A flywheel gear ring structure with a fixed-point split gear ring and an application method thereof

Abstract

The present invention discloses a flywheel gear ring structure with a split gear ring at a fixed point and an application method, comprising a starter drive gear, a starter drive gear telescopic control system and a flywheel, and also comprising a split gear ring, wherein a plurality of the split gear rings are evenly distributed on the flywheel in a detachable manner; and a plurality of flywheel tightening holes are also provided on the flywheel. The present invention and method can achieve the effects of low difficulty in service and maintenance, low cost, low toothing / scratching of the flywheel gear ring, and good reliability.

Description

Technical Field

[0001] The invention relates to the technical field of engine flywheels, and in particular to a flywheel gear ring structure with a fixed-point split gear ring and an application method. Background Art

[0002] The flywheel and ring gear assembly of the engine mainly serve as a kinetic energy storage device, which assists the engine start, keeps the crankshaft running evenly, and stabilizes the crankshaft speed. The flywheel ring gear should be able to reliably transmit the output torque of the starter motor, drive the crankshaft to rotate and start the engine. Once the flywheel ring gear cannot reliably transmit the output torque of the starter, the engine will be difficult to start. Or even impossible to start. Therefore, the flywheel and ring gear assembly play an important role in ensuring the normal operation of the engine.

[0003] The existing flywheel and gear ring assembly is mainly composed of two parts, the flywheel and the gear ring, which are heated to achieve interference fit and press-fit, and the gear ring is a complete ring. However, during the operation of the starter, there is an impact of gear meshing during the extension and retraction of the starter drive gear, so the flywheel gear ring may be knocked and swept. After frequent starts and stops, the life of the flywheel gear ring is shortened. In addition, the replacement of the flywheel gear ring requires heating to achieve interference fit for installation, which has very strict process requirements and cannot be repaired without special equipment. Therefore, the entire flywheel and gear ring assembly can only be replaced, which is difficult and costly to service.

[0004] The disclosure of the above background technology content is only used to assist in understanding the concept and technical solution of the present invention. It does not necessarily belong to the prior art of this patent application. In the absence of clear evidence that the above content has been disclosed on the filing date of this patent application, the above background technology should not be used to evaluate the novelty and creativity of the present application. Summary of the invention

[0005] In view of the above technical problems, the present invention provides a fixed-point belt split gear ring flywheel gear ring structure and an application method which has low service and maintenance difficulty, low cost, is not prone to tooth striking / scratching, and has good reliability.

[0006] To achieve the above object, the present invention adopts the following technical solution:

[0007] A flywheel gear ring structure with a fixed-point split gear ring comprises a starter drive gear, a starter drive gear telescopic control system and a flywheel, and also comprises a split gear ring, wherein a plurality of the split gear rings are detachably and evenly distributed on the flywheel; and a plurality of flywheel tightening holes are also provided on the flywheel.

[0008] Furthermore, it also includes a driven gear, which is distributed between the starter drive gear and the split ring gear of the flywheel.

[0009] Furthermore, the flywheel is detachably and evenly provided with two split gear rings, and the two split gear rings are distributed at 180 degrees.

[0010] Furthermore, the flywheel is detachably and evenly provided with three split gear rings, and the three split gear rings are distributed at 120 degrees.

[0011] Furthermore, the split gear ring includes 10-15 teeth.

[0012] Furthermore, a protruding rod is provided at each of the two ends of the inner side of the split gear ring, and a positioning tightening hole is provided in the middle thereof; the flywheel is provided with two protruding rod insertion holes and a bolt tightening hole corresponding to the split gear ring; and the split gear ring is tightened to the flywheel correspondingly by means of positioning bolts.

[0013] Furthermore, positioning holes are provided between the flywheel tightening holes.

[0014] An application method of the flywheel ring gear structure using the fixed-point belt split ring gear as described above comprises the following steps:

[0015] (1) Ensure that the engine is in a stopped state, select the flywheel according to the number of cylinder strokes of the engine, and then ensure that the middle position of one of the split gear rings is engaged with the driven gear; mark the upper end, middle part and lower section of the split gear ring on the flywheel as point A, point B and point C respectively;

[0016] (2) Before the engine is started, one of the split ring gears on the flywheel is in meshing state with the driven gear, i.e., near point B at this time. Then, when the engine is started, the motor drive gear extension and retraction control system controls the starter drive gear to extend and drive the driven gear, thereby driving the split ring gear to rotate;

[0017] (3) When the point C rotates to the driven gear, the motor drive gear extension and retraction control system controls the starter drive gear to retract, and then after the point A of the next split gear ring rotates to the driven gear, the motor drive gear extension and retraction control system controls the starter drive gear to extend and drive the driven gear, thereby providing driving force for the split gear ring to rotate again; then, when the point C of the split gear ring rotates to the driven gear, the motor drive gear extension and retraction control system controls the starter drive gear to retract, and this cycle is repeated until the engine is successfully started, and then the starter drive gear is retracted;

[0018] (4) After the engine is shut down, one of the cylinders must stop at the piston top dead center because the resistance at the piston top dead center is the largest. At this time, one of the split ring gears and the driven gear will remain in meshing state and near point B.

[0019] The beneficial effects of the present invention compared with the prior art are as follows:

[0020] (1) The flywheel gear ring structure of the present invention can significantly reduce the occurrence of tooth hitting and tooth sweeping of the flywheel gear ring by adopting a split gear ring; at the same time, by combining with the method of adding a driven gear, the creative use of intermittent drive is achieved (the starter drive gear is extended to drive when the engine is started in the traditional way, and retracts after the start is completed. However, during each start-stop process, the starter drive gear is very likely to have tooth hitting and tooth sweeping with the flywheel gear ring. Over time, it will naturally wear out and cause the flywheel gear ring to slip and fail to start the engine after a period of use. Therefore, for traditional flywheels, the success rate of each start is generally improved, the number of starts is reduced, and the extension and retraction frequency of the starter drive gear is reduced, thereby reducing the number of tooth hitting and tooth sweeping to increase the service life of the flywheel gear ring). The present application is based on the use of a split gear ring and a driven gear design. During each start, the starter drive gear is continuously extended and retracted multiple times to ensure the continuous driving force and ensure the effective start of the engine. At the same time, the occurrence of tooth hitting and tooth sweeping of the split gear ring is effectively reduced, and the service life is significantly extended. Moreover, when replacement is required, it is convenient to replace at a lower cost and has a good use effect.

[0021] (2) The application method of the present invention can effectively prevent the driven gear and the split gear ring from hitting or sweeping teeth (when the driven gear and the split gear ring are out of sync, the driven gear and the starter drive gear are in a separated state, and the split gear ring will naturally not be damaged), thereby increasing the service life of the flywheel. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the flywheel and the split gear ring combined in the present invention;

[0023] Figure 2 It is a schematic diagram of the inner structure of the split gear ring of the present invention;

[0024] Figure 3 It is a schematic diagram of the outer structure of the split gear ring of the present invention;

[0025] Figure 4 It is a schematic diagram of the structure of the flywheel of the present invention after the split gear ring is disassembled;

[0026] Figure 5 It is a schematic diagram of the structure of the flywheel, driven gear and starter drive gear after assembly of the present invention. DETAILED DESCRIPTION

[0027] A flywheel gear ring structure with a fixed-point split gear ring, comprising a starter drive gear 5, a starter drive gear telescopic control system, a driven gear 4 and a flywheel 1, wherein the flywheel 1 is detachably and evenly provided with a plurality of split gear rings 2; in this embodiment, two split gear rings 2 or three split gear rings 2 are provided corresponding to the type of engine, if two split gear rings 2 are provided, they are distributed at 180 degrees, corresponding to a four-cylinder engine (such as an in-line four-stroke four-cylinder engine); if three split gear rings 2 are provided, the three split gear rings 2 are distributed at 120 degrees, corresponding to a six-cylinder engine (such as an in-line six-cylinder four-stroke engine). This is mainly to ensure that one of the split gear rings 2 can mesh with the driven gear 4 after shutdown. The split gear ring 2 of this embodiment may contain 10-15 teeth or preferably 12 teeth. During connection, this embodiment provides a protruding rod 2-1 at each of the two ends of the inner side of the split gear ring 2, and a positioning tightening hole 2-2 is opened in the middle; then two protruding rod insertion holes 1-4 and a bolt tightening hole 1-3 are opened on the flywheel 1 corresponding to the split gear ring; the split gear ring 2 is tightened to the flywheel 1 by the positioning bolts, of course, using interference fit connection. The flywheel 1 is also provided with a plurality of flywheel tightening holes 1-2, and positioning holes 1-1 are also provided between the flywheel tightening holes for easy installation and positioning. The driven gear 4 is distributed between the starter drive gear 5 and the split gear ring 2 of the flywheel 1.

[0028] An application method of the flywheel ring gear structure using the fixed-point belt split ring gear as described above comprises the following steps:

[0029] (1) Ensure that the engine is in a stopped state, select the flywheel according to the number of cylinder strokes of the engine, and then ensure that the middle position of one of the split gear rings is engaged with the driven gear; mark the upper end, middle part and lower section of the split gear ring on the flywheel as point A, point B and point C respectively;

[0030] (2) Before the engine is started, one of the split ring gears on the flywheel is in meshing state with the driven gear, i.e., near point B at this time. Then, when the engine is started, the motor drive gear extension and retraction control system controls the starter drive gear to extend and drive the driven gear, thereby driving the split ring gear to rotate (i.e., driving the flywheel 1 to rotate);

[0031] (3) When the point C rotates to the driven gear, the motor drive gear extension and retraction control system controls the starter drive gear to retract (i.e., the driven gear retracts after being separated from the split gear ring), and then after the next point A of the split gear ring rotates to the driven gear (before contacting point A, the starter drive gear and the driven gear are in a separated state), the motor drive gear extension and retraction control system controls the starter drive gear to extend (at this time, the driven gear and the split gear ring are already meshed) to drive the driven gear, thereby providing driving force for the split gear ring to rotate again; then, when the point C of the split gear ring rotates to the driven gear, the motor drive gear extension and retraction control system controls the starter drive gear to retract, and this cycle is repeated until the engine is successfully started, and then the starter drive gear retracts;

[0032] (4) After the engine is shut down, one of the cylinders must stop at the piston top dead center because the resistance at the piston top dead center is the largest. At this time, one of the split ring gears and the driven gear will remain in meshing state and near point B.

[0033] In terms of the expansion and contraction of the key nodes related to the starter drive gear, a sensing device can be installed on the flywheel or the relevant signals can be directly obtained from the valve control data on the engine or the movement law of the camshaft to achieve control. Because these are conventional existing technical means in this field, they will not be elaborated on in detail. Because when the piston reaches the top dead center in the cylinder of the engine, it just corresponds to the driven gear being engaged near the point B of the split gear ring, and then the above control can be easily achieved by conventional means by combining the specifications of the split gear ring used on the actual model. (In addition to the above-listed methods of obtaining relevant signals, other methods not described, such as simply using the existing technology to make a simple replacement to achieve the above control purpose, but because the above-mentioned application method innovatively adopted by this application should also belong to the protection scope of this application, or the control reference point of the present invention-the top dead center of the piston, is simply replaced with the bottom dead center of the piston in the control / algorithm, which also belongs to the protection scope of this application).

Claims

1. An application method of a flywheel gear ring structure with a fixed-point split gear ring, the flywheel gear ring structure comprising a starter drive gear, a starter drive gear telescopic control system and a flywheel, characterized in that: The flywheel gear ring structure also includes a split gear ring and a driven gear. The flywheel is detachably and evenly provided with a plurality of split gear rings. The flywheel is also provided with a plurality of flywheel tightening holes. The driven gear is distributed between the starter drive gear and the split gear ring of the flywheel. The application method comprises the following steps: (1) Ensure that the engine is in a stopped state, select the flywheel according to the number of cylinder strokes of the engine, and then ensure that the middle position of one of the split gear rings is engaged with the driven gear; mark the upper end, middle part and lower section of the split gear ring on the flywheel as point A, point B and point C respectively; (2) Before the engine is started, one of the split ring gears on the flywheel is in meshing state with the driven gear, i.e., near point B at this time. Then, when the engine is started, the motor drive gear extension and retraction control system controls the starter drive gear to extend and drive the driven gear, thereby driving the split ring gear to rotate; (3) When the point C rotates to the driven gear, the motor drive gear extension and retraction control system controls the starter drive gear to retract, and then after the point A of the next split gear ring rotates to the driven gear, the motor drive gear extension and retraction control system controls the starter drive gear to extend and drive the driven gear, thereby providing driving force for the split gear ring to rotate again; Then, when point C of the split gear ring rotates to the driven gear, the engine drive gear extension and retraction control system controls the starter drive gear to retract, and this cycle continues until the engine is successfully started, and then the starter drive gear retracts; (4) After the engine is shut down, one of the cylinders must stop at the piston top dead center because the resistance at the piston top dead center is the largest. At this time, one of the split ring gears and the driven gear will remain in meshing state and near point B.

2. The application method of the flywheel gear ring structure with a fixed-point split gear ring according to claim 1 is characterized in that: The flywheel is detachably and evenly provided with two split gear rings, and the two split gear rings are distributed at 180 degrees.

3. The application method of the flywheel ring gear structure with a fixed-point split ring gear according to claim 1 is characterized in that: The flywheel is detachably and evenly provided with three split gear rings, and the three split gear rings are distributed at 120 degrees.

4. The application method of the flywheel gear ring structure with a fixed-point split gear ring according to claim 1 is characterized in that: The split gear ring includes 10 to 15 teeth.

5. The application method of the flywheel gear ring structure with a fixed-point split gear ring according to claim 1 is characterized in that: The inner ends of the split gear ring are each provided with a protruding rod, and a positioning tightening hole is opened in the middle; the flywheel is provided with two protruding rod insertion holes and a bolt tightening hole corresponding to the split gear ring; the split gear ring is tightened to the flywheel correspondingly by the positioning bolts.

6. The application method of the flywheel gear ring structure with a fixed-point split gear ring according to claim 1 is characterized in that: Positioning holes are also provided between the flywheel tightening holes.

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