Engine oil control valve sleeve with wear-resistant coating

Abstract

The utility model discloses an engine oil control valve sleeve with a wear-resistant coating. The engine oil control valve sleeve comprises a valve sleeve body, a valve element and a filtering assembly. A titanium nitride wear-resistant coating is arranged on the inner wall of the valve sleeve, the filter assembly comprises a filter screen sleeve embedded in the valve sleeve in a sliding mode, threaded parts of the inner walls of the two ends of the filter screen sleeve are connected with a filter screen with filter holes distributed from large to small, a blocking seat is arranged on the inner wall of the valve sleeve and abuts against the filter screen sleeve, and a valve cover is arranged at the input end of the filter screen sleeve and is in sliding fit with a sliding seat on the periphery of the valve sleeve through a positioning sliding rod. A top spring and a stop block are arranged in the positioning sliding rod to form a positioning assembly, and a pressing type unlocking assembly is arranged outside the valve sleeve. The valve cover is fixed through bolts and provided with an oil conveying pipe, and a fluororubber sealing ring is arranged between the filter screen sleeve and the blocking seat. Abrasion resistance of the valve sleeve is improved through the titanium nitride coating, efficient filtering is achieved through the grading filter screen, the modular structure facilitates replacement of the filter screen, the sealing ring and the positioning structure ensure that the vibration environment is stable, and durability, filtering efficiency and maintenance convenience of the engine oil control valve are effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of engine oil control valve technology, and in particular to an oil control valve sleeve with a wear-resistant coating. Background Technology

[0002] In the field of engine oil control valves, existing technologies, such as the solution proposed in patent CN111794822B, achieve structural simplification and convenient assembly through the integrated design of the valve body and valve sleeve. The valve sleeve has a filter screen at its bottom, reinforced with a reinforcing plate, combined with the elastic support structure of the telescopic column and spring, and the cooperation between the screen and the frame, which improves filtration stability and component strength to a certain extent. It is also suitable for simple equipment assembly and meets the needs of industrial production.

[0003] However, the above solutions have obvious shortcomings: First, the filter screen is inconvenient to maintain, as its structure, which is fixed to the bottom of the valve sleeve, requires disassembling the valve body for replacement, making the operation cumbersome; second, the valve sleeve lacks wear resistance, as it does not employ surface treatment technology and is prone to wear due to long-term friction from the valve core and scouring by oil, affecting its service life; third, the filtration function is limited, and the single-layer filter screen or fixed pore size design cannot achieve graded filtration, making it difficult to simultaneously intercept large particles and filter fine impurities, which can easily lead to clogging or incomplete filtration.

[0004] To address the aforementioned issues, this utility model enhances performance through three major innovations: First, a titanium nitride wear-resistant coating is added to the inner wall of the valve sleeve, significantly enhancing its wear and corrosion resistance and extending the lifespan of core components. Second, a modular filter assembly is adopted, with the filter sleeve slidably embedded. Different pore sizes of filter screens are connected by threads at both ends to achieve graded filtration. Combined with a positioning slide rod and a press-type unlocking structure, the filter screen can be quickly replaced without disassembling the valve body, improving maintenance convenience. Third, the sealing and positioning design is optimized. The fluororubber sealing ring and the stop seat cooperate to form a reliable seal. Combined with the smooth surface of the coating and the beveled positioning structure, the stability of the component is ensured under vibration conditions, balancing filtration efficiency and structural reliability. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a valve sleeve for an oil control valve with a wear-resistant coating.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An oil control valve sleeve with a wear-resistant coating includes a valve sleeve, a valve core inside the valve sleeve, and a filter assembly for filtering oil that is slidably embedded inside the valve sleeve. The filter assembly includes a filter screen sleeve that is slidably embedded inside the valve sleeve. Both ends of the filter screen sleeve have threaded portions on their inner walls, and each threaded portion is threaded with a filter screen. The filter screen has different pore sizes, which are distributed from large to small according to the oil flow direction. The inner wall of the valve sleeve also has a stop seat that abuts against the end of the filter screen sleeve. The input end of the filter screen sleeve has a valve cover. The outer circumference of the input end of the filter screen sleeve has a symmetrically arranged positioning slide rod. The outer circumference of the valve sleeve has a symmetrically arranged slide seat. The positioning slide rod is slidably inserted into the slide seat. The positioning slide rod has a positioning component for fixing its position inside. The valve sleeve has an unlocking component for releasing the position of the positioning slide rod outside. The inner wall of the valve sleeve has a titanium nitride coating.

[0008] Preferably, the positioning component includes a stop block that is slidably embedded inside the positioning slide rod, and the end of the stop block is provided with a top spring.

[0009] Preferably, the unlocking component includes a pressing crossbar horizontally disposed on the side wall of the slide block, a pressing vertical bar vertically slidingly abutting the end of the pressing crossbar, a pressing connecting rod at the top of the pressing vertical bar, and sliding sleeves slidably fitted on the outer walls of both the pressing vertical bar and the pressing crossbar, the sliding sleeves being fixed to the side wall of the slide block, and a return spring being provided between the top of the pressing vertical bar and the slide block.

[0010] Furthermore, an oil delivery pipe is provided on the top of the valve cover.

[0011] Furthermore, the valve cover is fixedly connected to the valve sleeve by multiple bolts.

[0012] Preferably, the filter sleeve and the baffle seat have the same sealing ring on their contact surfaces.

[0013] Preferably, the contact surfaces of the extrusion vertical bar and the extrusion horizontal bar are both provided with a 45-degree bevel, and the lower part of the stop block is provided with a 45-degree bevel.

[0014] The beneficial effects of this utility model are as follows:

[0015] 1. This utility model significantly improves wear and corrosion resistance and extends valve sleeve service life by applying a titanium nitride wear-resistant coating to the inner wall of the valve sleeve; it adopts a graded filtration structure with a slidable filter sleeve and filter screens with different pore sizes at both ends, filtering impurities of different particle sizes from large to small according to the oil flow direction, ensuring valve core cleanliness; the automatic locking and positioning structure of the positioning slide rod and stop block, combined with a press-type unlocking component, enables quick installation and tool-free disassembly of the filter component, greatly improving the convenience of filter maintenance; the fluororubber sealing ring abuts against the stop seat to form an elastic seal, combined with the smooth surface of the coating and the bevel positioning design, ensuring that the filter component remains stable and does not shift under vibration. The overall structure has the advantages of wear resistance, high efficiency filtration, convenient maintenance and reliable sealing, effectively improving the working performance and long-term stability of the oil control valve.

[0016] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the oil control valve sleeve with a wear-resistant coating proposed in this utility model.

[0018] Figure 2 This is a schematic diagram of the internal cross-sectional structure of the oil control valve sleeve with a wear-resistant coating proposed in this utility model.

[0019] Figure 3 This is a schematic diagram of the external structure of the filter assembly of the oil control valve sleeve with wear-resistant coating proposed in this utility model.

[0020] Figure 4 This is a schematic diagram of the internal structure of the filter assembly of the oil control valve sleeve with wear-resistant coating proposed in this utility model.

[0021] Figure 5 The oil control valve sleeve with wear-resistant coating proposed in this utility model Figure 3 A magnified structural diagram of a portion of the structure at point A (unlocking component);

[0022] Figure 6 This is a schematic diagram of the positioning assembly structure of the oil control valve sleeve with wear-resistant coating proposed in this utility model.

[0023] In the diagram: 1. Valve sleeve; 2. Valve cover; 3. Valve core; 4. Filter screen sleeve; 5. Stop seat; 6. Sealing ring; 7. Filter screen; 8. Threaded part; 9. Positioning slide rod; 10. Slide seat; 11. Top spring; 12. Stop block; 13. Extrusion crossbar; 14. Extrusion vertical bar; 15. Slide sleeve; 16. Return spring; 17. Oil supply pipe; 18. Pressing connecting rod. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0025] Example 1, referring to Figures 1 to 6The oil control valve sleeve with a wear-resistant coating has a main body of valve sleeve 1, which contains a valve core 3 for controlling the flow of oil. A filter assembly is slidably embedded inside valve sleeve 1. This filter assembly includes a filter screen sleeve 4, with threaded portions 8 on the inner walls at both ends. Filter screens 7 are threaded onto the threaded portions 8, and the pore sizes of the filter screens 7 are distributed from large to small according to the oil flow direction to achieve graded filtration of the oil. A stop 5 is provided on the inner wall of valve sleeve 1. When the filter screen sleeve 4 is installed in place, the stop 5 abuts against the end of the filter screen sleeve 4, serving a positioning function. A valve cover 2 is provided at the input end of the filter screen sleeve 4, and an oil inlet pipe 17 is provided on the top of the valve cover 2 for oil input. The valve cover 2 is fixedly connected to valve sleeve 1 by multiple bolts to ensure a stable connection. Simultaneously, a sealing ring 6 is provided on the contact surface between the filter screen sleeve 4 and the stop 5. The sealing ring is made of fluororubber elastic material, which can effectively prevent oil leakage. The inner wall of valve sleeve 1 has a titanium nitride coating.

[0026] Positioning components

[0027] The filter sleeve 4 has a symmetrically arranged positioning slide rod 9 on the outer periphery of its input end, and a symmetrically arranged slide seat 10 on the outer periphery of its valve sleeve 1. The positioning slide rod 9 is slidably inserted into the slide seat 10. The positioning assembly includes a stop block 12 slidably embedded in the positioning slide rod 9, and a top spring 11 is provided at the end of the stop block 12. The lower part of the stop block 12 has a 45-degree bevel, and the notch structure of the slide seat 10 cooperates with the bevel of the stop block 12 to achieve the positioning function.

[0028] Unlock Components

[0029] The valve sleeve 1 is externally equipped with an unlocking assembly for releasing the position of the positioning slide rod 9. The unlocking assembly includes a horizontally mounted compression bar 13 on the side wall of the slide block 10, with a vertically sliding compression bar 14 at its end. The top of the compression bar 14 is equipped with a pressing connecting rod 18. Sliding sleeves 15 are slidably fitted onto the outer walls of both the compression bar 14 and the compression bar 13. These sleeves 15 are fixed to the side wall of the slide block 10 and serve a guiding function. A return spring 16 is provided between the top of the compression bar 14 and the slide block 10 to reset the components after the unlocking operation. The contact surfaces of the compression bar 14 and the compression bar 13 are both beveled at a 45-degree angle, allowing force transmission through the bevel's engagement.

[0030] Working principle:

[0031] Filter component installation

[0032] When installing the filter assembly, first insert the positioning slide rod 9 into the notch of the slide block 10. During insertion, the 45-degree bevel of the stop block 12 abuts against the notch of the slide block 10. Due to the guiding effect of the bevel, the stop block 12 is compressed, overcoming the elastic force of the top spring 11, and automatically enters the interior of the positioning slide rod 9. At this time, the positioning slide rod 9 continues to slide until the stop block 12 separates from the notch of the slide block 10. When the stop block 12 reaches the appropriate position inside the slide block 10, the top spring 11 releases its elastic force, pushing the stop block 12 to reset and pop out. The side wall of the stop block 12 abuts against the side wall of the slide block 10, thereby fixing the positioning slide rod 9 and realizing the installation and fixation of the filter assembly. At the same time, since the sealing ring 6 is made of fluororubber elastic material, after the filter assembly is fixed in position, the elastic rebound force of the fluororubber ensures that the filter assembly will not be misaligned even when subjected to vibration, thus ensuring its stability.

[0033] Filter screen removal and installation

[0034] When it is necessary to disassemble or install the filter screen 7, since the filter screen 7 is threadedly connected to the filter screen sleeve 4 through the threaded part 8, the disassembly and installation operations can be easily completed by simply rotating the filter screen 7 along the threaded part 8. This is convenient, quick, and facilitates the cleaning or replacement of the filter screen.

[0035] Complete disassembly of the filter assembly

[0036] When the filter assembly needs to be disassembled as a whole, press the pressing rod 18. The pressing rod 18 drives the vertical squeezing rod 14 to slide vertically. Since the contact surface between the vertical squeezing rod 14 and the horizontal squeezing rod 13 is a 45-degree bevel, when the vertical squeezing rod 14 slides downward, it applies horizontal pressure to the end of the horizontal squeezing rod 13 through the bevel, causing the horizontal squeezing rod 13 to slide laterally under the guidance of the sliding sleeve 15. During the sliding process of the horizontal squeezing rod 13, the bevel at its end contacts the bevel at the lower part of the stop block 12, squeezing the stop block 12, causing the stop block 12 to overcome the elastic force of the top spring 11 and fully enter the positioning slide rod 9. At this time, the positioning between the positioning slide rod 9 and the slide seat 10 is released, and the filter assembly can be removed as a whole. After releasing the pressing rod 18, the vertical squeezing rod 14 and the horizontal squeezing rod 13 return to their original positions under the action of the return spring 16, preparing for the next operation.

[0037] Oil filtration

[0038] Oil enters through the oil supply pipe 17 at the top of the valve cover 2. It first passes through the filter screen 7 at the inlet end of the filter sleeve 4. This filter screen has a relatively large pore size, which can filter out larger impurities. Then, the oil continues to flow to the filter screen 7 at the other end of the filter sleeve 4, which has a smaller pore size, further filtering out smaller impurities. This achieves graded filtration according to the oil flow direction, from large to small pores, ensuring the cleanliness of the oil entering the valve core 3 and improving the working performance and service life of the oil control valve.

[0039] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An oil control valve sleeve with a wear-resistant coating, comprising a valve sleeve (1), characterized in that, The valve sleeve (1) is provided with a valve core (3) inside. A filter assembly for filtering oil is slidably embedded inside the valve sleeve (1). The filter assembly includes a filter screen sleeve (4) slidably embedded inside the valve sleeve (1). Threaded portions (8) are provided on the inner walls of both ends of the filter screen sleeve (4). Filter screens (7) are threadedly connected to the threaded portions (8). The filter screens (7) have different pore sizes and are installed in descending order according to the oil flow direction. A baffle (5) is also provided on the inner wall of the valve sleeve (1). The baffle (5) is connected to the filter screen. The ends of the sleeve (4) abut against each other. The input end of the filter sleeve (4) is provided with a valve cover (2). The outer periphery of the input end of the filter sleeve (4) is symmetrically provided with a positioning slide rod (9). The outer periphery of the valve sleeve (1) is symmetrically provided with a slide seat (10). The positioning slide rod (9) is slidably inserted into the slide seat (10). The positioning slide rod (9) is provided with a positioning component for fixing the position. The valve sleeve (1) is provided with an unlocking component for releasing the position of the positioning slide rod (9). The inner wall of the valve sleeve (1) is coated with titanium nitride.

2. The oil control valve sleeve with a wear-resistant coating according to claim 1, characterized in that, The positioning component includes a stop block (12) that is slidably embedded inside the positioning slide rod (9), and the end of the stop block (12) is provided with a top spring (11).

3. The oil control valve sleeve with a wear-resistant coating according to claim 2, characterized in that, The unlocking assembly includes a pressing crossbar (13) horizontally disposed on the side wall of the slide (10), the end of the pressing crossbar (13) vertically sliding against a pressing vertical bar (14), the top of the pressing vertical bar (14) is provided with the same pressing connecting rod (18), the outer walls of the pressing vertical bar (14) and the pressing crossbar (13) are slidably fitted with sliding sleeves (15), the sliding sleeves (15) are fixed to the side wall of the slide (10), and a return spring (16) is provided between the top of the pressing vertical bar (14) and the slide (10).

4. The oil control valve sleeve with a wear-resistant coating according to claim 1, characterized in that, The valve cover (2) is provided with an oil delivery pipe (17) on top.

5. The oil control valve sleeve with a wear-resistant coating according to claim 1, characterized in that, The valve cover (2) is fixedly connected to the valve sleeve (1) by multiple bolts.

6. The oil control valve sleeve with a wear-resistant coating according to claim 5, characterized in that, The filter sleeve (4) and the baffle (5) have the same sealing ring (6) on their contact surfaces.

7. The oil control valve sleeve with a wear-resistant coating according to claim 3, characterized in that, The contact surfaces of the extrusion vertical rod (14) and the extrusion horizontal rod (13) are both provided with a 45-degree bevel, and the lower part of the stop block (12) is provided with a 45-degree bevel.

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