Grease gun oil inlet nozzle structure and manual grease gun

Abstract

The utility model relates to a grease gun oil inlet nozzle structure and a manual grease gun, the grease gun oil inlet nozzle structure comprises a body, the body comprises an oil inlet end, an oil outlet end and an oil passing channel communicated with the oil inlet end and the oil outlet end, a connecting part is arranged on the side, close to the oil outlet end, of the body, and the connecting part is used for being connected with an oil pumping assembly; the oil passing channel is covered with a filter screen used for blocking sundries. An oil medium entering the grease gun oil inlet nozzle structure is filtered through the filter screen, and the content of impurities in oil can be reduced, so that the purity of oil conveyed into the manual grease gun from the grease gun oil inlet nozzle structure is improved, abrasion to mechanical parts in the manual grease gun can be reduced, the service life of the manual grease gun is prolonged, and the service life of the manual grease gun is prolonged. The flow path of the grease medium of the manual grease gun is optimized, the flow resistance of the grease can be reduced, and the conveying efficiency is improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of grease gun oil inlet nozzle structures, and in particular to a grease gun oil inlet nozzle structure and a manual grease gun. Background Art

[0002] A grease gun is an oiler that injects lubricating oil into a mechanical lubrication system. Through the compression of the piston and the cooperation of the one-way valve, the lubricating oil is drawn into the gun body and then squeezed out. The grease gun is equipped with an oil inlet nozzle and an oil outlet nozzle.

[0003] The existing grease gun oil inlet nozzle has no filtering structure. The oil inlet nozzle extends into the grease, and the grease enters the pump body directly through the oil inlet through the action of the piston. Due to the complex actual working environment, metal impurities or other particulate matter are sometimes inevitably mixed into the grease. Once these impurities are drawn into the one-way valve and the piston, the gun body may be stuck or damaged. Alternatively, the impurities may be added to the electric delivery pump of the mechanical lubrication system, causing damage to the lubrication system and malfunctioning of the system. In order to solve this problem, an oil inlet nozzle mechanism that can filter impurities is urgently needed. Utility Model Content

[0004] In order to overcome the problems existing in the related art, the present disclosure provides a grease gun oil inlet nozzle structure and a manual grease gun.

[0005] According to a first aspect of an embodiment of the present disclosure, a grease gun oil inlet nozzle structure is provided, comprising: a main body, the main body comprising an oil inlet end, an oil outlet end, and an oil passage connecting the oil inlet end and the oil outlet end, a connecting portion being provided on a side of the main body close to the oil outlet end, the connecting portion being used to connect to an oil pump assembly; the oil passage cover being provided with a filter screen for blocking debris.

[0006] In some embodiments, the filter screen cover is arranged in the oil flow channel, and the filter screen is raised to form an oil flow bulge, so that the surface area of the filter screen is larger than the cross-sectional area of the oil flow channel near the oil inlet end, and a gap is formed between the oil flow bulge and the oil flow channel.

[0007] In some embodiments, the oil-passing protrusion is made of metal material, and the protruding direction of the oil-passing protrusion is toward the oil inlet end.

[0008] In some embodiments, the oil-passing protrusion is cylindrical, conical, spherical or prismatic.

[0009] In some embodiments, the filter screen further includes a fixed edge, a mounting groove is provided in the oil passage, and the fixed edge is fixed in the mounting groove by a retaining spring.

[0010] In some embodiments, an oil inlet ball valve is provided in the oil passage near the oil outlet end.

[0011] In some embodiments, one or more oil inlet holes are arranged along the circumference of the body near the oil inlet end, and the one or more oil inlet holes are connected to the gap.

[0012] In some embodiments, the connecting portion is a thread.

[0013] In some embodiments, it further includes: an extension section connected to the connecting portion, the extension section being provided with a fixing pin for preventing the oil inlet ball valve from being separated from the oil passage.

[0014] According to a second aspect of the embodiments of the present disclosure, a manual grease gun is further provided, comprising: a grease gun oil inlet nozzle structure as described in any of the above embodiments, and a pump body, the grease gun oil inlet nozzle structure being threadedly connected to the pump body, the pump body including an oil outlet ball valve disposed at one end proximal to the grease gun oil inlet nozzle structure, a piston rod disposed at an end of the oil outlet ball valve distal to the grease gun oil inlet nozzle structure, a spring disposed within the piston rod, and a gasket disposed between the piston rod and the inner surface of the pump body; a movable handle disposed at the end of the pump body distal to the grease gun oil inlet nozzle structure, through which the output of the pump body is output to the outside; and a fixed handle disposed between the movable handle and the piston rod and on the outer surface of the pump body.

[0015] The technical solutions provided by the embodiments of the present disclosure may have the following beneficial effects:

[0016] By filtering the oil medium entering the grease gun oil inlet nozzle structure through the filter mesh, the content of impurities in the oil can be reduced, thereby improving the purity of the oil delivered from the grease gun oil inlet nozzle structure to the grease gun, reducing the wear on the internal mechanical parts of the grease gun, extending the service life of the grease gun, optimizing the flow path of the grease gun oil medium, reducing the flow resistance of the oil, and improving the delivery efficiency.

[0017] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0019] Figure 1 It is a structural schematic diagram of a grease gun oil inlet nozzle structure from a first perspective according to an exemplary embodiment.

[0020] Figure 2 1 is a schematic structural diagram of a grease gun oil inlet nozzle structure from a second perspective according to an exemplary embodiment.

[0021] Figure 3 It is a structural schematic diagram of a grease gun oil inlet nozzle structure shown from a first cross-sectional perspective according to an exemplary embodiment.

[0022] Figure 4 It is a structural schematic diagram of a grease gun oil inlet nozzle structure shown from a second cross-sectional perspective according to an exemplary embodiment.

[0023] Figure 5 The figure is a schematic structural diagram of a manual grease gun according to an exemplary embodiment.

[0024] Figure 6 yes Figure 5 Schematic diagram of the enlarged structure of part A in FIG.

[0025] Figure 7 3 is a schematic structural diagram of a grease gun oil inlet nozzle structure from a third cross-sectional perspective according to an exemplary embodiment.

[0026] Figure 8 3 is a schematic structural diagram of a filter screen from a first perspective according to an exemplary embodiment.

[0027] Figure 9 FIG. 1 is a schematic structural diagram of a filter from a second perspective according to an exemplary embodiment.

[0028] Reference numerals:

[0029] Grease gun oil inlet nozzle structure 1;

[0030] Oil inlet end 21; oil inlet hole 22;

[0031] Oil outlet 3;

[0032] Filter 4; first part 41; second part 42; retaining spring 43; fixing edge 44;

[0033] Body 5; mounting groove 51; connecting portion 52; oil passage 53; gap 54; oil inlet ball valve 55; extension section 56; fixing pin 57;

[0034] Manual grease gun 100; pump body 110; oil outlet ball valve 120; piston rod 130; spring 140; washer 150; movable handle 160; fixed handle 170; pump oil outlet 180. DETAILED DESCRIPTION

[0035] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all possible embodiments consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

[0036] In the prior art, a grease gun inserts an oil inlet nozzle into the grease, and the piston forces the grease to flow directly into the pump body through the oil inlet. However, the inventors of this invention discovered that due to the complex working environment, metallic impurities or other particulate matter may sometimes be mixed into the grease. Once these impurities are drawn into the one-way valve and piston, they can cause the gun to become stuck or damaged. Alternatively, they can be injected into the electric delivery pump of the mechanical lubrication system, damaging the lubrication system and rendering it inoperable. To address this issue, a grease inlet nozzle mechanism capable of filtering out impurities is urgently needed.

[0037] To address the aforementioned technical issues, a grease gun nozzle structure 1 is provided according to one embodiment of the present disclosure. It is understood that the grease gun nozzle structure 1 described herein can be applied to a manual grease gun 100. Manual grease guns 100 are used to transfer grease from one location to another. It should be understood that the present embodiment does not limit the specific technology or device form employed by manual grease guns 100.

[0038] In some embodiments, as Figure 1-2 As shown, the grease gun oil inlet nozzle structure 1 includes: a main body 5, the main body 5 includes an oil inlet end 21, an oil outlet end 3, and an oil passage 53 connecting the oil inlet end 21 and the oil outlet end 3, and a connecting portion 52 is provided on the side of the main body 5 close to the oil outlet end 3, and the connecting portion 52 is used to connect to the oil pump assembly; the oil passage 53 is covered with a filter screen 4 for blocking debris.

[0039] It is understood that the body 5 in this embodiment may be an external protective structure for the grease gun inlet nozzle structure 1, used to accommodate and protect the components within the nozzle. The body 5 may be a cylindrical, rectangular, or other tubular, box-like, or other shaped structure. The oil inlet end 21 and the oil outlet end 3 may be two opposing ends of the body 5, wherein the oil inlet end 21 may be opposite the oil outlet end 3.

[0040] In one possible case, the oil inlet end 21 may be a conical inlet for guiding the fluid into the grease gun oil inlet nozzle structure 1. In another possible case, the oil inlet end 21 may also be a planar inlet for connecting to an oil tank or other fluid source.

[0041] In one possible scenario, the oil outlet 3 may be a conical outlet for delivering fluid to an oil delivery device. In another possible scenario, the oil outlet 3 may be a planar outlet for connecting to an oil delivery device or other fluid receiving equipment. In another possible scenario, the oil outlet 3 may be an outlet with a regulating valve for controlling the flow and pressure of the fluid.

[0042] It can be understood that the oil passage 53 can be a passage through which the oil medium flows in the grease gun oil inlet nozzle structure 1, and the oil passage 53 can connect the oil inlet end 21 and the oil outlet end 3, allowing the oil medium to flow smoothly.

[0043] It can be understood that the connecting part 52 in this embodiment can be the part that connects the grease gun oil inlet nozzle structure 1 and the oil pump assembly. The connecting part 52 can firmly connect the grease gun oil inlet nozzle structure 1 and the oil pump assembly together to facilitate the transportation of oil medium from the grease gun oil inlet nozzle structure 1 to the inside of the oil pump assembly.

[0044] For example, in one possible case of this embodiment, if Figure 1-4 As shown, the connecting portion 52 can be a thread. The threaded connecting portion 52 can firmly connect the grease gun oil inlet nozzle structure 1 and the oil pump assembly through the rotation and tightening action of the thread, ensuring the sealing and stability of the oil during the delivery process.

[0045] In another possible case of this embodiment, the connecting portion 52 may also be a quick connection interface. The quick connection interface can quickly and conveniently connect the grease gun oil inlet nozzle structure 1 to the oil pump assembly by snapping or plugging, which is convenient for rapid replacement and maintenance.

[0046] In another possible case of this embodiment, the connection portion 52 can also be a flange connection. The flange connection can connect the grease gun oil inlet nozzle structure 1 to the oil pump assembly by fastening the flange plate. The flange connection is suitable for situations requiring higher sealing performance and load-bearing capacity.

[0047] It is understandable that the oil medium entering the grease gun oil inlet nozzle structure 1 can be an oil mixture containing impurities, and the impurities can be solids, particles, lint, or other undesirable components in the oil medium. For example, the oil medium entering the grease gun oil inlet nozzle structure 1 can be crude oil, diesel, gasoline, lubricating oil, coolant, hydraulic oil, etc., but the present disclosure does not limit the specific type of oil medium entering the grease gun oil inlet nozzle structure 1. That is, those skilled in the art can adjust the type according to actual circumstances. The above situation is only an example of the types of oil medium that can enter the grease gun oil inlet nozzle structure 1 in the present disclosure, and is not limited to the situation described in the above embodiment.

[0048] It is understood that the grease gun inlet nozzle structure 1 in this embodiment can be installed in a manual grease gun 100 and can be located at the end or a specific position of the manual grease gun 100 to block debris in the oil to be sucked in through the filter 4. The filter 4 can be used to reduce debris in the oil medium entering the grease gun inlet nozzle structure 1, thereby reducing the debris content in the oil medium flowing out of the grease gun inlet nozzle structure 1.

[0049] It can be understood that the oil passage 53 is covered with a filter 4 for blocking debris, and the filter 4 can be placed inside or outside the oil passage 53 to cover or surround the oil passage 53, so that the oil medium can be filtered inside the oil passage 53 before or after entering the oil passage 53.

[0050] The filter screen 4 can be covered in the oil passage 53 by, for example, a retaining spring 43, welding, threaded connection, snap fixation, bonding, threaded sleeve or flange connection, and the like.

[0051] It is understood that the filter screen 4 can be disposed at various locations within or outside the oil passage 53. For example, in one possible embodiment, the filter screen 4 can be disposed at the entrance of the oil passage 53, that is, immediately adjacent to the oil inlet end 21. This arrangement ensures that the oil medium is filtered at an early stage of entering the oil passage 53, thereby protecting subsequent oil pump components from damage by impurities.

[0052] In another possible case, the filter screen 4 is arranged in the middle position of the oil passage 53. The arrangement in this possible case can continuously filter the oil medium during its flow, ensuring the cleanliness of the oil medium during the entire transportation process.

[0053] In another possible case, the filter screen 4 is installed at the outlet of the oil passage 53, that is, near the oil outlet 3. In this possible arrangement, the oil medium can be finally filtered before leaving the grease gun oil inlet nozzle structure 1, ensuring that the output oil medium meets the required cleanliness standards.

[0054] In other possible cases, the filter screen 4 can also be installed outside the oil passage 53 and can be relatively fixed to the body 5 near the oil inlet end 3 by, for example, threaded connection, snap fastening, bonding, threaded sleeve or flange connection. In this possible arrangement, the oil medium can be filtered before entering the oil passage 53, thereby protecting subsequent oil pump components from damage by impurities, and also preventing the oil passage 53 from being clogged by filtered debris.

[0055] It is understandable that the filter 4 can be used to reduce the amount of impurities in the oil medium entering the grease gun oil inlet nozzle structure 1, thereby reducing the amount of impurities in the oil flowing out of the grease gun oil inlet nozzle structure 1.

[0056] In some embodiments, the filter mesh 4 can be formed into a mesh structure by metal, plastic, fiber, ceramic, glass, composite materials, etc. It should be noted that the above materials can be selected by technical personnel in this field according to different requirements such as filtration accuracy, temperature resistance, pressure resistance, and corrosion resistance.

[0057] For example, the metal filter 4 can have high strength and corrosion resistance, and is suitable for high temperature and high pressure environments; the plastic filter 4 can have good chemical stability and is suitable for filtering corrosive media; the fiber filter 4 can be suitable for fine filtration and can capture tiny debris; the ceramic and glass filter 4 can have good heat resistance and corrosion resistance; the composite filter 4 combines the advantages of multiple materials and is suitable for special working conditions.

[0058] However, the present disclosure is not limited to this. In other embodiments, the filter 4 can also be a filter 4 that can adsorb impurities using adsorption materials (such as activated carbon, zeolite, silica gel, etc.), thereby reducing the content of impurities in the oil medium entering the grease gun oil inlet nozzle structure 1.

[0059] In other embodiments, the filter 4 can also be a filter 4 obtained by adding a flocculant (such as a polymer, aluminum salt, iron salt, etc.) to the adsorption material, so that the impurities in the oil medium entering the grease gun oil inlet nozzle structure 1 are aggregated into larger flocs, and then the adsorption material of the filter 4 is removed.

[0060] In other embodiments, the filter 4 can also be a filter 4 formed by spraying using a specific chemical solvent (methanol, ethanol, isopropanol, acetone, methyl ethyl ketone, ethyl acetate, methyl methylpropionate, carbon tetrachloride, trichloroethylene, etc.) or a dispersant (polyoxyethylene ether, sulfonate, sulfate, quaternary ammonium salt, polyacrylate, polyvinyl alcohol, silicone oil, silanol, zinc stearate, calcium stearate, etc.). The filter 4 in this embodiment can dissolve or disperse impurities in the oil medium entering the grease gun oil inlet nozzle structure 1, thereby reducing the content of impurities in the oil medium entering the grease gun oil inlet nozzle structure 1.

[0061] In other embodiments, the filter 4 can also be heated. By heating the oil medium entering the grease gun inlet nozzle structure 1, certain impurities can be easily separated from the medium due to thermal decomposition or phase change. The heat treatment can also help reduce the viscosity of the oil medium (oil mixture) entering the grease gun inlet nozzle structure 1, making it easier to separate impurities.

[0062] In other embodiments, the filter 4 can also utilize fluid dynamics principles to design a specific flow path and velocity profile, allowing debris to be deposited or directed to a specific collection area during the flow process. For example, in one possible scenario, a deceleration zone can be first provided within the flow path of the filter 4, such as by increasing the channel cross-sectional area or installing a flow-blocking element to reduce the flow velocity, thereby utilizing the inertia of debris to encourage its deposition. Next, a curved channel can be designed to utilize centrifugal force to push debris outward, directing it to the collection area. Furthermore, inclined plates or inclined tubes can be incorporated within the filter 4 to generate a transverse velocity component during fluid flow, causing debris to settle along the inclined surface under the influence of gravity. Alternatively, a multi-stage mesh filtration path can be designed, with each stage separating debris of different sizes or densities, gradually directing them to the collection area. Velocity gradients can also be created, utilizing differences in inertia of debris at points of velocity change for separation. Streamline design, such as using guide plates or walls, can be used to direct debris to specific collection areas. Turbulence can be reduced in areas where debris is desired to be deposited, preventing resuspension of debris. Through these optimization measures, the filter screen 4 can more effectively separate and collect debris.

[0063] It should be pointed out that the present disclosure does not limit the specific type of the filter 4, that is, those skilled in the art can adjust its type according to actual conditions. The above situation is only an exemplary explanation of the types of the filter 4 in the present disclosure, but is not limited to the situations described in the above embodiments.

[0064] It is understood that in any of the above-described embodiments, as the oil medium entering the grease gun inlet nozzle structure 1 flows from the oil inlet end 21 to the oil outlet end 3, it may be converted by the filter 4 into an oil medium after debris has been filtered out by the filter 4. The debris content of the oil medium entering the grease gun inlet nozzle structure 1 may be a first content, and the debris content of the oil medium after debris has been filtered out by the filter 4 may be a second content, with the first content being greater than the second content. For example, in some possible scenarios, the debris content of the oil medium entering the grease gun inlet nozzle structure 1 may be 20%, 10%, 5%, 3%, etc., and the debris content of the oil medium after debris has been filtered out by the filter 4 may be 2%, 1%, 0.5%, 0%, etc. However, the present disclosure does not limit the specific values of the first and second contents, or the specific difference between them. Those skilled in the art may adjust their types based on actual circumstances. The above examples are merely illustrative of the situations in which specific values of the first and second contents, or the specific difference between them, may exist, and are not limited to those described in the above-described embodiments. Those skilled in the art should understand that, under the same conditions, the first content can be any value greater than the second content and greater than 0, and the second content can also be any value less than the first content or equal to 0.

[0065] By filtering the oil medium entering the grease gun oil inlet nozzle structure 1 through the filter 4 in this embodiment, the content of impurities in the oil can be reduced, thereby improving the purity of the oil delivered from the grease gun oil inlet nozzle structure 1 to the grease gun 100, reducing the wear on the internal mechanical parts of the grease gun 100, extending the service life of the grease gun 100, optimizing the flow path of the oil medium in the grease gun 100, reducing the flow resistance of the oil, and improving the delivery efficiency.

[0066] In some embodiments, as Figure 1 or Figure 2 or Figure 4 or Figure 7 As shown, the filter screen 4 can be covered in the oil passage 53, and the filter screen 4 can be raised to form an oil passage convex portion, so that the surface area of the filter screen 4 is larger than the cross-sectional area of the oil passage 53 near the oil inlet end 21, and a gap 54 is formed between the oil passage convex portion and the oil passage 53.

[0067] It is understood that the filter 4 covering the oil passage 53 may be placed or fixed within the oil passage 53, covering or surrounding a portion of the oil passage 53 to facilitate filtering impurities in the oil. The oil-passing protrusion may be a raised portion formed by the filter 4 within the oil passage 53, having a surface area greater than the cross-sectional area of the passage, thereby increasing the filtering area.

[0068] For example, in one possible case, the filter 4 can be implemented by a detachable filter cover 4, which covers a part of the oil passage 53 and can be fixed by a snap or threaded connection, and the middle part of the filter 4 can be constructed as an oil-passing convex part, with both sides gradually lowering to form a dome-like structure, and the surface area of the filter 4 is designed to be 1.5 times the cross-sectional area of the oil passage 53, and the gap 54 is 1-2 mm to reduce pressure loss.

[0069] In other possible cases, the filter 4 can also be fixed in the oil passage 53 by a filter basket or frame. The filter material 4 is filled in the basket or frame, and a plurality of conical or hemispherical protrusions are used as part of the filter 4. These protrusions can be oil-passing protrusions and can be distributed along the axial direction of the oil passage 53. The surface area of the filter 4 can be twice or more the cross-sectional area of the oil passage 53. The size of the gap 54 can be optimized according to the viscosity and flow rate of the oil. This disclosure is not limited thereto.

[0070] It can be understood that, by providing the oil-passing protrusion in this embodiment and forming a gap 54 between the oil-passing protrusion and the oil-passing channel 53, it is possible to ensure that the cross-sectional area of the oil medium entering the grease gun oil inlet nozzle structure 1 and flowing through the filter 4 is larger than the cross-sectional area of the oil medium flowing through the oil outlet end 3 after the impurities are filtered by the filter 4.

[0071] It is understood that, in the flow path of the grease gun inlet nozzle structure 1, the cross-sectional area of the oil medium (e.g., an oil mixture containing impurities) entering the grease gun inlet nozzle structure 1 as it passes through the filter 4 is greater than the cross-sectional area of the processed oil medium after impurities have been filtered out by the filter 4 as it flows through the oil outlet 3. In other words, in the grease gun inlet nozzle structure 1, the cross-sectional area of the flow can be the cross-sectional area of the fluid (here, the oil medium entering the grease gun inlet nozzle structure 1 or the oil medium after impurities have been filtered out by the filter 4) as it passes through a specific portion of the grease gun inlet nozzle structure 1 (e.g., the filter 4 or the oil outlet 3).

[0072] For example, the cross-sectional area of the oil medium entering the grease gun inlet nozzle structure 1 as it passes through the filter screen 4 of the grease gun inlet nozzle structure 1 determines the flow rate and flow rate of the fluid through the filter screen 4. In this embodiment, the cross-sectional area is larger, and the flow rate of the fluid passing through the filter screen 4 is relatively low, which helps to improve the separation efficiency of the filter screen 4 because the solid particles have more time to contact the filter screen 4 and be separated.

[0073] It should be noted that the impurity content of the oil medium after being filtered by the filter 4 of this embodiment is reduced. The oil medium has a smaller flow cross-sectional area when passing through the oil outlet 3 of the grease gun inlet nozzle structure 1, resulting in a relatively high flow rate. This helps to quickly transport the treated oil while maintaining a certain pressure to maintain the normal operation of the oil delivery system.

[0074] In this embodiment, the raised structure of the filter screen 4 and the gap 54 left between the filter screen 4 and the oil passage 53 can increase the filtration area, thereby improving the ability to capture impurities. Specifically, the raised structure of the filter screen 4 can adjust the cross-sectional area of the oil medium entering the grease gun oil inlet nozzle structure 1 through the filter screen 4, achieving more effective solid particle separation. Based on the principles of fluid dynamics, by increasing the cross-sectional area of the filter screen 4, the flow rate of the oil medium entering the grease gun oil inlet nozzle structure 1 is reduced, thereby increasing the contact time between impurities and the filter screen 4 and improving separation efficiency. At the same time, compared with the cross-sectional area of the oil outlet end 3, this design helps to control the pressure loss of the system and optimize the flow state. The gap 54 between the filter screen 4 and the oil passage 53 can also reduce the pressure loss when the oil flows through, thereby also improving the efficiency of the pump.

[0075] In some embodiments, as Figure 1 or Figure 2 or Figure 4 or Figure 7As shown, the cross-sectional area of the oil medium entering the grease gun oil inlet nozzle structure 1 and flowing through the oil inlet end 21 is larger than the cross-sectional area of the oil medium flowing through the oil outlet end 3 after the impurities are filtered out by the filter 4; and / or, the cross-sectional area of the oil medium entering the grease gun oil inlet nozzle structure 1 and flowing through the oil inlet end 21 is smaller than, greater than, or equal to the cross-sectional area of the oil medium entering the grease gun oil inlet nozzle structure 1 and flowing through the filter 4.

[0076] The term "and / or" refers to the presence of more than one condition:

[0077] In the first case, the cross-sectional area of the oil medium entering the grease gun oil inlet nozzle structure 1 flowing through the oil inlet end 21 is larger than the cross-sectional area of the oil medium flowing through the oil outlet end 3 after the oil medium has filtered out impurities through the filter 4. In this case, the flow rate can be reduced before entering the filter 4, which helps to settle and separate impurities and improve separation efficiency.

[0078] In the second case, the cross-sectional area of the oil medium entering the grease gun oil inlet nozzle structure 1 flowing through the oil inlet end 21 is smaller than the cross-sectional area of the oil medium entering the grease gun oil inlet nozzle structure 1 flowing through the filter 4. In this case, a slower flow can be formed inside the filter 4, thereby improving separation efficiency while maintaining a high flow rate and reducing pressure loss.

[0079] In the third case, the cross-sectional area of the oil medium entering the grease gun oil inlet nozzle structure 1 flowing through the oil inlet end 21 is larger than the cross-sectional area of the oil medium entering the grease gun oil inlet nozzle structure 1 flowing through the filter 4. In this case, the flow rate can be reduced before entering the filter 4, which helps to settle and separate impurities while maintaining a high flow rate and reducing pressure loss.

[0080] In the fourth case, the cross-sectional area of the oil medium entering the grease gun oil inlet nozzle structure 1 flowing through the oil inlet end 21 is equal to the cross-sectional area of the oil medium entering the grease gun oil inlet nozzle structure 1 flowing through the filter 4. In this case, the continuity of the flow rate can be maintained, the pressure loss can be reduced, and a high flow rate can be maintained to reduce the pressure loss.

[0081] In the fifth scenario, the cross-sectional area of the oil medium entering the grease gun inlet nozzle structure 1 flowing through the oil inlet end 21 is larger than the cross-sectional area of the oil medium flowing through the oil outlet end 3 after the oil medium has filtered out debris through the filter 4. Furthermore, the cross-sectional area of the oil medium entering the grease gun inlet nozzle structure 1 flowing through the oil inlet end 21 is smaller than the cross-sectional area of the oil medium entering the grease gun inlet nozzle structure 1 flowing through the filter 4. This scenario improves the deposition efficiency of debris at the oil inlet end 21, reduces the flow rate of debris at the oil outlet end 3, and thus reduces the resuspension of debris.

[0082] In the sixth case, the cross-sectional area of the oil medium entering the grease gun oil inlet nozzle structure 1 flowing through the oil inlet end 21 is larger than the cross-sectional area of the oil medium flowing through the oil outlet end 3 after the debris is filtered by the filter 4. In addition, the cross-sectional area of the oil medium entering the grease gun oil inlet nozzle structure 1 flowing through the oil inlet end 21 is larger than the cross-sectional area of the oil medium entering the grease gun oil inlet nozzle structure 1 flowing through the filter 4. In this case, the oil medium entering the grease gun oil inlet nozzle structure 1 has more space to reduce its flow rate before entering the filter 4, thereby facilitating the deposition and separation of debris. At the same time, because the cross-sectional area of the oil inlet end 21 is larger than the cross-sectional area of the filter 4, the fluid is accelerated when entering the filter 4, which helps to form a faster flow in the filter 4, which may help to further separate debris and reduce the risk of clogging in the filter 4.

[0083] In the seventh case, the cross-sectional area of the oil medium entering the grease gun oil inlet nozzle structure 1 flowing through the oil inlet end 21 is larger than the cross-sectional area of the oil medium flowing through the oil outlet end 3 after the impurities are filtered out by the filter 4. Furthermore, the cross-sectional area of the oil medium entering the grease gun oil inlet nozzle structure 1 flowing through the oil inlet end 21 is equal to the cross-sectional area of the oil medium entering the grease gun oil inlet nozzle structure 1 flowing through the filter 4. In this case, it can be ensured that the flow rate of the oil medium entering the grease gun oil inlet nozzle structure 1 will not change significantly when entering the filter 4, because the cross-sectional areas of the oil inlet end 21 and the filter 4 are the same. This helps maintain the stability of the fluid flow, reduces pressure loss, and may reduce the impact on the filter 4. At the same time, because the cross-sectional area of the oil inlet end 21 is larger than that of the oil outlet end 3, the fluid will experience a deceleration process when flowing out, which may help further settle and separate impurities.

[0084] In some embodiments, the oil-passing protrusion is made of metal material, such as Figure 1 or Figure 2 or Figure 4 or Figure 7 As shown, the protruding direction of the oil-passing protrusion is toward the oil inlet end 21.

[0085] It is understood that the metal material of the oil drain protrusion can affect the durability and filtration efficiency of the filter 4. In one possible embodiment, the oil drain protrusion can be made of stainless steel, which has excellent corrosion resistance and high strength, making it suitable for use in a variety of oil environments. However, the present disclosure is not limited to this embodiment. In other embodiments, the oil drain protrusion can also be supported by lightweight metals such as copper or aluminum, especially in applications with special weight requirements.

[0086] It is understood that the oil-passing projection can be directed toward the oil inlet end 21 by manufacturing the raised portion of the filter screen 4 through a metal stamping or stretching process, which can effectively form the desired shape and size. However, the present disclosure is not limited thereto, and a plurality of metal mesh sheets can also be welded or bonded to form a raised structure with a specific orientation.

[0087] In this embodiment, the convex portion of the filter screen 4 made of metal material has high mechanical strength and corrosion resistance, and can withstand the pressure and impact caused by the flow of oil. The design of the protrusion direction toward the oil inlet end 21 helps to guide the flow of oil, reduce the turbulence of the oil on the filter screen 4, and thus reduce pressure loss.

[0088] In some embodiments, the oil-passing protrusion may be cylindrical, conical, spherical, or prism-shaped.

[0089] It is understandable that if Figure 1 or Figure 2 or Figure 4 or Figure 7 As shown, the cylindrical shape of the filter screen 4 is similar to a cylindrical projection with a uniform diameter and height. The cylindrical projection can be manufactured by, for example, curling a metal material and welding the two ends. The cylindrical projection can provide a stable oil flow and is suitable for applications requiring a uniform flow rate distribution.

[0090] The tapered shape can be a projection of the filter screen 4 that resembles a cone, with a smaller diameter at the top and a larger diameter at the bottom. This tapered projection can be manufactured, for example, by gradually reducing the diameter of a metal material and then welding it. This tapered projection can accelerate the flow of oil and is suitable for applications requiring increased oil flow rate.

[0091] The spherical shape can be that the shape of the convex portion of the filter mesh 4 is similar to a sphere, with a uniform radius, and the spherical convex portion can be manufactured by, for example, welding a metal material into a spherical shape. The spherical convex portion can provide the largest filtration area and can be suitable for applications requiring high filtration efficiency.

[0092] The prism-shaped projection of the filter screen 4 may be shaped like a prism, having multiple flat surfaces and right-angled edges. The prism-shaped projection can be manufactured by, for example, cutting a metal material into a prism shape and welding it. The prismatic projection can provide specific flow characteristics and can be suitable for applications requiring a specific oil flow pattern.

[0093] In this embodiment, different shapes of the oil-passing protrusions can influence the flow characteristics of the oil. For example, a cylindrical shape can provide a uniform flow rate distribution, while a conical shape can accelerate the flow of the oil. Specific shapes can increase the filtration area and improve filtration efficiency. For example, a spherical or prismatic shape can provide more surface area for capturing impurities.

[0094] In some embodiments, as Figure 8-9 As shown, the filter screen 4 further includes a fixed edge 44, such as Figure 3 As shown, a mounting groove 51 is provided in the oil passage 53. Figure 4 As shown, the fixing edge 44 is fixed in the mounting groove 51 by a clamping spring 43 .

[0095] It is understood that the fixing edge 44 can be a portion of the filter screen 4, configured to cooperate with the mounting groove 51 to secure the filter screen 4 in place within the oil passage 53. In some embodiments, the fixing edge 44 can be configured as one or more edge portions of the filter screen 4, having a certain thickness and strength to facilitate cooperation with the mounting groove 51. In other embodiments, the fixing edge 44 can also include one or more protrusions or grooves to provide a better fit with the retaining spring 43.

[0096] It is understood that the mounting groove 51 can be a specially designed structure within the oil passage 53 for receiving and cooperating with the fixing edge 44 to secure the filter 4. The mounting groove 51 can be configured as one or more recessed portions on the inner wall of the oil passage 53, matching the shape and size of the fixing edge 44, and the position and number of the mounting grooves 51 can be designed according to the size and shape of the filter 4.

[0097] It is understood that the retaining spring 43 may be an elastic member used to press the fixing edge 44 tightly against the mounting groove 51 to achieve an interference fit or snap fit with the mounting groove 51. An interference fit is a structural fit in which one of two mating parts is slightly larger than the other, generating a certain amount of pressure when the two are assembled, thereby achieving a tight fit.

[0098] In this embodiment, the interference fit or snap connection between the retaining spring 43 and the mounting groove 51 can ensure that the filter screen 4 is firmly fixed in the main body 5 to prevent displacement under the action of fluid pressure, thereby improving the stability and durability of the entire grease gun oil inlet nozzle structure 1, and the interference fit can also reduce or eliminate the gap between the filter screen 4 and the mounting groove 51, thereby improving the sealing performance of the grease gun oil inlet nozzle structure 1 and preventing fluid leakage. Through the interference fit, the eddy current and disturbance of the fluid between the filter screen 4 and the oil passage 53 can be reduced, thereby reducing energy loss and optimizing the fluid flow path.

[0099] In some embodiments, as Figure 6-7 As shown, an oil inlet ball valve 55 may be provided in the oil passage 53 on one side close to the oil outlet end 3 .

[0100] It is understood that the oil inlet ball valve 55 can be used to control the flow direction of the fluid in the pipeline and prevent the fluid from flowing back into the valve. The oil inlet ball valve 55 can be set in the oil passage 53 near the oil outlet end 3 to control the flow direction of the oil.

[0101] The oil inlet ball valve 55 can be designed as a one-way valve, allowing oil to flow only toward the oil outlet 3 and closing when the oil pump assembly stops working to prevent oil backflow. However, the present disclosure is not limited to this. A spring-loaded oil inlet ball valve 55 can also be used, utilizing the elastic force of the spring 140 to control the opening and closing of the valve. Alternatively, a pressure-differential-driven oil inlet ball valve 55 can be used, automatically closing when the pressure generated by the oil pump assembly drops to a certain level. It should be noted that the oil inlet ball valve 55 can be installed in the oil passage 53 via a threaded connection, a flange connection, or other suitable connection method.

[0102] In this embodiment, the setting of the oil inlet ball valve 55 can prevent the oil from flowing back to the oil inlet end 21 when the oil pump assembly stops working or the pressure is reduced, thereby maintaining the pressure of the system stable. The oil inlet ball valve 55 can also quickly respond to the start and stop of the oil pump assembly, reduce the lag phenomenon of oil flow, and improve the response speed of the entire oil circuit system. It can be understood by those skilled in the art that when the oil pump assembly stops working, the oil inlet ball valve 55 can reduce the impact and damage to the oil pump assembly caused by the backflow of oil.

[0103] In some embodiments, as Figure 1 or Figure 2 or Figure 3 or Figure 4 As shown, one or more oil inlet holes 22 are arranged along the circumferential direction on one side of the body 5 close to the oil inlet end 21 , and the one or more oil inlet holes 22 are connected to the gap 54 .

[0104] It is understandable that when there are multiple oil inlet holes 22, the multiple oil inlet holes 22 can be arranged at intervals or equal intervals in the oil passage 53 and connected to the gap 54, so that the oil begins to contact the filter 4 when entering the oil passage 53.

[0105] In one possible scenario, the oil inlet end 21 faces downward, and one or more oil inlet holes 22 face left or right. In this case, the fluid can flow vertically when entering the nozzle, helping to reduce horizontal eddies and turbulence. Furthermore, when the oil inlet end 21 is blocked, the oil inlet holes 22 can continue to flow oil.

[0106] In this embodiment, when the oil inlet end 21 is blocked by an object such as the bottom of the oil tank, the oil inlet hole 22 can continue to supply oil, ensuring the continuity of the oil supply and avoiding the interruption of the oil supply due to the obstruction of one of the sub-ports. In addition, the oil inlet hole 22 is arranged in the circumference of the oil inlet end 21, and the orientation is different from that of the oil inlet end 21. This can achieve flow distribution control, so that the fluid can be more evenly distributed when entering the grease gun oil inlet nozzle structure 1. The oil inlet design in different directions helps to reduce the eddy currents and turbulence of the fluid when entering the nozzle, thereby reducing energy loss and fluid disturbance. By optimizing the flow path of the fluid entering the nozzle, the separation effect of debris can be improved and the separation efficiency can be increased.

[0107] In some embodiments, as Figure 1 or Figure 2 As shown, the filter screen 4 may include a second portion 41 and a second portion 42 . The second portion 41 may be opposite to the oil inlet end 21 , and the second portion 42 may be opposite to the oil inlet hole 22 .

[0108] The second portion 41 and the second portion 42 in this embodiment may be two different processing areas in the filter 4 , which may be opposite to the oil inlet end 21 and the oil inlet hole 22 , respectively, and are used to process the fluid flowing through these sub-ports.

[0109] For example, the second portion 41 is opposite the oil inlet 21, and the second portion 42 is opposite the oil inlet hole 22. This allows the fluid passing through the oil inlet 21 or the oil inlet hole 22 to react with the filter 4 in a shorter time and distance, resulting in faster processing speed and higher processing efficiency. Because this relative positioning structure reduces the distance the fluid flows before entering the filter 4, it reduces energy loss and fluid disturbance during the flow process. In addition, the structure of this embodiment can also improve the separation of debris, because the fluid contacts the filter 4 in a shorter time, which helps to improve the capture and separation efficiency of debris.

[0110] In some embodiments, as Figure 2 As shown, at least part of the second portion 41 of the filter 4 can be spaced apart from the oil inlet end 21, and / or, as shown Figure 2 As shown, at least a portion of the extended surface of the second portion 41 of the filter screen 4 may pass through the oil inlet hole 22 .

[0111] It is understood that at least a portion of the second portion 41 of the filter screen 4 can be spaced apart from the oil inlet end 21, leaving a certain space between the second portion 41 and the oil inlet end 21 so that the fluid has a certain flow distance before entering the second portion 41. This may facilitate the sedimentation or reaction of impurities, and can also prevent the oil inlet end 21 from being clogged and affecting the efficiency of the second portion 41 of the filter screen 4. The term "at least a portion" may refer to a portion or all of the second portion 41 of the filter screen 4. In other words, "at least a portion" may mean that at least a portion of the second portion 41 of the filter screen 4 is spaced apart from the oil inlet end 21, or at least a portion extends to the oil inlet hole 22. This may include a space between the entire second portion 41 and the oil inlet end 21, a space between a portion of the second portion 41 and the oil inlet end 21, or a portion of the second portion 41 extending to the oil inlet hole 22.

[0112] The extended surface of at least part of the second portion 41 of the filter 4 may pass through the oil inlet hole 22. The extended surface of one or more surfaces of at least part of the second portion 41 of the filter 4 may extend to the oil inlet hole 22. The extended surface may be the plane where at least part of the surface of the second portion 41 of the filter 4 is located. This plane may extend infinitely. The extended portion may not exist, but it satisfies the coplanar condition with at least part of the surface of the filter 4. For example, Figure 4 As shown, the extended surface at least partially passes through the oil inlet hole 22, so that the oil medium entering the grease gun oil inlet nozzle structure 1 through the oil inlet hole 22 can be processed not only by the second part 42 of the filter 4, but also by the second part 41 of the filter 4, because the oil medium entering the grease gun oil inlet nozzle structure 1 through the oil inlet hole 22 can flow into at least a part of the second part 42.

[0113] In this embodiment, by spacing the second portion 41 and the oil inlet end 21, it can be ensured that the fluid has a sufficient distance to be pre-treated, such as pre-filtration or pre-regulation, before entering the filter 4, thereby improving the processing efficiency. Moreover, at least part of the extension surface of the second portion 41 of the filter 4 passes through the oil inlet hole 22, so that after the oil inlet end 21 contacts the bottom of the oil storage device, the oil passing through the oil inlet hole 22 can also be filtered through the second portion 41 of the filter 4, thereby avoiding the oil inlet end 21 affecting the contact area between the filter 4 and the oil after contacting the bottom of the oil storage device.

[0114] In some embodiments, as Figure 1 or Figure 2 or Figure 4 As shown, the grease gun nozzle structure 1 may further include an extension section 56 connected to the connecting portion 52, as shown in FIG. Figure 7 As shown, the extension section 56 is provided with a fixing pin 57 for preventing the oil inlet ball valve 55 from being separated from the oil passage 53 .

[0115] It can be understood that the extension section 56 can be an additional portion of the connecting portion 52 for connecting with an oil pump assembly or other components.

[0116] The fixing pin 57 may be a pin used to prevent the oil inlet ball valve 55 from leaving the grease gun oil inlet nozzle structure 1 , and the fixing pin 57 may be made of a hard material.

[0117] In this embodiment, the arrangement of the fixing pin 57 on the extension section 56 can ensure that the oil inlet ball valve 55 maintains a fixed position in the oil passage 53, preventing it from detaching from the grease gun oil inlet nozzle structure 1 due to vibration or pressure fluctuations. It can also avoid oil backflow caused by valve failure, thereby improving the reliability of the entire oil circuit system.

[0118] In some embodiments, the working principle of the grease gun nozzle structure 1 provided by the present disclosure can be as follows:

[0119] Oil flows evenly from the oil inlet 21 through the oil inlet hole 22 into the oil passage 53. The raised oil-passing protrusions of the filter 4 increase its surface area and reduce its flow rate, thereby improving filtration efficiency and effectively blocking impurities. Simultaneously, the oil inlet ball valve 55 near the oil outlet 3 opens when the oil pump assembly is operating normally, allowing oil to flow to the oil outlet 3. It closes when the oil pump assembly is stopped, preventing oil from flowing back. Ultimately, the filtered and flowing oil flows out through the oil outlet 3 and into the oil pump assembly or other oil circuit systems. Furthermore, the connection 52 is threaded to ensure stability and sealing, and the retaining pin 57 on the extension 56 prevents the oil inlet ball valve 55 from disengaging from the oil passage 53, thus ensuring the performance and reliability of the entire oil circuit system.

[0120] Based on the same concept, the present disclosure also provides a manual grease gun 100. Figure 5-6 As shown, the manual grease gun 100 may include the grease gun oil inlet nozzle structure 1 described in any of the above embodiments, and a pump body 110. The grease gun oil inlet nozzle structure 1 is threadedly connected to the pump body 110. The pump body 110 includes an oil outlet ball valve 120 arranged at one end close to the grease gun oil inlet nozzle structure 1, and the oil outlet ball valve 120 is provided with a piston rod 130 at the end away from the grease gun oil inlet nozzle structure 1. A spring 140 is provided in the piston rod 130, and a gasket 150 is provided between the piston rod 130 and the inner surface of the pump body 110; a movable handle 160 is provided at the end of the pump body 110 away from the grease gun oil inlet nozzle structure, and the output end of the pump body 110 is output to the outside through the movable handle 160; a fixed handle 170 is also provided between the movable handle 160 and the piston rod 130 and located on the outer surface of the pump body 110.

[0121] It can be understood that the pump body 110 can be the main part of the manual grease gun 100, which is used to contain oil and generate pressure; the oil outlet ball valve 120 can be a valve located at one end of the pump body 110 close to the grease gun oil inlet nozzle structure 1, used to control the flow of oil from the pump body 110; the piston rod 130 can be located at the end of the oil outlet ball valve 120 away from the grease gun oil inlet nozzle structure 1, connected to the movable handle 160, and used to move back and forth in the pump body 110 to generate negative pressure; the spring 140 can be an elastic member provided in the piston rod 130 for providing rebound force; the washer 150 can be a component provided between the piston rod 130 and the inner surface of the pump body 110 for sealing and reducing friction; the movable handle 160 can be located at one end of the oil outlet ball valve 120 away from the grease gun oil inlet nozzle structure 1, connected to the movable handle 160, and used to move back and forth in the pump body 110 to generate negative pressure; the spring 140 can be an elastic member provided in the piston rod 130 for providing rebound force; the washer 150 can be a component provided between the piston rod 130 and the inner surface of the pump body 110 for sealing and reducing friction; 0 can be located at one end of the pump body 110 away from the grease gun oil inlet nozzle structure, the movable handle 160 can be connected to the piston rod 130, and can be used to manually operate the piston rod 130 in the pump body 110 to move the piston rod 130 back and forth to generate pressure, and the spring 140 can provide the necessary rebound force so that the piston rod 130 can return to its original position after the movable handle 160 is released; the fixed handle 170 can be located between the movable handle 160 and the piston rod 130, located on the outer surface of the pump body 110, and is used to fix the movable handle 160; the pump oil outlet 180 can be an outlet for discharging the oil after entering the pump body 110, and the pump oil outlet 180 can also be connected to an oil outlet pipeline to increase the oil transmission distance.

[0122] It should be noted that the grease gun oil inlet nozzle structure 1 of the manual grease gun 100 can refer to the description of the aforementioned embodiment, and the present disclosure will not elaborate on it here.

[0123] It can be understood that the manual grease gun 100 provided in this embodiment can have all the beneficial effects of the above-mentioned grease gun oil inlet nozzle structure 1, and the present disclosure will not elaborate on them here.

[0124] In some embodiments, the manual grease gun 100 of the present disclosure operates as follows:

[0125] Reference Figure 5 and Figure 6 As shown, in the initial state, the relative positions of the movable handle 160 and the fixed handle 170 of the manual grease gun 100 can be as follows: Figure 5As shown, in this state, the user pulls the movable handle 160 upward, causing the piston rod 130 connected to the movable handle 160 to move upward in the pump body 110. Due to the negative pressure, the oil inlet ball valve 55 is sucked upward. After the oil inlet ball valve 55 opens, oil is sucked into the pump body 110 from the oil inlet nozzle structure 1. After the oil enters the pump body 110 and reaches the highest position inside the pump body 110, the movable handle 160 is pressed downward again, and the movable handle 160 drives the piston rod 130 downward. At this time, pressure is applied to the interior of the pump body 110, thereby closing the oil passage 53 below the grease gun oil inlet nozzle structure 1 by closing the oil inlet ball valve 55. After closing, the oil inside the pump body 110 will rush upward to open the oil outlet ball valve 120 and be discharged from the pump outlet 180. The user pulls the movable handle 160 once, and the manual grease gun 100 can perform the above work flow once, and can then deliver oil in a reciprocating manner.

[0126] The main body 5 of the grease gun inlet nozzle structure 1 introduces external oil into the pump body 110 through the oil passage 53 connecting its oil inlet end 21 and oil outlet end 3. The filter 4 in the oil passage 53 plays a key role in blocking debris and ensuring that only clean oil is sucked in, protecting the components within the pump body 110 and maintaining oil quality.

[0127] The gasket 150 ensures that the interior of the pump body 110 is isolated from the outside world during the movement of the piston rod 130, preventing oil leakage and air entry, thereby ensuring effective sealing and smooth operation of the manual grease gun 100.

[0128] Whenever the user operates movable handle 160, the pressure differential generated by the back-and-forth movement of piston rod 130, combined with the action of inlet ball valve 55 in oil inlet nozzle structure 1, pushes the oil in pump body 110 toward pump outlet 180. From there, it can be delivered to the desired location via the connected oil outlet pipeline. The effectiveness of this process is ensured by the control of inlet ball valve 55, which ensures that it opens when sufficient internal pressure is built up and closes when the pressure drops.

[0129] The fixed handle 170 can provide additional stability and support during operation, ensuring that the user has a fulcrum to apply force when pulling the movable handle 160, thereby ensuring smooth movement of the movable handle 160.

[0130] Through this continuous operation, the manual grease gun 100 can effectively extract grease from the container and deliver it to the area requiring lubrication. The design of components such as the spring 130 and washer 150 reduces wear and damage to internal mechanical components. This entire process is repeated continuously until the user completes the lubrication task or stops operation. The manual grease gun 100 provided in this application allows the user to efficiently and precisely control the output of lubricating oil through simple, repetitive manual operations, while ensuring the long-term durability of equipment requiring lubrication.

[0131] The manual grease gun 100 of this embodiment can filter the oil medium entering the grease gun oil inlet structure 1 through the filter screen 4 of the grease gun oil inlet structure 1, thereby reducing the content of impurities in the oil, thereby improving the purity of the oil delivered from the grease gun oil inlet structure 1 to the manual grease gun 100. This can reduce wear on the internal mechanical components of the manual grease gun 100, extend the service life of the manual grease gun 100, optimize the flow path of the oil medium in the manual grease gun 100, reduce oil flow resistance, and improve delivery efficiency. Furthermore, the control of the oil inlet ball valve 55 in the manual grease gun 100 can improve oil delivery efficiency. The design of the piston rod 130, spring 140, and gasket 150 can ensure the sealing performance of the oil outlet ball valve 120, prevent oil leakage, and improve system reliability. Furthermore, the provision of the movable handle 160 and the fixed handle 170 allows the user to conveniently operate the pump body 110 to extract and deliver oil.

[0132] It is understood that in this disclosure, "plurality" refers to two or more than two, and other quantifiers are similar. "And / or" describes the association relationship of related objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the related objects before and after are in an "or" relationship. The singular forms "a", "the" and "the" are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0133] It will be further understood that the terms "first," "second," and the like are used to describe various types of information, but such information should not be limited to these terms. These terms are used solely to distinguish information of the same type from one another and do not indicate a particular order or level of importance. In fact, the terms "first," "second," and the like are fully interchangeable. For example, first information could be referred to as second information, and similarly, second information could be referred to as first information without departing from the scope of this disclosure.

[0134] It can be further understood that the terms "center", "longitudinal", "lateral", "front", "back", "up", "down", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this embodiment and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation.

[0135] It is further understood that, unless otherwise specified, “connection” includes a direct connection where there are no other components between the two elements, and also includes an indirect connection where there are other elements between the two elements.

[0136] It is further understood that although operations are described in a particular order in the drawings in the embodiments of the present disclosure, this should not be construed as requiring that the operations be performed in the particular order shown or in a serial order, or that all of the operations shown be performed to obtain the desired results. In certain circumstances, multitasking and parallel processing may be advantageous.

[0137] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the technical concepts disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered merely as exemplary, and the true scope and spirit of the present disclosure are indicated by the following claims.

[0138] It should be understood that the present disclosure is not limited to the exact structures described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the scope of the appended claims.

Claims

1. A grease gun oil inlet nozzle structure, comprising: The main body includes an oil inlet end, an oil outlet end, and an oil passage connecting the oil inlet end and the oil outlet end. A connecting portion is provided on one side of the main body close to the oil outlet end, and the connecting portion is used to connect to the oil pump assembly; characterized in that, The oil passage cover is provided with a filter screen for blocking debris. The filter screen cover is arranged in the oil flow channel, and the filter screen is raised to form an oil flow convex portion, so that the surface area of the filter screen is larger than the area of the cross section of the oil flow channel close to the oil inlet end, and a gap is formed between the oil flow convex portion and the oil flow channel. The filter screen also includes a fixed edge, and a mounting groove is provided in the oil flow channel. The fixed edge is fixed in the mounting groove by a retaining spring.

2. The grease gun nozzle structure according to claim 1, characterized in that: The oil-passing convex portion is made of metal material, and the protruding direction of the oil-passing convex portion is toward the oil inlet end.

3. The grease gun nozzle structure according to claim 1, characterized in that: The oil-passing convex portion is cylindrical, conical, spherical or prism-shaped.

4. The grease gun oil inlet nozzle structure according to claim 1, characterized in that: An oil inlet ball valve is provided in the oil passage near the oil outlet end.

5. The grease gun nozzle structure according to claim 1, characterized in that: One or more oil inlet holes are arranged circumferentially on one side of the main body close to the oil inlet end, and the one or more oil inlet holes are communicated with the gap.

6. The grease gun oil inlet nozzle structure according to claim 1, characterized in that: The connecting portion is a thread.

7. The grease gun nozzle structure according to claim 4, characterized in that: Also includes: An extension section connected to the connecting portion is provided with a fixing pin for preventing the oil inlet ball valve from being separated from the oil passage.

8. A manual grease gun, characterized in that: include: The grease gun oil inlet nozzle structure according to any one of claims 1 to 7; as well as The pump body, the grease gun oil inlet nozzle structure is threadedly connected to the pump body, the pump body includes an oil outlet ball valve provided at one end close to the grease gun oil inlet nozzle structure, the oil outlet ball valve is provided at one end away from the grease gun oil inlet nozzle structure, a piston rod is provided in the piston rod, and a gasket is provided between the piston rod and the inner surface of the pump body; A movable handle is provided at one end of the pump body away from the grease gun oil inlet nozzle structure, and the output end of the pump body outputs to the outside through the movable handle; A fixed handle is sleeved on the outer surface of the pump body and is located between the movable handle and the piston rod.

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