limiting part 30 of the self-locking device is below the valve assembly, the power supply to the electromagnetic drive assembly 20 is stopped, and the first sealing valve moves downward, so that the first sealing valve abuts against the end of the limiting part 30. The limiting part 30 obstructs the downward movement path of the first sealing valve. At this time, there is still a flow channel between the first sealing valve and the first opening, so that the first opening remains open. When there is pressure input at the oil tank end, the oil vapor pressure flows through the flow channel.

[0035] When the electromagnetic drive assembly 20 is energized again, the first sealing valve moves upward again under the drive of the armature, causing the limiting part 30 to disengage from the first sealing valve. At this time, the drive body 21 in the self-locking device moves upward under the action of the return spring 22, thereby driving the limiting part 30 to move away from the valve assembly via the flexible conveyor belt 23. The self-locking device returns to the released state and enters the self-locking failure state. When the electromagnetic drive coil is de-energized, the first sealing valve abuts against the outer shell under the action of the first spring, the oil tank isolation valve is in a closed state, and the oil tank isolation valve begins to regulate the positive and negative pressure of the oil tank. In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0036] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0037] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0038] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A self-locking device for a high-pressure oil tank isolation valve, characterized in that, include: The shell is a cylindrical structure open at both ends, and the interior of the cylindrical structure forms a receiving cavity. A drive assembly includes a drive body, a return spring, and a flexible conveyor belt. At least a portion of the drive body is located within the receiving cavity and is capable of reciprocating within the receiving cavity under the action of spring force or external force. The flexible conveyor belt is connected to the drive body. The limiting part is connected to the driving component via a flexible conveyor belt and moves toward or away from the housing under the action of the driving component.

2. The self-locking device for a high-pressure oil tank isolation valve according to claim 1, characterized in that, One end of the drive body is provided with a spring abutment, and the return spring is sleeved on the drive body. The two ends of the return spring abut against the spring abutment and one end of the housing, respectively.

3. The self-locking device for a high-pressure oil tank isolation valve according to claim 2, characterized in that, The spring abutment portion is integrally formed with the drive body; or, the drive assembly further includes a latch, the latch is ring-shaped, the edge of the latch is provided with a plurality of snap-fit ​​portions, the drive body has a stepped portion at one end near the latch, the snap-fit ​​portions can be engaged with the stepped portion, and the spring abutment portion is formed on the snap-fit ​​portion.

4. The self-locking device for a high-pressure oil tank isolation valve according to claim 1, characterized in that, The shell is provided with an ear plate, which extends outward from the outer periphery of the shell, and the ear plate is provided with a fixing recess for fixing the shell.

5. The self-locking device for a high-pressure oil tank isolation valve according to claim 1, characterized in that, The housing is provided with an ear plate, which extends outward from the outer periphery of the housing, and the ear plate is provided with positioning holes and fixing holes.

6. The self-locking device for a high-pressure oil tank isolation valve according to claim 1, characterized in that, The inner wall of the receiving cavity is provided with a positioning groove, which is arranged along the axis of the receiving cavity, and the driving body has a positioning protrusion that matches the positioning groove.

7. The self-locking device for a high-pressure oil tank isolation valve according to claim 1, characterized in that, The two ends of the flexible conveyor belt are detachably connected to the limiting part and the driving body, respectively.

8. The self-locking device for a high-pressure oil tank isolation valve according to claim 1, characterized in that, The housing is provided with a pressing part at the end away from the return spring. The end of the pressing part has a smooth arc surface. During the movement of the flexible conveyor belt, the smooth arc surface slides in contact with the flexible conveyor belt so that the flexible conveyor belt moves along a fixed path.

9. The self-locking device for a high-pressure oil tank isolation valve according to claim 8, characterized in that, The two ends of the flexible conveyor belt are respectively snapped to the drive body and the limiting part, and / or the width of the pressing part is greater than the width of the flexible conveyor belt.

10. A high-pressure oil tank isolation valve, characterized in that, The high-pressure oil tank isolation valve includes the self-locking device according to any one of claims 1 to 9, and further includes a housing, the housing including an upper chamber and a lower chamber, the self-locking device being located in the upper chamber, the upper chamber communicating with the oil tank, the lower chamber communicating with the carbon canister, a positioning groove for sliding of the flexible conveyor belt being provided on the bottom surface of the upper chamber, and a fixing part being provided in the upper chamber.

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