Lubricating pump core

Abstract

The utility model discloses a lubricating pump core which comprises a pump core body, a piston rod is connected to one side of the interior of the pump core body in an inserted mode, a connecting piece is arranged on one side of the piston rod, an oil outlet hole is formed in the front end of one side of the interior of the pump core body, and a limiting nut is arranged on the other side of the interior of the pump core body. And a valve core is arranged in an inner hole of the pump core main body between the limiting nut and the piston rod. Through the arrangement of the first limiting piece and the second limiting piece, when in use, the first limiting piece is arranged on one side of the connecting piece and between the outer side of the piston rod and the inner side of the piston rod spring, so that one side of the piston rod spring connected with the connecting piece can be limited; when the piston rod drives the piston rod spring to be compressed and deformed, one side in contact with the connecting piece is obliquely bent, and similarly, the other side of the piston rod spring is limited and stabilized through the second limiting piece, so that the piston rod spring is normally and stably compressed and stretched to drive the piston rod to reset, and normal work of the pump core is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of lubrication pumps, in particular to a pump core of a lubrication pump. Background Art

[0002] A lubrication pump is a lubrication device that extracts lubricating oil from a storage tank and presses it into the parts of the mechanical equipment that need lubrication. In industrial production, lubricating oil pumps are widely used in various mechanical equipment, such as engines, hydraulic systems, lubrication systems, etc. The pump core is one of the core components of the oil pump. The pump core is also called a plunger, which plays an important role in the operation of the pump.

[0003] As disclosed in the utility model with the authorization announcement number CN220748512U, a plunger pump core for a centralized lubricating oil pump includes a pump core housing, a piston rod, a valve core and a limit nut, wherein the limit nut is screwed into the inner hole of the pump core housing, one end of the piston rod extends axially into the inner hole of the pump core housing, the valve core is located in the inner hole of the pump core housing and between the limit nut and the piston rod, a valve core spring is provided between the limit nut and the valve core, the piston rod can reciprocate between a retracted position away from the limit nut and an extended position close to the limit nut, an oil inlet hole is provided on the side wall of the pump core housing, and an axial through hole is provided on the limit nut. The utility model only needs to tighten the limit nut to ensure the positioning error of the valve core spring, has a simple process, is easy to operate, and can conveniently adjust the installation length of the valve core spring, which is convenient to reduce the discreteness of the pump core pressure, improve consistency and reduce the failure rate, and realize the pumping of grease efficiently and reliably. However, during the application of this technical solution, the piston rod spring is easily compressed and deflected at its two end connections when it is repeatedly extended and compressed, causing a certain bending of the spring as a whole, thereby affecting the normal extension and retraction of the piston rod and even the normal operation of the pump core. There is a technical problem that the two sides of the piston rod spring cannot be stably limited to avoid deflection during extension and compression to affect the normal operation of the pump core. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, the utility model provides a lubrication pump core, which can solve the problem that the connection between the two ends of the piston rod spring is easily compressed and deflected when it is repeatedly extended and compressed, causing a certain bending of the spring as a whole, thereby affecting the normal extension and retraction of the piston rod and even affecting the normal operation of the pump core. There is a technical problem that the two sides of the piston rod spring cannot be stably limited to avoid deflection during extension and compression, affecting the normal operation of the pump core.

[0005] To solve the above technical problems, the present utility model provides the following technical solution: A lubricating pump core, comprising a pump core main body, on one side inside the pump core main body, a piston rod is inserted. On one side of the piston rod, a connecting piece is provided. At the front end on one side inside the pump core main body, an oil outlet hole is provided. On the other side inside the pump core main body, a limit nut is provided. Inside the inner hole of the pump core main body between the limit nut and the piston rod, a valve core is provided. Inside the pump core main body between one side of the limit nut and the valve core, a valve core spring is provided. Outside the piston rod between the connecting piece and one side of the pump core main body, a piston rod spring is sleeved. On one side of the connecting piece, a first limiting piece is provided. On one side of the pump core main body, a second limiting piece is provided. The first limiting piece and the second limiting piece are annular. The inner diameter of the first limiting piece is greater than the diameter of the piston rod. The diameters of the first limiting piece and the second limiting piece are less than the inner diameter of the piston rod spring. At the edge on the other side of the pump core main body, a stable sealing assembly is provided. The stable sealing assembly includes a sealing gasket. The sealing gasket is provided outside the edge on the other side of the pump core main body. At the edge on the other side of the pump core main body, a clamping groove is provided. Inside the sealing gasket, a sealing clamping strip is provided.

[0006] As a preferred technical solution of the present utility model, on the other side inside the pump core main body, an internal thread is provided. On one side outside the pump core main body, an external thread is provided.

[0007] As a preferred technical solution of the present utility model, the sealing gasket, the clamping groove and the sealing clamping strip are annular. The sealing clamping strip is clamped into the inside of the clamping groove.

[0008] Compared with the prior art, the beneficial effects that the present utility model can achieve are:

[0009] 1. By providing the first limiting piece and the second limiting piece, during use, by arranging the first limiting piece between one side of the connecting piece, outside the piston rod and inside the piston rod spring, the side of the piston rod spring connected to the connecting piece can be limited. When the piston rod drives the piston rod spring to be compressed and deformed, the side in contact with the connecting piece is deflected and bent. Similarly, the other side of the piston rod spring is limited and stabilized by the second limiting piece, so as to ensure that the piston rod spring is normally and stably compressed and extended to drive the piston rod to reset and ensure the normal operation of the pump core.

[0010] 2. By providing a stable sealing assembly at the edge on the other side of the pump core main body, during use, by clamping the annular sealing clamping strip provided inside the sealing gasket into the annular clamping groove provided at the edge on the other side of the pump core main body, the purpose of stably fitting the sealing gasket on the other side of the pump core main body can be achieved, thereby avoiding the offset of the sealing gasket during the installation of the pump core main body and affecting the sealing effect, and at the same time avoiding the loosening of the sealing gasket, thereby further improving the sealing effect of the pump core and having strong feasibility. Description of the Drawings

[0011] Figure 1 is a three - dimensional structure schematic diagram of the present utility model;

[0012] Figure 2 is a front - view sectional structure schematic diagram of the present utility model;

[0013] Figure 3 is a side - view partial sectional structure schematic diagram of the pump core main body of the present utility model;

[0014] Figure 4 is of the present utility model Figure 2 enlarged structure schematic diagram at position A.

[0015] Wherein: 1. Pump core main body; 2. Oil outlet hole; 3. Piston rod spring; 4. Connecting piece; 5. First limiting piece; 6. Piston rod; 7. Sealing gasket; 8. Second limiting piece; 9. Limit nut; 10. Spool spring; 11. Spool; 12. Sealing strip; 13. Card slot. Specific embodiments

[0016] In order to make the technical means, creative features, achieved purposes and functions of the present utility model easy to understand, the present utility model will be further described below in conjunction with specific embodiments. However, the following embodiments are only the preferred embodiments of the present utility model, not all of them. Based on the embodiments in the implementation manners, other embodiments obtained by those skilled in the art without creative labor all belong to the protection scope of the present utility model. The experimental methods in the following embodiments are all conventional methods unless otherwise specified, and the materials, reagents, etc. used in the following embodiments can be obtained from commercial channels unless otherwise specified.

[0017] Embodiment

[0018] Please refer to Figures 1-4 as shown, the present utility model provides a lubricating pump core, including a pump core main body 1. There is an internal thread on the other side inside the pump core main body 1, and an external thread on one side outside the pump core main body 1. A piston rod 6 is inserted into one side inside the pump core main body 1. By pushing the piston rod 6 to move into the pump core main body 1, lubricating oil can be pumped out. There is a connecting piece 4 on one side of the piston rod 6, and a piston rod spring 3 is sleeved on the piston rod 6 between the connecting piece 4 and one side of the pump core main body 1. The elastic force of the piston rod spring 3 can push the piston rod 6 to reset. An oil outlet hole 2 is provided at the front end of one side inside the pump core main body 1. Through the oil outlet hole 2, lubricating oil can enter the pump core main body 1. A limit nut 9 is provided on the other side inside the pump core main body 1. A spool 11 is arranged in the inner hole of the pump core main body 1 between the limit nut 9 and the piston rod 6. A spool spring 10 is arranged inside the pump core main body 1 between one side of the limit nut 9 and the spool 11. By loosening or tightening the limit nut 9, the positioning error of the spool spring 10 can be adjusted;

[0019] As a further implementation manner of this embodiment, as Figure 1 , Figure 2 and Figure 3 shown, a ring-shaped first limiting piece 5 is arranged on one side of the connecting piece 4, and a ring-shaped second limiting piece 8 is arranged on one side of the pump core body 1. The inner diameter of the first limiting piece 5 is larger than the diameter of the piston rod 6, and the diameters of the first limiting piece 5 and the second limiting piece 8 are smaller than the inner diameter of the piston rod spring 3. The first limiting piece 5 can limit one side of the piston rod spring 3 connected to the connecting piece 4. When the piston rod 6 drives the piston rod spring 3 to be compressed and deformed, the side in contact with the connecting piece 4 is deflected and bent. Similarly, the other side of the piston rod spring 3 is limited and stabilized by the second limiting piece 8, so as to ensure that the piston rod spring 3 is normally and stably compressed and extended to drive the piston rod 6 to reset and ensure the normal operation of the pump core;

[0020] During use, by arranging the first limiting piece 5 between one side of the connecting piece 4, the outside of the piston rod 6 and the inside of the piston rod spring 3, one side of the piston rod spring 3 connected to the connecting piece 4 can be limited. When the piston rod 6 drives the piston rod spring 3 to be compressed and deformed, the side in contact with the connecting piece 4 is deflected and bent. Similarly, the other side of the piston rod spring 3 is limited and stabilized by the second limiting piece 8, so as to ensure that the piston rod spring 3 is normally and stably compressed and extended to drive the piston rod 6 to reset and ensure the normal operation of the pump core;

[0021] As a further implementation manner of this embodiment, as Figures 1-4 shown, a stable sealing assembly is arranged at the edge of the other side of the pump core body 1. The stable sealing assembly includes a ring-shaped sealing gasket 7. The sealing gasket 7 is arranged outside the edge of the other side of the pump core body 1. A ring-shaped clamping groove 13 is arranged at the edge of the other side of the pump core body 1. A ring-shaped sealing clamping strip 12 is arranged on the inner side of the sealing gasket 7. The sealing clamping strip 12 is clamped into the inside of the clamping groove 13, so as to achieve the purpose of stably fitting the sealing gasket 7 on the other side of the pump core body 1, thereby avoiding the offset of the sealing gasket 7 affecting the sealing effect when installing the pump core body 1, and at the same time avoiding the loosening of the sealing gasket 7, thereby further improving the sealing effect of the pump core;

[0022] Specific working principle:

[0023] When using the pump core of a lubricating pump, it is installed on the lubricating pump through the threads provided on the outer side of the pump core body 1. Subsequently, the annular sealing strip 12 provided on the inner side of the gasket 7 is snapped into the annular slot 13 provided at the other edge of the pump core body 1, so that the gasket 7 can be stably attached to the other side of the pump core body 1. The oil outlet pipeline and the pressure gauge are installed on the pump core body 1 through the internal threads provided on the inner side. The installation sealing effect is ensured through the gasket 7. When the lubricating pump works, the lubricating oil enters the inner hole of the pump core body 1 through the oil outlet hole 2. Subsequently, the piston rod 6 is compressed into the pump core body 1, and at the same time, the piston rod spring 3 is compressed. The lubricating oil is ejected through the valve core 11 and the limit nut 9 to lubricate the mechanical equipment. After the lubricating oil is ejected, the piston rod 6 is pushed back to its original position by the piston rod spring 3 to enter the next lubrication program. And by setting the first limiting piece 5 between one side of the connecting piece 4, the outer side of the piston rod 6 and the inner side of the piston rod spring 3, the one side of the piston rod spring 3 connected to the connecting piece 4 can be limited. When the piston rod 6 drives the piston rod spring 3 to be compressed and deformed, the side in contact with the connecting piece 4 is deflected and bent. Similarly, the other side of the piston rod spring 3 is limited and stabilized through the second limiting piece 8, so as to ensure that the lubricating pump continuously and stably lubricates the mechanical equipment.

[0024] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection required by the present invention is defined by the appended claims and their equivalents.

Claims

1. A lubrication pump core, comprising a pump core body (1), characterized in that: A piston rod (6) is inserted into one side of the pump core body (1), a connecting piece (4) is provided on one side of the piston rod (6), an oil outlet hole (2) is provided at the front end of one side of the pump core body (1), a limiting nut (9) is provided on the other side of the pump core body (1), a valve core (11) is provided in the inner hole of the pump core body (1) between the limiting nut (9) and the piston rod (6), a valve core spring (10) is provided in the pump core body (1) between one side of the limiting nut (9) and the valve core (11), a piston rod spring (3) is provided on the outer sleeve of the piston rod (6) between the connecting piece (4) and one side of the pump core body (1), and a first limiting nut (4) is provided on one side of the connecting piece (4). A plate (5), a second limiting plate (8) is arranged on one side of the pump core body (1), the first limiting plate (5) and the second limiting plate (8) are annular, the inner diameter of the first limiting plate (5) is larger than the diameter of the piston rod (6), the diameter of the first limiting plate (5) and the diameter of the second limiting plate (8) are smaller than the inner diameter of the piston rod spring (3), a stabilizing sealing component is arranged at the edge of the other side of the pump core body (1), the stabilizing sealing component comprises a sealing gasket (7), the sealing gasket (7) is arranged on the outer side of the edge of the other side of the pump core body (1), a card groove (13) is arranged at the edge of the other side of the pump core body (1), and a sealing card strip (12) is arranged on the inner side of the sealing gasket (7).

2. A lubrication pump core according to claim 1, characterized in that: The other side of the pump core body (1) is provided with an internal thread, and the side of the pump core body (1) is provided with an external thread.

3. A lubrication pump core according to claim 1, characterized in that: The sealing pad (7), the card slot (13) and the sealing card strip (12) are annular in shape, and the sealing card strip (12) is card-engaged in the interior of the card slot (13).

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