Hydraulic oil cylinder with filtering structure

Abstract

The utility model relates to a hydraulic oil cylinder with a filtering structure. The hydraulic oil cylinder is provided with an oil cylinder body. An oil inlet pipeline communicated with the interior is fixedly arranged on the side wall of the oil cylinder body, and a filtering assembly is arranged at a pipeline opening of the oil inlet pipeline. The filtering assembly comprises a filtering body, an upper channel and a lower channel, a filtering through groove is formed in the middle of the filtering body in a penetrating mode, the upper end of the upper channel is fixedly connected with an oil outlet of an external hydraulic oil station, the lower end of the upper channel is fixedly arranged at the upper end of the filtering through groove, and the upper end of the lower channel is fixedly arranged at the lower end of the filtering through groove. The lower end of the lower channel is fixedly connected with a pipeline opening of the oil inlet pipeline; a plurality of placing grooves which are arranged close to the filtering through groove and extend in the extending direction of the filtering through groove are formed in the filtering main body, a magnetic attraction body used for adsorbing chippings in the hydraulic oil is arranged in each placing groove, and a filtering layer used for filtering the hydraulic oil is arranged in the filtering through groove; according to the utility model, hydraulic oil during pressurization can be cleaned, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to a hydraulic oil cylinder with a filtering structure. Background Art

[0002] The hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy and performs linear reciprocating motion (or swinging motion). It has a simple structure and reliable operation. When it is used to achieve reciprocating motion, the deceleration device can be eliminated, and there is no transmission gap, and the motion is smooth, so it is widely used in the hydraulic systems of various machines. The output force of the hydraulic cylinder is proportional to the effective area of ​​the piston and the pressure difference on both sides; the hydraulic cylinder is basically composed of a cylinder barrel and a cylinder head, a piston and a piston rod, a sealing device, a buffer device and an exhaust device. The buffer device and the exhaust device depend on the specific application, and other devices are indispensable.

[0003] When the hydraulic cylinder is in use, hydraulic oil needs to be transported into the inside, and the piston is pushed to move by the hydraulic oil. The hydraulic oil will be reused continuously. After repeated use, many impurities will be mixed inside it. When the hydraulic oil and oil impurities are located inside the hydraulic cylinder, it is easy to form accumulation, producing a large amount of sludge impurities, which will affect the service life of the hydraulic cylinder. Utility Model Content

[0004] The utility model aims to provide a hydraulic oil cylinder with a filtering structure, which can clean the hydraulic oil during pressurization and prolong the service life.

[0005] The technical solution for achieving the purpose of the utility model is as follows: the utility model comprises a cylinder body; an oil inlet pipe connected to the interior is fixedly provided on the side wall of the cylinder body, and a filter assembly for connecting to an external hydraulic oil station is provided at the pipe opening of the oil inlet pipe; the filter assembly comprises a filter body, an upper channel and a lower channel, a filter groove is penetrated through the middle of the filter body, the upper end of the upper channel is fixedly connected to the oil outlet of the external hydraulic oil station, the lower end of the upper channel is fixedly arranged at the upper end of the filter groove, the upper end of the lower channel is fixedly arranged at the lower end of the filter groove, and the lower end of the lower channel is fixedly connected to the pipe opening of the oil inlet pipe; the filter body is provided with a plurality of placement grooves arranged close to the filter groove and extending along the extension direction of the filter groove, each placement groove is provided with a magnetic body for adsorbing debris in the hydraulic oil, and a filter layer for filtering the hydraulic oil is provided inside the filter groove.

[0006] Further, a guiding block for guiding the hydraulic oil towards the inner wall of the filtering through - slot is fixedly arranged inside the filtering through - slot. A first guiding inclined surface for guiding the hydraulic oil towards the inner wall of the filtering through - slot is arranged at the upper end of the guiding block. A second guiding inclined surface for guiding the filtered hydraulic oil to the lower channel is arranged at one end of the inner part of the filtering through - slot close to the lower channel. A third guiding inclined surface capable of forming a guiding channel with the second guiding inclined surface is arranged at the lower end of the guiding block; the filtering layer is located in the middle of the guiding block.

[0007] Further, a clamping groove is arranged inside the filtering through - slot. An extension rod is fixedly arranged on the filtering layer. A clamping block capable of forming a plug - in fit with the clamping groove is arranged on the extension rod. The filtering layer is detachably fixed on the inner wall of the filtering through - slot through the clamping connection between the clamping block and the clamping groove. The inner side of the filtering layer presses against the middle of the guiding block, and the outer side of the filtering layer presses against the inner wall of the filtering through - slot.

[0008] Further, a connection cover is arranged on the upper channel. A through - hole capable of forming a connection with the oil pipe of an external hydraulic oil station is arranged on the connection cover; internal positive threads are arranged inside the connection cover, and reverse threads capable of forming a thread fit with the positive threads are arranged on the outer wall of the upper end of the upper channel. The connection cover is detachably fixed on the upper channel through the thread fit of the positive threads and the reverse threads; a limiting rod capable of extending into the upper channel after the connection cover is fixed on the upper channel is fixedly arranged on the connection cover. The extension rod can be located between the filtering through - slot and the limiting rod after the connection cover is fixed on the upper channel.

[0009] Further, a first connection block and a second connection block are symmetrically and fixedly arranged on the guiding block. The first connection block and the second connection block are respectively fixedly connected with the inner wall of the filtering through - slot. The guiding block is fixed inside the filtering through - slot through the fixed connection between the first connection block and the second connection block and the inner wall of the filtering through - slot; the first connection block and the second connection block are located below the filtering layer.

[0010] Further, a plurality of guiding strips are fixedly arranged on the side wall of the guiding block, and each guiding strip is arranged along the extending direction of the filtering through - slot.

[0011] The utility model has positive effects: (1) A plurality of placing grooves are arranged on the filtering main body of the utility model, which are arranged close to the filtering through - slot and extend along the extending direction of the filtering through - slot. A magnetic body for adsorbing debris in the hydraulic oil is arranged in each placing groove. A filtering layer for filtering the hydraulic oil is arranged inside the filtering through - slot; the magnetic body can magnetically adsorb iron filings in the hydraulic oil, and the filtering layer filters out impurities in the hydraulic oil, so that the impurities in the hydraulic oil entering the oil cylinder are reduced, the accumulation of sludge is reduced, and the service life is prolonged.

[0012] (2) Inside the filtering through - slot of the utility model, a guiding block is fixedly arranged. At the upper end of the guiding block, there is a first guiding inclined surface for guiding hydraulic oil towards the inner wall of the filtering through - slot; under the guidance of the first guiding inclined surface, the hydraulic oil can flow towards the inner wall of the filtering through - slot, reducing the flow space, increasing the residual amount of iron filings removed by the magnetic attractor in the hydraulic oil, and enhancing the filtering effect.

[0013] (3) Inside the filtering through - slot of the utility model, a clamping groove is provided. On the filtering layer, an extension rod is fixedly arranged. On the extension rod, there is a clamping block that can form a plug - in fit with the clamping groove. The filtering layer is detachably and fixedly arranged on the inner wall of the filtering through - slot through the clamping connection between the clamping block and the clamping groove; through the clamping connection between the clamping block and the clamping groove, the filtering layer in the filtering through - slot can be taken out and replaced, ensuring the filtering quality.

[0014] (4) The extension rod of the utility model can be located between the filtering through - slot and the limiting rod after the connecting cover is fixedly arranged on the upper channel; it can ensure that when the hydraulic oil flows in, it will not impact the extension rod, reducing the risk of the clamping block disengaging from the clamping connection with the clamping groove.

[0015] (5) The middle part of the guiding block is extruded by the inner side of the filtering layer of the utility model, and the inner wall of the filtering through - slot is extruded by the outer side of the filtering layer. During the process of taking out the filtering layer, the filtering layer takes out the iron filings adsorbed on the inner wall of the filtering through - slot, keeping the inner wall of the filtering through - slot clean.

[0016] (6) On the side wall of the guiding block of the utility model, a plurality of guiding strips are fixedly arranged. Each guiding strip is arranged along the extending direction of the filtering through - slot. The guiding strips can guide the hydraulic oil to flow evenly in the middle of the guiding block, making the filtering effect better. Description of the Drawings

[0017] In order to make the content of the utility model easier to be clearly understood, the following further details the utility model according to specific embodiments and in conjunction with the drawings, where

[0018] Figure 1 is the overall structural schematic diagram of the utility model;

[0019] Figure 2 is Figure 1 the partial enlarged view of A in

[0020] Figure 3 is the side cross - sectional view of the filtering component of the utility model;

[0021] Figure 4 is the top cross - sectional view of the filtering component of the utility model;

[0022] Figure 5 is Figure 3 the partial enlarged view of B in Detailed Embodiment

[0023] See Figures 1 to 5 , the utility model has an oil cylinder body 1; an oil inlet pipe 11 communicating with the inside is fixedly arranged on the side wall of the oil cylinder body 1, and a filtering assembly 2 for connecting an external hydraulic oil station is arranged at the pipe orifice of the oil inlet pipe 11; the filtering assembly 2 includes a filtering main body 21, an upper channel 22 and a lower channel 23. A filtering through groove 24 is arranged through the middle of the filtering main body 21. The upper end of the upper channel 22 is fixedly connected with the oil outlet of the external hydraulic oil station, the lower end of the upper channel 22 is fixedly arranged at the upper end of the filtering through groove 24, the upper end of the lower channel 23 is fixedly arranged at the lower end of the filtering through groove 24, and the lower end of the lower channel 23 is fixedly connected with the pipe orifice of the oil inlet pipe 11; a plurality of placing grooves 211 are arranged on the filtering main body 21 close to the filtering through groove 24 and extending along the extending direction of the filtering through groove 24, and a magnetic body 3 for adsorbing debris in the hydraulic oil is arranged in each placing groove 211. A filtering layer 4 for filtering the hydraulic oil is arranged inside the filtering through groove 24; the magnetic body 3 can magnetically adsorb iron filings in the hydraulic oil, and the filtering layer 4 filters out impurities in the hydraulic oil, so that the impurities in the hydraulic oil entering the oil cylinder are reduced, the sludge accumulation is reduced, and the service life is prolonged.

[0024] In the filtering layer 4, quartz sand, activated carbon filter material or coarse fiber filter material can be adopted, etc.

[0025] A guiding block 5 for guiding the hydraulic oil towards the inner wall of the filtering through groove 24 is fixedly arranged inside the filtering through groove 24. A first guiding inclined surface 51 for guiding the hydraulic oil towards the inner wall of the filtering through groove 24 is arranged at the upper end of the guiding block 5. A second guiding inclined surface 241 for guiding the filtered hydraulic oil to the lower channel 23 is arranged at one end of the filtering through groove 24 close to the lower channel 23. A third guiding inclined surface 52 capable of forming a guiding channel with the second guiding inclined surface 241 is arranged at the lower end of the guiding block 5; the filtering layer 4 is located in the middle of the guiding block 5; the hydraulic oil can flow towards the inner wall of the filtering through groove 24 under the guidance of the first guiding inclined surface 51, so that the flowing space is reduced, the residual amount of iron filings removed by the magnetic body 3 in the hydraulic oil is increased, and the filtering effect is enhanced.

[0026] A clamping groove is arranged inside the filtering through groove 24. An extension rod 41 is fixedly arranged on the filtering layer 4. A clamping block 411 capable of forming a plug-in fit with the clamping groove is arranged on the extension rod 41. The filtering layer 4 is detachably and fixedly arranged on the inner wall of the filtering through groove 24 through the clamping fit of the clamping block 411 and the clamping groove. The inner side of the filtering layer 4 presses the middle of the guiding block 5, and the outer side of the filtering layer 4 presses the inner wall of the filtering through groove 24; through the clamping fit of the clamping block 411 and the clamping groove, the filtering layer 4 in the filtering through groove 24 can be taken out and replaced to ensure the filtering quality.

[0027] A connection cover 6 is provided on the upper channel 22. A through hole is provided on the connection cover 6, which can form a connection with the oil pipe of an external hydraulic oil station. A positive thread is provided inside the connection cover 6, and an anti-thread that can form a thread fit with the positive thread is provided on the outer wall of the upper end of the upper channel 22. The connection cover 6 is detachably fixed on the upper channel 22 through the thread fit of the positive thread and the anti-thread. A limiting rod 61 that can extend into the upper channel 22 after the connection cover 6 is fixed on the upper channel 22 is fixedly provided on the connection cover 6. The extension rod 41 can be located between the filter through slot 24 and the limiting rod 61 after the connection cover 6 is fixed on the upper channel 22, which can prevent the hydraulic oil from impacting the extension rod 41 when flowing in and reduce the risk of the clamping block 411 disengaging from the clamping fit with the clamping slot.

[0028] The lower end of the lower channel 23 can also be fixedly connected to the oil inlet pipe 11 through threads, which is convenient for removing the entire filter assembly 2.

[0029] First connection blocks 5-1 and second connection blocks 5-2 are symmetrically and fixedly provided on the guiding block 5. The first connection blocks 5-1 and the second connection blocks 5-2 are respectively fixedly connected to the inner wall of the filter through slot 24. The guiding block 5 is fixed inside the filter through slot 24 through the fixed connection of the first connection blocks 5-1 and the second connection blocks 5-2 to the inner wall of the filter through slot 24. The first connection blocks 5-1 and the second connection blocks 5-2 are located below the filter layer 4.

[0030] A plurality of guiding strips 53 are fixedly provided on the side wall of the guiding block 5, and each guiding strip 53 is arranged along the extending direction of the filter through slot 24.

[0031] The working principle of the present utility model: The filter layer 4 is fixed inside the filter through slot 24 through the cooperation of the clamping block 411 and the clamping slot. After the connection cover 6 is fixed on the upper channel 22, the limiting rod 61 on the connection cover 6 restricts the extension rod 41 inside the filter through slot 24. The hydraulic oil enters the upper channel 22 from the through hole at the upper end of the connection cover 6, and after being adsorbed by the magnetic body 3 and filtered by the filter layer 4, the hydraulic oil flows into the hydraulic cylinder through the lower channel 23.

[0032] In the above specific embodiments, the purpose, technical solution and beneficial effects of the present utility model are further described in detail. It should be understood that the above are only specific embodiments of the present utility model and are not used to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A hydraulic cylinder with a filtering structure, comprising a cylinder body (1); characterized in that: An oil inlet pipe (11) communicating with the inside is fixedly provided on the side wall of the oil cylinder body (1), and a filter assembly (2) for connecting to an external hydraulic oil station is provided at the pipe opening of the oil inlet pipe (11); the filter assembly (2) comprises a filter body (21), an upper channel (22) and a lower channel (23); a filter groove (24) is provided through the middle of the filter body (21); the upper end of the upper channel (22) is fixedly connected to the oil outlet of the external hydraulic oil station, and the lower end of the upper channel (22) is fixedly arranged on the upper portion of the filter groove (24). The filter body (21) is provided with a plurality of placement grooves (211) arranged close to the filter groove (24) and extending along the extension direction of the filter groove (24), each placement groove (211) is provided with a magnetic body (3) for absorbing debris in the hydraulic oil, and the filter groove (24) is provided with a filter layer (4) for filtering the hydraulic oil.

2. The hydraulic cylinder with a filtering structure according to claim 1, characterized in that: A guide block (5) for guiding the hydraulic oil toward the inner wall of the filter groove (24) is fixedly provided inside the filter groove (24); a first guide slope (51) for guiding the hydraulic oil toward the inner wall of the filter groove (24) is provided at the upper end of the guide block (5); a second guide slope (241) for guiding the filtered hydraulic oil to the lower channel (23) is provided at one end of the filter groove (24) near the lower channel (23); a third guide slope (52) for forming a guide channel with the second guide slope (241) is provided at the lower end of the guide block (5); and the filter layer (4) is located in the middle of the guide block (5).

3. The hydraulic cylinder with a filtering structure according to claim 2, characterized in that: The filter groove (24) is provided with a card slot inside, an extension rod (41) is fixedly provided on the filter layer (4), and a card block (411) is provided on the extension rod (41) that can be plugged into the card slot. The filter layer (4) is detachably fixed on the inner wall of the filter groove (24) through the card block (411) and the card slot. The inner side of the filter layer (4) presses the middle part of the guide block (5), and the outer side of the filter layer (4) presses the inner wall of the filter groove (24).

4. The hydraulic cylinder with a filtering structure according to claim 3, characterized in that: The upper channel (22) is provided with a connection cover (6), and the connection cover (6) is provided with a through hole that can be connected to an oil pipe of an external hydraulic oil station; the connection cover (6) is provided with a positive thread inside, and the upper end outer wall of the upper channel (22) is provided with a reverse thread that can form a thread match with the positive thread, and the connection cover (6) is detachably fixed to the upper channel (22) through the thread match of the positive thread and the reverse thread; the connection cover (6) is fixedly provided with a limit rod (61) that can extend into the interior of the upper channel (22) after the connection cover (6) is fixedly provided on the upper channel (22), and the extension rod (41) can be located between the filter groove (24) and the limit rod (61) after the connection cover (6) is fixedly provided on the upper channel (22).

5. The hydraulic cylinder with a filtering structure according to claim 2, characterized in that: A first connecting block (5-1) and a second connecting block (5-2) are symmetrically fixedly arranged on the guide block (5); the first connecting block (5-1) and the second connecting block (5-2) are respectively fixedly connected to the inner wall of the filter groove (24); the guide block (5) is fixed inside the filter groove (24) by the fixed connection between the first connecting block (5-1) and the second connecting block (5-2) and the inner wall of the filter groove (24); the first connecting block (5-1) and the second connecting block (5-2) are located below the filter layer (4).

6. The hydraulic cylinder with a filtering structure according to claim 2, characterized in that: A plurality of guide bars (53) are fixedly provided on the side wall of the guide block (5), and each guide bar (53) is arranged along the extension direction of the filter slot (24).

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