Axial plunger oil feeding pump

Abstract

The utility model relates to the technical field of lubricating oil pumps, in particular to an axial plunger oil feeding pump which comprises a pump body, an oil conveying pipe and a space cam. An upper chamber b1 and a lower chamber b2 are formed between the pump body and the piston; a hollow hole channel is formed in the piston and communicates with a notch in the surface of the piston to form a cavity a. A space cam is arranged on the rear side of the pump body, and a spiral groove is formed in the surface of the space cam. A steel sleeve is assembled in the groove, and a threaded pin is arranged in the center of the steel sleeve; the other end of the threaded pin is connected with the piston; a rotating main shaft is assembled in the center of the space cam in a key connection manner; the upper part of the space cam is connected with an oil-conveying pipe through a connecting sleeve; a transmission shaft is arranged in the oil-conveying pipe; a coupler is arranged on the outer side of the transmission shaft; the rotating main shaft is connected with the transmission shaft; the grease suction device can directly suck grease from commodity barreled grease to be supplied to a lubricating pump for use, is large in flow, long in service life, stable in transmission and easy to install, and meets various application occasions.

Description

Technical Field

[0001] The utility model relates to the technical field of lubricating oil pumps, in particular to an axial plunger oil pump. Background Art

[0002] As a key structure of the lubrication system in various mechanical equipment, lubricating oil pumps are widely used in industrial equipment such as engineering machinery, construction machinery, and agricultural machinery. Usually, lubricating pumps are driven by compressed air, have high operating noise, require a dedicated power source, require special personnel to be on duty during operation, and the operation preparation and completion work are cumbersome and complicated. The grease injection efficiency is low and cannot meet the application safety and production efficiency requirements. Utility Model Content

[0003] The purpose of the present application is to provide an axial piston oil pump, aiming to solve the problems in the prior art.

[0004] The embodiment of the present application provides an axial piston oil pump, including a pump body, an oil delivery pipe and a space cam; the pump body is located at the bottom of the oil pump, and a piston is arranged inside the pump body; two upper and lower chambers are formed between the pump body and the piston, namely an upper chamber b1 and a lower chamber b2; the interior of the piston is a hollow channel, and the channel is connected with the groove on the surface of the piston to form a chamber a; a one-way valve is arranged in the channel, and the one-way valve is composed of two upper and lower symmetrical vertebrae connected by compression spring supports; a vertical oil delivery channel d is arranged on the right side of the pump body, and the chamber a is connected to the oil delivery channel d; a pressure relief valve is arranged at the bottom of the oil delivery channel d; the pressure relief valve The structure is that a compression spring is connected to the bottom of a metal cone head; a pressure relief hole is provided on the pump body on the right side of the pressure relief valve; a space cam is provided on the rear side of the pump body, and a spiral groove is provided on the surface of the space cam; a steel sleeve is installed in the groove, and a threaded pin is provided in the center of the steel sleeve; the other end of the threaded pin is connected to the piston; a rotating main shaft is provided in the center of the space cam, and the two are assembled and set by a key connection; the upper part of the space cam is connected to the oil pipeline through a connecting sleeve; a transmission shaft is provided in the center of the oil pipeline; a coupling is provided on the outside of the transmission shaft, and a spring is provided between the two to form a floating connection; the rotating main shaft is connected to the transmission shaft and the coupling.

[0005] Furthermore, an upper cover is provided on the upper part of the pump body; a transverse oil delivery channel e is formed between the upper cover and the pump body; a chamber f is formed between the upper cover and the connecting sleeve; one end of the chamber e is connected to the oil delivery channel d, and the other end is connected to the chamber f.

[0006] Furthermore, a chamber c is formed between the oil delivery pipe and the transmission shaft, and the chamber c is communicated with the chamber f.

[0007] Furthermore, an oil inlet is provided on the front side of the pump body, and a follower bearing is provided on the front side of the piston. The front end of the follower bearing extends into the oil inlet and is slidably connected to the oil inlet.

[0008] The beneficial effects of the utility model are as follows: the utility model adopts electric drive, and can also be applied to hydraulic drive and compressed air drive. It can directly draw grease from commercial barrels of grease to supply the lubrication pump for use. It has stable transmission, small size, stable flow, simple installation, convenient operation, and meets various application occasions. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is the front view of the utility model.

[0010] Figure 2 It is a top view of the utility model.

[0011] Figure 3 It is the right view of the utility model.

[0012] Figure 4 Schematic diagram of the space cam structure.

[0013] Figure 5 Schematic diagram of the AA cross-section structure in state 1.

[0014] Figure 6 Schematic diagram of the AA cross-section structure in state two.

[0015] Figure 7 This is a schematic diagram of the structure at H.

[0016] Figure 8 It is a schematic diagram of the BB cross-section structure.

[0017] Fig. 9 Schematic diagram of CC cross-section structure in state 1.

[0018] Fig.10 Schematic diagram of CC cross-section structure in state 2.

[0019] Fig.11 It is a schematic diagram of the CC cross-section structure under pressure relief state.

[0020] In the figure:

[0021] 1. Oil pipeline; 33. Oil inlet; 35. Pressure relief hole; 2. Coupling; 5. Spring; 7. Transmission shaft; 8. Connecting sleeve; 12. Upper cover; 16. Rotating main shaft; 18. Spatial cam; 27. Pump body; 34. Groove; 29. ​​Cone head; 20. Cone tip; 22. Steel sleeve; 23. Threaded pin; 25. Piston; 26. Follower bearing; 30. Compression spring; 35. Pressure relief hole; 36. Notch on the piston surface. DETAILED DESCRIPTION

[0022] 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.

[0023] like Figures 1 to 11 An axial piston oil pump shown in the figure comprises a pump body 27, an oil delivery pipe 1 and a space cam 18; the pump body 27 is located at the bottom of the oil pump, and a piston 25 is arranged in the pump body 27; two upper and lower chambers are formed between the pump body 27 and the piston 25, namely an upper chamber b1 and a lower chamber b2; the interior of the piston 25 is a hollow channel, and the channel is connected with a notch 36 on the surface of the piston to form a chamber a; a one-way valve is arranged in the channel, and the one-way valve is composed of two upper and lower symmetrical cone tips 20 supported and connected by a compression spring 30; a vertical oil delivery channel d is arranged on the right side of the pump body 27, and the chamber a is connected to the oil delivery channel d; a pressure relief valve is arranged at the bottom of the oil delivery channel d; the pressure relief valve structure is that the bottom of the metal cone head 29 is connected to the compression spring 30; a pressure relief hole 35 is arranged on the pump body 27 on the right side of the pressure relief valve; A space cam 18 is provided on the rear side of the pump body 27, and a spiral groove 34 is provided on the surface of the space cam 18; a steel sleeve 22 is installed in the groove 34, and a threaded pin 23 is provided in the center of the steel sleeve 22; the other end of the threaded pin 23 is connected to the piston 25; a rotating main shaft 16 is provided in the center of the space cam 18, and the two are assembled and arranged by a key connection; the key connection can realize that when the rotating main shaft 16 rotates, the external cam rotates at the same time; the upper part of the space cam 18 is connected to the oil pipeline 1 through a connecting sleeve 8; a transmission shaft 7 is provided in the center of the oil pipeline 1; a coupling 2 is provided on the outer side of the transmission shaft 7, and a spring 5 is provided between the two to form a floating connection; this arrangement can provide coaxiality tolerance between the driving device and the transmission shaft 7, and at the same time provide overload protection; the rotating main shaft 16 is connected to the transmission shaft 7.

[0024] An upper cover 12 is provided on the upper part of the pump body 27; a transverse oil delivery channel e is formed between the upper cover 12 and the pump body 27; a chamber f is formed between the upper cover 12 and the connecting sleeve 8; one end of the chamber e is connected to the oil delivery channel d, and the other end is connected to the chamber f.

[0025] A chamber c is formed between the oil delivery pipe 1 and the transmission shaft, and the chamber c is communicated with the chamber f.

[0026] An oil inlet 33 is provided on the front side of the pump body 27, and a follower bearing 26 is provided on the front side of the piston 25. The front end of the follower bearing 26 extends into the oil inlet 33 and is slidably connected to the oil inlet 33. The follower bearing 26 has a limiting and guiding function when the piston 25 moves, which can prevent the piston 25 from rotating and ensure that the piston 25 moves in a straight line.

[0027] When the device is working, the entire pump body 27 is immersed in grease, the external driving device is connected to the coupling 2, the rotating main shaft 16 is driven to rotate through the transmission shaft 7, and the space cam 18 is also driven to rotate, so that the steel sleeve 22 and the threaded pin 23 slide in the groove 34 on the surface of the space cam 18, and the piston 25 is driven to reciprocate up and down, forming two oil suction states; state one is that when the piston 25 moves downward, the chamber b2 is squeezed by the piston 25, and the internal pressure of the chamber b2 increases, pushing the one-way valve in the piston 25 to overcome the thrust of the compression spring 30 and move upward, so that the chamber b2 is connected with the chamber a, and the grease circulation order is chamber b2→chamber a→oil delivery channel d→oil delivery channel e→chamber f→chamber c, and then it is delivered to the supporting equipment, and at the same time, the chamber b1 is generated due to the downward movement of the piston 25 Negative pressure, when the piston 25 moves to the bottom of the pump body 27, the chamber b1 is connected to the oil inlet 33, and the external grease is sucked into the chamber b1; state two is when the piston 25 moves upward, the chamber b1 is squeezed by the piston 25, and the internal pressure of the chamber b1 increases, pushing the one-way valve in the piston 25 to overcome the thrust of the compression spring 30 and move downward, so that the chamber b1 is connected with the chamber a, and the grease circulation order is chamber b1→chamber a→oil delivery channel d→oil delivery channel e→chamber f→chamber c, and then transported to the supporting equipment. At the same time, the chamber b2 generates negative pressure due to the upward movement of the piston 25. When the piston 25 moves to the top of the pump body 27, the chamber b2 is connected to the oil inlet 33, and the external grease is sucked into the chamber b2; after the external driving device is started, the pump body 27 continues to cycle alternately in the two states to complete the oil suction work.

[0028] When the oil circuits in the two oil suction states are blocked, the pressure in the oil circuit gradually increases to the discharge value, and the pressure relief valve is pressed down under the action of the oil pressure, so that the oil delivery channel d is connected to the pressure relief hole 35, and the grease flows out of the pressure relief hole 35 to complete the pressure relief operation.

[0029] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. An axial piston oil pump, characterized in that: It includes a pump body, an oil delivery pipe and a space cam; the pump body is located at the bottom of the oil pump, and a piston is arranged in the pump body; two upper and lower chambers are formed between the pump body and the piston, namely the upper chamber b1 and the lower chamber b2; the interior of the piston is a hollow channel, and the channel is connected with the notch on the surface of the piston to form a chamber a; a one-way valve is arranged in the channel, and the one-way valve is composed of two upper and lower symmetrical vertebrae connected by compression spring support; a vertical oil delivery channel d is arranged on the right side of the pump body, and the chamber a is connected with the oil delivery channel d; a pressure relief valve is arranged at the bottom of the oil delivery channel d; the pressure relief valve structure is a metal cone head A compression spring is connected to the bottom; a pressure relief hole is provided on the pump body on the right side of the pressure relief valve; a space cam is provided on the rear side of the pump body, and a spiral groove is provided on the surface of the space cam; a steel sleeve is installed in the groove, and a threaded pin is provided in the center of the steel sleeve; the other end of the threaded pin is connected to the piston; a rotating main shaft is provided in the center of the space cam, and the two are assembled and set by a key connection; the upper part of the space cam is connected to the oil pipeline through a connecting sleeve; a transmission shaft is provided in the center of the oil pipeline; a coupling is provided on the outside of the transmission shaft, and a spring is provided between the two to form a floating connection; the rotating main shaft is connected to the transmission shaft.

2. The axial piston oil pump according to claim 1, characterized in that: An upper cover is provided on the upper part of the pump body; a transverse oil delivery channel e is formed between the upper cover and the pump body; a chamber f is formed between the upper cover and the connecting sleeve; one end of the chamber e is connected to the oil delivery channel d, and the other end is connected to the chamber f.

3. The axial piston oil pump according to claim 1, characterized in that: A chamber c is formed between the oil delivery pipe and the transmission shaft, and the chamber c is communicated with the chamber f.

4. The axial piston oil pump according to claim 1, characterized in that: An oil inlet is arranged on the front side of the pump body, and a follower bearing is arranged on the front side of the piston. The front end of the follower bearing extends into the oil inlet and is slidably connected with the oil inlet.

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