Adjustable overflow valve suitable for grease gun and grease gun

Abstract

The utility model discloses an adjustable overflow valve suitable for a grease gun and the grease gun, which comprise a grease gun main body provided with a connector and an overflow valve arranged on the connector, the overflow valve comprises a valve seat provided with an oil inlet, a pressure adjusting piece installed on the valve seat, a valve element arranged in the valve seat and connected with the pressure adjusting piece in a sliding and inserted mode, a ball arranged between the valve element and the oil inlet, and a spring arranged on the valve element in a penetrating and sleeving mode and capable of acting on the ball to block the oil inlet. An oil outlet penetrating through and communicating with the sliding cavity is formed in the valve seat or the pressure adjusting piece. Compared with the prior art, the grease gun has the advantages that through the arrangement of the overflow valve, when the pressure in the grease gun reaches the pressure value set by the overflow valve, the pressure in the grease gun can act on the ball to be far away from the grease inlet, so that the grease inlet, the sliding cavity and the grease outlet in the overflow valve are communicated, and the pressure in the grease gun is released; and the use safety of the grease gun is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of grease guns, in particular to a grease gun overflow valve, and in particular to an adjustable overflow valve suitable for a grease gun and a grease gun. Background Art

[0002] A grease gun is a tool used to maintain mechanical equipment or add grease to bearings in the operating parts of the equipment. It is an essential tool for agricultural machinery operators and maintenance centers due to its many advantages such as simple operation, easy portability and wide range of use.

[0003] Some patents such as the patent with authorization announcement number CN219775425U provide a suction and extrusion structure of a grease gun and a rotary grease gun, in which oil is discharged from the grease nozzle by operating the handle.

[0004] However, in actual use, the grease nozzle may come into contact with dirt or be in contact with air for a long time without being used, which may cause the grease to solidify and become clogged. If the handle of the grease gun is operated without resolving the solidification problem, the pressure in the gun head, grease nozzle and barrel of the grease gun will increase. When the pressure continues to increase, the grease nozzle is still not connected, which can easily cause local cracks at the connection of the grease gun or bursting of the barrel, posing a certain safety hazard. Utility Model Content

[0005] The utility model aims at the problem that the existing grease gun is very likely to have local cracks or bursts due to excessive internal pressure, which poses a safety hazard. The technical problem to be solved by the utility model is to provide an adjustable relief valve and a grease gun suitable for the grease gun, which can improve the safety of the grease gun when in use.

[0006] The utility model solves the above technical problems by adopting the following technical solution: an adjustable relief valve suitable for a grease gun, comprising a valve seat provided with an oil inlet, a valve core slidably arranged in the valve seat, a pressure regulating member adjustably arranged on the valve seat, and a spring arranged in the valve seat and capable of elastically acting on the valve core;

[0007] A sliding cavity is provided in the valve seat, and the oil inlet is connected to the sliding cavity;

[0008] The valve core is slidably arranged in the sliding cavity, and one end of the valve core is acted upon by a spring to block the oil inlet;

[0009] A guide rod is provided at the other end of the valve core, a guide hole is provided on the pressure regulating member, the guide rod is inserted into the guide hole, and the guide hole guides the sliding direction of the valve core in the sliding cavity;

[0010] The valve seat or the pressure regulating member is provided with a penetrating oil outlet, which is connected to the sliding cavity.

[0011] A further preferred solution of the utility model is that the valve core is provided with an insertion section inserted into the spring, and a stop end abutted against the spring, and the insertion section is located between the stop end and the guide rod.

[0012] A further preferred solution of the utility model is that the pressure regulating member is arranged on the valve seat and is threadedly connected.

[0013] A further preferred solution of the utility model is that: the pressure regulating member is provided with a plurality of continuous limiting grooves, and the valve seat is provided with limiting protrusions that can cooperate with the limiting grooves.

[0014] A further preferred solution of the utility model is that one end of the valve core adopts a spherical or conical structure.

[0015] A further preferred solution of the utility model is: a V-shaped groove is provided at one end of the valve core, a ball is provided in the V-shaped groove, and the elastic force of the spring can act on the ball to block the oil inlet.

[0016] A further preferred solution of the utility model is that an oil guide member is detachably mounted on the valve core, and the oil outlet is arranged through the oil guide member.

[0017] A further preferred solution of the utility model is that a protective cover is detachably mounted on the valve seat, and the protective cover covers the oil outlet.

[0018] A further preferred solution of the utility model is: a limiting groove is provided on the valve seat, and a buckle that can be movably snapped into the limiting groove is provided on the protection cover.

[0019] Another subject of the utility model: a grease gun, comprising a grease gun body, and the above-mentioned adjustable overflow valve suitable for the grease gun;

[0020] The grease gun body is provided with a connecting head, on which an oil filling cylinder and the valve seat are detachably mounted.

[0021] Compared with the prior art, the advantage of the utility model lies in that, through the setting of the relief valve, when the pressure in the grease gun reaches the pressure value set by the relief valve, the pressure in the grease gun acts on the ball and the valve core to slide, and the ball moves away from the oil inlet, thereby realizing the conduction of the oil inlet, the sliding cavity and the oil outlet in the relief valve, and the pressure in the grease gun is released, effectively avoiding local cracks or explosions at the joints of the grease gun, and improving the safety of the grease gun when in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be described in further detail below in conjunction with the accompanying drawings and preferred embodiments. However, those skilled in the art will appreciate that these drawings are drawn only for the purpose of explaining the preferred embodiments and should not be regarded as limiting the scope of the present invention. Furthermore, unless otherwise specified, the drawings only conceptually represent the composition or structure of the described objects and may contain exaggerated displays, and the drawings are not necessarily drawn to scale.

[0023] Figure 1 This is a schematic diagram of the structure of the overflow valve of the preferred embodiment of the utility model;

[0024] Figure 2 This is an exploded view of the relief valve of the preferred embodiment of the utility model;

[0025] Figure 3 It is a cross-sectional view of a relief valve according to a preferred embodiment of the utility model;

[0026] Figure 4 This is a schematic structural diagram of a grease gun equipped with a relief valve in a preferred embodiment of the utility model;

[0027] Figure 5 This is a cross-sectional view of a relief valve in which the oil inlet is arranged on a valve seat in a preferred embodiment of the utility model;

[0028] Figure 6 It is a schematic structural diagram of a relief valve without a protective cover according to a preferred embodiment of the utility model.

[0029] In the figure: 01. Grease gun body: 1. Connector; 2. Oil filling cylinder; 3. Grease nozzle;

[0030] 02. Overflow valve: 4. Valve seat, 4a. Sliding chamber, 4b. Limiting groove; 5. Valve core, 5a. Stop end, 5b. Insert section, 5c. Guide rod, 5d. V-shaped groove; 6. Pressure regulating part, 6a. Guide hole; 7. Spring; 8. Ball; 9. Protective cover, 9a. Buckle; 10. Oil guide part; 11. Gasket; 12. Oil inlet; 13. Oil outlet. DETAILED DESCRIPTION

[0031] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are only descriptive and exemplary and should not be construed as limiting the protection scope of the present invention.

[0032] It should be noted that like reference numerals denote similar items in the following drawings, and thus, once an item is defined in one drawing, it may not be further defined or explained in subsequent drawings.

[0033] This embodiment mainly describes an adjustable relief valve and a grease gun applicable to a grease gun, which can improve the safety of the grease gun when in use, as follows:

[0034] like Figure 1-4 As shown, an adjustable overflow valve and a grease gun suitable for a grease gun include a grease gun body 01, on which a connecting head 1, an oil filling cylinder 2, an oil filling nozzle 3 and an overflow valve 02 are provided. The oil filling cylinder 2, the oil filling nozzle 3 and the overflow valve 02 can all be detachably installed on the connecting head 1, and the oil filling cylinder 2, the oil filling nozzle 3 and the connecting head 1 are internally interconnected. Preferably, the oil filling cylinder 2, the oil filling nozzle 3 and the overflow valve 02 can be detachably connected on the connecting head 1 through a threaded structure.

[0035] In this embodiment, the overflow valve 02 includes an oil guide part 10, a valve seat 4, a ball 8, a valve core 5, a pressure regulating part 6, a spring 7 and a protective cover 9. The oil guide part 10 is threadedly connected to one end of the valve seat 4, and the pressure regulating part 6 is threadedly connected to the other end of the valve seat 4. A sliding cavity 4a is provided in the valve seat 4. The ball 8, the valve core 5 and the spring 7 are arranged in the sliding cavity 4a. The valve core 5 is inserted into the pressure regulating part 6. The spring 7 is arranged between the valve core 5 and the pressure regulating part 6. The spring 7 elastically acts on the ball 8 to fit the oil guide part 10. The protective cover 9 is detachably buckled on the valve seat 4. The overflow valve 02 is threadedly connected to the connector 1 through the valve seat 4.

[0036] In other embodiments, the pressure regulating member 6 is provided with several rows of continuous limiting grooves 4b, the continuous limiting grooves 4b are in a wavy structure, and the valve seat 4 is provided with a limiting protrusion, which can cooperate with the limiting grooves 4b to limit the movement of the pressure regulating member 6 on the valve seat 4.

[0037] The oil guide member 10 is provided with an oil inlet 12 extending therethrough, and the valve seat 4 is provided with an oil outlet 13. The oil inlet 12 and the oil outlet 13 are connected to the sliding chamber 4a, but the ball 8 blocks the oil inlet 12 under the action of the spring 7. The oil guide member 10 is arranged so that it is easy to replace when the oil inlet 12 is blocked. Since both ends of the oil guide member 10 with the oil inlet 12 extending therethrough are hidden in the connector 1 and the valve seat 4, and are rarely exposed to the air, the blockage of the oil guide member 10 can be ignored. Therefore, in other embodiments, the oil inlet 12 can be as shown in FIG. Figure 5 or Figure 6 It is shown arranged directly on the valve seat 4 .

[0038] Preferably, the oil outlet 13 may be provided through the pressure regulating member 6 .

[0039] The valve seat 4 is provided with a limit groove 4b, and the protective cover 9 is provided with a buckle 9a, which can be movably inserted into the limit groove 4b, so that the valve seat 4 and the protective cover 9 can be detachably installed, and the setting of the protective cover 9 can cover the oil outlet 13 on the valve seat 4. When the oil outlet 13 is discharged due to pressure, it can effectively prevent gas or oil from splashing out. Preferably, the protective cover 9 can be as follows Figure 6 Not set as shown.

[0040] When the pressure in the grease gun is too high due to the blockage of the oil filling nozzle 3 and the pressure in the grease gun body 01 reaches the pressure value that can push the spring 7, the pressure in the grease gun body 01 can be applied to the ball 8 through the oil inlet 12, pushing the ball 8 and the valve core 5 to slide along the direction of the guide hole 6a, and compressing the spring 7, thereby realizing the conduction of the oil inlet 12, the sliding cavity 4a and the oil outlet 13 in the relief valve 02, and releasing the pressure in the grease gun body 01, effectively avoiding local cracks or explosions at the joints of the grease gun body 01, and improving the safety of the grease gun body 01 when in use.

[0041] like Figure 2-3 As shown, the valve core 5 is provided with a stop end 5a, an insertion section 5b and a guide rod 5c. The insertion section 5b is arranged between the stop end 5a and the guide rod 5c. The pressure regulating member 6 is provided with a guide hole 6a for the guide rod 5c to be inserted. The guide hole 6a guides the sliding direction of the valve core 5 in the sliding chamber 4a. The spring 7 is sleeved on the insertion section 5b, and the spring 7 is located between the stop end 5a and the pressure regulating member 6. By adjusting the pressure regulating member 6, the distance between the pressure regulating member 6 and the oil guide member 10 can be adjusted, that is, the elastic force of the spring 7 acting on the ball 8 through the valve core 5 can be adjusted.

[0042] In this embodiment, a V-shaped groove 5d is provided on the valve core 5, and the ball 8 is arranged in the V-shaped groove 5d. The V-shaped groove 5d and the guide rod 5c are arranged at both ends of the valve core 5. The ball 8 can be arranged independently. To prevent the ball 8 from falling, the ball 8 and the valve core 5 can be an integral structure. Preferably, the inner wall of the V-shaped groove 5d can adopt a spherical or conical structure, and the end of the oil inlet 12 located in the valve seat 4 can also be provided with a spherical or conical structure.

[0043] In order to ensure the sealing of the overflow valve 02 installed on the connecting head 1 of the grease gun body 01, a gasket 11 is provided on the valve seat 4, and the gasket 11 is clamped between the connecting head 1 and the valve seat 4.

[0044] In the description of the present utility model, it should be noted that the terms "upper", "lower", "front", "back", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model.

[0045] The above is a detailed introduction to the adjustable overflow valve and grease gun suitable for a grease gun provided by the utility model. This article uses specific examples to illustrate the principle and implementation method of the utility model. The description of the above embodiments is only used to help understand the utility model and its core ideas. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified. These improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. An adjustable relief valve suitable for a grease gun, comprising a valve seat provided with an oil inlet, a valve core slidably arranged in the valve seat, a pressure regulating member adjustably arranged on the valve seat, and a spring arranged in the valve seat and capable of elastically acting on the valve core; A sliding cavity is provided in the valve seat, and the oil inlet is connected to the sliding cavity; The valve core is slidably arranged in the sliding cavity, and one end of the valve core is acted upon by a spring to block the oil inlet; It is characterized in that A guide rod is provided at the other end of the valve core, a guide hole is provided on the pressure regulating member, the guide rod is inserted into the guide hole, and the guide hole guides the sliding direction of the valve core in the sliding cavity; The valve seat or the pressure regulating member is provided with a penetrating oil outlet, which is connected to the sliding cavity.

2. The adjustable relief valve suitable for a grease gun according to claim 1, characterized in that: The valve core is provided with an inserting section inserted into a spring and a stopping end stopped on the spring, and the inserting section is located between the stopping end and the guide rod.

3. The adjustable relief valve suitable for a grease gun according to claim 1, characterized in that: The pressure regulating member is arranged on the valve seat and is threadedly connected.

4. The adjustable relief valve suitable for a grease gun according to claim 1, characterized in that: The pressure regulating member is provided with a plurality of continuous limiting grooves, and the valve seat is provided with limiting convex parts which can cooperate with the limiting grooves.

5. The adjustable relief valve suitable for a grease gun according to claim 1, characterized in that: One end of the valve core adopts a spherical surface or a conical surface structure.

6. The adjustable relief valve suitable for a grease gun according to claim 1, characterized in that: A V-shaped groove is arranged at one end of the valve core, a ball is arranged in the V-shaped groove, and the elastic force of the spring can act on the ball to block the oil inlet.

7. The adjustable relief valve suitable for a grease gun according to claim 1, characterized in that: An oil guide member is detachably mounted on the valve core, and the oil outlet is arranged through the oil guide member.

8. The adjustable relief valve suitable for a grease gun according to claim 1, characterized in that: A protective cover is detachably mounted on the valve seat, and the protective cover covers the oil outlet.

9. The adjustable relief valve suitable for a grease gun according to claim 8, characterized in that: The valve seat is provided with a limiting groove, and the protection cover is provided with a buckle which can be movably snapped into the limiting groove.

10. Grease gun, characterized in that: It comprises a grease gun body and an adjustable overflow valve suitable for a grease gun as described in any one of claims 1 to 9 above; The grease gun body is provided with a connecting head, on which an oil filling cylinder and the valve seat are detachably mounted.

Images