Oil injection nozzle and oil injection equipment

Abstract

The oil injection nozzle comprises an oil nozzle body and a flow guide cover, an oil inlet of the oil nozzle body is in threaded connection with the flow guide cover, and an inner conical cavity is formed in the oil nozzle body. A filter element, an opening and closing plug, a guide limiting column, an elastic piece and a limiting piece with a hole are arranged in the inner conical cavity according to the oil inlet sequence, the opening and closing plug is of an outer conical structure matched with the inner conical cavity, and the guide limiting column is connected to the side, away from an oil inlet, of the opening and closing plug. The elastic piece is arranged around the guide limiting column, one end of the elastic piece abuts against the opening and closing plug, and the other end of the elastic piece abuts against the limiting piece with the hole. The oil injection nozzle filters fed oil through the filtering element, oil flow guiding is prevented through sealing fit of the opening and closing plug and the inner conical cavity, and oil pressure buffering during oil injection is achieved through fit of the elastic piece and the opening and closing plug.

Description

Technical Field

[0001] This utility model relates to the technical field of automatic oiling devices, and more specifically, to a detachable, easy-to-clean, high-pressure resistant, anti-backflow oiling nozzle with a filter and an oiling device. Background Technology

[0002] In mechanical transmission systems, lubrication of gear meshing parts is crucial for reducing wear and extending equipment life. Currently, conventional lubrication methods mainly rely on manual application or automated application using traditional equipment. Manual operation suffers from problems such as difficulty in accurately controlling the amount of oil applied and low efficiency; while traditional automated application devices require the gear to be installed behind the rotating shaft, making the operation cumbersome, and uneven lubrication can easily occur due to friction during gear rotation, even exacerbating wear on the contact surfaces. Furthermore, existing grease fittings generally have the following drawbacks: oil splashing during application can pollute the environment and attract dust; impurities mixed with grease may damage internal components; the sealing structure is prone to backflow or leakage under high oil pressure conditions; and traditional opening and closing components require stringent machining precision and are inconvenient for maintenance and disassembly. Utility Model Content

[0003] The purpose of this invention is to filter out contaminated material in the existing technology by designing a sealing structure inside the oil nozzle to prevent backflow or leakage under high oil pressure conditions, avoid oil splashing during oil filling which can easily pollute the environment and attract dust, and solve the problems of traditional opening and closing components requiring high processing precision and being inconvenient to maintain and disassemble.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an oil injector, characterized in that it includes an oil injector body and a flow guide, wherein the oil inlet of the oil injector body is threadedly connected to the flow guide, the oil injector body has an inner conical cavity, and a filter element, an opening and closing plug, a guide limiting post, an elastic element, and a perforated limiting element are respectively arranged in the order of oil inlet in the inner conical cavity, the opening and closing plug is an outer conical structure that cooperates with the inner conical cavity, the guide limiting post is connected to the side of the opening and closing plug away from the oil inlet, the elastic element is arranged around the guide limiting post and one end of the elastic element abuts against the opening and closing plug and the other end of the elastic element abuts against the perforated limiting element; the oil injector filters the incoming oil through the filter element, prevents oil from flowing through the sealing cooperation between the opening and closing plug and the inner conical cavity, and buffers the oil pressure during oil injection through the cooperation between the elastic element and the opening and closing plug.

[0005] Preferably, the diameter of the flow guide gradually increases along the direction from near the nozzle body to far away from the nozzle body.

[0006] Preferably, the outer conical side of the opening and closing plug is further provided with a sealing structure, the sealing structure being a trapezoidal groove surrounding the outer conical side and a trapezoidal sealing ring built into the trapezoidal groove, the trapezoidal sealing ring being interference-fitted into the trapezoidal groove.

[0007] Preferably, the axial depth of the trapezoidal groove is less than the axial height of the trapezoidal sealing ring, so as to achieve axial pre-tightening of the trapezoidal sealing ring.

[0008] Preferably, the outer edge of the flared end of the deflector is provided with a splash-proof flange to reduce oil splashing.

[0009] Preferably, the opening / closing plug and the guide limiting post are integrally formed.

[0010] Preferably, the filter element is a detachable and replaceable multi-layer metal filter structure.

[0011] Preferably, the surface of the guide limiting post is provided with an axial guide groove to ensure that the compression direction of the elastic element is consistent with the axis.

[0012] Preferably, an oil storage tank with an annular groove structure is provided below the inner conical cavity to store grease and maintain pressure stability.

[0013] An oil injection device comprising an oil injection nozzle as described above.

[0014] This invention offers the following advantages: The gradually expanding diameter design of the guide shield reduces oil splashing, while a filter element intercepts impurities to protect the internal structure. The conical-surface fitting of the opening and closing plug, combined with the trapezoidal high-pressure sealing ring, achieves high sealing and anti-backflow functionality while reducing machining precision. The spring and guide limit post work together to ensure pressure buffering and reset stability, and the perforated limit component and threaded connection facilitate disassembly and maintenance. The oil reservoir and trapezoidal groove design further optimize pressure holding and sealing ring positioning. Through modular design and functional integration, this invention significantly improves the accuracy, reliability, and ease of maintenance of lubrication operations, effectively solving the technical bottlenecks of traditional lubrication methods. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a cross-sectional view of the present invention.

[0017] Figure 2 This is a three-dimensional schematic diagram of the present invention.

[0018] In the diagram: 1-Injector body, 2-Guide shield, 3-Filter element, 4-Opening and closing plug, 5-Trapezoidal high-pressure sealing ring, 6-Spring, 7-Perforated limiting component, 8-Guide limiting post, 9-Trapezoidal groove, 10-Oil reservoir. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0020] Example

[0021] The following are merely preferred embodiments of this utility model. The protection scope of this utility model is not limited to the following embodiments. All technical solutions that fall within the scope of this utility model are protected.

[0022] Reference manual attached Figure 1-2This utility model embodiment provides a detachable, easy-to-clean, high-pressure resistant, anti-backflow oil nozzle with a filter device, including the following core components: The main body of the nozzle (1) is a cylindrical metal structure used to connect the perforated limiting component (7). The inner conical cavity is adapted to the outer conical structure of the opening and closing plug (4) to form a surface contact seal. The guide shield (2) is fixed to the oil inlet end of the nozzle body (1) by a threaded connection. Its diameter gradually increases from the end near the body to the end far from the body. The outer edge of the flared end is provided with an annular anti-splash flange to effectively reduce oil splashing during oil filling. The filter element (3) adopts a detachable multi-layer stainless steel metal filter screen, which is installed at the oil inlet of the nozzle body (1) through a snap-fit ​​structure. The opening and closing plug (4) has a plunger-shaped structure that matches the inner conical cavity of the nozzle body (1) to achieve a surface seal. The bottom slides with the guide limiting post (8) to ensure that the opening and closing plug (4) moves along the axis. The trapezoidal high-pressure sealing ring (5) is interference-fitted into the trapezoidal groove (9) of the nozzle body (1) to achieve axial pre-tightening sealing. The spring (6) is sleeved on the guide limit post (8) and is made of corrosion-resistant alloy steel. It compresses and buffers the oil pressure during oil injection and pushes the opening and closing plug (4) to reset after oil injection. The perforated limit piece (7) is fixed to the end of the nozzle body (1) by threaded connection to limit the maximum stroke of the opening and closing plug (4) and guide the grease to the target part. The guide limit post (8) is fixed inside the nozzle body (1) and has two symmetrical axial guide grooves on its surface to ensure that the spring (6) moves along the axis when compressed and avoids deflection. The trapezoidal groove (9) is located on the inner wall of the nozzle body (1) and its width is adapted to the trapezoidal high-pressure sealing ring (5). The sealing ring is axially positioned by interference fit. The oil reservoir (10) is an annular groove structure located below the conical cavity inside the nozzle body (1) to store grease to maintain pressure stability.

[0023] In this embodiment, during the oil injection stage: the oil gun is aimed at the oil injection port of the guide cover (2) and injects grease. The oil pressure pushes the opening and closing plug (4) to move downward, compressing the spring (6). After the grease passes through the filter element (3) to intercept impurities, it enters the oil storage tank (10) and the target lubrication part through the flow hole of the perforated limiting part (7). During the filtration and anti-backflow stage: after the oil injection ends and the oil pressure decreases, the spring (6) rebounds and pushes the opening and closing plug (4) to reset. Its outer conical surface fits tightly with the inner conical cavity to form the first seal. At the same time, the trapezoidal high-pressure sealing ring (5) expands under high oil pressure and is interference-fitted with the trapezoidal groove (9) to form the second seal, thus doubly preventing grease backflow. During the pressure holding and maintenance stage: the grease stored in the oil storage tank (10) maintains local pressure stability during the pressure holding stage. After disassembling the guide cover (2) and the perforated limiting part (7), the filter element (3) can be taken out for cleaning or replacement, making maintenance convenient.

[0024] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. An oil filler neck, characterized by The oil nozzle body and the fairing are screwed together at the oil inlet of the oil nozzle body, the oil nozzle body has an inner conical cavity, the inner conical cavity is provided with a filter element, an opening and closing plug, a guide limiting column, an elastic element and a hole limiting element in sequence from the oil inlet, the opening and closing plug is an outer conical structure matched with the inner conical cavity, the guide limiting column is connected to the side of the opening and closing plug away from the oil inlet, the elastic element is arranged around the guide limiting column and abuts to the opening and closing plug at one end and to the hole limiting element at the other end; the oil nozzle filters the incoming oil through the filter element, prevents the oil from flowing through the sealing cooperation of the opening and closing plug and the inner conical cavity, and buffers the oil pressure during oil injection through the cooperation of the elastic element and the opening and closing plug.

2. The oil filler neck of claim 1, wherein, The caliber of the fairing gradually increases from the direction close to the oil nozzle body to the direction away from the oil nozzle body.

3. The oil filler neck of claim 1, wherein, The outer conical side of the opening and closing plug is further provided with a sealing structure, the sealing structure is a trapezoidal groove arranged around the outer conical side and a trapezoidal sealing ring built-in the trapezoidal groove, and the trapezoidal sealing ring is interference-fitted in the trapezoidal groove.

4. The oil filler neck of claim 3, wherein, The axial depth of the trapezoidal groove is less than the axial height of the trapezoidal sealing ring, so as to realize the axial pre-tightening of the trapezoidal sealing ring.

5. The oil filler neck of claim 2, wherein, The flared end of the fairing is provided with a splash-proof flange to reduce the splashing of oil.

6. The oil filler neck of claim 1, wherein, The opening and closing plug and the guide limiting column are integrally formed.

7. The oil filler neck of claim 1, wherein, The filter element is a multi-layer metal filter screen structure that can be disassembled and replaced.

8. The oil filler neck of claim 6, wherein, The surface of the guide limiting column is provided with an axial guide groove to ensure that the compression direction of the elastic element is consistent with the axis.

9. The oil filler neck of claim 1, wherein, The inner conical cavity is further provided with an annular groove structure oil storage groove below for storing grease to maintain pressure stability.

10. An oiling apparatus characterized by: It comprises the oil nozzle as claimed in any one of claims 1-9. It comprises the oil nozzle as claimed in any one of claims 1-9.

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