Filter element connecting structure of filter

Abstract

The filter element connecting structure comprises a filter element bayonet end cover and a filter shell bayonet connecting piece which are coaxial and provided with center holes, one end of the filter shell bayonet connecting piece is connected with a filter shell sleeve in a clamped mode, at least two tensioning cams are arranged on the circumference of the filter shell bayonet connecting piece, and the tensioning cams are connected with the filter shell bayonet connecting piece in a clamped mode. The filter shell sleeve is provided with clamping grooves which are matched with the tensioning convex blocks and have the corresponding number, the inner ring of the filter shell bayonet connecting piece is provided with internal threads, the filter element bayonet end cover is provided with external threads matched with the internal threads, the position, matched with the filter shell bayonet connecting piece, of the filter element bayonet end cover is provided with a tensioning part, and the tensioning part is connected with the filter shell bayonet connecting piece. And the filter shell bayonet connecting piece rotates along with the matching of the internal thread and the external thread and is matched with the tensioning part, so that the outer diameter of the tensioning convex block is enlarged and the tensioning convex block is fixedly connected with the filter shell sleeve. The device is simple in structure and convenient to operate.

Description

Technical Field

[0001] The utility model relates to the technical field of filters, in particular to a filter element connection structure of a filter. Background Art

[0002] In order to facilitate the disassembly, installation and replacement of a filter element, a filter needs to be equipped with a connector during installation. Most of the existing filter element connectors of filters are detachably and fixedly connected by a filter element bayonet end cover and a filter housing bayonet connector; among them, the filter element is inserted into the filter element bayonet end cover, and the housing part of the filter is fixedly connected to the filter housing bayonet connector. Most of the existing filter element connectors are plane-sealed connections. During actual use, the following problems exist: the connection between the filter element bayonet end cover and the filter housing bayonet connector is not tight enough, the sealing performance and stability are poor, the structure is complex, and it is inconvenient to disassemble and assemble. Summary of the Utility Model

[0003] In order to solve the problems of the above-mentioned prior art, the utility model provides a filter element connection structure of a filter, which has a simple structure, convenient operation and tight connection.

[0004] The adopted technical solution is as follows:

[0005] A filter element connection structure of a filter includes a filter element bayonet end cover and a filter housing bayonet connector which are coaxial and both are provided with central holes. One end of the filter housing bayonet connector is provided with a filter housing sleeve in a clamping manner. At least two tensioning convex blocks are arranged on the circumference of the filter housing bayonet connector. The filter housing sleeve is provided with a corresponding number of clamping grooves which are matched with the tensioning convex blocks. The inner ring of the filter housing bayonet connector is provided with internal threads, and the filter element bayonet end cover is provided with external threads which are matched with the internal threads. A tensioning part is arranged at the position corresponding to the cooperation between the filter element bayonet end cover and the filter housing bayonet connector. With the rotation of the filter housing bayonet connector along with the cooperation of the internal threads and the external threads, the cooperation with the tensioning part can make the outer diameter of the tensioning convex blocks expand and be tightly connected with the filter housing sleeve.

[0006] Furthermore, a first limiting convex platform is arranged at one end of the tensioning convex block connected to the filter element bayonet end cover; a second limiting convex platform is arranged at the other end of the tensioning convex block. An annular groove is formed between the first and second limiting convex platforms.

[0007] Furthermore, an annular convex strip which is matched with the annular groove is arranged on the filter housing sleeve.

[0008] Furthermore, a notch can be arranged on the second limiting convex platform.

[0009] Furthermore, the filter element bayonet end cover and the filter housing bayonet connector are made of plastic materials.

[0010] Furthermore, the tensioning part is arranged on the tensioning convex block or / and the filter element bayonet end cover.

[0011] Furthermore, the tension bumps and / or the filter element bayonet end cover are / is provided with a conical shape.

[0012] Furthermore, there are four tension bumps.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] The present utility model provides a filter element connection structure for a filter, including a filter element bayonet end cover, a filter housing bayonet connector, and a filter housing sleeve. The filter housing sleeve and the filter housing bayonet connector are snap-connected through the cooperation of tension bumps and a card slot. An internal thread is provided in the tension bumps provided on the filter housing bayonet connector, and an external thread is provided on the filter element bayonet end cover. The internal thread cooperates with the external thread. A tension portion is provided at the corresponding position between the filter housing bayonet connector and the filter element bayonet end cover. The tension portion can be provided on the tension bumps and / or the filter element bayonet end cover. Rotating the filter element bayonet end cover can drive the tension bumps to expand outwards, that is, the outer diameter increases, so that the filter housing bayonet connector and the filter housing sleeve are tightly connected. The structure of the present utility model is simple, the operation is convenient, it is easy to install and disassemble, and it has good sealing performance and tight connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0016] Figure 2 is a schematic diagram of a partial structure of the present utility model;

[0017] Figure 3 is a disassembly schematic diagram of the present utility model;

[0018] Figure 4 is a top view of the filter housing sleeve;

[0019] Figure 5 is a schematic diagram of the overall structure of the present utility model from another angle;

[0020] Among them, filter element bayonet end cover 1, filter housing bayonet connector 2, annular groove 201, filter housing sleeve 3, annular rib 301, card slot 302, tension bump 4, internal thread 5, external thread 6, first limit boss 7, second limit boss 8, inclined surface 9. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The following further describes the present utility model in conjunction with specific embodiments.

[0022] Refer to Figures 1-5, A filter element connection structure for a filter, comprising a filter element bayonet end cap 1 and a filter housing bayonet connector 2 that are coaxial and both have a central hole. One end of the filter housing bayonet connector 2 is snap-fitted with a filter housing sleeve 3. At least two tensioning bumps 4 are provided on the circumference of the filter housing bayonet connector 2. The filter housing sleeve 3 is provided with a corresponding number of card slots 302 that cooperate with the tensioning bumps 4. An internal thread 5 is provided on the inner circle of the filter housing bayonet connector 2. An external thread 6 that mates with the internal thread is provided on the filter element bayonet end cap. A tensioning portion is provided at the corresponding position of the filter element bayonet end cap 1 that cooperates with the filter housing bayonet connector 2. As the internal thread and the external thread cooperate and rotate, the filter housing bayonet connector 2 cooperates with the tensioning portion, enabling the outer diameter of the tensioning bumps 4 to expand and be tightly connected to the filter housing sleeve 3.

[0023] One end of the tensioning bump 4 connected to the filter element bayonet end cap 1 is provided with a first limiting boss 7; the other end of the tensioning bump 4 is provided with a second limiting boss 8. A ring groove 201 is formed between the first and second limiting bosses. The filter housing sleeve 3 is provided with an annular rib 301 that cooperates with the ring groove. The annular rib 301 is snapped into the ring groove 201, and the first and second limiting bosses 7 are provided to make the connection between the filter housing sleeve 3 and the filter housing bayonet connector 2 tighter.

[0024] The filter housing sleeve 3 is sleeved outside the filter housing bayonet connector 2. During installation, the filter housing bayonet connector 2 is snapped into the filter housing sleeve 3, and the tensioning bumps 4 cooperate with the card slots 302 on the filter housing bayonet connector 2; the ring groove 201 cooperates with the filter housing bayonet connector 2.

[0025] Preferably, the tensioning portion is provided on the tensioning bump 4 or / and the filter element bayonet end cap 1.

[0026] The filter element bayonet end cap 1 and the filter housing bayonet connector 2 are connected by a thread. By rotating the filter element bayonet end cap 1, the external thread mates with the internal thread, enabling the tensioning bumps 4 to expand, that is, the outer diameter of the tensioning bumps 4 increases. The increase in the outer diameter of the tensioning bumps 4 enables them to be tightly connected to the filter housing sleeve 3. The filter element is inserted into the filter element bayonet end cap 1, and the housing of the filter and the filter element bayonet end cap 1 can be connected by bolts. The tight connection between the filter element bayonet end cap 1 and the filter housing sleeve 3 enables the filter element to be installed on the filter housing. During disassembly, directly rotate to separate the filter element bayonet end cap 1 from the filter housing bayonet connector 2. The installation and disassembly are convenient, the structure is simple, and the processing is convenient.

[0027] Preferably, the filter element bayonet end cap 1 and the filter housing bayonet connector 2 are made of plastic material. Using plastic material, the processing is convenient, the cost is low, the filter housing bayonet connector 2 can be deformed, and the tensioning bumps can expand.

[0028] Preferably, a notch may be provided on the second limiting boss 8. The provision of the notch can increase the outer diameters of the first and second limiting bosses. When the filter housing sleeve 3 is installed, the filter housing bayonet connector 2 is squeezed, causing the notch to shrink, facilitating the installation of the filter housing sleeve 3. After the filter housing sleeve 3 is sleeved onto the filter housing bayonet connector 2, the notch resumes its original size, and the outer diameters of the first and second limiting bosses 8 expand, resulting in a better limiting effect and a tighter connection between the filter housing sleeve 3 and the filter housing bayonet connector 2.

[0029] Preferably, the tensioning protrusion 4 or / and the filter element bayonet end cap 1 are provided in a conical shape, that is, the internal thread on the inner wall of the tensioning protrusion 4 or / and the external thread 6 on the outer wall of the filter element bayonet end cap 1 are provided in a conical shape. In this embodiment, a taper is provided at the internal thread, that is, an inclined surface 9 is provided on the inner wall of the tensioning protrusion. When the filter element bayonet end cap 1 rotates, the external thread rotates and rises towards the direction of the second limiting boss, which will drive the outer diameter of the tensioning protrusion 4 to gradually increase and expand outwards, so that the filter housing bayonet connector 2 and the filter housing sleeve 3 are tightly connected.

[0030] Of course, a taper may also be provided at the external thread, or tapers may be provided at both the internal and external threads simultaneously, as long as it is satisfied that the outer diameter of the tensioning protrusion 4 can expand as the internal and external threads cooperate and rotate. The outer diameter of the tensioning protrusion 4 after expansion needs to be greater than the outer diameter at the start of introduction.

[0031] Preferably, four tensioning protrusions 4 are provided. The more the number of tensioning protrusions 4 is set, the tighter the connection between the filter housing bayonet connector 2 and the filter housing sleeve 3.

[0032] The above are only optional embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. All equivalent structural transformations made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A filter element connection structure for a filter, comprising a filter element bayonet end cap (1) and a filter housing bayonet connector (2) that are coaxial and both provided with central holes, characterized in that: One end of the filter housing bayonet connector (2) is snap-connected with a filter housing sleeve (3). At least two tensioning protrusions (4) are provided on the circumference of the filter housing bayonet connector (2). The filter housing sleeve (3) is provided with a corresponding number of card slots (302) that cooperate with the tensioning protrusions (4). An internal thread (5) is provided on the inner circle of the filter housing bayonet connector (2). An external thread (6) that cooperates with the internal thread is provided on the filter element bayonet end cover. A tensioning portion is provided at the corresponding position of the filter element bayonet end cover (1) that cooperates with the filter housing bayonet connector (2). The filter housing bayonet connector (2) can cooperate with the tensioning portion as it rotates with the cooperation of the internal thread and the external thread, so that the outer diameter of the tensioning protrusion (4) expands to be tightly connected with the filter housing sleeve (3).

2. The filter element connection structure of the filter as claimed in claim 1, wherein: A first limiting protrusion (7) is provided at one end of the tensioning protrusion (4) connected to the filter element bayonet end cover (1); a second limiting protrusion (8) is provided at the other end of the tensioning protrusion (4). A ring groove (201) is formed between the first and second limiting protrusions.

3. The filter element connection structure of the filter according to claim 2, characterized in that: A ring-shaped rib (301) that cooperates with the ring groove is provided on the filter housing sleeve (3).

4. The filter element connection structure of the filter according to claim 2, characterized in that: A notch may be provided on the second limiting protrusion (8).

5. The filter element connection structure of the filter as claimed in claim 1, wherein: The filter element bayonet end cover (1) and the filter housing bayonet connector (2) are made of plastic material.

6. The filter element connection structure of the filter according to claim 1, characterized in that: The tensioning portion is provided on the tensioning protrusion (4) or / and the filter element bayonet end cover (1).

7. The filter element connection structure of the filter according to claim 6, characterized in that: The tensioning protrusion (4) or / and the filter element bayonet end cover (1) are arranged in a conical shape.

8. The filter element connection structure of the filter according to claim 1, characterized in that: Four tensioning protrusions (4) are provided.

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