All-in-one common shell lubricating device

Abstract

The utility model discloses an all-in-one common-shell lubricating device which comprises a motor, a speed reducer, an oil return cavity and an oil suction port, one end of the oil return cavity is located at the lowest position of the rear end of the motor, the other end of the oil return cavity is located at the lowest position of a cavity of the speed reducer, the oil suction port is formed in the oil return cavity, and an oil filter is arranged on a motor shell. The oil filter is arranged on the motor shell, an oil inlet of the oil filter is connected with the oil suction port, the oil pump is arranged on the motor shell, an oil inlet of the oil pump is connected with an oil outlet of the oil filter, and the oil pump and the oil filter are coaxially arranged; according to the all-in-one common-shell lubricating device, the problems that in the prior art, due to the height difference, most oil flows to the side of a motor, oil return of a whole oil return system becomes difficult, the air suction condition is likely to occur in the continuous working process of an oil pump, and when a whole vehicle works at the low temperature of the oil, the whole vehicle cannot work easily are solved. And an oil filter and a heat exchanger are possibly blocked due to high oil viscosity, so that the problem of failure of a lubricating system is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of automation equipment, in particular to an all-in-one common shell lubrication device. Background Art

[0002] An oil-cooled motor is a device that uses an oil cooling system to cool the motor. Its working mechanism is mainly to transfer the heat inside the motor to the outside for heat dissipation through the circulation of oil, so as to protect the motor and extend its service life.

[0003] In the prior art, the oil pump, oil filter and heat exchanger are arranged far apart, the oil pump outlet is connected to the oil pipe, and then connected to the heat exchanger. A longer oil pipe accessory is added, which increases the length of the entire oil circuit, increases the flow resistance of the oil channel, and reduces the efficiency of the oil pump. In addition, the added oil pipe parts cause the cost of the entire project to be too high. The oil pipe and the oil baffle are integrated together, which is difficult to manufacture and has a high cost. The overall assembly difficulty is large, which increases the assembly process cost of the production line. Although the oil suction port is arranged at the lowest point in the reducer side cavity, an oil baffle is required to avoid bubbles caused by gear stirring oil and suction and cavitation caused by unstable oil level. In addition, the whole vehicle will tilt left and right during driving on the road. When the reducer side is higher than the motor side, due to the height difference, most of the oil will flow to the motor side, making it difficult to return the oil in the entire oil return system. It is easy to suck air during the continuous operation of the oil pump. When the whole vehicle works at a low oil temperature, the oil filter and heat exchanger may be blocked due to the high viscosity of the oil, resulting in lubrication system failure. Utility Model Content

[0004] The purpose of the utility model is to provide an all-in-one common shell lubrication device to solve the problems of the prior art, such as high manufacturing difficulty and high cost, difficulty in returning oil from the entire oil return system, and the possibility of blockage of the oil filter and heat exchanger due to high oil viscosity, resulting in failure of the lubrication system.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an all-in-one common housing lubrication device, including a motor side housing and a reducer side housing, and also including:

[0006] An oil return chamber, one end of which is located at the lowest point of the rear end of the motor-side housing, and the other end of which is located at the lowest point of the chamber of the reducer-side housing;

[0007] An oil suction port is arranged inside the oil return chamber, an oil filter is arranged on the motor side housing, an oil filter inlet of the oil filter is connected to the oil suction port, and

[0008] An oil pump is arranged on the motor side housing, an oil pump inlet of the oil pump is connected to an oil filter outlet of the oil filter, and the oil pump and the oil filter are coaxially arranged.

[0009] Preferably, a heat exchanger is installed on the motor side housing.

[0010] Preferably, a cooling oil circuit and an oil outlet oil circuit are also cast on the motor side housing.

[0011] Preferably, the oil outlet of the oil pump is connected to the oil inlet of the heat exchanger on the heat exchanger through a cooling oil circuit.

[0012] Preferably, the heat exchanger oil outlet on the heat exchanger is connected to the oil outlet oil circuit.

[0013] Preferably, the cross-section of the oil return chamber at the rear end of the motor-side housing is smaller than the cross-section of the oil return chamber at the reducer-side housing.

[0014] Preferably, the oil return chamber is connected to the motor side housing and the reducer side housing through a stepped arc transition.

[0015] Preferably, the oil suction port is located at the lowest point of the oil return chamber.

[0016] Preferably, a bypass oil circuit is cast on the motor side housing before the cooling oil circuit and the oil outlet oil circuit, and a bypass valve is installed on the bypass oil circuit.

[0017] Preferably, the oil passage of the reducer side housing is connected to an input shaft oil pipe.

[0018] It can be seen from the above technical solution that the utility model has the following beneficial effects:

[0019] The all-in-one common housing lubrication device has a coaxial arrangement of the oil pump and the oil filter, and the heat exchanger is adjacent to the oil pump, which can shorten the pipeline connection part and the flow resistance of the bend. One end of the oil return chamber is located at the lowest point of the rear end of the motor, and the other end is located at the lowest point of the reducer chamber, and the oil suction port is arranged inside. The cross-section of the oil return chamber at the rear end of the motor is smaller than that on the reducer side, and a stepped arc transition connection is used to ensure that when the oil filling amount is constant, the oil level can be higher than the oil suction hole under various working conditions, while reducing the disturbance of the return oil and gear oil stirring in the lubrication system, and reducing the total oil filling amount as much as possible, reducing the overall lubrication oil path length of the oil-cooled electric drive, eliminating some components, reducing the oil path flow resistance and the oil stirring loss of the electric drive. , reduce product costs, solve the problems of low efficiency of the existing oil pump and many oil pipe accessories, which lead to an increase in the length of the entire oil circuit, an increase in the flow resistance of the oil channel, and a decrease in the efficiency of the oil pump. The added oil pipe parts lead to the problem of excessively high cost of the entire project, and an oil baffle is added to avoid bubbles caused by gear stirring oil and air suction and cavitation caused by unstable oil level. Due to the height difference, most of the oil will flow to the motor side, making it difficult for the entire oil return system to return oil. Air suction is prone to occur during the continuous operation of the oil pump. When the vehicle works at low oil temperatures, the oil filter and heat exchanger may be blocked due to high oil viscosity, resulting in failure of the lubrication system. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a cross-sectional view of a certain angle of the overall mechanism of the utility model;

[0021] Figure 2 It is a diagram of the internal structure of the overall structure of the utility model at a certain angle;

[0022] Figure 3 This is another internal structural diagram of the overall structure of the utility model;

[0023] Figure 4 This is a cross-sectional view from another angle of the present invention;

[0024] Figure 5 It is a schematic diagram of the working process of the utility model.

[0025] In the figure: 1. Motor side housing; 2. Reducer side housing; 3. Oil return chamber; 4. Oil suction port; 5. Oil filter; 6. Oil pump; 7. Heat exchanger; 8. Cooling oil circuit; 9. Oil outlet circuit; 10. Bypass oil circuit; 11. Bypass valve; 12. Input shaft oil pipe; 13. Main oil pipe; 14. Oil return port at the rear end of the motor; 15. Oil return port at the front end of the motor; 16. Oil return port at the reducer side; 17. Oil filter inlet; 18. Oil pump outlet; 19. Heat exchanger oil inlet; 20. Heat exchanger oil outlet; 21. Oil filter outlet; 22. Oil pump inlet. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] like Figure 1-Figure 4As shown, an all-in-one common housing lubrication device includes a motor side housing 1, a reducer side housing 2, an oil return chamber 3, an oil suction port 4, an oil filter 5, an oil pump 6, an oil filter oil inlet 17, an oil filter oil outlet 21 and an oil pump oil outlet 22. One end of the oil return chamber 3 is located at the lowest point of the rear end of the motor side housing 1, and the other end of the oil return chamber 3 is located at the lowest point of the cavity of the reducer side housing 2. The oil suction port 4 is arranged inside the oil return chamber 3. The motor side housing 1 is provided with an oil filter 5. The oil filter oil inlet 17 of the oil filter 5 is connected to the oil suction port 4. The oil pump 6 is arranged on the motor side housing 1. The oil pump oil inlet 22 of the oil pump 6 is connected to the oil filter 5. The oil pump 6 is coaxially arranged with the oil filter 5, and the heat exchanger 7 is adjacent to the oil pump 6, which can shorten the pipeline connection part and the bend flow resistance. The device ensures that when the refueling amount is constant, the oil level can be higher than the oil suction hole under various working conditions, while reducing the disturbance of oil return and gear oil stirring in lubrication, and reducing the total refueling amount as much as possible. In this way, no matter the vehicle tilts left or right or forward and backward during the forward movement, the whole device will be in a good state of oil suction, lubrication and oil return, and the oil pump 6 will not be empty. The overall lubrication oil path length of the oil-cooled electric drive is reduced, some components are eliminated, the oil path flow resistance and the oil stirring loss of the electric drive are reduced, and the product cost is reduced.

[0028] like Figure 1-Figure 5 As shown, a heat exchanger 7 is installed on the motor side housing 1, and a cooling oil circuit 8 and an oil outlet circuit 9 are also cast on the motor side housing 1. The oil pump outlet 21 is connected to the heat exchanger oil inlet 19 on the heat exchanger 7 through the cooling oil circuit 8, and the heat exchanger oil outlet 20 on the heat exchanger 7 is connected to the oil outlet circuit 9. The cross-section of the oil return chamber 3 located at the rear end of the motor side housing 1 is smaller than the cross-section of the oil return chamber 3 located on the reducer side housing 2. The oil return chamber 3 is connected to the motor side housing 1 and the reducer housing 2 through a stepped arc transition. The oil suction port 4 is located at the lowest point of the oil return chamber 3. A bypass oil circuit 10 is also cast on the motor side housing 1 before the cooling oil circuit 8 and the oil outlet circuit 9. A bypass valve 11 is installed on the bypass oil circuit 10. The bypass valve 11 is in a one-way normally closed state. When the system oil temperature is low, the oil will flow into the oil return chamber 3 due to viscosity. When the flow resistance of the oil filter 5 and the heat exchanger 7 increases or even gets blocked, when the pressure in the oil circuit reaches the set value of the bypass valve 11, the bypass valve 11 opens, and can bypass the heat exchanger 7 and directly distribute the lubricating oil to various areas that need lubrication and cooling through the oil outlet oil circuit 9 of the motor 1 housing, thereby solving the safety problem caused by the blockage of the oil filter 5 and the heat exchanger 7 due to the high viscosity of the oil when the oil works at a low temperature, and solving the safety problem caused by the blockage of the oil filter 5 and the heat exchanger 7 due to the high viscosity of the oil when the oil works at a low temperature, and the oil in the lubrication system does not run smoothly. The oil channel of the reducer 2 side housing is connected to the input shaft oil pipe 12, and the lubricating oil circuit is cast on the common housing, the oil baffle is cancelled and one oil filter 5 component is reduced. The scheme is an oil filter 5, which reduces the cost of the entire scheme.

[0029] When the lubricating device is in operation, the oil in the motor housing 1 is affected by gravity and flows into the oil return chamber 3 through the motor front end oil return port 15 and the motor rear end oil return port 14. The oil in the reducer housing 2 is affected by gravity and flows into the oil return chamber 3 through the reducer side oil return port 16. The oil in the oil return chamber 3 flows to the oil suction port 4. Since the oil suction port 4 is connected to the oil filter inlet 17, and the oil filter outlet 21 is connected to the oil pump inlet 17, the oil is sucked into the oil pump 6, and flows to the heat exchanger 7 through the oil pump outlet 18 and the cooling oil circuit. The oil is cooled in the heat exchanger 7. Then the oil flows to the motor side housing 1 and the main oil pipe 13 through the oil outlet passage 9. The oil flowing to the motor side housing 1 mainly lubricates the motor stator. The oil flowing to the main oil pipe 13 is divided into two parts, one part lubricates the differential bearing and the differential, and the other part flows into the oil channel of the reducer side housing 2. The oil channel of the reducer side housing 2 is connected to the input shaft oil pipe 12, and the oil is introduced into the motor rotor to achieve lubrication of the motor rotor. Finally, the oil falls back into the reducer side housing 2 cavity and the motor side housing 1 cavity, and then realizes the overall lubrication solution through the oil return ports on both sides.

[0030] When the system oil temperature is low, the oil has high viscosity, the flow resistance of the oil filter and the heat exchanger increases or even becomes blocked, and the pressure in the oil circuit reaches the set value of the bypass valve 11. The bypass valve 11 opens, bypassing the heat exchanger 7 and directly distributing the lubricating oil to various areas requiring lubrication and cooling through the oil outlet passage 9 of the motor side housing 1.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An all-in-one common housing lubrication device, comprising a motor side housing (1) and a reducer side housing (2), characterized in that: Also includes: An oil return chamber (3), one end of which is located at the lowest point of the rear end of the motor side housing (1), and the other end of which is located at the lowest point of the chamber of the reducer side housing (2); An oil suction port (4) is arranged inside the oil return chamber (3); an oil filter (5) is arranged on the motor side housing (1); an oil filter inlet (17) of the oil filter (5) is connected to the oil suction port (4); and An oil pump (6) is arranged on the motor side housing (1), an oil pump inlet (22) of the oil pump (6) is connected to an oil filter outlet (21) of the oil filter (5), and the oil pump (6) and the oil filter (5) are coaxially arranged.

2. The all-in-one common housing lubrication device according to claim 1, characterized in that: A heat exchanger (7) is installed on the motor side housing (1).

3. The all-in-one common housing lubrication device according to claim 2, characterized in that: A cooling oil circuit (8) and an oil outlet circuit (9) are also cast on the motor side housing (1).

4. The all-in-one common housing lubrication device according to claim 3, characterized in that: The oil filter oil outlet (21) is connected to the heat exchanger oil inlet (19) on the heat exchanger (7) through a cooling oil circuit (8).

5. The all-in-one common housing lubrication device according to claim 3, characterized in that: The heat exchanger oil outlet (20) on the heat exchanger (7) is connected to the oil outlet oil circuit (9).

6. The all-in-one common housing lubrication device according to claim 1, characterized in that: The cross section of the oil return chamber (3) located at the rear end of the motor side housing (1) is smaller than the cross section of the oil return chamber (3) located on the reducer side housing (2).

7. The all-in-one common housing lubrication device according to claim 1, characterized in that: The oil return chamber (3) is connected to the motor side housing (1) and the reducer side housing (2) through a stepped arc transition.

8. The all-in-one common housing lubrication device according to claim 1, characterized in that: The oil suction port (4) is located at the lowest point of the oil return chamber (3).

9. The all-in-one common housing lubrication device according to claim 3, characterized in that: A bypass oil circuit (10) is cast on the motor side housing (1) before the cooling oil circuit (8) and the oil outlet oil circuit (9), and a bypass valve (11) is installed on the bypass oil circuit (10).

10. The all-in-one common housing lubrication device according to claim 1, characterized in that: The oil passage of the reducer side housing (2) is connected to an input shaft oil pipe (12).

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