Electric oil pump integrated with control unit

Abstract

The electric oil pump integrated with the control unit comprises a motor assembly and a base assembly, the motor assembly is fixedly connected to the base assembly, the motor assembly comprises a motor, a starting control unit module and a connector, a containing space is arranged in the motor, the starting control unit module and the connector are arranged in the containing space, and the motor assembly is fixedly connected to the base assembly. The starting control unit module is electrically connected with the motor and the connector assembly, the connector assembly is connected with an external switch through an external wire harness, the base assembly comprises a base body and a multi-plunger pump core assembly, the multi-plunger pump core assembly is arranged in the base body, the motor is fixedly connected with the base body, and the motor is fixedly connected with the base body. An output shaft of the motor extends into the base body to be matched with the multi-plunger pump core assembly, an oil inlet and an oil outlet which are matched with the multi-plunger pump core assembly are formed in the base body, the starting control unit module and the connector are arranged in the containing space, the waterproof and dustproof capacity is improved, the use of wire harnesses is reduced, and the wire harnesses are prevented from being pulled.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic devices, in particular to an electric oil pump integrated with a control unit. Background Art

[0002] The cab flipping and lifting mechanism is an important engineering machinery equipment, which is widely used in the construction, transportation, electricity and other industries. The electric oil pump is one of the core components of the cab flipping and lifting mechanism. It provides power for the lifting mechanism, so that the cab can be flipped and lifted. The working principle of the cab flipping and lifting mechanism is to convert the oil pressure into mechanical energy through the electric oil pump, thereby driving the movement of the lifting mechanism. The electric oil pump converts electrical energy into hydraulic energy, and then transmits it to the hydraulic cylinder of the lifting mechanism through the oil pipe, so that the piston of the hydraulic cylinder moves. The movement of the piston drives the gear or screw of the lifting mechanism to rotate, thereby realizing the lifting and flipping of the cab.

[0003] At present, the oil pump of the automobile cab flipping and lifting mechanism is mostly supplied by a multi-plunger oil pump. For example, a multi-plunger electric radial piston pump disclosed in a Chinese patent application (Announcement No.: CN2773342Y) includes a motor, a pump housing, a plurality of plungers evenly distributed on the pump body, and a camshaft. The oil suction hole in the plunger hole of the pump body is connected to the total oil inlet on the pump housing, and the oil outlet in the plunger hole of the pump body is connected to the total oil outlet on the pump housing. A return ring is fixed on the camshaft, and each plunger has a large end shoulder, which is accommodated between the cam and the return ring. The radial gap between the cam of the camshaft and the return ring limits the stroke of the plunger. The plunger is ejected by the cam and returned by the return ring. In general, five plungers are evenly distributed on the circumference, and the plunger diameter is within Φ5mm to achieve high-speed and high-pressure oil supply.

[0004] In the prior art, oil pumps usually have two forms. One is that the motor and the base form a power unit, in which the motor extends out of the wiring harness and is connected to the starting control unit module of the whole vehicle, so that the whole vehicle controls the starting unit, and the starting unit controls the motor. The second type is that the control unit and the motor are connected by a wiring harness, and the starting unit is fixed to the base assembly by a nut, and the motor is also fixed to the base assembly by a nut, forming a combined power unit. However, the defects are that the motor and the starting unit are connected by a wiring harness, and the starting unit is connected to the control button of the whole vehicle. There are many wiring harnesses, the cost is high, and there is a problem of poor waterproof and dustproof. The wiring harness is easy to be pulled during the loading process, causing poor contact and other faults, so it is necessary to improve it. Utility Model Content

[0005] The purpose of the utility model is to provide an electric oil pump with an integrated control unit in view of the defects and shortcomings of the prior art, which has a simple and reasonable structure, is easy to operate, has few connecting wires, has low cost, has good waterproof and dustproof effects, is not easy to pull the wire harness, and is not prone to malfunction.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] An electric oil pump integrated with a control unit described in the utility model comprises a motor assembly and a base assembly, wherein the motor assembly is fixedly connected to the base assembly, the motor assembly comprises a motor, a starting control unit module and a connector, an accommodating space is provided in the motor, the starting control unit module and the connector are arranged in the accommodating space, the starting control unit module is electrically connected to the motor and the connector respectively, the connector is connected to an external switch through an external wiring harness, the base assembly comprises a base body and a multi-plunger pump core assembly, the multi-plunger pump core assembly is arranged in the base body, the motor is fixedly connected to the base body, the output shaft of the motor extends into the base body and cooperates with the multi-plunger pump core assembly, and the base body is provided with an oil inlet and an oil outlet that cooperate with the multi-plunger pump core assembly.

[0008] Furthermore, the motor comprises a motor body and a brush cover, wherein the brush cover is fixedly arranged above the motor body, and the accommodating space is formed between the brush cover and the motor body.

[0009] Furthermore, one end of the connector extends out of the brush cover and is fixedly connected to the brush cover.

[0010] Furthermore, an oil path channel connecting the oil inlet, the oil outlet and the multi-plunger pump core assembly is formed in the base body, and the oil path channel includes an oil suction channel and an oil outlet channel. The multi-plunger pump core assembly is provided with an oil suction hole and an oil outlet hole. The oil inlet is connected to the oil suction hole through the oil suction channel, and the oil outlet hole is connected to the oil outlet through the oil outlet channel.

[0011] Furthermore, the base body is also provided with an oil inlet pipe joint connected to the oil inlet and an oil outlet pipe joint connected to the oil outlet.

[0012] Furthermore, the oil inlet pipe joint and the oil outlet pipe joint are arranged on the same side of the base body.

[0013] Furthermore, an elastic seal is also provided on the oil outlet pipe joint, and the elastic seal always has a tendency to block the oil outlet channel.

[0014] Furthermore, the elastic sealing member includes a spring and a steel ball, one end of the spring abuts against the oil outlet pipe joint, and the other end of the spring abuts against the steel ball, and the steel ball blocks the oil outlet channel under the elastic force of the spring.

[0015] Furthermore, a safety valve is provided in the oil passage. When the oil pressure in the oil passage exceeds a preset range of the safety valve, the safety valve automatically opens to release part of the pressure.

[0016] Furthermore, the multi-plunger pump core assembly is a five-plunger pump core assembly.

[0017] The beneficial effects of the utility model are as follows: the utility model describes an electric oil pump integrated with a control unit, and the connector is connected to an external switch through an external wiring harness. This connection method is simple and reliable, and can ensure the stability and accuracy of signal transmission. The control unit module and the motor are started by controlling the external switch, and the operation is more convenient. The start control unit module and the connector are both arranged in the accommodating space, which effectively saves space, reduces the use of wiring harnesses, reduces costs, prevents pulling and wear of the wiring harness during use, reduces faults, prevents the control unit module from being bumped during use, and improves the waterproof and dustproof capabilities. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model in the first viewing angle;

[0019] Figure 2 It is a schematic diagram of the overall structure of the utility model under a second viewing angle;

[0020] Figure 3 It is a schematic diagram of the structure of the motor assembly;

[0021] Figure 4 This is a schematic diagram of the structure of the utility model in which the brush cover is separated from the motor body;

[0022] Figure 5 is a schematic diagram of a first cross-sectional structure of a base assembly;

[0023] Figure 6 is a schematic diagram of the first cross-sectional structure of the motor body and the base assembly;

[0024] Figure 7 is a second cross-sectional structural schematic diagram of the motor body and the base assembly;

[0025] Figure 8 is a third cross-sectional structural schematic diagram of the motor body and the base assembly;

[0026] Fig. 9 It is a second cross-sectional structural schematic diagram of the base assembly.

[0027] Figure 1-9In: 1. Motor assembly; 2. Base assembly; 3. Brush cover; 4. Motor body; 5. Start control unit module; 6. Connector; 7. Wiring harness; 8. Base body; 9. Multi-plunger pump core assembly; 10. Output shaft; 11. Oil inlet pipe joint; 12. Oil outlet pipe joint; 13. Spring; 14. Steel ball; 15. Safety valve; 16. Bolt; 17. Oil outlet channel; 18. Oil suction channel; 19. Oil suction hole; 20. Oil outlet hole. DETAILED DESCRIPTION

[0028] The utility model is further described below in conjunction with the accompanying drawings.

[0029] like Figure 1-9 An electric oil pump with an integrated control unit is shown, comprising a motor assembly 1 and a base assembly 2, wherein the motor assembly 1 is fixedly connected to the base assembly 2, the motor assembly 1 comprising a motor, a starting control unit module 5 and a connector 6, an accommodating space is provided in the motor, the starting control unit module 5 and the connector 6 are arranged in the accommodating space, the starting control unit module 5 is electrically connected to the motor and the connector 6 respectively, specifically, the starting control unit module 5 is connected to the motor and the connector 6 through a wiring harness 7, and the connector 6 is connected to an external switch through an external wiring harness 7, this connection method is simple and reliable, can ensure the stability and accuracy of signal transmission, the starting control unit module 5 and the motor are controlled to work through an external switch, and the operation is more convenient, the starting control unit module 5 and the connector 6 are both arranged in the accommodating space, which effectively saves space, reduces the use of the wiring harness 7, reduces costs, prevents pulling and wear of the wiring harness 7 during use, reduces failures, prevents the control unit module from being bumped during use, and improves the waterproof and dustproof capabilities.

[0030] Preferably, in this embodiment, refer to Figure 4 The motor includes a motor body 4 and a brush cover 3. The brush cover 3 is fixedly arranged above the motor body 4. The connection between the two is firm and not easy to separate. The accommodating space is formed between the brush cover 3 and the motor body 4. The brush cover 3 plays a role in protecting the start control unit module 5 and the connector 6 to prevent external impurities, dust and water droplets from entering, thereby extending the service life. The brush cover 3 is usually made of insulating material to prevent current leakage or short circuit problems.

[0031] Preferably, in this embodiment, one end of the connector 6 extends out of the brush cover 3 and is fixedly connected to the brush cover 3 to facilitate connection with the external wiring harness 7 .

[0032] Specifically, see Figure 5The base assembly 2 includes a base body 8 and a multi-plunger pump core assembly 9. The multi-plunger pump core assembly 9 is arranged in the base body 8. The base body 8 serves as a foundation to provide stable support. The multi-plunger pump core assembly 9 in the base body 8 is a core component responsible for converting low-pressure oil into high-pressure oil for output. The motor is fixedly connected to the base body 8. Specifically, the motor and the base body 8 are fixedly connected by bolts 16. There are four bolts 16. Bolt 16 holes corresponding to the bolts 16 are provided on the motor and the base body 8. The bolts 16 pass through the bolt 16 holes and are tightened so that the motor and the base body 8 are tightly connected together to ensure stable operation of the motor.

[0033] Specifically, the output shaft 10 of the motor extends into the base body 8 and cooperates with the multi-plunger pump core assembly 9. The base body 8 is provided with an oil inlet and an oil outlet that cooperate with the multi-plunger pump core assembly 9. Specifically, the motor drives the multi-plunger pump core assembly 9 to rotate through the output shaft 10, sucks in the external low-pressure oil through the oil inlet, and pressurizes the inside of the multi-plunger pump core assembly 9, converting the low-pressure oil into high-pressure oil for output.

[0034] The working principle of the utility model is as follows: the connector 6 is connected to the external switch through the external wiring harness 7, and the switch is started. The corresponding signal will be transmitted to the connector 6 through the external wiring harness 7, and then the connector 6 transmits these signals to the starting control unit module 5. After receiving the signal, the starting control unit module 5 controls the starting and operation of the motor. The motor drives the multi-plunger pump core assembly 9 to rotate through the output shaft 10, sucks in the external low-pressure oil through the oil inlet, and pressurizes the inside of the multi-plunger pump core assembly 9 to convert the low-pressure oil into high-pressure oil for output.

[0035] Preferably, in this embodiment, refer to Fig. 9 An oil path connecting the oil inlet, the oil outlet and the multi-plunger pump core assembly 9 is formed in the base body 8, and the oil path includes an oil suction channel 18 and an oil outlet channel 17. The multi-plunger pump core assembly 9 is provided with an oil suction hole 19 and an oil outlet hole 20. The oil inlet is connected with the oil suction hole 19 through the oil suction channel 18, and the oil outlet hole 20 is connected with the oil outlet through the oil outlet channel 17. The base body 8 is also provided with an oil inlet pipe joint 11 connected to the oil inlet and an oil outlet pipe joint 12 connected to the oil outlet. The oil inlet pipe joint 11 is connected to an external oil tank or other oil source, and oil is sucked therefrom. The oil is transported to the multi-plunger pump core assembly 9 through the oil suction channel 18. Under the action of the multi-plunger pump core assembly 9, the oil is converted into high-pressure oil and transported to the oil outlet pipe joint 12 through the oil outlet channel 17. The oil outlet pipe joint 12 is connected to the actuator to transport the high-pressure oil to the actuator.

[0036] Specifically, see Figure 2The oil inlet pipe joint 11 and the oil outlet pipe joint 12 are arranged on the same side of the base body 8, making installation and maintenance more convenient.

[0037] Preferably, in this embodiment, the multi-plunger pump core assembly 9 is a five-plunger pump core assembly, the core part of which is the pump body, and five plungers are evenly distributed on the pump body. This design enables the pump to operate efficiently and smoothly during operation.

[0038] Specifically, the motor converts electrical energy into mechanical energy, and is connected to the base assembly 2 through the output shaft 10, driving the five-plunger pump core assembly to rotate. The five plungers inside the pump body reciprocate in their respective working chambers. During the suction stroke, the plunger moves from the suction end of the pump body to the discharge end, forming a vacuum area. Because the oil is subjected to the negative pressure at the suction end, the oil enters the pump body from the oil suction channel 18 to complete the suction process. When the plunger continues to reciprocate and enters the compression stroke, the plunger compresses the oil to increase the pressure of the oil. At this time, the pressure in the pump body gradually increases until it reaches the set pressure. In the discharge stroke, the plunger moves from the discharge end of the pump body to the suction end. Since the pressure in the pump body is higher than the pressure in the oil outlet channel 17, the high-pressure oil is pressed into the oil outlet channel 17 to complete the discharge process. Through continuous reciprocating motion, the suction, compression and discharge of the oil are achieved, forming a cycle process.

[0039] Regarding the specific structure of the five-plunger pump core assembly, reference may be made to a multi-plunger electric radial piston pump disclosed in a Chinese patent application (publication number: CN2773342Y). In view of the fact that the basic structure / principle of the five-plunger pump core assembly has been disclosed in detail in the prior art, it will not be described in detail in this embodiment.

[0040] Preferably, in this embodiment, an elastic seal is further provided on the oil outlet pipe joint 12, and the elastic seal always has a tendency to block the oil outlet channel 17. The elastic seal includes a spring 13 and a steel ball 14. One end of the spring 13 abuts against the oil outlet pipe joint 12, and the other end of the spring 13 abuts against the steel ball 14. The steel ball 14 blocks the oil outlet channel 17 under the elastic force of the spring 13. When high-pressure oil flows through, it pushes the steel ball 14 to move. At this time, a certain gap is generated between the steel ball 14 and the oil outlet channel 17, so that the high-pressure oil can flow out smoothly through the oil outlet pipe joint 12.

[0041] Preferably, in this embodiment, a safety valve 15 is further provided in the oil passage. When the oil pressure in the oil passage exceeds a preset range of the safety valve 15, the safety valve 15 automatically opens to release part of the pressure, so that the pressure in the oil passage is maintained within a safe range, thereby preventing excessive pressure from causing impact damage to various components.

[0042] The above description is only a preferred embodiment of the present utility model, so all equivalent changes or modifications made according to the structure, features and principles described in the scope of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. An electric oil pump integrated with a control unit, comprising a motor assembly (1) and a base assembly (2), wherein the motor assembly (1) is fixedly connected to the base assembly (2). Features: The motor assembly (1) comprises a motor, a starting control unit module (5) and a connector (6); a housing space is provided in the motor; the starting control unit module (5) and the connector (6) are arranged in the housing space; the starting control unit module (5) is electrically connected to the motor and the connector (6) respectively; the connector (6) is connected to an external switch via an external wiring harness (7); the base assembly (2) comprises a base body (8) and a multi-plunger pump core assembly (9); the multi-plunger pump core assembly (9) is arranged in the base body (8); the motor is fixedly connected to the base body (8); the output shaft (10) of the motor extends into the base body (8) and cooperates with the multi-plunger pump core assembly (9); and the base body (8) is provided with an oil inlet and an oil outlet that cooperate with the multi-plunger pump core assembly (9).

2. An electric oil pump integrated with a control unit according to claim 1, Features: The motor comprises a motor body (4) and a brush cover (3); the brush cover (3) is fixedly arranged above the motor body (4); and the accommodation space is formed between the brush cover (3) and the motor body (4).

3. An electric oil pump integrated with a control unit according to claim 2, Features: One end of the connector (6) extends out of the brush cover (3) and is fixedly connected to the brush cover (3).

4. The electric oil pump integrated with a control unit according to claim 1, Features: An oil passage connecting an oil inlet, an oil outlet and a multi-plunger pump core assembly (9) is formed in the base body (8), the oil passage comprising an oil suction passage (18) and an oil outlet passage (17), an oil suction hole (19) and an oil outlet hole (20) are provided on the multi-plunger pump core assembly (9), the oil inlet is connected to the oil suction hole (19) via the oil suction passage (18), and the oil outlet hole (20) is connected to the oil outlet via the oil outlet passage (17).

5. An electric oil pump integrated with a control unit according to claim 4, Features: The base body (8) is also provided with an oil inlet pipe joint (11) connected to the oil inlet and an oil outlet pipe joint (12) connected to the oil outlet.

6. An electric oil pump integrated with a control unit according to claim 5, Features: The oil inlet pipe joint (11) and the oil outlet pipe joint (12) are arranged on the same side of the base body (8).

7. An electric oil pump integrated with a control unit according to claim 5, Features: An elastic sealing member is also provided on the oil outlet pipe joint (12), and the elastic sealing member always has a tendency to block the oil outlet passage (17).

8. An electric oil pump integrated with a control unit according to claim 7, Features: The elastic sealing member comprises a spring (13) and a steel ball (14); one end of the spring (13) abuts against the oil outlet pipe joint (12); the other end of the spring (13) abuts against the steel ball (14); the steel ball (14) blocks the oil outlet passage (17) under the elastic force of the spring (13).

9. The electric oil pump integrated with a control unit according to claim 4, Features: A safety valve (15) is also provided in the oil passage. When the oil pressure in the oil passage exceeds a preset range of the safety valve (15), the safety valve (15) automatically opens to release part of the pressure.

10. The electric oil pump integrated with a control unit according to claim 1, Features: The multi-plunger pump core assembly (9) is a five-plunger pump core assembly.

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