A pneumatic quantitative oil injection lubrication system

Abstract

The present invention relates to the technical field of lubrication devices, and in particular to a pneumatic quantitative oil injection lubrication system, comprising: a bracket and an oil injection cylinder, a pressure regulating valve, a solenoid valve, and an oil storage cylinder disposed on the bracket; the oil injection cylinder comprises an oil injection cylinder body, an oil injection piston rod, and an oil injection piston connected to the oil injection piston rod; the oil injection cylinder body is provided with an air chamber, an oil pressure chamber, and a rod chamber connecting the air chamber and the oil pressure chamber; the oil injection piston is disposed within the air chamber and divides the air chamber into an inner air chamber and an outer air chamber; the oil injection piston rod extends into the rod chamber through the inner air chamber to separate the oil pressure chamber from the inner air chamber; the oil pressure chamber is respectively connected to the oil outlet and oil inlet of the oil injection cylinder body, and the oil inlet of the oil injection cylinder body is connected to the oil storage cylinder; the air inlet of the solenoid valve is connected to an air source via the pressure regulating valve, and the first air outlet and the second air outlet of the solenoid valve are respectively connected to the outer air chamber and the inner air chamber. The system can achieve quantitative control of lubricating grease, so that the machine can be effectively and well lubricated.

Description

Technical Field

[0001] The present invention relates to the technical field of lubrication devices, in particular to a pneumatic quantitative oil injection lubrication system. Background Art

[0002] Currently, manual grease guns and electric lubrication pumps are commonly used in the riveting machine industry to lubricate riveting machines. A manual grease gun uses a handheld grease gun handle. By leveraging the handle, the handle pushes a piston rod downward, squeezing the lubricant out of the oil chamber. Electric lubrication pumps, on the other hand, use a motor to drive a gear pump or plunger pump, squeezing grease from the oil tank to the machine parts requiring lubrication.

[0003] The disadvantages of manual oil injection lubrication are that it requires regular manpower to lubricate the machine. Due to human factors, the amount of lubricant added each time is difficult to control, which can easily lead to uneven lubrication and oil leakage. The disadvantages of electric oil injection lubrication are that due to the changes in the resistance of the riveting machine's oil system, the amount of lubricant added each time varies, resulting in uneven lubrication. If the lubrication cycle is shortened or the lubrication volume is increased, there will be excessive lubricant leakage, which not only wastes lubricant but also has an impact on the environment. The overflowed lubricant can easily drip from the machine and contaminate the products being produced. If the lubrication cycle is extended or the lubrication volume is reduced, insufficient lubrication will occur, causing rapid wear of the machine. Summary of the Invention

[0004] In view of the above problems, the present invention discloses a pneumatic quantitative oil injection lubrication system to solve the problem of uneven lubricating grease filling during machine lubrication in the prior art.

[0005] A pneumatic quantitative oil injection lubrication system comprises: a bracket and an oil injection cylinder, a pressure regulating valve, a solenoid valve and an oil storage cylinder arranged on the bracket;

[0006] and an oil filling cylinder having a plurality of oil filling cylinders and an oil filling piston rod connected to the oil filling piston rod. The oil filling cylinder body is provided with an air chamber, an oil pressure chamber and a rod chamber communicating with the air chamber and the oil pressure chamber. The longitudinal section of the air chamber is larger than the longitudinal sections of the rod chamber and the oil pressure chamber. The oil filling piston is arranged in the air chamber and is connected to the inner wall of the air chamber in a sealing and sliding manner to separate the air chamber into an inner air chamber and an outer air chamber. The oil filling piston rod extends into the rod chamber through the inner air chamber and is connected to the inner wall of the rod chamber in a sealing and sliding manner to separate the oil pressure chamber from the inner air chamber. The oil pressure chamber is respectively connected to the oil outlet and the oil inlet of the oil filling cylinder body, and the oil inlet of the oil filling cylinder body is connected to the oil storage cylinder.

[0007] The solenoid valve has an air inlet, a first air outlet and a second air outlet. The air inlet of the solenoid valve is connected to the air source through a pressure regulating valve. The first air outlet and the second air outlet of the solenoid valve are respectively connected to the outer air cavity and the inner air cavity.

[0008] In some embodiments, the oil storage cylinder includes an oil storage cylinder body and an oil storage piston located in the oil storage cylinder body, and the oil storage piston divides the inner cavity of the oil storage cylinder body into an air storage cavity and an oil storage cavity;

[0009] The second air outlet of the solenoid valve is also communicated with the air storage chamber.

[0010] In some embodiments, the oil storage cylinder further includes an oil storage piston rod fixedly connected to the oil storage piston, the oil storage piston rod extending out of the oil storage cylinder body through the oil storage cavity, and a scale is connected to one end of the oil storage piston rod located outside the oil storage cylinder body, and the scale extends out of the bracket and is slidable along the bracket.

[0011] In some embodiments, the oil storage cylinder body is provided with an oil chamber interface connected to the oil storage chamber, and the oil chamber interface is respectively connected to the oil replenishment one-way valve and the oil inlet of the oil filling cylinder body through a three-way joint.

[0012] In some embodiments, the three-way joint is connected to the oil replenishment nozzle through the oil replenishment one-way valve.

[0013] In some embodiments, the oil pressure chamber is connected to the oil outlet through an oil outlet one-way valve, and the oil pressure chamber is connected to the oil inlet through an oil inlet one-way valve.

[0014] In some embodiments, an end cover is provided on a side of the outer air cavity away from the oil injection piston; an outer wall of the end cover is sealedly connected to an inner wall of the outer air cavity;

[0015] An air port communicating with the outer air cavity is provided on the end cover, and the outer air cavity is communicated with the first air outlet of the solenoid valve through the air port on the end cover.

[0016] In some embodiments, the end cap is threadedly connected to the inner wall of the outer air cavity, and thread glue is provided between the end cap and the inner wall of the outer air cavity.

[0017] In some embodiments, a groove is formed on the inner wall of the rod cavity, and a sealing ring is provided in the groove to seal the oil injection piston rod to the inner wall of the rod cavity.

[0018] In some embodiments, the oil injection piston and the oil injection piston rod are fixedly connected by bolts.

[0019] The above invention has at least one of the following advantages or beneficial effects:

[0020] The present invention provides a pneumatic quantitative oil injection lubrication system that can achieve quantitative control of lubricating grease, so that the machine can be effectively and well lubricated. The pneumatic quantitative oil injection cylinder enables the extrusion amount of lubricating grease to be accurately and quantitatively controlled, and can easily achieve automatic control during use, while reducing the waste of lubricating grease and the impact on the environment, effectively protecting the environment and products. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention and its features, configurations, and advantages will become more apparent upon reading the detailed description of non-limiting embodiments with reference to the following drawings. Like reference numerals indicate like parts throughout the drawings. The drawings are not necessarily drawn to scale, emphasis being placed on illustrating the subject matter of the present invention.

[0022] Figure 1 A three-dimensional diagram of a pneumatic quantitative oil injection lubrication system according to an embodiment of the present invention;

[0023] Figure 2 This is a front view of a pneumatic quantitative oil injection lubrication system according to an embodiment of the present invention;

[0024] Figure 3 2 is a cross-sectional view of the oil filling cylinder in an embodiment of the present invention. DETAILED DESCRIPTION

[0025] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0026] like Figures 1 to 3 As shown, the present invention discloses a pneumatic quantitative oil injection lubrication system. Specifically, the pneumatic quantitative oil injection lubrication system includes: a bracket 2 and an oil injection cylinder 1, a pressure regulating valve 3, a solenoid valve 4 and an oil storage cylinder 5 arranged on the bracket 2.

[0027] Specifically, the oil filling cylinder 1 includes an oil filling cylinder body 11, an oil filling piston rod 12 and an oil filling piston 13 connected to the oil filling piston rod 12. The oil filling cylinder body 11 is provided with an air chamber 111, an oil pressure chamber 112 and a rod chamber communicating with the air chamber 111 and the oil pressure chamber 112. The longitudinal section of the air chamber 111 is larger than the longitudinal section of the rod chamber and the oil pressure chamber 112. The oil filling piston 13 is provided in the air chamber 111 and is connected to the inner wall of the air chamber 111 in a sealed sliding fit to separate the air chamber 111 into an inner air chamber (the air chamber 111 is separated by the oil filling piston 13 to form an inner air chamber). The oil pressure chamber 112 is connected to the oil outlet 113 and the oil inlet 114 of the oil filling cylinder body 11 respectively, and the oil inlet 114 of the oil filling cylinder body 11 is connected to the oil storage cylinder 5. During use, when compressed air is introduced into the inner air cavity, under the action of air pressure, the oil injection piston 13 drives the oil injection piston rod 12 to move toward the outer air cavity, causing the inner air cavity to expand and the outer air cavity to shrink. At this time, negative pressure is formed in the oil pressure cavity 112, and lubricating grease is forced to be sucked into the oil pressure cavity 112 from the oil storage cylinder 5 through the oil inlet 114 until the oil pressure cavity 112 is filled. When compressed air is introduced into the outer air cavity, the oil injection piston 13 moves from the outer air cavity to the inner air cavity under the action of air pressure, causing the outer air cavity to expand and the inner air cavity to shrink. At the same time, it drives the oil injection piston rod 12 to move toward the oil pressure cavity 112. At this time, the lubricating grease in the oil pressure cavity 112 is squeezed until the lubricating grease is completely squeezed out from the oil outlet 113. Since the volume of the oil pressure cavity 112 is fixed, the amount of lubricating grease squeezed out each time is also fixed, thus achieving quantitative extrusion of lubricating grease.

[0028] The solenoid valve 4 has an air inlet, a first air outlet and a second air outlet. The air inlet of the solenoid valve 4 is connected to the air source through the pressure regulating valve 3. The first air outlet and the second air outlet of the solenoid valve 4 are connected to the external air cavity and the internal air cavity respectively. The pressure regulating valve 3 can adjust the compressed air output by the air source to a suitable pressure before entering the solenoid valve 4. The solenoid valve 4 can connect the air inlet to the first air outlet or the second air outlet as needed through the reversing of the valve core; when it is necessary to use the oil filling cylinder 1 for oil filling, the air inlet is connected to the first air outlet to control the oil filling cylinder 1 to squeeze out lubricating grease; when it is necessary to fill oil into the oil filling cylinder 1, the air inlet is connected to the second air outlet to control the oil filling cylinder 1 to suck lubricating grease from the oil storage cylinder 5.

[0029] The oil storage cylinder 5 comprises an oil storage cylinder body and an oil storage piston 51 located in the oil storage cylinder body. The oil storage piston 51 divides the inner cavity of the oil storage cylinder body into an air storage chamber 53 and an oil storage chamber 54 (the oil storage chamber 54 is used to store lubricating grease). The second air outlet of the solenoid valve 4 is also connected to the air storage chamber 53, that is, the second air outlet of the solenoid valve 4 is respectively connected to the inner air cavity of the oil injection cylinder 1 and the air storage chamber 53 of the oil storage cylinder 5, so that when oil needs to be added to the oil injection cylinder body 11, compressed air can be introduced into the inner air cavity of the oil injection cylinder body 11 through the second air outlet of the solenoid valve 4. When the air pressure is too high, the compressed air can be sucked into the inner air cavity of the oil injection cylinder body 11. Under the action of , the oil filling piston 13 drives the oil filling piston rod 12 to move toward the outer air cavity, the inner air cavity increases, and the outer air cavity becomes smaller. At this time, negative pressure is formed in the oil pressure cavity 112, and the lubricating grease is forced to be sucked into the oil pressure cavity 112 from the oil storage cylinder 5 through the oil inlet 114; on the other hand, compressed air is introduced into the air storage cavity 53 of the oil storage cylinder 5 through the second air outlet of the solenoid valve 4, so that the oil storage piston moves toward the oil storage cavity 54 of the oil storage cylinder 5, so that the lubricating grease in the oil storage cavity 54 enters the oil inlet 114 of the oil filling cylinder body 11 from the oil storage cavity 54 of the oil storage cylinder body until the oil pressure cavity 112 is filled.

[0030] In a preferred embodiment of the present invention, the above-mentioned oil storage cylinder 5 also includes an oil storage piston rod 52 fixedly connected to the oil storage piston 51. The oil storage piston rod 52 extends out of the oil storage cylinder body through the oil storage cavity 54, and the end of the oil storage piston rod 52 located on the outside of the oil storage cylinder body is connected to a ruler 9, and the ruler 9 extends from the through hole reserved on the bracket 2. The ruler 9 can slide in the horizontal direction of the oil storage piston rod 52. The ruler 9 is used to indicate the oil level of the oil storage cylinder 5, so that the amount of lubricating grease in the oil storage cylinder 5 can be conveniently observed from outside the bracket 2 to determine whether it is necessary to replenish lubricating grease into the oil storage cylinder 5.

[0031] In a preferred embodiment of the present invention, an oil chamber interface connected to the oil storage chamber 54 is provided on the above-mentioned oil storage cylinder body, and the oil chamber interface is connected to the oil replenishing check valve 7 and the oil inlet 114 of the oil filling cylinder body 11 through a three-way joint 8 (that is, one joint of the three-way joint 8 is connected to the oil chamber interface, and the other two joints are connected to the oil replenishing check valve 7 and the oil inlet 114 of the oil filling cylinder body 11, respectively), and the three-way joint 8 is connected to the oil replenishing nozzle 6 through the oil replenishing check valve 7; when oil is replenished into the oil filling cylinder body 11, the oil replenishing check valve 7 can prevent the lubricating grease from flowing into the oil replenishing nozzle 6, so that the lubricating grease can only flow into the oil filling cylinder body 11 in one direction; when it is necessary to replenish oil into the oil storage cylinder 5, the lubricating grease can be replenished into the oil storage chamber 54 of the oil storage cylinder 5 through the oil replenishing nozzle 6.

[0032] In a preferred embodiment of the present invention, the above-mentioned oil pressure chamber 112 is connected to the oil outlet 113 through an oil outlet one-way valve 17. The above-mentioned oil outlet one-way valve 17 is installed in the oil outlet 113 at the left end of the oil pressure chamber 112, and is used to control the one-way flow of lubricating grease, so that the lubricating grease can only flow out from the oil outlet 113; the above-mentioned oil pressure chamber 112 is connected to the oil inlet 114 through the oil inlet one-way valve 16, and the lubricating grease enters the oil pressure chamber 112 of the oil filling cylinder body 11 through the oil inlet one-way valve 16; during the process of extruding the lubricating grease, the oil inlet one-way valve 16 can prevent the lubricating grease from overflowing from the oil inlet one-way valve 16, so that the lubricating grease can only flow in one direction.

[0033] In a preferred embodiment of the present invention, an end cap 14 is provided on the side of the outer air cavity away from the oil injection piston 13; the outer wall of the end cap 14 is sealed with the inner wall of the outer air cavity; an air port communicating with the outer air cavity is provided on the end cap 14, and the outer air cavity is connected to the first air outlet of the solenoid valve 4 through the air port 116 on the end cap 14. The end cap 14 is threadedly connected to the inner wall of the outer air cavity, and thread glue is provided between the end cap 14 and the inner wall of the outer air cavity to achieve a sealed connection between the end cap 14 and the inner wall of the outer air cavity, so that after compressed air is introduced into the outer air cavity, the compressed air will not overflow from the gap between the end cap 14 and the inner wall of the outer air cavity; of course, in other embodiments, the sealed connection between the end cap 14 and the inner wall of the outer air cavity can also be achieved by embedding a sealing ring 15 in the outer wall of the end cap 14, which does not affect the purpose of the present invention.

[0034] In a preferred embodiment of the present invention, a groove is provided on the inner wall of the rod cavity, and a sealing ring 15 is provided in the groove to seal the oil injection piston rod 12 with the inner wall of the rod cavity to separate the air cavity 111 and the oil pressure cavity 112.

[0035] In a preferred embodiment of the present invention, the oil injection piston 13 and the oil injection piston rod 12 are fixedly connected by bolts, so that a stable connection between the oil injection piston 13 and the oil injection piston rod 12 can be achieved.

[0036] In a preferred embodiment of the present invention, the oil outlet 113 and the outer air cavity of the oil filling cylinder 11 are respectively arranged at the front and rear ends of the oil filling cylinder 11, and the oil inlet 114 of the oil filling cylinder 11 is arranged on one side of the oil filling cylinder.

[0037] Those skilled in the art should understand that they can implement variations by combining the prior art with the above embodiments, which will not be described in detail here. Such variations do not affect the essence of the present invention and will not be described in detail here.

[0038] The above describes the preferred embodiments of the present invention. It should be understood that the present invention is not limited to the above-mentioned specific embodiments, and the devices and structures that are not described in detail should be understood to be implemented in a common manner in the art; any technician familiar with the art can use the above-mentioned disclosed methods and technical contents to make many possible changes and modifications to the technical solutions of the present invention without departing from the scope of the technical solutions of the present invention, or modify them into equivalent embodiments of equivalent changes, which does not affect the essential content of the present invention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention that do not depart from the content of the technical solutions of the present invention are still within the scope of protection of the technical solutions of the present invention.

Claims

1. A pneumatic quantitative oil injection lubrication system, characterized in that: include: The bracket and the oil filling cylinder, pressure regulating valve, solenoid valve and oil storage cylinder arranged on the bracket; the oil filling cylinder includes an oil filling cylinder body, an oil filling piston rod and an oil filling piston connected to the oil filling piston rod, the oil filling cylinder body is provided with an air cavity, an oil pressure cavity and a rod cavity connecting the air cavity and the oil pressure cavity, the longitudinal section of the air cavity is larger than the longitudinal section of the rod cavity and the oil pressure cavity, the oil filling piston is arranged in the air cavity and is connected to the inner wall of the air cavity in a sealing sliding fit to separate the air cavity into an inner air cavity and an outer air cavity, the oil filling piston The rod extends into the rod cavity through the inner air cavity and is connected to the inner wall of the rod cavity in a sealed sliding manner to isolate the pressure oil cavity from the inner air cavity; the pressure oil cavity is respectively connected to the oil outlet and the oil inlet of the oil injection cylinder body, and the oil inlet of the oil injection cylinder body is connected to the oil storage cylinder; the solenoid valve has an air inlet, a first air outlet and a second air outlet, the air inlet of the solenoid valve is connected to the air source through a pressure regulating valve, and the first air outlet and the second air outlet of the solenoid valve are respectively connected to the outer air cavity and the inner air cavity; The oil storage cylinder includes an oil storage cylinder body and an oil storage piston located in the oil storage cylinder body, wherein the oil storage piston divides the inner cavity of the oil storage cylinder body into an air storage cavity and an oil storage cavity; the second air outlet of the solenoid valve is also connected to the air storage cavity; The oil storage cylinder further includes an oil storage piston rod fixedly connected to the oil storage piston, the oil storage piston rod extending out of the oil storage cylinder body through the oil storage cavity, and a scale is connected to one end of the oil storage piston rod located outside the oil storage cylinder body, and the scale extends out of the bracket from the reserved through hole of the bracket; The oil storage cylinder body is provided with an oil chamber interface which is in communication with the oil storage chamber, and the oil chamber interface is respectively connected to the oil replenishment one-way valve and the oil inlet of the oil filling cylinder body through a three-way joint; The three-way joint is connected to the oil replenishment nozzle through the oil replenishment one-way valve; The oil pressure chamber is connected to the oil outlet through an oil outlet one-way valve, and the oil pressure chamber is connected to the oil inlet through an oil inlet one-way valve; An end cover is provided on a side of the outer air cavity away from the oil injection piston; an outer wall of the end cover is sealedly connected to an inner wall of the outer air cavity; an air port communicating with the outer air cavity is opened on the end cover, and the outer air cavity is connected to the first air outlet of the solenoid valve through the air port on the end cover; The end cap is threadedly connected to the inner wall of the outer air cavity, and thread glue is provided between the end cap and the inner wall of the outer air cavity; A groove is formed on the inner wall of the rod cavity, and a sealing ring is provided in the groove to seal the oil injection piston rod with the inner wall of the rod cavity; The oil injection piston and the oil injection piston rod are fixedly connected by bolts.

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