Fuel Filter

Abstract

The present invention relates to a fuel filter. The fuel filter comprises a cup-shaped shell with an open end, a cover body, a mounting bracket and a functional device, wherein the cover body closes the shell; the mounting bracket is fixed to the side of the cover body away from the shell; the functional device is fixed to the side of the cover body away from the shell by the mounting bracket; the cover body comprises a structural plate, and a pleated structure for enhancing the elasticity of the structural plate is formed in the area surrounded by the mounting bracket on the structural plate, and the functional device is supported on the pleated structure. In the above-mentioned fuel filter, if the height of the functional device is greater than its assembly height on the mounting bracket, then when assembling the functional device, due to the elasticity of the pleated structure, the functional device presses the pleated structure toward the shell, and then the functional device is installed on the mounting bracket. Therefore, the pleated structure on the structural plate can avoid the problem that the functional device is difficult to assemble, thereby avoiding affecting the operation of the fuel filter.

Description

Technical Field

[0001] The invention relates to filter equipment, in particular to a fuel filter. Background Art

[0002] Fuel usually contains impurities, so the fuel supply system of the automobile engine must have a filter for purifying fuel. The fuel filter includes a housing with an opening, a cover plate, a heater and a mounting bracket. The cover plate is used to close the housing. The mounting bracket is fixed to the side of the cover plate away from the housing. The heater is fixed to the side of the cover plate away from the housing by the mounting bracket, and the heater is used to preheat the fuel entering the housing.

[0003] However, in conventional fuel filters, there is a tendency for a deviation between the height of the heater and the installation height of the mounting bracket, which makes it difficult to assemble the heater, thereby affecting the operation of the fuel filter. Summary of the invention

[0004] Based on this, it is necessary to provide a fuel filter to address the problem that the height of the heater and the installation height of the mounting bracket are easily deviated, which makes the heater difficult to assemble and thus affects the operation of the fuel filter.

[0005] A fuel filter comprises a cup-shaped housing with an open end, a cover, a mounting bracket and a functional device, wherein the cover closes the housing. The mounting bracket is fixed to the side of the cover away from the housing. The functional device is fixed to the side of the cover away from the housing by the mounting bracket. The cover comprises a structural plate, wherein a pleated structure is formed on the structural plate in the area surrounded by the mounting bracket to enhance the elasticity of the structural plate, and the functional device is supported on the pleated structure.

[0006] In the above fuel filter, a pleated structure is formed on the structural plate in the area surrounded by the mounting bracket to enhance the elasticity of the structural plate, and the pleated structure is used to support the functional device. If the height of the functional device is greater than its assembly height on the mounting bracket, when assembling the functional device, the pleated structure has elasticity, and the functional device presses the pleated structure toward the inside of the housing, and then the functional device is mounted on the mounting bracket, thereby avoiding the situation where the functional device is difficult to be mounted on the mounting bracket when the height dimension is large. Therefore, the pleated structure on the structural plate can avoid the problem of the functional device being difficult to assemble, thereby avoiding affecting the operation of the fuel filter.

[0007] In one embodiment, the pleated structure includes annular pleats.

[0008] In one embodiment, the pleated structure includes at least two annular pleats, the axes of all the annular pleats coincide, and two adjacent annular pleats are spaced apart.

[0009] In one embodiment, the cross-section of the annular fold is inverted U-shaped; an opening is provided on the cover body, all the annular folds surround the opening, the inner side wall of the annular fold closest to the axis defines the opening, and the surface of the inner side wall facing the opening forms a sealing surface; the functional device is provided with an extension portion, the extension portion extends into the shell through the opening, and the extension portion is sealed with the sealing surface.

[0010] In one embodiment, the height of the inner side wall of the annular fold closest to the axis relative to the contact surface between the functional device and the annular fold is higher than the height of the outer side wall of the annular fold.

[0011] In one embodiment, a guiding slope is formed between the top surface of the annular fold close to the sealing surface and the sealing surface.

[0012] In one of the embodiments, the functional device includes a heater and a water level detection electrode disposed in the extension portion and extending to the bottom of the housing.

[0013] In one embodiment, the cover body also includes a support plate, which is arranged on a side of the structural plate away from the mounting bracket, and is used to support the structural plate; the inner side wall of the annular fold closest to the axis extends to or beyond the lower surface of the support plate.

[0014] In one embodiment, the structural plate, the mounting bracket and the support plate are connected together by brazing.

[0015] In one embodiment, the corrugated structure is a corrugated structure formed by stamping on the structural plate.

[0016] In one embodiment, the structural plate is connected to an edge corresponding to the opening end of the shell by curling.

[0017] In one of the embodiments, a clamping ring is provided at one end of the mounting bracket away from the housing, and the clamping ring clamps the functional device on the mounting bracket. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of the fuel filter of this embodiment;

[0019] Figure 2 for Figure 1 A schematic diagram of a fuel filter cover and mounting bracket is shown;

[0020] Figure 3 for Figure 1 A partial enlarged view of part A. DETAILED DESCRIPTION

[0021] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0022] Figure 1 FIG. 1 is a schematic diagram of the structure of the fuel filter 100 of this embodiment. Figure 1 As shown, a fuel filter 100 includes a cup-shaped housing 110 with an open end, a cover 120, a functional device 130 and a mounting bracket 140. The cover 120 closes the housing 110. The mounting bracket 140 is fixed to the side of the cover 120 away from the housing 110. In this embodiment, the mounting bracket 140 is fixedly connected to the side of the cover 120 away from the housing 110. The functional device 130 is fixed to the side of the cover 120 away from the housing 110 by the mounting bracket 140. The cover 120 includes a structural plate 121, and a pleated structure 122 is formed on the structural plate 121 in the area surrounded by the mounting bracket 140 to enhance the elasticity of the structural plate 121. The functional device 130 is supported on the pleated structure 122, that is, when the auxiliary functional device is supported on the bracket, the pleated structure is in elastic contact with the auxiliary functional device.

[0023] In the above-mentioned fuel filter 100, a pleated structure 122 is formed on the structural plate 121 in the area surrounded by the mounting bracket 140 to enhance the elasticity of the structural plate 121, and the pleated structure 122 is used to support the functional device 130. If the height of the functional device 130 is greater than its assembly height on the mounting bracket 140, when assembling the functional device 130, due to the elasticity of the pleated structure 122, the functional device 130 presses the pleated structure 122 toward the inside of the housing 110, and then the functional device 130 is mounted on the mounting bracket 140, thereby avoiding the situation where the functional device 130 is difficult to be mounted on the mounting bracket 140 when the height dimension is large. Therefore, the pleated structure 122 on the structural plate 121 can avoid the problem that the functional device 130 is difficult to assemble, thereby avoiding affecting the operation of the fuel filter 100.

[0024] The cover 120 further includes a support plate 123, which is disposed on a side of the structural plate 121 away from the mounting bracket 140. The support plate 123 is used to support the structural plate 121 to prevent deformation of the cover 120 due to the high liquid pressure in the cavity of the housing 110. In addition, the support plate 123 can also enhance the supporting effect of the structural plate 121 on the mounting bracket 140 to prevent deformation of the structural plate 121. An opening 124 is provided on the cover 120 so that the components of the functional device 130 can extend into the interior of the housing 110.

[0025] The structural plate 121 is connected to the edge corresponding to the open end of the shell 110 by curling to further seal the open end of the shell 110, so that the sealing effect of the open end of the shell 110 is better.

[0026] The structural plate 121, the mounting bracket 140 and the support plate 123 are connected together by brazing, and the connection is firm.

[0027] In this embodiment, the functional device 130 is an integrated component. The functional device 130 is provided with an extension portion 131 and a head portion 132 connected to the extension portion. The extension portion 131 extends into the housing 110 through the opening 124 and extends to the bottom of the housing 110. The head portion 132 is arranged outside the housing 110. In this embodiment, the functional device 130 includes a heater arranged in the head portion 132 and a water level detection electrode arranged in the extension portion 131 and extending to the bottom of the housing 110. The heater is used to preheat the fuel entering the housing 110. The water level detection electrode is used to detect the liquid level of water separated from the fuel inside the housing 110.

[0028] It should be noted that the setting of the functional device 130 is not limited to this, and the staff can also set it according to the needs. For example, the extension part 131 is hollow and cylindrical, and the heater is arranged inside the cylindrical extension part. For another example, the functional device 13 only includes the head 132 and the heater or other components located in the head 132. In addition, the functional device can also include other functional elements, such as a pressure sensor, a pressure switch and a blockage detector, etc., to achieve corresponding functions.

[0029] Figure 2 for Figure 1 FIG. 1 is a schematic diagram of the cover 120 and the mounting bracket 140 of the fuel filter 100. Figure 1 and Figure 2The mounting bracket 140 includes an annular support seat 141 and a plurality of support members 142 extending from the support seat 141 in a direction away from the cover body 120. All the support members 142 are evenly distributed in the circumference of the support seat 141, and a socket (not marked) is provided at one end of all the support members 142 away from the support seat 141. A snap ring 143 is provided at one end of the mounting bracket 140 away from the housing 110, and the snap ring 143 clamps the functional device 130 in the mounting bracket 140. In this embodiment, the snap ring 143 is inserted into the socket, so that the snap ring 143 restricts the functional device 130 on the mounting bracket 140. The distance from the snap ring 143 to the cover body 120 should be the assembly height of the functional device 130 on the mounting bracket 140. If the height of the functional device 130 exceeds the assembly height, the functional device 130 will not be able to be mounted on the mounting bracket 140. Therefore, in this embodiment, a pleated structure 122 is provided, and the pleated structure 122 is in elastic contact with the head 132 of the functional device 130. In this way, if the height of the functional device 130 is greater than its assembly height on the mounting bracket 140, when the functional device 130 is assembled, the functional device 130 presses the pleated structure 122 toward the inside of the housing 110, so that the functional device 130 is mounted on the mounting bracket 140, thereby avoiding the situation that the functional device 130 is not easy to be mounted on the mounting bracket 140 when the height dimension is large, and at the same time, the functional device 130 can be fixed on the mounting bracket 140 more stably.

[0030] Figure 3 for Figure 1 A partial enlarged view of part A. Figure 1 , Figure 2 and Figure 3 In this embodiment, the pleated structure 122 is a pleated structure 122 formed by stamping on the structural plate 121. In this way, the processing accuracy and efficiency of the pleated structure 122 can be higher.

[0031] The pleated structure 122 includes annular pleats. The cross section of the annular pleats is inverted U-shaped. In this embodiment, the central axis of the pleated structure 122 coincides with the central axis of the support seat 141 of the mounting bracket 140. While the pleated structure 122 compensates for the height of the functional device 130, the annular pleats form an annular support for the functional device 130, so that the support force of the structural plate 121 on the functional device 130 is uniform, so that the functional device 130 is balanced.

[0032] Specifically, the pleated structure 122 includes at least two annular pleats, the axes of all the annular pleats coincide, and two adjacent annular pleats are arranged at intervals. In this embodiment, there is a preset distance between two adjacent annular pleats. In this way, the multiple annular pleats can share the pressure of the functional device 130 on the structural plate 121. At the same time, due to the relationship between the action force and the reaction force, the functional device 130 is also supported by the multiple annular pleats, so that the structural plate 121 supports the functional device 130 more stably. In this embodiment, the number of annular pleats is two.

[0033] All the annular folds surround the opening 124 of the cover body 120, and the inner side wall 122A of the annular fold closest to the axis defines the opening 124. The surface of the inner side wall 122A facing the opening 124 forms a sealing surface, and the sealing surface and the extension portion 131 are sealed to prevent the liquid inside the housing 110 from leaking. In this embodiment, the height of the sealing surface formed by the surface of the inner side wall 122A facing the opening 124 is relatively large, and even if there is a large error in the installation position of the functional device 130 in the axial direction of the fold structure 122, the sealing between the extension portion 131 of the functional device 130 and the cover body 120 can still be guaranteed. In addition, when the functional device 130 moves relative to the cover body 120 along the axial direction of the fold structure due to automobile vibration, the sealing surface with a relatively large height can also ensure that the functional device 130 and the cover body 120 are always in a sealed state.

[0034] Preferably, the height of the inner side wall 122A of the annular fold closest to the axis relative to the contact surface between the functional device 130 and the annular fold is higher than the height of the outer side wall 122B of the annular fold. Since the inner side wall 122A of the annular fold adjacent to the opening 124 forms a sealing surface, the length of the sealing surface between the extension 131 and the cover body 120 can be further increased.

[0035] Furthermore, the inner side wall 122A of the annular fold closest to the axis extends to or exceeds the lower surface of the support plate 123. The length of the sealing surface is further increased, and the sealing surface is fully supported by the support plate 123 to ensure the sealing effect. In this embodiment, the inner side wall 122A of the annular fold adjacent to the opening 124 extends to the lower surface of the support plate 123.

[0036] A guiding slope 125 is formed between the top surface of the annular fold near the sealing surface and the sealing surface. The guiding slope 125 increases the size of the opening 124. When the extension 131 extends into the housing 110, the guiding slope 125 can quickly guide the extension 131 into the housing 110, thereby saving assembly time of the functional device 130.

[0037] It should be noted that in other embodiments, the shape of the pleated structure 122 is not limited thereto. For example, the pleated structure 122 may also be a dot-shaped protrusion within the area surrounded by the mounting bracket 140, which is easy to manufacture, and the staff can design the shape of the pleated structure 122 according to the requirements.

[0038] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0039] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A fuel filter, comprising: A cup-shaped housing with an open end, a cover, a mounting bracket and a functional device, wherein the cover closes the housing; The mounting bracket is fixed on a side of the cover body away from the shell; the functional device is fixed by the mounting bracket on a side of the cover body away from the shell; It is characterized in that the cover body comprises a construction plate, a pleated structure for enhancing the elasticity of the construction plate is formed on the construction plate in the area surrounded by the mounting bracket, and the functional device is supported on the pleated structure.

2. The fuel filter according to claim 1, characterized in that: The pleated structure includes annular pleats.

3. The fuel filter according to claim 2, characterized in that: The pleated structure includes at least two annular pleats, the axes of all the annular pleats coincide, and two adjacent annular pleats are spaced apart.

4. The fuel filter according to claim 3, characterized in that: The cross section of the annular fold is inverted U-shaped; an opening is formed on the cover body, all the annular folds surround the opening, the inner side wall of the annular fold closest to the axis defines the opening, and the surface of the inner side wall facing the opening forms a sealing surface; The functional device is provided with an extension portion, the extension portion extends into the housing through the opening, and the extension portion is sealed with the sealing surface.

5. The fuel filter according to claim 4, characterized in that: The height of the inner side wall of the annular fold closest to the axis relative to the contact surface between the functional device and the annular fold is higher than the height of the outer side wall of the annular fold.

6. The fuel filter according to claim 4, characterized in that: A guiding slope is formed between the top surface of the annular fold close to the sealing surface and the sealing surface.

7. The fuel filter according to claim 4, characterized in that: The functional device includes a heater and a water level detection electrode disposed in the extension portion and extending to the bottom of the housing.

8. The fuel filter according to claim 4, characterized in that: The cover body also includes a support plate, which is arranged on a side of the construction plate away from the mounting bracket and is used to support the construction plate; the inner side wall of the annular fold closest to the axis extends to or exceeds the lower surface of the support plate.

9. The fuel filter according to claim 1, characterized in that: The corrugated structure is a corrugated structure formed by stamping on the structural plate.

10. The fuel filter according to claim 1, characterized in that A clamping ring is provided at one end of the mounting bracket away from the housing, and the clamping ring clamps the functional device on the mounting bracket.

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