Drive device

Abstract

The present application relates to a drive device having: a first motor that drives a left wheel; the second motor drives the right wheel; a lubricating oil storage tank; the partition wall is arranged on the bottom surface of the lubricating oil storage tank and divides the lubricating oil storage tank into a left lubricating oil storage tank and a right lubricating oil storage tank; a first oil pump that sucks in lubricating oil from a suction port that opens in the bottom surface of the left lubricating oil storage tank, and that supplies the suctioned lubricating oil to the first motor; and a second oil pump that sucks in the lubricating oil from a suction port that opens in the bottom surface of the right lubricating oil storage tank, and that supplies the suctioned lubricating oil to the second motor. The partition wall is provided with a through hole extending from the left lubricating oil storage tank to the right lubricating oil storage tank. There is an obturator that occludes the through-hole when acceleration is applied in the lateral direction.

Description

Technical Field

[0001] The technology disclosed in this specification relates to a drive device. Background Art

[0002] Japanese Patent Application Laid-Open No. 2008-283836 discloses an electric vehicle that drives left and right wheels using a single motor. The driving device of this electric vehicle has a first motor and a second motor. The driving force of the first motor is transmitted to the left wheel, and the driving force of the second motor is transmitted to the right wheel. Summary of the invention

[0003] An oil pump for supplying lubricating oil to the motor is provided in the electric vehicle. The motor is cooled by supplying lubricating oil to the motor. In a drive device having a first motor and a second motor, a first oil pump for supplying lubricating oil to the first motor and a second oil pump for supplying lubricating oil to the second motor can be independently provided. Thus, when the first oil pump and the second oil pump are provided, the flow rate of the lubricating oil supplied to the first motor and the flow rate of the lubricating oil supplied to the second motor can be individually controlled. Thus, the temperature of the first motor and the temperature of the second motor can be appropriately controlled.

[0004] In the case where the drive device has a first oil pump and a second oil pump, there are a suction port of the first oil pump and a suction port of the second oil pump on the bottom surface of the lubricating oil storage tank. When acceleration is applied to the electric vehicle in the lateral direction, the lubricating oil in the lubricating oil storage tank is biased to one of the left and right sides. In this way, when the lubricating oil in the lubricating oil storage tank is distributed in an offset manner, the liquid level of the lubricating oil is reduced at the upper part of one of the suction ports of the first oil pump and the second oil pump, and one of the oil pumps cannot suck in the lubricating oil. In this case, cooling of the first motor or the second motor becomes difficult. In this specification, a drive device is proposed, in which both the first oil pump and the second oil pump can normally absorb the lubricating oil even when acceleration is applied to the vehicle in the lateral direction.

[0005] The driving device disclosed in this specification includes:

[0006] a first electric motor driving a left wheel of the vehicle;

[0007] a second electric motor driving a right wheel of the vehicle;

[0008] Lubricating oil storage tank;

[0009] a partition wall, the partition wall being arranged on the bottom surface of the lubricating oil storage tank and dividing the lubricating oil storage tank into a left lubricating oil storage tank and a right lubricating oil storage tank;

[0010] a first oil pump that sucks lubricating oil from a suction port opened at a bottom surface of the left lubricating oil storage tank and supplies the sucked lubricating oil to the first electric motor; and

[0011] a second oil pump, the second oil pump sucking lubricating oil from a suction port opened at the bottom surface of the right lubricating oil storage tank and supplying the sucked lubricating oil to the second electric motor,

[0012] The partition wall is provided with a through hole extending from the left lubricating oil storage tank to the right lubricating oil storage tank.

[0013] A blocker is provided, and when acceleration is applied to the vehicle in a lateral direction, the blocker blocks the through hole.

[0014] In the drive device, the lubricating oil storage tank is divided into a left lubricating oil storage tank and a right lubricating oil storage tank by a partition wall. Since a through hole is provided on the partition wall, the lubricating oil can flow between the left lubricating oil storage tank and the right lubricating oil storage tank under normal circumstances. Therefore, under normal circumstances, the lubricating oil is roughly evenly distributed in the left lubricating oil storage tank and the right lubricating oil storage tank, and the first oil pump and the second oil pump can both properly suck the lubricating oil. In addition, when acceleration is applied to the vehicle in the lateral direction, the through hole is blocked by a blocker. Therefore, the lubricating oil cannot flow between the left lubricating oil storage tank and the right lubricating oil storage tank. Thus, the lubricating oil is suppressed from being distributed biasedly between the left lubricating oil storage tank and the right lubricating oil storage tank. Therefore, even when acceleration is applied to the vehicle in the lateral direction, a sufficient amount of lubricating oil can be stored in the left lubricating oil storage tank and the right lubricating oil storage tank. Therefore, the first oil pump and the second oil pump can both properly suck the lubricating oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Hereinafter, features, advantages, and technical and industrial significance of exemplary embodiments of the present invention will be described with reference to the accompanying drawings, in which like reference numerals represent like components, and in which:

[0016] Figure 1 is a cross-sectional view of the drive device along the left-right direction and the front-back direction;

[0017] Figure 2 It is along Figure 1 A longitudinal sectional view of the driving device of line AA;

[0018] Figure 3 It is a longitudinal sectional view of the partition wall 60 and its surroundings along the left-right direction;

[0019] Figure 4A 60 and the blocking device;

[0020] Figure 4B 60 and the blocking device;

[0021] Figure 4C 60 and the blocking device;

[0022] Figure 5 It is a diagram showing a modified example of the partition wall 60 and the stopper. DETAILED DESCRIPTION

[0023] The following lists additional features of the drive device disclosed in this specification.

[0024] The drive device may also include a first gear and a second gear, wherein the first gear is immersed in the lubricating oil in the left lubricating oil storage tank, and the second gear is immersed in the lubricating oil in the right lubricating oil storage tank. The first gear can transmit the driving force of the first motor to the left wheel, and the second gear can transmit the driving force of the second motor to the right wheel.

[0025] According to this structure, the first gear is used to spread the lubricating oil in the left lubricating oil storage tank, and the second gear is used to spread the lubricating oil in the right lubricating oil storage tank. Each gear is lubricated by the spread lubricating oil. As described above, when the vehicle is accelerated in the lateral direction, since the through hole is blocked, the liquid level of the lubricating oil in the left lubricating oil storage tank and the right lubricating oil storage tank is not easily reduced. Therefore, even when the vehicle is accelerated in the lateral direction, each gear can spread the lubricating oil.

[0026] Alternatively, when acceleration is applied to the vehicle in the lateral and front-rear directions, the plug blocks the through hole. In this case, the left side of the partition wall is inclined relative to the front-rear direction, and the right side of the partition wall is inclined relative to the front-rear direction in a direction opposite to the inclination direction of the left side.

[0027] According to this configuration, when the vehicle travels around a corner while accelerating or decelerating, the through hole can be closed.

[0028] The partition wall may also be arranged at the center of the lubricating oil storage tank in the lateral direction. In addition, the partition wall may also extend along the front-rear direction of the vehicle.

[0029] The obturator may also include an obturator member disposed at a position opposite to the through hole. The obturator member may also be a plate or a ball. The obturator member may also be suspended. The plate or the ball may also be disposed in each of the right lubricating oil storage tank and the left lubricating oil storage tank.

[0030] Figure 1 The driving device 10 of the embodiment shown is mounted on an electric vehicle. Figure 1In FIG. 1 , arrow FR indicates the front of the vehicle, and arrow RH indicates the right of the vehicle. The drive device 10 drives a left rear wheel 90 and a right rear wheel 92 of the electric vehicle.

[0031] The drive device 10 has a housing 12. Inside the housing 12, a left motor chamber 13, a right motor chamber 15, and a gear chamber 17 are provided. The gear chamber 17 also functions as a lubricating oil storage tank for storing lubricating oil. The gear chamber 17 is divided into a left gear chamber 14 and a right gear chamber 16 by a partition wall 60. The partition wall 60 extends in the front-rear direction and is arranged at the center of the gear chamber 17 in the lateral direction. The left gear chamber 14 is arranged at the rear of the left motor chamber 13. The right motor chamber 15 is arranged at the right side of the left motor chamber 13. The right gear chamber 16 is arranged at the rear of the right motor chamber 15. The left motor 20 is accommodated in the left motor chamber 13. The left gear chamber 14 accommodates a gear group for transmitting the driving force of the left motor 20 to the left rear wheel 90. The right motor chamber 15 accommodates the right motor 40. The right gear chamber 16 accommodates a gear group for transmitting the driving force of the right motor 40 to the right rear wheel 92.

[0032] The left electric motor 20 has a rotor 20a and a stator 20b. The rotor 20a has a shaft 20c. The rotor 20a is housed in the left motor chamber 13 in an orientation such that the shaft 20c extends in the front-rear direction of the electric vehicle. The rotor 20a is rotatably supported by a bearing (not shown) provided in the housing 12. The shaft 20c passes through the partition wall between the left motor chamber 13 and the left gear chamber 14, and extends from the left motor chamber 13 to the left gear chamber 14. The stator 20b is arranged around the rotor 20a. By passing current through the stator 20b, the rotor 20a rotates.

[0033] The gear set provided in the left gear chamber 14 includes gears 22, 23, 24, and 25. In addition, a countershaft 26 and a drive shaft 27 are provided in the left gear chamber 14. The countershaft 26 is provided in parallel with the shaft 20c of the rotor 20a. The countershaft 26 is rotatably supported by a bearing (not shown) provided in the housing 12. The drive shaft 27 extends in the left-right direction of the electric vehicle. The drive shaft 27 extends from the left gear chamber 12 through the left side wall of the housing 12 to the outside of the housing 12. The left rear wheel 90 is connected to the left end of the drive shaft 27. The drive shaft 27 is rotatably supported by a bearing (not shown) provided in the housing 12. The gear 22 is a cylindrical gear fixed to the shaft 20c of the rotor 20a. The gear 23 is a cylindrical gear fixed to the countershaft 26. The gear 23 meshes with the gear 22. The gear 24 is a truncated cone gear fixed to the countershaft 26. The gear 25 is a truncated cone gear, and is fixed to the drive shaft 27. The gear 25 meshes with the gear 24. The gear 24 and the gear 25 constitute a hypoid gear.

[0034] When the shaft 20c of the rotor 20a is rotated by the left motor 20, the gear 22 rotates, and the driving force is transmitted from the gear 22 to the gear 23. Therefore, the gear 23, the countershaft 26, and the gear 24 rotate. When the gear 24 rotates, the driving force is transmitted from the gear 24 to the gear 25. Therefore, the gear 25 and the drive shaft 27 rotate, and as a result, the left rear wheel 90 rotates. In this way, each gear in the left gear chamber 14 transmits the driving force of the left motor 20 to the left rear wheel 90.

[0035] like Figure 2 As shown in FIG. 1 , the bottom surface of the left gear chamber 14 is arranged to be lower than the bottom surface of the left motor chamber 13. Lubricating oil 80 is stored in the left gear chamber 14 at a level such that the lower part of the gear 25 is immersed therein. Therefore, when the gear 25 is rotated by the drive of the left motor 20, the lubricating oil 80 stored in the left gear chamber 14 is splashed by the gear 25. Thus, the lubricating oil is spread in the left gear chamber 14. The gears are lubricated by the lubricating oil spread in the left gear chamber 14.

[0036] The drive device 10 has a left lubricating oil circulation path for circulating lubricating oil in the left motor chamber 13 and the left gear chamber 14. The left lubricating oil circulation path has an oil pump 30, a lubricating oil supply path 31, an axial flow path 32, a lubricating oil flow path 33, a lubricating oil suction port 34 and a lubricating oil suction path 35. The lubricating oil supply path 31 is composed of a pipe outside the housing 12 and a flow path provided in the outer wall of the housing 12. The shaft 20c of the rotor 20a has a cylindrical shape, and the axial flow path 32 is formed by its center hole. The axial flow path 32 extends from the front end to the rear end of the shaft 20c. The lubricating oil supply path 31 connects the discharge port of the oil pump 30 with the front end of the axial flow path 32. A plurality of lubricating oil distribution flow paths 32a are provided on the outer peripheral wall of the shaft 20c. The oil flow path 33 penetrates the partition wall between the left motor chamber 13 and the left gear chamber 14. The lubricating oil suction port 34 opens at the bottom surface of the left gear chamber 14. The lubricating oil suction path 35 is constituted by a pipe outside the housing 12. The lubricating oil suction path 35 connects the lubricating oil suction port 34 and the suction port of the oil pump 20.

[0037] When the oil pump 30 is operated, the lubricating oil 80 stored in the left gear chamber 14 is sucked into the lubricating oil suction port 34. The lubricating oil sucked into the lubricating oil suction port 34 is supplied to the axial flow path 32 through the lubricating oil suction path 35, the oil pump 30 and the lubricating oil supply path 31. In the axial flow path 32, the lubricating oil flows from the front end to the rear end of the axial flow path 32. The lubricating oil flowing to the rear end in the axial flow path 32 is discharged into the left gear chamber 14. In addition, a part of the lubricating oil flowing in the axial flow path 32 is dispersed into the left motor chamber 13 from the lubricating oil dispersion flow path 32a. The left motor 20 is cooled by the lubricating oil flowing in the axial flow path 32 and the lubricating oil dispersed in the left motor chamber 13. In addition, the rotor 20a is lubricated by the lubricating oil dispersed in the left motor chamber 13. The lubricating oil dispersed in the left motor chamber 13 flows to the left gear chamber 14 through the lubricating oil flow path 33. As the oil pump 30 operates in this manner, the lubricating oil circulates in the left lubricating oil circulation path, thereby cooling the left motor room 20 .

[0038] The structure in the right motor chamber 15 and the right gear chamber 16 is the same as the structure in which the structure in the left motor chamber 13 and the left gear chamber 14 is reversed left and right. The right motor 40 has a rotor 40a and a stator 40b. The rotor 40a has a shaft 40c. The rotor 40a is housed in the right motor chamber 15 in an orientation such that the shaft 40c extends in the front-rear direction of the electric vehicle. The rotor 40a is rotatably supported by a bearing (not shown) provided in the housing 12. The shaft 40c passes through the partition wall between the right motor chamber 15 and the right gear chamber 16, and extends from the right motor chamber 15 to the right gear chamber 16. The stator 40b is arranged around the rotor 40a. By passing current through the stator 40b, the rotor 40a rotates.

[0039] The gear set provided in the right gear chamber 16 includes gears 42, 43, 44, and 45. In addition, a countershaft 46 and a drive shaft 47 are provided in the right gear chamber 16. The countershaft 46 is provided in parallel with the shaft 40c of the rotor 40a. The countershaft 46 is rotatably supported by a bearing (not shown) provided in the housing 12. The drive shaft 47 extends in the left-right direction of the electric vehicle. The drive shaft 47 extends from the right gear chamber 16 through the right side wall of the housing 12 to the outside of the housing 12. The right rear wheel 92 is connected to the right end of the drive shaft 47. The drive shaft 47 is rotatably supported by a bearing (not shown) provided in the housing 12. The gear 42 is a cylindrical gear fixed to the shaft 40c of the rotor 40a. The gear 43 is a cylindrical gear fixed to the countershaft 46. The gear 43 meshes with the gear 42. The gear 44 is a conical gear fixed to the countershaft 46. The gear 45 is a conical gear, and is fixed to the drive shaft 47. The gear 45 meshes with the gear 44. The gear 44 and the gear 45 constitute a hypoid gear.

[0040] When the right motor 40 is driven to rotate the shaft 40c, the driving force is transmitted from the shaft 40c to the drive shaft 47 via the gears 42, 43, 44, and 45. As a result, the drive shaft 47 rotates, and the right rear wheel 92 rotates. In this way, each gear in the right gear chamber 16 transmits the driving force of the right motor 40 to the right rear wheel 92.

[0041] and Figure 2 Similarly, the bottom surface of the right gear chamber 16 is arranged to be lower than the bottom surface of the right motor chamber 15. Lubricating oil is stored in the right gear chamber 16 at a level such that the lower part of the gear 45 is immersed. Therefore, when the gear 45 is rotated by the drive of the right motor 40, the lubricating oil stored in the right gear chamber 16 is splashed by the gear 45. Thus, the lubricating oil is spread in the right gear chamber 16. The gears are lubricated by the lubricating oil spread in the right gear chamber 16.

[0042] The drive device 10 has a right lubricating oil circulation path for circulating lubricating oil in the right motor chamber 15 and the right gear chamber 16. The right lubricating oil circulation path has an oil pump 50, a lubricating oil supply path 51, an axial flow path 52, a lubricating oil flow path 53, a lubricating oil suction port 54 and a lubricating oil suction path 55. The lubricating oil supply path 51 is composed of a pipe outside the housing 12 and a flow path provided in the outer wall of the housing 12. The shaft 40c of the rotor 40a has a cylindrical shape, and the axial flow path 52 is formed by its center hole. The axial flow path 52 extends from the front end to the rear end of the shaft 40c. The lubricating oil supply path 51 connects the discharge port of the oil pump 50 and the front end of the axial flow path 52. A plurality of lubricating oil distribution flow paths 52a are provided on the outer peripheral wall of the shaft 40c. The lubricating oil flow path 53 penetrates the partition wall between the right motor chamber 15 and the right gear chamber 16. The lubricating oil suction port 54 opens at the bottom surface of the right gear chamber 16. The lubricating oil suction path 55 is constituted by a pipe outside the housing 12. The lubricating oil suction path 55 connects the lubricating oil suction port 54 and the suction port of the oil pump 50.

[0043] When the oil pump 50 is operated, the lubricating oil stored in the right gear chamber 16 is supplied to the axial flow path 52 through the lubricating oil suction port 54, the lubricating oil suction path 55, the oil pump 50 and the lubricating oil supply path 51. The lubricating oil flowing from the front end to the rear end in the axial flow path 52 is discharged into the right gear chamber 16. In addition, a part of the lubricating oil flowing in the axial flow path 52 is dispersed into the right motor chamber 15 from the lubricating oil dispersion flow path 52a. The right motor 40 is cooled by the lubricating oil flowing in the axial flow path 52 and the lubricating oil dispersed into the right motor chamber 15. In addition, the rotor 40a is lubricated by the lubricating oil dispersed into the right motor chamber 15. The lubricating oil dispersed into the right motor chamber 15 flows into the right gear chamber 16 through the lubricating oil flow path 53. In this way, by the operation of the oil pump 50, the lubricating oil circulates in the right lubricating oil circulation path to cool the right motor.

[0044] The partition wall 60 is provided with a through hole 62. The through hole 62 extends from the left gear chamber 14 to the right gear chamber 16. Thus, lubricating oil can flow between the left gear chamber 14 and the right gear chamber 16 through the through hole 62.

[0045] Figure 3 denoted a cross section of the partition wall 60. Figure 3 As shown, the partition wall 60 is vertically arranged on the bottom surface of the gear chamber 17. A partition is provided between the partition wall 60 and the top surface of the gear chamber 17. Thus, the left gear chamber 14 and the right gear chamber 16 are connected at the upper part of the partition wall 60. However, the partition wall 60 may also extend to the top surface of the gear chamber 17. The partition wall 60 is composed of a left side plate 60a and a right side plate 60b. The upper end of the left side plate 60a and the upper end of the right side plate 60b are connected to each other. A space 64 is provided between the left side plate 60a and the right side plate 60b (i.e., inside the partition wall 60). A through hole 62a is provided on the left side plate 60a, and a through hole 62b is provided on the right side plate 60b. The through holes 62a and 62b constitute a through hole 62 that passes through the partition wall 60 on the left and right. A baffle 66 is arranged in the space 64 inside the partition wall 60. The baffle 66 is suspended from the upper end of the partition wall 60. The baffle 66 extends along the front-rear direction of the vehicle. The baffle 66 is arranged between the through holes 62a and 62b. That is, the baffle 66 is arranged at a position opposite to the through holes 62a and 62b. Normally (that is, when no acceleration is applied to the vehicle), the baffle 66 does not block the through holes 62a and 62b. The baffle 66 can swing left and right around the upper end of the partition wall 60.

[0046] Figure 3 The line L1 represents the position of the lubricating oil level in normal conditions (i.e., when no acceleration is applied to the vehicle). The lubricating oil level is located above the through holes 62a and 62b. Figure 3 In the embodiment, the liquid level of the lubricating oil is located below the upper end of the partition wall 60, but the liquid level of the lubricating oil may be located above the upper end of the partition wall 60. Since the baffle 66 does not block the through holes 62a and 62b in normal times, the liquid level of the lubricating oil is equal between the left gear chamber 14 and the right gear chamber 16.

[0047] When the vehicle travels on a curved road, etc., acceleration is applied to the vehicle in the lateral direction. When acceleration is applied to the lubricating oil in the lateral direction, the distribution of the lubricating oil in the gear chamber 17 changes. Figure 3 Lines L2 and L3 represent the liquid level of the lubricating oil when the vehicle is accelerated to the right. Line L2 represents the case where the baffle plate 66 is not present as a comparative example, and line L3 represents the case where the baffle plate 66 is present.

[0048] In the absence of the baffle 66, the through hole 62 is not blocked. Therefore, when the lubricating oil is accelerated in the right direction, the lubricating oil flows from the left gear chamber 14 to the right gear chamber 16 through the through hole 62. Figure 3 As shown by the line L2, the level of the lubricating oil in the right gear chamber 16 rises, and the level of the lubricating oil in the left gear chamber 14 decreases. Figure 3 In the embodiment of the present invention, the lubricating oil suction port 34 is exposed from the lubricating oil. Thus, when the lubricating oil suction port 34 is exposed, the oil pump 30 cannot supply the lubricating oil to the left motor 20, and the cooling of the left motor 20 becomes difficult. In addition, when the liquid level of the lubricating oil in the left gear chamber 14 is lowered, the entire gear 25 is exposed from the lubricating oil, and the lubricating oil cannot be spread using the gear 25. As a result, the lubricity of the gears in the left gear chamber 14 is reduced. Similarly, when the acceleration is applied to the lubricating oil in the left direction, the cooling of the right motor 40 becomes difficult, and the lubricity of the gears in the right gear chamber 16 is reduced.

[0049] On the other hand, when the baffle 66 is present (i.e., in the embodiment), when the vehicle is accelerated to the right, the baffle 66 swings to the right and closes the through hole 62b. Therefore, the lubricating oil is prevented from flowing from the left gear chamber 14 to the right gear chamber 16. Thus, the level of the lubricating oil in the left gear chamber 14 is prevented from decreasing. Figure 3 As shown by the line L3, the lubricating oil suction port 34 is prevented from being exposed to the lubricating oil. Therefore, the oil pump 30 can be used to supply lubricating oil to the left motor 20, and the left motor 20 can be properly cooled. In addition, since the liquid level of the lubricating oil in the left gear chamber is prevented from decreasing, the gear 25 can be used to spread the lubricating oil into the left gear chamber 14. In other words, the lubricity of the gears in the left gear chamber 14 will not be reduced. Similarly, when acceleration is applied to the lubricating oil in the left direction, the baffle 66 swings to the left and closes the through hole 62a. Therefore, the oil pump 50 can be used to supply lubricating oil to the right motor 40, and the right motor 40 can be properly cooled. In addition, the lubricity of the gears in the right gear chamber 16 will not be reduced.

[0050] As described above, according to the drive device 10 of the embodiment, even when acceleration is applied to the vehicle in the lateral direction, both the oil pumps 30 and 50 can properly suck in lubricating oil and can properly cool the left motor 20 and the right motor 40 .

[0051] The baffle 66 is an example of a stopper that closes the through hole 62 when acceleration is applied in the lateral direction. The stopper may have any structure as long as it can close the through hole 62 when acceleration is applied in the lateral direction. FIG. 4A to FIG. 4C Modifications of the partition wall 60 and the stopper are shown.

[0052] exist Figure 4AIn the embodiment, the partition wall 60 is composed of a single plate. A baffle 66a is arranged on the left side of a through hole 62 penetrating the partition wall 60, and a baffle 66b is arranged on the right side of the through hole 62. When acceleration is applied to the right direction, the baffle 66a swings to the right side and blocks the through hole 62, and when acceleration is applied to the left direction, the baffle 66b swings to the left side and blocks the through hole 62.

[0053] exist Figure 4B In the embodiment, two baffles 66a and 66b are arranged in the space 64 inside the partition wall 60. When acceleration is applied to the right direction, the baffle 66b swings to the right and closes the through hole 62b, and when acceleration is applied to the left direction, the baffle 66a swings to the left and closes the through hole 62a.

[0054] exist Figure 4C In the embodiment, the partition wall 60 is composed of a single plate. A ball 66c is arranged on the left side of the through hole 62 penetrating the partition wall 60, and a ball 66d is arranged on the right side of the through hole 62. Each ball 66c, 66d can move left and right using a guide rail. Normally, each ball 66c, 66d is arranged at a position separated from the partition wall 60 and does not block the through hole 62. When acceleration is applied to the right direction, the ball 66c moves to the right side and blocks the through hole 62, and when acceleration is applied to the left direction, the ball 66d moves to the left side and blocks the through hole 62.

[0055] Figure 5 60 and the modification of the obturator. Figure 5 In the figure, the left side plate 60a is configured so that it is displaced more to the left side as it is closer to the front side, and the right side plate 60b is configured so that it is displaced more to the right side as it is closer to the front side. In the space 64 inside the partition wall 60, two baffles 66a and 66b are configured. The baffle 66a is opposite to the through hole 62a, and the baffle 66b is opposite to the through hole 62b. The center of the baffle 66a is located in front of the center of the through hole 62a, and the center of the baffle 66b is located in front of the center of the through hole 62b. When acceleration is applied to the right oblique rear direction (that is, when acceleration is applied in both the right direction and the rear direction), the baffle 66b blocks the through hole 62b, and when acceleration is applied to the left oblique rear direction (that is, when acceleration is applied in both the left direction and the rear direction), the baffle 66a blocks the through hole 62a. In this way, in Figure 5 In the structure, when acceleration is applied to the lateral and rearward directions at the same time, the through hole 62 is blocked. When the lubricating oil suction port 34, 54 is arranged at a position close to the front end of the gear chamber 17, when acceleration is applied to the lubricating oil in the rearward direction (that is, when the vehicle is accelerated), the lubricating oil suction port 34, 54 is easy to be exposed from the lubricating oil. In this case, it is also possible to adopt Figure 5The structure is formed so that when acceleration is applied to the lateral direction and the rearward direction at the same time, the through hole 62 is blocked. Figure 5 The structure is reversed front to back, so that when acceleration is applied to the lubricating oil in the lateral direction and the forward direction at the same time, the through hole 62 is blocked.

[0056] In the above-described embodiment, the gear chamber 17 functions as a lubricating oil storage tank for storing lubricating oil supplied to the oil pumps 30 and 50. However, a lubricating oil storage tank may be provided separately from the gear chamber 17.

[0057] In the above embodiment, the motor is cooled by the lubricating oil discharged by the oil pump flowing inside the shaft of the rotor. However, as long as the motor can be cooled, the lubricating oil may be supplied from the oil pump to the motor in any form. For example, the lubricating oil may be discharged from the lubricating oil supply path to the outer peripheral surface of the rotor.

[0058] The above describes the implementation methods in detail, but these are only examples and do not limit the scope of the claims. The technology described in the claims includes various ways of deforming and changing the specific examples illustrated above. The technical elements described in this specification or the drawings can exert technical usefulness alone or in various combinations, and are not limited to the combinations recorded in the claims at the time of application. In addition, the technology illustrated in this specification or the drawings achieves multiple purposes at the same time, and achieving one of the purposes itself has technical usefulness.

Claims

1. A driving device, wherein: include: a first electric motor driving a left wheel of the vehicle; a second electric motor driving a right wheel of the vehicle; Lubricating oil storage tank; a partition wall, the partition wall being disposed on a bottom surface of the lubricating oil storage tank and dividing the lubricating oil storage tank into a left lubricating oil storage tank and a right lubricating oil storage tank; a first oil pump that sucks lubricating oil from a suction port opened at a bottom surface of the left lubricating oil storage tank and supplies the sucked lubricating oil to the first motor; as well as a second oil pump that sucks lubricating oil from a suction port opened at a bottom surface of the right lubricating oil storage tank and supplies the sucked lubricating oil to the second electric motor, The partition wall is provided with a through hole extending from the left lubricating oil storage tank to the right lubricating oil storage tank. The driving mechanism includes a blocker that blocks the through hole when acceleration is applied to the vehicle in a lateral direction.

2. The driving device according to claim 1, wherein: Also includes: a first gear, the first gear being immersed in the lubricating oil in the left lubricating oil storage tank and transmitting the driving force of the first motor to the left wheel; as well as The second gear is immersed in the lubricating oil in the right lubricating oil storage tank and transmits the driving force of the second motor to the right wheel.

3. The driving device according to claim 1 or 2, wherein: When acceleration is applied to the vehicle in both the lateral direction and the front-rear direction, the blocker blocks the through hole.

4. The driving device according to claim 1 or 2, wherein: The partition wall is arranged at the center in the lateral direction of the lubricating oil storage tank.

5. The driving device according to claim 1 or 2, wherein: The partition wall extends along the front-rear direction of the vehicle.

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