Novel pressure-adjustable oil filler cap

Abstract

The utility model discloses a novel pressure-adjustable oil filler cap, which comprises a main body unit, the main body unit comprises an oil filler cap, the lower side surface of the oil filler cap is provided with a sealing groove and a spring groove, and the inner wall surface of the sealing groove is fixedly connected with a gasket. When air pressure in the diesel engine reaches a critical point, gas can push the pressure regulating diaphragm to move upwards in the fixed pipe and enable the pressure regulating diaphragm to move to an area on the upper side of the air inlet, so that the gas enters the air inlet to flow towards the air groove and then enters the pressure relief groove, and then the gas can push the sealing cover to move downwards. The sealing cover slides out of the pressure relief groove, then gas is exhausted outwards, the exhausted part of gas can reduce the internal air pressure of the diesel engine, internal parts of the diesel engine are protected, and the service life of the diesel engine is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of diesel engines, in particular to a novel adjustable pressure fuel filler cap. Background Art

[0002] A diesel engine is an internal combustion engine that mainly burns diesel as fuel. Due to its high energy density and efficiency, it has been widely used in many fields. The technology of diesel engines has developed well in China, not only occupying an important position in traditional industries, but also showing great progress and potential in the fields of new energy and environmental protection.

[0003] When a diesel engine is used in a low-temperature environment in winter, the rubber hose at the engine outlet freezes, causing blockage and increasing the crankcase pressure, which will result in engine oil leakage and damage to components such as the turbocharger, and ultimately lead to the damage of the entire engine. Considering the actual application situation, the function of the fuel filler cap is to seal the oil filling port and protect the oil tank. Therefore, a novel adjustable pressure fuel filler cap is designed to avoid the increase in crankcase pressure caused by the blockage of the engine outlet. Summary of the Utility Model

[0004] The purpose of this part is to outline some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this part, as well as in the abstract and title of the application, to avoid obscuring the purpose of this part, the abstract, and the title. However, such simplifications or omissions shall not be used to limit the scope of the utility model.

[0005] In view of the problems existing in the above-mentioned existing novel adjustable pressure fuel filler cap, the present utility model is proposed.

[0006] Therefore, the purpose of the present utility model is to provide a novel adjustable pressure fuel filler cap, which solves the problem that "when a diesel engine is used in a low-temperature environment in winter, the rubber hose at the engine outlet freezes, causing blockage and increasing the crankcase pressure, which will result in engine oil leakage and damage to components such as the turbocharger, and ultimately lead to the damage of the entire engine. Considering the actual application situation, the function of the fuel filler cap is to seal the oil filling port and protect the oil tank. Therefore, a novel adjustable pressure fuel filler cap is designed to avoid the increase in crankcase pressure caused by the blockage of the engine outlet."

[0007] To solve the above technical problems, the present utility model provides the following technical solutions:

[0008] A novel adjustable pressure fuel filler cap, comprising:

[0009] A main body unit, including a fuel filler cap, wherein a sealing groove and a spring groove are formed on the lower surface of the fuel filler cap, and a gasket is fixedly connected to the inner wall surface of the sealing groove;

[0010] The pressure regulating unit includes a fixed pipe fixedly connected to the top of the inner wall of the spring groove. The lower end of the fixed pipe is detachably connected to a screw rod. A fixed cover is fixedly connected to the lower side surface of the screw rod. A pressure regulating diaphragm is slidably connected to the outside of the fixed pipe. A pressure regulating spring is fixedly connected to the upper side surface of the pressure regulating diaphragm, and the upper end of the pressure regulating spring is fixedly connected to the top of the inner wall of the spring groove. The outer side surface of the pressure regulating diaphragm is slidably connected to the inner wall surface of the spring groove. An air inlet is provided on one inner wall of the fixed pipe. An air groove is provided inside the fuel filler cap, and one end of the air groove is communicated with the fixed pipe. A pressure relief groove is provided on the lower side surface of the fuel filler cap, and the top of the inner wall of the pressure relief groove is communicated with the other end of the air groove. An exhaust assembly is provided inside the pressure relief groove.

[0011] As a preferred embodiment of the novel adjustable pressure fuel filler cap of the present invention, wherein: the exhaust assembly includes a bracket fixedly connected to the inner wall surface of the pressure relief groove. A sliding rod is slidably connected inside the bracket, and a sealing cover is fixedly connected to the lower end of the sliding rod. The outer side surface of the sealing cover is movably connected to the inner wall surface of the pressure relief groove.

[0012] As a preferred embodiment of the novel adjustable pressure fuel filler cap of the present invention, wherein: a fixing plate is fixedly connected to the upper end of the sliding rod, and a return spring is fixedly connected to the lower side surface of the fixing plate, and the lower end of the return spring is fixedly connected to the bracket.

[0013] As a preferred embodiment of the novel adjustable pressure fuel filler cap of the present invention, wherein: the upper side surface of the sealing cover is designed in an arc shape, and the upper side surface of the sealing cover is closely attached to the lower side surface of the bracket.

[0014] As a preferred embodiment of the novel adjustable pressure fuel filler cap of the present invention, wherein: the inner diameter of the fixed cover is larger than the inner diameter of the fixed pipe, and the upper side surface of the fixed cover is closely attached to the lower side surface of the pressure regulating diaphragm.

[0015] As a preferred embodiment of the novel adjustable pressure fuel filler cap of the present invention, wherein: a thread ring is fixedly connected to the surface of the screw rod, and the thread ring is threadedly connected to the inner wall of the fixed pipe.

[0016] The beneficial effects of the present invention:

[0017] 1. When the internal air pressure of the diesel engine reaches the critical point, the gas will push the pressure-regulating diaphragm to move upward inside the fixed pipe, and the pressure-regulating diaphragm will move to the upper side area of the air inlet, allowing the gas to enter the air inlet and flow towards the air groove, and then enter the pressure relief groove. Subsequently, the gas will push the sealing cover downward, causing the sealing cover to slide out of the pressure relief groove, and further enabling the gas to be discharged outward. The discharged part of the gas will reduce the internal air pressure of the diesel engine, protect the internal parts of the diesel engine, avoid damage to the parts caused by air pressure, and extend the service life of the diesel engine.

[0018] 2. After the gas is discharged and the air pressure decreases, the pressure-regulating diaphragm will move downward under the elastic force of the pressure-regulating spring, causing the pressure-regulating diaphragm to fit with the fixed cover to block the gas from entering the air inlet. At the same time, the return spring will push the fixed plate upward, and the sliding rod fixedly connected to the fixed plate will drive the sealing cover to move upward and reset, causing the sealing cover to seal the pressure relief groove, preventing debris from entering the air groove and causing blockage, which may affect the normal use of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings. Among them:

[0020] Figure 1 is a three-dimensional structure schematic diagram of a novel adjustable pressure fuel filler cap proposed by the present invention;

[0021] Figure 2 is Figure 1 a three-dimensional structure bottom view schematic diagram;

[0022] Figure 3 is Figure 1 a three-dimensional structure sectional view schematic diagram;

[0023] Figure 4 is Figure 3 a schematic diagram of the enlarged structure at A in

[0024] In the figure: 100, main body unit; 101, fuel filler cap; 102, sealing groove; 103, spring groove; 104, washer; 200, pressure-regulating unit; 201, fixed pipe; 202, screw; 203, fixed cover; 204, pressure-regulating diaphragm; 205, pressure-regulating spring; 206, air inlet; 207, air groove; 208, pressure relief groove; 209, exhaust assembly; 209a, bracket; 209b, sliding rod; 209c, sealing cover; 209d, fixed plate; 209e, return spring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] To make the above objects, features, and advantages of the present utility model more obvious and understandable, the following detailed description of the specific embodiments of the present utility model will be provided in conjunction with the accompanying drawings of the specification.

[0026] In the following description, many specific details are set forth in order to provide a thorough understanding of the present utility model. However, the present utility model may be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0027] Secondly, the so-called "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation manner of the present utility model. The phrase "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0028] Thirdly, the present utility model will be described in detail in conjunction with the schematic diagrams. When detailing the embodiments of the present utility model, for the convenience of explanation, the cross-sectional views showing the device structure will be enlarged locally in a non-general proportion, and the schematic diagrams are only examples and should not limit the scope of protection of the present utility model herein. In addition, in actual production, three-dimensional spatial dimensions including length, width, and depth should be included.

[0029] Referring to Figures 1-4 , the present utility model provides a novel adjustable pressure fuel filler cap, including:

[0030] A main body unit 100, including a fuel filler cap 101. A sealing groove 102 and a spring groove 103 are formed on the lower surface of the fuel filler cap 101. A gasket 104 is fixedly connected to the inner wall surface of the sealing groove 102 to enhance the sealing performance of the fuel filler cap 101;

[0031] The pressure regulating unit 200 includes a fixed pipe 201 fixedly connected to the top inner wall of the spring groove 103. The lower end of the fixed pipe 201 is detachably connected to a screw rod 202. A fixed cover 203 is fixedly connected to the lower side surface of the screw rod 202. A pressure regulating diaphragm 204 is slidably connected to the outside of the fixed pipe 201. A pressure regulating spring 205 is fixedly connected to the upper side surface of the pressure regulating diaphragm 204, and the upper end of the pressure regulating spring 205 is fixedly connected to the top inner wall of the spring groove 103. The outer side surface of the pressure regulating diaphragm 204 is slidably connected to the inner wall surface of the spring groove 103. An air inlet 206 is provided on one inner wall of the fixed pipe 201. An air groove 207 is provided inside the fuel filling cap 101, and one end of the air groove 207 is communicated with the fixed pipe 201. A pressure relief groove 208 is provided on the lower side surface of the fuel filling cap 101, and the top inner wall of the pressure relief groove 208 is communicated with the other end of the air groove 207. The relieved gas can enter the inside of the fixed pipe 201 through the air inlet 206, then flow into the air groove 207, and finally be discharged through 208. An exhaust assembly 209 is provided inside the pressure relief groove 208.

[0032] Among them, the exhaust assembly 209 includes a bracket 209a fixedly connected to the inner wall surface of the pressure relief groove 208. A sliding rod 209b is slidably connected inside the bracket 209a, and a sealing cover 209c is fixedly connected to the lower end of the sliding rod 209b. The outer side surface of the sealing cover 209c is movably connected to the inner wall surface of the pressure relief groove 208. When relieving pressure, the sliding rod 209b slides inside the bracket 209a, and the sealing cover 209c moves downward to open the pressure relief groove 208 for exhausting air outward.

[0033] Furthermore, a fixing plate 209d is fixedly connected to the upper end of the sliding rod 209b, and a return spring 209e is fixedly connected to the lower side surface of the fixing plate 209d, and the lower end of the return spring 209e is fixedly connected to the bracket 209a. After the pressure relief ends, the fixing plate 209d moves upward under the elastic force of the return spring 209e, and the sliding rod 209b fixedly connected to the fixing plate 209d drives the sealing cover 209c to move upward to close the pressure relief groove 208 and prevent sundries from entering and causing blockage.

[0034] Furthermore, the upper side surface of the sealing cover 209c is designed to be arc-shaped, and the upper side surface of the sealing cover 209c is closely attached to the lower side surface of the bracket 209a. The arc-shaped design can guide the sealing cover 209c to slide into the pressure relief groove 208 to avoid jamming.

[0035] Furthermore, the inner diameter dimension of the fixed cover 203 is larger than the inner diameter dimension of the fixed pipe 201. The upper side surface of the fixed cover 203 is closely attached to the lower side surface of the pressure regulating diaphragm 204. Under the elastic force of the pressure regulating spring 205, the pressure regulating diaphragm 204 is closely attached to the fixed cover 203, which has a sealing effect and at the same time prevents the pressure regulating diaphragm 204 from detaching from the fixed pipe 201.

[0036] Furthermore, a thread ring is fixedly connected to the surface of the screw rod 202, and the thread ring is threadedly connected to the inner wall of the fixed pipe 201. Rotating the fixed cover 203 drives the screw rod 202 to rotate threadedly inside the fixed pipe 201, and the screw rod 202 can be withdrawn from the inside of the fixed pipe 201, so as to clean the air groove 207 and the inside of the fixed pipe 201.

[0037] During the use process, when the internal air pressure of the diesel engine reaches the critical point, the gas will push the pressure regulating diaphragm 204 to move upward inside the fixed pipe 201, and make the pressure regulating diaphragm 204 move to the upper side area of the air inlet 206, so that the gas enters the air inlet 206 and flows towards the air groove 207, and then enters the pressure relief groove 208. Then, the gas will push the sealing cover 209c to move downward, so that the sealing cover 209c slides out of the pressure relief groove 208, and thus the gas is discharged outwards. The discharged part of the gas will reduce the internal air pressure of the diesel engine. After the gas is discharged and the air pressure is reduced, the pressure regulating diaphragm 204 will move downward under the elastic force of the pressure regulating spring 205, so that the pressure regulating diaphragm 204 fits with the fixed cover 203 to block the gas entering from the air inlet 206. At the same time, the return spring 209e pushes the fixing plate 209d to move upward, and the sliding rod 209b fixedly connected to the fixing plate 209d drives the sealing cover 209c to move upward and reset, so that the sealing cover 209c seals the pressure relief groove 208, so that no sundries will enter the air groove 207 and cause blockage.

[0038] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A novel adjustable pressure fuel filler cap, characterized in that: Comprising: A main body unit (100) including a fuel filler cap (101), a sealing groove (102) and a spring groove (103) are formed on the lower surface of the fuel filler cap (101), and a gasket (104) is fixedly connected to the inner wall surface of the sealing groove (102); A pressure regulating unit (200) including a fixed pipe (201) fixedly connected to the top of the inner wall of the spring groove (103), and a screw rod (202) is detachably connected to the lower end of the fixed pipe (201), a fixed cover (203) is fixedly connected to the lower surface of the screw rod (202), a pressure regulating diaphragm (204) is slidably connected to the outside of the fixed pipe (201), a pressure regulating spring (205) is fixedly connected to the upper surface of the pressure regulating diaphragm (204), and the upper end of the pressure regulating spring (205) is fixedly connected to the top of the inner wall of the spring groove (103), the outer surface of the pressure regulating diaphragm (204) is slidably connected to the inner wall surface of the spring groove (103), an air inlet (206) is formed on one inner wall of the fixed pipe (201), an air groove (207) is formed inside the fuel filler cap (101), and one end of the air groove (207) is communicated with the fixed pipe (201), a pressure relief groove (208) is formed on the lower surface of the fuel filler cap (101), and the top of the inner wall of the pressure relief groove (208) is communicated with the other end of the air groove (207), and an exhaust assembly (209) is arranged inside the pressure relief groove (208).

2. The novel adjustable pressure fuel filler cap according to claim 1, wherein: The exhaust assembly (209) includes a bracket (209a) fixedly connected to the inner wall surface of the pressure relief groove (208), a slide rod (209b) is slidably connected inside the bracket (209a), and a sealing cover (209c) is fixedly connected to the lower end of the slide rod (209b), and the outer surface of the sealing cover (209c) is movably connected to the inner wall surface of the pressure relief groove (208).

3. The novel adjustable pressure fuel filler cap according to claim 2, characterized in that: A fixing plate (209d) is fixedly connected to the upper end of the slide rod (209b), a return spring (209e) is fixedly connected to the lower surface of the fixing plate (209d), and the lower end of the return spring (209e) is fixedly connected to the bracket (209a).

4. The novel adjustable pressure fuel filler cap according to claim 3, characterized in that: The upper surface of the sealing cover (209c) is designed in an arc shape, and the upper surface of the sealing cover (209c) is closely attached to the lower surface of the bracket (209a).

5. A novel adjustable pressure fuel filler cap according to claim 4, characterized in that: The inner diameter of the fixed cover (203) is larger than the inner diameter of the fixed pipe (201), and the upper surface of the fixed cover (203) is closely attached to the lower surface of the pressure regulating diaphragm (204).

6. The novel adjustable pressure fuel filler cap according to claim 1, wherein: A thread ring is fixedly connected to the surface of the screw rod (202), and the thread ring is threadedly connected to the inner wall of the fixed pipe (201).

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