Integrated starting and generating integrated motor

Abstract

The utility model discloses an integrated starting and generating integrated motor, which comprises a motor, a planetary reducer, a clutch I and a clutch II, and is characterized in that the planetary reducer is integrated on a motor shaft of the motor through the clutch I and the clutch II; a motor shaft is in transmission connection with an engine crankshaft through a planetary reducer; the planetary reducer is connected with a motor shaft and an engine crankshaft through a first clutch in the first power flowing direction so as to achieve differential rotation. The first power flow direction is from the motor shaft to the engine crankshaft; the planetary reducer is connected with an engine crankshaft and a motor shaft through a second clutch in the second power flowing direction so as to achieve same-speed rotation. The second power flow direction is from the engine crankshaft to the motor shaft. By balancing the relation between the motor torque and the motor input current when the integrated motor is in a starting state, the planetary speed reduction structure is combined with the integrated motor, the structure which is easy to start the engine and does not affect the power generation of the motor is realized, and the whole structure is integrated and light in weight.

Description

Technical Field

[0001] The present application relates to the technical field of motors, and in particular to an integrated starting motor. Background Art

[0002] The electrical control system of an aircraft or hybrid vehicle requires a starter to start the engine and a generator to charge the battery. These two motors not only make the control system more complex, but also increase the size and mass. In recent years, the starter / generator integrated motor used to start the engine and generate electricity after the engine is started has been increasingly widely used.

[0003] The starting / generating system mainly consists of three parts: the motor, the engine, and the controller. The motor is coaxially connected to the engine, and the energy flow between the motor and the battery is realized by controlling the working state of the power converter. The starting / generating integrated system is based on the reversible principle of the motor, that is, the motor can work as both a motor and a generator. When the engine needs to be started, the engine acts as a load, and the starting / generating integrated motor works as a motor, which consumes the electrical energy in the battery and converts it into mechanical energy to drive the engine to work. When the engine speed reaches a certain value, the engine can ignite and run by itself to start; when the start is completed, the engine becomes the prime mover, and the starting / generating integrated motor changes from the starting state to the generating state, working as a generator. The engine drives the starting / generating integrated motor to operate, converting mechanical energy into electrical energy, and charging the battery through rectification and voltage stabilization through the power converter.

[0004] In the starting state, the integrated motor needs to provide a large torque input to the engine as a starting condition. Since the motor shaft is directly connected to the engine crankshaft and the speed is the same, it is a key capability indicator for the starting capability of the integrated motor. Under the same speed, the output torque capacity of the motor is increased by increasing the input current of the integrated motor, but the short-term high current has extremely high requirements on the winding temperature resistance level and heat dissipation capacity of the integrated motor. Once the temperature exceeds the temperature resistance level of the winding copper wire, it will cause the winding to be damaged and the motor to fail.

[0005] Therefore, there is an urgent need to provide an integrated starting motor to solve the above-mentioned technical problems. Utility Model Content

[0006] The utility model provides an integrated starting motor. By balancing the relationship between the motor torque and the motor input current when the integrated motor is in the starting state, a planetary reduction structure is combined with the integrated motor, thereby achieving a structure that is easy to start the engine without affecting the power generation of the motor, and the overall structure is integrated and lightweight.

[0007] According to some embodiments, the utility model provides an integrated starter motor, comprising: a motor, a planetary reducer, a clutch 1 and a clutch 2, wherein the planetary reducer is integrated on the motor shaft of the motor through the clutch 1 and the clutch 2; the motor shaft is transmission-connected to the engine crankshaft through the planetary reducer; wherein, the planetary reducer connects the motor shaft and the engine crankshaft through the clutch 1 in a first power flow direction to achieve differential rotation; the first power flow direction is from the motor shaft to the engine crankshaft; the planetary reducer connects the engine crankshaft and the motor shaft through the clutch 2 in a second power flow direction to achieve synchronous rotation; the second power flow direction is from the engine crankshaft to the motor shaft.

[0008] Optionally, the planetary reducer includes a planetary gear set, an inner gear ring, a planet carrier one and a planet carrier two; the planet carrier one and the planet carrier two are arranged opposite to each other, the planet carrier one is arranged on the engine crankshaft, and the planet carrier two is arranged on the motor shaft through the clutch two, and the clutch two can be disengaged from or connected to the motor shaft; the inner gear ring is positioned on the motor housing and is located between the planet carrier one and the planet carrier two; the planetary gear set includes three planetary wheels, the three planetary wheels are evenly distributed in the inner gear ring and each is positioned on a pin connecting the planet carrier one and the planet carrier two through a bearing; the clutch one is arranged at the center position of the three planetary wheels and is connected to each other, and the clutch one can be disengaged from or connected to the motor shaft.

[0009] Optionally, the clutch 1 and the clutch 2 are both arranged coaxially with the motor shaft.

[0010] Optionally, in a first power flow direction, the clutch 1 is connected to the motor shaft and the clutch 2 is disengaged from the motor shaft; in a second power flow direction, the clutch 2 is connected to the motor shaft and the clutch 1 is disengaged from the motor shaft.

[0011] Optionally, the clutch includes but is not limited to: a magnetic clutch, a hydraulic clutch or a mechanical clutch.

[0012] Optionally, the clutch 1 may also be an overrunning clutch.

[0013] Optionally, the second clutch includes but is not limited to: a magnetic clutch, a hydraulic clutch or a mechanical clutch.

[0014] Optionally, the second clutch may also be an overrunning clutch.

[0015] Beneficial effects:

[0016] In the utility model, by balancing the relationship between the motor torque and the motor input current in the motor starting state, the planetary reducer is integrated on the motor shaft of the motor through clutch 1 and clutch 2 by utilizing the deceleration and torque-increasing characteristics of the planetary reducer. In the starting condition, in the first power flow direction, that is, from the motor shaft to the engine crankshaft, the planetary reducer connects the motor shaft and the engine crankshaft through clutch 1 to achieve differential rotation, so that the speed torque generated by the motor can be transmitted to the engine crankshaft end to generate low-speed and high torque for engine starting; in the power generation condition, in the second power flow direction, that is, from the engine crankshaft to the motor shaft, the planetary reducer connects the engine crankshaft and the motor shaft through clutch 2 to achieve the same speed rotation, so that the motor shaft input speed is consistent with the engine crankshaft speed without affecting the motor power generation, thereby optimizing and integrating the overall structure, realizing a structure that is easy to start the engine and does not affect the motor power generation, and realizing the overall structure integration and lightweight. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the conventional technology, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 is a cross-sectional schematic diagram of an integrated starting motor in this embodiment;

[0019] Figure 2 It is a schematic diagram showing the relationship between the planetary gear set and the inner ring gear in this embodiment.

[0020] Figure numerals: 1, motor, 11, motor shaft; 2, planetary reducer; 21, planetary gear set; 211, planetary gear; 22, inner ring gear; 23, planetary carrier 1; 24, planetary carrier 2; 3, clutch 1; 4, clutch 2; 5, pin shaft. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the embodiments of the utility model will be described in detail below in conjunction with the accompanying drawings. However, it can be understood by those skilled in the art that in each embodiment of the utility model, many technical details are proposed in order to enable readers to better understand the utility model. However, even without these technical details and various changes and modifications based on the following embodiments, the technical scheme claimed for protection of the utility model can also be implemented. The division of the following embodiments is for the convenience of description and should not constitute any limitation on the specific implementation of the utility model. The various embodiments can be combined and referenced with each other without contradiction.

[0022] The following is a detailed description of an integrated starting motor provided by this embodiment in conjunction with the accompanying drawings. Figure 1 As shown, it includes: a motor 1, a planetary reducer 2, a clutch 1 3 and a clutch 2 4, the planetary reducer 2 is integrated on the motor shaft 11 of the motor 1 through the clutch 1 3 and the clutch 2 4, and the motor shaft 11 is then transmission-connected to the engine crankshaft of the engine through the planetary reducer 2; wherein, the planetary reducer 2 connects the motor shaft 11 and the engine crankshaft through the clutch 1 3 in the first power flow direction to achieve differential rotation; the first power flow direction is from the motor shaft 11 to the engine crankshaft; the planetary reducer 2 connects the engine crankshaft and the motor shaft 11 through the clutch 2 4 in the second power flow direction to achieve the same speed rotation; the second power flow direction is from the engine crankshaft to the motor shaft 11.

[0023] In this embodiment, by balancing the relationship between the motor torque and the motor input current in the motor starting state and utilizing the deceleration and torque increase characteristics of the planetary reducer, the planetary reducer 2 is integrated on the motor shaft 11 through clutch 1 3 and clutch 2 4. In the starting condition, in the first power flow direction, that is, from the motor shaft 11 to the engine crankshaft, the planetary reducer 2 connects the motor shaft 11 and the engine crankshaft through clutch 1 3 to achieve differential rotation, so that the speed torque generated by the motor 1 can be transmitted to the engine crankshaft end to generate low-speed and high torque for engine starting; in the power generation condition, in the second power flow direction, that is, from the engine crankshaft to the motor shaft 11, the planetary reducer 2 connects the engine crankshaft and the motor shaft 11 through clutch 2 4 to achieve the same speed rotation, so that the input speed of the motor shaft 11 is consistent with the speed of the engine crankshaft without affecting the power generation of the motor 1.

[0024] Please refer to Figure 1 , Figure 2 As shown, in this embodiment, it should be noted that the planetary reducer 2 includes a planetary gear set 21, an inner gear ring 22, a planet carrier 1 23 and a planet carrier 2 24; the planet carrier 1 23 and the planet carrier 2 24 are arranged relative to each other and remain coaxial with the motor shaft 11, and the planet carrier 1 23 and the planet carrier 2 24 are connected by a pin 5, so that the planet carrier 1 23 and the planet carrier 2 24 form a whole and maintain good coaxiality. The planet carrier 1 23 is connected to the engine crankshaft, and the planet carrier 2 24 is arranged on the motor shaft 11 through the clutch 2 4. It can be understood that the planet carrier 2 24 is connected to the clutch 2 4, and the clutch 2 4 can be separated from or connected to the motor shaft 11. Therefore, when the clutch 2 4 is coaxially connected to the motor shaft 11, the planet carrier 2 24, the clutch 2 4 and the motor shaft 11 can rotate synchronously; when the clutch 2 4 is separated from the motor shaft 11, the motor shaft 11 can rotate alone.

[0025] The inner ring gear 22 is positioned on the motor housing and is also coaxially arranged with the motor shaft 11. The inner ring gear 22 is located in the middle position of the planetary carrier 1 23 and the planetary carrier 2 24. The motor shaft 11 passes through the planetary carrier 24 and extends into the inner ring gear 22. Therefore, the planetary carrier 2 24, the inner ring gear 22, and the planetary carrier 1 23 are arranged in sequence along the axial direction of the motor shaft 11.

[0026] The planetary gear set 21 includes three planetary gears 211, which are evenly distributed in the inner gear ring 22 and are each positioned on the pin 5 connecting the planet carrier 1 23 and the planet carrier 2 24 through a bearing; the clutch 1 3 is arranged at the center of the three planetary gears 211 and is connected to the three planetary gears 211, and the clutch 1 3 can be connected to or disconnected from the motor shaft 11. Therefore, when the clutch 1 3 is in contact with the motor shaft 11, the motor shaft 11, the clutch 1 3, and the planetary gears 211 can rotate synchronously, and the planetary gears 211 can also revolve in the inner gear ring 22 while rotating on their own, and the planetary gears 211 can make a circular motion in the inner gear ring 22 while revolving with the pin 5; when the clutch 1 3 is disconnected from the motor shaft 11, the motor shaft 11 can rotate alone.

[0027] In this embodiment, the planetary gear set 21 is taken as a single gear for example. If the volume permits, a multi-stage planetary reducer can also be used to achieve a higher and more reasonable speed ratio. No specific limitation is made in this embodiment.

[0028] Please continue to refer to Figure 1 , Figure 2 As shown, in one feasible manner, clutch 13 includes but is not limited to: a magnetic clutch, a hydraulic clutch or a mechanical clutch. By adopting a magnetic clutch, a hydraulic clutch or a mechanical clutch, connection or disconnection with the motor shaft 11 can be achieved. Of course, clutch 13 can also be an overrunning clutch, which is not specifically limited in this embodiment.

[0029] In another feasible manner, clutch 2 4 includes but is not limited to: a magnetic clutch, a hydraulic clutch, or a mechanical clutch. By adopting a magnetic clutch, a hydraulic clutch, or a mechanical clutch, it can be connected to or disconnected from the motor shaft 11. Of course, clutch 2 4 can also be an overrunning clutch, which is not specifically limited in this embodiment.

[0030] Principle of the embodiment: In the starting condition: the motor shaft 11 outputs speed torque, drives the clutch 1 3 to operate, the clutch 2 4 is in a disengaged state, the clutch 1 3 drives the planetary gear 211 to rotate, the ring gear 22 is fixed, the planetary gear 211 drives the pin 5 to make a circular motion in the ring gear 22, and the pin 5 is connected to the planet carrier 1 23, the planet carrier 1 23 and the pin 5 rotate synchronously, so the speed torque generated by the motor shaft 11 transmits the energy to one end of the planet carrier 1 23 through the planetary system for output, due to the planetary system's deceleration and torque-increasing characteristics, the planet carrier 1 23 is connected to the engine crankshaft end, so when the motor shaft 11 generates speed torque, it can be transmitted to the engine crankshaft end to generate low-speed high torque for engine starting;

[0031] In the power generation condition: the engine drives the motor 1 to run, the engine crankshaft outputs a speed torque, which is transmitted to the pin shaft 5 through the planetary carrier 1 23, and the pin shaft 5 is fixedly connected to the planetary carrier 2 24, and the speed torque is synchronized to the planetary carrier 2 24 and the planetary gear 211. Since the engine running speed is greater than or equal to the starting speed under the power generation condition, when the speed torque is transmitted from the pin shaft 5 to the planetary gear 211, the speed is greater than the speed under the starting condition, and the clutch 1 3 will disengage the motor shaft 11 as an overrunning clutch. At this time, the speed torque cannot be transmitted to the motor shaft 11 through the clutch 1 3, and the reducer is idling at this time and does not play a role in deceleration; but due to high-speed operation, the clutch 2 4 can be connected to the motor shaft 11 as an overrunning clutch at this time, so the speed torque is transmitted to the motor shaft 11 through the planetary carrier 2 24 and the clutch 2 4. In other words, the engine crankshaft drives the planetary carrier 1 23 and the planetary carrier 2 24 to rotate at the same speed, and the planetary carrier 2 24 then drives the motor shaft 11 to rotate at the same speed through the clutch 2 4, so that the engine and the motor 1 can run synchronously, and the motor 1 enters the generator condition.

[0032] It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation on the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included in the scope of protection of the present invention. In addition, the claims attached to the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the attached claims or the equivalent forms of such scope and boundaries.

Claims

1. An integrated starting motor, characterized in that: include: A motor (1), a planetary reducer (2), a clutch 1 (3) and a clutch 2 (4), wherein the planetary reducer (2) is integrated on a motor shaft (11) of the motor (1) through the clutch 1 (3) and the clutch 2 (4); the motor shaft (11) is drivingly connected to an engine crankshaft through the planetary reducer (2); wherein: The planetary reducer (2) connects the motor shaft (11) and the engine crankshaft through the clutch 1 (3) in a first power flow direction to achieve differential rotation; the first power flow direction is from the motor shaft (11) to the engine crankshaft; The planetary reducer (2) connects the engine crankshaft and the motor shaft (11) via the second clutch (4) in the second power flow direction to achieve the same speed rotation; the second power flow direction is from the engine crankshaft to the motor shaft (11).

2. The integrated starting motor according to claim 1, characterized in that: The planetary reducer (2) comprises a planetary gear set (21), an inner gear ring (22), a planet carrier 1 (23) and a planet carrier 2 (24); The planet carrier 1 (23) and the planet carrier 2 (24) are arranged opposite to each other, the planet carrier 1 (23) is arranged on the engine crankshaft, the planet carrier 2 (24) is arranged on the motor shaft (11) through the clutch 2 (4), and the clutch 2 (4) can be disconnected from or connected to the motor shaft (11); The inner gear ring (22) is positioned on the motor housing and between the planet carrier 1 (23) and the planet carrier 2 (24); The planetary gear set (21) comprises three planetary gears (211), the three planetary gears (211) are evenly distributed in the inner gear ring (22) and each is positioned on a pin shaft (5) connecting the planet carrier 1 (23) and the planet carrier 2 (24) through a bearing; The clutch one (3) is arranged at the center position of the three planetary gears (211) and is connected to each other. The clutch one (3) can be disconnected from or connected to the motor shaft (11).

3. The integrated starting motor according to claim 2, characterized in that: The clutch 1 (3) and the clutch 2 (4) are both coaxially arranged with the motor shaft (11).

4. The integrated starting motor according to claim 3, characterized in that: In the first power flow direction, the clutch 1 (3) is connected to the motor shaft (11), and the clutch 2 (4) is disconnected from the motor shaft (11); In the second power flow direction, the second clutch (4) is connected to the motor shaft (11), and the first clutch (3) is disengaged from the motor shaft (11).

5. The integrated starting motor according to any one of claims 2 to 4, characterized in that: The clutch one (3) is a magnetic clutch, a hydraulic clutch or a mechanical clutch.

6. The integrated starting motor according to claim 5, characterized in that: The clutch one (3) can also be an overrunning clutch.

7. The integrated starting motor according to any one of claims 2 to 4, characterized in that: The second clutch (4) is a magnetic clutch, a hydraulic clutch or a mechanical clutch.

8. The integrated starting motor according to claim 7, characterized in that: The second clutch (4) may also be an overrunning clutch.

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