CN216778157U - Fluid filter with filter element dismounting structure - Google Patents

Abstract

The utility model relates to a fluid filter with a filter element dismounting structure, which comprises a fluid filter cover and a fluid filter cylinder which mutually surround to form a filter cavity, and a filter element arranged in the filter cavity, wherein at least 2 turn-buckle structures are arranged on the bottom side of the fluid filter cover at intervals along the circumferential direction, turn-buckle matching structures matched with the turn-buckle structures are arranged on the top side of the filter element at intervals, and the fluid filter cover and the filter element are detachably connected through the turn-buckle structures and the turn-buckle matching structures. Compared with the prior art, the utility model has the advantages of simple and reliable structure, convenient and easy operation and the like, can effectively avoid the problem that the filter element rotates relatively due to the slippage of the buckle in the buckle connecting structure, so that the filter element is not assembled in place or the filter element is damaged and leaked, and ensures that the friction force generated when the filter element is matched with the fluid filter cylinder body is small and the lower sealing element is not easy to damage in the assembling and disassembling process, thereby ensuring the assembly effectiveness of the filter element.

Description

Fluid filter with filter element dismounting structure

Technical Field

The utility model belongs to the technical field of filters, and relates to a fluid filter with a filter element dismounting structure.

Background

At present, when a filter element of a plurality of fluid filters is disassembled and replaced, the problems that an old filter element is difficult to pull out, a new filter element is difficult to install and the like often exist. Chinese patent CN201320842924.7 discloses a fuel filter, which comprises an upper cover, a filter element, a central tube and a shell, wherein the upper cover is integrally sleeved on the central tube after being connected with the filter element; when the filter is in a working state, the lower sealing ring seals an oil return opening in the central pipe, when the filter needs to be replaced and maintained, the filter element moves upwards to drive the lower sealing ring to move upwards, the oil return opening is opened, and fuel in the filter flows out after sequentially passing through the oil return opening and the oil return channel. Compared with the prior art, the utility model has the advantages of environmental protection, cost saving, convenient operation and the like. But because the upper cover, namely the fluid filter cover is connected with the filter element through the buckle structure, the upper cover is not easy to be clamped or loosened; when the filter element is fitted too tightly to the housing, i.e. the fluid filter cartridge, the snap-fit connection is a structure that is subject to the risk of failure, i.e. loosening and not allowing the filter element to exit.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a fluid filter with a filter element dismounting and mounting structure, in particular to a fluid filter which realizes the simple, convenient and quick dismounting and mounting of a filter element and a fluid filter cover as a whole by adding a turnbuckle structure on the fluid filter cover and the filter element, can also carry out the filter element quickly and efficiently by the structure, and is easy to realize the connection and the loosening operation between the fluid filter cover and the filter element.

The purpose of the utility model can be realized by the following technical scheme:

the utility model provides a take fluid filter of filter core dismouting structure, includes fluid filter lid and the fluid filter barrel that surrounds each other and form filter cavity to and locate the filter core in the filter cavity, wherein the bottom side of fluid filter lid on along circumference interval laid 2 at least spiral shell structure, filter core top side interval laid with spiral shell structure looks adaptation spiral shell structure cooperation structure, fluid filter lid and filter core between can dismantle through spiral shell structure and spiral shell cooperation structure and be connected.

As a preferred technical scheme, the screwing structure and the screwing matching structure can be plastic parts or metal parts.

Furthermore, the screwing structure comprises a screwing extension part arranged at the bottom side of the fluid filter cover and a screwing connecting part arranged at the bottom end of the screwing extension part and extending inwards along the radial direction;

the rotary buckle matching structure comprises a rotary buckle matching extension part arranged on the top side of the filter element and a rotary buckle matching connection part arranged at the top end of the rotary buckle matching extension part and extending outwards along the radial direction;

the fluid filter cover and the filter element are detachably connected through a rotary buckle connecting part and a rotary buckle matching connecting part which can be in separable contact.

Furthermore, the screwing connection part and the screwing matching connection part are plate-shaped connection parts and plate-shaped connection matching parts which extend along the circumferential direction and can be mutually overlapped.

The screwing connection part is a groove-shaped connection part extending along the circumferential direction, and the screwing matching connection part is a plate-shaped connection matching part capable of being embedded into the groove-shaped connection part.

Furthermore, the connecting part of the rotary buckle and the connecting part of the rotary buckle matching are hemispherical connecting parts and hemispherical connecting matching parts, the cross sections of the end parts of the connecting parts of the rotary buckle and the connecting parts of the rotary buckle are hemispherical, extend along the circumferential direction and can be mutually lapped.

Furthermore, the axial extension height of the screwing extension part is greater than the axial thickness of the screwing matching connection part; the axial thickness of the screwing connecting part is smaller than the axial extension height of the screwing matching extension part. Namely, the screwing structure and the screwing matching structure can realize loose matching connection so as to be convenient for disassembly.

Furthermore, a turnbuckle gap is arranged between turnbuckle connecting parts in adjacent turnbuckle structures, and the circumferential length of the turnbuckle gap is greater than the circumferential extension length of the turnbuckle matching connecting part;

the rotating buckle matching gap is arranged between the rotating buckle matching connecting parts in the adjacent rotating buckle matching structures, and the circumferential length of the rotating buckle matching gap is greater than the circumferential extension length of the rotating buckle connecting parts.

Furthermore, along the screwing direction, the thickness of the screwing end of the screwing buckle matched with the connecting part is lower than that of the main body.

Further, the end of screwing in of detaining cooperation connecting portion and main part between be equipped with the changeover portion, the changeover portion include one of cambered surface changeover portion, inclined plane changeover portion or ladder surface changeover portion.

Further, the fluid filter cover is connected with the fluid filter cylinder body through threads, and the intercept of the threads is marked as P;

under the state that the screwing structure and the screwing matching structure are completely staggered, the maximum central angle between the screwing-in end of the adjacent screwing connecting part and the screwing-in end of the screwing matching connecting part is marked as theta;

the thickness of the screwing end of the screwing and matching connecting part is recorded as t', and the thickness of the main body is recorded as t;

the P, the theta, the t' and the t satisfy the relation:

compared with the prior art, the utility model has the following characteristics:

1) compared with a buckle connecting structure, the rotary buckle connecting structure arranged between the fluid filter cover and the filter element has the advantages of simple and reliable structure, convenience and easiness in operation and the like, can effectively avoid the problem that the filter element is not assembled in place or damaged and leaked due to relative rotation of the filter element caused by the sliding of the buckle in the buckle connecting structure, and ensures that the friction force generated when the filter element is matched with a fluid filter cylinder body is small in the assembling and disassembling process and the lower sealing element is not easy to damage, so that the assembly effectiveness of the filter element is ensured;

2) according to the utility model, after the filter element is assembled, the screwing structure and the screwing matching structure can form loose matching connection, so that the filter element is convenient to disassemble and assemble;

3) the thickness of the screwing-in end of the screwing-in matching connection part is reduced, so that the assembly resistance between the screwing structure and the screwing-in matching structure is reduced;

4) according to the utility model, by limiting the screw pitch between the fluid filter cover and the fluid filter cylinder, the maximum central angle between the screwing end of the adjacent screwing connecting part and the screwing end of the screwing matching connecting part and the thickness of the screwing end and the main body of the screwing matching connecting part are set in a completely staggered state, so that when the fluid filter cover is screwed off from the fluid filter cylinder, the connecting effect of the fluid filter cover and the filter element is improved, the resistance of a lower sealing element can be overcome, and the possibility of loosening or early separating the filter element is reduced.

Drawings

FIG. 1 is a schematic view of a fluid filter with a filter element attaching and detaching structure according to example 1;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

FIG. 3 is a schematic view of an assembled fluid filter cover and filter cartridge;

FIG. 4 is a schematic view of the assembly structure of the plate-shaped connection type screw structure and the plate-shaped connection type screw structure in the cross-sectional direction B-B of FIG. 3;

FIG. 5 is a schematic view of an assembly structure of a groove-shaped connection type turn buckle structure and a plate-shaped connection type turn buckle matching structure;

FIG. 6 is a schematic view of an assembly structure of the hemispherical spinner structure and the hemispherical spinner mating structure;

FIGS. 7, 9, 11, and 13 are schematic views illustrating the assembly of a fluid filter cover and a filter cartridge;

FIG. 8 is a cross-sectional view taken along line C-C of FIG. 7;

FIG. 10 is a cross-sectional view taken along line D-D of FIG. 9;

FIG. 12 is a cross-sectional view taken along line E-E of FIG. 11;

FIG. 14 is a cross-sectional view F-F of FIG. 13;

FIGS. 15, 17 and 19 are schematic views illustrating the removal of the fluid filter cover from the filter cartridge;

FIG. 16 is a sectional view taken along line G-G of FIG. 15;

FIG. 18 is a sectional view taken along line H-H in FIG. 17;

FIG. 20 is a sectional view taken along line I-I of FIG. 19;

FIG. 21 is a schematic view of a snap-fit structure;

FIG. 22 is a schematic view of a dimension marking structure of a plate-shaped connection type screw structure and a screw fitting structure;

FIG. 23 is a schematic structural view of a complete staggered state of a turnbuckle structure and a turnbuckle matching structure;

the notation in the figure is:

1-fluid filter cover, 2-filter element, 3-fluid filter cylinder, 4-upper sealing element, 5-lower sealing element, 6-turn buckle structure, 601-turn buckle extending part, 602-turn buckle connecting part, 7-turn buckle matching structure, 701-turn buckle matching extending part and 702-turn buckle matching connecting part.

Detailed Description

The utility model is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.

Example 1:

as shown in fig. 1, the fluid filter with the filter element dismounting structure includes a fluid filter cover 1 and a fluid filter cylinder 3 which are connected by screw threads and mutually surround to form a filter cavity, a filter element 2 arranged in the filter cavity, an upper sealing member 4 arranged between the fluid filter cover 1 and the fluid filter cylinder 3, and a lower sealing member 5 arranged between the bottom end of the filter element 2 and the fluid filter cylinder 3.

As shown in fig. 2-4, 3 screwing structures 6 are arranged on the bottom side of the fluid filter cover 1 at intervals along the circumferential direction, 3 screwing matching structures 7 adapted to the screwing structures 6 are arranged on the top side of the filter element 2 at intervals, the screwing structures 6 include screwing extension portions 601 arranged on the bottom side of the fluid filter cover 1, and screwing connection portions 602 arranged at the bottom ends of the screwing extension portions 601 and extending inward in the radial direction; the screwing and matching structure 7 comprises a screwing and matching extension part 701 arranged on the top side of the filter element 2 and a screwing and matching connection part 702 arranged at the top end of the screwing and matching extension part 701 and extending outwards along the radial direction; the fluid filter cover 1 and the filter element 2 are detachably connected through a separable and contactable turn-buckle connection portion 602 and a turn-buckle matching connection portion 702.

A turnbuckle gap is arranged between the turnbuckle connecting parts 602 in the adjacent turnbuckle structures 6, and the circumferential length of the turnbuckle gap is greater than the circumferential extension length of the turnbuckle matching connecting part 702; a turnbuckle fit clearance is provided between the turnbuckle fit connection portions 702 in the adjacent turnbuckle fit structures 7, and the circumferential length of the turnbuckle fit clearance is greater than the circumferential extension length of the turnbuckle connection portion 602.

Specifically, the fastening connection portion 602 and the fastening engagement connection portion 702 are plate-shaped connection portions and plate-shaped connection engagement portions that extend in the circumferential direction and can be overlapped with each other as shown in fig. 4. In other embodiments, the following schemes may also be selected: firstly, as shown in fig. 5, the screwing connection portion 602 is a groove-shaped connection portion extending in the circumferential direction, and the screwing engagement connection portion 702 is a plate-shaped connection engagement portion that can be fitted into the groove-shaped connection portion; secondly, as shown in fig. 6, the fastening connection portion 602 and the fastening mating connection portion 702 are a hemispherical connection portion and a hemispherical connection mating portion, which have hemispherical end sections, extend along the circumferential direction, and can be overlapped with each other.

During assembly, as shown in fig. 7-8, the outer side surface of the screw-fit connection portion 702 of the filter element 2 is first tightly attached to the outer side surface of the screw-fit connection portion 602 of the fluid filter cover 1, and is rotated while applying an axial pressure directed to the fluid filter cover 1 to the filter element 2; as shown in fig. 9-10, when the screwing-fit connection portion 702 of the filter element 2 is completely staggered from the screwing-fit connection portion 602 of the fluid filter cover 1, the circumferential spacing of the screwing-fit connection portion 602 is greater than the circumferential extension length of the screwing-fit connection portion 702, so that the screwing-fit connection portion 702 is inserted into the gap of the screwing-fit connection portion 602 under the axial pressure, and at this time, the upper edge of the screwing-fit connection portion 602 is located below the lower edge of the screwing end of the screwing-fit connection portion 702 as shown in fig. 11-12; then, the filter element 2 is rotated again, the turnbuckle connection part 602 and the turnbuckle matching connection part 702 are mutually clamped and matched into a turnbuckle overlapping state, and the fluid filter cover 1 and the filter element 2 form a whole body, as shown in fig. 13-14; then, the fluid filter cover 1 is screwed into the fluid filter cylinder 3 along the screw thread while keeping the screwing and overlapping state, and the filter element 2 is pressed into the fluid filter cylinder 3 by the lower surface of the screwing and connecting part 602 along with the screwing of the fluid filter cover 1; when the fluid filter cover 1 is completely screwed down, the filter insert 2 is simultaneously fitted in place and forms a sealing connection with the interior of the fluid filter cartridge 3 via the lower sealing element 5.

When the fluid filter cover 1 is disassembled, as shown in fig. 15-16, the fluid filter cover 1 is screwed upwards along the screw threads, and after the inner side surface of the screwing connecting part 602 is attached to the inner side surface of the screwing matching connecting part 702, the filter element 2 is taken out simultaneously along with the unscrewing of the fluid filter cover 1; when the threads of the fluid filter cover 1 and the fluid filter cylinder 3 are completely disengaged, the fluid filter cover 1 and the filter element 2 can be directly pulled out together; then, the inner surface of the screwing and matching connection part 702 on the filter element 2 is tightly attached to the inner surface of the screwing and matching connection part 602 on the fluid filter cover 1, the filter element 2 is rotated and simultaneously exerts reverse axial tension on the filter element 2, and when the screwing and matching connection part 702 on the filter element 2 is completely staggered with the screwing and matching connection part 602 on the fluid filter cover 1, as shown in fig. 17-18, the filter element 2 can be pulled out from the fluid filter cover 1, as shown in fig. 19-20.

Further, when the fluid filter cover 1 is completely unscrewed from the fluid filter cylinder 3 and the turn-on connection portion 602 and the turn-on engagement connection portion 702 are in a completely misaligned state during the removal process, if the fluid filter cover 1 is vertically removed upward at this time, the fluid filter cover 1 and the filter element 2 may be separated from each other in advance. However, since the filter element 2 is pulled out of the fluid filter cylinder 3 by the screwing connection of the screwing connection portion 602 and the screwing matching connection portion 702 during the unscrewing process of the fluid filter cover 1, the internal sealing structure thereof is removed. The filter insert 2 can now be easily pulled out of the fluid filter cartridge 3.

Example 2:

in this embodiment, in order to improve the convenience of assembly between the filter element 2 and the fluid filter cover 1 and realize loose fitting between the turnbuckle structure 6 and the turnbuckle matching structure 7, as shown in fig. 22, the axial extension height H of the turnbuckle extension 601 in this embodiment is greater than the main body axial thickness t of the turnbuckle matching connection portion 702; the axial thickness T of the body of the turnbuckle connection portion 602 is smaller than the axial extension height h of the turnbuckle mating extension portion 701; as shown in fig. 21, the thickness of the screwing end of the screwing-in fitting connecting portion 702 is smaller than that of the main body along the screwing direction, and an inclined transition section is further provided between the screwing end and the main body, so that the screwing-in connecting portion 602 is embedded under the screwing-in fitting connecting portion 702. In other embodiments, the transition section between the screw-in end and the main body can also be a cambered surface transition section or a stepped surface transition section.

In addition, in order to avoid the problem that the screwing structure 6 and the screwing structure 7 are disengaged in a screwing state while loose fitting is achieved, the thread intercept P between the fluid filter cover 1 and the fluid filter cylinder 3 is that, in a state where the screwing structure 6 and the screwing structure 7 are completely staggered, the maximum central angle θ between the screwing end on the adjacent screwing connecting portion 602 and the screwing end of the screwing matching connecting portion 702 is (as shown in fig. 23), the screwing end thickness t' of the screwing matching connecting portion 702 (as shown in fig. 21), and the main body thickness t need to satisfy the relationship:

if P takes 3mm, t takes 2mm, t' takes 1mm, theta takes pi/10, the scheme can be realized.

The rest is the same as example 1.

The embodiments described above are intended to facilitate the understanding and use of the utility model by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.

Claims (10)

1. The utility model provides a take fluid filter of filter core dismouting structure, encloses fluid filter lid (1) and fluid filter barrel (3) that form filter cavity including each other to and locate filter core (2) in the filter cavity, its characterized in that, the bottom side of fluid filter lid (1) on along circumference interval laid 2 at least and detain structure (6) soon, filter core (2) top side interval laid with detain structure (6) looks adaptation soon detain cooperation structure (7), fluid filter lid (1) and filter core (2) between can dismantle with detaining cooperation structure (7) soon through detaining structure (6) and being connected soon.

2. The fluid filter with a filter element dismounting structure according to claim 1, wherein the turn-buckle structure (6) comprises a turn-buckle extension part (601) arranged at the bottom side of the fluid filter cover (1), and a turn-buckle connection part (602) arranged at the bottom end of the turn-buckle extension part (601) and extending inwards in the radial direction;

the rotary buckle matching structure (7) comprises a rotary buckle matching extension part (701) arranged on the top side of the filter element (2) and a rotary buckle matching connection part (702) arranged at the top end of the rotary buckle matching extension part (701) and extending outwards along the radial direction;

the fluid filter cover (1) and the filter element (2) are detachably connected through a rotary buckle connecting part (602) and a rotary buckle matching connecting part (702) which can be in separable contact.

3. The fluid filter with the filter element dismounting structure according to claim 2, wherein the screw-on connecting portion (602) and the screw-on mating connecting portion (702) are a plate-shaped connecting portion and a plate-shaped connecting mating portion which extend along the circumferential direction and can be overlapped with each other.

4. A fluid filter with a filter element attaching and detaching structure according to claim 2, wherein said screw-on connecting portion (602) is a groove-like connecting portion extending in a circumferential direction, and said screw-on fitting connecting portion (702) is a plate-like fitting portion capable of fitting into the groove-like connecting portion.

5. The fluid filter with the filter element dismounting structure according to claim 2, wherein the turning buckle connection part (602) and the turning buckle matching connection part (702) are a hemispherical connection part and a hemispherical matching connection part which have hemispherical end sections, extend along the circumferential direction and can be mutually overlapped.

6. A fluid filter with a filter element attaching and detaching structure as claimed in claim 2, wherein said turnbuckle extension portion (601) has an axial extension height larger than an axial thickness of the turnbuckle fitting connecting portion (702); the axial thickness of the screwing connecting part (602) is smaller than the axial extension height of the screwing matching extension part (701).

7. The fluid filter with the filter element dismounting structure according to claim 2, wherein a turn-buckle gap is arranged between the turn-buckle connecting parts (602) in the adjacent turn-buckle structures (6), and the circumferential length of the turn-buckle gap is larger than the circumferential extension length of the turn-buckle matching connecting part (702);

a screwing fit clearance is arranged between screwing fit connecting parts (702) in adjacent screwing fit structures (7), and the circumferential length of the screwing fit clearance is greater than the circumferential extension length of the screwing connecting parts (602).

8. The fluid filter with a filter element attaching and detaching structure as set forth in claim 7, wherein a thickness of a screwing end of said screw fitting connection portion (702) in a screwing direction is lower than a thickness of the body.

9. The fluid filter with the filter element dismounting structure according to claim 8, wherein a transition section is arranged between the screwing end of the screwing-fitting connecting portion (702) and the main body, and the transition section comprises one of an arc transition section, a slope transition section or a step transition section.

10. The fluid filter with the filter element dismounting structure according to claim 9, wherein the fluid filter cover (1) is connected with the fluid filter cylinder (3) through screw threads, and the thread intercept is represented as P;

under the state that the screwing structure (6) and the screwing matching structure (7) are completely staggered, the maximum central angle between the screwing end on the adjacent screwing connecting part (602) and the screwing end of the screwing matching connecting part (702) is marked as theta;

the thickness of the screwing end of the screwing and matching connecting part (702) is recorded as t', and the thickness of the main body is recorded as t;

the P, the theta, the t' and the t satisfy the relation:

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