A driving motor with a cooling oil channel adaptive switching function

Abstract

The application relates to a driving motor with a cooling oil channel self-adaptive switching function, and belongs to the technical field of liquid-cooled motors.The driving motor comprises an outer static cylinder, an inner dynamic cylinder, a cooling pipe group and a driving piece, all of which are located in a shell.The outer static cylinder is located on one side of a ring-shaped stator and is gap-sleeved on the outside of a rotating shaft.The inner dynamic cylinder is rolled in the outer static cylinder and is slidingly sleeved on the outside of the rotating shaft.The cooling pipe group is provided with an oil inlet hole and a plurality of oil injection holes.The fixed end of the driving piece is fixed on the rotating shaft and is provided with a driving end which reciprocally moves along the axis direction of the rotating shaft.The inner dynamic cylinder is fixed on the driving end of the driving piece.The cooling oil in the outside is introduced into the space between the inner dynamic cylinder and the outer static cylinder by using the communicated oil injection hole, the oil passage and the oil outlet hole, and then the oil control hole on the outer static cylinder and the plurality of oil distribution holes on the inner dynamic cylinder are switchingly communicated, so that the oil distribution holes and the oil control hole are arranged in a staggered mode while the inner dynamic cylinder is moved by the driving piece, the flow speed of the cooling oil in the cooling pipe group is regulated, the liquid cooling heat dissipation efficiency in the motor is changed.

Description

Technical Field

[0001] This invention relates to the field of liquid-cooled motor technology, and in particular to a drive motor with adaptive switching function of cooling oil channels. Background Technology

[0002] Against the backdrop of continuous advancements in green and low-carbon development, electric vehicles have gradually become an important direction for the automotive industry. With the continuous evolution of electric drive technology, motor drive systems are developing towards higher power density, higher integration, and higher efficiency, placing more stringent demands on their thermal management performance. Especially during vehicle operation, the drive motor frequently experiences various complex conditions such as acceleration, hill climbing, steering, and prolonged high-load operation. Its internal heat generation exhibits rapid changes and periodic fluctuations. If the cooling capacity does not match the actual operating conditions, it can easily lead to decreased motor efficiency, reduced reliability, and even affect the safe operation of the entire vehicle.

[0003] To adapt to the aforementioned changes in operating conditions, some existing motor cooling systems attempt to actively adjust the cooling oil flow by introducing various sensors, actuators, and hydraulic control components such as proportional valves and hydraulic valves to achieve dynamic matching of cooling capacity. However, such solutions typically rely on complex sensing and control units, resulting in a cumbersome system structure, complex control logic, and high manufacturing and maintenance costs. Furthermore, in application scenarios with limited installation space and harsh operating environments, the long-term reliability and stability of related components are difficult to guarantee effectively, hindering their engineering application and widespread adoption.

[0004] Therefore, how to design a device that automatically adjusts the cooling oil flow rate according to the motor's operating state without relying on complex sensors or precision control systems, so as to achieve adaptive matching between cooling capacity and heat dissipation demand, thereby improving heat dissipation efficiency, reducing additional energy consumption, and enhancing the stability and durability of the motor under various operating conditions, has become an urgent technical problem to be solved. Summary of the Invention

[0005] This invention provides a drive motor with adaptive switching function of cooling oil passages, which solves the technical problem of existing liquid-cooled motors relying on complex sensors or precision control systems to adjust the liquid cooling efficiency.

[0006] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: a drive motor with adaptive switching function of cooling oil passage, comprising: a housing and a rotating shaft located within the housing, an annular stator wound with coils, and a magnetic annular rotor, wherein the two ends of the rotating shaft are respectively fixed to the two ends of the housing; the annular stator is rotatably sleeved outside the rotating shaft via bearings; the annular rotor is gap-sleeved outside the annular stator and its outer sidewall is fixed to the inner sidewall of the housing; further comprising: an outer stationary cylinder, an inner moving cylinder, a cooling pipe assembly, and a drive component, all located within the housing; one end of the housing is provided with an oil injection hole and an oil drain hole; one end of the rotating shaft is provided with an oil passage groove communicating with the oil injection hole and its sidewall is provided with an oil outlet hole communicating with the oil passage groove; the outer stationary cylinder is located on one side of the annular stator. The gap is fitted outside the rotating shaft; the inner moving cylinder rotates seamlessly inside the outer stationary cylinder and slides outside the rotating shaft, and its cylinder wall is provided with multiple oil distribution holes that can communicate with the oil outlet hole respectively; the cylinder wall of the outer stationary cylinder is provided with oil control holes that can switch to communicate with multiple oil distribution holes; the cooling pipe assembly is located on one side of the annular stator and is provided with an oil inlet hole that communicates with the oil control hole and multiple oil spray holes that are all arranged towards the annular stator; the fixed end of the driving member is fixed on the rotating shaft and has a driving end that reciprocates along the axis of the rotating shaft; the inner moving cylinder is fixed to the driving end of the driving member so as to move synchronously with the driving end of the driving member, and the corresponding oil distribution holes and oil control holes are staggered to realize the regulation of the cooling oil flow rate in the cooling pipe assembly.

[0007] The beneficial effects of this invention are: a novel heat dissipation structure for a liquid-cooled motor is designed. First, external cooling oil is introduced between the inner moving cylinder and the outer stationary cylinder using interconnected oil filling holes, oil channels, and oil outlet holes. Then, the oil control holes on the outer stationary cylinder and multiple oil distribution holes on the inner moving cylinder can be switched and connected. This allows for the staggered arrangement of oil distribution holes and oil control holes while the driving component changes the position of the inner moving cylinder, thereby regulating the flow speed of cooling oil in the cooling pipe assembly and changing the liquid cooling efficiency of the motor.

[0008] Based on the above technical solution, the present invention can be further improved as follows.

[0009] Furthermore, the housing includes a shell and an end cap, with an opening on one side of the shell; the end cap is fixed to the opening of the shell; the two ends of the rotating shaft are respectively fixed to the opposite ends of the shell and the end cap; the oil injection hole and the oil drain hole are both located on the end cap.

[0010] Furthermore, the annular rotor includes a rotating ring and a permanent magnet ring both located within the housing, with the permanent magnet ring being spaced outside the annular stator; the inner ring of the rotating ring is fixed outside the permanent magnet ring, and its outer ring is fixed through the inner wall of the housing.

[0011] Furthermore, the driving component includes a conical sleeve, a connecting rod, and a hammer ball. The conical sleeve is the fixed end of the driving component and is located on one side of the inner moving cylinder. The conical sleeve is fixed to the rotating shaft and its outer wall is provided with a spiral groove arranged along the axial direction. The large end of the conical sleeve is arranged towards the annular stator. One end of the connecting rod is hinged to the inner moving cylinder. The hammer ball is the driving end of the driving component and is fixed to the other end of the connecting rod and slides in the spiral groove to drive the inner moving cylinder to change position according to the rotational speed of the rotating shaft.

[0012] The further beneficial effect of the above is that: first, the cone sleeve is fixed to the outside of the rotating shaft, and then one end of the connecting rod is hinged to the inner moving cylinder. Since the hammer ball slides in the spiral groove of the cone sleeve and is hinged to the other end of the connecting rod, the position of the inner moving cylinder can be moved in conjunction with the rotational speed of the rotating shaft, so that the oil control hole of the outer stationary cylinder and the multiple oil distribution holes of the inner moving cylinder are staggered, thereby achieving precise control of the flow speed of cooling oil in the cooling pipe group.

[0013] Furthermore, the spiral groove, the connecting rod, and the hammer ball are all arranged in pairs symmetrically.

[0014] Furthermore, the cooling pipe assembly includes a main cooling pipe, a spring, a weight, a first cooling branch pipe, and a second cooling branch pipe, all located within the housing. One end of the main cooling pipe is connected to the oil control hole, and the other end is a closed end. The main cooling pipe has a first oil hole and a second oil hole on its wall near its closed end. The spring is located inside the main cooling pipe, and one end is fixed to the inner closed end of the main cooling pipe. The weight slides in a sealed manner within the main cooling pipe and contacts the spring, so as to close the second oil hole in the spring's natural state or open the second oil hole in the spring's compressed state. The first cooling branch pipe has an annular structure, and its wall has a first oil inlet hole and multiple first oil spray holes connected to the first oil hole. The multiple first oil spray holes are arranged opposite to the end of the annular stator. The second cooling branch pipe has an annular structure, and its wall has a second oil inlet hole connected to the second oil hole and multiple second oil spray holes. The multiple second oil spray holes are respectively arranged opposite to multiple stator slots of the annular stator. The multiple oil spray holes are multiple first oil spray holes and multiple second oil spray holes.

[0015] The further beneficial effects of adopting the above are as follows: the cooling pipe group is divided into a main cooling pipe, a first cooling pipe, and a second cooling pipe. Since the main cooling pipe has a spring and a weight inside the corresponding closed end, the second oil hole can be closed when the spring is in its natural state (the oil control hole and the oil distribution hole are arranged opposite each other), so that the cooling oil only enters the first cooling pipe and is sprayed only on the annular stator end face (the cooling oil is sprayed on the annular stator end face, and the heat dissipation efficiency is low); or the second oil hole can be opened when the spring is compressed (the oil control hole and the oil distribution hole are arranged in a staggered manner), so that a small amount of cooling oil enters the first cooling pipe and a large amount of cooling oil enters the second cooling pipe and is sprayed into the annular stator stator slot (the cooling oil is sprayed into the annular stator stator slot, and since the coil is wound in the annular stator stator slot, the heat dissipation efficiency is high).

[0016] Furthermore, it also includes two limiting blocks located inside the housing. The two limiting blocks are fixed on the rotating shaft on both sides of the inner moving cylinder to limit the sliding position of the inner moving cylinder.

[0017] The further beneficial effect of adopting the above is that by using two limit blocks to restrict the sliding position of the inner moving cylinder on both sides, the inner moving cylinder can be prevented from detaching from the outer stationary cylinder, thus improving the operational safety of the liquid-cooled motor's liquid cooling heat dissipation. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of a drive motor with adaptive switching function for cooling oil passages according to the present invention.

[0019] Figure 2 This is a schematic diagram of the internal structure of a drive motor with adaptive switching function for cooling oil passages according to the present invention.

[0020] Figure 3 This is a schematic diagram of the disassembled structure of a drive motor with adaptive switching function of cooling oil passage according to the present invention.

[0021] Figure 4 This is a schematic diagram of the structure of the inner moving cylinder, outer stationary cylinder, driving component, and cooling pipe assembly in a drive motor with adaptive switching function of cooling oil passage according to the present invention.

[0022] Figure 5 This is a schematic diagram of the structure of the inner moving cylinder, outer stationary cylinder, and cooling pipe assembly in a drive motor with adaptive switching function of cooling oil passage according to the present invention.

[0023] Figure 6 This is a schematic diagram of the internal moving cylinder and driving component in a drive motor with adaptive switching function for cooling oil passages according to the present invention;

[0024] Figure 7 This is a schematic diagram of the cooling main pipe, spring, and weight in a drive motor with adaptive switching function of cooling oil passage according to the present invention.

[0025] The attached diagram lists the components represented by each number as follows:

[0026] 1. Housing; 11. Shell; 12. End cover; 121. Oil inlet hole; 122. Oil outlet hole; 2. Shaft; 21. Oil passage groove; 22. Oil outlet hole; 3. Annular stator; 4. Annular rotor; 41. Rotating ring; 42. Permanent magnet ring; 5. Outer stationary cylinder; 51. Oil control hole; 6. Inner moving cylinder; 61. Oil distribution hole; 7. Cooling pipe assembly; 71. Refrigeration main pipe; 711. First oil hole; 712. Second oil hole; 72. Spring; 73. Weight; 74. First refrigeration branch pipe; 75. Second refrigeration branch pipe; 8. Drive component; 81. Tapered sleeve; 811. Spiral groove; 82. Connecting rod; 83. Hammer ball; 9. Limiting block. Detailed Implementation

[0027] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0028] like Figure 1 and Figure 2 As shown, a drive motor with adaptive switching function for cooling oil channels includes: a housing 1 and a rotating shaft 2 located inside the housing 1, an annular stator 3 with coils wound around it, and an annular rotor 4 with magnetism. The two ends of the rotating shaft 2 are respectively fixed to the two ends of the housing 1. The annular stator 3 is rotatably sleeved on the outside of the rotating shaft 2 through bearings. The annular rotor 4 is loosely sleeved on the outside of the annular stator 3, and its outer side wall is fixed to the inner side wall of the housing 1. It also includes: an outer stationary cylinder 5, an inner moving cylinder 6, a cooling pipe assembly 7, and a drive component 8, all located inside the housing 1. One end of the housing 1 is provided with an oil injection hole 121 and an oil drain hole 122. One end of the rotating shaft 2 is provided with an oil passage groove 21 communicating with the oil injection hole 121, and its side wall is provided with an oil outlet hole 22 communicating with the oil passage groove 21. The outer stationary cylinder 5 is located on one side of the annular stator 3. The gap is sleeved outside the rotating shaft 2; the inner moving cylinder 6 rotates seamlessly inside the outer stationary cylinder 5 and slides outside the rotating shaft 2, and its cylinder wall is provided with multiple oil distribution holes 61 that can be connected to the oil outlet hole 22 respectively; the outer stationary cylinder 5 is provided with oil control holes 51 that can be switched to connect with multiple oil distribution holes 61; the cooling pipe assembly 7 is located on one side of the annular stator 3 and is provided with an oil inlet hole connected to the oil control hole 51 and multiple oil spray holes that are all arranged towards the annular stator 3; the fixed end of the driving component 8 is fixed on the rotating shaft 2 and has a driving end that reciprocates along the axis of the rotating shaft 2; the inner moving cylinder 6 is fixed on the driving end of the driving component 8 so as to move synchronously with the driving end of the driving component 8, and the corresponding oil distribution holes 61 and oil control holes 51 are staggered to realize the regulation of the cooling oil flow speed in the cooling pipe assembly 7.

[0029] like Figure 1 and Figure 2As shown, in some specific embodiments, the housing 1 may include a housing 11 and an end cover 12. The housing 11 has an opening on one side; the end cover 12 is fixed at the opening of the housing 11; the two ends of the rotating shaft 2 are respectively fixed at the opposite ends of the housing 11 and the end cover 12; the oil injection hole 121 and the oil drain hole 122 are both provided on the end cover 12.

[0030] like Figure 3 As shown, in some specific embodiments, the annular rotor 4 may include a rotating ring 41 and a permanent magnet ring 42 both located inside the housing 1. The permanent magnet ring 42 is gapped around the annular stator 3. The inner ring of the rotating ring 41 is fixed around the permanent magnet ring 42 and its outer ring is fixed through the inner wall of the housing 1.

[0031] like Figure 3 , Figure 6 and Figure 7 As shown, in some specific embodiments, the driving component 8 may include a conical sleeve 81, a connecting rod 82, and a hammer ball 83. The conical sleeve 81 is the fixed end of the driving component 8 and is located on one side of the inner moving cylinder 6. The conical sleeve 81 is fixed on the rotating shaft 2 and its outer wall is provided with a spiral groove 811 arranged along the axial direction. The large end of the conical sleeve 81 is arranged towards the annular stator 3. One end of the connecting rod 82 is hinged to the inner moving cylinder 6. The hammer ball 83 is the driving end of the driving component 8 and is fixed to the other end of the connecting rod 82 and slides in the spiral groove 811 so as to drive the inner moving cylinder 6 to change position according to the rotation speed of the rotating shaft 2.

[0032] Specifically, the spiral groove 811, the connecting rod 82, and the hammer ball 83 can all be two symmetrically arranged components.

[0033] like Figure 3 , Figure 4 and Figure 5 As shown, in some specific embodiments, the cooling pipe assembly 7 includes a main cooling pipe 71, a spring 72, a weight 73, a first cooling branch pipe 74, and a second cooling branch pipe 75, all located within the housing 1. One end of the main cooling pipe 71 is connected to the oil control hole 51, and the other end is a closed end. The main cooling pipe 71 has a first oil hole 711 and a second oil hole 712 on its pipe wall near its closed end. The spring 72 is located inside the main cooling pipe 71, and one end of it is fixed to the inner closed end of the main cooling pipe 71. The weight 73 slides in a sealed manner inside the main cooling pipe 71 and contacts the spring 72, so that when the spring 72 is in its natural state... The second oil hole 712 is closed in the closed state or opened in the compressed state of the spring 72; the first refrigeration branch pipe 74 is annular and its pipe wall is provided with a first oil inlet hole communicating with the first oil hole 711 and a plurality of first oil injection holes, and the plurality of first oil injection holes are arranged opposite to the end of the annular stator 3; the second refrigeration branch pipe 75 is annular and its pipe wall is provided with a second oil inlet hole communicating with the second oil hole 712 and a plurality of second oil injection holes, and the plurality of second oil injection holes are respectively arranged opposite to the plurality of stator slots of the annular stator 3; the plurality of oil injection holes are a plurality of first oil injection holes and a plurality of second oil injection holes.

[0034] like Figure 3 As shown, in some specific embodiments, it may also include two limiting blocks 9, both located inside the housing 1. The two limiting blocks 9 are fixed on the rotating shaft 2 on both sides of the inner moving cylinder 6 to limit the sliding position of the inner moving cylinder 6.

[0035] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A drive motor with adaptive switching function for cooling oil passages, comprising: The housing (1) includes a rotating shaft (2) located within the housing (1), an annular stator (3) wound with coils, and a magnetic annular rotor (4). The two ends of the rotating shaft (2) are respectively fixed to the two ends of the housing (1). The annular stator (3) is rotatably sleeved outside the rotating shaft (2) via bearings. The annular rotor (4) is spaced outside the annular stator (3), and its outer sidewall is fixed to the inner sidewall of the housing (1). The housing (1) also includes an outer stationary cylinder (5), an inner moving cylinder (6), a cooling pipe assembly (7), and a driving component (8), all located within the housing (1). The housing (1) has an oil injection hole (121) and an oil drain hole (122) at one end; the rotating shaft (2) has an oil passage groove (21) communicating with the oil injection hole (121) at one end and an oil outlet hole (22) communicating with the oil passage groove (21) on its side wall; the outer stationary cylinder (5) is located on one side of the annular stator (3) and is fitted with a gap outside the rotating shaft (2); the inner moving cylinder (6) rotates inside the outer stationary cylinder (5) and is slidably fitted outside the rotating shaft (2), and its cylinder wall has a plurality of oil distribution holes (61) that can communicate with the oil outlet hole (22) respectively. The outer stationary cylinder (5) has an oil control hole (51) on its wall that can be switched to communicate with multiple oil distribution holes (61); the cooling pipe assembly (7) is located on one side of the annular stator (3) and has an oil inlet hole communicating with the oil control hole (51) and multiple oil spray holes arranged towards the annular stator (3); the fixed end of the driving member (8) is fixed on the rotating shaft (2) and has a driving end that reciprocates along the axis of the rotating shaft (2); the inner moving cylinder (6) is fixed to the driving end of the driving member (8) so as to move synchronously with the driving end of the driving member (8), and the corresponding oil distribution hole (61) and oil control hole (51) are staggered to realize the regulation of the cooling oil flow rate in the cooling pipe assembly (7); The driving component (8) includes a cone sleeve (81), a connecting rod (82), and a hammer ball (83). The cone sleeve (81) is the fixed end of the driving component (8) and is located on one side of the inner moving cylinder (6). The cone sleeve (81) is sleeved on the rotating shaft (2) and its outer wall is provided with a spiral groove (811) arranged along the axial direction. The large end of the cone sleeve (81) is arranged towards the annular stator (3). One end of the connecting rod (82) is hinged to the inner moving cylinder (6). The hammer ball (83) is the driving end of the driving component (8) and is fixed to the other end of the connecting rod (82) and slides in the spiral groove (811) so as to drive the inner moving cylinder (6) to change position according to the rotation speed of the rotating shaft (2).

2. A drive motor with adaptive switching function for cooling oil passages according to claim 1, characterized in that, The housing (1) includes a housing (11) and an end cap (12). The housing (11) has an opening on one side. The end cap (12) is fixed at the opening of the housing (11). The two ends of the rotating shaft (2) are respectively fixed at the opposite ends of the housing (11) and the end cap (12). The oil injection hole (121) and the oil drain hole (122) are both located on the end cap (12).

3. A drive motor with adaptive switching function for cooling oil passages according to claim 1, characterized in that, The annular rotor (4) includes a rotating ring (41) and a permanent magnet ring (42) both located inside the housing (1). The permanent magnet ring (42) is gapped outside the annular stator (3). The inner ring of the rotating ring (41) is fixed outside the permanent magnet ring (42), and its outer ring is fixed through the inner wall of the housing (1).

4. A drive motor with adaptive switching function for cooling oil passages according to claim 1, characterized in that, The spiral groove (811), the connecting rod (82), and the hammer ball (83) are all arranged in two symmetrical positions.

5. A drive motor with adaptive switching function for cooling oil passages according to claim 1, characterized in that, The cooling pipe assembly (7) includes a main cooling pipe (71), a spring (72), a weight (73), a first cooling branch pipe (74), and a second cooling branch pipe (75), all located within the housing (1). One end of the main cooling pipe (71) is connected to the oil control hole (51), and the other end is a closed end. The main cooling pipe (71) has a first oil hole (711) and a second oil hole (712) on its pipe wall near its closed end. The spring (72) is located inside the main cooling pipe (71), and one end of it is fixed to the inner closed end of the main cooling pipe (71). The weight (73) slides in a sealed manner inside the main cooling pipe (71) and is in contact with the spring (72). The spring (72) is in a natural state to close the second oil hole (712) or in a compressed state to open the second oil hole (712); the first refrigeration pipe (74) is annular and its pipe wall is provided with a first oil inlet hole and a plurality of first oil injection holes communicating with the first oil hole (711), and the plurality of first oil injection holes are arranged opposite to the end of the annular stator (3); the second refrigeration pipe (75) is annular and its pipe wall is provided with a second oil inlet hole and a plurality of second oil injection holes communicating with the second oil hole (712), and the plurality of second oil injection holes are respectively arranged opposite to the plurality of stator slots of the annular stator (3); The plurality of oil injection holes are a plurality of first oil injection holes and a plurality of second oil injection holes.

6. A drive motor with adaptive switching function for cooling oil passages according to claim 1, characterized in that, It also includes two limiting blocks (9) located inside the housing (1). The two limiting blocks (9) are fixed on the rotating shaft (2) on both sides of the inner moving cylinder (6) to limit the sliding position of the inner moving cylinder (6).

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