Oil absorption device

Abstract

The present disclosure relates to an oil suction device applied to a sump space of a vehicle. According to the oil suction device of the present disclosure, by adding a flow controller for controlling the suction resistance of oil suctioned to a supply pipe, it is possible to reduce an oil level difference, reduce an idle loss and a loss at the time of rotation of a rotor by reducing an oil level rise of an end plate, improve a cooling performance of a motor by preventing oil of the sump space from being depleted, while maintaining a reduction effect of reducing costs and reducing package size and weight, which is a trend of a conventional motor.

Description

Technical Field

[0001] This disclosure relates to an oil suction device for use in the sump space of a vehicle. Background Technology

[0002] In the tilting condition of the EDU system used to reflect the vehicle's turning and climbing conditions, the reservoir space needs to be located essentially in the middle of the oil circulation space. When the spaces of the motor and reducer are separated, there is a situation where the reservoir space is located in the middle of the motor. However, in order to reduce costs by omitting the sealing configuration and to improve efficiency by reducing torque loss (no-load loss), and because the motor-reducer space is opened coaxially, the reservoir space is located in the middle of the oil circulation space, that is, at the lower end of the intermediate housing.

[0003] However, because the storage space is located within the intermediate shell, the distance between the end plate and the end space (which is the internal space of the end plate) is relatively long. Furthermore, the cross-sectional area of ​​the oil flow path from the end to the suction space is also folded to reduce cost, weight, and packaging size. Therefore, when pumping oil, the oil pump concentrates on pumping oil from the space within the intermediate shell, and the oil introduced from the end plate has a load caused by suction resistance, resulting in a significantly reduced suction intensity compared to oil introduced from the intermediate shell.

[0004] However, because the end plates and intermediate plates have the same cooling structure, oil is sprayed evenly onto both plates, resulting in an imbalance in the amount of oil remaining in each plate. Consequently, when the motor is driven for an extended period, the oil level on the end plates rises while the oil level on the intermediate plates falls.

[0005] Due to the aforementioned issues, churning losses occur, and when the rotor is tilted, the oil cannot be drawn into the intermediate housing where the oil level is relatively low, resulting in a significant reduction in the motor's cooling performance.

[0006] In addition, because a 2-speed reducer is applied to the motor and the reducer is longer, it is difficult to solve the oil level imbalance even when the suction space is located in the middle and is formed as close as possible to the reducer. Therefore, it is difficult to suction oil from the middle housing when turning left or right.

[0007] Related technical documents

[0008] (Patent Document 1) Korean Patent No. 10-2022-0045317, published on April 12, 2020, entitled "oil recovery structure for cooling motor". Utility Model Content

[0009] This disclosure is made to solve the above-mentioned problems, and its purpose is to provide an oil suction device that reduces the oil level difference by adding a flow controller for controlling the suction resistance of the oil drawn into the supply pipe, reduces no-load losses and rotor rotation losses by reducing the rise of the oil level on the end plate, and improves the cooling performance of the motor by preventing the oil in the storage tank from being depleted, while maintaining the effects of reducing costs and reducing packaging size and weight, which is the trend of conventional motors.

[0010] To address the aforementioned problems, an oil suction device according to one embodiment of this disclosure is disposed in a storage tank space at the lower end of the intermediate plate of a motor. The oil suction device includes: a supply pipe, one end of which leads to the storage tank space and the other end of which is connected to the oil pump of the motor to draw oil flowing into the storage tank space and deliver the drawn oil to the oil pump of the motor; and a flow controller, which is connected to one end of the supply pipe, includes a space for oil flow, and is configured to control the flow rate of oil drawn into the supply pipe.

[0011] Additionally, one surface of the reservoir space faces one surface of the flow controller, an oil inlet hole is formed in the one surface of the reservoir space, through which oil is introduced into the end plate of the motor, and the flow controller includes a first hole formed through one surface of the flow controller.

[0012] Additionally, the other surface of the flow controller is closed.

[0013] Additionally, the flow controller includes a second hole formed through another surface of the flow controller, and the first hole and the second hole are connected.

[0014] In addition, the opening area of ​​the first hole is larger than the opening area of ​​the second hole.

[0015] Additionally, the first hole is formed to pass linearly through the flow controller in the axial direction of the motor, and the second hole is formed to pass through the flow controller so as to include at least one curved section.

[0016] In addition, the first hole is formed at a position corresponding to the position where the oil inlet hole is formed, and the first hole is formed at a position at a predetermined distance from the position where the oil inlet hole is formed along the axial direction of the motor.

[0017] In addition, the distance between one surface of the flow controller and one surface of the storage tank space is shorter than the distance between the other surface of the flow controller and the other surface of the storage tank space.

[0018] Additionally, the supply pipe includes an opening into which the flow controller is inserted at one end, and the opening leads to the side opposite to the side that opens to the interior space of the intermediate plate of the storage tank space, and is formed to expand in a funnel shape.

[0019] Additionally, the opening is formed to extend toward a surface of the storage tank space relative to one end of the supply pipe. Attached Figure Description

[0020] Figure 1 This is a partial cross-sectional view of a motor that utilizes the oil suction device disclosed herein.

[0021] Figure 2 This is a perspective view showing the oil suction device of this disclosure.

[0022] Figure 3 This is a partial perspective view of a motor using a first embodiment of the flow controller disclosed herein.

[0023] Figure 4 This is a partial perspective view of a motor using a second embodiment of the flow controller disclosed herein.

[0024] Figure 5 This is a schematic diagram illustrating a second-first embodiment of the flow controller of this disclosure.

[0025] Figure 6 This is a schematic diagram illustrating a second-second embodiment of the flow controller of this disclosure.

[0026] Figure 7 This is a partial cross-sectional view of the reservoir space of a motor that utilizes the oil suction device of this disclosure. Detailed Implementation

[0027] The technical spirit of this disclosure will be described in more detail below with reference to the accompanying drawings. Prior to this, the terms or words used in this disclosure should not be construed as limited to their ordinary or dictionary meanings, but should be interpreted as conforming to the meaning and concepts of the technical inventive idea of ​​this disclosure, based on the principle that the concepts of the terms can be appropriately defined in order to best describe the disclosure.

[0028] The following is for reference Figure 1 and Figure 2 The basic configuration of the oil suction device 1000 disclosed herein will be described.

[0029] like Figure 1 As shown, the oil suction device 1000 of this disclosure is disposed in the storage space S at the lower end of the intermediate plate M of the motor, and may include a supply pipe 100, which supplies oil from the storage space S to... Figure 2The oil pump is shown. More specifically, the supply pipe 100 may have one end leading to the reservoir space S and the other end communicating with the motor's oil pump. The supply pipe 100 may include a nozzle that generates a flow rate for drawing oil within one end. Thus, the supply pipe 100 can draw oil from the reservoir space S and deliver the drawn oil to the motor's oil pump. In this case, the reservoir space S may communicate with the internal space of the motor's intermediate plate M and may be positioned at the lower end of the intermediate plate M based on the phase mounted on the vehicle.

[0030] In addition, such as Figure 2 As shown, the oil suction device 1000 of this disclosure may include a flow controller 200. The flow controller 200 is a component injection molded as a single part and may include a polymer material. The flow controller 200 may be coupled to one end of the supply pipe 100, may include a space for oil flow, and may control the flow rate of oil drawn into the supply pipe 100. More specifically, oil delivered from the end plate E side of the supply pipe 100 can be suctioned with low resistance, and oil delivered from the opposite side can be suctioned with high resistance, such that oil introduced from the end plate E through the flow path is preferentially suctioned into the storage tank space S (oil introduced from the intermediate plate is regularly present in the storage tank space S), thereby eliminating the imbalance between the flow rate of oil introduced from the end plate E and the flow rate of oil introduced from the intermediate plate. Ultimately, agitation losses and no-load losses can be reduced, allowing the motor cooling system to operate smoothly even when the motor is tilted.

[0031] In the following text, reference will be made to Figures 3 to 7 The specific configuration of the flow controller 200 and supply pipe 100 of this disclosure is described in more detail below. The flow controller 200 may be referred to as a flow control unit. The flow controller 200 according to an exemplary embodiment of this disclosure can be a hardware device implemented by various electronic circuits (e.g., a computer, microprocessor, CPU, ASIC, circuit, logic circuit, etc.). The processor can be implemented by a non-transitory memory storing, for example, programs, software instruction reproduction algorithms, etc., and a processor configured to execute the programs, software instruction reproduction algorithms, etc., which, when executed, perform the various functions described below. Here, the memory and processor can be implemented as separate semiconductor circuits. Alternatively, the memory and processor can be implemented as a single integrated semiconductor circuit. The processor can be embodied as one or more processors.

[0032] like Figure 3As shown, the flow controller 200 can be configured such that one surface of it faces a surface of the storage tank space S, in which an oil inlet hole H is formed, through which oil is introduced into the end plate. Additionally, the flow controller 200 may include a first hole 210 formed through one of its surfaces. By configuring the first hole 210 to face the oil inlet hole, oil introduced from the end plate E side can be directly introduced through the first hole 210 (solid arrow), while oil regularly flowing into the intermediate plate in the storage tank space S can be guided to flow along a complex path, thereby flowing into the flow controller 200 and then into one end of the supply pipe 100 (dashed arrow).

[0033] Furthermore, the first hole 210 can be formed at a position corresponding to the position where the oil inlet hole H is formed, and at a predetermined distance from the position where the oil inlet hole H is formed along the axial direction of the motor. Therefore, oil discharged from the end plate E side of the oil inlet hole can flow directly into the first hole 210, and the suction flow resistance can be minimized.

[0034] In this case, in the first embodiment of the flow controller 200, the other surface of the flow controller 200 is closed. Therefore, oil flowing into the storage tank space S from the intermediate plate side can be introduced only through the first hole 210, and the flow resistance of the oil introduced from the intermediate plate side during suction can be further increased.

[0035] In addition, Figure 4 In a second embodiment of the flow controller 200 shown, the flow controller 200 may include a second hole 220 formed through its other surface, and the first hole 210 and the second hole 220 may be connected. Therefore, oil introduced from the end plate E side can be directly introduced through the first hole 210 (solid arrow), while oil regularly flowing into the intermediate plate of the reservoir space S can be guided to flow along a complex path, thereby flowing into the flow controller 200, and further, into one end of the supply pipe 100, or introduced through the second hole 220 formed through the other surface of the flow controller 200 (dashed arrow).

[0036] At this time, Figure 5 In the second-first embodiment of the flow controller 200 shown, the opening area of ​​the first hole 210 can be larger than the opening area of ​​the second hole 220. Since most of the oil introduced from the end plate E side is drawn through the first hole 210, most of the oil introduced through the second hole 220 is oil from the intermediate plate. Accordingly, by configuring the opening area of ​​the second hole 220 to be significantly smaller than the opening area of ​​the first hole 210, it is possible to prevent a large amount of oil from being introduced from the intermediate plate side.

[0037] In the second-first embodiment of the flow controller 200, since the other surface of the flow controller 200 is not completely closed but partially open through the second hole 220, excessive resistance to the oil introduced from the intermediate plate can be prevented. Therefore, the oil on the end plate E side and the oil on the intermediate plate side can be drawn evenly into the supply pipe 100, and even if the suction intensity increases, excessive load can be prevented from being applied to the flow controller 200.

[0038] In addition, Figure 6 In the second-2 embodiment of the flow controller 200 shown, the first hole 210 can be formed to linearly pass through the flow controller 200 in the axial direction of the motor, and the second hole 220 can be formed to pass through the flow controller 200 to include at least one curved section. Thus, the flow resistance of the oil introduced through the second hole 220, i.e., the oil introduced from the intermediate plate, can be increased during suction. In this case, in one usage example, when the design of the second hole 220 is changed and applied, the suction resistance of the oil on the end plate E side and the suction resistance of the oil on the intermediate plate side can be adjusted to be substantially the same.

[0039] like Figure 7 As shown, the distance d1 between one surface of the flow controller 200 and one surface of the storage tank space S can be shorter than the distance d2 between the other surface of the flow controller 200 and the other surface of the storage tank space S. That is, by bringing one surface of the flow controller 200 closer to the oil inlet hole H, the suction resistance for oil introduced from the end plate E side can be further reduced, and the suction resistance for oil introduced from the intermediate plate side can be further increased.

[0040] In addition, such as Figure 7 As shown, the supply pipe 100 may include a funnel-shaped opening 110 formed at one end thereto. The opening 110 can be assembled by inserting a flow controller 200 into one end thereto, and a predetermined step can be formed to protrude from the opening 110, allowing the flow controller 200 to be assembled. Additionally, the opening 110 may open to a side opposite to the side that opens to the interior space of the intermediate plate M of the storage tank space S. In this case, the surface of the side of the flow controller 200 with the opening 110 open (the surface perpendicular to one surface and the other surface) can be closed. Therefore, oil can be drawn in only through the first hole 210 or the second hole 220 formed in one surface and the other surface of the flow controller 200, and the flow of oil can be controlled more precisely.

[0041] In this case, based on one end of the supply pipe 100, the length of the opening 110 extending toward one surface of the storage space S can be greater than the length of the opening 110 extending toward the other surface. Therefore, one surface of the flow controller 200 can be positioned closer to the oil inlet hole H side, and the inclination of the opening 110 on the end plate E side can be formed to be gentler than the inclination of the opposite side, thereby reducing the suction resistance of the oil introduced from the end plate E side (i.e., the oil introduced from the end plate E).

[0042] Furthermore, while the primary objective of this disclosure is to adjust the oil levels on the end plate E and the intermediate plate M, this disclosure also enables a future method to achieve a difference in oil level between the reducer and the motor. For example, the oil level on the reducer can be lowered to reduce churning losses, and the oil level on the motor side can be kept slightly higher for low-oil cooling. More specifically, the oil suction device 1000 of this disclosure can be configured such that the first hole 210 is located on the reducer side, and the second hole 220 is located on the intermediate plate M side and the end plate E side. In this case, the specific dimensions and positions of the first hole 210 and the second hole 220 can be selected through analysis and testing.

[0043] According to the oil suction device of this disclosure with the above configuration, by adding a flow controller for controlling the suction resistance of the oil sucked into the supply pipe, the oil level difference can be reduced, the no-load loss and the loss during rotor rotation can be reduced by reducing the rise of the oil level on the end plate, and the cooling performance of the motor can be improved by preventing the oil in the storage tank space from being exhausted, while maintaining the effects of reducing costs and reducing packaging size and weight, which is the trend of conventional motors.

[0044] The technical spirit of this disclosure should not be construed as limited to the embodiments described above. Not only is the scope of application diverse, but various modifications can be made by those skilled in the art without departing from the spirit of this disclosure. Therefore, any improvements and changes that are obvious to those skilled in the art fall within the scope of this disclosure.

[0045] Cross-references to related applications

[0046] This application claims priority to Korean Patent Application No. 10-2024-0072876, filed on June 4, 2024, the entire contents of which are incorporated herein by reference for all purposes.

Claims

1. An oil suction device, characterized in that, The oil suction device is disposed in the storage tank space at the lower end of the intermediate plate of the motor, and the oil suction device includes: A supply pipe, one end of which leads to the storage tank space, and the other end of which is connected to the oil pump of the motor, for drawing oil flowing into the storage tank space and delivering the drawn oil to the oil pump of the motor; and A flow controller is connected to one end of the supply pipe, includes space for oil flow, and is configured to control the flow rate of oil drawn into the supply pipe.

2. The oil suction device according to claim 1, characterized in that, One surface of the reservoir space faces one surface of the flow controller, and an oil inlet hole is formed in the one surface of the reservoir space through which oil from the end plate of the motor is introduced. The flow controller includes a first hole formed through a surface of the flow controller.

3. The oil suction device according to claim 2, characterized in that, The other surface of the flow controller is closed.

4. The oil suction device according to claim 2, characterized in that, The flow controller includes a second hole formed through another surface of the flow controller, and The first hole and the second hole are connected.

5. The oil suction device according to claim 4, characterized in that, The opening area of ​​the first hole is larger than the opening area of ​​the second hole.

6. The oil suction device according to claim 4, characterized in that, The first hole is formed to pass linearly through the flow controller in the axial direction of the motor, and The second hole is formed through the flow controller to include at least one curved section.

7. The oil suction device according to claim 2, characterized in that, The first hole is formed at a position corresponding to the location where the oil inlet hole is formed, and The first hole is formed at a predetermined distance from the location where the oil inlet hole is formed along the axial direction of the motor.

8. The oil suction device according to claim 2, characterized in that, The distance between one surface of the flow controller and one surface of the storage tank space is shorter than the distance between the other surface of the flow controller and the other surface of the storage tank space.

9. The oil suction device according to claim 1, characterized in that, The supply pipe includes an opening, one end of which is into which the flow controller is inserted, and The opening leads to the side opposite to the side that opens to the interior space of the intermediate plate of the storage tank space, and the opening is formed to expand in a funnel shape.

10. The oil suction device according to claim 9, characterized in that, The opening is formed to extend toward a surface of the storage tank space relative to one end of the supply pipe.

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