Self-locking type precise oil injection structure

Abstract

The utility model discloses a self-locking type precise oil injection structure which comprises an oil injection pipe, a shrinkage sleeve piece is installed in the oil injection pipe, a grease nipple is clamped at one end of the shrinkage sleeve piece, an oil injection nozzle is assembled in the shrinkage sleeve piece, a sealing step is arranged in the oil injection pipe, a valve element is arranged on one side of the sealing step, and a sealing ring is arranged on the other side of the sealing step. A second compression spring is assembled on one side of the valve element, one side of the valve element tightly presses a sealing head at one end of the oil injection nozzle, and the sealing head is attached to the sealing step. The self-locking oil injection device has the advantages that the valve element in the oil injection pipe and the sealing step in the oil injection pipe are closed through downward pressing of the second compression spring and oil pressure in the oil injection pipe, and closing self-locking is achieved; the grease injection nozzle is pressed downwards to drive the six-claw head to descend synchronously, the grease nipple is clamped through taper shrinkage, installation is flexible, and looseness is not prone to occurring.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical oil nozzle manufacturing technology, and more specifically, it relates to a self-locking precision oil injection structure. Background Technology

[0002] Currently, grease nipples are one of the structures used for lubrication of mechanical equipment. During the operation of mechanical equipment, it is often necessary to use grease nipples to add lubricating grease to the mechanical equipment in order to ensure the lubrication effect of the mechanical equipment during operation.

[0003] Chinese patent CN220930826U discloses a grease nozzle, including a shell and a sealing plug made of an elastic material. One end of the shell is an inlet for connecting to a grease gun, and the other end is an outlet for connecting to a receiving port. The inner wall of the outlet has a first stepped surface. The shell is hollow and has a grease channel. The sealing plug is movably disposed within the grease channel. The grease channel has an anti-slip surface near the outlet to prevent the sealing plug from sliding out of the outlet. One end of the sealing plug seals against the inner wall of the shell, and the other end seals against the receiving port. The sealing plug is hollow and has an outlet channel. The outlet of this grease nozzle is flat, with a larger area for easier connection to the receiving port. The sealing plug provides a seal to prevent leakage. Its structure is simple, its cost is low, and it is more suitable for low-pressure filling.

[0004] While this method can prevent oil leakage, the sealing plugs used in this structure will wear out and break down over time, requiring regular replacement, which is very inconvenient. Most existing grease nipples use threaded connections or manual press-type structures, and the oil circuit cannot automatically close after grease filling, leading to oil backflow or contamination. Grease nipples are usually fixed by external clamps or threads, which are prone to loosening and cannot be installed flexibly. Utility Model Content

[0005] In view of the shortcomings of the prior art, this utility model provides a self-locking precision oil injection structure to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution: a self-locking precision oil injection structure, including an oil injection pipe, a shrink sleeve installed inside the oil injection pipe, a grease nipple clamped at one end of the shrink sleeve, an oil injection nozzle assembled inside the shrink sleeve, a sealing step provided inside the oil injection pipe, a valve core provided on one side of the sealing step, a second compression spring assembled on one side of the valve core, and the valve core pressing a sealing head at one end of the oil injection nozzle, the sealing head fitting against the sealing step.

[0007] As an optional solution of this utility model, both ends of the oil injection pipe are provided with threaded ports, one end of which is connected to the equipment and the other end is threaded to the assembly head, one end of which is provided with a tapered assembly port.

[0008] As an optional solution of this utility model, the oil nozzle is equipped with a first compression spring, and the end of the first compression spring is in close contact with the shrinkage kit.

[0009] As an optional solution of this utility model, the shrink kit includes a six-jaw head, the bottom of which is provided with a threaded surface, and a buffer sleeve is threadedly connected through the threaded surface. The buffer sleeve is fitted on the outside of the oil injection nozzle, and the bottom of the buffer sleeve is pressed against a first compression spring.

[0010] As an optional solution of this utility model, the end of the six-claw head is provided with a taper, and the tapered contraction of the six-claw head clamps the grease fitting.

[0011] As an optional solution of this utility model, the oil nozzle is provided with multiple oil outlets, which are arranged in a circumferential array around the axis of the oil nozzle.

[0012] This utility model provides a self-locking precision oil injection structure, which has the following beneficial effects:

[0013] The second compression spring and the oil pressure in the oil injection pipe press down to close the valve core inside the oil injection pipe with the sealing step inside the oil injection pipe, so that the oil in the oil injection pipe is locked in the rear oil circuit, achieving self-locking. When the oil injection nozzle is pressed down, the six-jaw head descends synchronously and clamps the grease nipple by tapering contraction, which is flexible and not easy to slip. The sealing head at one end of the oil injection nozzle drives the valve core to move backward, opening the oil passage and realizing oil injection. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is an exploded view of the structure of this utility model;

[0016] Figure 3 This is a side view of the present invention;

[0017] Figure 4 This is a cross-sectional view of the present invention.

[0018] In the diagram: 1. Oil filling pipe; 101. Threaded port; 2. Grease nipple; 3. Assembly head; 301. Assembly port; 4. Six-jaw head; 5. Buffer sleeve; 6. First compression spring; 7. Valve core; 8. Second compression spring; 9. Oil filling nozzle; 901. Oil outlet; 902. Sealing head. Detailed Implementation

[0019] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0020] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] Please see Figures 1 to 4 This utility model provides a technical solution: a self-locking precision oil injection structure 9, including an oil injection pipe 1, both ends of which are provided with threaded ports 101, one end of which is connected to a device and the other end is threaded to an assembly head 3. One end of the assembly head 3 is provided with a tapered assembly port 301, a shrink fitting is installed in the assembly port 301, one end of the shrink fitting is clamped with a grease nipple 2, an oil injection nozzle 9 is installed in the shrink fitting, and a first compression spring 6 is installed on the oil injection nozzle 9, with the end of the first compression spring 6 pressed against the shrink fitting.

[0023] A sealing step is provided inside the oil injection pipe 1. A valve core 7 is provided on one side of the sealing step. A second compression spring 8 is installed on one side of the valve core 7. The valve core 7 presses against the sealing head 902 at one end of the oil injection nozzle 9. The sealing head 902 is attached to the sealing step. The oil injection nozzle 9 is provided with multiple oil outlets 901. The multiple oil outlets 901 are arranged in a circular array around the axis of the oil injection nozzle 9.

[0024] The shrink-fit kit includes a six-jaw head 4, the end of which is tapered. The tapered end of the six-jaw head 4 is used to shrink and clamp the grease nipple 2. The bottom of the six-jaw head 4 is provided with a threaded surface, through which a buffer sleeve 5 is threadedly connected. The buffer sleeve 5 is assembled on the outside of the grease nipple 9, and the bottom of the buffer sleeve 5 presses against the first compression spring 6. The first compression spring 6 provides a certain buffering effect to prevent excessive oil pressure from damaging the components. The preload of the first compression spring 6 and the second compression spring 8 is greater than the axial thrust generated by the 0.5MPa oil pressure.

[0025] The specific usage and function of this embodiment: In the initial state, the second compression spring 8 and the oil pressure in the oil injection pipe 1 press down to close the valve core 7 inside the oil injection pipe 1 and the sealing step inside the oil injection pipe 1, so that the oil in the oil injection pipe 1 is locked in the rear oil circuit. When the oil injection nozzle 9 is aligned with the grease nipple 2, the oil injection nozzle 9 is pressed down, the six-jaw head 4 descends synchronously and clamps the grease nipple 2 by tapering. The sealing head 902 at one end of the oil injection nozzle 9 drives the valve core 7 to retract, the oil passage opens, and the oil will enter the rear oil circuit from the oil outlet 901 on the oil injection nozzle 9, thereby realizing oil injection.

[0026] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A self-locking precision oil injection structure, characterized in that: The utility model provides an oil injection pipe (1) is provided with a shrink sleeve inside, one end of the shrink sleeve is clamped with a grease nipple (2), an oil injection nipple (9) is assembled inside the shrink sleeve, a sealing step is arranged in the oil injection pipe (1), a valve core (7) is arranged on one side of the sealing step, a second compression spring (8) is assembled on one side of the valve core (7), a sealing head (902) at one end of the oil injection nipple (9) is pressed by one side of the valve core (7), and the sealing head (902) is attached on the sealing step.

2. The self-locking precise oil injection structure according to claim 1, characterized in that: Both ends of the oil injection pipe (1) are provided with threaded mouths (101), one threaded mouth (101) is connected with equipment, and the other threaded mouth is connected with an assembly head (3) through threading, one end of the assembly head (3) is provided with a tapered assembly mouth (301).

3. The self-locking precise oil injection structure according to claim 1, characterized in that: A first compression spring (6) is assembled on the oil injection nipple (9), and the end of the first compression spring (6) is attached to the shrink sleeve.

4. The self-locking precise oil injection structure according to claim 2, characterized in that: The shrink sleeve includes a six-prong head (4), the bottom of the six-prong head (4) is provided with a threaded surface, a buffer sleeve (5) is connected through the threaded surface, the buffer sleeve (5) is assembled outside the oil injection nipple (9), and the bottom of the buffer sleeve (5) is pressed against the first compression spring (6).

5. The self-locking precise oil injection structure according to claim 4, characterized in that: The end of the six-prong head (4) is provided with a taper, and the taper of the six-prong head (4) is used to shrink and clamp the grease nipple (2).

6. The self-locking precise oil injection structure according to claim 5, characterized in that: A plurality of oil outlets (901) are arranged on the oil injection nipple (9), and the plurality of oil outlets (901) are arranged in a circular array along the axis of the oil injection nipple (9).

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