Oil nozzle with pressure relief function

Abstract

The utility model discloses an oil nozzle with a pressure relief function, and belongs to the field of lubricating oil nozzles. The oil nozzle with the pressure relief function comprises an oil nozzle body, the oil nozzle body is provided with an oil inlet end and a connecting section, an oil drainage groove is formed in the outer wall of the connecting section, the lower end of the oil drainage groove extends to the inner side end of the connecting section, and the upper end of the oil drainage groove extends to the outer side end of the connecting section. The oil drainage groove is formed in the outer wall of the connecting section of the oil nozzle body, whether grease is fully filled or not can be visually shown through the oil drainage groove, after the grease is fully filled, the grease can overflow from the oil drainage groove to represent that the grease is fully filled, reliable indication is provided for stopping oiling, negative effects on a machine due to less or more manual grease filling are avoided, and the service life of the machine is prolonged. And the service life of the machine is prolonged.

Description

Technical Field

[0001] The utility model relates to a lubricating oil nozzle, more particularly to an oil nozzle with a pressure relief function. Background Art

[0002] In some mechanical equipment requiring grease lubrication, a grease nozzle is typically installed through a connecting pipe to connect a grease gun to the mechanical equipment for grease application. As the connecting component between the grease gun and the mechanical equipment, the grease nozzle typically features a one-way grease injection structure, allowing the grease gun to inject oil into the nozzle while a seal, such as a steel ball, is used to seal the reverse direction.

[0003] The structural principle of existing grease nozzles can be referred to the "A High-Pressure Grease Nozzle" disclosed in Chinese Patent No. ZL202320672911.3 (authorization announcement date: September 8, 2023). It includes a grease nozzle body, the inner cavity of the grease nozzle body having an inner cone structure, the upper and lower ends of the inner cavity are connected to the outside, and the inner diameter of the upper portion of the inner cavity is smaller than the inner diameter of the lower portion of the inner cavity; a plunger, which is arranged in the inner cavity of the grease nozzle body and has an outer cone structure, and the inner cone structure of the grease nozzle body and the outer cone structure of the plunger are matched with each other; an annular groove is formed on the outer cone structure of the plunger; a high-pressure sealing ring, which is located between the inner cone structure of the plunger and the outer cone structure of the plunger and is sleeved on the annular groove; a perforated stopper, which is fixed to the bottom of the inner cavity of the grease nozzle body; and a spring, which is arranged in the inner cavity of the grease nozzle body and is limited between the plunger and the perforated stopper. The outer periphery of the grease nozzle body is usually provided with an external thread for sealing connection to mechanical equipment or connecting pipes. In actual use, it is found that when adding grease using a grease gun, the amount added is not displayed, and it may be too little or too much. Too little will lead to incomplete lubrication and machine wear; too much may cause many plastic parts and rubber seals to be pushed open by the high-pressure grease, causing damage to the seals and pipes. Summary of the Invention

[0004] 1. Technical problems to be solved by the utility model

[0005] The purpose of the utility model is to overcome the above-mentioned shortcomings of the existing oil nozzle and provide an oil nozzle with a pressure relief function. The technical solution of the utility model is adopted, by arranging an oil drain groove on the outer wall of the connecting section of the oil nozzle body, so that it can be intuitively shown whether the butter is full. When the butter is full, the oil drain groove can overflow butter, indicating that the butter is full, providing a reliable indication for stopping refueling, avoiding the negative impact on the machine caused by workers adding too little or too much butter, and helping to extend the service life of the machine.

[0006] 2. Technical solution

[0007] In order to achieve the above-mentioned purpose, the technical solution provided by the present utility model is:

[0008] The utility model provides an oil nozzle with a pressure relief function, comprising an oil nozzle body, wherein the oil nozzle body has an oil inlet end and a connecting section, an outer wall of the connecting section is provided with an oil drain groove, the lower end of the oil drain groove extends to the inner end of the connecting section, and the upper end of the oil drain groove extends to the outer end of the connecting section.

[0009] Furthermore, an external thread for installation is provided on the outer side wall of the connecting section, the oil drain groove is arranged along the busbar direction of the connecting section, and the lower end of the oil drain groove extends to the lower end surface of the connecting section; the upper part of the connecting section has a screwing portion, and a neck portion is provided between the screwing portion and the oil inlet end, and the upper end of the oil drain groove extends to the neck portion through the screwing portion.

[0010] Furthermore, the screwing portion has an external hexagonal structure.

[0011] Furthermore, the oil nozzle body is installed in the connecting sleeve through the connecting section, and the oil drain groove and the inner wall of the connecting sleeve are enclosed to form an oil drain channel.

[0012] Furthermore, a one-way oil injection mechanism is also provided in the oil nozzle body.

[0013] Furthermore, the one-way oil injection mechanism includes a sealing body, an elastic member and a limit member. A tapered hole is provided in the oil nozzle body, and the small diameter end of the tapered hole faces the oil inlet end. The sealing body is arranged in the oil nozzle body and cooperates with the tapered hole. The elastic member is arranged in the oil nozzle body and acts on the sealing body to enable the sealing body to maintain an elastic tendency of sealing cooperation with the tapered hole. The limit member is installed at the lower end of the oil nozzle body to limit the elastic member.

[0014] 3. Beneficial effects

[0015] Compared with the existing known technologies, the technical solution provided by the present invention has the following beneficial effects:

[0016] (1) The utility model is an oil nozzle with a pressure relief function, which includes an oil nozzle body, the oil nozzle body having an oil inlet end and a connecting section, an outer wall of the connecting section being provided with an oil drain groove, the lower end of the oil drain groove extending to the inner end of the connecting section, and the upper end of the oil drain groove extending to the outer end of the connecting section, the oil drain groove can be used to visually indicate whether the butter is full, when the butter is full, the butter can overflow from the oil drain groove, indicating that the butter is full, providing a reliable indication for stopping the oiling, avoiding the negative impact on the machine caused by workers adding too little or too much butter, and helping to extend the service life of the machine;

[0017] (2) The utility model is a kind of oil nozzle with pressure relief function, the outer wall of the connecting section of which is provided with an external thread for installation, the oil drain groove is arranged along the generatrix direction of the connecting section, and the lower end of the oil drain groove extends to the lower end surface of the connecting section; the upper part of the connecting section is provided with a screwing part, and a neck portion is provided between the screwing part and the oil inlet end, and the upper end of the oil drain groove extends to the neck portion through the screwing part; the oil nozzle has a simple structure, and only the oil drain groove needs to be processed on the outer side of the oil nozzle body, and the processing and manufacturing are convenient;

[0018] (3) The utility model is an oil nozzle with a pressure relief function, and its oil nozzle body is installed in the connecting sleeve through a connecting section. The oil drain groove and the inner wall of the connecting sleeve are enclosed to form an oil drain channel, which facilitates the establishment of the oil drain channel. It can not only ensure that the grease is filled, but also prevent excessive grease from increasing the internal pressure and causing damage to the parts. At the same time, the oil nozzle is arranged at the upper part of the lubrication cavity of the mechanical equipment, and no leakage of lubricating grease will occur from the oil drain groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the three-dimensional structure of a fuel nozzle with a pressure relief function according to the present invention;

[0020] Figure 2 This is a schematic cross-sectional view of a fuel nozzle with a pressure relief function according to the present invention;

[0021] Figure 3 This is a schematic diagram of the installation structure of an oil nozzle with a pressure relief function of the utility model.

[0022] Explanation of the numbers in the schematic diagram:

[0023] 1. Nozzle body; 1-1. Oil drain groove; 1-2. Oil inlet end; 1-3. Neck section; 1-4. Screw section; 1-5. Connecting section; 1-6. Tapered hole; 2. Sealing body; 3. Elastic part; 4. Limiting part; 5. Connecting sleeve. DETAILED DESCRIPTION

[0024] In order to further understand the content of the present invention, the present invention is described in detail with reference to the accompanying drawings.

[0025] Combine Figure 1As shown, the present invention provides a grease nozzle with a pressure relief function, comprising a grease nozzle body 1 having an oil inlet end 1-2 and a connecting section 1-5. The oil inlet end 1-2 is used to connect to a grease gun, and the connecting section 1-5 is used to connect to mechanical equipment so that grease can be added to the mechanical equipment via the grease gun. Unlike existing grease nozzles, an oil drain groove 1-1 is provided on the outer wall of the connecting section 1-5. The lower end of the oil drain groove 1-1 extends to the inner end of the connecting section 1-5, and the upper end of the oil drain groove 1-1 extends to the outer end of the connecting section 1-5. The "inner end" refers to the end connected to the lubrication chamber of the mechanical equipment, and the "outer end" refers to the end that is connected to the atmosphere. The lubrication chamber of the mechanical equipment is connected to the atmosphere through the oil drain groove 1-1. If further grease is added after the lubricant is fully filled, the increased internal pressure will cause some of the grease to overflow through the oil drain groove 1-1. This overflow can be observed by the worker, visually indicating whether the grease is full. This provides a reliable indicator for workers to stop refueling, preventing workers from under- or over-filling the machine, which could negatively impact the machine and extend its service life. Because industrial grease is a thick, greasy, semi-solid substance at room temperature, it will not overflow from the oil drain groove 1-1 during the filling process, improving the accuracy of the full-fill indicator. Furthermore, the grease nipple is typically located at the top of the lubrication chamber of the mechanical equipment, and because grease itself has poor fluidity, it will not leak from the small oil drain groove 1-1.

[0026] The present invention will be further described below with reference to the embodiments.

[0027] [Example]

[0028] like Figure 1 and Figure 2 As shown, an oil nozzle with a pressure relief function in this embodiment includes an oil nozzle body 1, the oil nozzle body 1 has an oil inlet end 1-2 and a connecting section 1-5, the oil inlet end 1-2 has an adapting structure connected to a grease gun, and the connecting section 1-5 has an adapting structure for connecting to mechanical equipment, and an oil drain groove 1-1 is provided on the outer wall of the connecting section 1-5. The lower end of the oil drain groove 1-1 extends to the inner end of the connecting section 1-5, and the upper end of the oil drain groove 1-1 extends to the outer end of the connecting section 1-5, so that the inner side of the oil nozzle body 1 can be connected to the external environment through the side oil drain groove 1-1. During the grease filling process, the grease gun is connected to the oil inlet end 1-2 for refueling. When the grease is full, some grease will overflow from the oil drain groove 1-1, reminding the worker that it is full and to stop refueling. On the one hand, it can prevent insufficient grease from being added, resulting in incomplete lubrication, and on the other hand, it can prevent excessive grease from causing excessive internal pressure and causing damage to the equipment, especially it can prevent damage to rubber seals and hoses, etc., which is beneficial to extending the service life of the machine.

[0029] catch Figure 1 and Figure 2As shown, in this embodiment, an external thread for installation is provided on the outer sidewall of the connecting section 1-5. The oil drain groove 1-1 is arranged along the generatrix direction of the connecting section 1-5, and the lower end of the oil drain groove 1-1 extends to the lower end surface of the connecting section 1-5. The upper part of the connecting section 1-5 has a screwing part 1-4, which is used to screw the oil nozzle body 1 to facilitate threaded connection. There is a necking part 1-3 between the screwing part 1-4 and the oil inlet end 1-2. The necking part 1-3 facilitates stable connection and cooperation with the grease gun. The upper end of the oil drain groove 1-1 extends to the necking part 1-3 through the screwing part 1-4. With the above structure, the oil nozzle has a simple structure. It only needs to process the oil drain groove 1-1 on the outer side of the oil nozzle body 1, which is convenient for processing and manufacturing. The oil drain groove 1-1 can be provided with one or more on the outer side of the oil nozzle body 1, which can be determined according to specific needs. The size of the oil drain groove 1-1 can also be set according to needs. Its cross-sectional shape can be "凵"-shaped, "U"-shaped, semi-circular, etc., and can be machined by mechanical processing such as milling on the oil nozzle body 1. The screwing part 1-4 has an external hexagonal structure, and tools such as wrenches can be used to screw the oil nozzle body 1 to achieve threaded connection or disassembly. Of course, the screwing part 1-4 can also adopt other external contour shapes suitable for screwing operations.

[0030] As Figure 3 shown, in this embodiment, the oil nozzle body 1 is installed in the connecting sleeve 5 through the connecting section 1-5. The oil drain groove 1-1 and the inner wall of the connecting sleeve 5 enclose an oil drain passage, which facilitates the establishment of the oil drain passage. It can not only ensure that the grease is filled, but also prevent the internal pressure from increasing due to excessive grease filling and damaging the components. At the same time, the oil nozzle is arranged at the upper part of the lubrication cavity of the mechanical equipment, and there will be no leakage of lubricating grease from the oil drain groove. The outer contour of the connecting sleeve 5 can adopt an external hexagonal cylinder structure, and has an internal threaded hole inside, which can be screwed and connected with the external thread on the connecting section 1-5. The connecting sleeve 5 can be directly fixed on the mechanical equipment, or can be connected to the mechanical equipment through a hose or a hard pipe.

[0031] As Figure 2 and Figure 3As shown, the oil nozzle with a pressure relief function of this embodiment is further provided with a one-way oil injection mechanism within its oil nozzle body 1. This one-way oil injection mechanism is used to achieve one-way conduction of the oil nozzle body 1, that is, oil injection conduction from the oil inlet end 1-2 and reverse sealing. In a specific embodiment, the one-way oil injection mechanism includes a sealing body 2, an elastic member 3, and a limiter 4. The oil nozzle body 1 has a tapered hole 1-6, with the smaller diameter end of the tapered hole 1-6 facing the oil inlet end 1-2. The sealing body 2 is provided within the oil nozzle body 1 and cooperates with the tapered hole 1-6. The elastic member 3 is provided within the oil nozzle body 1 and acts on the sealing body 2 to ensure that the sealing body 2 maintains an elastic tendency to seal with the tapered hole 1-6. The limiter 4 is mounted at the lower end of the oil nozzle body 1 to limit the elastic member 3. Under normal conditions, the sealing body 2, under the action of the elastic member 3, always abuts the tapered hole 1-6, sealing the oil inlet channel of the oil inlet end 1-2. During oil injection, the oil injection pressure of the grease gun acts on the sealing body 2, and the oil injection pressure is greater than the elastic force of the elastic member 3. At this time, the elastic force of the elastic member 3 can be overcome to cause the sealing body 2 to move downward, thereby opening the tapered hole 1-6 and allowing grease injection. The above-mentioned sealing body 2 can be a sphere, a cone, etc.; the elastic member 3 can be a compression spring, one end of which abuts the sealing body 2 and the other end abuts the limit member 4; the limit member 4 can be an external thread nut with a center hole, or a hole-mounted retaining ring, etc., used to abut the elastic member 3, so that the one-way oil injection mechanism and the nozzle body 1 form an integral structure.

[0032] Of course, the one-way oil injection mechanism mentioned above can also adopt the one-way sealing structure in other existing grease nipples, and the shape of the grease nipple body 1 can also adopt the shape design of existing grease nipples.

[0033] In practical application, a grease nozzle with a pressure relief function according to this embodiment can be provided with a small oil drain groove 1-1 on the external thread of the connecting section 1-5 of the grease nozzle body 1. This drain groove 1-1 is used to release excess pressure within the oil pipe. When filling grease, if the grease is not fully filled, the grease will continue to flow into the oil pipe and lubrication cavity due to the blocking effect of the threaded connection structure on the connecting section 1-5. When the grease is fully filled, further filling will increase the oil pressure, causing some grease to flow out of the oil drain groove 1-1. At this point, filling can be stopped. This ensures that the grease is fully filled, avoiding excessive internal pressure caused by overfilling and thus preventing damage to mechanical equipment due to excessive oil pressure.

[0034] The utility model discloses an oil nozzle with a pressure relief function, by arranging an oil drain groove on the outer wall of the connecting section of the oil nozzle body, the oil drain groove can visually indicate whether the butter is full. When the butter is full, the oil drain groove can overflow butter, indicating that the butter is full, providing a reliable indication for stopping the oil refueling, avoiding the negative impact on the machine caused by workers adding too little or too much butter, and being beneficial to extending the service life of the machine.

[0035] The above schematically describes the present invention and its embodiments, which is not intended to be limiting. The accompanying drawings illustrate only one embodiment of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by this and, without departing from the spirit of the present invention, uninventively designs structures and embodiments similar to this technical solution, they shall fall within the scope of protection of the present invention.

Claims

1. A fuel nozzle with a pressure relief function, comprising a fuel nozzle body (1), wherein the fuel nozzle body (1) has an oil inlet end (1-2) and a connecting section (1-5), and is characterized in that: An oil drain groove (1-1) is provided on the outer wall of the connecting section (1-5), the lower end of the oil drain groove (1-1) extends to the inner end of the connecting section (1-5), and the upper end of the oil drain groove (1-1) extends to the outer end of the connecting section (1-5).

2. The oil nozzle with pressure relief function according to claim 1, characterized in that: An external thread for installation is provided on the outer side wall of the connecting section (1-5); the oil drain groove (1-1) is arranged along the busbar direction of the connecting section (1-5), and the lower end of the oil drain groove (1-1) extends to the lower end surface of the connecting section (1-5); the upper part of the connecting section (1-5) has a screwing portion (1-4), a neck portion (1-3) is provided between the screwing portion (1-4) and the oil inlet end (1-2), and the upper end of the oil drain groove (1-1) extends to the neck portion (1-3) through the screwing portion (1-4).

3. The oil nozzle with pressure relief function according to claim 2, characterized in that: The screwing portion (1-4) has an external hexagonal structure.

4. The oil nozzle with pressure relief function according to claim 1, 2 or 3, characterized in that: The oil nozzle body (1) is installed in the connecting sleeve (5) through the connecting section (1-5), and the oil drain groove (1-1) and the inner wall of the connecting sleeve (5) are combined to form an oil drain channel.

5. The oil nozzle with pressure relief function according to claim 4, characterized in that: A one-way oil injection mechanism is also provided in the oil nozzle body (1).

6. The oil nozzle with pressure relief function according to claim 5, characterized in that: The one-way oil injection mechanism comprises a sealing body (2), an elastic member (3) and a limiting member (4); a tapered hole (1-6) is provided in the oil nozzle body (1); the small diameter end of the tapered hole (1-6) faces the oil inlet end (1-2); the sealing body (2) is arranged in the oil nozzle body (1) and matches the tapered hole (1-6); the elastic member (3) is arranged in the oil nozzle body (1) and acts on the sealing body (2) to enable the sealing body (2) to maintain an elastic tendency to seal and match the tapered hole (1-6); the limiting member (4) is installed at the lower end of the oil nozzle body (1) and is used to limit the elastic member (3).

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