Decoupler for automobile generator

Abstract

The present invention relates to a decoupler for an automotive generator. The decoupler comprises a core shaft, a pulley, and a one-way clutch. The one-way clutch comprises an inner sleeve, an outer sleeve, and a torque spring. The inner sleeve is fixedly mounted on the core shaft and provided with a first stop. The outer sleeve is rotatably mounted on the outer sleeve, and a second stop protrudes from the outer sleeve. The pulley is fixedly mounted on the outer sleeve, and the torque spring is mounted between the inner sleeve and the outer sleeve. The opposite ends of the helical wire abut against the first stop and the second stop, respectively. The decoupler can reduce torque vibration.

Description

Technical Field

[0001] The invention relates to a decoupler for an automobile generator. Background Art

[0002] The auxiliary device of an automotive alternator typically includes a core shaft, a pulley, and a belt. The pulley is mounted on the core shaft, and the belt is mounted on the pulley. The belt drives the core shaft through the pulley. However, when the belt speed fluctuates, the core shaft is prone to torque vibration, affecting the performance of the alternator. Summary of the Invention

[0003] Based on this, it is necessary to provide a decoupler for automobile generators that is convenient for reducing torque vibration.

[0004] The one-way clutch is configured to have an inner sleeve, an outer sleeve and a torsion spring, wherein the inner sleeve is fixedly mounted on the inner sleeve, a first stop portion is provided on the inner sleeve, the outer sleeve is rotatably mounted on the outside of the inner sleeve, a second stop portion is convexly provided on the outer sleeve, the pulley is fixedly mounted on the outside of the outer sleeve, the torsion spring is installed between the inner sleeve and the outer sleeve, the opposite ends of the spiral line are respectively abutted against the first stop portion and the second stop portion, when the rotation speed of the pulley is greater than the rotation speed of the core shaft, the torsion spring is compressed to make the core shaft rotate synchronously with the pulley, and when the rotation speed of the pulley is less than the rotation speed of the core shaft, the torsion spring returns to its original state to disconnect the power transmission between the core shaft and the pulley.

[0005] In one embodiment, a line connecting the first stopping portion and the second stopping portion passes through the center of the one-way clutch.

[0006] In one embodiment, the inner sleeve includes a first sleeve and a first retaining ring, the first sleeve is fixedly mounted on the core shaft, the first retaining ring is protruded from the periphery of one end of the first sleeve, and the first stop portion is formed on the first retaining ring.

[0007] In one embodiment, the outer sleeve includes a second sleeve and a second retaining ring, the second sleeve is wrapped around the periphery of the first sleeve, the second retaining ring is protruded from the periphery of one end of the second sleeve, and the second stop portion is formed on the first retaining ring.

[0008] In one embodiment, the first retaining ring extends radially outward from the end periphery of the first sleeve, and the outer periphery of the first retaining ring is rotatably abutted against the inner periphery of the second sleeve. The second retaining ring extends radially inward from the end periphery of the second sleeve, and the inner periphery of the second retaining ring is rotatably abutted against the outer periphery of the first sleeve.

[0009] In one embodiment, the first shift ring and the second shift ring are located at opposite ends of the one-way clutch.

[0010] In one embodiment, the first retaining ring partially protrudes toward the second retaining ring to form the first stop portion, and a first groove is formed on the side of the first retaining portion facing away from the second retaining ring. The second retaining ring partially protrudes toward the first retaining ring to form the second stop portion, and a second groove is formed on the side of the second retaining portion facing away from the first retaining ring.

[0011] In one embodiment, the first stop portion includes an inclined plate portion, a circumferential plate portion and an axial plate portion connected in sequence, the inclined plate portion extends obliquely toward the second retaining ring, the circumferential plate portion extends along the circumference of the first sleeve, and the axial plate portion extends along the axial direction of the first sleeve.

[0012] In one embodiment, the axial plate portion is perpendicular to the circumferential plate portion, a stop surface is formed on the axial plate portion, the stop surface is perpendicular to the circumference of the first sleeve, and the end of the torque spring is abutted against the stop surface.

[0013] In one embodiment, the torque spring is a coil spring, which includes a coil main body and two arc ends, wherein the two arc ends are respectively formed at opposite ends of the coil main body, and the two arc ends are respectively abutted against the first stop portion and the second stop portion.

[0014] During use, a belt is mounted on the pulley, which serves as a power input component. When the pulley's rotational speed exceeds that of the spindle, the torque spring compresses, causing the spindle to rotate synchronously with the pulley. When the pulley's rotational speed decreases, the torque spring returns to its original position, disconnecting the power transmission between the spindle and the pulley, making the spindle a power output component. The pulley rotates the spindle via the one-way clutch. With this arrangement, when the pulley's speed decreases sharply, the spindle is not restrained by the pulley and decelerated rapidly. Instead, it is freed from the pulley and maintains a stable operating speed, thereby reducing torque vibration. For example, this decoupler can be installed on an auxiliary device of a belt-driven generator in a vehicle's engine. This decoupler allows the auxiliary device to temporarily operate at a speed different from the belt speed. This decoupler can increase the service life of a vehicle's drivetrain, reduce its cost, reduce its complexity, and simplify its manufacture, thereby improving the vehicle's fuel economy. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The figure is a perspective schematic diagram of a decoupler for an automobile generator according to one embodiment.

[0016] Figure 2 for Figure 1 A perspective schematic diagram of a decoupler for an automotive alternator after removing the pulley is shown.

[0017] Figure 3 2 is a perspective schematic diagram of a one-way clutch according to an embodiment.

[0018] Figure 4 for Figure 3 A partial enlarged view of point A in the middle. DETAILED DESCRIPTION

[0019] To facilitate understanding of the present invention, the present invention will be described more fully below with reference to the accompanying drawings. The accompanying drawings illustrate preferred embodiments of the present invention. However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the present disclosure.

[0020] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly attached to the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one skilled in the art to which this invention pertains. The terms used herein are for the purpose of describing specific embodiments only and are not intended to limit the present invention. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0022] The present invention relates to a decoupler for automobile generators. For example, the decoupler for automobile generators includes a core shaft, a pulley and a one-way clutch, the one-way clutch includes an inner sleeve, an outer sleeve and a torque spring, and the inner sleeve is fixedly sleeved on the core shaft. For example, the inner sleeve is provided with a first stopper, the outer sleeve is rotatably sleeved on the outside of the inner sleeve, the outer sleeve is convexly provided with a second stopper, and the pulley is fixedly sleeved on the outside of the outer sleeve. For example, the torque spring is installed between the inner sleeve and the outer sleeve, and the opposite ends of the spiral line are respectively abutted against the first stopper and the second stopper. For example, when the rotation speed of the pulley is greater than the rotation speed of the core shaft, the torque spring is compressed to make the core shaft rotate synchronously with the pulley. For example, when the rotation speed of the pulley is less than the rotation speed of the core shaft, the torque spring returns to its original state to disconnect the power transmission between the core shaft and the pulley.

[0023] See also Figures 1 to 3 A decoupler for an automotive generator includes a core shaft 10, a pulley 20, and a one-way clutch 30. The one-way clutch 30 includes an inner bushing 31, an outer bushing 33, and a torque spring 35. The inner bushing 31 is fixedly mounted on the core shaft 10. The inner bushing 31 is provided with a first stopper 313. The outer bushing 33 is rotatably mounted on the outer side of the inner bushing 31. The outer bushing 33 is protrudingly provided with a second stopper 333. The pulley 20 is fixedly mounted on the outer side of the outer bushing 33. The torque spring 35 is installed between the inner sleeve 31 and the outer sleeve 33, and the opposite ends of the spiral line are respectively abutted against the first stop portion 313 and the second stop portion 333. When the rotation speed of the pulley 20 is greater than the rotation speed of the core shaft 10, the torque spring 35 is compressed to make the core shaft 10 rotate synchronously with the pulley 20. When the rotation speed of the pulley 20 is less than the rotation speed of the core shaft 10, the torque spring 35 returns to its original state to disconnect the power transmission between the core shaft 10 and the pulley 20.

[0024] For example, during use, a belt is mounted on pulley 20, with pulley 20 serving as the power input component. When the speed of pulley 20 exceeds that of spindle 10, torque spring 35 compresses, causing spindle 10 to rotate synchronously with pulley 20. When the speed of pulley 20 decreases, torque spring 35 returns to its original position, disconnecting the power transmission between spindle 10 and pulley 20. Spindle 10 serves as the power output component. Pulley 20 drives spindle 10 to rotate via one-way clutch 30. This arrangement prevents pulley 20 from being dragged down by pulley 20 and causing a sudden deceleration. Instead, spindle 10 is freed from pulley 20 and maintains a stable operating speed, thereby reducing torque vibration. For example, this decoupler can be installed on an auxiliary device of a belt-driven generator in a vehicle engine. This decoupler allows the auxiliary device to temporarily operate at a speed different from the belt speed. Such a decoupler can increase the operating life of vehicle drive trains, reduce their cost, reduce their complexity and simplify their manufacture, and thereby improve the fuel economy of the vehicle.

[0025] For example, to facilitate compression or release of the torque spring 35, the line connecting the first stopper 313 and the second stopper 333 passes through the center of the one-way clutch 30. The inner sleeve 31 includes a first sleeve 311 and a first retaining ring 312. The first sleeve 311 is fixedly mounted on the core shaft 10. The first retaining ring 312 protrudes from one end of the first sleeve 311. The first stopper 313 is formed on the first retaining ring 312. The outer sleeve 33 includes a second sleeve 331 and a second retaining ring 332. The second sleeve 331 surrounds the outer periphery of the first sleeve 311. The second retaining ring 332 protrudes from one end of the second sleeve 331. The second stopper 333 is formed on the first retaining ring 312. The first retaining ring 312 extends radially outward from the end periphery of the first sleeve 311. The outer periphery of the first retaining ring 312 rotatably abuts the inner periphery of the second sleeve 331. The second retaining ring 332 extends radially inward from the end periphery of the second sleeve 331. The inner periphery of the second retaining ring 332 rotatably abuts the outer periphery of the first sleeve 311. The first retaining ring 312 and the second retaining ring 332 are located at opposite ends of the one-way clutch 30. By arranging the line connecting the first stopper 313 and the second stopper 333 through the center of the one-way clutch 30, the first stopper 313 and the second stopper 333 are symmetrically arranged, thereby facilitating the use of the first stopper 313 and the second stopper 333 to compress or release the opposite ends of the torque spring 35.

[0026] For example, in order to facilitate the pressing of the first stopper 313 and the second stopper 333, please refer to Figure 4The first retaining ring 312 partially protrudes toward the second retaining ring 332 to form a first stopper 313. A first groove 3135 is formed on the side of the first retaining ring 313 facing away from the second retaining ring 332. The second retaining ring 332 partially protrudes toward the first retaining ring 312 to form a second stopper 333. A second groove 3335 is formed on the side of the second retaining ring 333 facing away from the first retaining ring 312. The first retaining portion 313 includes an inclined plate portion 314, a circumferential plate portion 315, and an axial plate portion 316 connected in sequence. The inclined plate portion 314 extends obliquely toward the second retaining ring 332, the circumferential plate portion 315 extends along the circumference of the first sleeve 311, and the axial plate portion 316 extends along the axial direction of the first sleeve 311. The axial plate portion 316 is perpendicular to the circumferential plate portion 315. A stop surface 3165 is formed on the axial plate portion 316. The stop surface 3165 is perpendicular to the circumference of the first sleeve 311, and the end of the torque spring 35 abuts against the stop surface 3165. The torque spring 35 is a helical spring comprising a helical main portion 351 and two arcuate end portions 355. The two arcuate end portions 355 are formed at opposite ends of the helical main portion 351 and abut against the first stop portion 313 and the second stop portion 333, respectively. The provision of two arcuate end portions 355 facilitates the use of the two arcuate end portions to press against the first stop portion 313 and the second stop portion 333, respectively. The core shaft 10 is also provided with two bearings 18, located at opposite ends of the one-way clutch 20. The pulley 30 is sleeved on these two bearings 18. The structure of the second stopping portion is the same as that of the first stopping portion.

[0027] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0028] The above-described embodiments merely represent several embodiments of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A decoupler for an automobile generator, characterized in that: The one-way clutch comprises an inner sleeve, an outer sleeve and a torque spring, the inner sleeve is fixedly mounted on the inner shaft, a first stop portion is provided on the inner sleeve, the outer sleeve is rotatably mounted on the outside of the inner sleeve, a second stop portion is convexly provided on the outer sleeve, the pulley is fixedly mounted on the outside of the outer sleeve, the torque spring is installed between the inner sleeve and the outer sleeve, the torque spring is a helical spring, and the opposite ends of the helical spring respectively abut against the first stop portion and the second stop portion, when the rotation speed of the pulley is greater than the rotation speed of the core shaft, the torque spring is compressed to make the core shaft rotate synchronously with the pulley, and when the rotation speed of the pulley is less than the rotation speed of the core shaft, the The torsion spring returns to its original shape to disconnect the power transmission between the core shaft and the pulley, and the inner sleeve includes a first sleeve and a first retaining ring, the first sleeve is fixedly mounted on the core shaft, the first retaining ring is protruded on the periphery of one end of the first sleeve, and the first stop portion is formed on the first retaining ring, the first stop portion includes an inclined plate portion, a circumferential plate portion and an axial plate portion connected in sequence, the inclined plate portion extends obliquely toward the second retaining ring of the outer sleeve, the circumferential plate portion extends along the circumference of the first sleeve, the axial plate portion extends along the axial direction of the first sleeve, the axial plate portion is perpendicular to the circumferential plate portion, a stop surface is formed on the axial plate portion, the stop surface is perpendicular to the circumference of the first sleeve, and the end of the torque spring is abutted against the stop surface.

2. The decoupler for automobile generator according to claim 1, characterized in that: A line connecting the first stopping portion and the second stopping portion passes through the center of the one-way clutch.

3. The decoupler for automobile generator according to claim 1, characterized in that: The outer sleeve includes a second sleeve and a second retaining ring. The second sleeve is wrapped around the periphery of the first sleeve. The second retaining ring is protruded from the periphery of one end of the second sleeve. The second stop portion is formed on the first retaining ring.

4. The decoupler for automobile generator according to claim 3, characterized in that: The first retaining ring extends radially outward from the end periphery of the first sleeve, and the outer periphery of the first retaining ring is rotatably abutted against the inner periphery of the second sleeve. The second retaining ring extends radially inward from the end periphery of the second sleeve, and the inner periphery of the second retaining ring is rotatably abutted against the outer periphery of the first sleeve.

5. The decoupler for automobile generator according to claim 4, characterized in that: The first shift ring and the second shift ring are respectively located at two opposite ends of the one-way clutch.

6. The decoupler for automobile generator according to claim 5, characterized in that: The first retaining ring partially protrudes toward the second retaining ring to form the first stop portion, and the first stop portion is formed with a first groove on a side away from the second retaining ring. The second retaining ring partially protrudes toward the first retaining ring to form the second stop portion, and the second stop portion is formed with a second groove on a side away from the first retaining ring.

7. The decoupler for automobile generator according to claim 1, characterized in that: The coil spring includes a coil main body and two arc ends, the two arc ends are respectively formed at opposite ends of the coil main body, and the two arc ends are respectively abutted against the first stop portion and the second stop portion.

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