Lubricating pump

Abstract

The utility model discloses a lubricating pump which comprises a front pump body, a middle pump body and a rear pump body, the front pump body, the middle pump body and the rear pump body are sequentially connected in a sealed mode, a rotating shaft is connected between the front pump body and the rear pump body through a needle bearing, the input end of the rotating shaft is located on the outer side of the front pump body, and a liquid pump inner rotor is fixed to the outer side of the part, located on the middle pump body, of the rotating shaft. A liquid pump outer rotor which is rotatably connected is arranged in the middle pump body, the liquid pump outer rotor and the liquid pump inner rotor are matched with each other, two cavities which are communicated up and down are formed in the rear pump body, longitudinal holes which are communicated with an inlet and an outlet of the middle pump body are formed in the middles of the two cavities respectively, and two one-way valves are arranged in each cavity. According to the lubricating pump, the structure is simple, operation is easy and convenient, oil can be automatically conveyed when the oil pressure of an inlet is large, oil can be conveyed through the pump body when the oil pressure is too small, electric energy can be saved, and convenience is provided for people.

Description

Technical Field

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

[0002] In order to ensure the continuous and stable operation of the mechanism in the mechanical system, the various parts that cooperate with each other in the mechanism must be fully and effectively lubricated. Therefore, a lubrication supply device needs to be set up in the system, and a lubrication pump needs to be provided for oil supply. However, the existing lubrication pump has a complex structure and needs to work all the time during operation, so it consumes a lot of electricity and is inconvenient to use. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the existing defects and provide a lubrication pump with a simple structure and easy operation. When the inlet oil pressure is too high, the oil can be automatically transported, and when the oil pressure is too low, the oil can be transported through the pump body, which can save electric energy, provide convenience for people, and effectively solve the problems in the background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a lubrication pump, comprising a front pump body, a middle pump body and a rear pump body, wherein the front pump body, the middle pump body and the rear pump body are sealed and connected in sequence, a rotating shaft is connected between the front pump body and the rear pump body through a needle bearing, the input end of the rotating shaft is located on the outside of the front pump body, and a liquid pump inner rotor is fixed on the outside of the rotating shaft located on the middle pump body, a liquid pump outer rotor connected in rotation is arranged inside the middle pump body, and the liquid pump outer rotor and the liquid pump inner rotor cooperate with each other, two cavities connected up and down on the rear pump body, longitudinal holes connected to the inlet and outlet of the middle pump body are respectively arranged in the middle of the two cavities, two one-way valves are arranged inside each cavity, plugs are arranged on the upper and lower sides of the left cavity and the lower end of the right cavity, and a pressure block is arranged between the plug and the one-way valve, an oil inlet is arranged on the upper end of the right cavity, and the oil inlet is connected to the upper ends of the two cavities, and an oil outlet connected to the lower ends of the two cavities is arranged on one side of the rear pump body.

[0005] Furthermore, a shaft seal cover is fixed at the connection between the front pump body and the rotating shaft by screws, and an oil seal is provided between the shaft seal cover and the front pump body. The shaft seal cover and the oil seal can achieve better sealing performance between the front pump body and the rotating shaft.

[0006] Furthermore, a pressure measuring port is provided on one side of the rear pump body, and the pressure measuring port is connected to the oil outlet. A pressure measuring device can be connected through the pressure measuring port, so as to facilitate the detection of the hydraulic pressure at the oil outlet position.

[0007] Furthermore, the plug is connected to the rear pump body by a threaded connection, and the plug is a convex structure, and a rubber sealing ring is provided between the plug and the rear pump body, so that the plug and the rear pump body are more tightly connected by the rubber sealing ring.

[0008] Compared with the prior art, the utility model has the following beneficial effects: the connection between the front pump body and the rotating shaft can be better sealed by the shaft seal cover and the oil seal, the pressure measuring device can be connected through the pressure measuring port, so as to facilitate the detection of the hydraulic pressure at the oil outlet position, and the plug is more tightly connected to the rear pump body through the rubber sealing ring. When the oil pressure at the oil inlet is large, the oil first enters the cavity through the two one-way valves at the upper end, and then passes through the two one-way valves at the lower end and finally exits from the oil outlet. When the oil pressure at the oil inlet is small, the rotating shaft is driven to rotate by an external drive, and the rotation of the rotating shaft can drive the inner rotor and the outer rotor of the liquid pump to rotate. The oil in the right cavity can be extracted into the left cavity by the cooperation of the inner rotor and the outer rotor of the liquid pump. When the oil pressure inside the left cavity is too large, the oil is finally discharged from the oil outlet through the one-way valve at the lower end. The lubrication pump has a simple structure and is easy to operate. When the inlet oil pressure is large, the oil can be automatically transported, and when the oil pressure is too small, the oil can be transported through the pump body, which can save electric energy and provide convenience for people. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the structure of the utility model;

[0010] Figure 2 It is a schematic diagram of the longitudinal section structure of the utility model.

[0011] In the figure: 1 front pump body, 2 middle pump body, 3 rear pump body, 4 rotating shaft, 5 liquid pump inner rotor, 6 liquid pump outer rotor, 7 shaft sealing cover, 8 oil seal, 9 cavity, 10 one-way valve, 11 plug, 12 pressure block, 13 oil inlet, 14 oil outlet, 15 pressure measuring port. DETAILED DESCRIPTION

[0012] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0013] See also Figure 1-2The utility model provides a technical solution: a lubrication pump, including a front pump body 1, a middle pump body 2 and a rear pump body 3, the front pump body 1, the middle pump body 2 and the rear pump body 3 are sealed and connected in sequence, a rotating shaft 4 is connected between the front pump body 1 and the rear pump body 3 through a needle bearing, the input end of the rotating shaft 4 is located on the outside of the front pump body 1, and a liquid pump inner rotor 5 is fixed on the outside of the rotating shaft 4 located on the middle pump body 2. A liquid pump outer rotor 6 connected in rotation is arranged inside the middle pump body 2, and the liquid pump outer rotor 6 and the liquid pump inner rotor 5 cooperate with each other. The rear pump body 3 has two cavities 9 that communicate with each other up and down, and the two cavities 9 The middle of the chamber 9 is provided with longitudinal holes connected to the inlet and outlet of the middle pump body 2, and each chamber 9 is provided with two one-way valves 10. The upper and lower sides of the left chamber 9 and the lower end of the right chamber 9 are provided with plugs 11, and a pressure block 12 is provided between the plug 11 and the one-way valve 10. The upper end of the right chamber 9 is provided with an oil inlet 13, and the oil inlet 13 is connected to the upper ends of the two chambers 9. One side of the rear pump body 3 is provided with an oil outlet 14 connected to the lower ends of the two chambers 9. The connection between the front pump body 1 and the rotating shaft 4 is fixed with a shaft seal cover 7 by screws, and the shaft seal cover 7 and the front pump body 1 are connected. An oil seal 8 is provided between the shaft seal cover 7 and the oil seal 8, and a better sealing performance can be achieved between the front pump body 1 and the rotating shaft 4. A pressure measuring port 15 is provided on one side of the rear pump body 3, and the pressure measuring port 15 is communicated with the oil outlet 14. The pressure measuring device can be connected through the pressure measuring port 15, so as to facilitate the detection of the hydraulic pressure at the oil outlet 14. The plug 11 is connected to the rear pump body 3 by a threaded connection, and the plug 11 is a convex structure, and a rubber sealing ring is provided between the plug 11 and the rear pump body 3, and the rubber sealing ring makes the plug 11 and the rear pump body 3 more tightly connected. When the oil pressure at the oil port 13 is low, the rotating shaft 4 is driven externally to rotate, and the rotation of the rotating shaft 4 can drive the inner rotor 5 and the outer rotor 6 of the liquid pump to rotate. The oil in the right cavity 9 can be extracted into the left cavity 9 through the cooperation of the inner rotor 5 and the outer rotor 6 of the liquid pump. When the oil pressure inside the left cavity 9 is too high, it passes through the one-way valve 10 at the lower end and is finally discharged from the oil outlet 14. The lubrication pump has a simple structure and is easy to operate. When the inlet oil pressure is high, the oil can be automatically transported, and when the oil pressure is too low, the oil can be transported through the pump body, which can save electric energy and provide convenience for people.

[0014] During use: the shaft seal cover 7 and the oil seal 8 can achieve better sealing between the front pump body 1 and the rotating shaft 4, and the pressure measuring device can be connected through the pressure measuring port 15, so as to facilitate the detection of the hydraulic pressure at the oil outlet 14 position, and the rubber sealing ring makes the plug 11 and the rear pump body 3 more tightly connected. When the oil pressure at the oil inlet 13 is high, the oil first enters the cavity 9 through the two one-way valves 10 at the upper end, and then passes through the two one-way valves 10 at the lower end and finally out of the oil outlet 14. When the oil pressure at the oil inlet 13 is low, the rotating shaft 4 is driven to rotate by an external drive, and the rotation of the rotating shaft 4 can drive the inner rotor 5 and the outer rotor 6 of the liquid pump to rotate. The oil in the right cavity 9 can be extracted into the left cavity 9 by the cooperation of the inner rotor 5 and the outer rotor 6 of the liquid pump. When the oil pressure inside the left cavity 9 is too high, it passes through the one-way valve 10 at the lower end and is finally discharged from the oil outlet 14.

[0015] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention.

Claims

1. A lubrication pump, comprising a front pump body (1), a middle pump body (2) and a rear pump body (3), wherein the front pump body (1), the middle pump body (2) and the rear pump body (3) are sealed and connected in sequence. Features: A rotating shaft (4) is connected between the front pump body (1) and the rear pump body (3) via a needle bearing. The input end of the rotating shaft (4) is located outside the front pump body (1). A liquid pump inner rotor (5) is fixed outside the portion of the rotating shaft (4) located at the middle pump body (2). A liquid pump outer rotor (6) is rotatably connected to the inside of the middle pump body (2). The liquid pump outer rotor (6) and the liquid pump inner rotor (5) cooperate with each other. Two cavities (9) are connected to each other from top to bottom on the rear pump body (3). The middle of the two cavities (9) are respectively provided with an inlet port for connecting to the middle pump body (2). A longitudinal hole is provided to communicate with an inlet and an outlet, two one-way valves (10) are provided inside each cavity (9), plugs (11) are provided on the upper and lower sides of the left cavity (9) and the lower end of the right cavity (9), and a pressure block (12) is provided between the plug (11) and the one-way valve (10), an oil inlet (13) is provided at the upper end of the right cavity (9), and the oil inlet (13) is communicated with the upper ends of the two cavities (9), and an oil outlet (14) is provided on one side of the rear pump body (3) and is communicated with the lower ends of the two cavities (9).

2. A lubrication pump according to claim 1, Features: A shaft seal cover (7) is fixed to the connection between the front pump body (1) and the rotating shaft (4) by means of screws, and an oil seal (8) is provided between the shaft seal cover (7) and the front pump body (1).

3. A lubrication pump according to claim 1, Features: A pressure measuring port (15) is provided on one side of the rear pump body (3), and the pressure measuring port (15) is communicated with the oil outlet (14).

4. A lubrication pump according to claim 1, Features: The plug (11) is connected to the rear pump body (3) by means of a threaded connection, the plug (11) is a convex structure, and a rubber sealing ring is provided between the plug (11) and the rear pump body (3).

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