A variable speed ratio automobile generator

Abstract

The present invention relates to a variable speed ratio automobile generator, which is connected to the engine driving wheel through a pulley, and includes a generator housing, a rotor shaft arranged inside the generator housing, and a moving wheel and a planetary wheel installed on the rotor shaft; it is characterized in that one side of the pulley is matched with the moving wheel through an electromagnetic control device, and the electromagnetic control device includes an iron core formed inside the generator housing and a coil wound around the outer periphery of the iron core; the structure of the moving wheel includes: a meshing portion for connecting with the pulley, an adsorption surface that is in adsorption contact with the iron core when the coil is energized, a low-speed contact surface that is matched with the rotor shaft when the coil is energized, and a high-speed contact surface that is matched with the planetary wheel when the coil is de-energized. The present invention enables the generator to generate more electricity by increasing the rotor speed when the engine is at low speed, so as to meet the power demand of the whole vehicle. The battery power is replenished in time when the battery is low.

Description

Technical Field

[0001] The invention relates to the technical field of automobile generators, in particular to an automobile generator with a variable speed ratio. Background Art

[0002] The power generation capacity of automobile generators varies with the rotor speed. The power generation capacity of the generator is relatively small when the rotor speed is low, and the power generation capacity is relatively large when the speed is high. At present, vehicle manufacturers need to consider fuel consumption and cost when selecting the generator capacity. The generator capacity cannot meet the power consumption of electrical appliances under some working conditions at low speed. At this time, batteries are needed to supply power to electrical appliances. If this working condition is operated for a long time, the battery will be depleted, which will affect the service life of the battery. When the car is in use, it is usually used when the engine is not running, such as when the car is parked and listening to music. When the battery is in a depleted state, it is necessary to charge the battery in time to start the engine. At this time, in order to provide a large current to the generator, the engine speed must be increased. Under normal circumstances, the driver will not deliberately increase the engine speed by accelerator.

[0003] Therefore, improving the power generation capacity of the generator when the engine is at low speed, avoiding the battery from being depleted for a long time under low engine speed conditions, and extending the service life of the battery are the technical issues that this application focuses on. Summary of the invention

[0004] The present invention aims to solve the problem of insufficient power generation capacity of the above-mentioned engine at low speed, and further provides a variable speed ratio automobile generator, the purpose of which is to further improve the power generation capacity of the generator at low engine speed, prevent battery depletion, and effectively extend the service life of the battery.

[0005] To solve the above problems, the technical solution adopted by the present invention is:

[0006] A variable speed ratio automobile generator is connected to the engine driving wheel through a pulley. Its structure includes a generator housing, a rotor shaft arranged inside the generator housing, and a moving wheel and a planetary wheel installed on the rotor shaft. The special feature is that:

[0007] One side of the pulley is in transmission cooperation with the moving wheel via an electromagnetic control device, and the axial displacement of the moving wheel on the rotor shaft is controlled by the electromagnetic control device;

[0008] The electromagnetic control device comprises an iron core formed inside the generator housing and a coil wound around the outer circumference of the iron core;

[0009] The structure of the moving wheel includes: an engaging portion for connecting with the pulley transmission, an adsorption surface for adsorbing and contacting with the iron core when the coil is energized, a low-speed contact surface for cooperating with the rotor shaft transmission when the coil is energized, and a high-speed contact surface for cooperating with the planetary gear transmission when the coil is de-energized.

[0010] A contact ring is installed on the rotor shaft, the low-speed contact surface of the moving wheel is arranged opposite to the contact ring, and a concave-convex interlocking structure is arranged between the two;

[0011] The high-speed contact surface of the moving wheel is arranged opposite to the end surface of the planetary wheel, and a concave-convex interlocking structure is correspondingly arranged between the two.

[0012] A return spring is pressed on one side of the moving wheel. The return spring acts on one side of the moving wheel and always keeps a tendency to press the high-speed contact surface of the moving wheel toward the planetary wheel.

[0013] The variable speed ratio automobile generator of the present invention is connected to the engine through a single conveyor belt, and the speed change part is arranged inside the generator. The arranged planetary gear and the rotor shaft rotate coaxially under the control of the electromagnetic clutch to achieve the second gear speed, so that the rotor of the generator has two speed ratios, ensuring that the rotor of the generator can run at a high speed when the engine speed is low, and then it has the ability to output a large current, so that the generator can generate more electricity by increasing the rotor speed when the engine speed is low, so as to meet the power demand of the whole vehicle. The battery power is replenished in time when the battery is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a cross-sectional view of a variable speed structure of a variable speed generator;

[0015] Figure 2 This is the exploded view of the parts of the variable speed drive of the generator;

[0016] In the figure, 1. pulley, 2. moving wheel, 21. adsorption surface, 3. planetary gear, 41. iron core, 42. coil, 5. return spring, 6. low-speed contact surface, 7. high-speed contact surface, 8. rotor shaft, 81. contact ring, 9. generator housing, 10. large gear, 11. small gear. DETAILED DESCRIPTION

[0017] The technical solutions of the embodiments of the present application are clearly and completely described below in conjunction with the drawings of the present application. The described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0018] Embodiment 1

[0019] A variable speed ratio automobile generator of this embodiment, such as Figure 1As shown, the entire variable speed generator is connected to the engine driving wheel through a pulley 1. The installation and maintenance of the automobile generator of this embodiment are the same as those of an ordinary generator, and no additional transmission device is added. The specific structure of the generator includes a generator housing 9, a rotor shaft 8 arranged inside the generator housing 9, and a moving wheel 2 and a planetary wheel 3 installed on the rotor shaft 8; one side of the pulley 1 is meshed with the inner gear ring on one side of the moving wheel 2 inside the generator housing 9 through the outer gear ring, and an electromagnetic control device is arranged inside the generator housing 9 and between the pulley 1 and the moving wheel 2. The electromagnetic control device is used to control the axial displacement of the moving wheel 2 on the rotor shaft 8. Its structure includes an iron core 41 formed inside the housing, a coil 42 wound around the outer periphery of the iron core 41, and a moving iron as a moving iron. The structure of the moving wheel 2 includes, in addition to the meshing portion with the pulley 1, an adsorption surface 21 arranged opposite to the iron core 41, a low-speed contact surface 6 matched with the rotor shaft 8, and a high-speed contact surface 7 matched with the planetary gear 3; the rotor shaft 8 is provided with a contact ring 81, the contact ring 81 is arranged opposite to the low-speed contact surface 6 of the moving wheel 2, and the matching surfaces of the two are provided with a plug-in concave-convex interlocking structure, the high-speed contact surface 7 of the moving wheel 2 is arranged opposite to the end face of the planetary gear 3, and the matching surfaces of the two are also provided with a plug-in concave-convex interlocking structure. A reset spring 5 is pressed on one side of the moving wheel 2, the reset spring 5 acts on one side of the moving wheel 2 and keeps the tendency of pressing the high-speed contact surface 7 of the moving wheel 2 toward the planetary gear 3, the planetary gear includes a large gear 10 and a plurality of small gears 11 meshed and transmitted inside the large gear 10, and the rotor shaft 8 is connected to the central small gear of the planetary gear.

[0020] The working process of the variable speed ratio automobile generator of this embodiment is as follows:

[0021] When the vehicle is operating normally, the engine is in a low speed state, the coil 42 is energized, and under the action of magnetic force, the low speed contact surface 6 of the moving wheel 2 is connected to the contact ring 81 of the rotor shaft 8. At this time, the transmission path is: the pulley 1 drives the moving wheel 2 to rotate in a one-to-one ratio, and the moving wheel 2 drives the rotor shaft 8 to rotate in a one-to-one ratio through the low speed contact surface 6. The pressure of the low speed contact surface 6 is generated by the magnetic force generated by the coil 4 being energized to attract the moving wheel 2. At this time, the pulley and the rotor rotate in a 1:1 ratio.

[0022] When the vehicle needs to increase the generator speed, the coil 4 is de-energized, and the reset spring 5 acts on the moving wheel 2, forcing the high-speed contact surface 7 of the moving wheel 2 to be pressed and connected to the end surface of the planetary gear 3. At this time, the transmission path is: the pulley 1 drives the moving wheel 2 in a one-to-one ratio, and the moving wheel 2 drives the large gear 10 of the planetary gear 3 to rotate in a one-to-one ratio through the high-speed contact surface 7. The rotation of the large gear 10 drives the small gear 11 to rotate through the planetary gear. At this time, the speed ratio of the pulley and the rotor shaft is: the number of teeth of the large gear 10 per circle / the number of teeth of the small gear 11 per circle = N. N can be changed by changing the radius of the small gear 11. The rotor shaft 8 rotates N times when the pulley 1 rotates one circle.

[0023] The variable speed generator of the present invention is installed in the same way as an ordinary generator. The engine uses a single belt to drive the variable speed generator to work. The electromagnetic control device controls the variable speed transmission device so that the generator rotor can have two operating states of high speed and low speed. The variable speed transmission device adopts a planetary speed gear, and the rotor is combined with the transmission shaft or the planetary speed gear through the electromagnetic clutch control. Combined with voltage detection and power consumption inspection, a certain algorithm is used to control the variable speed generator, ensuring that the generator can also output the maximum power current to ensure the power consumption of the whole vehicle when the engine is at a low speed.

[0024] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A variable speed ratio automobile generator, which is connected to the engine driving wheel through a pulley, and comprises a generator housing, a rotor shaft disposed inside the generator housing, and a moving wheel and a planetary wheel mounted on the rotor shaft; characterized in that: One side of the pulley is in transmission cooperation with the moving wheel via an electromagnetic control device, and the axial displacement of the moving wheel on the rotor shaft is controlled by the electromagnetic control device; The electromagnetic control device comprises an iron core formed inside the generator housing and a coil wound around the outer circumference of the iron core; The structure of the moving wheel includes: an engaging portion for connecting with the pulley transmission, an adsorption surface for adsorbing and contacting with the iron core when the coil is energized, a low-speed contact surface for cooperating with the rotor shaft transmission when the coil is energized, and a high-speed contact surface for cooperating with the planetary gear transmission when the coil is de-energized.

2. A variable speed ratio automotive generator as claimed in claim 1, characterized in that: A contact ring is installed on the rotor shaft, the low-speed contact surface of the moving wheel is arranged opposite to the contact ring, and a concave-convex interlocking structure is arranged between the two; The high-speed contact surface of the moving wheel is arranged opposite to the end surface of the planetary wheel, and a concave-convex interlocking structure is correspondingly arranged between the two.

3. A variable speed ratio automotive generator as claimed in claim 1, characterized in that: A return spring is press-fitted on one side of the moving wheel. The return spring acts on the moving wheel and always keeps a tendency to press the high-speed contact surface of the moving wheel toward the planetary wheel.

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