Oil inlet device of oil cooling motor cooling system
By using a gravity ball to adjust the position of the oil inlet in the oil-cooled motor cooling system, the problem of air intake under complex road conditions was solved, a stable oil supply to the cooling system was achieved, the risk of motor overheating and cost were reduced, and the driving range was improved.
Patent Information
- Application Number
- CN202520167686.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-24
- Publication Date
- 2026-01-02
- Estimated Expiration
- 2035-01-24
AI Technical Summary
Existing oil-cooled motor cooling systems are prone to air intake under complex road conditions, leading to cooling system failure, which may trigger motor power reduction protection or overheating damage. Increasing the amount of oil will increase costs and affect range.
A flexible hose is installed at the oil inlet of the filter, and a gravity ball is connected to its end. The gravity ball is placed in the oil sump to ensure that the oil inlet is always below the oil surface. The position is automatically adjusted by gravity to prevent air from being sucked in.
It effectively prevents air intake, ensures continuous oil supply to the cooling system, improves system stability, reduces the risk of motor overheating, reduces oil costs, and does not affect range.
Smart Images
Figure CN223754601U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of oil-cooled motors, and specifically to an oil inlet device for an oil-cooled motor cooling system. Background Technology
[0002] The gearbox of an electric vehicle typically stores engine oil. The engine oil serves two main functions: first, to lubricate the reduction gear set inside the gearbox; and second, to act as a cooling medium. The engine oil is drawn from the oil sump at the bottom of the gearbox and passes through a filter, oil pump, and cooler before being delivered 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 installed inside the gearbox housing 1, with its oil inlet submerged below the oil level in the oil sump 5 at the bottom of the housing. However, when the vehicle is driving under complex road conditions, it tilts, and the oil flows within the gearbox housing 1 due to gravity and inertia. This causes the oil inlet of the filter 2 to be exposed above the oil level in the oil sump 5. At this time, air may be drawn into the filter 2, causing the oil-cooled motor cooling system to fail, unable to continuously cool the motor, which may trigger the motor's power reduction protection, or even cause the motor to overheat and be damaged. To avoid air being drawn into the filter, one possible solution is to increase the amount of oil in the gearbox housing. However, this approach has several problems: firstly, increasing the amount of oil will significantly increase costs; secondly, excessive oil will create greater resistance to the operation of the gear set 8 inside the gearbox, affecting the vehicle's range. In addition, the excessive oil agitation by the reduction gear set will cause the oil temperature to rise, affecting the motor's cooling effect. Summary of the Invention
[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing an oil inlet device for an oil-cooled motor cooling system. This device has a flexible hose installed at the oil inlet of the filter, with a gravity ball connected to the end of the hose. The gravity ball is placed in the oil sump at the bottom of the gearbox, allowing it to adjust its position under gravity. This ensures that the oil inlet of the gravity ball is always below the oil level, effectively preventing air from being drawn in.
[0005] The objective of this utility model is achieved through the following solution:
[0006] An oil inlet device of an oil-cooled motor cooling system, comprising a reducer box, an oil pump and a cooler, the downstream end of the oil pump is connected to the oil-cooled motor through the cooler, the upstream end of the oil pump is connected to a filter, the oil inlet of the filter is connected to a hose, a gravity ball is fixedly connected to the inlet end of the hose, the gravity ball is provided with an oil suction port in communication with the hose, the gravity ball is placed in an oil pool at the bottom of the reducer box, 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 to a position always submerged in oil in the oil pool for sucking oil.
[0007] The filter is mounted on a mounting bracket provided on the inner wall of the reducer box.
[0008] The filter is arranged above the oil pool at the bottom of the reducer box.
[0009] The filter is mounted on the outside of the reducer box.
[0010] The hose connected to the oil suction port of the filter penetrates through a through hole formed on the reducer box and extends into the interior of the reducer box.
[0011] A sleeve for sealing is arranged on the hose, the sleeve is clamped in the through hole of the reducer box, and the outer diameter of the sleeve is greater than the diameter of the through hole.
[0012] The hose is made of rubber.
[0013] One or more oil inlet holes are formed in the gravity ball.
[0014] The utility model discloses the beneficial effects of:
[0015] By setting the gravity ball at the end of the hose, it is ensured that the oil inlet hole of the gravity ball is always below the oil level, effectively avoiding the filter from sucking air, ensuring the continuous oil supply of the oil-cooled motor cooling system under complex road conditions, avoiding the interruption of cooling, thereby ensuring the normal operation of the motor, greatly improving the stability of the motor cooling system and reducing the risk of overheating damage of the motor.
[0016] The utility model discloses the beneficial effects of:
[0017] The gravity ball can automatically adjust the oil suction position with the change of the position of the oil level, adapt to the operation of the vehicle under various complex working conditions (such as sharp turning, uphill and downhill, rugged road) and ensure the normal operation of the oil-cooled system. BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1 It is the structure schematic view of the first embodiment of the utility model;
[0019] Figure 2 This is a schematic diagram of the structure of the second embodiment of the present utility model;
[0020] Figure 3 This is a schematic diagram of the existing technology;
[0021] Figure 4 This is a structural schematic diagram of the first embodiment of the present invention when the vehicle is tilted. Detailed Implementation
[0022] like Figures 1 to 2 As shown, an oil inlet device for 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 via the cooler 9, and the upstream end of the oil pump 6 is connected to a filter 2. A flexible hose 3 is connected to the oil inlet of the filter 2. The hose 3 should have a certain degree of flexibility, but not be too soft to avoid excessive bending. The hose 3 is made of rubber. A gravity ball 4 is fixedly connected to the inlet end of the hose 3. The gravity ball 4 has an oil suction port 10 communicating with the hose 3. The gravity ball 4 has one or more oil inlet holes. The gravity ball 4 is placed in an oil sump 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 sump 5. Figure 4 As shown, the gravity ball 4 is moved in the oil sump 5 to a position where it is always submerged in oil, for the purpose of absorbing oil. However, the length of the hose 3 should not be too long, so as not to interfere with the operation of the gear set 8.
[0023] Example 1: The filter 2 is installed on the mounting bracket 11 provided on the inner wall of the reducer housing 1. The mounting bracket 11 fixes the filter 2 above the oil sump 5 at the bottom of the reducer housing 1.
[0024] Example 2: The filter 2 is installed outside the reducer housing 1. The hose 3 connected to the oil suction port of the filter 2 passes through the through hole opened on the reducer housing 1 and extends into the interior of the reducer housing 1. A sleeve 7 for sealing is fitted on the hose 3. The sleeve 7 is locked in the through hole of the reducer housing 1. The outer diameter of the sleeve 7 is larger than the diameter of the through hole and is made of a relatively soft rubber material to play a sealing role.
[0025] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications made to the present utility model by those skilled in the art without departing from the spirit of the present utility model shall fall within the protection scope of the present utility model.
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 an oil-cooled motor via a cooler (9), and the upstream end of the oil pump (6) is connected to a filter (2). The oil inlet of the filter (2) is connected to a hose (3), and a gravity ball (4) is fixedly connected to the inlet end of the hose (3). The gravity ball (4) has an oil suction port (10) that communicates with the hose (3). The gravity ball (4) is placed in the oil sump (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 sump (5), so that the gravity ball (4) moves in the oil sump (5) to a position that is always submerged in oil, for the purpose of sucking up oil.
2. The oil inlet device of the oil-cooled motor cooling system as described in claim 1, characterized in that: The filter (2) is installed on the 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 as described in claim 2, characterized in that: The filter (2) is located above the oil sump (5) at the bottom of the reducer housing (1).
4. The oil inlet device of the oil-cooled motor cooling system as described in 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 as described in claim 4, characterized in that: The hose (3) connected to the oil inlet of the filter (2) passes through the through hole opened 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 as described in claim 5, characterized in that: The hose (3) is fitted with a sleeve (7) for sealing. The sleeve (7) is fitted into the through hole of the reducer housing (1). The outer diameter of the sleeve (7) is larger than the diameter of the through hole.
7. The oil inlet device of the oil-cooled motor cooling system as described in claim 1, characterized in that: The hose (3) is made of rubber.
8. The oil inlet device of the oil-cooled motor cooling system as described in claim 1, characterized in that: The number of oil inlet holes opened on the gravity ball (4) is one or more.