Manual and electric integrated combined hydraulic oil pump

Abstract

The manual and electric integrated combined hydraulic oil pump comprises a framework oil path block, and a rotary valve hole area, a manual cavity, an oil absorption oil path, a descending oil path, an ascending oil path and an oil path oil return opening are integrated in the framework oil path block; the oil suction oil way is connected with the rotary valve hole area through an oil suction opening one-way valve and connected with the electric oil groove area through an electric oil passing way, and the electric oil groove area is connected with an oil way oil return opening. A rotary valve assembly, a manual plunger and an electric pump assembly are arranged in the framework oil way block, the manual plunger is installed in the manual cavity, and the electric pump assembly is connected with the electric oil groove area and the descending oil way. The rotary valve assembly comprises a rotary valve, and the outer side wall of the rotary valve and the inner wall of a rotary valve hole area form an annular low-pressure area which is connected with an oil way oil return opening and an ascending oil way. The rotary valve is provided with a valve cavity, a manual cavity, an oil suction oil way, a descending oil way and a channel of an ascending oil way, by means of the integrated oil way structure, manual and electric oil way multiplexing is achieved, external oil pipes and leakage points are reduced, and the sealing reliability is remarkably improved.

Description

Technical Field

[0001] The invention relates to the technical field of engineering machinery hydraulic pressure, and in particular to a manual electric integrated combined hydraulic oil pump. Background Art

[0002] In the field of engineering machinery hydraulics, cab lifting systems mostly use manual / electric dual-mode hydraulic pumps as power sources. The traditional solution, as shown in CN208669735U, connects the manual pump and the electric pump through bracket bolts, and realizes dual-system coupling with external oil pipes. Among them, the high-pressure oil generated by the electric pump enters the plunger cavity of the manual pump from the second oil circuit, then pushes open the one-way valve and is discharged through the oil outlet of the reversing valve. Although this solution also realizes the integration of the manual electric pump, it has the following defects:

[0003] First, the high-pressure oil generated by the electric pump directly enters the plunger cavity of the manual pump, which will cause the pressure in the plunger cavity to change sharply, resulting in pressure fluctuations and shocks. Such pressure fluctuations and shocks will cause mechanical stress to the plunger, seal ring, pump body and other manual components, which may cause wear or damage after long-term use, thus affecting the stability and reliability of the entire hydraulic system.

[0004] Secondly, the reversing valve has limited functions and no integrated oil return function, that is, only an oil outlet circuit is set up, but no integrated oil return circuit. The oil return pipe of the jacking cylinder needs an additional external oil pipe to be connected to the oil tank. The additional external oil pipe increases the complexity of the system and increases potential leakage points and failure points. Summary of the invention

[0005] The purpose of the present invention is to provide a manual-electric integrated combined hydraulic oil pump to address the problems existing in the prior art, so as to realize the reuse of manual and electric oil circuits, eliminate the external oil pipe, and the integrated oil circuit structure greatly reduces the leakage points and significantly improves the sealing reliability.

[0006] To achieve the above object, the technical solution adopted by the present invention is:

[0007] A manual electric integrated combined hydraulic oil pump comprises: a skeleton oil circuit block, a rotary valve hole area is provided inside the skeleton oil circuit block, and a manual cavity, an oil suction circuit, a descending oil circuit, an ascending oil circuit, and an oil circuit return port connected to the rotary valve hole area; the oil suction circuit is connected to the rotary valve hole area through an oil suction port one-way valve, and is connected to the electric oil tank area through an electric oil passage; the electric oil tank area is connected to the oil circuit return port; a rotary valve assembly, a manual plunger and an electric pump assembly are integrated inside the skeleton oil circuit block; the manual plunger is movably installed in the manual cavity; the low-pressure input end of the electric pump assembly is connected to the electric oil tank area, and the high-pressure output end is connected to the The descending oil circuit; the rotary valve assembly includes a rotary valve, which can be rotatably assembled in the rotary valve hole area, and an annular low-pressure area is provided between the outer wall of the rotary valve and the inner wall of the rotary valve hole area; one side of the annular low-pressure area is connected to the oil return port of the oil circuit, and the other side is connected to the ascending oil circuit; the rotary valve is provided with a valve cavity, and a first cross channel, a second cross channel and a first channel connected to the valve cavity; the first cross channel is connected to the valve cavity through an oil discharge port one-way valve, and is used to connect the manual cavity with the oil suction circuit; the second cross channel is used to connect the descending oil circuit; the first channel is used to connect the ascending oil circuit.

[0008] Furthermore, the electric pump assembly includes an electric rotary valve block and a DC motor coaxially arranged in the electric oil tank area, and the two realize power transmission through an eccentric shaft; a closed C-shaped high-pressure ring is formed between the electric rotary valve block and the inner wall of the electric oil tank area; the C-shaped high-pressure ring is connected to the bridge shaft assembly, and the bridge shaft assembly is connected to the descending oil circuit.

[0009] Furthermore, the eccentric shaft is connected to an eccentric disk, and the eccentric disk is rotatably arranged in a central circular hole of the electric rotary valve block; the electric rotary valve block includes an oil passage chamber, and the oil passage chamber is connected to the electric oil tank area through the oil absorption copper filter; a plunger rod is provided in the oil passage chamber, and one end of the plunger rod passes through the oil passage chamber and extends into the circular hole, and abuts against the eccentric disk; a copper flat valve is provided at the other end of the oil passage chamber, and the copper flat valve is connected to the C-type high-pressure ring.

[0010] Furthermore, a torque shaft is provided in the shaft hole of the skeleton oil circuit block, the torque shaft is connected to the cam assembly through a spline and is axially positioned by a limit card; the swing pin of the cam assembly is inserted into the waist groove of the manual plunger, and the length direction of the waist groove forms an inclination angle with the movement direction of the manual plunger; the cam assembly drives the manual plunger to reciprocate in the manual cavity.

[0011] Furthermore, one end of the rotary valve extends out of the skeleton oil circuit block and is connected to a rotary rod, and the oil circuit is switched by rotating the rotary rod; a limit pin is provided on the outside of the skeleton oil circuit block to limit the left and right turning range of the rotary rod.

[0012] Furthermore, a safety chamber is provided in the skeleton oil circuit block, one side of the safety chamber is connected to the second cross channel, and the other side is connected to the oil return port of the safety valve; an overflow valve assembly is provided in the safety chamber, and the overflow valve assembly includes the overflow steel ball arranged in front of the oil return port of the safety valve, a high-pressure spring abutting against the overflow steel ball, and an adjusting bolt for adjusting the compression amount of the high-pressure spring, and the adjusting bolt passes through the side wall of the skeleton oil circuit block and is fixed by a sealing bolt.

[0013] Furthermore, the oil suction circuit, the descending oil circuit, and the ascending oil circuit are respectively connected to the oil suction port quick-connect joint, the descending port quick-connect joint, and the ascending port quick-connect joint; the thread roots of the oil suction port quick-connect joint, the descending port quick-connect joint, and the ascending port quick-connect joint are provided with a sealing glue groove, and the sealing glue groove is filled with thread fastening glue to form an axial sealing structure.

[0014] Furthermore, a circuit controller is provided on the outside of the skeleton oil circuit block, and the circuit controller is fixed to the motor bracket by bolts. The input end of the circuit controller is connected to the vehicle power supply, and the output end is connected to the DC motor for controlling the start and stop of the DC motor.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] By optimizing the oil circuit design, the high-pressure oil generated by the electric pump is first introduced into the descending oil circuit for communication. A part of the hydraulic oil goes down through the descending oil circuit and enters the upper chamber of the hydraulic cylinder through the descending port quick-plug joint. A part of the hydraulic oil goes up through the descending oil circuit and enters the valve chamber of the rotary valve. The hydraulic oil in the valve chamber enters the ascending oil circuit through the first channel and enters the lower chamber of the hydraulic cylinder through the ascending port quick-plug joint. The hydraulic cylinder rises due to the pressure difference between the upper and lower chambers. With this oil circuit design, when the high-pressure oil enters the valve chamber, since the valve chamber and the first cross channel have a one-way valve, the high-pressure oil can be prevented from interfering with and damaging the manual pump assembly, thereby improving the stability and reliability of the hydraulic system. At the same time, this hydraulic drive method is more efficient and can reduce energy loss.

[0017] The skeleton oil circuit block integrates the rotary valve hole area, electric oil tank area and multiple oil circuits. Through the coordination of the rotary valve assembly and the electric rotary valve block, the manual and electric oil circuits can be reused, and the external oil pipes are eliminated. The integrated oil circuit structure greatly reduces the leakage points and significantly improves the sealing reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 This is a schematic diagram of the three-dimensional structure of a combined hydraulic oil pump in one embodiment of the present application;

[0020] Figure 2 This is a schematic structural diagram of a combined hydraulic oil pump in a front view (partial cross-section of the electric oil tank area) in an embodiment of the present application;

[0021] Figure 3 For this application Figure 2 A cross-sectional view at AA in the middle, wherein the rotary valve assembly is in a vertical state;

[0022] Figure 4 For this application Figure 2 A cross-sectional view at AA in the middle, wherein the rotary valve assembly is in a horizontal state;

[0023] Figure 5 For this application Figure 3 A partial enlarged schematic diagram of the middle rotary valve;

[0024] Figure 6 For this application Figure 2 Cross-section at the middle BB;

[0025] Figure 7 This is a schematic diagram of the structure of an electric rotary valve block in one embodiment of the present application;

[0026] Figure 8 This is a schematic structural diagram of a relief valve assembly in one embodiment of the present application;

[0027] Fig. 9 This is a structural schematic diagram of a bridge shaft assembly in one embodiment of the present application;

[0028] Fig.10 This is a schematic diagram of the structure of a cam in one embodiment of the present application;

[0029] In the figure: 1. skeleton oil block; 2. rotating rod; 3. quick connector for oil suction port; 4. quick connector for descending port; 5. quick connector for ascending port; 6. torque shaft; 7. circuit controller; 8. DC motor; 9. cam assembly; 10. limit card; 12. manual plunger; 13. Y-type sealing ring for hole; 14. rotary valve assembly; 15. check valve for oil suction port; 16. overflow valve assembly; 17. rotary valve; 18a. first cross channel; 18b. second cross channel; 18c. first channel; 20. check valve for oil discharge port; 21. spring; 22. sealing steel ball; 23. limit bolt; 24. overflow steel ball; 25. high pressure spring; 26. Adjusting bolt; 27. Sealing bolt; 28. C-type high-pressure ring; 29. ​​Hydraulic oil high-pressure area; 30. Plunger rod; 31. Oil suction copper filter; 32. Eccentric shaft; 33. Eccentric disk; 34. Bridge shaft assembly; 35. Bridge shaft; 36. Sealing ring; 37. Electric rotary valve block; 38. Limit pin; 39. Electric oil tank area; 41. Manual cavity; 42. Valve cavity; 43. Safety cavity; 44. Oil suction oil circuit; 45. Descending oil circuit; 46. Ascending oil circuit; 47. Cam; 48. Swing pin; 49. Oil passage cavity; 50. Copper flat valve; 51. Electric oil passage; 52. Annular low-pressure area; 53. Oil circuit return port; 54. Safety valve oil return port. DETAILED DESCRIPTION

[0030] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the invented product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0032] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0033] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In the field of engineering machinery hydraulics, cab lifting systems mostly use manual / electric dual-mode hydraulic pumps as power sources. The traditional solution, as shown in CN208669735U, connects the manual pump and the electric pump through bracket bolts, and realizes dual-system coupling with external oil pipes. Among them, the high-pressure oil generated by the electric pump enters the plunger cavity of the manual pump from the second oil circuit, then pushes open the one-way valve and is discharged through the oil outlet of the reversing valve. Although this solution also realizes the integration of the manual electric pump, it has the following defects:

[0035] First, the high-pressure oil generated by the electric pump directly enters the plunger cavity of the manual pump, which will cause the pressure in the plunger cavity to change sharply, resulting in pressure fluctuations and shocks. Such pressure fluctuations and shocks will cause mechanical stress to the plunger, seal ring, pump body and other manual components, which may cause wear or damage after long-term use, thus affecting the stability and reliability of the entire hydraulic system.

[0036] Secondly, the reversing valve has limited functions and no integrated oil return function, that is, only an oil outlet circuit is set up, but no integrated oil return circuit. The oil return pipe of the jacking cylinder needs an additional external oil pipe to be connected to the oil tank. The additional external oil pipe increases the complexity of the system and increases potential leakage points and failure points.

[0037] Regarding the above technical issues, such as Figures 1 to 10As shown, the embodiment of the present application provides a manual electric integrated combined hydraulic oil pump, including: a skeleton oil circuit block 1, which is provided with a rotary valve hole area, and a manual cavity 41 connected to the rotary valve hole area, an oil suction oil circuit 44, a descending oil circuit 45, an ascending oil circuit 46, and an oil circuit return port 53; the oil suction oil circuit 44 is connected to the rotary valve hole area through an oil suction port one-way valve 15, and is connected to the electric oil tank area 39 through an electric oil passage 51; the electric oil tank area 39 is connected to the oil circuit return port 53; the skeleton oil circuit block 1 is integrated with a rotary valve assembly 14, a manual plunger 12 and an electric pump assembly; the manual plunger 12 is movably installed in the manual cavity 41; the low-pressure input end of the electric pump assembly is connected to the electric oil tank area 39, and the high-pressure The output end is connected to the descending oil circuit 45; the rotary valve assembly 14 includes a rotary valve 17, which can be rotatably assembled in the rotary valve hole area, and an annular low-pressure area 52 is provided between its outer wall and the inner wall of the rotary valve hole area; one side of the annular low-pressure area 52 is connected to the oil return port 53 of the oil circuit, and the other side is connected to the ascending oil circuit 46; the rotary valve 17 is provided with a valve cavity 42, and a first cross channel 18a, a second cross channel 18b and a first channel 18c connected to the valve cavity 42; the first cross channel 18a is connected to the valve cavity through the oil discharge port one-way valve 20, and is used to connect the manual cavity 41 with the oil suction oil circuit 44; the second cross channel 18b is used to connect the descending oil circuit 45; the first channel 18c is used to connect the ascending oil circuit 46.

[0038] Among them, the electric pump assembly includes an electric rotary valve block 37 and a DC motor 8 coaxially arranged in the electric oil tank area 39, and the two realize power transmission through the eccentric shaft 32; a closed C-type high-pressure ring 28 is formed between the electric rotary valve block 37 and the inner wall of the electric oil tank area 39; the C-type high-pressure ring 28 is connected to the bridge shaft assembly 34, and the bridge shaft assembly 34 is connected to the descending oil circuit 45.

[0039] The above embodiment realizes seamless switching between manual and electric modes through the oil circuit design of the integrated skeleton oil circuit block 1 and the coordinated effect of the rotary valve assembly 14 and the electric rotary valve block 37. The specific working process is as follows:

[0040] Manual part lifting process: put the handle of the rotary valve assembly 14 in the vertical direction, the rotary valve assembly 14 is in the rising position, use the tool to manually move the torque shaft 6, and drive the manual plunger 12 to move up and down through the swing pin 48 on the cam assembly 9. When the manual plunger 12 moves upward, due to the sealing effect of the Y-type sealing ring 13 used in the hole, negative pressure is formed in the manual cavity 41, and the hydraulic oil enters the oil suction oil circuit 44 through the oil suction port quick plug connector 3, pushes open the oil suction port check valve 15 and enters the manual cavity 41; when the manual plunger 12 moves upward, the hydraulic oil enters the oil suction oil circuit 44 through the oil suction port quick plug connector 3, pushes open the oil suction port check valve 15 and enters the manual cavity 41; When running downward, the hydraulic oil is compressed by the Y-shaped sealing ring 13 in the hole, and the hydraulic oil in the manual cavity 41 compresses the spring 21 to push open the oil discharge port check valve 20 and enter the valve cavity 42 of the rotary valve assembly 14; a part of the hydraulic oil enters the descending oil circuit 45 through the second cross channel 18b on the lower left side and flows to the descending port quick connector 4 to enter the upper cavity of the hydraulic cylinder, and a part of the hydraulic oil enters the ascending oil circuit 46 through the first channel 18c on the lower right side and flows to the ascending port quick connector 5 to enter the lower cavity of the hydraulic cylinder, and the hydraulic cylinder rises due to the pressure difference between the upper and lower cavities.

[0041] The electric lifting process: the handle of the rotary valve assembly 14 is placed in the vertical direction, the rotary valve assembly 14 is in the rising position, the input end of the circuit controller 7 is connected to the vehicle power supply, and the output end is connected to the DC motor 8. After the circuit controller 7 is started, the DC motor 8 starts to rotate; the rotation of the DC motor 8 drives the eccentric shaft 32 to rotate synchronously, and the eccentric disk 33 drives the plunger rod 30 to run radially toward the center in the oil chamber 49, and a negative pressure is formed in the oil chamber 49. The hydraulic oil enters the oil suction circuit 44 through the oil suction port quick connector 3, and enters the electric oil tank area 39 through the electric oil passage 51, and flows into and fills the oil chamber 49 after being filtered by the oil suction copper filter; the eccentric disk 33 pushes the plunger rod 30 to run radially outward in the oil chamber 49, and compresses the oil. The hydraulic oil in the oil chamber 49 forms a high pressure to push open the copper flat valve 50, and the high-pressure hydraulic oil enters the hydraulic oil high-pressure area 29 closed by the C-type high-pressure ring 28 and flows into the bridge shaft assembly 34, and the bridge shaft assembly 34 is connected to the descending oil circuit 45; a part of the hydraulic oil goes down through the descending oil circuit 45 and enters the upper chamber of the hydraulic cylinder through the descending port quick-plug connector 4, and a part of the hydraulic oil goes up through the descending oil circuit 45 and enters the valve chamber 42 of the rotary valve assembly 14 through the second cross channel 18b on the lower left side. Because the valve chamber 42 is blocked by the oil discharge port one-way valve 20 and the sealing steel ball 22 on the left and right sides, the hydraulic oil in the valve chamber 42 enters the ascending oil circuit 46 through the first channel 18c on the lower right side, and enters the lower chamber of the hydraulic cylinder through the ascending port quick-plug connector 5, and the hydraulic cylinder rises by the pressure difference between the upper and lower chambers.

[0042] The manual part descending process: the handle of the rotary valve assembly 14 is placed in the horizontal direction, and the rotary valve assembly 14 is in the descending position. During the up and down movement of the manual plunger 12, the direction of the front oil circuit is consistent with the manual part lifting process. The high-pressure hydraulic oil in the manual cavity 41 compresses the spring 21 to push open the oil discharge port check valve 20 and enter the valve cavity 42 of the rotary valve assembly 14; a part of the hydraulic oil enters the descending oil circuit 45 through the second cross channel 18b on the lower left side and flows to the descending port quick plug connector 4 to enter the upper cavity of the hydraulic cylinder. The rear part of the valve cavity 42 is sealed with a sealing steel ball 22; the upper cavity of the hydraulic cylinder descends under the action of pressure, squeezing the hydraulic oil in the lower cavity of the hydraulic cylinder. The hydraulic oil in the lower cavity of the hydraulic cylinder enters the ascending oil circuit 46 through the ascending port quick plug connector 5 and flows to the annular low-pressure area 52, and enters the electric oil tank area 39 through the oil return port 53 connected to the annular low-pressure area 52, flows to the electric oil passage 51, enters the oil suction port quick plug connector 3, and returns to the external oil tank to form a cycle;

[0043] The lowering process of the electric part: the handle of the rotary valve assembly 14 is placed in the horizontal direction, and the rotary valve assembly 14 is in the lowering position. The working process of the electric part is consistent with the rising process of the electric part. The high-pressure hydraulic oil enters the hydraulic oil high-pressure area 29 closed by the C-type high-pressure ring 28 and flows into the bridge shaft assembly 34. The bridge shaft assembly 34 is connected with the descending oil circuit 45; a part of the hydraulic oil enters the descending oil circuit 45 through the second cross channel 18b on the lower left side and flows to the descending port quick plug connector 4 to enter the upper chamber of the hydraulic cylinder. The rear part of the valve chamber 42 is sealed with a sealing steel ball 22; the upper chamber of the hydraulic cylinder descends under the action of pressure, squeezing the hydraulic oil in the lower chamber of the hydraulic cylinder. The hydraulic oil in the lower chamber of the hydraulic cylinder enters the ascending oil circuit 46 through the ascending port quick plug connector 5 and flows to the annular low-pressure area 52, and enters the electric oil tank area 39 through the oil circuit return port 53 connected to the annular low-pressure area 52, flows to the electric oil circuit 51, enters the oil suction port quick plug connector 3, and returns to the external oil storage to form a cycle.

[0044] This embodiment optimizes the oil circuit design so that the high-pressure oil generated by the electric pump is first introduced into the descending oil circuit 45 for communication. A portion of the hydraulic oil goes down through the descending oil circuit 45 and enters the upper chamber of the hydraulic cylinder through the descending quick-connect fitting 4. A portion of the hydraulic oil goes up through the descending oil circuit 45 and enters the valve chamber 42 of the rotary valve 17. The hydraulic oil in the valve chamber 42 enters the ascending oil circuit 46 through the first channel 18c and enters the lower chamber of the hydraulic cylinder through the ascending quick-connect fitting 5. The hydraulic cylinder rises due to the pressure difference between the upper and lower chambers. With the oil circuit design of this embodiment, when the high-pressure oil enters the valve chamber 42, since the valve chamber 42 and the first cross channel 18a have a one-way valve design, it can prevent the high-pressure oil from interfering with and damaging the manual pump assembly, thereby improving the stability and reliability of the hydraulic system. At the same time, this hydraulic drive method is more efficient and can reduce energy loss.

[0045] In this embodiment, the rotary valve assembly 14, the electric rotary valve block 37, the DC motor 8, and the overflow valve assembly 16 are integrated into the skeleton oil circuit block 1, and all oil circuits and moving parts are built into the skeleton oil circuit block to form an integral skeleton integrated structure, thereby achieving high integration and functional modularization of the oil circuit.

[0046] The skeleton oil circuit block 1 integrates a rotary valve hole area, an electric oil tank area 39 and multiple oil circuits. Through the coordination of the rotary valve assembly 14 and the electric rotary valve block 37, manual electric oil circuit reuse is achieved, and the external oil pipe is eliminated. The integrated oil circuit structure greatly reduces leakage points and significantly improves sealing reliability.

[0047] like Figure 2 , 7 As shown, in some embodiments, the eccentric shaft 32 is connected to the eccentric disk 33, and the eccentric disk 33 can be rotatably arranged in the central circular hole of the electric rotary valve block 37; the electric rotary valve block 37 includes an oil passage chamber 49, and the oil passage chamber 49 is connected to the electric oil tank area 39 through an oil absorption copper filter 31; a plunger rod 30 is provided in the oil passage chamber 49, and one end of the plunger rod 30 passes through the oil passage chamber 49 and extends into the circular hole, and abuts against the eccentric disk 33; a copper flat valve 50 is provided at the other end of the oil passage chamber 49, and the copper flat valve 50 is connected to the C-type high-pressure ring 28.

[0048] One end of the plunger rod 30 extends into the circular hole and contacts the eccentric disc 33, and performs radial reciprocating motion in the oil chamber 49 as the eccentric disc 33 rotates. When the plunger rod 30 moves radially inward, the volume of the oil chamber 49 increases to form a negative pressure, and the hydraulic oil in the electric oil tank area 39 enters the oil chamber 49 after being filtered by the oil-absorbing copper filter 31. When the plunger rod 30 moves radially outward, the eccentric disc 33 pushes the plunger rod 30 to compress the oil in the oil chamber 49, forming a high-pressure oil flow, pushing open the copper flat valve 50 to enter the hydraulic oil high-pressure area 29 closed by the C-type high-pressure ring 28, and the high-pressure oil enters the bridge shaft assembly 34 through the C-type high-pressure ring 28, and is diverted to the descending oil circuit 45 and the valve chamber 42 of the rotary valve assembly 14, driving the oil cylinder to operate.

[0049] like Figure 2 , 6 As shown in 10, in some embodiments, a torque shaft 6 is provided in the shaft hole of the skeleton oil circuit block 1, the torque shaft 6 is connected to the cam assembly 9 through a spline, and is axially positioned by the limit card 10; the swing pin 48 of the cam assembly 9 is inserted into the waist groove of the manual plunger 12, and the length direction of the waist groove forms an inclination angle with the movement direction of the manual plunger 12; the cam assembly 9 drives the manual plunger 12 to reciprocate in the manual cavity.

[0050] When the torque shaft 6 rotates, the cam assembly 9 swings, driving the swing pin 48 to slide along the inclined track of the waist groove, converting the rotary motion into the linear reciprocating motion of the manual plunger 12 in the manual cavity 41. When the manual plunger 12 moves upward, negative pressure is formed in the manual cavity 41, and the external oil pushes open the oil suction port check valve 15 through the oil suction oil path 44, and enters the manual cavity 41 through the first cross channel 18a. When the manual plunger 12 moves downward, the hole Y-shaped sealing ring 13 compresses the oil, pushes open the oil discharge port check valve 20 through the first cross channel 18a, and enters the valve cavity 42, driving the oil cylinder to move.

[0051] like Figure 1 As shown, in some embodiments, one end of the rotary valve 17 extends out of the skeleton oil circuit block 1 and is connected to the rotating rod 2, and the oil circuit is switched by rotating the rotating rod 2; a limit pin 38 is provided on the outside of the skeleton oil circuit block 1 to limit the left and right turning range of the rotating rod 2.

[0052] The operator manually rotates the rotating rod 2 left and right to drive the rotary valve 17 to rotate synchronously in the rotary valve hole area. Through the changes in the orientation of the first cross channel 18a, the second cross channel 18b, and the first channel 18c inside the valve body, the conduction states of the oil suction oil circuit 44, the descending oil circuit 45, and the ascending oil circuit 46 are switched. When the rotating rod 2 turns to the vertical direction, the side of the rod body abuts the left side of the limit pin 38 to limit further left turn, the second cross channel 18b of the valve cavity 42 is connected to the guide sleeve of the descending oil circuit 45, and the first channel of the valve cavity 42 is connected to the ascending oil circuit 46. When the rotating rod 2 turns to the horizontal direction, the other side of the rod body abuts the right side of the limit pin 38 to prevent excessive right turn, the second cross channel 18b of the valve cavity 42 is connected to the descending oil circuit 45 and the return oil circuit, and the first channel 18c of the valve cavity 42 is staggered with the ascending oil circuit 46.

[0053] like Figure 3 , 4 As shown in , 5 , in some embodiments, a safety chamber 43 is provided in the skeleton oil circuit block 1, one side of the safety chamber 43 is connected to the second cross channel 18 b, and the other side is connected to the safety valve oil return port 54; an overflow valve assembly 16 is provided in the safety chamber, and the overflow valve assembly 16 includes an overflow steel ball 24 arranged in front of the safety valve oil return port 54, a high-pressure spring 25 abutting against the overflow steel ball 24, and an adjusting bolt 26 for adjusting the compression amount of the high-pressure spring 25, and the adjusting bolt 26 passes through the side wall of the skeleton oil circuit block 1 and is fixed by a sealing bolt 27.

[0054] When the system pressure exceeds the set threshold, the high-pressure oil enters the safety chamber 43 through the second cross channel 18b, pushes the overflow steel ball 24 to overcome the preload of the high-pressure spring 25, separates from the valve seat and opens the safety valve oil return port 54. The overpressure oil flows back to the electric oil tank area 39 through the safety valve oil return port 54, and then flows from the electric oil tank area 39 through the electric oil passage 51 to the oil suction passage 44, and then flows to the external oil tank through the oil suction port quick connector 3, quickly reducing the system pressure and avoiding component damage.

[0055] like Figure 1 , 3 As shown in Figures 4 and 5, in some embodiments, the oil suction circuit 44, the descending oil circuit 45, and the ascending oil circuit 46 are respectively connected to the oil suction port quick connector 3, the descending port quick connector 4, and the ascending port quick connector 5; the thread roots of the oil suction port quick connector 3, the descending port quick connector 4, and the ascending port quick connector 5 are provided with a sealing glue groove, and the sealing glue groove is filled with thread fastening glue to form an axial sealing structure.

[0056] The oil suction circuit 44, the descending oil circuit 45, and the ascending oil circuit 46 are quickly connected to the external oil pipe through the oil suction port quick plug connector 3, the descending port quick plug connector 4, and the ascending port quick plug connector 5 respectively. When the quick plug connector is screwed into the corresponding interface of the skeleton oil circuit block 1, the thread fastening glue solidifies in the thread gap to form an axial sealing layer to prevent oil from leaking along the thread gap. The plug-in seal of the quick plug connector and the axial sealing glue layer at the root of the thread work together to adapt to high pressure and vibration conditions and significantly reduce the risk of leakage.

[0057] like Figure 1 As shown, in some embodiments, a circuit controller 7 is provided on the outside of the skeleton oil circuit block 1, and the circuit controller 7 is fixed to the motor bracket by bolts. The input end of the circuit controller 7 is connected to the vehicle power supply, and the output end is connected to the DC motor 8 for controlling the start and stop of the DC motor 8.

[0058] The operator starts the circuit controller through an external switch or remote control signal, and its internal circuit controls the start and stop and speed of the DC motor 8. After the DC motor 8 is started, it drives the eccentric shaft 32 to rotate, driving the electric rotary valve block 37 and the plunger rod 30 to move, completing the oil compression and oil circuit switching.

[0059] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A manual electric integrated combined hydraulic oil pump, characterized in that: include: The skeleton oil circuit block (1) is provided with a rotary valve hole area, a manual cavity (41), an oil suction oil circuit (44), a descending oil circuit (45), an ascending oil circuit (46), and an oil circuit return port (53) connected to the rotary valve hole area; the oil suction oil circuit (44) is connected to the rotary valve hole area via an oil suction port one-way valve (15), and is connected to an electric oil tank area (39) via an electric oil passage (51); the electric oil tank area (39) is connected to the oil circuit return port (53); The skeleton oil circuit block (1) has a rotary valve assembly (14), a manual plunger (12) and an electric pump assembly integrated therein; the manual plunger (12) is movably mounted in the manual cavity (41); the low-pressure input end of the electric pump assembly is connected to the electric oil tank area (39), and the high-pressure output end is connected to the descending oil circuit (45); The rotary valve assembly (14) comprises a rotary valve (17), the rotary valve (17) being rotatably mounted in the rotary valve hole, and an annular low-pressure area (52) being provided between the outer wall of the rotary valve and the inner wall of the rotary valve hole; one side of the annular low-pressure area (52) is connected to the oil return port (53) of the oil circuit, and the other side is connected to the rising oil circuit (46); The rotary valve (17) is provided with a valve cavity (42), and a first cross channel (18a), a second cross channel (18b) and a first channel (18c) connected to the valve cavity (42); the first cross channel (18a) is connected to the valve cavity (42) via an oil discharge port one-way valve (20), and is used to connect the manual cavity (41) and the oil suction oil circuit (44); the second cross channel (18b) is used to connect the descending oil circuit (45); and the first channel (18c) is used to connect the ascending oil circuit (46).

2. A manual electric integrated combined hydraulic oil pump according to claim 1, characterized in that: The electric pump assembly comprises an electric rotary valve block (37) and a DC motor (8) coaxially arranged in an electric oil tank area (39), and the two realize power transmission through an eccentric shaft (32); a sealed C-shaped high-pressure ring (28) is formed between the electric rotary valve block (37) and the inner wall of the electric oil tank area (39); the C-shaped high-pressure ring (28) is connected to a bridge shaft assembly (34), and the bridge shaft assembly (34) is connected to the descending oil path (45).

3. A manual electric integrated combined hydraulic oil pump according to claim 2, characterized in that: The eccentric shaft (32) is connected to an eccentric disk (33), and the eccentric disk (33) is rotatably arranged in a central circular hole of the electric rotary valve block (37); the electric rotary valve block (37) comprises an oil passage chamber (49), and the oil passage chamber (49) is connected to the electric oil tank area (39) through the oil absorption copper filter (31); a plunger rod (30) is arranged in the oil passage chamber (49), and one end of the plunger rod (30) passes through the oil passage chamber (49) and extends into the circular hole, and abuts against the eccentric disk (33); a copper flat valve (50) is arranged at the other end of the oil passage chamber (49), and the copper flat valve (50) is connected to the C-type high-pressure ring (28).

4. The manual electric integrated combined hydraulic oil pump according to claim 1, characterized in that: A torque shaft (6) is provided in the shaft hole of the skeleton oil circuit block (1); the torque shaft (6) is connected to the cam assembly (9) via a spline and is axially positioned by a limit card (10); the swing pin (48) of the cam assembly (9) is inserted into the waist groove of the manual plunger (12); the length direction of the waist groove forms an inclination angle with the movement direction of the manual plunger (12); the cam assembly (9) drives the manual plunger (12) to reciprocate in the manual cavity (41).

5. The manual electric integrated combined hydraulic oil pump according to claim 1, characterized in that: One end of the rotary valve (17) extends out of the skeleton oil circuit block (1) and is connected to a rotary rod (2), and the oil circuit is switched by rotating the rotary rod (2); a limit pin (38) is provided on the outside of the skeleton oil circuit block (1) for limiting the left and right turning range of the rotary rod (2).

6. The manual electric integrated combined hydraulic oil pump according to claim 1, characterized in that: A safety chamber (43) is provided in the skeleton oil passage block (1), one side of the safety chamber (43) is connected to the second cross channel (18b), and the other side is connected to the safety valve oil return port (54); a relief valve assembly (16) is provided in the safety chamber, and the relief valve assembly (16) comprises the relief steel ball (24) provided in front of the safety valve oil return port (54), a high-pressure spring (25) abutting against the relief steel ball (24), and an adjusting bolt (26) for adjusting the compression amount of the high-pressure spring (25), and the adjusting bolt (26) passes through the side wall of the skeleton oil passage block (1) and is fixed by a sealing bolt (27).

7. The manual electric integrated combined hydraulic oil pump according to claim 1, characterized in that: The oil suction circuit (44), the descending oil circuit (45), and the ascending oil circuit (46) are respectively connected to the oil suction port quick connector (3), the descending port quick connector (4), and the ascending port quick connector (5); the thread roots of the oil suction port quick connector (3), the descending port quick connector (4), and the ascending port quick connector (5) are provided with sealing rubber grooves, and the sealing rubber grooves are filled with thread fastening rubber to form an axial sealing structure.

8. The manual electric integrated combined hydraulic oil pump according to claim 1, characterized in that: A circuit controller (7) is provided on the outside of the skeleton oil circuit block (1), and the circuit controller (7) is fixed to the motor bracket by bolts. The input end of the circuit controller (7) is connected to the vehicle power supply, and the output end is connected to the DC motor (8) for controlling the start and stop of the DC motor (8).

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