Plunger oil pump and hydraulic system
By designing a simplified plunger oil pump structure, including pump body, rotor, bearing and multiple plungers, the problems of difficult production and assembly and space occupation in the prior art are solved, and a simpler production process and more efficient space utilization are achieved.
Patent Information
- Application Number
- CN202421906544.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-07
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-08-07
AI Technical Summary
Existing plunger oil pumps are difficult to produce and assemble, and require swash plates and bent shaft components that occupy the inner space of the pump body.
A plunger oil pump is designed, which includes a pump body, a rotor, a bearing and a plurality of plungers. The cylinder part of the rotor is provided with a plurality of plunger holes, and the bearing sleeve is arranged on the outside of the cylinder part, which simplifies the structure and saves space.
The simple structure of bearings and rotor is realized, reducing production and assembly difficulties, and saving space inside the pump body.
Smart Images
Figure CN223035186U_ABST
Abstract
Description
Technical Field
[0001] Embodiments of the present disclosure generally relate to the field of hydraulic technology, and in particular, to a piston oil pump and a hydraulic system. Background Art
[0002] A piston oil pump utilizes a piston to reciprocate within a pump cylinder, thereby changing the working volume to achieve oil suction and discharge. The piston oil pump has the characteristics of a compact structure, a large flow rate, a high pressure, a high efficiency, and convenient use, and is widely used in the engineering field. In some conventional piston oil pumps, components such as a swash plate and a bent shaft need to be provided within the pump body of the oil pump. The swash plate and the bent shaft are difficult to produce and assemble, and will occupy some space within the housing. Summary of the Utility Model
[0003] The purpose of the embodiments of the present disclosure is to provide a piston oil pump and a hydraulic system to at least partially solve the above problems and other potential problems.
[0004] In a first aspect of the present disclosure, a piston oil pump is provided. The piston oil pump includes: a pump body including a receiving groove, a first shaft hole, and two first flow holes. The receiving groove is provided on one side of the pump body, the first shaft hole is provided at the bottom of the receiving groove, and the two first flow holes are respectively communicated with the first shaft hole; a end cover coupled to the pump body at the opening of the receiving groove, and the end cover includes a second shaft hole; a rotor including a driving portion and a cylinder portion. The driving portion is rotatably provided within the second shaft hole, the cylinder portion is provided within the receiving groove and is coupled to the driving portion. A third shaft hole is provided at the center of the cylinder portion, and a plurality of piston holes are provided along the radial direction of the cylinder portion; a bearing sleeved outside the cylinder portion and coupled to the inner wall of the receiving groove. The central axis of the bearing is spaced apart from the central axis of the cylinder portion; a plurality of pistons respectively inserted into the plurality of piston holes and abutted against the inner ring of the bearing; and a central shaft including a first shaft segment and a second shaft segment. The first shaft segment is fixed within the first shaft hole, the second shaft segment is inserted into the third shaft hole. Two oil passages arranged side by side along the axial direction are provided within the central shaft. Two second flow holes are provided on the first shaft segment, and the two second flow holes are respectively communicated with the two oil passages and the corresponding first flow holes on the corresponding side. Two distribution holes are provided on the second shaft segment. The two distribution holes are respectively communicated with the two oil passages, and the two distribution holes can be separated from or communicated with the piston holes during the rotation of the cylinder portion.
[0005] In some embodiments, the pump body further includes two groups of overflow holes respectively communicated with the two first flow holes, and the piston oil pump further includes: two groups of overflow valves respectively coupled to the two groups of overflow holes.
[0006] In some embodiments, the pump body further includes an oil inlet hole which communicates with the accommodating groove, and the plunger oil pump further includes: a fuel tank which is coupled to the pump body on one side of the pump body, and the fuel tank is sleeved outside the two overflow valves, and the fuel tank communicates with the accommodating groove via the oil inlet hole.
[0007] In some embodiments, the plunger oil pump further includes: two tubing connectors which are respectively coupled to the two first flow holes.
[0008] In some embodiments, the plunger oil pump further includes: a driving assembly which is arranged on the side of the end cover away from the pump body and is coupled to the driving part.
[0009] In some embodiments, the driving assembly includes: a rocker which is coupled to the driving part; and a crank which is coupled to one end of the rocker away from the driving part.
[0010] In some embodiments, the plunger oil pump further includes: a skeleton oil seal which is sleeved outside the driving part and is coupled to the inner wall of the second shaft hole.
[0011] In some embodiments, the plunger oil pump further includes: a first sealing ring which is coupled to the pump body and the end cover; and a second sealing ring which is arranged in the first shaft hole and is sleeved outside the central shaft.
[0012] In some embodiments, the plunger oil pump further includes: a backing plate which is arranged on the side of the cylinder block away from the end cover and abuts against the bottom of the accommodating groove, and the backing plate includes a fourth shaft hole which is adapted for the central shaft to be inserted therein.
[0013] In some embodiments, the plunger oil pump further includes: a fixing assembly which is coupled to the end cover and is adapted to fix the plunger oil pump to a position for user operation.
[0014] In some embodiments, the fixing assembly includes: a main board which is coupled to the end cover on the side of the end cover away from the pump body, and the main board includes a through hole which is adapted for the driving part to be inserted therein; a pressing plate which is arranged on one side of the main board; and a locking member which is coupled to the main board and the pressing plate, and the locking member clamps the plunger oil pump to a position for user operation by adjusting the distance between the pressing plate and the main board.
[0015] In a second aspect of the present disclosure, there is provided a hydraulic system. The hydraulic system includes: a hydraulic transmission assembly having a liquid inlet and a liquid outlet; and the plunger oil pump of the first aspect of the present disclosure, and the two second flow holes of the plunger oil pump are respectively communicated with the liquid inlet and the liquid outlet.
[0016] In some embodiments, the hydraulic transmission assembly includes a switch traction assembly.
[0017] In an embodiment of the present disclosure, a plunger oil pump includes a pump body, an end cover, a rotor, a bearing, a central shaft, and a plurality of plungers. The pump body includes a receiving groove, a first shaft hole, and two first flow holes. The receiving groove is provided on one side of the pump body. The first shaft hole is provided at the bottom of the receiving groove, and the two first flow holes communicate with the first shaft hole respectively. The end cover is coupled to the pump body at the opening of the receiving groove, and the end cover includes a second shaft hole. The rotor includes a driving portion and a cylinder portion. The driving portion is rotatably provided in the second shaft hole. The cylinder portion is provided in the receiving groove and is coupled to the driving portion. A third shaft hole is provided at the center of the cylinder portion, and a plurality of plunger holes are provided in the cylinder portion along the radial direction. The plurality of plunger holes communicate with the third shaft hole. The bearing is sleeved on the outer side of the cylinder portion and is coupled to the inner wall of the receiving groove. The central axis of the bearing is spaced apart from the central axis of the cylinder portion. The plurality of plungers are respectively inserted into the plurality of plunger holes and abut against the inner ring of the bearing. The central shaft includes a first shaft section and a second shaft section. The first shaft section is fixed in the first shaft hole, and the second shaft section is inserted into the third shaft hole. Two oil passages arranged in parallel along the axial direction are provided in the central shaft. Two second flow holes are provided in the first shaft section, and the two second flow holes communicate with the two oil passages and the corresponding first flow holes on each side respectively. Two distribution holes are provided in the second shaft section, and the two distribution holes communicate with the two oil passages respectively. The two distribution holes can be separated from or communicated with the plunger holes during the rotation of the cylinder portion. With this arrangement, the rotor can extract the hydraulic oil in one oil passage in the central shaft and deliver the hydraulic oil to the other oil passage in the central shaft during rotation, thereby efficiently driving the flow of the hydraulic oil. At the same time, the bearing is sleeved on the outer side of the cylinder portion of the rotor, and the structure of the bearing and the rotor is simple, which is convenient for production and assembly and helps to save the space inside the pump body.
[0018] It should be understood that the content described in this part is not intended to define the key features or important features of the embodiments of the present disclosure, nor is it used to limit the scope of the present disclosure. Other features of the present disclosure will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In combination with the accompanying drawings and with reference to the following detailed description, the above and other features, advantages, and aspects of the embodiments of the present disclosure will become more apparent. In the drawings, the same or similar reference numerals denote the same or similar elements, where:
[0020] Figure 1 shows a perspective view of the plunger oil pump according to an embodiment of the present disclosure;
[0021] Figure 2 shows a right view of the plunger oil pump according to an embodiment of the present disclosure;
[0022] Figure 3 shows Figure 2 a cross-sectional view taken along line A-A of
[0023] Figure 4 showsFigure 2 Cross-sectional view taken along line B-B;
[0024] Figure 5 Shows an exploded view of the plunger oil pump according to an embodiment of the present disclosure, in which the oil inlet hole is shown;
[0025] Figure 6 Shows an exploded view of the plunger oil pump according to an embodiment of the present disclosure, in which the receiving groove is shown;
[0026] Figure 7 Shows a perspective view of the central shaft according to an embodiment of the present disclosure;
[0027] Figure 8 Shows a cross-sectional view of the central shaft according to an embodiment of the present disclosure; and
[0028] Figure 9 Shows a perspective view of the plunger oil pump according to an embodiment of the present disclosure, in which the drive assembly and the fixing assembly are shown.
[0029] Description of reference numerals:
[0030] 100, plunger oil pump;
[0031] 10, pump body; 11, receiving groove; 12, first shaft hole; 13, first flow-through hole; 14, overflow hole; 15, overflow valve; 16, oil inlet hole; 17, tubing joint;
[0032] 20, end cover; 21, second shaft hole;
[0033] 30, rotor; 31, drive part; 32, cylinder part; 321, third shaft hole; 322, plunger hole;
[0034] 40, bearing;
[0035] 51, plunger; 52, elastic member;
[0036] 60, central shaft; 61, first shaft section; 62, second shaft section; 63, oil passage; 64, second flow-through hole; 65, distribution hole;
[0037] 71, fuel tank; 72, skeleton oil seal; 73, first sealing ring; 74, second sealing ring; 75, backing plate; 750, fourth shaft hole;
[0038] 80, drive assembly; 81, rocker; 82, rocker handle;
[0039] 90, fixing assembly; 91, main board; 910, through hole; 92, pressing plate; 920, notch; 93, locking member;
[0040] 200, tubing. Detailed implementation manners
[0041] Preferred embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the preferred embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure will be more thorough and complete, and can fully convey the scope of the present disclosure to those skilled in the art.
[0042] As used herein, the term "comprising" and its variations mean open inclusion, i.e., "including but not limited to". Unless otherwise specified, the term "or" means "and / or". The term "based on" means "at least partially based on". The terms "an exemplary embodiment" and "an embodiment" mean "at least one exemplary embodiment". The term "another embodiment" means "at least one additional embodiment". The terms "first", "second", etc. may refer to different or the same objects.
[0043] As described above, in some conventional plunger oil pumps, it is necessary to provide components such as a swash plate and a bent shaft inside the pump housing. The swash plate and the bent shaft are difficult to produce and assemble, and will occupy some space inside the housing.
[0044] Embodiments of the present disclosure provide a plunger oil pump and a hydraulic system. In this plunger oil pump, a rotor, a bearing, and a plurality of plungers are provided. A plurality of plunger holes are provided in the cylinder block portion of the rotor, and the plurality of plungers are respectively inserted into the plurality of plunger holes. The bearing is sleeved outside the cylinder block portion, and the central axis of the bearing is spaced apart from the central axis of the cylinder block portion. With this arrangement, the structure of the bearing and the rotor is simple, the production and assembly are relatively convenient, and it helps to save the space inside the pump body. The principle of the present disclosure will be described in detail below in conjunction with Figures 1 to 9 to describe the principle of the present disclosure in detail.
[0045] As Figures 1 to 6 shown, the plunger oil pump 100 includes a pump body 10, an end cover 20, a rotor 30, a bearing 40, a central shaft 60, and a plurality of plungers 51.
[0046] The pump body 10 is a support structure of the plunger oil pump 100, which can carry the remaining components, so as to keep the positional relationship between different components stable. The pump body 10 is made of a high-strength material and can withstand the stress brought by high-pressure fluid and mechanical movement. A receiving groove 11, a first shaft hole 12, and two first flow holes 13 are provided on the pump body 10.
[0047] The receiving groove 11 is located on one side of the pump body 10, and its shape and size need to match the outer shape of the rotor 30 to ensure the smooth rotation of the rotor 30, and at the same time provide necessary space for the movement of the plunger 51. There is a preset gap between the inner wall surface of the receiving groove 11 and the rotor 30, and the preset gap can prevent hydraulic oil leakage and reduce friction. A first shaft hole 12 is provided at the bottom of the receiving groove 11, and the first shaft hole 12 is used to fix the central shaft 60, so as to maintain the positional relationship between the central shaft 60 and the rotor 30.
[0048] Two first flow holes 13 are also provided on the pump body 10, and the two first flow holes 13 are respectively communicated with the first shaft hole 12. One of the two first flow holes 13 is used to receive the hydraulic oil of the external oil pipe 200, and the other of the two first flow holes 13 is used to discharge the hydraulic oil to the external oil pipe 200.
[0049] The end cover 20 is coupled to the pump body 10 at the opening of the receiving groove 11, and can close the opening of the receiving groove 11, so as to provide a sealed environment for the rotor 30 in the pump body 10. In some embodiments, the end cover 20 can be coupled to the pump body 10 by bolts or other fasteners, and the pump body 10 and the end cover 20 can still maintain good sealing performance under high pressure conditions. In addition, a second shaft hole 21 is provided on the end cover 20, and the second shaft hole 21 can accommodate the driving part 31 of the rotor 30. That is, the driving part 31 of the rotor 30 passes through this hole and is connected to an external power source, such as an electric motor, an engine or a manual driving assembly.
[0050] The rotor 30 includes a driving part 31 and a cylinder block part 32. The driving part 31 is a shaft-like structure, and the driving part 31 is rotatably coupled to the second shaft hole 21. The cylinder block part 32 is located in the receiving groove 11 and is coupled to the driving part 31. A third shaft hole 321 is provided at the center of the cylinder block part 32. The central axes of the first shaft hole 12, the second shaft hole 21 and the third shaft hole 321 are coaxial, so as to ensure the smooth rotation of the rotor 30. A plurality of plunger holes 322 are arranged radially on the cylinder block part 32, and the plurality of plunger holes 322 are communicated with the third shaft hole 321, so as to form a space for the movement of the plunger 51 and a fluid passage.
[0051] The bearing 40 is arranged in the receiving groove 11 and is connected to the inner wall of the receiving groove 11. It should be understood that an annular limiting groove or a limiting step can be provided in the receiving groove 11, and the size of the limiting groove or the limiting step is adapted to the outer ring size of the bearing 40. When the bearing 40 is placed at the limiting groove or the limiting step, the position of the bearing 40 is restricted and remains stable.
[0052] Such as Figure 4As shown, the bearing 40 is sleeved outside the cylinder block portion 32, and the central axis of the bearing 40 is spaced apart from the central axis of the cylinder block portion 32. With this arrangement, the distance between the side wall of the cylinder block portion 32 and the inner ring of the bearing 40 is different in the circumferential direction. As Figure 4 shown in the cross-sectional view, the distance between the top position of the cylinder block portion 32 and the inner ring of the bearing 40 is the largest, and the distance between the bottom position of the cylinder block portion 32 and the inner ring of the bearing 40 is the smallest.
[0053] As Figures 3 to 6 shown, a plurality of plungers 51 are respectively inserted into a plurality of plunger holes 322 and abut against the inner ring of the bearing 40. In some embodiments, the plunger oil pump 100 further includes a plurality of elastic members 52. The plurality of elastic members 52 are respectively connected to the plurality of plungers 51, and the plurality of elastic members 52 are also connected to the cylinder block portion 32. Between the inner ring of the bearing and the cylinder block portion 32, the elastic members 52 are compressed. Under the elastic action, the elastic members 52 can drive the plungers 51 to abut against the inner ring of the bearing 40.
[0054] As Figure 3 、 Figure 4 、 Figure 7 and Figure 8 shown, the central shaft 60 is a continuous columnar structure. To facilitate the description of the connection relationship between the central shaft 60 and different components, it is divided into a first shaft section 61 and a second shaft section 62.
[0055] The first shaft section 61 of the central shaft 60 is fixed in the first shaft hole 12. During the operation of the plunger oil pump 100, the central shaft 60 and the pump body 10 remain stationary. The second shaft section 62 of the central shaft 60 is inserted into the third shaft hole 321 of the cylinder block portion 32, and the cylinder block portion 32 can rotate around the second shaft section 62.
[0056] As Figure 3 and Figure 8 shown, two parallel oil passages 63 are arranged axially inside the central shaft 60, and the two oil passages 63 are not connected. The first shaft section 61 is provided with two second flow-through holes 64. When the first shaft section 61 is fixed in the first shaft hole 12, the two second flow-through holes 64 are respectively communicated with the corresponding first flow-through holes 13 on the corresponding side. At the same time, the two second flow-through holes 64 are also respectively communicated with the two oil passages 63. The second shaft section 62 is provided with two distribution holes 65, and the two distribution holes 65 are respectively communicated with the two oil passages 63. During the process of the cylinder block portion 32 rotating around the second shaft section 62, the two distribution holes 65 can be separated from or communicated with the plunger holes 322.
[0057] As Figure 3As shown, the distance between the top position of the cylinder block portion 32 and the inner ring of the bearing 40 is the largest. Here, the plunger 51 is partially withdrawn from the plunger hole 322 under the action of the elastic member 52, so that the hydraulic oil in the upper oil passage 63 can be drawn into the corresponding plunger hole 322. After the cylinder block portion 32 rotates 180°, the plunger hole 322 for oil pumping moves to the lowest position. Here, the distance between the side wall of the cylinder block portion 32 and the inner ring of the bearing 40 is the smallest. The plunger 51 is partially inserted into the plunger hole 322 under the action of the inner ring of the bearing 40, and the hydraulic oil in the plunger hole 322 can be injected into the lower oil passage 63. During the continuous rotation of the cylinder block portion 32, the first flow hole 13 communicating with the upper oil passage 63 receives external hydraulic oil. Under the action of the plunger 51, the hydraulic oil is discharged through the first flow hole 13 communicating with the lower oil passage 63. It should be understood that by adjusting the rotation direction of the cylinder block portion 32, the flow direction of the hydraulic oil is correspondingly adjusted.
[0058] With this arrangement, during the rotation of the rotor 30, the hydraulic oil in one oil passage 63 in the central shaft 60 can be pumped and the hydraulic oil can be delivered to another oil passage 63 of the central shaft 60, thus efficiently driving the flow of the hydraulic oil. At the same time, the bearing 40 is sleeved outside the cylinder block portion 32 of the rotor 30. The structures of the bearing 40 and the rotor 30 are simple, and the production and assembly are relatively convenient, and it helps to save the space inside the pump body 10.
[0059] In some embodiments, as Figure 4 and Figure 5 shown, the pump body 10 further includes two groups of overflow holes 14, and the two groups of overflow holes 14 are respectively communicated with the two first flow holes 13. The plunger oil pump 100 further includes two groups of overflow valves 15, and the two groups of overflow valves 15 are respectively coupled to the two groups of overflow holes 14.
[0060] As Figure 4 and Figure 5 shown, the function of the overflow hole 14 is to provide a fluid discharge path when the internal pressure of the oil pump exceeds a predetermined value to prevent the oil pump from being damaged. The overflow valve 15 is a device for controlling the opening and closing of the overflow hole 14. In some embodiments, the overflow valve 15 may include a valve seat, a valve core, a spring, an adjusting screw, etc. The valve core is kept in a closed state under the action of the spring force. When the internal pressure of the pump body 10 rises to the set value, the fluid pressure is sufficient to overcome the elastic force of the spring and push the valve core away from the valve seat, so that the overflow hole 14 is opened and the fluid can be released.
[0061] With this arrangement, the overflow valve 15 can provide safety protection for the plunger oil pump 100. It can not only prevent the oil pump from being damaged due to overpressure, but also adjust the set pressure of the overflow valve 15 to control the output pressure and flow rate of the oil pump.
[0062] In some embodiments, as Figure 4 andFigure 5 As shown, an oil inlet hole 16 is provided on the pump body 10, and the oil inlet hole 16 communicates with the accommodation groove 11. The plunger oil pump 100 further includes an oil tank 71. The oil tank 71 is coupled to the pump body 10 on one side of the pump body 10, and the oil tank 71 is sleeved outside the two groups of overflow valves 15. The oil tank 71 communicates with the accommodation groove 11 via the oil inlet hole 16.
[0063] As Figure 4 and Figure 5 shown, the oil inlet hole 16 allows the external hydraulic oil to enter the accommodation groove 11 inside the pump body 10. The oil tank 71 is a container for storing hydraulic oil in the plunger oil pump 100, which not only provides the required hydraulic oil for the oil pump, but also plays a role in cooling, filtering and storing. The oil tank 71 is sleeved outside the overflow valve 15, which can directly return the hydraulic oil discharged by the overflow valve 15 to the oil tank 71, reducing the additional pipeline connection.
[0064] In some embodiments, as Figure 3 and Figure 5 shown, the plunger oil pump 100 further includes two oil pipe connectors 17. The two oil pipe connectors 17 are respectively coupled to the two first flow holes 13.
[0065] As Figure 3 and Figure 5 shown, the oil pipe connector 17 is a special connection component on the pump body 10, which can be connected to the external oil pipe 200. In some embodiments, the oil pipe connector 17 includes a threaded interface or a quick connection interface, which can be connected to the external oil pipe 200 to prevent leakage. Each oil pipe connector 17 is connected to a first flow hole 13, and the hydraulic oil can directly enter or leave the pump body 10 from inside the pump body 10, improving the efficiency and response speed of the oil pump.
[0066] In the plunger oil pump 100, one of the two oil pipe connectors 17 is used to receive the hydraulic oil from the external oil tank 71 or the oil circuit 63, and the other oil pipe connector 17 is used to output the pressurized hydraulic oil to other components in the hydraulic system, such as a hydraulic cylinder, a hydraulic motor, etc., which is called an oil outlet. The two oil pipe connectors 17 have clear division of labor, which can make the hydraulic oil flow orderly, thus supporting the normal operation of the hydraulic system.
[0067] In some embodiments, as Figures 3 to 5 shown, the plunger oil pump 100 further includes a skeleton oil seal 72. The skeleton oil seal 72 is sleeved outside the driving part 31 and is coupled to the inner wall of the second shaft hole 21.
[0068] As Figures 3 to 5As shown, the skeleton oil seal 72 is a seal with a rigid support skeleton. The inner side of the skeleton oil seal 72 is in close contact with the driving part 31, and the outer side of the skeleton oil seal 72 is in contact with the wall of the second shaft hole 21. In the plunger oil pump 100, the skeleton oil seal 72 is arranged in the second shaft hole 21 and forms a tight contact with the driving part 31, so as to achieve a sealing effect.
[0069] When the plunger oil pump 100 is working, the driving part 31 rotates in the second shaft hole 21. The skeleton oil seal 72 can fill the gap between the driving part 31 and the second shaft hole 21, thus preventing the leakage of hydraulic oil. In addition, the skeleton oil seal 72 can also block external impurities such as dust and moisture from entering the pump body 10, thereby reducing the wear of components such as the plunger 51 and the cylinder block part 32, and helping to improve the efficiency and service life of the plunger oil pump 100.
[0070] In some embodiments, as Figure 4 and Figure 5 shown, the plunger oil pump 100 further includes a first sealing ring 73. The first sealing ring 73 is coupled between the pump body 10 and the end cover 20.
[0071] As Figure 4 and Figure 5 shown, in the plunger oil pump 100, the first sealing ring 73 is located between the joint surfaces of the pump body 10 and the end cover 20, and can prevent the leakage of hydraulic oil and the intrusion of external impurities. The first sealing ring 73, through the characteristics of its elastic material, closely fits on the contact surface between the pump body 10 and the end cover 20, forming a sealing barrier. When the plunger oil pump 100 operates under high pressure, the first sealing ring 73 can effectively prevent the hydraulic oil in the receiving groove 11 from leaking from the joint of the pump body 10 and the end cover 20, ensuring the normal operation and efficiency of the plunger oil pump 100.
[0072] In some embodiments, as Figure 4 and Figure 5 shown, the plunger oil pump 100 further includes a second sealing ring 74. The second sealing ring 74 is arranged in the first shaft hole 12 and sleeved on the outside of the central shaft 60.
[0073] As Figure 4 and Figure 5 shown, the second sealing ring 74 can prevent the leakage of hydraulic oil through the gap between the central shaft 60 and the first shaft hole 12, thus ensuring that the fluid system inside the pump body 10 remains closed and under high pressure. When the plunger oil pump 100 operates, the second sealing ring 74 fits between the outer surface of the central shaft 60 and the inner wall of the first shaft hole 12, forming a reliable sealing barrier, thereby avoiding pressure loss and energy waste caused by fluid leakage. In addition, the second sealing ring 74 can also prevent external impurities from entering the pump body 10 through the shaft hole gap, protecting the internal components of the plunger oil pump 100 from being contaminated, and thus extending the service life and maintenance cycle of the plunger oil pump 100.
[0074] In some embodiments, as Figure 4 shown, the plunger oil pump 100 further includes a backing plate 75. The backing plate 75 is located on the side of the cylinder block portion 32 away from the end cover 20 and is closely attached to the bottom of the receiving groove 11. The backing plate 75 can provide a firm supporting surface to enhance the stability of the cylinder block portion 32 and ensure the smoothness and accuracy of the reciprocating movement of the plunger 51. The fourth shaft hole 750 on the backing plate 75 matches the central shaft 60, and the fourth shaft hole 750 allows the central shaft 60 to pass through it. The backing plate 75 forms a buffer zone between the cylinder block portion 32 and the bottom of the receiving groove 11. The buffer zone helps to absorb the impact force generated during the high-speed reciprocating movement of the plunger 51, reduce the adverse effects of vibration on the pump body 10, and thus extend the service life of the oil pump. In addition, the backing plate 75 can also help to distribute and balance the load during the movement of the plunger 51, thereby ensuring that the plunger oil pump 100 can maintain high efficiency and stability under various working conditions.
[0075] In some embodiments, as Figure 9 shown, the plunger oil pump 100 further includes a drive assembly 80. The drive assembly 80 is disposed on the side of the end cover 20 away from the pump body 10 and does not interfere with the pump body 10. The drive assembly 80 is coupled to the drive portion 31 of the rotor 30, and the power of the drive assembly 80 can be transmitted to the rotor 30, thereby driving the reciprocating movement of the plunger 51.
[0076] In some embodiments, as Figure 9 shown, the drive assembly 80 includes a rocker 81 and a crank 82. One end of the rocker 81 is connected to the drive portion 31, and the other end of the rocker 81 is connected to the crank 82. The length and position of the crank 82 can be set as needed to optimize the power transmission. With this arrangement, when the user rotates the crank 82, the drive portion 31 rotates accordingly, thereby pushing the plunger 51 to perform a reciprocating movement inside the pump body 10 to achieve the suction and discharge of hydraulic oil.
[0077] In some embodiments, as Figure 9 shown, the plunger oil pump 100 further includes a fixing assembly 90. The fixing assembly 90 is coupled to the end cover 20 and can be used to fix the plunger oil pump 100 to a position for user operation.
[0078] As Figure 9 shown, the fixing assembly 90 may include components such as screws, nuts, clamps, brackets, or bases, and can fix the plunger oil pump 100 at a specific operation position, such as on a mechanical device, a vehicle chassis, or a fixed industrial facility.
[0079] With this arrangement, the fixing component 90 can keep the plunger oil pump 100 stable during operation, avoiding displacement caused by vibration or external forces. In addition, the fixing component 90 also ensures the safety of the operator when using the plunger oil pump 100, preventing accidental injuries or equipment damage caused by the instability of the pump body 10.
[0080] In some embodiments, as Figure 9 shown, the fixing component 90 includes a main board 91, a pressing plate 92, and a locking member 93. The locking member 93 can adjust the distance between the main board 91 and the pressing plate 92, thereby clamping the plunger oil pump 100 to a position for user operation.
[0081] As Figure 9 shown, the main board 91 is disposed on the side of the end cover 20 away from the pump body 10, and the main board 91 and the end cover 20 can be fixed together by bolts. A through hole 910 is provided on the main board 91 corresponding to the driving portion 31, and the driving portion 31 can be inserted into the through hole 910. After passing through the main board 91, the driving portion 31 can be connected to the driving component 80.
[0082] A pressing plate 92 is disposed on one side of the main board 91, and the locking member 93 is coupled to the main board 91 and the pressing plate 92. The locking member 93 can be, for example, a locking rod, and the locking rod includes a threaded portion 931 and a handle portion 932. Threaded holes can be provided on the main board 91 and the pressing plate 92, and the threaded portion 931 is rotatably connected to the threaded holes on the main board 91 and the pressing plate 92. The user can drive the threaded portion 931 to rotate by turning the handle portion 932, thereby adjusting the distance between the main board 91 and the pressing plate 92. When the distance between the pressing plate 92 and the main board 91 decreases, the pressing plate 92 and the main board 91 can be clamped at a specific installation position for user operation.
[0083] In some embodiments, as Figure 9 shown, a plurality of pressing plates 92 and a plurality of locking members 93 can be installed on the main board 91, and the plurality of locking members 93 are respectively connected to the plurality of pressing plates 92, thereby improving the stability of the plunger oil pump 100.
[0084] In some embodiments, as Figure 9 shown, a notch 920 is provided on the side of the pressing plate 92 facing the main board 91, so as to be clamped at a specific installation position through the notch 920 and the main board 91.
[0085] In a second aspect of the present disclosure, a hydraulic system is provided. The hydraulic system includes a hydraulic transmission component and the plunger oil pump 100 of any one of the above.
[0086] The hydraulic transmission component is an actuator in the hydraulic system that can convert liquid pressure into mechanical motion or power. In some embodiments, the hydraulic transmission component includes a series of hydraulic cylinders, hydraulic motors or similar conversion devices for driving various parts of mechanical equipment to make movements, such as mobile platforms, boom arms, valves, doors or any mechanical structures that require precise control. The inlet and outlet ports of the hydraulic transmission component are the interfaces for connecting it to the plunger oil pump 100, and are respectively used to receive and discharge hydraulic oil. The two second flow holes 64 of the plunger oil pump 100 are respectively communicated with the inlet and outlet ports of the hydraulic transmission component.
[0087] When the plunger oil pump 100 works, the plunger oil pump 100 sucks in and discharges hydraulic oil, converting mechanical energy into hydraulic energy. Subsequently, the hydraulic energy is transmitted to the inlet port of the hydraulic transmission component through the second flow hole 64. At this time, the hydraulic oil enters the hydraulic transmission component under high pressure, pushing the pistons or vanes inside it, and converting the hydraulic energy into mechanical motion or force again. Then, the hydraulic oil after the action of the hydraulic transmission component returns to the plunger oil pump 100 through the outlet port, forming a closed-loop hydraulic cycle.
[0088] In some embodiments, the hydraulic transmission component can be a switch traction component. The switch traction component can be used for the conversion of railway switches or the traction operation of heavy machinery. By precisely controlling the pressure and flow rate of the hydraulic oil, the switch traction component can achieve the precise positioning of the switch point rail or the smooth movement of heavy machinery. In this case, the close cooperation between the plunger oil pump 100 and the switch traction component ensures the accuracy and safety of switch conversion, or the controllability and efficiency of heavy machinery movement.
[0089] The above has described the embodiments of the present disclosure. The above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations are obvious to those of ordinary skill in the art in the technical field without departing from the scope and spirit of the described embodiments. The selection of the terms used herein is intended to best explain the principles of the embodiments, practical applications or improvements to the technology in the market, or to enable other ordinary skill in the art in the technical field to understand the disclosed embodiments.
Claims
1. A plunger oil pump (100), characterized in that: include: A pump body (10), comprising a receiving groove (11), a first axial hole (12) and two first flow holes (13), wherein the receiving groove (11) is arranged on one side of the pump body (10), the first axial hole (12) is arranged at the bottom of the receiving groove (11), and the two first flow holes (13) are respectively connected to the first axial hole (12); an end cover (20) coupled to the pump body (10) at the opening of the receiving groove (11), and the end cover (20) comprises a second axial hole (21); A rotor (30), comprising a driving portion (31) and a cylinder portion (32), wherein the driving portion (31) is rotatably disposed in the second shaft hole (21), the cylinder portion (32) is disposed in the receiving groove (11) and coupled to the driving portion (31), a third shaft hole (321) is disposed at the center of the cylinder portion (32), and a plurality of plunger holes (322) are disposed in the radial direction of the cylinder portion (32); A bearing (40) is sleeved on the outer side of the cylinder body (32) and coupled to the inner wall of the accommodating groove (11), wherein the central axis of the bearing (40) is spaced apart from the central axis of the cylinder body (32); A plurality of plungers (51), respectively inserted into the plurality of plunger holes (322) and abutting against the inner ring of the bearing (40); as well as The central shaft (60) comprises a first shaft section (61) and a second shaft section (62), wherein the first shaft section (61) is fixed to the first shaft hole (12), and the second shaft section (62) is inserted into the third shaft hole (321). Two parallel oil passages (63) are arranged in the central shaft (60) along the axial direction, the first shaft section (61) is provided with two second flow holes (64), and the two second flow holes (64) are respectively connected to the two oil passages (63) and the first flow hole (13) on the corresponding side, and the second shaft section (62) is provided with two distribution holes (65), and the two distribution holes (65) are respectively connected to the two oil passages (63), and the two distribution holes (65) can be separated from or connected to the plunger hole (322) during the rotation of the cylinder body (32).
2. The plunger oil pump (100) according to claim 1, characterized in that: Also includes: A fixing assembly (90) is coupled to the end cover (20) and is suitable for fixing the plunger oil pump (100) to a position for user operation.
3. The plunger oil pump (100) according to claim 2, characterized in that: The fixing assembly (90) comprises: a main board (91), coupled to the end cover (20) at a side of the end cover (20) away from the pump body (10), and the main board (91) comprises a through hole (910), wherein the through hole (910) is suitable for the driving part (31) to be inserted; A pressing plate (92) is arranged on one side of the main board (91); and A locking member (93) is coupled to the main board (91) and the pressure plate (92), and the locking member (93) clamps the plunger oil pump (100) to a position for user operation by adjusting the distance between the pressure plate (92) and the main board (91).
4. The plunger oil pump (100) according to claim 1, characterized in that: The pump body (10) further comprises two groups of overflow holes (14), wherein the two groups of overflow holes (14) are respectively connected to the two first flow holes (13), and the plunger oil pump (100) further comprises: Two groups of overflow valves (15) are respectively coupled to the two groups of overflow holes (14).
5. The plunger oil pump (100) according to claim 4, characterized in that: The pump body (10) further comprises an oil inlet hole (16), wherein the oil inlet hole (16) is in communication with the receiving groove (11), and the plunger oil pump (100) further comprises: An oil tank (71) is coupled to the pump body (10) at one side of the pump body (10), and the oil tank (71) is sleeved on the outside of the two sets of overflow valves (15), and the oil tank (71) is connected to the containing groove (11) via the oil inlet hole (16).
6. The plunger oil pump (100) according to any one of claims 1 to 5, characterized in that: Also includes: Two oil pipe joints (17) are respectively coupled to the two first flow holes (13).
7. The plunger oil pump (100) according to any one of claims 1 to 5, characterized in that: Also includes: A driving assembly (80) is arranged on a side of the end cover (20) away from the pump body (10) and is coupled to the driving portion (31).
8. The plunger oil pump (100) according to claim 7, characterized in that: The drive assembly (80) comprises: A rocker (81) coupled to the driving portion (31); and A rocker handle (82) is coupled to an end of the rocker arm (81) away from the driving portion (31).
9. The plunger oil pump (100) according to any one of claims 1 to 5, characterized in that: Also includes: A skeleton oil seal (72) is sleeved on the outside of the driving portion (31) and coupled to the inner wall of the second shaft hole (21).
10. The plunger oil pump (100) according to any one of claims 1 to 5, characterized in that: Also includes: A first sealing ring (73) coupled to the pump body (10) and the end cover (20); as well as A second sealing ring (74) is arranged in the first shaft hole (12) and sleeved on the outer side of the central shaft (60).
11. The plunger oil pump (100) according to any one of claims 1 to 5, characterized in that: Also includes: A backing plate (75) is arranged on a side of the cylinder body (32) away from the end cover (20) and abuts against the bottom of the accommodating groove (11), and the backing plate (75) includes a fourth axial hole (750), and the fourth axial hole (750) is suitable for inserting the central shaft (60).
12. A hydraulic system, characterized in that: include: A hydraulic transmission assembly having a fluid inlet and a fluid outlet; as well as According to the plunger oil pump (100) according to any one of claims 1 to 11, the two second flow holes (64) of the plunger oil pump (100) are respectively connected to the liquid inlet and the liquid outlet.
13. The hydraulic system according to claim 12, characterized in that: The hydraulic transmission assembly includes a switch traction assembly.