Bidirectional inner gearing cycloid rotor pump for central oil pumping and using method thereof

Abstract

The invention provides a bidirectional internal gearing cycloid rotor pump for central oil pumping and a use method thereof. The bidirectional internal gearing cycloid rotor pump comprises an oil pump shell, an oil pipe, an epicycloid rotor and a hypocycloid rotor, the oil pump shell is provided with a first runner and a second runner. One end of the oil pipe is connected to the first runner, and the other end is connected to the lubricating oil storage cavity; the epicycloid rotor and the hypocycloid rotor are rotationally connected to the oil pump shell and are eccentrically arranged, the hypocycloid rotor is provided with a connecting shaft, the connecting shaft is provided with a central through hole, one end of the central through hole communicates with the lubricating oil storage cavity, and the other end of the central through hole communicates with the second flow channel; the hypocycloid rotor and the epicycloid rotor are connected in a meshed mode, a plurality of oil cavities isolated in the radial direction are formed in a linear sealing mode, the first flow channel is communicated with one oil cavity, and the second flow channel end is communicated with the other oil cavity. Bidirectional rotation of the hypocycloid rotor and the epicycloid rotor can be achieved, oil circulation cooling can be achieved in the bidirectional rotation process, and the use scene of the oil pump is widened.

Description

Technical Field

[0001] This invention relates to the field of hydraulic transmission technology, and more specifically, to a bidirectional internal meshing cycloidal rotor pump with a central pump oil and its method of use. Background Technology

[0002] A hydraulic pump is a device that converts input mechanical energy into output hydraulic energy by relying on changes in the volume of a sealed working space to achieve oil suction and discharge. Currently, general-purpose gear pumps on the market can be classified into screw pumps, external gear pumps, and internal gear pumps according to their meshing method. Among them, internal gear pumps can be further classified into involute internal gear pumps and cycloidal rotor pumps according to their tooth profile.

[0003] The working principle of a cycloidal rotor pump is to form two oil chambers through a line seal between the inner and outer cycloidal rotors. One low-pressure chamber acts as the suction chamber, drawing in lubricating oil. The other high-pressure chamber acts as the discharge chamber, expelling the lubricating oil. The advantages of a cycloidal rotor pump are its small size, high speed, and low noise during operation. However, due to the eccentric installation and meshing of its inner and outer cycloidal rotors, most cycloidal rotor pumps on the market are currently eccentrically installed, with the inlet and outlet ports mostly located on the sides of the pump body. This results in the pump body only being able to operate in one direction, making it unsuitable for bidirectional rotation scenarios (such as reversible transmission systems), thus limiting its application range. The eccentric structure also leads to a larger pump body mass, and the lateral arrangement of the inlet and outlet ports increases pipeline complexity, hindering compact design. Summary of the Invention

[0004] (a) Technical problems to be solved The technical problem to be solved by the present invention is that most cycloidal rotor pumps on the market are eccentrically installed, with the inlet and outlet ports mostly arranged on the two sides of the pump body, and the pump body can only rotate in one direction. The inlet and outlet ports are fixed, and the pump body has a large mass.

[0005] (II) Technical Solution To achieve the above objectives, the technical solution adopted by the present invention is as follows: In a first aspect, the present invention provides a bidirectional internal meshing cycloidal rotor pump with a central pump, comprising an oil pump housing, an oil pipe, an outer cycloidal rotor, and an inner cycloidal rotor; the oil pump housing has a first flow channel and a second flow channel; one end of the oil pipe is connected to the first flow channel, and the other end of the oil pipe is connected to the lubricating oil storage chamber of a gearbox; the outer cycloidal rotor is rotatably connected to the oil pump housing, and the outer cycloidal rotor has N first gear teeth; the inner cycloidal rotor is rotatably connected to the oil pump housing, and the rotation center of the outer cycloidal rotor is eccentrically set with respect to the rotation center of the inner cycloidal rotor. The pump has N-1 second gear teeth. The inner cycloidal rotor has a connecting shaft connected to the input end of the gearbox. The connecting shaft has a central through hole. One end of the central through hole is connected to the lubricating oil storage chamber of the gearbox, and the other end is connected to the second flow channel. The inner cycloidal rotor and the outer cycloidal rotor mesh and are connected in a line seal to form multiple radially isolated oil chambers. The end of the first flow channel away from the oil pipe is connected to one of the oil chambers, and the end of the second flow channel away from the central through hole is connected to another oil chamber. This technical solution enables the pump to operate stably in both clockwise and counterclockwise rotations, breaking through the unidirectional limitation of traditional cycloidal rotor pumps and making the pump suitable for reversible transmission systems (such as wind power pitch systems), thus broadening its application scenarios. The central through hole serves as the pump oil path, shortening the oil flow distance and reducing pressure loss, thereby improving the circulation efficiency of the lubricating oil. The coaxial rotor and flow channel integrated design reduces the pump body size and weight, making it easier to integrate into a compact space.

[0006] Preferably, the system further includes an open-type needle roller bearing and an outer rotor sleeve. The outer ring of the open-type needle roller bearing is connected to the oil pump housing, and the inner ring of the open-type needle roller bearing is connected to the outer rotor sleeve. The outer rotor sleeve has an eccentric receiving cavity, and the cycloidal rotor is rotatably connected within the eccentric receiving cavity. In the above technical solution, the open-type needle roller bearing provides high-precision positioning, reduces the radial runout of the rotor, and reduces the vibration and noise of the pump at high speeds, making it suitable for precision equipment. The eccentric receiving cavity of the outer rotor sleeve compensates for the meshing eccentricity of the rotor, achieving coaxial installation of the cycloidal rotor and the oil pump housing, eliminating wear hotspots caused by eccentricity, and extending the service life of the pump body.

[0007] Preferably, the distance between the center of the cross-section of the outer rotor sleeve and the center of the cross-section of the eccentric accommodating cavity is equal to the meshing eccentricity distance of the outer cycloidal rotor and the inner cycloidal rotor. In the above technical solution, precise eccentricity matching ensures force balance during rotor meshing and reduces unbalanced torque. The coaxial design ensures uniform wear distribution, avoids local overheating, and extends the service life of the pump body. Standardized eccentricity simplifies the assembly process, reduces production errors, and is suitable for mass production.

[0008] Preferably, the inner wall of the eccentric accommodating cavity has at least one oil storage hole. In the above technical solution, the oil storage hole continuously supplies lubricating oil during rotation, forming a uniform oil film between the outer rotor sleeve and the outer cycloidal rotor, thereby reducing the coefficient of friction between them. The oil film, as a heat-conducting medium, accelerates heat dissipation, reducing the temperature rise of the pump during continuous operation, making it particularly suitable for high-temperature environments. The self-lubricating design reduces the frequency of external lubrication, extending the maintenance cycle.

[0009] Preferably, the system further includes a lip seal ring, wherein the first flow channel has a first flow channel opening, and the lip seal ring provides a sealing connection between the first flow channel opening and the oil pipe. In the above technical solution, the lip seal ring and the flow channel opening are interference-fitted, ensuring sealing performance under high pressure and improving system reliability.

[0010] Preferably, the system further includes an oil pump gasket, which is disposed between the oil pump housing and the outer cycloidal rotor and the inner cycloidal rotor. In the above technical solution, the oil pump gasket is made of wear-resistant stainless steel, protecting the oil pump housing from rotor wear and extending its service life. As a replaceable component, the gasket reduces the replacement frequency of the overall oil pump housing, lowering lifespan costs.

[0011] Preferably, it further includes a drive shaft stator, which is connected to the oil pump housing. The drive shaft stator and the oil pump housing together form a receiving cavity. The outer cycloidal rotor and the inner cycloidal rotor are disposed in the receiving cavity. The drive shaft stator is also provided with a hole for the connecting shaft to pass through the receiving cavity.

[0012] Preferably, the pump also includes an oil pipe plug, wherein the pump housing has a first maintenance channel, one end of which is connected to the first flow channel, and the other end of which is provided with the oil pipe plug. In the above technical solution, the design of the first maintenance channel and the oil pipe plug allows for quick disassembly and cleaning of the flow channel, shortening maintenance time. The first maintenance channel facilitates the removal of impurities from the oil, reducing the risk of pump blockage. The oil pipe plug provides a pressure relief point, reducing safety hazards during maintenance.

[0013] Preferably, the system further includes an oil pump housing plug, wherein the oil pump housing has a second maintenance channel, one end of which is connected to the second flow channel, and the other end of which is provided with the oil pump housing plug. In the above technical solution, the design of the second maintenance channel and the oil pump housing plug allows for quick disassembly and cleaning of the flow channel, shortening maintenance time. The second maintenance channel facilitates the removal of impurities from the oil, reducing the risk of pump blockage. The oil pump housing plug provides a pressure relief point, reducing safety hazards during maintenance.

[0014] Secondly, the present invention also provides a method of using a bidirectional internal meshing cycloidal rotor pump with a central pump oil, comprising the following steps: The input end of the gearbox drives the connecting shaft to rotate counterclockwise, which in turn drives the outer cycloidal rotor and the inner cycloidal rotor to rotate counterclockwise. The lubricating oil is drawn into the oil chamber from the gearbox through the oil pipe and the first flow channel. After rotation, the lubricating oil moves to another oil chamber and enters the center through hole of the connecting shaft through the second flow channel and is output to the gearbox, realizing oil circulation cooling. Alternatively, the input end of the gearbox drives the connecting shaft to rotate clockwise, which in turn drives the outer cycloidal rotor and the inner cycloidal rotor to rotate clockwise. The lubricating oil is drawn into the oil chamber from the gearbox through the central through hole and the second flow channel. After rotation, the lubricating oil moves to another oil chamber and enters the oil pipe through the first flow channel. It is then output from the oil pipe back into the gearbox, achieving oil circulation cooling.

[0015] (III) Beneficial Effects The above-described technical solution of the present invention has at least the following advantages: This invention enables bidirectional rotation of both the inner and outer cycloidal rotors; and oil can be pumped through the central through-hole at the shaft center of the inner cycloidal rotor, achieving oil circulation and cooling during both rotations, thus broadening the application scenarios of the oil pump. The inner cycloidal rotor is coaxially mounted with the oil pump housing, reducing wear between the rotor and stator and extending the service life of the oil pump. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a front view of the bidirectional internal meshing cycloidal rotor pump with a central pump oil provided in an embodiment of the present invention.

[0018] Figure 2 This is a cross-sectional view of the bidirectional internal meshing cycloidal rotor pump with a central pump oil according to an embodiment of the present invention.

[0019] The labels for the attached figures are as follows: 1. Oil pump housing; 2. Oil pipe; 3. Heterocycloidal rotor; 4. Inner cycloidal rotor; 5. Open needle roller bearing; 6. Outer rotor sleeve; 7. Lip seal; 8. Oil pump pad; 9. Drive shaft stator; 11. First flow channel; 12. Second flow channel; 13. First maintenance passage; 14. Second maintenance passage; 31. First gear tooth; 41. Second gear tooth; 42. Connecting shaft; 61. Eccentric cavity; 81. Locating pin; 91. Hole; 101. Oil pipe plug; 102. Oil pump housing plug; 111. First flow channel opening; 421. Central through hole; 422. Spline; 611. Oil reservoir hole. Detailed Implementation

[0020] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0021] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be located directly on or indirectly on the other component. When a component is referred to as "connected to" another component, it can be directly or indirectly connected to the other component.

[0022] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate that the device or element must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating relative importance or the number of technical features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified. The specific implementation of this invention will be described in more detail below with reference to specific embodiments: like Figure 1 and Figure 2As shown, this embodiment of the invention provides a bidirectional internal meshing cycloidal rotor pump with a central pump oil, including an oil pump housing 1, an oil pipe 2, an outer cycloidal rotor 3, and an inner cycloidal rotor 4; the oil pump housing 1 has a first flow channel 11 and a second flow channel 12; one end of the oil pipe 2 is connected to the first flow channel 11, and the other end of the oil pipe 2 is connected to the lubricating oil storage chamber of the gearbox; the outer cycloidal rotor 3 is rotatably connected to the oil pump housing 1, and the outer cycloidal rotor has N first gear teeth 31; the inner cycloidal rotor 4 is rotatably connected to the oil pump housing 1, and the rotation center of the outer cycloidal rotor 3 is eccentrically set with respect to the rotation center of the inner cycloidal rotor 4, and the inner cycloidal rotor 4 has N first gear teeth 31. - One second gear tooth 41. The inner cycloidal rotor 4 has a connecting shaft 42 connected to the input end of the gearbox. The connecting shaft 42 has a central through hole 421. One end of the central through hole 421 is connected to the lubricating oil storage cavity of the gearbox, and the other end of the central through hole 421 is connected to the second flow channel 12. The inner cycloidal rotor 4 and the outer cycloidal rotor 3 are meshed and connected with a line seal to form multiple radially isolated oil cavities (oil cavity a, oil cavity b, and oil cavity c). The end of the first flow channel 11 away from the oil pipe 2 is connected to one of the oil cavities, and the end of the second flow channel 12 away from the central through hole 421 is connected to another oil cavity. The connecting shaft 42 includes a spline 422, which is connected to the transmission input end of the gearbox. The input end drives the inner cycloidal rotor 4 to rotate through the spline 422, thereby driving the outer cycloidal rotor 3 to rotate. The inner cycloidal rotor 4 and the outer cycloidal rotor 3 are immersed in lubricating oil. When rotating, the oil pump port is the central through hole 421 of the inner cycloidal rotor 4.

[0024] In one embodiment, the system further includes an open needle roller bearing 5 and an outer rotor sleeve 6. The outer ring of the open needle roller bearing 5 is connected to the oil pump housing 1, and the inner ring of the open needle roller bearing 5 is connected to the outer rotor sleeve 6. The outer rotor sleeve 6 has an eccentric receiving cavity 61, and the cycloidal rotor 3 is rotatably connected to the eccentric receiving cavity 61.

[0025] In one embodiment, the distance between the center of the cross section of the outer rotor sleeve 6 and the center of the cross section of the eccentric accommodating cavity 61 is equal to the meshing eccentric distance between the outer cycloidal rotor 3 and the inner cycloidal rotor 4, thereby achieving eccentric compensation, so that the axis of the inner cycloidal rotor 4 of the oil pump coincides with the axis of the mounting hole of the oil pump housing 1, thereby enabling coaxial bidirectional rotation.

[0026] In one embodiment, the inner wall of the eccentric accommodating cavity 61 has at least one oil storage hole 611. In this embodiment, the outer rotor sleeve 6 and the outer cycloidal rotor 3 preferably include two oil storage holes 611. During the rotation of the outer cycloidal rotor 3, the lubricating oil in the two oil storage holes 611 is carried into the gap between the outer rotor sleeve 6 and the outer cycloidal rotor 3, forming a lubricating oil film between the outer rotor sleeve 6 and the outer cycloidal rotor 3, thereby reducing wear.

[0027] In one embodiment, a lip seal 7 is also included. The first flow channel 11 has a first flow channel opening 111, and the lip seal 7 seals the first flow channel opening 111 to the oil pipe 2. Specifically, the lip seal 7 is interference-sealed with the oil pump housing 1 and the oil pipe 2, and the other end of the oil pipe 2 is connected to the lubricating oil in the gearbox. This enables oil circulation between the lower part of the oil pump housing 1 and the oil in the gearbox.

[0028] In one embodiment, an oil pump pad 8 is also included, which is disposed between the oil pump housing 1 and the outer cycloidal rotor 3 and the inner cycloidal rotor 4.

[0029] In one embodiment, a drive shaft stator 9 is also included. The drive shaft stator 9 is connected to the oil pump housing 1, and the drive shaft stator 9 and the oil pump housing 1 together form a receiving cavity. The outer cycloidal rotor 3 and the inner cycloidal rotor 4 are disposed in the receiving cavity. The drive shaft stator 9 also has a hole 91 for the connecting shaft 42 to pass through the receiving cavity. The oil pump housing 1 is in contact with the drive shaft stator 9, and the drive shaft stator 9 forms an oil cavity d between the inner cycloidal rotor 4 and the hole 91. Specifically, a locating pin 81 is interference-fitted onto the oil pump housing 1, and an oil pump pad 8 and an open needle roller bearing 5 are positioned and mounted on the inner cavity of the oil pump housing 1 by the locating pin 81. The oil pump pad 8 is made of wear-resistant stainless steel, which improves wear resistance and protects the oil pump housing 1. The outer ring of the open needle roller bearing 5 is interference-fitted with the oil pump housing 1, and the inner ring needle rollers of the open needle roller bearing 5 are positioned and mounted with the outer rotor sleeve 6. The open needle roller bearing 5 serves to position the outer rotor sleeve 6 axially. The outer cycloidal rotor 3 and the inner cycloidal rotor 4 are meshed and assembled, with line contact between them. The entire lubricating oil pump is in contact with the drive shaft stator 9. The drive shaft stator 9 seals the oil chambers on one side of the pump end face, thus forming line-sealed oil chambers a, b, and c. The outer cycloidal rotor 3 and the inner cycloidal rotor 4 are immersed in lubricating oil, and the pump port is the central through hole 421 of the inner cycloidal rotor 4 when rotating.

[0030] In one embodiment, the system further includes an oil pipe plug 101. The oil pump housing 1 has a first maintenance channel, one end of which is connected to the first flow channel 11, and the other end of which is provided with the oil pipe plug 101. Specifically, the oil pipe plug 101 is threadedly connected to the oil pump housing 1, and the oil pump can be repaired by using a wrench to remove the oil pipe plug 101.

[0031] In one embodiment, the system further includes an oil pump housing plug 102. The oil pump housing 1 has a second maintenance channel 13, one end of which is connected to the second flow channel 12, and the other end of which is provided with the oil pump housing plug 102. Specifically, the oil pump housing plug 102 is threadedly connected to the oil pump housing 1, and the oil pump housing plug 102 can be removed using a wrench for oil pump maintenance.

[0032] In this embodiment, the aforementioned bidirectional internal meshing cycloidal rotor pump with a central pump achieves bidirectional rotation by using the centering effect of the open needle roller bearing 5 and the eccentric compensation of the outer rotor sleeve 6 to ensure that the inner cycloidal rotor 4 is coaxially mounted with the pump housing 1. By rationally arranging the lubricating oil flow path, the inner cycloidal rotor 4 achieves central pumping of oil, and oil circulation cooling can be achieved during bidirectional rotation, broadening the application scenarios of the oil pump. The oil storage holes 611 arranged on the outer rotor sleeve 6 reduce wear between the rotor (outer cycloidal rotor 3) and the stator (outer rotor sleeve 6), extending the service life of the oil pump. The entire oil pump is small in size, lightweight, has a high rotational speed, and good ease of use.

[0033] This invention also provides a method for using a bidirectional internal meshing cycloidal rotor pump with a central pump oil, comprising the following steps: The input end of the gearbox drives the connecting shaft 42 to rotate counterclockwise, which in turn drives the outer cycloidal rotor 3 and the inner cycloidal rotor 4 to rotate counterclockwise. The lubricating oil is drawn from the gearbox into the oil chamber through the oil pipe 2 and the first flow channel 11. After rotation, the lubricating oil moves to another oil chamber and enters the center through hole of the connecting shaft 42 through the second flow channel 12 and is output to the gearbox, realizing oil circulation cooling. Alternatively, the input end of the gearbox drives the connecting shaft 42 to rotate clockwise, thereby driving the outer cycloidal rotor 3 and the inner cycloidal rotor 4 to rotate clockwise. The lubricating oil is drawn into the oil chamber from the gearbox through the central through hole 421 and the second flow channel 12. After rotation, the lubricating oil moves to another oil chamber and enters the oil pipe 2 through the first flow channel 11, and is output from the oil pipe 2 to the gearbox, realizing oil circulation cooling.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A bidirectional internal meshing cycloidal rotor pump with a central pump oil, characterized in that, include: The oil pump housing has a first flow channel and a second flow channel; An oil pipe, one end of which is connected to the first flow channel, and the other end of which is connected to the lubricating oil storage chamber of the gearbox; An epicycloid rotor is rotatably connected to the oil pump housing, and the epicycloid rotor has N first gear teeth; An inner cycloidal rotor is rotatably connected to the oil pump housing. The rotation center of the outer cycloidal rotor is eccentrically set with respect to the rotation center of the inner cycloidal rotor. The inner cycloidal rotor has N-1 second gear teeth and a connecting shaft connected to the input end of the gearbox. The connecting shaft has a central through hole. One end of the central through hole is connected to the lubricating oil storage cavity of the gearbox, and the other end of the central through hole is connected to the second flow channel. The inner cycloidal rotor and the outer cycloidal rotor are meshed and connected with a line seal to form multiple radially isolated oil cavities. The end of the first flow channel away from the oil pipe is connected to one of the oil cavities, and the end of the second flow channel away from the central through hole is connected to another oil cavity.

2. The bidirectional internal meshing cycloidal rotor pump with a central pump oil as described in claim 1, characterized in that, It also includes an open needle roller bearing and an outer rotor sleeve. The outer ring of the open needle roller bearing is connected to the oil pump housing, and the inner ring of the open needle roller bearing is connected to the outer rotor sleeve. The outer rotor sleeve has an eccentric receiving cavity, and the cycloidal rotor is rotatably connected to the eccentric receiving cavity.

3. The bidirectional internal meshing cycloidal rotor pump with a central pump oil as described in claim 2, characterized in that, The distance between the center of the cross section of the outer rotor sleeve and the center of the cross section of the eccentric accommodating cavity is equal to the meshing eccentric distance between the outer cycloidal rotor and the inner cycloidal rotor.

4. The bidirectional internal meshing cycloidal rotor pump with a central pump oil as described in claim 2, characterized in that, The inner wall of the eccentric cavity has at least one oil storage hole.

5. The bidirectional internal meshing cycloidal rotor pump with a central pump oil as described in claim 1, characterized in that, It also includes a lip seal ring, wherein the first flow channel has a first flow channel opening, and the lip seal ring seals and connects the first flow channel opening to the oil pipe.

6. The bidirectional internal meshing cycloidal rotor pump with a central pump oil as described in claim 1, characterized in that, It also includes an oil pump gasket, which is disposed between the oil pump housing and the outer cycloidal rotor and the inner cycloidal rotor.

7. The bidirectional internal meshing cycloidal rotor pump with a central pump oil as described in claim 1, characterized in that, It also includes a drive shaft stator, which is connected to the oil pump housing. The drive shaft stator and the oil pump housing together form a receiving cavity. The outer cycloidal rotor and the inner cycloidal rotor are disposed in the receiving cavity. The drive shaft stator is also provided with a hole for the connecting shaft to pass through the receiving cavity.

8. The bidirectional internal meshing cycloidal rotor pump with a central pump oil as described in claim 1, characterized in that, It also includes an oil pipe plug, and the oil pump housing has a first maintenance channel, one end of which is connected to the first flow channel, and the other end of which is provided with the oil pipe plug.

9. The bidirectional internal meshing cycloidal rotor pump with a central pump oil as described in claim 1, characterized in that, It also includes an oil pump housing plug, wherein the oil pump housing has a second maintenance channel, one end of the second maintenance channel is connected to the second flow channel, and the other end of the second maintenance channel is provided with the oil pump housing plug.

10. A method of using a bidirectional internal meshing cycloidal rotor pump with a central pump oil as described in any one of claims 1-9, characterized in that, Includes the following steps: The input end of the gearbox drives the connecting shaft to rotate counterclockwise, which in turn drives the outer cycloidal rotor and the inner cycloidal rotor to rotate counterclockwise. The lubricating oil is drawn into the oil chamber from the gearbox through the oil pipe and the first flow channel. After rotation, the lubricating oil moves to another oil chamber and enters the center through hole of the connecting shaft through the second flow channel and is output to the gearbox, realizing oil circulation cooling. Alternatively, the input end of the gearbox drives the connecting shaft to rotate clockwise, which in turn drives the outer cycloidal rotor and the inner cycloidal rotor to rotate clockwise. The lubricating oil is drawn into the oil chamber from the gearbox through the central through hole and the second flow channel. After rotation, the lubricating oil moves to another oil chamber and enters the oil pipe through the first flow channel. It is then output from the oil pipe back into the gearbox, achieving oil circulation cooling.

Images