Simple and reliable filter element oil drain valve structure

Abstract

The utility model relates to the technical field, in particular to a simple and reliable filter element oil drain valve structure which comprises an installation portion used for connecting a filter element seat and a filter seat, a valve hole for containing a valve body is formed in the installation portion, the valve body comprises a valve rod, a screw plug with a hole is arranged on the outer side of the upper end of the valve rod in a sleeved mode, and the screw plug with the hole is connected with the valve hole in a matched and screwed mode. A sealing piece is arranged on the outer side of the lower end of the valve rod; a spring is arranged between the lower end of the valve rod and the lower end of the valve hole; the oil drainage valve is simple in structure, small in needed space and quite reliable in performance, when the oil drainage valve is normally used, the valve rod is pressed downwards through the filter element, the interior of the whole valve hole is sealed through abutting of the O-shaped ring and the sealing cavity, engine oil is prevented from leaking out, and when oil drainage is needed, oil drainage is achieved through rotation of the filter cylinder. The acting force of the end face of the internal filter element assembly on the valve rod is canceled, the valve rod rebounds under the action of the spring, and engine oil is discharged through the flow guide groove and the backflow channel to achieve oil drainage.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts, and specifically relates to a simple and reliable filter element oil drain valve structure. Background Technique

[0002] In order to meet the gasoline engine development plan of the 2.0T+ project of the customer company, the applicant assisted in the development of the GD190 module. The module integration includes: an oil filter housing, an oil cooler, a generator mounting bracket, a generator adjusting arm, an internal water channel, an oil channel, a one-way check valve, a bypass valve, an oil drain valve, etc.

[0003] As a part of the GD190 module, when the filter element needs to be replaced, the oil in the filter cartridge is discharged through the oil drain valve and the oil drain channel. During normal operation, it is necessary to ensure that the oil drain channel does not leak. If leakage occurs, a large amount of oil will directly flow back to the oil pan, reducing the oil flow rate into the engine main oil channel, resulting in a decrease in the oil pressure in the engine main oil channel. The engine components cannot be fully lubricated, and it is impossible to detect in time, and even engine cylinder pulling and bearing seizure may occur, and there is a risk of engine scrapping.

[0004] Therefore, a simple and reliable filter element oil drain valve structure is needed to improve the above problems. Content of the Utility Model

[0005] The purpose of the utility model is to provide a simple and reliable filter element oil drain valve structure to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] A simple and reliable filter element oil drain valve structure includes an installation part for connecting a filter element seat and an oil filter housing. A valve hole for accommodating a valve body is opened inside the installation part. The valve body includes a valve rod. A perforated plug is sleeved outside the upper end of the valve rod. The perforated plug is rotatably connected with the valve hole in a matching manner. A sealing member is arranged outside the lower end of the valve rod. A spring is arranged between the lower end of the valve rod and the lower end of the valve hole. The upper end of the valve hole is communicated with the inside of the filter element seat, and a diversion groove structure communicated with the upper end of the valve hole is arranged at the bottom end inside the filter element seat.

[0008] As a preferred scheme of the utility model, the sealing member includes a sealing part fixedly connected to the outside of the valve rod. An annular groove is opened in the middle of the outside of the sealing part. An O-ring is arranged inside the annular groove. The O-ring is in abutting connection with the valve hole to achieve sealing.

[0009] As a preferred scheme of the utility model, the valve hole includes an installation cavity communicated with the inside of the filter element seat, and a sealing cavity is arranged at the lower end of the installation cavity. A spring hole is arranged at the lower end of the sealing cavity.

[0010] As a preferred embodiment of the present utility model, a chamfer is provided at the connection between the lower end of the installation cavity and the upper end of the sealing cavity.

[0011] As a preferred embodiment of the present utility model, an oil return hole is provided on the oil filter seat, and an oil passage is provided between the lower end of the oil return hole and the spring hole.

[0012] As a preferred embodiment of the present utility model, the flow guiding groove structure includes a flow guiding groove opened at the inner bottom end of the filter element seat, and a return passage is opened at one end of the flow guiding groove.

[0013] As a preferred embodiment of the present utility model, the bottom end of the return passage is inclined, and its depth gradually increases from the flow guiding groove to the installation cavity.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] The structure of the present utility model is simple, requires little space, and has very reliable performance. During normal use, the valve stem is pressed down by the filter element, and the O-ring abuts against the sealing cavity to achieve the sealing of the overall valve hole, avoiding the leakage of engine oil. When draining oil is required, by rotating the filter cartridge, the acting force of the inner end face of the filter element on the valve stem is cancelled, and the valve stem rebounds under the action of the spring, and the engine oil is discharged through the flow guiding groove and the return passage to achieve oil drainage. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is the installation schematic diagram of the present utility model;

[0017] Figure 2 is the three-dimensional schematic diagram of the present utility model;

[0018] Figure 3 is the installation sectional schematic diagram of the present utility model;

[0019] Figure 4 is the internal structure schematic diagram of the filter element seat in the present utility model;

[0020] Figure 5 is the present utility model Figure 3 the enlarged view of part A;

[0021] Figure 6 is the schematic diagram of the valve body in the present utility model when in the oil drainage state.

[0022] In the figure: oil filter seat 1, filter element seat 2, installation part 3, filter cartridge 4, oil return hole 5, perforated plug 6, valve stem 7, O-ring 8, sealing part 9, spring 10, flow guiding groove 11, return passage 12, installation cavity 13, spring hole 14. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] Next, in combination with the embodiments of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present utility model.

[0024] To facilitate the understanding of the present utility model, the present utility model will be described more comprehensively below with reference to the relevant. Several embodiments of the present utility model are given. However, the present utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present utility model more thorough and comprehensive.

[0025] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present utility model belongs. The terms used herein in the description of the present utility model are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0027] Please refer to Figures 1-6 , the present utility model provides a technical solution:

[0028] For the embodiment, please refer to Figure 1 , 2 3, 4, and 5, a simple and reliable filter element oil drain valve structure, including an installation part 3 for connecting a filter element seat 2 and an engine oil filter seat 1. A valve hole for accommodating a valve body is provided inside the installation part 3. The valve body includes a valve stem 7. A perforated plug 6 is sleeved outside the upper end of the valve stem 7. The perforated plug 6 is rotationally connected with the valve hole in a matching manner. A sealing member is provided outside the lower end of the valve stem 7. A spring 10 is provided between the lower end of the valve stem 7 and the lower end of the valve hole. The upper end of the valve hole is communicated with the inside of the filter element seat 2. A diversion groove structure communicated with the upper end of the valve hole is provided at the inner bottom end of the filter element seat 2.

[0029] The function of the valve stem 7 is to transmit elastic force and provide support. When designing, PA66 GF30 (glass fiber reinforced) high molecular plastic material is used. The structure of the valve stem 7 is simple and the injection molding processability is very good, which can effectively meet the design life requirement of 300,000 kilometers for the engine supporting the GD190 module. The seal is fixed on the valve stem 7 and moves up and down in the valve hole. Radial sealing of the seal is adopted to form sealing and opening.

[0030] The function of the perforated plug 6 is to be threadedly connected to the upper end thread of the valve hole through external threads. The middle hole of the perforated plug 6 plays a role in radially positioning the valve stem 7, ensuring that the valve stem 7 does not tilt axially when moving up and down. The valve hole and the valve stem 7 have a small clearance fit, and the valve stem 7 can slide up and down freely. At the same time, it can prevent the valve stem 7 from falling off the valve hole due to the elastic force of the spring 10. The opening groove facilitates tightening during assembly, and the riveting point prevents loosening after tightening.

[0031] Please refer to Figure 2 , the seal includes a sealing portion 9 fixedly connected to the outer side of the valve stem 7. A ring groove is provided in the middle of the outer side of the sealing portion 9, and an O-ring 8 is arranged inside the ring groove. The O-ring 8 is in fit and abutment with the valve hole to achieve sealing. The O-ring 8 is designed with hydrogenated nitrile rubber, which can be used at -40°C to 150°C and has very good cold and heat resistance and aging resistance.

[0032] Please refer to Figure 5 and 6 , the valve hole includes an installation cavity 13 internally communicating with the filter element seat 2, and a sealing cavity is provided at the lower end of the installation cavity 13. A spring hole 14 is provided at the lower end of the sealing cavity. An inclined chamfer is provided at the connection between the lower end of the installation cavity 13 and the upper end of the sealing cavity. An oil return hole 5 is provided on the engine oil filter seat 1, and an oil passage is provided between the lower end of the oil return hole 5 and the lower end of the spring hole 14.

[0033] When tightening the filter cartridge 4 after replacing the filter element, in order to ensure that the valve stem 7 can be smoothly pressed into the spring hole 14 again after lifting, when designing the valve stem 7, it is effectively ensured that when the valve stem is lifted, the lower end of the valve stem 7 is still inside the spring hole 14, and the lower end of the valve stem 7 adopts a rounded corner for guiding, effectively ensuring a reliable guiding effect when the valve stem 7 is pressed down again after lifting, and effectively preventing the valve stem 7 from being deformed or broken when pressing against the step of the valve hole during the pressing down process.

[0034] Please refer to Figure 4 , the diversion groove structure includes a diversion groove 11 provided at the bottom end inside the filter element seat 2, and a return channel 12 is provided at one end of the diversion groove 11. The bottom end of the return channel 12 is inclined, and its depth gradually increases from the diversion groove 11 to the position of the installation cavity 13.

[0035] The function of the diversion groove 11 is to, when the oil drain valve is opened, guide as much oil as possible at the bottom of the filter element cavity into the valve hole and flow into the oil pan, and at the same time, it can also provide a return channel 12 for the oil to flow back from the side of the valve.

[0036] During normal operation: The filter cartridge 4 is tightened, and the filter element fits and seals with the end face of the filter element cavity of the base. The filter element presses down the valve stem 7, and the valve stem 7 compresses the spring 10. The O-ring 8 on the valve stem 7 is pressed into the installation cavity 13 below the diversion groove 11, closing the valve hole. There is a stepped hole limit under the end face of the sealing part 7 on the valve stem 7. At this time, the oil drain valve hole is in a closed state;

[0037] When replacing the filter element, the filter cartridge 4 is loosened, driving the upper movement of the end face of the filter element. The valve stem 7 pressed by the filter element rises under the action of the spring 10. When the seal (the sealing ring in the sealing groove) on the valve stem 7 rises above the diversion groove 11, the diversion groove 11, the return channel 12 and the valve hole in the filter element cavity are connected. The engine oil flows to the oil drain valve hole through the diversion groove 11 and the return channel 12 and then flows to the oil pan. At this time, the oil drain valve hole is in an open state for draining oil;

[0038] To ensure that no negative pressure is generated in the filter element cavity during the oil draining process, a vent hole is designed on the filter cartridge. It is ensured that after the filter cartridge is unscrewed 4 - 5 turns (it takes 10 turns to completely unscrew), the vent hole is exposed to connect to the external atmospheric pressure to ensure that the oil in the cavity flows down smoothly; The valve stem 7 only needs to be lifted 8 mm to be completely above the diversion groove, making it in a connected state.

[0039] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A simple and reliable oil drain valve structure for a filter element, comprising an installation part (3) for connecting a filter element seat (2) and an engine oil filter seat (1), wherein a valve hole for accommodating a valve body is formed inside the installation part (3), and it is characterized in that: The valve body includes a valve stem (7). A perforated plug (6) is sleeved on the outer side of the upper end of the valve stem (7). The perforated plug (6) is rotationally connected with the valve hole in a matching manner. A sealing member is arranged on the outer side of the lower end of the valve stem (7). A spring (10) is arranged between the lower end of the valve stem (7) and the lower end of the valve hole. The upper end of the valve hole is internally communicated with the filter element seat (2). A flow guiding groove structure communicated with the upper end of the valve hole is arranged at the inner bottom end of the filter element seat (2).

2. The simple and reliable filter element oil drain valve structure according to claim 1, characterized in that: The sealing member includes a sealing portion (9) fixedly connected to the outer side of the valve stem (7). A ring groove is formed in the middle of the outer side of the sealing portion (9). An O-ring (8) is arranged inside the ring groove. The O-ring (8) is in abutting connection with the valve hole to achieve sealing.

3. The simple and reliable oil drain valve structure of the filter element according to claim 2, characterized in that: The valve hole includes an installation cavity (13) internally communicated with the filter element seat (2). A sealing cavity is arranged at the lower end of the installation cavity (13). A spring hole (14) is arranged at the lower end of the sealing cavity.

4. The simple and reliable filter element oil drain valve structure according to claim 3, characterized in that: An inclined chamfer is arranged at the connection between the lower end of the installation cavity (13) and the upper end of the sealing cavity.

5. The simple and reliable filter element oil drain valve structure according to claim 3 or 4, characterized in that: An oil return hole (5) is arranged on the engine oil filter seat (1). An oil passage is arranged between the oil return hole (5) and the lower end of the spring hole (14).

6. The simple and reliable filter element oil drain valve structure according to any one of claims 1-4, characterized in that: The flow guiding groove structure includes a flow guiding groove (11) formed at the inner bottom end of the filter element seat (2). A return flow channel (12) is formed at one end of the flow guiding groove (11).

7. The simple and reliable filter element oil drain valve structure according to claim 6, characterized in that: The bottom end of the return flow channel (12) is inclined, and its depth gradually increases from the position of the flow guiding groove (11) to the installation cavity (13).

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