Magnetic filtering structure for removing metal scrap iron

Abstract

The invention discloses a magnetic filtering structure for removing metal scrap iron, an outer sleeve body and an inner sleeve body are each of a structure with one open end and one closed end, the open end of the outer sleeve body is fixed to an end cover, the inner sleeve body is inserted into the outer sleeve body, the open end extends out of the outer sleeve body, a mandrel of a filter element is inserted into the inner sleeve body, a plurality of permanent magnets are fixed on the mandrel at intervals, and the permanent magnets are fixed to the outer sleeve body. The outer side of the filter element seals the open end of the inner sleeve body, slotted holes are formed in the outer wall of the outer sleeve body and the outer wall of the inner sleeve body, the filter element is rotated to drive the inner sleeve body to rotate synchronously, the slotted holes in the inner sleeve body are communicated with the slotted holes in the outer sleeve body, lubricating oil enters the inner sleeve body through the slotted holes, and metal impurities capable of being magnetically attracted in the lubricating oil are attracted by the permanent magnet. Metal impurities are magnetically attracted through the magnet, the filter element can be pulled out, cleaning and replacement of the filter element are facilitated, before the filter element is pulled out, lubricating oil filled in the inner sleeve body is extruded and discharged into the gearbox, brought-out of the lubricating oil is greatly reduced, and use is more convenient and faster.

Description

Technical Field

[0001] The present invention relates to a magnetic filtering structure for removing metallic iron filings. Background Art

[0002] When metallic impurities such as iron filings are mixed into the lubricating oil in a gearbox, it will affect the lubrication effect and may also damage the gears. The existing method is to regularly replace the lubricating oil. However, after replacing the lubricating oil, there are still some iron filings attached to the inner wall surface of the gearbox. After adding new lubricating oil, it will still affect the lubrication again. Summary of the Invention

[0003] The present invention provides a magnetic filtering structure for removing metallic iron filings to solve the problems existing in the above-mentioned prior art.

[0004] The technical solution adopted by the present invention is as follows: A magnetic filtering structure for removing metallic iron filings, comprising an outer housing, an inner housing, an end cap, and a filter element having a permanent magnet and a core shaft. Both the outer housing and the inner housing are structures with one end open and one end closed. The open end of the outer housing is fixed to the end cap. The inner housing is inserted into the outer housing, and its open end extends outside the outer housing. The core shaft of the filter element is inserted into the inner housing. A plurality of permanent magnets are fixedly spaced on the core shaft. The outer side of the filter element closes the open end of the inner housing. Slot holes are provided on the outer walls of both the outer housing and the inner housing. The filter element is rotated to drive the inner housing to rotate synchronously, so that the slot holes on the inner housing communicate with the slot holes on the outer housing. The lubricating oil enters the inner housing through the slot holes, and the magnetizable metallic impurities in the lubricating oil are adsorbed by the permanent magnets.

[0005] Further, a sealing cover is fixedly provided at one end of the core shaft near the open end. The sealing cover is placed outside the inner housing and closes the open end of the inner housing.

[0006] Further, a boss portion is provided on the inner hole wall of the end cap. Flange surfaces are provided at the open ends of both the outer housing and the inner housing. The flange surface of the outer housing and the flange surface of the inner housing are placed on both sides of the boss portion, and the flange surface of the outer housing is fixed to the boss portion.

[0007] Further, the filter element further includes a first piston, a second piston, a spring, and a push rod. A first piston and a plurality of second pistons are sleeved on the core shaft at intervals. The first piston is placed outside the second piston and near the open end of the inner housing. Both the first piston and the second piston are in contact with the inner wall surface of the inner housing. A plurality of springs are sleeved on the core shaft. One end of each spring abuts against the corresponding permanent magnet, and the other end abuts against the corresponding first piston and second piston. The push rod axially penetrates the first piston and the second piston along the core shaft. The inner end of the push rod abuts against the second piston at the end, and the outer end extends outside the inner housing. A plurality of through holes are provided axially on the second piston.

[0008] Furthermore, the push rod is provided with a plurality of steps arranged at intervals, the first piston and the second piston are both provided with step holes, and the spring abuts against the corresponding first piston and second piston, so that the step surface of the step hole abuts against the step.

[0009] Furthermore, liquid outlet holes are provided on the closed surfaces of the outer casing and the inner casing.

[0010] Furthermore, the first piston, the second piston and the permanent magnet are all provided with a step hole having a large hole portion and a small hole portion, and both ends of the spring abut against the corresponding step holes.

[0011] Furthermore, the apertures of the large hole portions of the step holes in the first piston and the second piston are both larger than the apertures of the permanent magnets.

[0012] Furthermore, a threaded portion is provided on the inner end surface of the end cover.

[0013] The present invention has the following beneficial effects: The present invention uses a magnet to magnetically attract metal impurities, and the filter element can be pulled out, which is convenient for cleaning and replacing the filter element. Before pulling out the filter element, the lubricating oil filled in the inner sleeve is squeezed and discharged into the gear box, which greatly reduces the lubricating oil being carried out, and is more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a structural diagram of the present invention.

[0015] Figure 2 It is a cross-sectional view of the present invention.

[0016] Figure 3 It is an exploded view of the present invention.

[0017] Figure 4 This is a structural diagram of the filter element. DETAILED DESCRIPTION

[0018] The present invention will be further described below in conjunction with the accompanying drawings.

[0019] like Figures 1 to 4 The present invention discloses a magnetic filtering structure for removing metal iron filings, comprising an outer sleeve 1, an inner sleeve 2, an end cover 3, and a filter element 4 having a permanent magnet 41 and a core shaft 42. The outer sleeve 1 and the inner sleeve 2 are both structures with one end open and the other end closed, the open end of the outer sleeve 1 is fixed to the end cover 3, the inner sleeve 2 is inserted into the outer sleeve 1, and the open end of the inner sleeve 2 extends outside the outer sleeve 1.

[0020] The core shaft 42 of the filter element 4 is inserted into the inner sleeve 2, and a plurality of permanent magnets 41 are fixed on the core shaft 42 at intervals. One end of the filter element 4 extends out of the inner sleeve 2 and closes the open end of the inner sleeve 2. Slots 10 are provided on the outer walls of the outer sleeve 1 and the inner sleeve 2. The filter element 4 is rotated and the inner sleeve is driven to rotate synchronously. When the slots on the inner sleeve 2 and the slots on the outer sleeve are connected, the lubricating oil enters the inner sleeve 2 through the slots, and the metal impurities in the lubricating oil that can be magnetically attracted are adsorbed by the permanent magnets 41.

[0021] A threaded portion 32 is provided on the inner end surface of the end cover 3. When in use, the threaded portion 32 of the end cover 3 is threadedly connected with a hole reserved on the gear box, the outer sleeve 1 and the end cover 3 are fixed together and remain stationary, and the inner sleeve 2 can be rotated in the axial direction by external force.

[0022] In order to ensure that the lubricating oil flows out from the opening of the outer sleeve 1 and the inner sleeve 2, the opening of the outer sleeve 1 and the inner sleeve 2 needs to be well sealed. A boss portion 31 is provided on the inner hole wall of the end cover 3, and flange surfaces are provided at the opening ends of the outer sleeve 1 and the inner sleeve 2. The flange surface of the outer sleeve 1 and the flange surface of the inner sleeve 2 are placed on both sides of the boss portion, and the flange surface of the outer sleeve 1 is fixed to the boss portion of the end cover 3 by bolts, and a sealing ring is provided between the two to ensure sealing.

[0023] A sealing cover 43 is fixed on the core shaft 42, and the sealing cover 43 is fixed to the flange surface of the inner sleeve body 2 by bolts, and a sealing ring is arranged between the two to ensure sealing. In order to facilitate the rotation of the filter element 4, a rotating handle is arranged on the outer end surface of the sealing cover 43.

[0024] When in use, the end cover 3 is fixed to the gear box, the outer sleeve 1 and the inner sleeve 2 are extended into the gear box, and the filter element 4 is rotated first so that the slots 10 on the inner sleeve 2 and the slots 10 on the outer sleeve 1 are staggered with each other, and the lubricating oil in the gear box cannot enter the inner sleeve 2 (during assembly, the outer wall surface of the inner sleeve 2 and the inner wall surface of the outer sleeve 1 are in contact to ensure the sealing effect of the joint). When the two slots 10 are connected to each other, the lubricating oil enters the inner sleeve 2, and the metal impurities (mainly iron filings) in the lubricating oil that can be magnetically attracted are adsorbed by the permanent magnet 41, thereby removing the iron filings from the lubricating oil.

[0025] After using for a period of time, when the filter element needs to be cleaned, the filter element 4 is rotated to stagger the two slots 10. At this time, the inner and outer shells are closed to form a closed cavity, and the end cover 3 is loosened and pulled out as a whole.

[0026] After the inner and outer housings are closed to form a closed cavity, lubricating oil will remain in the inner cavity of the inner housing 2. If this lubricating oil is not drained, when the filter element is withdrawn as a whole, the lubricating oil will be carried out together, which will greatly reduce the amount of lubricating oil in the gearbox. At this time, it is necessary to pour out the lubricating oil in the filter element outside and then pour it into the gearbox, and the process is rather cumbersome. Therefore, the present invention provides a "plunger extrusion" structure to extrude the lubricating oil in the filter element and then pull out the filter element as a whole. The specific structure of the "plunger extrusion" is as follows.

[0027] The filter element 4 includes a first piston 44, a second piston 45, a spring 46 and a push rod 47. A first piston 44 and several second pistons 45 are sleeved on the core shaft 42 at intervals, and the first piston 44 is placed outside the second piston 45 and close to the open end of the inner housing 2. Both the first piston and the second piston are in contact with the inner wall surface of the inner housing 2, and several through holes are provided axially on the second piston 45.

[0028] Several springs 46 are sleeved on the core shaft 42. One end of each spring 46 abuts against the corresponding side permanent magnet 41, and the other end abuts against the corresponding side first piston 44 or second piston 45. The push rod 47 axially penetrates the first piston 44 and the second piston 45 along the core shaft 42, and the inner end of the push rod 47 abuts against the second piston 45 at the end, and the outer end extends out of the inner housing 2.

[0029] Since both the first piston 44 and the second piston 45 are in a floating state (i.e., subject to the spring force in the axial direction), in order to realize the axial limit of the first piston 44 and the second piston 45, several steps 471 are arranged at intervals on the push rod 47, and step holes are provided on both the first piston 44 and the second piston 45. The spring 46 abuts against the corresponding first piston 44 and second piston 45, so that the step surfaces of the step holes on the first piston 44 and the second piston 45 abut against each step 471 at the corresponding position on the push rod 47.

[0030] To realize the axial positioning of the push rod 47, a limit platform 472 is also provided on the push rod 47. Under the action of the spring force, the first piston 44 and the second piston 45 react on the push rod 47, so that the limit platform 472 abuts against the inner end surface of the sealing cover 43.

[0031] After the inner and outer housings are closed to form a closed cavity, when it is necessary to drain the lubricating oil in the inner housing 2, the push rod 47 is axially pushed. The push rod drives the first piston 44 and the second piston 45 to move. The lubricating oil between the first piston 44 and the second piston 45, and between adjacent second pistons 45 is extruded and flows through the through holes on the second piston 45. Liquid discharge holes 11 are provided on the closed surfaces of the outer housing 1 and the inner housing 2. Finally, the lubricating oil flows back into the gearbox through the liquid discharge holes 11.

[0032] The first piston 44, the second piston 45, and the permanent magnet 41 are all provided with stepped holes having large hole portions and small hole portions, and both ends of the spring 46 abut against the corresponding stepped holes. The arrangement of the stepped holes can better position the spring.

[0033] The diameters of the large hole portions of the stepped holes in the first piston 44 and the second piston 45 are both larger than the diameter of the permanent magnet 41. When the first piston 44 and the second piston 45 move axially, contact with the outer wall surface of the permanent magnet 41 can be avoided, so that iron filings adsorbed on the outer wall surface of the permanent magnet 41 can be prevented from being scraped.

[0034] After the lubricating oil is extruded, the discharge filter element can be cleaned of iron filings, which can prevent a large amount of lubricating oil from remaining in the inner sleeve body and make its use more convenient.

[0035] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, several improvements can be made without departing from the principle of the present invention, and these improvements should also be regarded as the protection scope of the present invention.

Claims

1. A magnetic filtering structure for removing metal scraps, characterized in that: The invention comprises an outer sleeve (1), an inner sleeve (2), an end cover (3), and a filter element (4) having a permanent magnet (41) and a core shaft (42). The outer sleeve (1) and the inner sleeve (2) are both structures with one end open and the other end closed. The open end of the outer sleeve (1) is fixed to the end cover (3). The inner sleeve (2) is inserted into the outer sleeve (1) and the open end extends outside the outer sleeve. The core shaft (42) of the filter element (4) is inserted into the inner sleeve (2). If The dry permanent magnets (41) are fixed on the core shaft (42) at intervals, the outer side of the filter element (4) closes the open end of the inner sleeve (2), and slots (10) are provided on the outer walls of the outer sleeve (1) and the inner sleeve (2). The filter element (4) is rotated to drive the inner sleeve to rotate synchronously, so that the slots on the inner sleeve are connected with the slots on the outer sleeve, and lubricating oil enters the inner sleeve through the slots, and the metal impurities in the lubricating oil that can be attracted by magnetism are adsorbed by the permanent magnet (41).

2. The magnetic filtering structure for removing metal scraps as claimed in claim 1, characterized in that: A sealing cover (43) is fixed to one end of the core shaft (42) close to the open end. The sealing cover (43) is placed outside the inner sleeve body (2) and seals the open end of the inner sleeve body.

3. The magnetic filtering structure for removing metal scraps as claimed in claim 1, characterized in that: A boss portion (31) is provided on the inner hole wall of the end cover (3), and flange surfaces are provided at the opening ends of the outer sleeve (1) and the inner sleeve (2), the flange surface of the outer sleeve (1) and the flange surface of the inner sleeve (2) are placed on both sides of the boss portion, and the flange surface of the outer sleeve (1) is fixed to the boss portion.

4. The magnetic filtering structure for removing metal scraps as claimed in claim 1, characterized in that: The filter element (4) further comprises a first piston (44), a second piston (45), a spring (46) and a push rod (47). A first piston (44) and a plurality of second pistons (45) are sleeved on the core shaft (42) at intervals, and the first piston (44) is placed outside the second piston (45) and close to the opening end of the inner sleeve (2), and the first piston and the second piston are both in contact with the inner wall surface of the inner sleeve (2); A plurality of springs (46) are sleeved on the core shaft (42), one end of each spring (46) abuts against the permanent magnet (41) on the corresponding side, and the other end abuts against the first piston (44) and the second piston (45) on the corresponding side. A push rod (47) is provided along the axial direction of the core shaft (42) to penetrate the first piston (44) and the second piston (45), and the inner end of the push rod (47) abuts against the second piston (45) at the end, and the outer end extends out of the inner sleeve (2), and a plurality of through holes are provided in the axial direction of the second piston (45).

5. The magnetic filtering structure for removing metal scraps as claimed in claim 4, characterized in that: The push rod (47) is provided with a plurality of steps (471) arranged at intervals, and the first piston (44) and the second piston (45) are both provided with step holes, and the spring (46) abuts against the corresponding first piston (44) and second piston (45), so that the step surface of the step hole abuts against the step (471).

6. The magnetic filtering structure for removing metal scraps as claimed in claim 4, characterized in that: Liquid outlet holes (11) are provided on the closed surfaces of the outer casing (1) and the inner casing (2).

7. The magnetic filtering structure for removing metal scraps as claimed in claim 4, characterized in that: The first piston (44), the second piston (45) and the permanent magnet (41) are all provided with a stepped hole having a large hole portion and a small hole portion, and both ends of the spring (46) are abutted in the corresponding stepped holes.

8. The magnetic filtering structure for removing metal scraps as claimed in claim 7, characterized in that: The diameters of the large hole portions of the step holes in the first piston (44) and the second piston (45) are both larger than the diameter of the permanent magnet (41).

9. The magnetic filtering structure for removing metal scraps as claimed in claim 1, characterized in that: A threaded portion (32) is provided on the inner end surface of the end cover (3).

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