Grease gun overflow valve

Abstract

The utility model relates to the field of grease gun accessories, in particular to a grease gun air overflow valve. Comprising a valve body, an exhaust channel is formed in the valve body, and a valve rod is arranged in the exhaust channel; the valve rod is provided with an air blocking part, a sealing ring is arranged on the air blocking part in a sleeving mode, and the sealing ring is used for sealing the exhaust channel; an elastic piece is arranged between the pressing part and the valve body, and the elastic piece is used for driving the valve rod to reset, so that the air blocking part seals the exhaust channel; a plurality of convex parts are convexly formed on the cutting surface; when the valve rod is arranged in the exhaust channel, the top end of the protruding part can abut against the inner wall of the exhaust channel, a cavity is formed among the cutting face, the protruding part and the inner wall of the exhaust channel, and the cavity is used for air circulation and facilitates air exhaust.

Description

Technical Field

[0001] This utility model relates to the field of grease gun accessories, specifically a grease gun overflow valve. Background Technology

[0002] A grease gun is a manual tool used to add grease to mechanical equipment. The handle pressurizes the inside of the grease gun, and the piston rod draws grease from the grease canister and squeezes it out from the nozzle.

[0003] However, when there is too much air inside the grease gun, it is difficult for the operator to use the piston rod to pull out the grease inside the grease gun. Therefore, it is necessary to use the vent valve to release the air inside the grease gun so that the grease gun can work properly.

[0004] For example, in the oil discharge system and grease gun disclosed in Chinese patent application number CN202323169118.0, the pressure regulating component has a relatively simple structure and cannot guarantee the air discharge effect. Utility Model Content

[0005] The purpose of this invention is to provide a grease gun overflow valve that can more stably and smoothly discharge the gas inside the grease gun.

[0006] The purpose of this utility model is achieved as follows:

[0007] A grease gun vent valve includes a valve body, in which an exhaust channel is formed and a valve stem is disposed within the exhaust channel;

[0008] The valve stem is provided with:

[0009] An air baffle is fitted with a sealing ring, which is used to seal the exhaust passage.

[0010] A pressing part is provided between the pressing part and the valve body, and the elastic element is used to drive the valve stem to reset, so that the air blocking part closes the exhaust passage.

[0011] The cutting surface has several protrusions formed on it;

[0012] When the valve stem is disposed in the exhaust channel, the top end of the protrusion can abut against the inner wall of the exhaust channel, and a cavity is formed between the cutting surface, the protrusion and the inner wall of the exhaust channel. This cavity is used for gas flow to facilitate the discharge of air.

[0013] Preferably, the protrusion has a beveled portion, making the protrusion triangular, and the tip of the protrusion faces the air-blocking portion;

[0014] or,

[0015] The protrusion is trapezoidal, and the upper bottom of the protrusion faces the air-blocking part.

[0016] Preferably, the upper end face of the protrusion extends 1-3 mm beyond the outer wall of the valve stem.

[0017] Preferably, the air baffle is formed with a threaded groove for connecting a bolt, and a pressure plate is formed protruding on the bolt, with the sealing ring abutting against the pressure plate;

[0018] When the bolt is connected to the air baffle, the clamping plate can press the sealing ring onto the valve body, thereby sealing the exhaust passage.

[0019] Preferably, the air-blocking part has a protruding ring portion, and the sealing ring abuts against the protruding ring portion.

[0020] Preferably, a limiting groove is recessed on the valve body, and the exhaust channel leads to the bottom of the limiting groove;

[0021] When the valve stem passes through the exhaust channel, one end of the elastic element is positioned in the limiting groove.

[0022] Preferably, a plastic sleeve is fitted onto the valve stem, and the plastic sleeve abuts against the pressing part.

[0023] The outstanding and beneficial technical effects of this utility model compared to the prior art are:

[0024] 1. The valve stem in this technical solution has a cut surface formed on it, and a protrusion is formed on the cut surface. When the valve stem is placed in the exhaust channel, the airflow will be discharged to the outside through the space formed between the cut surface, the protrusion and the inner wall of the exhaust channel, ensuring that the grease gun can work stably.

[0025] 2. The protrusion in this technical solution has a beveled surface. The beveled surface can reduce the area of ​​the flow channel, thereby increasing the gas flow rate in the exhaust channel, reducing the pressure in the exhaust direction, and allowing the gas inside the grease gun to be discharged more smoothly. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of this utility model;

[0027] Figure 2 This is a cross-sectional view of the present invention;

[0028] Figure 3 This is an exploded view of the valve stem, bolt, and sealing ring of this utility model;

[0029] Figure label:

[0030] 1. Valve body; 11. Exhaust passage; 12. Limiting groove;

[0031] 2. Valve stem; 21. Air baffle; 22. Pressing part; 23. Cutting surface; 24. Protrusion; 25. Beveled part; 26. Threaded groove;

[0032] 3. Plastic sleeve; 4. Sealing ring; 5. Elastic element; 6. Bolt; 61. Pressure plate. Detailed Implementation

[0033] The following are specific embodiments of the present invention, and the technical solution of the present invention will be further described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0034] Example 1

[0035] like Figures 1-3 The grease gun overflow valve shown includes a valve body 1, an exhaust channel 11 formed inside the valve body 1, and a valve stem 2 disposed inside the exhaust channel 11.

[0036] Valve stem 2 is equipped with:

[0037] The air baffle 21 is fitted with a sealing ring 4, which is used to seal the exhaust passage 11.

[0038] Pressing part 22, and elastic element 5 is provided between pressing part 22 and valve body 1. Elastic element 5 is used to drive valve stem 2 to reset, so that air blocking part 21 closes exhaust passage 11.

[0039] The cutting surface 23 has several protrusions 24 formed on it.

[0040] When the valve stem 2 is installed in the exhaust channel 11, the top of the protrusion 24 can abut against the inner wall of the exhaust channel 11, and a cavity is formed between the cutting surface 23, the protrusion 24 and the inner wall of the exhaust channel 11. This cavity is used for gas flow to facilitate the discharge of air.

[0041] The elastic element 5 pushes the pressing part 22 to move outward, and pushes the valve stem 2 through the pressing part 22, thereby causing the air-blocking part 21 to drive the sealing ring 4 to abut against the valve body 1, thus sealing the exhaust passage 11.

[0042] The user can press the pressing part 22 to move the valve stem 2 inward, so that the air blocking part 21 and the sealing ring 4 are in the valve body 1, and the exhaust passage 11 is opened to facilitate the discharge of air from the inside of the grease gun.

[0043] Specifically, such as Figure 3 As shown, the protrusion 24 has a beveled portion 25 formed on it, making the protrusion 24 triangular, and the tip of the protrusion 24 faces the air-blocking portion 21.

[0044] or,

[0045] The protrusion 24 is trapezoidal, and the upper bottom of the protrusion 24 faces the air baffle 21.

[0046] In this embodiment, the protrusion 24 is trapezoidal.

[0047] When the valve stem 2 is installed in the exhaust channel 11, since the area of ​​the lower bottom of the protrusion 24 is larger than the area of ​​the upper bottom, the lower bottom of the protrusion 24 can cover more area in the exhaust channel 11 than the upper bottom of the protrusion 24.

[0048] Therefore, the flow area of ​​air passing through the upper bottom of the protrusion 24 within the cavity is greater than the flow area of ​​air passing through the lower bottom of the protrusion 24 within the cavity. Since the total amount of air is fixed, the air velocity will increase when the flow area decreases. Furthermore, according to Bernoulli's principle, the faster the fluid velocity, the lower the pressure.

[0049] Therefore, the air pressure at the upper bottom of the protrusion 24 is greater than the air pressure at the lower bottom of the protrusion 24, which further promotes the expulsion of air from inside the grease gun.

[0050] When the valve stem 2 is installed in the exhaust channel 11, the side wall of the valve stem 2 is not attached to the inner side wall of the exhaust channel 11, so that there is a space between the valve stem 2 and the inner side wall of the exhaust channel 11 for air to flow.

[0051] Furthermore, the upper end face of the protrusion 24 extends 1-3mm beyond the outer wall of the valve stem 2, allowing the upper end face of the protrusion 24 to be closer to the inner wall of the exhaust passage 11, thereby enabling the protrusion 24 to more fully cover the space through which air can flow in the exhaust passage 11 and improve the air exhaust effect.

[0052] like Figures 1-3 As shown, the air baffle 21 has a threaded groove 26 formed on it. The threaded groove 26 is used to connect the bolt 6. The bolt 6 has a protruding pressure plate 61, and the sealing ring 4 abuts against the pressure plate 61.

[0053] When the bolt 6 is connected to the air baffle 21, the clamping plate 61 can press the sealing ring 4 onto the valve body 1, thus sealing the exhaust passage 11.

[0054] like Figure 2 As shown, a limiting groove 12 is recessed on the valve body 1, and the exhaust channel 11 leads to the bottom of the limiting groove 12.

[0055] When the valve stem 2 passes through the exhaust channel 11, one end of the elastic element 5 is set in the limiting groove 12.

[0056] like Figure 1 and Figure 2As shown, a plastic sleeve 3 is fitted onto the valve stem 2, and the plastic sleeve 3 abuts against the pressing part 22. The plastic sleeve 3 can further increase the pressing area when the operator presses the valve, thus improving comfort.

[0057]

Example 2

[0058] This embodiment is basically the same as Embodiment 1, except that the air baffle 21 and the valve stem 2 are integrally formed.

[0059] The air baffle 21 has a protruding ring portion, and the sealing ring 4 abuts against the protruding ring portion.

[0060] It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this invention, should still fall within the scope of the disclosed technical content. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0061] It should also be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or may be connected to an intermediary component. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or indirectly connected to the other component through an intermediary component.

[0062] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

Claims

1. A grease gun overflow valve, characterized in that: Includes a valve body (1), wherein an exhaust channel (11) is formed inside the valve body (1), and a valve stem (2) is provided inside the exhaust channel (11); The valve stem (2) is provided with: An air baffle (21) is fitted with a sealing ring (4), which is used to close the exhaust passage (11); Pressing part (22), an elastic element (5) is provided between the pressing part (22) and the valve body (1), the elastic element (5) is used to drive the valve stem (2) to reset, so that the air blocking part (21) closes the exhaust passage (11); The cutting surface (23) has several protrusions (24) protruding from it; When the valve stem (2) is disposed in the exhaust channel (11), the top end of the protrusion (24) can abut against the inner wall of the exhaust channel (11), and a cavity is formed between the cutting surface (23), the protrusion (24) and the inner wall of the exhaust channel (11), which is used for gas flow and facilitates air discharge.

2. The grease gun overflow valve according to claim 1, characterized in that: The protrusion (24) has a beveled portion (25) formed on it, making the protrusion (24) triangular, and the tip of the protrusion (24) faces the air-blocking portion (21); or, The protrusion (24) is trapezoidal, and the upper bottom of the protrusion (24) faces the air-blocking part (21).

3. The grease gun overflow valve according to claim 1, characterized in that: The upper end face of the protrusion (24) extends 1-3 mm beyond the outer wall of the valve stem (2).

4. A grease gun overflow valve according to any one of claims 1-3, characterized in that: The air baffle (21) has a threaded groove (26) formed on it. The threaded groove (26) is used to connect the bolt (6). The bolt (6) has a pressure plate (61) protruding from it. The sealing ring (4) abuts against the pressure plate (61). When the bolt (6) is connected to the air baffle (21), the clamping plate (61) can press the sealing ring (4) onto the valve body (1) and close the exhaust passage (11).

5. A grease gun vent valve according to any one of claims 1-3, characterized in that: The air-blocking part (21) has a protruding ring part, and the sealing ring (4) abuts against the protruding ring part.

6. A grease gun vent valve according to any one of claims 1-3, characterized in that: The valve body (1) has a recessed limiting groove (12) formed on it, and the exhaust channel (11) leads to the bottom of the limiting groove (12); When the valve stem (2) passes through the exhaust channel (11), one end of the elastic element (5) is located in the limiting groove (12).

7. A grease gun overflow valve according to any one of claims 1-3, characterized in that: A plastic sleeve (3) is fitted on the valve stem (2), and the plastic sleeve (3) abuts against the pressing part (22).

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