Servo oil pump motor set structure

Abstract

The invention discloses a servo oil pump motor set structure, and relates to the technical field of servo oil pumps, the servo oil pump motor set structure comprises a mounting mechanism, the mounting mechanism comprises a mounting bottom plate, the top of the mounting bottom plate is fixedly connected with a cooling mounting shell, and the cooling mounting shell is internally provided with a motor mounting cavity; the inner wall of the motor mounting cavity is fixedly connected with a shock pad, and a sealing cover is arranged at the end of the cooling mounting shell. Through collaborative design of the cooling mechanism and the preheating branch, waste heat generated by operation of the servo motor is efficiently recycled, a semiconductor cooler is matched with a cooling pipe to absorb heat of the motor, a heat exchanger transmits the heat to hydraulic oil to be preheated through a first preheating pipe and a second preheating pipe, the temperature of the hydraulic oil is increased to a proper working range, waste heat emission is reduced, and the service life of the servo motor is prolonged. And additional preheating energy consumption during low-temperature starting of the hydraulic oil is omitted, and the energy utilization rate is remarkably increased.

Description

Technical Field

[0001] This invention relates to the field of servo oil pump technology, and more specifically to a servo oil pump motor assembly structure. Background Technology

[0002] Traditional servo hydraulic pump motor units are the core power components of hydraulic systems, widely used in CNC machine tools, injection molding machines, construction machinery, and other fields. They typically consist of a servo motor and an oil pump connected by a coupling, providing pressurized oil to hydraulic actuators (such as hydraulic cylinders and hydraulic motors) to achieve precise speed and force control. They are a key component ensuring the automated operation of equipment.

[0003] However, in precision manufacturing scenarios with variable loads and complex operating conditions, such as multi-process CNC machine tools, traditional motor cooling systems only passively dissipate the waste heat generated by the motor operation without recycling it. Furthermore, hydraulic oil requires additional energy to preheat during low-temperature startup to reduce viscosity, resulting in significant energy waste. At the same time, the drive structure is mostly based on a fixed transmission ratio, and relying solely on the servo motor's own speed adjustment is insufficient to adapt to different load requirements, easily leading to problems such as response lag and insufficient control precision, which affect the operating efficiency and processing quality of the hydraulic system. Summary of the Invention

[0004] This invention provides a servo oil pump motor assembly structure to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: A servo oil pump motor assembly structure includes a mounting mechanism, which includes a mounting base plate. A cooling mounting shell is fixedly connected to the top of the mounting base plate. A motor mounting cavity is provided inside the cooling mounting shell. A shock-absorbing pad is fixedly connected to the inner wall of the motor mounting cavity. A sealing cover is provided at the end of the cooling mounting shell. A servo motor drive mechanism includes a servo motor, which is installed inside the motor mounting cavity. One end of the servo motor shaft is fixedly connected to a drive gear set. An oil pump mechanism includes a pump body. An oil inlet pipe is provided on one side of the pump body cavity, and an oil outlet pipe with a built-in valve is provided on the other side of the pump body cavity. An oil pump rotor is rotatably connected inside the pump body. A cooling mechanism includes a cooling cavity. A semiconductor cooler is fixedly connected to the top of the cooling cavity cavity. A heat-absorbing end is provided at the bottom of the semiconductor cooler, and a heat-releasing end is provided at the top of the semiconductor cooler. A cooling pipe is provided on one side of the cooling cavity cavity cavity.

[0006] A further improvement of the technical solution of the present invention is that: the drive gear set includes a drive gear, a small drive gear and a large drive gear, and a shift fork assembly is engaged on the surface of the drive gear.

[0007] A further improvement of the technical solution of the present invention is that: the shift fork assembly includes a driven gear set, the surface of the driven gear set is rotatably connected to a shift fork, the end of the shift fork is fixedly connected to a drive block, and the drive block is slidably connected to a slide rail.

[0008] A further improvement of the technical solution of the present invention is that: a screw is internally threaded to the drive block, a drive motor is provided at the end of the screw, a drive shaft is inserted into the driven gear set, and one end of the drive shaft is fixedly connected to the inside of the oil pump rotor.

[0009] A further improvement of the technical solution of the present invention is that: the driven gear set includes a driven gear, a small driven gear and a large driven gear, wherein the driven gear corresponds to the driving gear, the small driven gear corresponds to the large driving gear, and the large driven gear corresponds to the small driving gear.

[0010] A further improvement of the technical solution of the present invention is that: the cooling mechanism further includes a circulation pump, the circulation pump is set at one end of the cooling pipe near the cooling chamber, the middle part of the cooling pipe is distributed in an irregular spiral shape inside the cooling mounting shell, and the gap is filled with thermally conductive silicone grease.

[0011] A further improvement of the technical solution of the present invention is that: a heat exchanger is provided at the other end of the cooling pipe, a guide plate is provided inside the heat exchanger, a connecting hole is opened on the surface of the guide plate, a coolant flow chamber is provided between the guide plates, a return pipe is provided at the top of the inner cavity of the coolant flow chamber, and one end of the return pipe is connected to one side of the inner cavity of the cooling chamber.

[0012] A further improvement of the technical solution of the present invention is that: a preheating oil outlet is provided above the end of the heat exchanger inner cavity, a first preheating pipe is provided on one side of the preheating oil outlet inner cavity, a preheating pipe connecting cavity is provided at the end of the first preheating pipe, a second preheating pipe is provided on one side of the lower end of the preheating pipe connecting cavity, a cold oil inlet is provided at the end of the second preheating pipe, and multiple sets of the first preheating pipe and the second preheating pipe are provided.

[0013] A further improvement of the technical solution of the present invention is that the oil pump mechanism further includes a preheating branch pipe with a built-in valve, one end of the preheating branch pipe is connected to the interior of the oil outlet pipe, and the other end of the preheating branch pipe is connected to the interior of the cold oil inlet.

[0014] Due to the adoption of the above technical solution, the technical progress achieved by this invention compared to the prior art is as follows: This invention provides a servo oil pump motor assembly structure. Through the coordinated design of the cooling mechanism and the preheating branch, the waste heat generated by the servo motor is efficiently recovered: a semiconductor cooler, in conjunction with a cooling pipe, absorbs the heat from the motor, and a heat exchanger transfers the heat to the hydraulic oil to be preheated through first and second preheating pipes, raising the hydraulic oil temperature to a suitable operating range. This not only reduces waste heat emission but also eliminates the additional preheating energy consumption during low-temperature hydraulic oil startup, significantly improving energy utilization. Simultaneously, it avoids wear on the hydraulic system caused by low-temperature, high-viscosity conditions. Furthermore, the multi-gear engagement structure of the drive gear set and driven gear set, combined with the switching function of the shift fork assembly, provides multiple drive ratios. Combined with the precise speed adjustment of the servo motor, this achieves dual regulation of "speed + transmission ratio," enabling the hydraulic system to obtain optimal response speed and control accuracy under different load conditions. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the main structure of the present invention; Figure 2 This is a side view of the present invention; Figure 3 This is an exploded structural diagram of the present invention; Figure 4 This is a schematic diagram of the cooling mechanism of the present invention; Figure 5 This is a schematic diagram of the servo motor drive mechanism of the present invention; Figure 6 This is a cross-sectional view of the heat exchanger structure of the present invention.

[0016] In the diagram: 11. Mounting base plate; 12. Cooling mounting shell; 13. Sealing cover; 14. Motor mounting cavity; 15. Vibration damping pad; 21. Servo motor; 22. Small drive gear; 23. Drive gear; 24. Large drive gear; 25. Driven gear set; 26. Shift fork; 27. Drive shaft; 28. Drive block; 29. ​​Slide rail; 210. Screw; 211. Drive motor; 31. Pump body; 32. Oil inlet pipe; 33. 34. Oil outlet pipe; 35. Oil pump rotor; 46. Preheating branch pipe; 47. Cooling chamber; 48. Semiconductor refrigerator; 49. Heat absorption end; 40. Heat release end; 41. Cooling pipe; 42. Circulating pump; 43. Heat exchanger; 44. Baffle plate; 45. Connecting hole; 46. Return pipe; 47. Preheating pipe connecting chamber; 48. Second preheating pipe; 49. Cold oil inlet. Detailed Implementation

[0017] The present invention will be further described in detail below with reference to embodiments: Example 1, as Figures 1-6As shown, the present invention provides a servo oil pump motor assembly structure, including a mounting mechanism. The mounting mechanism includes a mounting base plate 11, a cooling mounting shell 12 fixedly connected to the top of the mounting base plate 11, a motor mounting cavity 14 provided inside the cooling mounting shell 12, a shock-absorbing pad 15 fixedly connected to the inner wall of the motor mounting cavity 14, and a sealing cover 13 provided at the end of the cooling mounting shell 12; a servo motor drive mechanism, including a servo motor 21, which is installed inside the motor mounting cavity 14, and one end of the servo motor 21's shaft is fixedly... A fixed drive gear set is provided; an oil pump mechanism is provided, including a pump body 31, an oil inlet pipe 32 is provided on one side of the inner cavity of the pump body 31, an oil outlet pipe 33 with a built-in valve is provided on the other side of the inner cavity of the pump body 31, and an oil pump rotor 34 is rotatably connected inside the pump body 31; a cooling mechanism is provided, including a cooling chamber 41, a semiconductor cooler 42 is fixedly connected to the top of the cooling chamber 41, a heat absorption end 43 is provided at the bottom of the semiconductor cooler 42, a heat release end 44 is provided at the top of the semiconductor cooler 42, and a cooling pipe 45 is provided on one side of the inner cavity of the cooling chamber 41.

[0018] In this embodiment, the cooling mounting shell 12 is securely fixed by the mounting base 11, providing a protective space for the internal components. The motor mounting cavity 14 inside the cooling mounting shell 12 contains a built-in shock-absorbing pad 15, which absorbs vibrations from the motor operation and prevents them from being transmitted to other mechanisms. A sealing cover 13 seals the end of the cooling mounting shell to prevent dust and oil from entering, ensuring internal cleanliness. Upon startup, the controller starts the drive motor 211 according to the hydraulic system load requirements, causing the screw 210 to rotate. The drive block 28, threadedly connected to the screw, moves linearly along the slide rail 29, thereby driving the shift fork 26 to push the driven gear set 25 to slide along the drive shaft 27. The driven gear set 25 includes a driven gear, a small driven gear, and a large driven gear, which precisely mesh with the drive gear set 23, the large drive gear 24, and the small drive gear 22, respectively, to achieve multiple transmission ratio switching: under heavy load, the large driven gear meshes with the small drive gear; under light load and high speed, the small driven gear meshes with the large drive gear; and under normal working conditions, the driven gear meshes with the drive gear to meet the power requirements of different loads. After the gears are fully engaged, the screw self-locks to fix the transmission ratio.

[0019] Example 2, as Figures 1-6As shown, based on Embodiment 1, the present invention provides a technical solution: Preferably, the drive gear set includes a drive gear 23, a small drive gear 22, and a large drive gear 24. A shift fork assembly meshes with the surface of the drive gear 23. The shift fork assembly includes a driven gear set 25. A shift fork 26 is rotatably connected to the surface of the driven gear set 25. A drive block 28 is fixedly connected to the end of the shift fork 26. A slide rail 29 is slidably connected inside the drive block 28. A screw 210 is threadedly connected inside the drive block 28. A drive motor 211 is provided at the end of the screw 210. A drive shaft 27 is inserted into the gear set 25. One end of the drive shaft 27 is fixedly connected to the inside of the oil pump rotor 34. The driven gear set 25 includes a driven gear, a small driven gear and a large driven gear. The driven gear corresponds to the drive gear 23, the small driven gear corresponds to the large drive gear 24, and the large driven gear corresponds to the small drive gear 22. The cooling mechanism also includes a circulating pump 46. The circulating pump 46 is located at one end of the cooling pipe 45 near the cooling chamber 41. The middle part of the cooling pipe 45 is distributed in an irregular spiral shape inside the cooling mounting shell 12, and the gaps are filled with thermally conductive silicone grease.

[0020] In this embodiment, the cooling mounting shell 12 is securely fixed by the mounting base 11, providing a protective space for the internal components. The motor mounting cavity 14 inside the cooling mounting shell 12 contains a built-in shock-absorbing pad 15, which absorbs vibrations from the motor operation and prevents them from being transmitted to other mechanisms. A sealing cover 13 seals the end of the cooling mounting shell to prevent dust and oil from entering, ensuring internal cleanliness. Upon startup, the controller starts the drive motor 211 according to the hydraulic system load requirements, causing the screw 210 to rotate. The drive block 28, threadedly connected to the screw, moves linearly along the slide rail 29, thereby driving the shift fork 26 to push the driven gear set 25 to slide along the drive shaft 27. The driven gear set 25 includes a driven gear, a small driven gear, and a large driven gear, which precisely mesh with the drive gear set 23, the large drive gear 24, and the small drive gear 22, respectively, to achieve multiple transmission ratio switching: under heavy load, the large driven gear meshes with the small drive gear; under light load and high speed, the small driven gear meshes with the large drive gear; and under normal working conditions, the driven gear meshes with the drive gear to meet the power requirements of different loads. After the gears are fully engaged, the screw self-locks to fix the transmission ratio.

[0021] Example 3, as Figures 1-6As shown, based on Embodiment 1, the present invention provides a technical solution: Preferably, a heat exchanger 47 is provided at the other end of the cooling pipe 45, a guide plate 48 is provided inside the heat exchanger 47, a connecting hole 49 is opened on the surface of the guide plate 48, a coolant flow chamber is formed between the guide plates 48, a return pipe 410 is provided at the top of the inner cavity of the coolant flow chamber, one end of the return pipe 410 is connected to one side of the inner cavity of the cooling chamber 41, a preheating oil outlet 411 is provided above the end of the inner cavity of the heat exchanger 47, and the inner cavity of the preheating oil outlet 411... A first preheating pipe 412 is provided on one side, and a preheating pipe connecting cavity 413 is provided at the end of the first preheating pipe 412. A second preheating pipe 414 is provided on one side of the lower end of the preheating pipe connecting cavity 413. A cold oil inlet 415 is provided at the end of the second preheating pipe 414. Multiple sets of the first preheating pipe 412 and the second preheating pipe 414 are provided. The oil pump mechanism also includes a preheating branch pipe 35 with a built-in valve. One end of the preheating branch pipe 35 is connected to the inside of the oil outlet pipe 33, and the other end of the preheating branch pipe 35 is connected to the inside of the cold oil inlet 415.

[0022] In this embodiment, when hydraulic oil needs to be preheated, the valve inside the oil outlet pipe 33 is closed, and the valve inside the preheating branch pipe 35 is opened. The coolant carrying residual heat flows into the heat exchanger 47 and exchanges heat with the low-temperature hydraulic oil entering through the cold oil inlet 415. The cold oil flows through the second preheating pipe 414, the preheating pipe connecting cavity 413, and the first preheating pipe 412, absorbs heat from the coolant, and then flows out from the preheating oil outlet 411, avoiding wear of the pipeline by the low-temperature, high-viscosity oil. The coolant after heat exchange flows back to the cooling chamber through the return pipe 410, completing the circulation. After the operation is completed, the semiconductor cooler and the circulating pump continue to run for a period of time to ensure that the motor is fully cooled. The entire process achieves integrated coordination of power output, load adaptation, cooling and heat dissipation, and waste heat recovery.

[0023] The working principle of this servo oil pump motor assembly will be explained in detail below.

[0024] like Figures 1-6As shown, the equipment is securely fixed by the mounting base plate 11. The cooling mounting shell 12 provides a protective space for the internal components. The motor mounting cavity 14 inside has a built-in shock-absorbing pad 15, which absorbs the vibration of the motor operation and prevents it from being transmitted to other mechanisms. The sealing cover 13 seals the end of the cooling mounting shell to prevent dust and oil from entering and to ensure internal cleanliness. After startup, the controller starts the drive motor 211 to drive the screw 210 to rotate according to the load requirements of the hydraulic system. The drive block 28, which is threaded to the screw, moves linearly along the slide rail 29, thereby driving the shift fork 26 to push the driven gear set 25 to slide along the drive shaft 27. The driven gear set 25, comprising a driven gear, a small driven gear, and a large driven gear, precisely meshes with the drive gear set 23, the large drive gear 24, and the small drive gear 22, respectively, to achieve multiple transmission ratio switching: under heavy load, the large driven gear meshes with the small drive gear; under light load and high speed, the small driven gear meshes with the large drive gear; and under normal operating conditions, the driven gear meshes with the drive gear, meeting the power requirements of different loads. After the gears are fully engaged, the screw self-locks to fix the transmission ratio. Once the transmission ratio is determined, the servo motor 21 starts, and its shaft drives the drive gear set to rotate. Power is transmitted to the drive shaft 27 through the meshing driven gear set, and the drive shaft drives the oil pump rotor 34 to rotate at high speed within the pump body 31. The rotation of the oil pump rotor creates a negative pressure in the pump chamber, drawing in hydraulic oil through the inlet pipe 32. The oil is then squeezed, and the high-pressure oil is output to the hydraulic system through the outlet pipe 33 with a built-in valve, providing power to the actuators. During equipment operation, the semiconductor cooler 42 starts synchronously, and its heat-absorbing end 43 absorbs heat from the coolant in the cooling chamber 41. The circulating pump 46 drives the coolant to flow through the cooling pipe 45, which is distributed in an irregular spiral shape inside the cooling mounting shell. The thermally conductive silicone grease filling the gaps enhances the thermal conductivity and quickly removes the heat from the motor. When the hydraulic oil needs to be preheated, the valve in the oil outlet pipe 33 is closed and the valve in the preheating branch pipe 35 is opened. The coolant carrying residual heat flows into the heat exchanger 47 and exchanges heat with the low-temperature hydraulic oil that enters through the cold oil inlet 415. The cold oil flows through the second preheating pipe 414, the preheating pipe connecting chamber 413, and the first preheating pipe 412. After absorbing heat from the coolant, it flows out from the preheating oil outlet 411, avoiding wear of the pipeline by the low-temperature, high-viscosity oil. The coolant after heat exchange flows back to the cooling chamber through the return pipe 410, completing the circulation. After the operation is completed, the semiconductor cooler and circulating pump continue to run for a period of time to ensure that the motor is fully cooled. The whole process achieves integrated coordination of power output, load adaptation, cooling and heat dissipation and waste heat recovery.

[0025] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A servo oil pump motor assembly structure, characterized in that: include The installation mechanism includes an installation base plate (11), a cooling installation shell (12) is fixedly connected to the top of the installation base plate (11), a motor installation cavity (14) is provided inside the cooling installation shell (12), a shock-absorbing pad (15) is fixedly connected to the inner wall of the motor installation cavity (14), and a sealing cover (13) is provided at the end of the cooling installation shell (12). The servo motor drive mechanism includes a servo motor (21), which is installed inside the motor mounting cavity (14). One end of the shaft of the servo motor (21) is fixedly connected to a drive gear set. The oil pump mechanism includes a pump body (31), an oil inlet pipe (32) is provided on one side of the inner cavity of the pump body (31), and an oil outlet pipe (33) with a built-in valve is provided on the other side of the inner cavity of the pump body (31). The pump body (31) is rotatably connected to the oil pump rotor (34). The cooling mechanism includes a cooling cavity (41), a semiconductor cooler (42) is fixedly connected to the top of the cooling cavity (41), a heat-absorbing end (43) is provided at the bottom of the semiconductor cooler (42), a heat-releasing end (44) is provided at the top of the semiconductor cooler (42), and a cooling pipe (45) is provided on one side of the inner cavity of the cooling cavity (41).

2. The servo oil pump motor assembly structure according to claim 1, characterized in that: The drive gear set includes a drive gear (23), a small drive gear (22) and a large drive gear (24), and the surface of the drive gear (23) is engaged with a shift fork assembly.

3. The servo oil pump motor assembly structure according to claim 2, characterized in that: The shift fork assembly includes a driven gear set (25), a shift fork (26) is rotatably connected to the surface of the driven gear set (25), a drive block (28) is fixedly connected to the end of the shift fork (26), and a slide rail (29) is slidably connected inside the drive block (28).

4. The servo oil pump motor assembly structure according to claim 3, characterized in that; The drive block (28) is internally threaded with a screw (210), and a drive motor (211) is provided at the end of the screw (210). A drive shaft (27) is inserted into the driven gear set (25), and one end of the drive shaft (27) is fixedly connected to the inside of the oil pump rotor (34).

5. The servo oil pump motor assembly structure according to claim 3, characterized in that: The driven gear set (25) includes a driven gear, a small driven gear and a large driven gear. The driven gear corresponds to the driving gear (23), the small driven gear corresponds to the large driving gear (24), and the large driven gear corresponds to the small driving gear (22).

6. The servo oil pump motor assembly structure according to claim 1, characterized in that: The cooling mechanism also includes a circulation pump (46), which is located at one end of the cooling pipe (45) near the cooling chamber (41). The middle part of the cooling pipe (45) is distributed in an irregular spiral shape inside the cooling mounting shell (12), and the gaps are filled with thermally conductive silicone grease.

7. The servo oil pump motor assembly structure according to claim 1, characterized in that: A heat exchanger (47) is provided at the other end of the cooling pipe (45). A guide plate (48) is provided inside the heat exchanger (47). A connecting hole (49) is provided on the surface of the guide plate (48). A coolant flow chamber is provided between the guide plates (48). A return pipe (410) is provided at the top of the inner cavity of the coolant flow chamber. One end of the return pipe (410) is connected to one side of the inner cavity of the cooling chamber (41).

8. The servo oil pump motor assembly structure according to claim 7, characterized in that: A preheating oil outlet (411) is provided above the inner end of the heat exchanger (47). A first preheating pipe (412) is provided on one side of the inner cavity of the preheating oil outlet (411). A preheating pipe connecting cavity (413) is provided at the end of the first preheating pipe (412). A second preheating pipe (414) is provided on one side of the lower end of the inner cavity of the preheating pipe connecting cavity (413). A cold oil inlet (415) is provided at the end of the second preheating pipe (414). Multiple sets of the first preheating pipe (412) and the second preheating pipe (414) are provided.

9. The servo oil pump motor assembly structure according to claim 1, characterized in that: The oil pump mechanism also includes a preheating branch pipe (35) with a built-in valve. One end of the preheating branch pipe (35) is connected to the inside of the oil outlet pipe (33), and the other end of the preheating branch pipe (35) is connected to the inside of the cold oil inlet (415).

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