Filter element for hydraulic system

Abstract

The utility model discloses a filter element for a hydraulic system, which comprises a body, the body comprises an end cover, an external connecting ring is fixedly mounted on the outer side of the end cover, connecting rods are fixedly mounted on the outer side of the external connecting ring, two ends of each connecting rod are respectively and fixedly connected with the two external connecting rings, a plurality of connecting rods are arranged in a circumferential array, and a part of the connecting rods are slidably provided with force application rods. The number of the force application rods is at least two, reset springs are arranged between the force application rods and the connecting rod, and the reset springs drive the force application rods to slide. After the force application rod is arranged and the fixed cover plate at the position of the mounting port is detached, the force application rod is reset under the action of the reset spring and pops out of the mounting port, so that the force application rod is conveniently separated from adhesion or pulled out by a tool through torsion, and the filter element is conveniently detached.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydraulic filters, and relates to a filter for a hydraulic system. Background Art

[0002] A filter is a structure for filtering hydraulic oil in a lubrication system. The filtered impurities usually adhere to the filter, and the filter often needs to be replaced.

[0003] Common filters mainly consist of end caps, sealing rings, skeletons and filter media. When installing the filter, the filter is inserted into the filter, and then a spring, a fixed cover plate and other components are sequentially installed above the upper end cap. During long-term use, due to the softening of the sealing ring, the viscosity of the hydraulic oil and other reasons, the filter sometimes adheres to the filter and is not easy to disassemble. Summary of the Utility Model

[0004] In view of the above problems, the utility model provides a filter for a hydraulic system, which well solves the problems in the prior art.

[0005] In order to achieve the above object, the technical scheme adopted by the utility model is as follows:

[0006] A filter for a hydraulic system, comprising:

[0007] A body, the body includes an end cap;

[0008] An external ring, the external ring is fixedly installed on the outside of the end cap;

[0009] A connecting rod, the connecting rod is fixedly installed on the outside of the external ring, both ends of the connecting rod are respectively fixedly connected to two external rings, and a plurality of connecting rods are circumferentially arrayed;

[0010] A force-applying rod, the force-applying rod is slidably installed on the connecting rod, and at least two force-applying rods are provided;

[0011] A return spring, the return spring is arranged between the force-applying rod and the connecting rod, and the return spring drives the force-applying rod to slide.

[0012] Optionally, the external ring is threadedly connected with fastening screws, and a plurality of fastening screws are circumferentially arrayed.

[0013] Optionally, the upper external ring is rotatably connected to the end cap.

[0014] Optionally, anti-twist rods are fixedly connected to both sides of the upper end of the connecting rod on which the force-applying rod is installed, and the lower ends of the anti-twist rods are fixedly connected to the positions of the adjacent connecting rods on the external ring.

[0015] Optionally, an arc-shaped rod is fixedly connected to the upper end of the force-applying rod.

[0016] Optionally, the force - applying rod and the connecting rod are slidably and key - connected.

[0017] Optionally, a plurality of hooks are fixedly connected to the lower end of the outer circumferential ring located on the upper side, and the hooks are hooked to the lower side of the end cover.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] 1. After the force - applying rod is provided, when the fixed cover plate at the installation port position is disassembled, the force - applying rod resets under the action of the return spring, pops out of the installation port, and is convenient to be twisted to break away from adhesion or to be pulled out by using tools, which is convenient for the disassembly of the filter element;

[0020] 2. By setting the fastening screw to connect the end cover and the outer circumferential ring, the outer circumferential ring part is detachable. When replacing the filter element, only the body part needs to be replaced, reducing the replacement cost;

[0021] 3. When the body is adhered, by twisting the force - applying rod, the body is separated from the adhesion, and the upper outer circumferential ring is rotatably connected to the end cover. When twisting, the force - applying rod applies a torsional force to the lower outer circumferential ring, reducing the possibility that the two outer circumferential rings rotate inconsistently and causing the filter material part in the middle to twist, and reducing the influence on the partially reusable filter element. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is the overall structural schematic diagram of an embodiment of the utility model;

[0023] Figure 2 is Figure 1 the enlarged schematic diagram of part A in

[0024] Figure 3 is Figure 1 the enlarged schematic diagram of part B in

[0025] Figure 4 is Figure 1 the enlarged schematic diagram of part C in

[0026] Reference numerals: 1, body; 11, end cover;

[0027] 2, outer circumferential ring; 21, fastening screw; 22, hook;

[0028] 3, connecting rod; 31, anti - torsion rod;

[0029] 4, force - applying rod; 41, return spring; 42, arc - shaped rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0031] Please refer to Figure 1 and Figure 2 , which discloses a filter element for a hydraulic system according to an embodiment of the present utility model, including a body 1. The body 1 includes an end cap 11. An external ring 2 is fixedly installed on the outer side of the end cap 11. A connecting rod 3 is fixedly installed on the outer side of the external ring 2. Both ends of the connecting rod 3 are fixedly connected to two external rings 2 respectively. A plurality of connecting rods 3 are arranged in a circumferential array. A force-applying rod 4 is slidably installed on some of the connecting rods 3. There are at least two force-applying rods 4. A return spring 41 is arranged between the force-applying rod 4 and the connecting rod 3, and the return spring 41 drives the force-applying rod 4 to slide.

[0032] Specifically, the external ring 2 and the connecting rod 3 are fixedly installed on the outer side of the filter element body 1. A slidable force-applying rod 4 is arranged on some of the connecting rods 3. When the filter element is installed, the force-applying rod 4 is pressed down by the fixing cover plate to avoid affecting the installation of the fixing cover plate. When disassembling, the force-applying rod 4 is reset under the action of the return spring 41. By twisting the force-applying rod 4 with a tool, the body 1 is driven to rotate so as to break away from the adhesion.

[0033] It should be understood that after installation, there is a certain distance between the upper end of the filter element and the surface of the installation port, making it difficult to remove the filter element after adhesion. After the force-applying rod 4 is provided, after the fixing cover plate at the installation port position is disassembled, the force-applying rod 4 is reset under the action of the return spring 41 and pops out of the installation port, facilitating its detachment from the adhesion by twisting or pulling out with a tool, which is convenient for the disassembly of the filter element.

[0034] In some feasible ways, the external ring 2 is circular. The external ring 2 is fixedly connected to the end cap 11. Both the connecting rod 3 and the force-applying rod 4 are rod-shaped. There are two force-applying rods 4 arranged symmetrically about the center. The return spring 41 is sleeved on the outer side of the force-applying rod 4. When the installation part on the end cap 11 needs to fit the end cap 11, the return spring 41 can be arranged inside the connecting rod 3 so that the force-applying rod 4 can be completely retracted into the connecting rod 3.

[0035] As a specific implementation manner of a filter element for a hydraulic system provided by the utility model, please refer to Figure 3 , and the external ring 2 is threadedly connected with a fastening screw 21. A plurality of fastening screws 21 are arranged in a circumferential array.

[0036] In general, by providing the fastening screws 21 to connect the end cover 11 and the external ring 2, the external ring 2 is partially detachable. When replacing the filter element, only the body 1 needs to be replaced, thereby reducing the cost of replacement.

[0037] Furthermore, the outer connecting ring 2 located on the upper side is rotatably connected to the end cover 11 .

[0038] It should be understood that when the main body 1 is adhered, the main body 1 is freed from the adhesion by twisting the force-applying rod 4, so that the upper external ring 2 is rotatably connected to the end cover 11. During the twisting, the force-applying rod 4 exerts a torque force on the external ring 2 on the lower side, thereby reducing the possibility of the two external rings 2 rotating inconsistently and causing the middle filter material part to twist, thereby reducing the impact on some of the filter elements that can be reused.

[0039] In some feasible embodiments, the fastening screw 21 is installed on the connecting rod 3 , and the connecting rod 3 is thicker at a certain position, which is conducive to more stable fixing of the fastening screw 21 .

[0040] For further information, see Figure 1 The two sides of the upper end of the connecting rod 3 on which the force applying rod 4 is installed are fixedly connected with anti-twist rods 31, and the lower end of the anti-twist rod 31 is fixedly connected to the position of the adjacent connecting rod 3 on the external ring 2.

[0041] It should be understood that the force rod 4 releases the body 1 from adhesion by twisting, and the anti-twist rods 31 are fixedly connected on both sides of the connecting rod 3 to increase the stability of the connecting rod 3 when twisted by the force rod 4 and improve the service life of the connecting rod 3.

[0042] For further information, see Figure 4 A plurality of hooks 22 are fixedly connected to the lower end of the outer connecting ring 2 located on the upper side, and the hooks 22 are hooked on the lower side of the end cover 11 .

[0043] It should be understood that by providing the hook 22, the hook 22 is hooked on the lower side of the end cover 11, which is convenient for the filter element.

[0044] In some feasible embodiments, the bottom of the hook 22 is an inclined surface. When the body 1 is taken out from the outer ring 2, the lower end cover 11 partially opens the hook 22 through the inclined surface to facilitate the removal of the body 1.

[0045] As another specific implementation of a hydraulic system filter element provided by the utility model, please refer to Figure 1 The upper end of the force application rod 4 is fixedly connected to the arc rod 42.

[0046] It should be understood that by setting the arc rod 42, a fulcrum is provided at the upper end of the force-applying rod 4 to facilitate twisting and pulling out by tools. The arc rod 42 is set to an arc shape so that it fits the outer shape of the external ring 2, reducing the impact on other positions during installation.

[0047] Furthermore, the force application rod 4 and the connecting rod 3 are slidably key-connected.

[0048] It should be understood that by setting the key connection, the possibility of the force application rod 4 rotating is reduced, and further the possibility of the arc rod 42 affecting other positions is reduced.

[0049] In some feasible ways, multiple arc rods 42 are installed in a circumferential array, and the force application rod 4 and the connecting rod 3 can also be selected to be non-circular shapes such as square tubes to prevent the force application rod 4 from rotating.

[0050] Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on 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 within the protection scope of the present utility model.

Claims

1. A filter element for a hydraulic system, characterized in that: include: a body, the body including an end cap; An external connecting ring, the external connecting ring is fixedly mounted on the outside of the end cover; A connecting rod, the connecting rod is fixedly mounted on the outside of the outer connecting ring, the two ends of the connecting rod are respectively fixedly connected to the two outer connecting rings, and there are multiple connecting rods in a circular array; A force application rod, the force application rod being slidably mounted on the connecting rod, and at least two force application rods are provided; A return spring is arranged between the force applying rod and the connecting rod, and the return spring drives the force applying rod to slide.

2. A filter element for a hydraulic system according to claim 1, characterized in that: The outer ring is threadedly connected with a fixing screw, and there are a plurality of fixing screws in a circular array.

3. A filter element for a hydraulic system according to claim 2, characterized in that: The outer connecting ring located on the upper side is rotatably connected to the end cover.

4. A filter element for a hydraulic system according to claim 3, characterized in that: Anti-twist bars are fixedly connected to both sides of the upper end of the connecting rod on which the force-applying rod is installed, and the lower end of the anti-twist bar is fixedly connected to a position adjacent to the connecting rod on the outer ring.

5. The filter element for a hydraulic system according to claim 1, characterized in that: The upper end of the force applying rod is fixedly connected to the arc rod.

6. A filter element for a hydraulic system according to claim 5, characterized in that: The force application rod is slidably key-connected with the connecting rod.

7. A filter element for a hydraulic system according to claim 2, characterized in that: A plurality of hooks are fixedly connected to the lower end of the outer connecting ring located on the upper side, and the hooks are hooked on the lower side of the end cover.

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