Oil inlet device of oil cooling motor cooling system

Abstract

An oil inlet device of an oil cooling motor cooling system comprises a speed reducer box body, an oil pump and a cooler, the downstream end of the oil pump is connected with an oil cooling motor through the cooler, the upstream end of the oil pump is connected with a filter, an oil inlet of the filter is connected with a hose, and a gravity ball is fixedly connected to the inlet end of the hose. The gravity ball is provided with an oil suction port communicated with the hose, the gravity ball is arranged in an engine oil pool at the bottom of the speed reducer box body, and the length of the hose is larger than the distance from the filter to the bottom of the engine oil pool, so that the gravity ball moves to the position which is always submerged by engine oil in the engine oil pool and is used for sucking the engine oil.

Description

Technical Field

[0001] The invention relates to the field of oil-cooled motors, and in particular to an oil inlet device of a cooling system of an oil-cooled motor. Background Art

[0002] The bottom of the reducer case of electric vehicles usually stores engine oil, which is mainly used to achieve two functions: one is to provide lubrication for the reduction gear set in the reducer; the other is to serve as a cooling medium. The engine oil is sucked out from the oil pool at the bottom of the reducer case, and after passing through the filter, oil pump, and cooler in sequence, the engine oil is transported to the oil-cooled motor to provide cooling oil for the oil-cooled motor cooling system.

[0003] like Figure 3 As shown, in the prior art, the filter 2 is usually arranged in the reducer housing 1, and its oil inlet is immersed below the liquid level of the oil pool 5 at the bottom of the housing. However, when the vehicle is driving on complex road conditions, the vehicle tilts, and the oil flows in the reducer housing 1 due to gravity and inertia, causing the oil inlet of the filter 2 to be exposed above the liquid level of the oil pool 5. At this time, air may be sucked into the filter 2, causing the oil-cooled motor cooling system to fail and unable to continuously provide cooling for the motor, which may trigger the motor's power reduction protection and even cause the motor to overheat and damage; to avoid air inhalation into the filter, a possible solution is to increase the amount of oil in the reducer housing. However, this method will bring many problems: on the one hand, increasing the amount of oil will significantly increase the cost; on the other hand, too much oil will cause greater resistance to the operation of the gear set 8 in the reducer, affecting the vehicle's endurance. In addition, the excessive amount of oil stirred by the reduction gear set causes the oil temperature to rise, affecting the cooling effect of the motor. Summary of the invention

[0004] The purpose of the present invention is to provide an oil inlet device for an oil-cooled motor cooling system in view of the corresponding deficiencies of the prior art. The device is provided with a hose at the oil suction port of the filter, a gravity ball is connected to the end of the hose, and the gravity ball is placed in the oil pool at the bottom of the reducer box, so that the gravity ball adjusts its own position under the action of gravity, ensuring that the oil inlet hole of the gravity ball is always located below the oil level, thereby effectively avoiding the inhalation of air.

[0005] The objective of the present invention is achieved by adopting the following scheme: An oil inlet device of an oil-cooled motor cooling system comprises a reducer housing, an oil pump and a cooler, wherein the downstream end of the oil pump is connected to the oil-cooled motor via the cooler, and the upstream end of the oil pump is connected to a filter, the oil inlet of the filter is connected to a hose, and a gravity ball is fixedly connected to the inlet end of the hose, the gravity ball is provided with an oil suction port connected to the hose, and the gravity ball is placed in an oil pool at the bottom of the reducer housing, and the length of the hose is greater than the distance from the filter to the bottom of the oil pool, so that the gravity ball moves in the oil pool to a position always submerged in the oil for sucking the oil.

[0006] The filter is mounted on a mounting bracket provided on the inner wall of the reducer casing.

[0007] The filter is arranged above the oil pool at the bottom of the reducer housing.

[0008] The filter is installed outside the reducer housing.

[0009] The hose connected to the oil suction port of the filter passes through a through hole provided on the reducer housing and extends into the interior of the reducer housing.

[0010] The hose is sleeved with a sleeve for sealing, the sleeve is clamped in the through hole of the reducer housing, and the outer diameter of the sleeve is larger than the diameter of the through hole.

[0011] The hose is made of rubber material.

[0012] The number of the oil inlet holes opened on the gravity ball is one or more.

[0013] Beneficial effects of the present invention: By setting a gravity ball at the end of the hose, ensuring that the oil inlet hole of the gravity ball is always below the oil level, the filter can be effectively prevented from inhaling air, ensuring that the oil-cooled motor cooling system continues to supply oil under complex road conditions and avoiding cooling interruptions, thereby ensuring the normal operation of the motor, greatly improving the stability of the motor cooling system, and reducing the risk of motor overheating and damage.

[0014] The present invention does not need to increase the amount of engine oil to avoid the problem of air inhalation, thereby reducing the cost of engine oil use. At the same time, it avoids the problem of increased running resistance of the reduction gear set and reduced cruising range due to excessive engine oil.

[0015] The gravity ball can automatically adjust the oil suction position as the oil level changes, adapting to the operation of the vehicle under various complex working conditions (such as sharp turns, uphill and downhill, and rough roads), ensuring the normal operation of the oil cooling system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the first embodiment of the present invention; Figure 2is a schematic structural diagram of a second embodiment of the present invention; Figure 3 It is a structural schematic diagram of the prior art; Figure 4 It is a schematic structural diagram of the first embodiment of the present invention when the vehicle is in a tilted state. DETAILED DESCRIPTION

[0017] like Figure 1 to Figure 2 As shown, an oil inlet device of an oil-cooled motor cooling system includes a reducer housing 1, an oil pump 6, and a cooler 9. The downstream end of the oil pump 6 is connected to the oil-cooled motor through the cooler 9, and the upstream end of the oil pump 6 is connected to the filter 2. The oil inlet of the filter 2 is connected to a hose 3. The hose 3 should have a certain flexibility, but should not be too soft to avoid excessive bending of the hose 3. The hose 3 is made of rubber material, and a gravity ball 4 is fixedly connected to the inlet end of the hose 3. The gravity ball 4 is provided with an oil suction port 10 connected to the hose 3. The number of oil inlet holes opened on the gravity ball 4 is one or more. The gravity ball 4 is placed in the oil pool 5 at the bottom of the reducer housing 1. The length of the hose 3 is greater than the distance from the filter 2 to the bottom of the oil pool 5. Figure 4 As shown, the gravity ball 4 is moved in the oil pool 5 to a position where it is always submerged in the oil for sucking the oil, but the length of the hose 3 should not be too long to avoid interfering with the operation of the gear set 8.

[0018] Embodiment 1: The filter 2 is mounted on a mounting bracket 11 provided on the inner wall of the reducer housing 1 , and the mounting bracket 11 fixes the filter 2 above the oil pool 5 at the bottom of the reducer housing 1 .

[0019] Embodiment 2: The filter 2 is installed on the outside of the reducer case 1, and the hose 3 connected to the oil suction port of the filter 2 passes through the through hole opened on the reducer case 1 and extends into the interior of the reducer case 1. The hose 3 is sleeved with a sleeve 7 for sealing, and the sleeve 7 is clamped in the through hole of the reducer case 1. The outer diameter of the sleeve 7 is larger than the diameter of the through hole, and it is made of softer rubber material to play a sealing role.

[0020] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modification made to the present invention by those skilled in the art without departing from the spirit of the present invention shall fall within the protection scope of the present invention.

Claims

1. An oil inlet device for an oil-cooled motor cooling system, comprising a reducer housing (1), an oil pump (6), and a cooler (9), characterized in that: The downstream end of the oil pump (6) is connected to the oil-cooled motor via a cooler (9), and the upstream end of the oil pump (6) is connected to the filter (2). The oil inlet of the filter (2) is connected to a hose (3). A gravity ball (4) is fixedly connected to the inlet end of the hose (3). The gravity ball (4) is provided with an oil suction port (10) connected to the hose (3). The gravity ball (4) is placed in the oil pool (5) at the bottom of the reducer housing (1). The length of the hose (3) is greater than the distance from the filter (2) to the bottom of the oil pool (5), so that the gravity ball (4) moves to a position in the oil pool (5) where it is always submerged in the oil, so as to suck the oil.

2. The oil inlet device of the oil-cooled motor cooling system according to claim 1, characterized in that: The filter (2) is mounted on a mounting bracket (11) provided on the inner wall of the reducer housing (1).

3. The oil inlet device of the oil-cooled motor cooling system according to claim 2, characterized in that: The filter (2) is arranged above the oil pool (5) at the bottom of the reducer housing (1).

4. The oil inlet device of the oil-cooled motor cooling system according to claim 1, characterized in that: The filter (2) is installed outside the reducer housing (1).

5. The oil inlet device of the oil-cooled motor cooling system according to claim 4, characterized in that: The hose (3) connected to the oil suction port of the filter (2) passes through a through hole provided on the reducer housing (1) and extends into the interior of the reducer housing (1).

6. The oil inlet device of the oil-cooled motor cooling system according to claim 5, characterized in that: The hose (3) is sleeved with a sleeve (7) for sealing, the sleeve (7) is clamped in a through hole of the reducer housing (1), and the outer diameter of the sleeve (7) is greater than the diameter of the through hole.

7. The oil inlet device of the oil-cooled motor cooling system according to claim 1, characterized in that: The hose (3) is made of rubber material.

8. The oil inlet device of the oil-cooled motor cooling system according to claim 1, characterized in that: The gravity ball (4) has one or more oil inlet holes formed on its body.

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