Special quick connector for grease gun

Abstract

The utility model relates to a special quick-plug connector for a grease gun, which comprises a grease storage barrel, an adapter disc, a grease gun pump body and a piston piece, and aims to add the adapter disc on the basis of the traditional grease gun structure, the adapter disc is matched with a grease pressing disc at the same time, and an original threaded connection mode is replaced by a quick-plug connection mode. Operation steps during grease suction of the grease gun are simplified; in the transfer process of the oil storage barrel between the oil gun pump body and the oil pressing disc, due to the fact that the inner diameter of the quick-plug connector is smaller than that of the oil storage barrel, the circulation area of the quick-plug connector is small, and grease in the oil storage barrel is effectively prevented from naturally flowing out in the period; and less air needs to be discharged from the oil gun pump body, so that the oil outlet efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of grease guns, and in particular to a quick-connect fitting specifically for grease guns. Background Technology

[0002] Traditional grease guns typically consist of a grease gun nozzle and a reservoir. The reservoir has external threads and is connected to the grease gun nozzle for grease supply via these threads. Inside the reservoir is a piston for grease suction. When the reservoir needs to suction grease, it is necessary to rotate the reservoir to remove the grease gun nozzle, then install the reservoir onto the pressure plate via its external threads. By pulling the piston, grease is drawn into the reservoir. After that, the reservoir is rotated to remove it from the pressure plate, and the grease gun nozzle is re-threaded and reconnected for grease supply.

[0003] During the grease gun's oil suction process, the operator needs to rotate the oil reservoir four times to assemble and disassemble the oil reservoir from the grease gun head and pressure plate. This makes the process too cumbersome each time the grease gun suctions oil, seriously affecting work efficiency. Therefore, a special quick-connect fitting for grease guns is needed to simplify the operation steps and improve work efficiency. Utility Model Content

[0004] To overcome the shortcomings of the prior art, the technical solution adopted by this utility model is: a quick-connect fitting for a grease gun, including an oil reservoir, an adapter plate, a sealing gasket, a grease gun pump body, and a piston. The oil reservoir is detachably connected to the grease gun pump body via the adapter plate. The adapter plate is provided with a quick-connect fitting facing the grease gun pump body. The quick-connect fitting is sealed to the grease gun pump body via the sealing gasket. The grease gun pump body is provided with an oil suction port that communicates with the quick-connect fitting. The oil reservoir is provided with a piston for absorbing oil. The grease in the oil reservoir is output from the grease gun pump body sequentially through the quick-connect fitting and the oil suction port.

[0005] By adopting the above technical solution, an adapter plate is added to the traditional grease gun structure. The adapter plate is also compatible with the pressure plate. The original threaded connection method is replaced by a quick-connect connection, which simplifies the operation steps when the grease gun is drawing oil. During the transfer of the oil reservoir between the grease gun pump body and the pressure plate, the inner diameter of the quick-connect connector is smaller than that of the oil reservoir, which also results in a smaller flow area of ​​the quick-connect connector. This effectively prevents the grease in the oil reservoir from flowing out naturally during this period. At the same time, since the quick-connect connector extends to the oil suction port of the grease gun pump body, less air needs to be discharged from the grease gun pump body, thereby improving the oil output efficiency.

[0006] The present invention is further configured such that the adapter plate has an upper threaded portion for threaded connection to the oil gun pump body and a lower threaded portion for threaded connection to the oil reservoir.

[0007] The above technical solutions all use standardized threaded designs for the connection of the adapter plates, which makes the adapter plates compatible with older oil reservoirs, ensuring that older grease guns will not be phased out due to structural changes.

[0008] The present invention is further configured such that the quick-connect plate has a protrusion for limiting the position, the quick-connect connector extends outward beyond the protrusion, the oil gun pump body has a mounting cavity for accommodating the quick-connect connector, and the sealing gasket is snapped into the mounting cavity.

[0009] Using the above technical solution, the pressure plate is provided with a countersunk groove that matches the protrusion. When the oil reservoir is sucking oil through the pressure plate, the protrusion and the quick-connect fitting are simultaneously engaged in the countersunk groove, which improves the connection strength between the oil reservoir and the pressure plate. When the oil reservoir is sucking oil and is subjected to radial force, the quick-connect fitting is prevented from being damaged by the limiting protection of the protrusion.

[0010] The present invention is further configured such that the diameter of the oil suction port is smaller than the inner diameter of the quick-connect portion, and the oil suction port is located on the inner side of the quick-connect portion.

[0011] Furthermore, the adapter plate is provided with a first sealing groove and a second sealing groove for installing the sealing ring at the upper threaded part and the lower threaded part, respectively.

[0012] By adopting the above technical solution, the sealing effect at the connection between the adapter plate and the oil reservoir and the oil gun pump body is improved by the first and second sealing grooves. The quick-connect connector extends to the oil suction port of the oil gun pump body, so that a vacuum oil suction environment is effectively formed between the oil reservoir and the quick-connect connector, ensuring that there is no residual grease around the quick-connect connector and improving the oil suction efficiency.

[0013] The embodiments of this utility model will be further described below with reference to the accompanying drawings. Attached Figure Description

[0014] Figure 1 This is an exploded view of the structure of this utility model;

[0015] Figure 2 This is a cross-sectional view of the present invention;

[0016] Figure 3 This is a cross-sectional view of the adapter plate of this utility model;

[0017] Figure 4 This is a cross-sectional view of the present invention when oil is drawn in through the pressure plate;

[0018] Wherein: 1-oil reservoir, 2-transfer plate, 3-sealing gasket, 4-oil gun pump body, 5-piston, 6-pressure plate, 10-quick connector, 21-upper thread, 22-lower thread, 24-protrusion, 25-first sealing groove, 26-second sealing groove, 41-oil suction port, 42-installation cavity, 61-countersunk groove; Detailed Implementation

[0019] like Figure 1 , 2 As shown, this embodiment provides a quick-connect fitting for a grease gun, including an oil reservoir 1, an adapter plate 2, a sealing gasket 3, a grease gun pump body 4, and a piston 5. The oil reservoir 1 is detachably connected to the grease gun pump body 4 via the adapter plate 2. The adapter plate 2 is provided with a quick-connect fitting 10 facing the grease gun pump body 4. The quick-connect fitting 10 is sealed to the grease gun pump body 4 via the sealing gasket 3. The grease gun pump body 4 is provided with an oil suction port 41 that communicates with the quick-connect fitting 10. The oil reservoir 1 is provided with a piston 5 for absorbing oil. The grease in the oil reservoir 1 is output from the grease gun pump body 4 through the quick-connect fitting 10 and the oil suction port 41 in sequence.

[0020] Combination Figure 3 As shown, in this embodiment, the adapter plate 2 is provided with an upper threaded portion 21 for threaded connection to the oil gun pump body 4 and a lower threaded portion 22 for threaded connection to the oil reservoir 1. The adapter plate 2 is provided with a protrusion 24 for limiting the position. The quick-connect connector 10 extends outward beyond the protrusion 24. The oil gun pump body 4 is provided with a mounting cavity 42 for accommodating the quick-connect connector 10. The sealing gasket 3 is snapped into the mounting cavity 42. The diameter of the oil suction port 41 is smaller than the inner diameter of the quick-connect connector 10, and the oil suction port 41 is located inside the quick-connect connector 10. The adapter plate 2 is provided with a first sealing groove 25 and a second sealing groove 26 for installing the sealing ring at the upper threaded portion 21 and the lower threaded portion 22, respectively.

[0021] Combination Figure 4 As shown, the working principle of this utility model is as follows: When absorbing oil, the oil gun pump body 4 is first disassembled, and the oil storage cylinder 1 is quickly connected to the oil pressure plate 6 through the quick-connect connector 10. The oil pressure plate 6 is provided with a countersunk groove 61 that matches the protrusion 24 and the quick-connect connector 10. When the oil storage cylinder 1 absorbs oil through the oil pressure plate 6, the protrusion 24 and the quick-connect connector 10 are simultaneously engaged in the countersunk groove, pulling the piston 5, which generates a negative pressure in the oil storage cylinder 1 and draws the grease into the oil storage cylinder 1. After the oil is absorbed, the oil storage cylinder 1 is pulled out, and then the oil gun pump body 4 is threadedly connected through the adapter plate 2. The plunger in the oil gun pump body 4 is then controlled to move back and forth, which generates a negative pressure in the oil suction port 41 and draws the grease out of the oil storage cylinder 1, thereby achieving the purpose of oil supply.

[0022] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A quick-connect fitting specifically for grease guns, characterized in that, The device includes an oil reservoir (1), a transfer plate (2), a sealing gasket (3), an oil gun pump body (4), and a piston (5). The oil reservoir (1) is detachably connected to the oil gun pump body (4) via the transfer plate (2). The transfer plate (2) is provided with a quick-connect connector (10) facing the oil gun pump body (4). The quick-connect connector (10) is sealed to the oil gun pump body (4) via the sealing gasket (3). The oil gun pump body (4) is provided with an oil suction port (41) that communicates with the quick-connect connector (10). The oil reservoir (1) is provided with a piston (5) for absorbing oil. The grease in the oil reservoir (1) is output from the oil gun pump body (4) in sequence through the quick-connect connector (10) and the oil suction port (41).

2. The quick-connect fitting for a grease gun according to claim 1, characterized in that: The adapter plate (2) is provided with an upper threaded part (21) for threaded connection to the oil gun pump body (4) and a lower threaded part (22) for threaded connection to the oil reservoir (1).

3. The quick-connect fitting for a grease gun according to claim 2, characterized in that: The adapter plate (2) is provided with a protrusion (24) for limiting the position, and the quick connector (10) extends outward beyond the protrusion (24). The oil gun pump body (4) is provided with a mounting cavity (42) for accommodating the quick connector (10), and the sealing gasket (3) is snapped into the mounting cavity (42).

4. The quick-connect fitting for a grease gun according to claim 3, characterized in that: The diameter of the oil suction port (41) is smaller than the inner diameter of the quick connector (10), and the oil suction port (41) is located on the inner side of the quick connector (10).

5. A quick-connect fitting for a grease gun according to claim 4, characterized in that: The adapter plate (2) is provided with a first sealing groove (25) and a second sealing groove (26) for installing the sealing ring at the upper threaded part (21) and the lower threaded part (22), respectively.

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