Grease nipple with cleanable head

Abstract

The utility model discloses a grease nipple with a cleanable head, and relates to the technical field of grease gun accessories. The problems that in the prior art, grease nipple cleaning and oiling operation are separated, and efficiency is low are solved. The grease filling device comprises a grease filling pipe used for conveying grease and a connecting part used for being connected with a grease gun. A scraper part is coaxially arranged outside the oil filling pipe, and a scraper extending forwards is arranged on the scraper part. When the grease nipple is in butt joint with equipment, the scraper of the scraper part can firstly scrape off solidified greasy dirt on the surface of the grease nipple, the scraper can align the oil injection port in the front end of the oil injection pipe to a hole part to be oiled at the same time, and then the oil injection pipe in the center carries out oil injection. According to the utility model, the cleaning and oiling functions are integrated, the operation is simplified, the oiling quality is ensured, and the working efficiency is obviously improved.

Description

Technical Field

[0001] This utility model relates to the field of grease gun technology, specifically to a grease-cleaning nozzle. Background Technology

[0002] A grease nozzle is a component used on a grease gun, through which the grease gun dispenses grease into the machine. During actual use, a significant amount of grease can remain on the nozzle, which can affect subsequent uses and obstruct grease dispensing. After grease dispensing, a considerable amount of grease often remains on the nozzle, and once it solidifies, it can also hinder the next grease dispensing. To prevent solidified grease and other impurities from affecting subsequent grease dispensing, a grease nozzle with a cleanable head is needed. Utility Model Content

[0003] This invention combines a grease cleaning mechanism with a grease nipple, designing a grease nipple with a cleanable head. This allows for cleaning of the grease nipple while grease is being dispensed, ensuring that the grease does not solidify and clog the grease nipple.

[0004] The specific technical solution adopted in this utility model is as follows:

[0005] A grease nipple with a cleanable head includes an injection tube for delivering grease and a connector for connecting to a grease gun. The injection tube passes through the center of the connector and includes a scraper portion coaxially disposed on the outside of the injection tube. The front end of the scraper portion extends with a scraper for scraping and cleaning the grease nipple of the device to be lubricated. The inner side of the scraper forms a cutting edge, and the front end of the scraper is flush with or protrudes from the injection port at the front end of the injection tube.

[0006] The scraper section is provided with at least two scrapers, and the inner side of each scraper is provided with a slope.

[0007] The surface of the ramp is concave, and the concave surface of the ramp fits the outer contour of the oil injection nozzle of the equipment to be lubricated.

[0008] The scraper section is connected to the oil injection pipe by a snap-fit ​​connection or by a threaded connection.

[0009] When the scraper section and the oil injection pipe are connected by a snap-fit, the oil injection pipe is provided with a pipe opening fixing part. The pipe opening fixing part is a star-shaped component. The pipe opening fixing part is provided with the same number of protrusions as the scraper section, and the width of the protrusions is slightly less than or equal to the distance between adjacent scrapers.

[0010] The oil injection pipe has a spring sleeved at the pipe between the pipe opening fixing part and the connecting part.

[0011] When the scraper is connected to the oil injection pipe via a threaded connection, the oil injection port of the oil injection pipe is provided with an external thread on the rear side.

[0012] The oil injection pipe is connected to the connecting part by a threaded connection or is integrated with the connecting part. When the oil injection pipe is connected to the connecting part by a threaded connection, the end of the oil injection pipe is provided with an external thread.

[0013] The oil injection port of the oil injection pipe is a tapered pipe with a smaller front end and a larger rear end.

[0014] The beneficial effects of this invention are as follows: By adding a scraper section in front of the grease fitting, this invention not only has the function of grease filling but also the function of cleaning oil stains and impurities. Furthermore, this invention can complete both the "cleaning" and "grease filling" steps in a single connection operation, significantly simplifying the operation process and saving operation time. Attached Figure Description

[0015] Figure 1 This is an overall structural diagram of the first embodiment of the present utility model.

[0016] Figure 2 This is a cross-sectional view of the first embodiment of the present invention.

[0017] Figure 3 This is an exploded structural view of the first embodiment of the present invention.

[0018] Figure 4 This is an overall structural diagram of the second embodiment of the present utility model.

[0019] Figure 5 This is a cross-sectional view of the second embodiment of the present invention.

[0020] Figure 6 This is an exploded structural view of the second embodiment of the present invention.

[0021] Figure 7 This is an overall structural diagram of the third embodiment of the present utility model.

[0022] Figure 8 This is a cross-sectional view of the third embodiment of the present invention.

[0023] Figure 9 This is an exploded structural view of the third embodiment of the present invention.

[0024] Figure 10 This is an overall structural diagram of the fourth embodiment of the present utility model.

[0025] Figure 11 This is a cross-sectional view of the fourth embodiment of the present invention.

[0026] Figure 12 This is an exploded structural view of the fourth embodiment of the present invention.

[0027] Figure 13 This is an overall structural diagram of the fifth embodiment of the present utility model.

[0028] Figure 14 This is a cross-sectional view of the fifth embodiment of the present invention.

[0029] In the diagram: 1. Scraper section; 2. Oil injection pipe; 21. Oil injection port; 22. Pipe head fixing section; 3. Spring section; 4. Connecting section; 41. Interface; 5. External thread. Detailed Implementation

[0030] The present invention will now be described in detail with reference to the accompanying drawings.

[0031] like Figures 1 to 14 A grease gun nozzle with a cleaning head includes a grease injection tube 2, a connecting part 4, and a scraper part 1. One end of the connecting part 4 has an interface 41 with internal threads milled into it. The interface 41 is used to connect to the grease gun's hose or rigid tube, thereby fixing the grease gun nozzle to the grease gun. The grease injection tube 2 is the grease delivery channel, passing through the center of the connecting part 4, and has a grease injection port 21 at its front end. High-pressure grease pumped from the grease gun enters the grease injection tube 2 through the connecting part 4 and is ejected from the grease injection port 21 at the front end of the grease injection tube 2.

[0032] The scraper section 1 is generally annular or star-shaped, and it is coaxially mounted on the outside of the oil injection pipe 2. The scraper section 1 has at least two forward-extending scrapers. The inner surface of each scraper is an inwardly concave slope, designed to facilitate scraping and cleaning of grease and grime. The curvature of the concave slope matches the contour of the grease nipple on the device to be lubricated, making it easy to align the present invention with the grease nipple on the device. When the present invention is connected to the grease nipple of the device to be lubricated, the concave slope on the scraper provides an automatic guiding effect, allowing direct connection between the grease nipple of the device to be lubricated and the oil injection port 21 of the oil injection pipe 2 located at the center of the inner side of the scraper section 1.

[0033] As a preferred embodiment of this utility model, the oil injection port 21 at the front end of the oil injection pipe 2 is tapered with a smaller front end and a larger rear end. The purpose of this design is to be able to accommodate more types of oil injection nozzles and to prevent leakage caused by excessive oil output due to an excessively large oil injection port 21.

[0034] In use, the user holds the grease gun and aligns the head of the device with the grease fitting on the equipment to be lubricated. Because the scraper part 1 surrounds the grease fitting tube 2, and its scraper tip is essentially flush with or slightly forward of the port of the grease fitting tube 2, the slope of the scraper part 1 will first contact the surface of the grease fitting during the connection process. The user only needs to press and rotate the grease gun slightly, and the scraper part 1 will scrape away the hardened grease, dust, and other impurities adhering to the grease fitting. Simultaneously, the hardened grease and other dust impurities are discharged outwards along the slope. Afterwards, the user continues to push the grease gun forward, at which point the central port of the grease fitting tube 2 will precisely and tightly connect with the cleaned grease fitting. Then, the user pulls the trigger of the grease gun, and grease will smoothly flow into the lubrication point, completing the integrated cleaning and grease application operation.

[0035] For different application scenarios, this utility model proposes five embodiments.

[0036] Among them, such as Figures 1 to 3 As shown, Figures 1 to 3 This is the first embodiment of the present invention. In the first embodiment, the rear end of the oil injection pipe 2 is milled with an external thread 5. The oil injection pipe 2 is installed in the channel inside the connecting part 4 by means of a threaded connection, and its front end protrudes outside the connecting part 4. In this embodiment, a pipe opening fixing part 22 is provided on the rear side of the oil injection port 21 of the oil injection pipe 2. The pipe opening fixing part 22 is a plate-shaped star-shaped component, and it has the same number of protrusions as the scrapers of the scraper part 1. The width of each protrusion on the pipe opening fixing part 22 is less than or equal to the distance between adjacent scrapers on the scraper part 1. The scraper part 1 is installed on the pipe opening fixing part 22 by means of a snap-fit ​​connection. When the scraper part 1 is snapped onto the pipe opening fixing part 22, the protrusions provided on the pipe opening fixing part 22 are fitted between each scraper of the scraper part 1. A spring part 3 is sleeved on the pipe between the pipe opening fixing part 22 of the oil injection pipe 2 and the front end of the connecting part 4. The spring part 3 is designed to stably position the scraper part 1 at the front end of the oil injection pipe 2, so that it can move back and forth to a certain extent to scrape off the oil stains while also stabilizing its axial position on the oil injection pipe. This allows the scraper part 1 to better connect with the oil injection nozzle of the equipment to be oiled and perform the oil injection operation while scraping off the oil stains.

[0037] During assembly of this embodiment, first, the scraper part 1 is fitted onto the rear end of the oil injection pipe 2, and then the scraper part 1 is pushed forward until it abuts against the pipe opening fixing part 22 of the oil injection pipe 2. At this time, the scraper part 1 is attached to the front end of the oil injection pipe 2 via a snap-fit ​​connection. Next, the spring part 3 is fitted between the pipe opening fixing part 22 and the end of the oil injection pipe 2. Finally, the external thread 5 at the end of the oil injection pipe 2 is screwed into the threaded interface at the front end of the connecting part 4, thus completing the assembly of this embodiment.

[0038] like Figures 4 to 6As shown, Figures 4 to 6 This is the second embodiment of the present invention. In this embodiment, the scraper part 1 and the oil filling tube 2 are integrally formed. The end of the scraper part 1 is provided with an external thread 5, and the integral component formed by the scraper part 1 and the oil filling tube 2 is fixedly connected to the connecting part 4 by a threaded connection. The purpose of this arrangement is to make the overall structure of the grease nipple more integrated, thereby improving the overall structural strength and durability of the grease nipple.

[0039] like Figures 7 to 9 As shown, Figures 7 to 9 This is the third embodiment of the present invention. In this embodiment, the oil injection pipe 2 and the connecting part 4 are integrally formed. The oil injection port 21 of the oil injection pipe 2 is provided with an external thread 5, and the scraper part 1 is fixedly connected to the integral component formed by the oil injection pipe 2 and the connecting part 4 through a threaded connection. This modular structure makes it easier to disassemble and assemble the scraper part 1 with the oil injection pipe 2 and the connecting part 4, and allows for the replacement of worn scraper parts at any time.

[0040] like Figures 10 to 12 As shown, Figures 10 to 12 This is the fourth embodiment of the present invention. In this embodiment, the scraper part 1 and the connecting part 4 are integrally formed, and the end of the oil injection pipe 2 is provided with an external thread 5. The oil injection pipe 2 is fixedly connected to the integral component formed by the scraper part 1 and the connecting part 4 through a threaded connection. This modular structure makes it easier to disassemble and assemble the oil injection pipe 2 with the scraper part 1 and the connecting part 4, and also allows for the replacement of worn oil injection pipes at any time.

[0041] like Figure 13 , Figure 14 As shown, Figure 13 , Figure 14 This is the fifth embodiment of the present invention. In this embodiment, the scraper part 1, the oil injection pipe 2, and the connecting part 4 are integrally formed. This embodiment is applicable to grease nipples integrally cast by injection molding. Injection molding greatly reduces the manufacturing cost of grease nipples, making this embodiment a suitable choice for applications where durability requirements are not high.

[0042] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model. The scope of protection claimed by this utility model is defined by the claims and their equivalents.

Claims

1. A grease gun nozzle with a cleanable head, comprising a grease injection tube (2) for delivering grease and a connecting part (4) for connecting to a grease gun, the grease injection tube (2) passing through the center of the connecting part (4), characterized in that: It also includes a scraper section (1) coaxially disposed on the outside of the oil injection pipe (2). The front end of the scraper section (1) is provided with a scraper. The scraper is used to scrape and clean the oil injection nozzle of the equipment to be lubricated. The inner side of the scraper forms a blade. The front end of the scraper is flush with or protrudes from the oil injection port (21) at the front end of the oil injection pipe (2).

2. The grease-cleaning nozzle according to claim 1, characterized in that: The scraper section (1) is provided with at least two scrapers, and the inner side of each scraper is provided with a slope.

3. The grease-cleaning nozzle according to claim 2, characterized in that: The surface of the ramp is concave, and the concave surface of the ramp fits the outer contour of the oil injection nozzle of the equipment to be lubricated.

4. A grease-cleaning nozzle according to claim 1, characterized in that: The scraper part (1) is connected to the oil injection pipe (2) by snap-fit ​​or by threaded connection.

5. A grease-cleaning nozzle according to claim 4, characterized in that: When the scraper part (1) and the oil injection pipe (2) are connected by a snap-fit, the oil injection pipe (2) is provided with a pipe opening fixing part (22). The pipe opening fixing part (22) is a star-shaped component. The pipe opening fixing part (22) is provided with the same number of protrusions as the scraper part (1), and the width of the protrusions is slightly less than or equal to the distance between adjacent scrapers.

6. A grease-cleaning nozzle according to claim 5, characterized in that: The oil injection pipe (2) has a spring part (3) fitted on the pipe between the pipe opening fixing part (22) and the connecting part (4).

7. A grease-cleaning nozzle according to claim 4, characterized in that: When the scraper part (1) is connected to the oil injection pipe (2) by a threaded connection, the oil injection port (21) of the oil injection pipe (2) is provided with an external thread (5) on the rear side.

8. A grease-cleaning nozzle according to claim 1, characterized in that: The oil injection pipe (2) is connected to the connecting part (4) by a threaded connection or is integrated with the connecting part (4). When the oil injection pipe (2) is connected to the connecting part (4) by a threaded connection, the end of the oil injection pipe (2) is provided with an external thread (5).

9. A grease-cleaning nozzle according to claim 1, characterized in that: The oil injection port (21) of the oil injection pipe (2) is a tapered pipe with a small front end and a large rear end.

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