Concentric flywheel of internal combustion engine

Abstract

The concentric flywheel comprises a flywheel body, an electric disc, a permanent magnet and a control assembly. The flywheel and the electric disc are both connected to a crankshaft of an engine in a sleeving mode. A mounting groove is formed in one end, far away from the blades, of the flywheel, and the permanent magnet is embedded in the mounting groove; the control assembly is installed on the electric disc and suitable for generating a magnetic field used for being matched with the flywheel. The concentric flywheel has the beneficial effects that compared with an existing concentric flywheel, the installation groove is formed, so that the permanent magnet can be stably installed on the flywheel, the internal structure of the flywheel is simpler, the weight of the whole machine is reduced, and meanwhile the installation efficiency is remarkably improved; the control assembly enables the magnetic induction iron core and the controller to be combined into a whole, and installation is more convenient.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of flywheel, in particular to a concentric flywheel of internal combustion engine. BACKGROUND

[0002] The main function of the concentric flywheel of internal combustion engine is to balance the rotation speed of the engine, complete the auxiliary stroke, store and release energy, and reduce vibration and noise. The permanent magnet arranged inside is the core component to play the function, and the magnetic field of the permanent magnet can form an ignition system with the magneto component. However, the existing flywheel has a relatively complex structure, uses two permanent magnets and large and small level palms for splicing, which increases the cost of materials, the weight of the whole machine, and the installation efficiency is also relatively low.

[0003] Meanwhile, in the prior art, the controller, the magnet core and the inductor and other components in the concentric flywheel are dispersedly arranged on the electric disc, so that the installation of the above components is not convenient, and then the installation efficiency of the whole concentric flywheel is affected.

[0004] Therefore, it is necessary to improve the existing concentric flywheel. CONTENT OF THE INVENTION

[0005] The present application aims to provide a concentric flywheel which can solve at least one defect in the background art.

[0006] In order to achieve the above at least one purpose, the technical scheme adopted by the present application is as follows: a concentric flywheel of internal combustion engine, comprising a flywheel, an electric disc, a permanent magnet and a control assembly; the flywheel and the electric disc are sleeved on the crankshaft of the engine; the flywheel is provided with a mounting groove at one end away from the blade, and the permanent magnet is inlaid and mounted in the mounting groove; the control assembly is mounted on the electric disc, and the control assembly is adapted to generate a magnetic field for cooperating with the flywheel.

[0007] Preferably, the size of the mounting groove towards one side of the center of the flywheel is smaller than the size of the side away from the center of the flywheel.

[0008] Preferably, the mounting groove has one.

[0009] Preferably, the mounting groove has a plurality of mounting grooves, and the mounting grooves are spaced apart along the circumferential direction of the flywheel; the permanent magnet and the mounting grooves correspond in shape and are equal in number.

[0010] Preferably, the control assembly comprises a controller, a magnet core and a winding; the controller is fixedly mounted on the electric disc; the magnet core is arranged in the housing of the controller, and the magnet end of the magnet core extends out of the housing; the winding is arranged in the housing of the controller and is sleeved on the magnet core, so that the controller, the magnet core and the winding form an integral whole.

[0011] Preferably, the magnet attracting end is provided with a pair of arc surfaces, and the arc surfaces of the pair of magnet attracting ends are provided with the same center.

[0012] Preferably, the permanent magnet is adapted to be connected with the mounting groove through interference fit or transition fit.

[0013] Preferably, the permanent magnet is adapted to be connected with the mounting groove through interference fit or transition fit.

[0014] Compared with the prior art, the application has the beneficial effects that:

[0015] Compared with the prior art, the application has the beneficial effects that: BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a whole structure schematic view of the flywheel and the electric disc in the application.

[0017] Figure 2 It is a structure schematic view of the mounting groove in the application.

[0018] Figure 3 It is a structure schematic view of the permanent magnet mounted in the mounting groove in the application.

[0019] Figure 4 It is a structure schematic view of the control assembly mounted on the electric disc in the application.

[0020] Figure 5 It is a structure schematic view of the magnet attracting end of the magnet attracting core extending out of the controller shell in the application.

[0021] Figure 6 It is a simple schematic view of the first arc segment size being greater than the second arc segment size in the embodiment.

[0022] Figure 7 It is a simple schematic view of the first arc segment size being equal to the second arc segment size in the embodiment.

[0023] Figure 8 It is a simple schematic view of the first arc segment size being less than the second arc segment size in the embodiment.

[0024] In the figure: flywheel 1, mounting groove 10, first arc segment 101, second arc segment 102, electric disc 2, permanent magnet 3, control assembly 4, controller 40, magnet guide core 41, magnet guide end 410, crankshaft 5, bearing 6. DETAILED DESCRIPTION

[0025] Hereinafter, the present application will be further described in conjunction with specific embodiments. It should be noted that the following described embodiments or technical features can be combined with each other to form new embodiments without conflict.

[0026] In the description of the present application, it should be noted that for orientation words, such as the terms "center", "transverse", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation and positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and cannot be understood as limiting the specific protection scope of the present application.

[0027] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and do not necessarily describe a specific order or sequence.

[0028] The terms "include" and "have" and any variations thereof in the specification and claims of the present application are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device that includes a series of steps or units does not have to be limited to only those steps or units clearly listed, but can include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0029] One preferred embodiment of the present application, as shown in Figures 1 to 8 A concentric flywheel of an internal combustion engine, including a flywheel 1, an electric disc 2, a permanent magnet 3, and a control assembly 4. The flywheel 1 and the electric disc 2 are both sleeved on the crankshaft 5 of the engine. The flywheel 1 is provided with a mounting groove 10 at the end away from the blades, and the permanent magnet 3 is embeddedly installed in the mounting groove 10. The control assembly 4 is installed on the electric disc 2, and the control assembly 4 can generate a magnetic field for cooperating with the flywheel 1.

[0030] It should be known that the concentric flywheel is a part of the engine crankshaft 5; the flywheel 1 and the electric disc 2 in the concentric flywheel are sleevedly installed on the crankshaft 5, the flywheel 1 and the crankshaft 5 are detachably fixedly installed, the electric disc 2 is fixedly installed through threaded connection and external parts to ensure that the electric disc 2 can remain stationary when the crankshaft 5 rotates; the engine starts, the crankshaft 5 rotates to drive the flywheel 1 to rotate relative to the electric disc 2.

[0031] In the prior art, the flywheel 1 is provided with permanent magnets 3, the number of the permanent magnets 3 is multiple and the volume of the permanent magnets 3 is large; the electric disc 2 is provided with a winding and a pair of magnet attracting cores 41, the pair of magnet attracting cores 41 are installed at two ends of the winding, the winding and the pair of magnet attracting cores 41 form a charging coil. The flywheel 1 rotates relative to the electric disc 2 with the rotation of the crankshaft 5, so that the permanent magnets 3 rotate relative to the charging coil, and then cooperate with external parts to form an engine ignition system.

[0032] From the above, the concentric flywheel is very important in the engine; therefore, the concentric flywheel often needs to be checked and replaced to ensure the stable work of the engine. However, in the prior art, the volume of the permanent magnets 3 is large and the installation mode is complicated, which leads to a very complicated replacement process of the flywheel 1 when the flywheel 1 is found to have problems; at the same time, the large volume of the permanent magnets 3 and the complicated installation mode also make the whole concentric flywheel have low installation efficiency when the whole concentric flywheel is installed.

[0033] Therefore, in the embodiment, in order to simplify the replacement process of the flywheel 1 and improve the installation efficiency, as shown in Figure 2 and Figure 3 , the flywheel 1 is provided with an installation groove 10 at an end away from the blade, and the permanent magnets 3 are inlaidly installed in the installation groove 10.

[0034] It can be understood that the installation groove 10 includes a first arc segment 101 away from the center of the flywheel 1 and a second arc segment 102 towards the center of the flywheel 1. The size of the first arc segment 101 and the size of the second arc segment 102, and the size comparison relationship between the two can affect whether the permanent magnets 3 will fall off when the permanent magnets 3 are installed in the installation groove 10 to a certain extent, so there are many specific settings for the comparison relationship between the size of the first arc segment 101 and the size of the second arc segment 102, including but not limited to the following three kinds.

[0035] Size comparison relationship one: as shown in Figure 6 , the arc length size of the first arc segment 101 is greater than the arc length size of the second arc segment 102.

[0036] Size comparison relationship two: as shown in Figure 7 , the arc length size of the first arc segment 101 is equal to the arc length size of the second arc segment 102.

[0037] Size comparison relationship three: as shown in Figure 8As shown, the arc length size of the first arc segment 101 is smaller than the arc length size of the second arc segment 102.

[0038] It should be understood that the above two ways can meet the needs of the present application, and those skilled in the art can choose according to actual needs; in the embodiment, the size comparison relationship one is preferably used.

[0039] For size comparison relationship one: when the arc length size of the first arc segment 101 is greater than the arc length size of the second arc segment 102, as shown in Figure 5 As shown, the mounting groove 10 is inclined from outside to inside on both sides along the circumferential direction of the flywheel 1, so that the mounting groove 10 can limit the permanent magnet 3 on both sides along the circumferential direction of the flywheel 1, and the mounting groove 10 and the permanent magnet 3 are connected by a connecting mode, so that the permanent magnet 3 is installed.

[0040] For size comparison relationship two: when the arc length size of the first arc segment 101 is equal to the arc length size of the second arc segment 102, as shown in Figure 7 As shown, the mounting groove 10 is vertically arranged on both sides along the circumferential direction of the flywheel 1, and the mounting groove 10 and the permanent magnet 3 are connected by a connecting mode, so that the permanent magnet 3 is installed.

[0041] For size comparison relationship three: when the arc length size of the first arc segment 101 is smaller than the arc length size of the second arc segment 102, as shown in Figure 8 As shown, the mounting groove 10 is inclined from inside to outside on both sides along the circumferential direction of the flywheel 1, and the mounting groove 10 and the permanent magnet 3 are connected by a connecting mode, so that the permanent magnet 3 is installed.

[0042] It can be understood that for the above three size comparison relationships, the permanent magnet 3 and the mounting groove 10 can be connected by a connecting mode to install the permanent magnet 3 in the mounting groove 10; but compared with size comparison relationship one, size comparison relationship two and size comparison relationship three, the first arc segment 101 in size comparison relationship one is longer than the second arc segment 102, and the mounting groove 10 is inclined from outside to inside on both sides along the circumferential direction of the flywheel 1 to limit the permanent magnet 3, so the setting mode of size comparison relationship one is more firm than the setting modes of size comparison relationship two and size comparison relationship three.

[0043] In the embodiment, as described above, no matter the size comparison relationship between the first arc segment 101 and the second arc segment 102, the permanent magnet 3 and the mounting groove 10 need to be connected by a connecting mode, but there are many specific connecting modes between them, including but not limited to the following two.

[0044] The first mode: the permanent magnet 3 is fixedly connected with the installation groove 10 through interference fit or transition fit.

[0045] The second mode: the permanent magnet 3 is fixedly connected with the installation groove 10 through gluing.

[0046] It should be understood that the above two modes can meet the needs of the present application, and those skilled in the art can choose according to actual needs; the second mode is preferred in the embodiment.

[0047] It should also be understood that the number and position of the installation groove 10; the number of the installation groove 10 can be only one, or can be provided with a plurality of installation grooves 10, and the plurality of installation grooves 10 are distributed along the circumferential direction of the flywheel 1; it can be understood that no matter how many installation grooves 10 are provided, and what position of the flywheel 1 is provided, the shape and number of the permanent magnet 3 are corresponding to the shape and number of the installation groove 10.

[0048] In the embodiment, as described above, the flywheel 1 rotates relative to the electric disc 2 with the rotation of the crankshaft 5, so that the permanent magnet 3 rotates relative to the charging coil, and an external part is matched to form an engine ignition system; the charging coil is composed of a winding and a pair of magnetic cores 41.

[0049] In the prior art, the winding is arranged in the controller 40, and a pair of magnetic cores 41 are arranged at both ends of the controller 40; however, such arrangement will make the installation efficiency of the whole machine relatively low.

[0050] Therefore, in the embodiment, as shown in Figure 4 and Figure 5 The control assembly 4 includes a controller 40, a magnetic core 41 and a winding. The controller 40 is fixedly installed on the electric disc 2; the magnetic core 41 is arranged in the housing of the controller 40, and the magnetic end 410 of the magnetic core 41 extends out of the housing; the winding is arranged in the housing of the controller 40 and is sleeved on the magnetic core 41, so that the controller 40, the magnetic core 41 and the winding form an integral whole.

[0051] It can be understood that the magnetic core 41 and the controller 40 of the prior art are independently installed; however, in the embodiment, the magnetic core 41 is arranged in the controller 40, and the magnetic end 410 extends out of the housing of the controller 40; from the original independent installation of three parts to now only the controller 40 needs to be installed, which greatly increases the installation efficiency of the whole machine.

[0052] It is also understood that a pair of magnetizing ends 410 are provided, with the pair of magnetizing ends 410 respectively located at both ends of the magnetizing core 41, in order to replace the two independent magnetizing cores 41 in the prior art; at the same time, in order to be more suitable for installation on the power panel 2, the magnetizing ends 410 are provided with an arc-shaped surface on the side near the edge of the power panel 2 housing, and the arc-shaped surfaces of the pair of magnetizing ends 410 are set with the same center.

[0053] In this embodiment, as Figure 4 As shown, the electric disk 2 is sleeved on the crankshaft 5; it can be understood that the crankshaft 5 needs to drive the flywheel 1 to rotate, which will cause wear between it and the electric disk 2; therefore, in order to reduce wear and allow the electric disk 2 to work for a long time, in this embodiment, the electric disk 2 is sleeved on the engine crankshaft 5 through the bearing 6.

[0054] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection claimed by this application is defined by the appended claims and their equivalents.

Claims

1. A concentric flywheel for an internal combustion engine, characterized in that The application relates to a flywheel, an electric disc, a permanent magnet and a control assembly. The flywheel and the electric disc are sleeved on a crankshaft of an engine; the flywheel is provided with an installation groove at one end away from a blade; the permanent magnet is inlaidly installed in the installation groove; the control assembly is installed on the electric disc, and the control assembly is suitable for generating a magnetic field for cooperating with the flywheel.

2. An internal combustion engine concentric flywheel as claimed in claim 1 wherein: The size of the installation groove towards the center of the flywheel is smaller than that away from the center of the flywheel.

3. An internal combustion engine concentric flywheel as claimed in claim 2 wherein: The installation groove has one.

4. An internal combustion engine concentric flywheel as in claim 2, wherein: The installation groove has multiple and is distributed along the circumferential direction of the flywheel; the permanent magnet and the installation groove are in correspondence in shape and equal in number.

5. An internal combustion engine concentric flywheel as in claim 1, wherein: The control assembly comprises a controller, a magnet attracting core and a winding; the controller is fixedly installed on the electric disc; the magnet attracting core is arranged in a shell of the controller, and a magnet attracting end of the magnet attracting core is arranged to extend out of the shell; the winding is arranged in the shell of the controller and is sleeved on the magnet attracting core, so that the controller, the magnet attracting core and the winding are integrated.

6. An internal combustion engine concentric flywheel as claimed in claim 5 wherein: The magnet attracting end is provided with a pair of magnet attracting ends arranged at two ends of the magnet attracting core respectively; the magnet attracting end is provided with an arc surface, and the arc surfaces of the pair of magnet attracting ends are arranged with the same center.

7. An internal combustion engine concentric flywheel as in claim 1, wherein: The permanent magnet is suitable for being connected with the installation groove through interference fit or transition fit.

8. An internal combustion engine concentric flywheel as in claim 1, wherein: The permanent magnet is suitable for being connected with the installation groove through gluing.

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