Bidirectional speed-increasing oil pump

Abstract

The utility model relates to a two-way speed-increasing oil pump which comprises a pump body, a rotating shaft is arranged in the pump body, the rotating shaft is sleeved with an oil guiding structure for guiding the oil flow direction, the oil guiding structure comprises a sun gear arranged on one side of the rotating shaft, a plurality of planet gears are arranged on the periphery of the sun gear, the planet gears are meshed with the sun gear, and the planet gears are meshed with the sun gear. An inner gear ring meshed with the planet gear is arranged on the inner wall of the pump body, an eccentric wheel is arranged on one side of the sun gear, and a first oil port and a second oil port are formed in the positions, located on the two sides of the eccentric wheel, of the pump body respectively. The arrangement of the planet gear and the sun gear accelerates the rotating speed of the eccentric wheel in the oil pump so as to improve the oil pumping flow of the shaft end oil pump.

Description

TECHNICAL FIELD

[0001] The utility model relates to oil pump technical field, concretely relates to a bidirectional speed increasing oil pump. BACKGROUND

[0002] The speed reducer oil pump is a device for lubricating and cooling the internal gear and bearing of the speed reducer, which is used for pumping lubricating oil from the oil pool or external oil tank through the driving mechanism and delivering it to the key parts of the speed reducer to reduce friction, wear and tear and prolong the service life of the equipment. It usually adopts gear pump, vane pump or screw pump structure, has the characteristics of high efficiency, stability and low noise, and can adapt to the lubrication demand under different working conditions. The operation of the speed reducer oil pump not only ensures the normal operation of the speed reducer, but also effectively prevents the overheating of the equipment through circulating cooling, and is widely used in industrial machinery, automation equipment and heavy load vehicles.

[0003] The planetary speed reducer with a cooling and lubricating system disclosed in the publication No. CN217108129U comprises a box body, a box body oil outlet, a box body oil return port and an input end lubricating port arranged on the box body, a cooling and lubricating system arranged on the box body, a cooling module and an oil distributor, the cooling module comprising a motor oil pump assembly and a cooling assembly, the motor oil pump assembly comprising a motor and an oil pump, the cooling assembly comprising a heat exchanger and a cooling fan, the oil distributor being provided with a first interface connected with the box body oil return port, a second interface connected with the heat exchanger and a third interface connected with the input end lubricating port, the three interfaces being in communication with each other, the cooling and lubricating system being high in integration degree and capable of being installed and used as a universal module, and having two circulating cooling circuits for cooling and lubricating the inside of the planetary speed reducer and the input end. This technology directly drives the gear through the input shaft to realize the pumping in and pumping out of the lubricating oil, and the flow of the lubricating oil is greatly affected by the speed of the input shaft. When the speed of the input shaft is low, the flow of the lubricating oil will be significantly reduced, which will lead to insufficient lubrication of the speed reducer and accelerate the wear of the bearing or gear. Therefore, this technology still has room for improvement. SUMMARY

[0004] The utility model provides a bidirectional speed increasing oil pump to solve the technical problem of the prior art.

[0005] To achieve the above object, the utility model provides the following technical scheme, a bidirectional speed increasing oil pump, including the pump body, be equipped with rotating shaft in the pump body, the rotating shaft sleeve is equipped with the oil guide structure that guides to oil flow direction, its characterized in that: the oil guide structure includes the sun gear of setting up in rotating shaft one side, the sun gear outer periphery is equipped with a plurality of planetary gears, the planetary gear is engaged with the sun gear, the inner toothed ring that the pump body inner wall is equipped with and is engaged with the planetary gear, one side of the sun gear is equipped with the eccentric wheel, the pump body is located eccentric wheel both sides and is set up first oil port and second oil port respectively.

[0006] Using the above technical solution, when the rotating shaft rotates, it drives the planetary gears to revolve around the sun gear along the internal gear ring on the pump body. The sun gear then undergoes a first-stage speed increase. The sun gear is connected to the eccentric gear, which drives the eccentric gear to rotate. During the rotation of the eccentric gear, it drives the lubricating oil to be pumped in and out of the first and second oil ports. When the eccentric gear rotates clockwise, the oil cavity at the first oil port gradually increases while the oil cavity at the second oil port gradually decreases. At this time, oil enters at the first oil port and exits at the second oil port. When the eccentric gear rotates counterclockwise, the oil cavity at the second oil port gradually increases while the oil cavity at the first oil port gradually decreases. At this time, oil enters at the second oil port and exits at the first oil port, thus achieving bidirectional oil pumping. At the same time, the arrangement of the planetary gears and the sun gear accelerates the rotational speed of the eccentric gear in the oil pump, thereby increasing the oil flow rate of the shaft-end oil pump.

[0007] The aforementioned bidirectional speed-increasing oil pump can be further configured such that: a planetary gear carrier is fixedly installed on one side of the rotating shaft, the outer periphery of the planetary gear carrier is provided with several connecting columns for planetary gears to be fitted, and the center of the planetary gear carrier is provided with a positioning ring for positioning and installing the sun gear.

[0008] With the above technical solution, the planetary gear carrier is fixed to one side of the rotating shaft, providing support for the planetary gears; the positioning ring is set at the center of the planetary gear carrier, providing an installation reference for the sun gear, ensuring the meshing of the sun gear and planetary gears, improving transmission efficiency and stability, and at the same time, the setting of the positioning ring improves the wear resistance when the planetary gear carrier and the sun gear rotate relative to each other.

[0009] The aforementioned bidirectional speed-increasing oil pump can be further configured such that: a full complement cylindrical roller bearing is provided between the connecting column and the planetary gear; a shaft retaining circlip for fixing the full complement cylindrical roller bearing is also provided between the full complement cylindrical roller bearing and the connecting column; and the full complement cylindrical roller bearing and the planetary gear are fixed together by a retaining circlip with a hole.

[0010] By adopting the above technical solution, the full complement cylindrical roller bearing reduces the frictional resistance between the connecting column and the planetary gears. The shaft snap ring is fixed between the full complement cylindrical roller bearing and the connecting column, ensuring the stability of the bearing during high-speed operation and preventing axial displacement or detachment. The hole snap ring firmly connects the full complement cylindrical roller bearing and the planetary gears, further ensuring the reliability of the transmission system.

[0011] The aforementioned bidirectional speed-increasing oil pump can be further configured such that: a first mounting cavity and a second mounting cavity are respectively provided at the connection between the pump body and the rotating shaft; an O-ring is provided in the first mounting cavity; and a first tapered roller bearing is provided in the second mounting cavity.

[0012] By adopting the above technical solution, the O-ring seal prevents oil leakage at the connection between the pump body and the rotating shaft, ensuring the normal operation of the hydraulic system inside the oil pump; the first tapered roller bearing bears the radial and axial loads of the rotating shaft, reducing frictional resistance and improving transmission efficiency and service life.

[0013] The aforementioned bidirectional speed-increasing oil pump can be further configured as follows: the sun gear is provided with an involute spline on the side away from the positioning ring, the eccentric wheel is sleeved on the involute spline, the pump body is fixedly installed with a pressure cap on one side of the eccentric wheel, a third mounting cavity is provided between the pressure cap and the eccentric wheel, and a second tapered roller bearing is provided in the third mounting cavity.

[0014] With the above technical solution, the involute spline is set at the center of the sun gear, providing power transmission for the eccentric wheel and ensuring bidirectional oil delivery of the oil pump during forward and reverse rotation. The second tapered roller bearing in the third mounting cavity effectively supports the eccentric wheel, bearing radial and axial loads, thereby improving the load-bearing capacity and service life of the transmission system.

[0015] The aforementioned bidirectional speed-increasing oil pump can be further configured such that: the pump body has an annular positioning protrusion on the side facing the pressure plate, and both the pressure plate and the annular positioning protrusion have mounting holes for fixing bolts.

[0016] Using the above technical solution, the annular positioning protrusion provides a positioning reference for the gland, ensuring a tight fit between the gland and the pump body. The fixing bolts in the mounting hole firmly fix the gland to the pump body, preventing loosening or displacement caused by vibration or pressure.

[0017] The aforementioned bidirectional speed-increasing oil pump can be further configured such that crescent grooves are provided at both the first oil hole and the second oil hole of the pump body.

[0018] By adopting the above technical solution, the arc-shaped structure of the crescent groove increases the volume around the oil hole, promotes the flow and distribution of oil, reduces local pressure concentration and eddy current phenomenon, thereby improving oil delivery efficiency and improving the hydraulic performance of the oil pump.

[0019] The aforementioned bidirectional speed-increasing oil pump can be further configured such that: a shaft hole for connecting an external motor is provided at the center of the rotating shaft, and a plurality of fixing holes for fixing the motor are provided on the side of the pump body facing the rotating shaft.

[0020] Using the above technical solution, the shaft hole at the center of the rotating shaft provides a docking interface for the external motor, ensuring the coaxiality of the motor shaft and the rotating shaft. The fixing hole on the side of the pump body facing the rotating shaft facilitates the secure fixing of the motor to the pump body with bolts, preventing the motor from shifting or loosening due to vibration or external force.

[0021] The beneficial effects of this utility model are as follows: when the rotating shaft rotates, it drives the planetary gears to rotate around the sun gear along the internal gear ring on the pump body. The sun gear then undergoes a first-stage speed increase. Due to the arrangement of the planetary gears and the sun gear, the rotation speed of the eccentric wheel in the oil pump is accelerated, thereby increasing the oil flow rate of the shaft-end oil pump. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of this utility model;

[0023] Figure 2 This is an enlarged view of the structure at point A of this utility model;

[0024] Figure 3 This is a structural diagram of the oil port of this utility model;

[0025] Figure 4 This is a diagram of the oil guiding structure of this utility model;

[0026] Figure 5 This is a structural diagram of the pump body of this utility model;

[0027] Label annotations: 1-Pump body, 2-Rotating shaft, 3-Sun gear, 4-Planet gear, 5-Internal gear ring, 6-Eccentric gear, 7-First oil port, 8-Second oil port, 9-Planet gear carrier, 10-Connecting column, 11-Locking ring, 12-Full complement cylindrical roller bearing, 13-Shaft snap ring, 14-Bore snap ring, 15-First mounting cavity, 16-Second mounting cavity, 17-O-ring seal, 18-First tapered roller bearing, 19-Involute spline, 20-Glander cap, 21-Third mounting cavity, 22-Second tapered roller bearing, 23-Annular positioning protrusion, 24-Fixing bolt, 25-Mounting hole, 26-Crescent groove, 27-Shaft hole, 28-Fixing hole. Detailed Implementation

[0028] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

[0029] like Figures 1-5The present invention provides the following technical solution: a bidirectional speed-increasing oil pump, comprising a pump body 1, a rotating shaft 2 inside the pump body 1, and an oil guiding structure for guiding oil flow on the rotating shaft 2. The oil guiding structure includes a sun gear 3 disposed on one side of the rotating shaft 2, and a plurality of planet gears 4 disposed on the outer periphery of the sun gear 3, the planet gears 4 meshing with the sun gear 3. An internal gear ring 5 meshing with the planet gears 4 is disposed on the inner wall of the pump body 1. An eccentric wheel 6 is disposed on one side of the sun gear 3. A first oil port 7 and a second oil port 8 are respectively opened on both sides of the eccentric wheel 6 on the pump body 1. When the rotating shaft 2 rotates, it drives the planet gears 4 to rotate around the sun gear 3 along the internal gear ring 5 on the pump body 1, thus the sun gear 3 undergoes a first-stage speed increase. The sun gear 3 is connected to the eccentric wheel 6. The sun gear 3 drives the eccentric gear 6 to rotate. During the rotation of the eccentric gear 6, the lubricating oil at the first oil port 7 and the second oil port 8 is pumped in and out. When the eccentric gear 6 rotates clockwise, the oil cavity at the first oil port 7 gradually increases while the oil cavity at the second oil port 8 gradually decreases, resulting in oil entering through the first oil port 7 and exiting through the second oil port 8. Conversely, when the eccentric gear 6 rotates counterclockwise, the oil cavity at the second oil port 8 gradually increases while the oil cavity at the first oil port 7 gradually decreases, again resulting in oil entering through the second oil port 8 and exiting through the first oil port 7. This achieves bidirectional oil pumping. Furthermore, the planetary gears 4 and the sun gear 3 increase the rotational speed of the eccentric gear 6 in the oil pump, thereby increasing the oil flow rate of the shaft-end oil pump. A planetary gear carrier 9 is fixedly mounted on one side of the rotating shaft 2. Several connecting posts 10 are provided around the outer periphery of the planetary gear carrier 9 for mounting the planetary gears 4. A positioning ring 11 is located at the center of the planetary gear carrier 9 for positioning and mounting the sun gear 3. The planetary gear carrier 9 is fixed to one side of the rotating shaft 2, providing support for the planetary gears 4. The positioning ring 11, located at the center of the planetary gear carrier 9, provides an installation reference for the sun gear 3, ensuring the meshing of the sun gear 3 and the planetary gears 4, improving transmission efficiency and stability. Simultaneously, the positioning ring 11 enhances the wear resistance of the planetary gear carrier 9 and the sun gear 3 during relative rotation. A full complement cylindrical roller bearing 12 is provided between the connecting column 10 and the planetary gear 4. A shaft retainer 13 for fixing the full complement cylindrical roller bearing 12 is also provided between the full complement cylindrical roller bearing 12 and the connecting column 10. The full complement cylindrical roller bearing 12 and the planetary gear 4 are fixed together by a retainer 14 with a hole. The full complement cylindrical roller bearing 12 reduces the frictional resistance between the connecting column 10 and the planetary gear 4. The shaft retainer 13 is fixed between the full complement cylindrical roller bearing 12 and the connecting column 10, ensuring the stability of the bearing during high-speed operation and preventing axial displacement or detachment. The retainer 14 with the hole firmly connects the full complement cylindrical roller bearing 12 and the planetary gear 4, further ensuring the reliability of the transmission system.

[0030] like Figures 1-5The present invention provides the following technical solution: a bidirectional speed-increasing oil pump, wherein a first mounting cavity 15 and a second mounting cavity 16 are respectively provided at the connection between the pump body 1 and the rotating shaft 2. An O-ring seal 17 is provided in the first mounting cavity 15, and a first tapered roller bearing 18 is provided in the second mounting cavity 16. The O-ring seal 17 prevents oil leakage at the connection between the pump body 1 and the rotating shaft 2, ensuring the normal operation of the hydraulic system inside the oil pump; the first tapered roller bearing 18 bears the radial and axial loads of the rotating shaft 2, reducing frictional resistance and improving transmission efficiency and service life. An involute spline 19 is located at the center of the sun gear 3, away from the locating ring 11. An eccentric wheel 6 is fitted onto the involute spline 19. A pressure cap 20 is fixedly installed on one side of the pump body 1, located on the eccentric wheel 6. A third mounting cavity 21 is provided between the pressure cap 20 and the eccentric wheel 6. A second tapered roller bearing 22 is installed within the third mounting cavity 21. The involute spline 19, located at the center of the sun gear 3, provides power transmission to the eccentric wheel 6, ensuring bidirectional oil delivery during forward and reverse rotation. The second tapered roller bearing 22 within the third mounting cavity 21 effectively supports the eccentric wheel 6, bearing radial and axial loads, thus improving the load-bearing capacity and service life of the transmission system. The pump body 1 has an annular positioning protrusion 23 on the side facing the pressure cap 20. Both the pressure cap 20 and the annular positioning protrusion 23 have mounting holes 25 for installing fixing bolts 24. The annular positioning protrusion 23 provides a positioning reference for the pressure cap 20, ensuring a tight fit between the pressure cap 20 and the pump body 1. The fixing bolts 24 in the mounting holes 25 firmly fix the pressure cap 20 to the pump body 1, preventing loosening or displacement due to vibration or pressure. The pump body 1 has crescent grooves 26 at the first oil hole and the second oil hole. The arc-shaped structure of the crescent grooves 26 increases the volume around the oil hole, promotes the flow and distribution of oil, reduces local pressure concentration and eddy current phenomena, thereby improving oil delivery efficiency and the hydraulic performance of the oil pump. The rotating shaft 2 has a shaft hole 27 at its center for connecting an external motor. The pump body 1 has several fixing holes 28 on the side facing the rotating shaft 2 for fixing the motor. The shaft hole 27 at the center of the rotating shaft 2 provides a docking interface for the external motor, ensuring the coaxiality of the motor shaft and the rotating shaft 2. The fixing holes 28 on the side of the pump body 1 facing the rotating shaft 2 facilitate the secure fixing of the motor to the pump body 1 with bolts, preventing the motor from shifting or loosening due to vibration or external force.

[0031] The beneficial effects of this utility model are as follows: When the rotating shaft 2 rotates, it drives the planetary gear 4 to rotate around the sun gear 3 along the internal gear ring 5 on the pump body 1. The sun gear 3 then undergoes a first-stage speed increase. Due to the arrangement of the planetary gear 4 and the sun gear 3, the rotation speed of the eccentric wheel 6 in the oil pump is accelerated, thereby increasing the oil flow rate of the shaft end oil pump.

Claims

1. A bidirectional speed-increasing oil pump comprising a pump body, a rotating shaft is arranged in the pump body, the rotating shaft is sleeved with a guide oil structure for guiding the flow direction of oil, characterized in that: The oil guiding structure comprises a sun gear arranged on one side of the rotating shaft, a plurality of planetary gears arranged on the outer periphery of the sun gear, the planetary gears being engaged with the sun gear, an inner gear ring arranged on the inner wall of the pump body and engaged with the planetary gears, and an eccentric wheel arranged on one side of the sun gear, the pump body being provided with a first oil port and a second oil port on the two sides of the eccentric wheel.

2. A two-way speed increasing oil pump according to claim 1, characterized in that: A planetary gear carrier is fixedly arranged on one side of the rotating shaft, a plurality of connecting columns for sleeving the planetary gears are arranged on the outer periphery of the planetary gear carrier, and a positioning ring for positioning and installing the sun gear is arranged at the center of the planetary gear carrier.

3. A two-way speed increasing oil pump according to claim 2, characterized in that: A full complement cylindrical roller bearing is arranged between the connecting column and the planetary gear, an axle clamp spring for fixing the full complement cylindrical roller bearing is further arranged between the full complement cylindrical roller bearing and the connecting column, and the full complement cylindrical roller bearing and the planetary gear are fixed by a hole clamp spring.

4. A two-way speed increasing oil pump according to claim 3, characterized in that: First and second installation cavities are arranged at the connecting position of the pump body and the rotating shaft, an O-shaped sealing ring is arranged in the first installation cavity, and a first tapered roller bearing is arranged in the second installation cavity.

5. A two-way speed increasing oil pump according to any one of claims 1-4, characterized in that: A gradual involute spline is arranged at the center of the side of the sun gear away from the positioning ring, the eccentric wheel is sleeved on the gradual involute spline, a gland is fixedly installed on one side of the eccentric wheel of the pump body, a third installation cavity is arranged between the gland and the eccentric wheel, and a second tapered roller bearing is arranged in the third installation cavity.

6. A two-way speed increasing oil pump according to claim 5, characterized in that: An annular positioning lug is arranged on the side of the pump body facing the gland, and the gland and the annular positioning lug are both provided with installation holes for installing fixing bolts.

7. A two-way speed increasing oil pump according to claim 6, characterized in that: Lunar grooves are arranged at the first and second oil ports of the pump body.

8. A two-way speed increasing oil pump according to claim 7, characterized in that: An axle hole for connecting an external motor is arranged at the center of the rotating shaft, and a plurality of fixing holes for fixing the motor are arranged on the side of the pump body facing the rotating shaft.

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