A pre-oil pump for a direct current brushless motor

Abstract

The utility model relates to the technical field of engine electric pre oil supply pump, especially to a direct current brushless engine pre oil supply pump. Include: brushless motor, external gearing gear pump and sealed adjusting assembly, the brushless motor and external gearing gear pump constitute the spline connection, sealed adjusting assembly sets up at the junction of brushless motor and external gearing gear pump, is used for sealing to junction, and automatic adjusting external gearing gear pump oil outlet pressure. The pre oil supply pump solves the problem of motor overheating through using direct current brushless motor, and sets up sealed adjusting assembly to seal and adjust the junction of direct current brushless motor and external gearing gear pump, solves the problem of pre oil supply pump sealing failure.

Description

Technical Field

[0001] This utility model relates to the field of electric pre-fuel pump technology for engines, and in particular to a DC brushless engine pre-fuel pump. Background Technology

[0002] Traditional electric pre-lubrication pumps for engines primarily use a DC brushed motor to drive an external gear pump to lubricate the engine. Before the engine starts, the pre-lubrication pump contactor is energized and engages, the motor starts, and the pre-lubrication pump pumps oil to the engine, ensuring sufficient lubrication between the internal friction pairs before the engine starts. Because traditional engine pre-lubrication pumps use brushed motors, they have high starting currents and lack overload thermal protection, making them prone to motor burnout. Furthermore, the engine maintains a certain pressure during operation, making traditional pre-lubrication pumps susceptible to seal failure and oil leakage. Therefore, a solution is urgently needed.

[0003] The above content is only used to help understand the technical solution of this utility model, and does not represent an admission that the above content is the closest prior art. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a DC brushless engine pre-supply pump. This pre-supply pump solves the problem of motor overheating by using a DC brushless motor. At the same time, a sealing adjustment component is set to adjust the seal at the connection between the DC brushless motor and the external gear pump, thus solving the problem of pre-supply pump seal failure.

[0005] To achieve the aforementioned objective, the technical solution of this utility model is as follows: a DC brushless engine pre-supply pump includes: a brushless motor, an external gear pump, and a sealing adjustment assembly; the brushless motor and the external gear pump are connected by a spline; the sealing adjustment assembly is disposed at the connection between the brushless motor and the external gear pump, for sealing the connection and automatically adjusting the pressure at the oil outlet of the external gear pump.

[0006] Preferably, the sealing adjustment assembly includes a transition front cover, a sealing part, and an adjustment part; one side of the transition front cover is connected to a brushless motor, and the other side is connected to an external gear pump, and the transition front cover covers the outside of the drive gear shaft diameter of the external gear pump; the sealing part is fitted onto the drive gear shaft diameter to seal the gap between the drive gear shaft diameter and the transition front cover; the adjustment part is installed on the transition front cover, one end of the adjustment part is connected to the oil outlet chamber of the external gear pump, and the other end is connected to the oil inlet chamber of the external gear pump.

[0007] Preferably, the sealing part includes a skeleton oil seal; there are two skeleton oil seals, and both skeleton oil seals are fitted on the shaft diameter of the drive gear.

[0008] Preferably, the regulating part includes an overflow valve and a connecting pipe; the overflow valve is installed on the side of the transition front cover, one end of the overflow valve is connected to the oil outlet of the external gear pump; the other end of the overflow valve is connected to one end of the connecting pipe; the other end of the connecting pipe is connected to the oil inlet chamber of the external gear pump.

[0009] Preferably, it also includes a mounting base; the top of the mounting base is connected to the bottom of the transition front cover.

[0010] Preferably, it also includes a quick-connect connector; one end of the quick-connect connector is electrically connected to the brushless motor, and the other end is electrically connected to the control power supply.

[0011] Preferably, the brushless motor is a DC brushless motor, and the brushless motor is equipped with a temperature switch and a controller; the controller is used to start the brushless motor and adjust the speed of the brushless motor; the temperature switch cuts off the power supply to the brushless motor according to the set protection temperature.

[0012] Preferably, the external gear pump includes a rear cover, a pump body, a driving gear, and a driven gear; one side of the driving gear is connected to the driving gear shaft diameter, and the other side is connected to the driven gear; the pump body is disposed outside the driving gear; the rear cover is disposed outside the driven gear, and a bushing for sealing is provided between the rear cover and the driven gear; one side of the pump body is connected to the transition front cover, and the other side is connected to the rear cover, and a sealing element is provided at each connection.

[0013] Preferably, the seals and bushings on both sides of the pump body are made of perfluororubber.

[0014] Preferably, the rear cover is provided with an oil inlet and an oil outlet.

[0015] The beneficial effects of this utility model are reflected in:

[0016] (1) Compared with traditional engine pre-supply pumps, the pre-supply pump provided by this utility model uses a DC brushless motor, which greatly reduces the starting current and rated current of the motor, thereby reducing motor heat generation, increasing the continuous operating time and safety factor of the motor, and reducing the noise and flow fluctuation of the pre-supply pump. At the same time, a sealing adjustment component is set to adjust the seal at the connection between the DC brushless motor and the external gear pump, reducing the risk of oil leakage in the engine under normal temperature and high temperature conditions.

[0017] (2) The pre-supply pump provided by this utility model can control the motor speed through an internal controller to regulate the flow rate of the pre-supply pump, making it more convenient to use and adjust. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a cross-sectional view of the structural parts of this utility model;

[0020] Figure 3 This is the left view of the present invention;

[0021] Figure 4 This is the right view of the present invention.

[0022] Explanation of reference numerals in the attached figures:

[0023] 10. Brushless motor; 11. Positive terminal; 12. Negative terminal; 20. Quick-connect connector; 30. External gear pump; 31. Oil inlet; 311. Oil outlet; 32. Transition front cover; 33. Rear cover; 34. Pump body; 35. Drive gear; 36. Driven gear; 37. Bushing; 38. Oil seal; 39. Drive gear shaft diameter. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0025] Example

[0026] See Figure 1-4 As shown: This utility model provides a DC brushless engine pre-supply pump, including: a brushless motor 10, an external gear pump 30, and a sealing adjustment assembly.

[0027] One side of the brushless motor 10 is connected to the external gear pump 30 via a spline; one end of the quick-connect connector 20 is electrically connected to the other side of the brushless motor 10, and the other end of the quick-connect connector 20 is electrically connected to the control power supply.

[0028] In addition, the brushless motor 10 is also provided with a positive terminal 11 and a negative terminal 12.

[0029] The brushless motor 10 is a DC brushless motor, and the brushless motor 10 is equipped with a temperature switch and a controller; the controller is used to start the brushless motor 10 and adjust the speed of the brushless motor 10.

[0030] The temperature switch cuts off the power supply to the brushless motor 10 according to the set protection temperature. When the temperature of the motor body reaches 85℃, the motor automatically cuts off the power supply due to temperature protection. The motor can start normally when the temperature drops to 65℃.

[0031] In practical use, the start switch, speed control switch, and forward / reverse switch of a brushless DC motor are integrated internally. Operators do not need a contactor to start the motor. By inputting a 24V electrical signal to the control power supply, the motor converts the 24V DC power into the AC power required by the brushless DC motor through its built-in controller. This starting process is a soft start, significantly reducing the instantaneous current during startup. Compared to brushed DC motors, brushless DC motors eliminate the carbon brush structure, thus preventing brush heat generation during high-speed operation and improving the continuous operation time and safety of the pre-supply pump. Furthermore, because brushless DC motors do not have brushes, the noise level is lower, with the noise generated by the motor itself controlled within 65-68 decibels.

[0032] The sealing adjustment component is located at the connection between the brushless motor 10 and the external gear pump 30 to seal the connection and automatically adjust the pressure at the oil outlet of the external gear pump 30.

[0033] The sealing adjustment assembly includes a transition front cover 32, a sealing part, and an adjustment part. One side of the transition front cover 32 is connected to the brushless motor 10, and the other side is connected to the external gear pump 30, with the transition front cover 32 covering the outside of the drive gear shaft diameter 39 of the external gear pump 30. The sealing part is fitted onto the drive gear shaft diameter 39 to seal the gap between the drive gear shaft diameter 39 and the transition front cover 32. The adjustment part is mounted on the transition front cover 32, with one end communicating with the oil outlet chamber of the external gear pump 30 and the other end communicating with the oil inlet chamber of the external gear pump 30.

[0034] The sealing part includes a skeleton oil seal 38; there are two skeleton oil seals 38, and both skeleton oil seals 38 are fitted on the drive gear shaft diameter 39.

[0035] The regulating unit includes an overflow valve 321 and a connecting pipe; the overflow valve 321 is installed on the side of the transition front cover 32, one end of the overflow valve 321 is connected to the oil outlet of the external gear pump 30; the other end of the overflow valve 321 is connected to one end of the connecting pipe; the other end of the connecting pipe is connected to the oil inlet chamber of the external gear pump 30.

[0036] It also includes a mounting base 40; the top of the mounting base 40 is connected to the bottom of the transition front cover 32.

[0037] The external gear pump 30 includes a rear cover 33, a pump body 34, a driving gear 35, and a driven gear 36. One side of the driving gear 35 is connected to the driving gear shaft 39, and the other side is connected to the driven gear 36. The pump body 34 is located outside the driving gear 35. The rear cover 33 is located outside the driven gear 36, and a sealing bushing 37 is provided between the rear cover 33 and the driven gear 36. One side of the pump body 34 is connected to the transition front cover 32, and the other side is connected to the rear cover 33, with seals provided at both connections. The rear cover 33 has an oil inlet 31 and an oil outlet 311. The seals and bushing 37 on both sides of the pump body 34 are made of perfluororubber.

[0038] This invention incorporates a double-skeletal oil seal 38 in the transition cover 32, with each seal capable of withstanding a pressure of up to 2 MPa, effectively preventing oil leakage caused by engine back pressure. Simultaneously, an adjustable overflow valve 321 is located on the side of the transition cover 32. When the outlet pressure of the external gear pump 30 overcomes the spring force, the overflow valve 321 opens, allowing high-pressure oil to flow back to the inlet chamber, thereby reducing system pressure and ensuring the engine's internal components are not affected by high pressure. Furthermore, many seals inside the external gear pump 30 are made of perfluororubber, ensuring that even after the engine has been running for a period of time and the lubricant temperature is too high (200°C), the pre-supply pump still maintains good sealing performance.

[0039] 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, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A pre-oil pump for a direct current brushless motor, characterized by, include: The brushless motor (10), the external gear pump (30), and the sealing adjustment assembly are provided. The brushless motor (10) and the external gear pump (30) are connected by a spline. The sealing adjustment assembly is provided at the connection between the brushless motor (10) and the external gear pump (30) to seal the connection and automatically adjust the pressure at the oil outlet of the external gear pump (30).

2. A pre-oiler pump for a brushless DC motor as claimed in claim 1, wherein The sealing adjustment assembly includes a transition front cover (32), a sealing part, and an adjustment part; one side of the transition front cover (32) is connected to the brushless motor (10), and the other side is connected to the external gear pump (30), and the transition front cover (32) covers the outside of the drive gear shaft diameter (39) of the external gear pump (30); the sealing part is fitted on the drive gear shaft diameter (39) to seal the gap between the drive gear shaft diameter (39) and the transition front cover (32); the adjustment part is installed on the transition front cover (32), one end of the adjustment part is connected to the oil outlet chamber of the external gear pump (30), and the other end is connected to the oil inlet chamber of the external gear pump (30).

3. A pre-oiler pump for a brushless DC motor as claimed in claim 2, wherein The sealing part includes a skeleton oil seal (38); there are two skeleton oil seals (38), and both skeleton oil seals (38) are fitted on the shaft diameter (39) of the drive gear.

4. A pre-oiler pump for a brushless DC motor as claimed in claim 3, wherein The regulating unit includes an overflow valve (321) and a connecting pipe; the overflow valve (321) is installed on the side of the transition front cover (32), one end of the overflow valve (321) is connected to the oil outlet of the external gear pump (30); the other end of the overflow valve (321) is connected to one end of the connecting pipe; the other end of the connecting pipe is connected to the oil inlet chamber of the external gear pump (30).

5. A pre-oiler pump for a brushless DC motor according to claim 2 or 3 or 4, wherein It also includes a mounting base (40); the top of the mounting base (40) is connected to the bottom of the transition front cover (32).

6. A pre-oiler pump for a brushless DC motor according to claim 2 or 3 or 4, wherein It also includes a quick-connect connector (20); one end of the quick-connect connector (20) is electrically connected to the brushless motor (10), and the other end is electrically connected to the control power supply.

7. A pre-oiler pump for a brushless DC motor as claimed in claim 6, wherein The brushless motor (10) is a DC brushless motor, and the brushless motor (10) is equipped with a temperature switch and a controller. The controller is used to start the brushless motor (10) and adjust the speed of the brushless motor (10). The temperature switch cuts off the power supply to the brushless motor (10) according to the set protection temperature.

8. A pre-oiler pump for a brushless DC motor as defined in claim 6, wherein The external gear pump (30) includes a rear cover (33), a pump body (34), a driving gear (35), and a driven gear (36); one side of the driving gear (35) is connected to the driving gear shaft diameter (39), and the other side is connected to the driven gear (36) for transmission; the pump body (34) is located outside the driving gear (35); the rear cover (33) is located outside the driven gear (36), and a bushing (37) for sealing is provided between the rear cover (33) and the driven gear (36); one side of the pump body (34) is connected to the transition front cover (32), and the other side is connected to the rear cover (33), and a sealing element is provided at each connection.

9. A pre-oiler pump for a brushless DC motor as claimed in claim 8, wherein The seals and bushings (37) on both sides of the pump body (34) are made of perfluororubber.

10. A pre-oiler pump for a brushless DC motor as defined in claim 8, wherein The rear cover (33) is provided with an oil inlet (31) and an oil outlet (311).

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