Quick release device of fuel metering valve

Abstract

The quick release device of the fuel metering valve comprises a support, the support comprises two side plates arranged oppositely and a top plate connected with the two side plates, and a U-shaped operation space is defined by the two side plates and the top plate; the assembling rod vertically penetrates through the top plate, and the tail end of the assembling rod is located in the working space; the clamping block is arranged at the tail end of the assembling rod in a threaded sleeving mode, and the clamping block is provided with a clamping opening matched with a cover body of the fuel metering valve; a first protruding block and a second protruding block which are clamped with the outer end edge of the cover body in the axial direction of the assembling rod are arranged in the bayonet, the first protruding block is at least provided with a first face abutting against the cover body, the second protruding block is at least provided with a second face abutting against the cover body, and the first face and the second face are obliquely crossed in the axial direction of the assembling rod. The limiting block is arranged at the head end of the assembly rod in a sleeving manner; the assembling rod is configured to rotate around the axis under the action of external force so that the clamping block can move upwards or downwards on the assembling rod in the axial direction of the assembling rod. The fuel metering valve can be quickly disassembled, and operation is easy.

Description

Technical Field

[0001] The utility model relates to the technical field of injectors, and particularly relates to a quick-disassembly device for a fuel metering valve. Background Art

[0002] The fuel metering valve is a core component in an engine or a fuel cell device. According to the operating conditions of the engine, the pulse width duty ratio of the fuel metering valve is adjusted through an ECU (Electronic Control Unit), and the gas injection amount is controlled to ensure that the engine operates at a set air-fuel ratio. Usually, the fuel can be natural gas, hydrogen fuel, or renewable gas fuel, etc. During the working process of the fuel metering valve, higher requirements are imposed on its precise flow control and airtightness. Most of the outer shells of traditional fuel metering valves are of an integral structure, and the integral structure of the outer shell has high requirements for processing accuracy, high processing costs, and is not convenient for processing, resulting in low processing efficiency.

[0003] To solve the above problems, a Chinese patent with the application number 202222365883.9 discloses a fuel metering valve, which includes a cover body, a first outer shell, a second outer shell, and an electromagnetic coil arranged in the first outer shell. The pins on the electromagnetic coil pass through the cover body to be plugged into a vehicle controller. By separately setting the shell as the first outer shell and the second outer shell, the processing difficulty and the requirements for processing accuracy are reduced, the processing efficiency is improved, and costs are saved.

[0004] However, the fuel metering valve needs to be sealed and fixed with the engine or the fuel cell device to ensure safety. Therefore, its subsequent disassembly is relatively troublesome, and a certain disassembly force needs to be applied to correctly separate it. In addition, the engine or the fuel cell device has a complex structure and many parts. In order to reduce the volume, all parts are arranged compactly, and the available disassembly space is limited. This makes it difficult for ordinary tools and the hands of operators to smoothly disassemble the fuel metering valve, resulting in troublesome and time-consuming operations. Moreover, ordinary tools usually clamp the cover body radially, which easily causes deformation and damage to the cover body, affecting the reuse of the fuel metering valve.

[0005] Therefore, it is necessary to design a quick-disassembly device for disassembling the above fuel metering valve. Summary of the Utility Model

[0006] The purpose of the utility model is to provide a quick-disassembly device for a fuel metering valve to solve the problem that it is difficult for ordinary tools and operators to smoothly disassemble the fuel metering valve due to the complex structure of the engine or the fuel cell device and the high installation requirements of the fuel metering valve in the prior art. The quick-disassembly device can realize the quick disassembly of the fuel metering valve, and can simplify the operation, improve the efficiency, and reduce the requirements for tools and operators during the disassembly process.

[0007] To achieve the above object, the technical solution adopted by the present utility model is as follows:

[0008] A quick-release device for a fuel metering valve, comprising:

[0009] A bracket for being erected above the fuel metering valve to be disassembled, comprising two oppositely arranged side plates and a top plate connecting the two side plates, and a "U"-shaped working space is formed by enclosing the two side plates and the top plate;

[0010] An assembly rod vertically penetrates through the top plate, and the tail end is located in the working space;

[0011] A clamping block is threadedly sleeved on the tail end of the assembly rod, and the clamping block has a bayonet matching with the cover body of the fuel metering valve; a first convex block and a second convex block are arranged in the bayonet and are axially engaged with the outer end edge of the cover body along the assembly rod, the first convex block at least has a first surface abutting against the cover body, the second convex block at least has a second surface abutting against the cover body, and the first surface and the second surface are obliquely intersected with the axis of the assembly rod;

[0012] A limiting block is sleeved on the head end of the assembly rod for limiting the assembly rod to disengage from the top plate in the length direction;

[0013] The assembly rod is configured to rotate around the axis under an external force, so that the clamping block moves upward or downward along the axis of the assembly rod on the assembly rod.

[0014] In some embodiments, one of the first surface and the second surface abuts against the lower surface of the cover body, and the other abuts against the upper surface of the cover body.

[0015] In some embodiments, the first convex block and the second convex block are oppositely arranged in the bayonet.

[0016] In some embodiments, in a direction perpendicular to the axis of the assembly rod, the contour lines of the orthographic projections of the first surface and the second surface are adapted to the contour line of the orthographic projection of the cover body.

[0017] In some embodiments, a threaded section is provided at the tail end of the assembly rod, and the length of the threaded section is less than the distance from the top surface of the clamping block to the bayonet.

[0018] In some embodiments, an operation handle is further included, and the operation handle is sleeved on the head end of the assembly rod and is located on the side of the limiting block away from the clamping block.

[0019] In some embodiments, an assembly hole for the assembly rod to pass through is provided on the top plate, and the assembly hole is an oval hole.

[0020] In some embodiments, the length direction of the kidney-shaped hole is arranged along the length direction of the top plate.

[0021] In some embodiments, the width of the clamping block is greater than the distance between the two side plates.

[0022] In some embodiments, chamfers are provided on the edges of the bracket and the clamping block.

[0023] Due to the application of the above technical solutions, the beneficial effects of the present application compared with the prior art are as follows:

[0024] The quick-release device of the present application has the advantages of simple overall structure and low manufacturing cost. By setting the bracket, stable supporting force is provided for the whole device, thus ensuring the safe progress of the disassembly process. Compared with the method of directly pulling out the fuel metering valve in the prior art, in this device, through the threaded connection between the clamping block and the assembly rod, the rotational motion is converted into linear motion, reducing the difficulty of the pulling-out operation and improving the smoothness and accuracy. The rotational motion can transmit force more evenly, thereby reducing friction and resistance and making the disassembly process smoother. In addition, the first convex block and the second convex block provided in the clamping block are engaged with the cover body in the axial direction of the assembly rod. This axial engagement method is more stable than the traditional radial engagement, reducing the displacement or loosening of the cover body, and being able to better disperse and transmit the load, reducing the risk of deformation or damage of the cover body. Description of the Drawings

[0025] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0026] Figure 1 It is a schematic structural diagram of the quick-release device in the embodiment of the present application;

[0027] Figure 2 It is a schematic cross-sectional structural diagram of the quick-release device in the embodiment of the present application;

[0028] Figure 3 It is a schematic cross-sectional structural diagram of the quick-release device in the embodiment of the present application after being engaged with the cover body.

[0029] Description of the Reference Numerals

[0030] 1 - Bracket; 11 - Side plate; 12 - Top plate; 2 - Assembly rod; 3 - Clamping block; 4 - Bayonet; 5 - First convex block; 51 - First surface; 6 - Second convex block; 61 - Second surface; 7 - Limit block; 8 - Assembly hole; 9 - Threaded section; 10 - Operating handle; 100 - Cover body; 101 - Main body portion; 102 - Protruding portion. Detailed implementation manners

[0031] In order to enable those skilled in the art of this technology to better understand the solutions of this application, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of this application.

[0032] It should be noted that the terms "first", "second", etc. in the description and claims of this application and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily need to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so as to implement the embodiments of this application described here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0033] In this application, the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", etc. is based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present utility model and its embodiments, and are not used to limit that the indicated device, element or component must have a specific orientation or be constructed and operated in a specific orientation.

[0034] Moreover, in addition to being able to represent an orientation or positional relationship, some of the above terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the present utility model can be understood according to specific circumstances.

[0035] In addition, the terms "installed", "set up", "provided with", "connected", "linked", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0036] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The following will detail this application with reference to the accompanying drawings and in conjunction with the embodiments.

[0037] Please refer to Figure 3 , an embodiment of the present application provides a quick-release device for a fuel metering valve. The fuel metering valve includes a cover body 100, a first outer shell, a second outer shell, and an electromagnetic coil disposed in the first outer shell. The pins on the electromagnetic coil pass through the cover body 100 to be plugged into a vehicle controller.

[0038] The cover body 100 includes a main body portion 101 and a protruding portion 102. An opening for the pins to pass through is provided on the main body portion 101. The protruding portion 102 extends from the opening in the axial direction of the pins to surround the side of the pins. The protruding portion 102 gradually slopes upward from near the main body portion 101 to away from the main body portion 101. The lower surface of the following cover body 100 is the lower surface of the protruding portion 102, and the upper surface of the cover body 100 is the upper surface of the main body portion 101.

[0039] Please refer to Figure 1 and Figure 2 , the quick-release device includes a bracket 1, an assembly rod 2, a block 3 threadedly sleeved on the tail end of the assembly rod 2, and a limit block 7. In some embodiments, chamfers are provided on the edges of the bracket 1 and the block 3. The chamfering treatment can eliminate sharp edges and avoid harm to the operator and the device during the operation.

[0040] Specifically, the bracket 1 is used to be erected above the fuel metering valve to be disassembled, and includes two relatively arranged side plates 11 and a top plate 12 connecting the two side plates 11. The two side plates 11 and the top plate 12 enclose a "U"-shaped working space.

[0041] The assembly rod 2 vertically penetrates through the top plate 12, and the tail end is located in the working space. The assembly rod 2 is configured to rotate around the axis under an external force, so that the block 3 moves upward or downward along the axial direction of the assembly rod 2 on the assembly rod 2. Specifically, an assembly hole 8 for the assembly rod 2 to pass through is provided on the top plate 12.

[0042] The limit block 7 is sleeved on the head end of the assembly rod 2 and is used to limit the assembly rod 2 from disengaging from the top plate 12 in the length direction. The shape of the limit block 7 is not specifically limited in this application.

[0043] As described above, a threaded section 9 is provided at the tail end of the assembly rod 2, and the length of the threaded section 9 is less than the distance from the top surface of the clamping block 3 to the bayonet 4. This ensures that the threaded section 9 will not interfere with the fixing area of the clamping block 3 during the assembly process. This design can prevent the threaded section 9 from conflicting with the upper surface of the cover body 100 when being screwed in, thereby ensuring that the first convex block 5 and the second convex block 6 can be firmly engaged with the cover body 100 and the disassembly process is smooth.

[0044] In some embodiments, the assembly hole 8 is an oblong hole, and the length direction of the oblong hole is arranged along the length direction of the top plate 12. By setting the assembly hole 8 as an oblong hole, the assembly rod 2 can move within a certain range, providing an adjustment space for the clamping block 3 to facilitate precise alignment or adjustment.

[0045] In some embodiments, an operating handle 10 is further included. The operating handle 10 is sleeved on the head end of the assembly rod 2 and is located on the side of the limit block 7 away from the clamping block 3. For the convenience of operation, the shape of the operating handle 10 is not specifically limited in this application.

[0046] The clamping block 3 has a bayonet 4 that cooperates with the cover body 100 of the fuel metering valve. Specifically, the bayonet 4 is provided with a first convex block 5 and a second convex block 6 that are axially engaged with the outer end edge of the cover body 100 along the assembly rod 2. The first convex block 5 at least has a first surface 51 that abuts against the cover body 100, and the second convex block 6 at least has a second surface 61 that abuts against the cover body 100. The first surface 51 and the second surface 61 are obliquely intersecting with the axial direction of the assembly rod 2. It should be noted that perpendicularity is a special case of oblique intersection. Specifically, one of the first surface 51 and the second surface 61 abuts against the lower surface of the cover body 100, and the other abuts against the upper surface of the cover body 100.

[0047] In some embodiments, the width of the clamping block 3 is greater than the distance between the two side plates 11.

[0048] In some embodiments, the first convex block 5 and the second convex block 6 are oppositely arranged in the bayonet 4. To provide more uniform support and increase the stability of the device. This design can better disperse the force and reduce deformation or damage caused by uneven force.

[0049] In some embodiments, in the direction perpendicular to the axial direction of the assembly rod 2, the contour lines of the orthographic projections of the first surface 51 and the second surface 61 are adapted to the contour line of the orthographic projection of the cover body 100. This can prevent misalignment during engagement and improve the stability after engagement.

[0050] Due to the application of the above technical solutions, the beneficial effects of this application compared with the prior art are as follows:

[0051] The quick-release device of the present application has the advantages of simple overall structure and low manufacturing cost. By setting up the bracket, stable supporting force is provided for the whole device, thus ensuring the safe progress of the disassembly process. Compared with the method of directly pulling out the fuel metering valve in the prior art, in this device, through the threaded connection between the clamping block and the assembly rod, the rotational motion is converted into linear motion, which reduces the difficulty of the pulling-out operation and improves the smoothness and accuracy. The rotational motion can transmit force more evenly, thus reducing friction and resistance and making the disassembly process smoother. In addition, the first convex block and the second convex block arranged in the clamping block are engaged with the cover body in the axial direction of the assembly rod. This axial engagement method is more stable than the traditional radial engagement, reduces the displacement or loosening of the cover body, and can better disperse and transmit the load, reducing the risk of deformation or damage of the cover body.

[0052] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A quick release device for a fuel metering valve, characterized in that: include: The bracket is used to be erected above the fuel metering valve to be disassembled, and includes two side plates arranged opposite to each other and a top plate connecting the two side plates, wherein the two side plates and the top plate enclose a "U"-shaped working space; An assembly rod is vertically inserted into the top plate, and its tail end is located in the working space; A clamping block is threadedly sleeved on the tail end of the assembly rod, and the clamping block has a bayonet matched with the cover body of the fuel metering valve; a first convex block and a second convex block are arranged in the bayonet, which are engaged with the outer end of the cover body in the axial direction of the assembly rod, the first convex block at least has a first surface abutting against the cover body, and the second convex block at least has a second surface abutting against the cover body, and the first surface and the second surface are oblique to the axial direction of the assembly rod; A limit block, sleeved on the head end of the assembly rod, for limiting the assembly rod from being separated from the top plate in the length direction; The assembly rod is configured to rotate around an axis under the action of an external force, so that the clamping block moves upward or downward on the assembly rod along the axial direction of the assembly rod.

2. A quick release device for a fuel metering valve as claimed in claim 1, characterized in that: One of the first surface and the second surface abuts against the lower surface of the cover body, and the other abuts against the upper surface of the cover body.

3. A quick release device for a fuel metering valve as claimed in claim 2, characterized in that: The first protrusion and the second protrusion are arranged opposite to each other in the bayonet.

4. A quick release device for a fuel metering valve as claimed in claim 3, characterized in that: In a direction perpendicular to the axial direction of the assembly rod, contour lines of the orthographic projections of the first surface and the second surface match contour lines of the orthographic projection of the cover body.

5. A quick release device for a fuel metering valve as claimed in claim 1, characterized in that: The tail end of the assembly rod is provided with a threaded section, and the length of the threaded section is smaller than the distance from the top surface of the clamping block to the clamping port.

6. A quick release device for a fuel metering valve as claimed in claim 1, characterized in that: It also includes an operating handle, which is disposed on the head end of the assembly rod and is located on a side of the limiting block away from the clamping block.

7. A quick release device for a fuel metering valve as claimed in claim 1, characterized in that: The top plate is provided with an assembly hole for the assembly rod to pass through, and the assembly hole is a waist-shaped hole.

8. A quick release device for a fuel metering valve as claimed in claim 7, characterized in that: The length direction of the waist-shaped holes is arranged along the length direction of the top plate.

9. A quick release device for a fuel metering valve as claimed in claim 1, characterized in that: The width of the block is greater than the distance between the two side plates.

10. A quick release device for a fuel metering valve as claimed in claim 1, characterized in that: Chamfers are arranged on the edges of the bracket and the clamping block.

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