A low noise automobile generator

Abstract

The utility model discloses a low -noise's automobile generator relates to automobile generator technical field, including pulley assembly, front cover subassembly, rotor, stator subassembly, back cover, rectifier, back end cover and composite sound insulation cover, and front cover subassembly installs one end of pulley assembly, and stator subassembly installs the outside of rotor, and back cover is fixedly connected with stator subassembly through connecting piece, and rectifier installs the bottom of rotor, and back end cover installs the bottom of back cover through connecting piece, and a plurality of composite sound insulation covers are installed in the inner chamber of back cover and front cover subassembly respectively. The utility model discloses the setting mode of rectifier and composite sound insulation cover cooperation, has the heat dissipation and the noise reduction function, reduces electromagnetic howling, improves the heat dissipation efficiency, avoids the noise increase caused by overheating, and composite sound insulation cover can effectively absorb high -frequency noise and inhibit structure vibration transmission, utilizes the structure that back end cover and back cover are matched and, reduces the influence of motor vibration noise.

Description

Technical Field

[0001] This utility model relates to the field of automotive generator technology, and in particular to a low-noise automotive generator. Background Technology

[0002] The automotive alternator is a core component of a vehicle's electrical system, responsible for charging the battery and powering onboard electronic devices. During operation, traditional alternators generate significant mechanical and electromagnetic noise due to factors such as high-speed rotor rotation, electromagnetic vibration, belt drive impact, and high-frequency switching of the rectifier. This noise not only affects driving comfort but can also cause long-term fatigue damage to the alternator's structure, reducing its lifespan.

[0003] Currently, most automotive alternators on the market use a standard metal casing structure, which offers limited sound insulation and vibration damping capabilities. Some improvements reduce noise by adding rubber pads or simple sound-absorbing materials, but due to a lack of systematic optimization, the noise reduction effect is limited and may even affect heat dissipation performance. Utility Model Content

[0004] The purpose of this invention is to provide a low-noise automotive generator to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a low-noise automotive generator, comprising:

[0006] Pulley assembly;

[0007] A front cover assembly, the front cover assembly being mounted at one end of a pulley assembly;

[0008] A rotor, one end of which is fixedly connected to one end of a pulley assembly;

[0009] A stator assembly, which is mounted outside the rotor;

[0010] The rear cover is fixedly connected to the stator assembly via a connector, and the stator assembly is disposed between the rear cover and the front cover assembly.

[0011] A rectifier, which is mounted at the bottom of the rotor;

[0012] A rear end cover, which is installed at the bottom of the rear cover via a connector;

[0013] Composite soundproof covers, wherein multiple composite soundproof covers are respectively installed in the inner cavity of the rear cover and the front cover assembly.

[0014] Preferably, the pulley assembly includes:

[0015] Wheel body, the wheel body being disposed on top of the front cover assembly;

[0016] A torsional damper, wherein the torsional damper is installed between the inner wall of the wheel body and the outer wall of the rotor.

[0017] Preferably, the front cover assembly includes:

[0018] The front cover is connected to the rear cover by a connector, and the composite sound insulation cover is fixed to the inner wall of the front cover and the rear cover.

[0019] The rotor is rotatably connected to the middle of the front cover via a bearing;

[0020] A connecting cover is installed between the front cover and the rotor by a screw.

[0021] Preferably, the stator assembly includes:

[0022] Stator rings, which are fitted around the outside of the rotor;

[0023] The mating grooves are arranged in a ring array on the outer wall of the stator ring;

[0024] The bolt engages with the inner cavity of the mating groove, and is used for the insertion and fixing of the rear cover and the front cover.

[0025] Preferably, the rectifier includes:

[0026] A phase rectifier bridge busbar, wherein the phase rectifier bridge busbar is sleeved on the other end of the rotor;

[0027] A phase rectifier bridge positive heat sink is attached to the bottom of the phase rectifier bridge busbar;

[0028] A negative heat sink for the phase rectifier bridge, wherein multiple negative heat sinks for the phase rectifier bridge are snapped onto the top of the phase rectifier bridge busbar.

[0029] Preferably, the outer walls of both the positive heat sink of the phase rectifier bridge and the negative heat sink of the phase rectifier bridge are coated with a thermally conductive and noise-reducing coating, and the thickness of the thermally conductive and noise-reducing coating is -μm.

[0030] Preferably, the rear end cover includes:

[0031] The rear cover is attached to the bottom of the rear cover by screws;

[0032] Spring steel sheets, a plurality of said spring steel sheets are installed in a ring array on the inner wall of the rear cover;

[0033] A rubber washer is fixed to the inner wall of the spring steel sheet and fits against the bottom of the rear cover.

[0034] Preferably, the composite soundproof cover includes:

[0035] Sound-absorbing sponge layers, with multiple sound-absorbing sponge layers respectively disposed on the inner walls of the rear cover and the front cover;

[0036] A damping alloy layer, wherein multiple damping alloy layers are respectively fixed to the inner wall of the rear cover and the inner wall of the front cover, and the sound-absorbing sponge layer is fixed to the inner wall of the damping alloy layer.

[0037] The technical effects and advantages of this utility model are as follows:

[0038] This utility model uses a combination of a rectifier and a composite soundproof cover. The rectifier surface is coated with a thermally conductive and noise-reducing coating, which has both heat dissipation and noise reduction functions, reducing electromagnetic howling. Combined with the high thermal conductivity coating, the heat dissipation efficiency is improved, avoiding noise increase caused by overheating. The composite soundproof cover can effectively absorb high-frequency noise and suppress the transmission of structural vibration. The structure of the rear end cover and the rear cover is used to reduce the impact of motor vibration noise. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the overall installation structure of this utility model.

[0040] Figure 2 This is a schematic diagram of the overall exploded structure of this utility model.

[0041] Figure 3 This is a schematic diagram of the exploded structure of the stator assembly of this utility model.

[0042] Figure 4 This is a partial cross-sectional view of the front of the rear end cover of this utility model.

[0043] In the diagram: 1. Pulley assembly; 11. Wheel body; 12. Torsional shock absorber; 2. Front cover assembly; 21. Front cover body; 22. Bearing; 23. Connecting cover; 3. Rotor; 4. Stator assembly; 41. Stator ring; 42. Mating groove; 43. Bolt; 5. Rear cover; 6. Rectifier; 61. Phase rectifier bridge busbar; 62. Phase rectifier bridge positive heat sink; 63. Phase rectifier bridge negative heat sink; 7. Rear end cover; 71. Rear cover body; 72. Spring steel sheet; 73. Rubber gasket; 8. Composite sound insulation cover; 81. Sound-absorbing sponge layer; 82. Damping alloy layer. Detailed Implementation

[0044] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0045] This utility model provides, for example Figure 1-4 The diagram shows a low-noise automotive generator, comprising a pulley assembly 1, a front cover assembly 2, a rotor 3, a stator assembly 4, a rear cover 5, a rectifier 6, a rear end cover 7, and composite sound insulation covers 8. The front cover assembly 2 is mounted on one end of the pulley assembly 1, and one end of the rotor 3 is fixedly connected to one end of the pulley assembly 1. The stator assembly 4 is mounted on the outside of the rotor 3. The rear cover 5 is fixedly connected to the stator assembly 4 via a connector, and the stator assembly 4 is disposed between the rear cover 5 and the front cover assembly 2. The rectifier 6 is mounted on the bottom of the rotor 3, and the rear end cover 7 is mounted on the bottom of the rear cover 5 via a connector. Multiple composite sound insulation covers 8 are respectively installed in the inner cavities of the rear cover 5 and the front cover assembly 2. The composite sound insulation covers 8 are provided to reduce the noise of the automotive generator.

[0046] The pulley assembly 1 includes a wheel body 11 and a torsional damper 12. The wheel body 11 is located on the top of the front cover assembly 2. The torsional damper 12 is installed between the inner wall of the wheel body 11 and the outer wall of the rotor 3. The torsional stiffness is 100-120 N.m / rad, which is used to reduce the torsional vibration force between the wheel body 11 and the rotor 3.

[0047] In addition, the front cover assembly 2 includes a front cover body 21, a bearing 22 and a connecting cover 23. The front cover body 21 is connected to the rear cover 5 through a connector. The composite sound insulation cover 8 is fixed to the inner wall of the front cover body 21 and the rear cover 5. The rotor 3 is rotatably connected to the middle of the front cover body 21 through the bearing 22. The connecting cover 23 is installed between the front cover body 21 and the rotor 3 through a screw, which facilitates a stable connection between the front cover body 21 and the rotor 3.

[0048] The stator assembly 4 includes a stator ring 41, a mating groove 42, and a bolt 43. The stator ring 41 is sleeved on the outside of the rotor 3. Multiple mating grooves 42 are arranged in a ring array on the outer wall of the stator ring 41. The bolt 43 is engaged with the inner cavity of the mating groove 42. The bolt 43 is used to fix the rear cover 5 and the front cover 21. The bolt 43 improves the stability of the connection between the rear cover 5 and the front cover 21, and also improves the stability of the stator ring 41 in the inner cavity of the rear cover 5.

[0049] Furthermore, the rectifier 6 includes a phase rectifier bridge busbar 61, a phase rectifier bridge positive heat sink 62, and a phase rectifier bridge negative heat sink 63. The phase rectifier bridge busbar 61 is sleeved on the other end of the rotor 3. The phase rectifier bridge positive heat sink 62 is fitted to the bottom of the phase rectifier bridge busbar 61. Multiple phase rectifier bridge negative heat sinks 63 are snapped onto the top of the phase rectifier bridge busbar 61. The outer walls of the phase rectifier bridge positive heat sink 62 and the phase rectifier bridge negative heat sink 63 are coated with a thermally conductive and noise-reducing coating with a thickness of 50-80μm. The thermally conductive and noise-reducing coating includes a boron nitride layer and a graphene coating, which facilitates the improvement of the heat dissipation and noise reduction performance of the rectifier 6, and further improves the noise reduction performance of the automotive generator.

[0050] The rear cover 7 includes a rear cover body 71, spring steel sheets 72, and rubber gaskets 73. The rear cover body 71 is installed at the bottom of the rear cover 5 by screws. Multiple spring steel sheets 72 are installed in a ring array on the inner wall of the rear cover body 71. The rubber gaskets 73 are fixed to the inner wall of the spring steel sheets 72 and fit against the bottom of the rear cover 5. The rubber gaskets 73 are made of fluororubber, and the inner ring of the rubber gaskets 73 is provided with concave and convex damping textures to improve the shock absorption performance of the connection between the rear cover 7 and the rear cover 5.

[0051] Furthermore, the composite soundproof cover 8 includes a sound-absorbing sponge layer 81 and a damping alloy layer 82. Multiple sound-absorbing sponge layers 81 are respectively disposed on the inner walls of the rear cover 5 and the front cover 21, and multiple damping alloy layers 82 are respectively fixed to the inner walls of the rear cover 5 and the front cover 21. The sound-absorbing sponge layer 81 is fixed to the inner wall of the damping alloy layer 82. The sound-absorbing sponge layer 81 is made of melamine foam with a density of 8-10 kg / m³, and the damping alloy layer 82 is made of magnesium-aluminum alloy with a density of 1.6-1.8 g / cm³. Through the sound-absorbing sponge layer 81 and the damping alloy layer 82, it is convenient to absorb and reduce the noise in the inner cavity of the rear cover 5 and the front cover 21, thereby improving the noise reduction performance of the car generator.

[0052] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A low-noise automotive generator, characterized in that, include: Pulley assembly (1); Front cover assembly (2), which is mounted on one end of pulley assembly (1); Rotor (3), one end of which is fixedly connected to one end of pulley assembly (1); Stator assembly (4), which is mounted on the outside of rotor (3); The rear cover (5) is fixedly connected to the stator assembly (4) by a connector, and the stator assembly (4) is disposed between the rear cover (5) and the front cover assembly (2). A rectifier (6) is mounted on the bottom of the rotor (3); The rear end cover (7) is installed at the bottom of the rear cover (5) via a connector; Composite soundproof covers (8), a plurality of composite soundproof covers (8) are respectively installed in the inner cavity of the rear cover (5) and the front cover assembly (2).

2. The low-noise automotive generator according to claim 1, characterized in that, The pulley assembly (1) includes: Wheel body (11), said wheel body (11) is disposed on top of front cover assembly (2); Torsional damper (12), which is installed between the inner wall of the wheel body (11) and the outer wall of the rotor (3).

3. The low-noise automotive generator according to claim 1, characterized in that, The front cover assembly (2) includes: The front cover (21) is connected to the rear cover (5) by a connector, and the composite sound insulation cover (8) is fixed to the inner wall of the front cover (21) and the rear cover (5); The rotor (3) is rotatably connected to the middle of the front cover (21) via the bearing (22); Connecting cover (23), which is installed between the front cover (21) and the rotor (3) by a screw.

4. A low-noise automotive generator according to claim 3, characterized in that, The stator assembly (4) includes: Stator ring (41), said stator ring (41) is sleeved on the outside of rotor (3); The mating grooves (42) are arranged in a ring array on the outer wall of the stator ring (41); Bolt (43) engages with the inner cavity of the mating groove (42), and bolt (43) is used to fix the rear cover (5) and the front cover (21) through and through.

5. A low-noise automotive generator according to claim 1, characterized in that, The rectifier (6) includes: Phase rectifier bridge busbar (61), the phase rectifier bridge busbar (61) is sleeved on the other end of the rotor (3); A phase rectifier bridge positive heat sink (62) is attached to the bottom of the phase rectifier bridge busbar (61); Phase rectifier bridge negative heat sink (63), multiple phase rectifier bridge negative heat sinks (63) are snapped onto the top of the phase rectifier bridge busbar (61).

6. A low-noise automotive generator according to claim 5, characterized in that, The outer walls of the positive heat sink (62) and negative heat sink (63) of the phase rectifier bridge are coated with a thermally conductive and noise-reducing coating, the thickness of which is 50-80μm.

7. A low-noise automotive generator according to claim 1, characterized in that, The rear end cover (7) includes: The rear cover (71) is installed at the bottom of the rear cover (5) by screws; Spring steel sheets (72), a plurality of said spring steel sheets (72) are installed in a ring array on the inner wall of the rear cover (71); A rubber washer (73) is fixed to the inner wall of the spring steel sheet (72) and the rubber washer (73) is in contact with the bottom of the rear cover (5).

8. A low-noise automotive generator according to claim 1, characterized in that, The composite soundproof cover (8) includes: Sound-absorbing sponge layer (81), and multiple sound-absorbing sponge layers (81) are respectively disposed on the inner walls of the rear cover (5) and the front cover (21); Damping alloy layer (82), multiple damping alloy layers (82) are respectively fixed to the inner wall of the rear cover (5) and the inner wall of the front cover (21), and the sound-absorbing sponge layer (81) is fixed to the inner wall of the damping alloy layer (82).

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