Dustproof cap and fuel filter with dustproof function

Abstract

The utility model provides a dustproof cap which comprises a round cap body, an annular groove matched with an oil inlet connector of a primary filter is formed in the bottom of the round cap body so as to form a plugging part used for plugging the oil inlet connector, a lifting part is arranged on the top of the round cap body, opposite extending parts are arranged on the side portions of the round cap body, and the annular groove is matched with the oil inlet connector of the primary filter. And the outer circular surface of the extension part is matched with the inner circular surface of the circular connecting part on the outer side of the oil inlet joint. The oil inlet connector is effectively sealed through the plugging part at the bottom of the dustproof cap, meanwhile, extrusion is formed by the inner and outer groove walls of the annular groove and the inner and outer walls of the oil inlet connector, so that the connection firmness is improved, falling caused by vibration and bumping is prevented, and the lifting part at the top of the cap body is convenient to hold by hands and convenient and rapid to take and pull out.

Description

Technical Field

[0001] The invention belongs to the technical field of filters, and in particular relates to a dust cap and a fuel filter with dustproof function. Background Art

[0002] The vehicle filter is an indispensable part of the automobile fuel system, which plays the role of filtering fuel and thus reducing the internal wear of the power system. If the filter is not dust-proofed before being delivered to the automobile manufacturer, it is easy to be contaminated during the transfer and delivery process. For this reason, people take the means of installing a dust plug in the oil inlet joint to prevent dust or other dirt from entering the filter.

[0003] However, the current dust plug is usually assembled into the oil inlet joint by interference fit in order to facilitate removal. Therefore, during the transfer and transportation process, the dust plug is easily loosened due to bumps or vibrations, and eventually falls off. Summary of the invention

[0004] The object of the present invention is to provide a dust cap and a fuel filter with dust-proof function, which are not only easy to plug and unplug, but also have strong sealing performance and are not easy to fall off, thereby effectively preventing the filter from being contaminated.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a dust cap, comprising a circular cap body, the bottom of the circular cap body is provided with an annular groove matching the oil inlet joint of the primary filter to form a sealing portion for sealing the oil inlet joint, the top of the circular cap body is provided with a lifting portion, the side of the circular cap body is provided with a relative extension portion, the outer circular surface of the extension portion matches the inner circular surface of the circular connecting portion on the outside of the oil inlet joint.

[0006] Furthermore, the dust cap is a soft material structure.

[0007] Furthermore, the extension portion has a bottom wall, an outer wall, a side wall and connecting ribs, the bottom wall extends radially outward from the bottom of the circular cap body, the side wall is vertically connected to the side edge of the bottom wall and connected to the circular cap body, the outer wall is an arc-shaped wall, which is vertically connected to the outer edge of the bottom wall and connected to the side wall, and the connecting ribs are connected to the bottom wall, the circular cap body and the outer wall.

[0008] Furthermore, the lifting portion is a plate-shaped structure.

[0009] The present invention also provides a fuel filter with dustproof function, including a filter frame and a filter, wherein the filter frame has an oil inlet joint and a connecting portion arranged on the outside of the oil inlet joint, and also includes the above-mentioned dust cap, which can be installed on the oil inlet joint in a pluggable manner.

[0010] Furthermore, the filter screen skeleton comprises a first skeleton and a second skeleton which are interlocked and connected with each other, the first skeleton and the second skeleton are both provided with filter screens, and the oil inlet joint and the connecting part are both provided on the first skeleton.

[0011] Furthermore, the edge of the first skeleton has a first skirt, the edge of the second skeleton has a second skirt that can match the first skirt, the bottom of the inner wall of the first skirt has a first protrusion, and the outer wall of the second skirt has a second protrusion that can be snap-connected with the first protrusion.

[0012] Furthermore, the top wall of the first frame is provided with a socket, and the bottom wall of the second frame is provided with a plug that can be plugged into the socket.

[0013] Furthermore, a first supporting rib is disposed on an inner side of the top wall of the first frame, and a second supporting rib corresponding to the first supporting rib is disposed on an inner side of the bottom wall of the second frame.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1) The present invention forms an effective seal on the oil inlet joint through the sealing part at the bottom of the dust cap, and at the same time utilizes the inner and outer groove walls of the annular groove to form an extrusion with the inner and outer walls of the oil inlet joint, thereby improving the connection firmness and preventing it from falling off due to vibration and bumps. The lifting part on the top of the cap body is easy for people to grasp, so it is convenient and quick to take and pull out.

[0016] 2) The extensions on both sides of the dust cap in the present invention can not only serve as force-bearing parts to ensure effective connection between the annular groove and the oil inlet joint, but also form a tight fit with the connecting part on the outside of the oil inlet joint, further improving the anti-slip capability.

[0017] 3) The filter of the present invention can be quickly installed with the dust cap by plugging and unplugging, and the filter itself has an ingenious structure, which is convenient for disassembly, assembly and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural stereogram of Embodiment 1 of the present invention;

[0019] Figure 2 It is a structural explosion diagram of the first embodiment of the present invention;

[0020] Figure 3 A top view of the structure of Embodiment 1 of the present invention;

[0021] Figure 4 for Figure 3 Structural cross-section view along the AA axis;

[0022] Figure 5 for Figure 4Structural cross-section view along the BB direction;

[0023] Figure 6 It is a top perspective view of the second embodiment of the present invention;

[0024] Figure 7 It is a bottom-up stereogram of the second embodiment of the present invention;

[0025] Figure 8 It is a top view of the structure of the second embodiment of the present invention;

[0026] Fig. 9 for Figure 8 Structural cross-section view along CC direction. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention are described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] Embodiment 1: Figures 1 to 5 As shown, the present invention discloses a fuel filter with dustproof function, including a filter skeleton and a filter 4. The filter skeleton has an oil inlet connector 2.5 and a connecting portion 2.6 arranged on the outside of the oil inlet connector 2.5, and the connecting portion 2.6 is provided with a plurality of snap-on structures 2.7 evenly distributed along the circumferential direction, for installation on a fuel pump. The oil inlet connector 2.5 and the connecting portion 2.6 are both annular structures protruding from the surface of the filter skeleton, which are integrally manufactured with the filter skeleton by an injection molding process. A dust cap 1 is installed in the oil inlet connector 2.5, and the two are connected in a pluggable manner. Before the filter is installed on the fuel pump, the dust cap 1 blocks the oil inlet connector 2.5 to prevent the oil inlet connector 2.5 from being contaminated, and the filter can be installed on the fuel pump after the dust cap 1 is pulled out.

[0029] As a preferred example, the filter frame includes a first frame 2 and a second frame 3 that are interlocked and connected, the first frame 2 is provided with a first hollow structure 2.2, the second frame 3 is provided with a second hollow structure 3.2, and the filter frame and the filter 4 are connected by injection molding, so after the filter 4 is covered on the hollow structure, the hollow part can be used to filter out the fuel. The oil inlet connector 2.5 and the connecting part 2.6 are both provided on the first frame 2.

[0030] As a preferred example, the edge of the first frame 2 has a first skirt 2.1, the edge of the second frame 3 has a second skirt 3.1 that can match the first skirt 2.1, the bottom of the inner wall of the first skirt 2.1 has a first protrusion 2.8, and the outer wall 1.5 of the second skirt 3.1 has a second protrusion 3.5 that can be snap-fitted with the first protrusion 2.8. The second skirt 3.1 is smaller than the first skirt 2.1, so when the two are snapped together, the second protrusion 3.5 can press the first protrusion 2.8 outward to move the first protrusion 2.8 outward so that the second protrusion 3.5 can move above the first protrusion 2.8, and then the first skirt 2.1 is reset, the first protrusion 2.8 is located below the first protrusion 2.8 and forms a limit to it, at this time, the first skirt 2.1 is located on the outside and the second skirt 3.1 is located on the inside, and the first frame 2 is snap-fitted with the second frame 3.

[0031] As a preferred example, in order to improve the connection firmness between the first frame 2 and the second frame 3, the top wall of the first frame 2 is provided with a plurality of jacks 2.3, and the bottom wall of the second frame 3 is provided with plugs 3.4 corresponding to the jacks 2.3. The plugs 3.4 are inserted into the jacks 2.3 to form a tight fit, thereby preventing the two frames from being separated.

[0032] As a preferred example, a first support rib 2.4 is provided on the inner side of the top wall of the first frame 2, and a second support rib 3.3 corresponding to the first support rib 2.4 is provided on the inner side of the bottom wall of the second frame 3. Both the first support rib 2.4 and the second support rib 3.3 play a supporting role. After the first frame 2 and the second frame 3 are buckled, the first support rib 2.4 contacts the inner side of the bottom wall of the second frame 3, and similarly, the second support rib 3.3 contacts the inner side of the top wall of the first frame 2.

[0033] Embodiment 2: Figures 6 to 9 As shown, a dust cap 1 includes a circular cap body 1.1, the bottom of the circular cap body 1.1 is provided with an annular groove 1.2 matching the oil inlet connector 2.5 of the primary filter, thereby forming a sealing portion 1.3 for sealing the oil inlet connector 2.5, the top of the circular cap body 1.1 is provided with a lifting portion 1.9, and the side of the circular cap body 1.1 is provided with a relative extension portion 1.4, and the outer circular surface of the extension portion 1.4 matches the inner circular surface of the circular connecting portion 2.6 on the outer side of the oil inlet connector 2.5. The sealing portion 1.3 blocks the oil inlet connector 2.5, while the annular groove 1.2 contacts the inner and outer circular surfaces of the oil inlet connector 2.5 and uses the extrusion force to improve the connection strength between the dust cap 1 and the oil inlet connector 2.5, effectively preventing the two from detaching. The extension portion 1.4 provides a connecting force between the dust cap 1 and the connecting portion 2.6, further preventing the dust cap 1 from falling off. At the same time, when installing the dust cap 1, the extension portion 1.4 can be pressed to achieve a complete blocking fit between the annular groove 1.2 and the oil inlet connector 2.5.

[0034] As a preferred example, the dust cap 1 is a soft material structure. Specifically, the dust cap 1 is made of medical PVC or rubber, which can achieve blocking and is easy to remove and plug.

[0035] As a preferred example, the extension portion 1.4 has a bottom wall 1.8, an outer wall 1.5, a side wall 1.6 and a connecting rib 1.7. The bottom wall 1.8 extends radially outward from the bottom of the circular cap body 1.1. The side wall 1.6 is vertically connected to the side edge of the bottom wall 1.8 and connected to the circular cap body 1.1. The outer wall 1.5 is an arc-shaped wall, which is vertically connected to the outer edge of the bottom wall 1.8 and connected to the side wall 1.6. The connecting rib 1.7 is connected to the bottom wall 1.8, the circular cap body 1.1 and the outer wall 1.5. The side wall 1.6 can increase the contact area between the extension portion 1.4 and the connecting portion 2.6, thereby improving the bonding force between the two. The connecting rib 1.7 can support the side wall 1.6 and improve its strength, so that it can form a tight fit with the inner circular surface of the connecting portion 2.6.

[0036] As a preferred example, the lifting portion 1.9 is a plate-shaped structure, which is convenient for users to clamp and lift.

[0037] The matters not described in detail in the present invention are all known technologies to those skilled in the art.

[0038] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified and replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A dust cap, characterized in that: It includes a circular cap body, the bottom of which is provided with an annular groove matching the oil inlet joint of the primary filter to form a sealing portion for sealing the oil inlet joint, the top of the circular cap body is provided with a lifting portion, and the side of the circular cap body is provided with a relative extension portion, and the outer circular surface of the extension portion matches the inner circular surface of the circular connecting portion on the outside of the oil inlet joint.

2. A dust cap according to claim 1, characterized in that: The dust cap is a soft material structure.

3. A dust cap according to claim 1, characterized in that: The extension portion comprises a bottom wall, an outer wall, a side wall and connecting ribs, the bottom wall extends radially outward from the bottom of the circular cap body, the side wall is vertically connected to the side edge of the bottom wall and connected to the circular cap body, the outer wall is an arc-shaped wall, which is vertically connected to the outer edge of the bottom wall and connected to the side wall, and the connecting ribs are connected to the bottom wall, the circular cap body and the outer wall.

4. A dust cap according to claim 2 or 3, characterized in that: The lifting portion is a plate-shaped structure.

5. A fuel filter with dustproof function, comprising a filter frame and a filter, wherein the filter frame has an oil inlet joint and a connecting portion arranged outside the oil inlet joint, characterized in that: It also includes a dust cap as claimed in claim 1, wherein the dust cap is installed on the oil inlet joint in a pluggable manner.

6. A fuel filter with dustproof function according to claim 5, characterized in that: The filter screen frame comprises a first frame and a second frame which are buckled and connected to each other, the first frame and the second frame are both provided with filter screens, and the oil inlet joint and the connecting part are both provided on the first frame.

7. A fuel filter with dustproof function according to claim 6, characterized in that: The edge of the first frame has a first skirt, the edge of the second frame has a second skirt that can match the first skirt, the bottom of the inner wall of the first skirt has a first protrusion, and the outer wall of the second skirt has a second protrusion that can be snap-fitted with the first protrusion.

8. The fuel filter with dustproof function according to claim 6, characterized in that: The top wall of the first frame is provided with a socket, and the bottom wall of the second frame is provided with a plug that can be plugged into the socket.

9. The fuel filter with dustproof function according to claim 6, characterized in that: A first supporting rib is disposed on the inner side of the top wall of the first frame, and a second supporting rib corresponding to the first supporting rib is disposed on the inner side of the bottom wall of the second frame.

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