Acceleration noise generator of electric vehicle

Abstract

A rear bowl is forwards connected with a large cylinder, a gap at the bottom of the large cylinder supports a middle cylinder, U iron is installed in the rear bowl in a supporting mode, magnetic steel and a pole plate are positioned and supported in a step hole of the U iron, a voice diaphragm is arranged above the pole plate, and a phase plug is arranged above the voice diaphragm. The horizontal edge of the periphery of the voice diaphragm is pressed and supported on the upper end face outside the U-iron stepped hole through the phase plug periphery supporting ring, the large cylinder is connected with the upper end face of the phase plug periphery supporting ring in a pressing mode and does not make contact with the upper end face outside the U-iron stepped hole, the portion, above the phase plug, of the bottom of the large cylinder is of a ventilation structure communicated with the interior of the middle cylinder, and an upper opening of the ventilation structure is not an externally-expanded horn mouth. The middle cylinder coaxially covers the ventilation structure in a clearance mode, the center of the inner top wall of the middle cylinder protrudes downwards and is provided with a sound dividing head with an arc-shaped section, and the diameter of the arc-shaped bottom circumference is not smaller than the diameter of an upper opening of the ventilation structure. The ventilation structure on the phase plug is arranged to be a closing-up structure, and the lower convex sound dividing head completely corresponding to the closing-up circumference is matched, so that the requirement of simulating exhaust roars of an oil cylinder of a fuel vehicle through instant high-frequency sound production can be met.

Description

Technical Field

[0001] The utility model relates to a horn, in particular to an electric vehicle acceleration noise generator. Background Art

[0002] With the popularization of new energy vehicles, most electric vehicles have better starting and stopping, as well as internal and external noise reduction effects when running. Compared with the running noise of traditional fuel vehicles, especially the sound of the cylinder and exhaust during acceleration, it has an intuitive warning effect on vehicles and pedestrians around the electric vehicles. The existing electric vehicle external noise electromechanical, surrounding vehicles and pedestrians often cannot judge the distance, speed and emergency acceleration of the vehicle, and misjudge the movement of the electric vehicle, resulting in collisions and other accidents. Summary of the invention

[0003] The utility model provides an electric vehicle acceleration noise generator which can simulate the oil cylinder and exhaust sounds of an oil vehicle when accelerating.

[0004] The technical solution adopted by the utility model is: an electric vehicle acceleration noise generator, including a rear bowl, a large cylinder and a middle cylinder, the rear bowl is connected to the large cylinder forward, the middle cylinder is supported by the gap at the bottom of the large cylinder, a U-iron is supported and installed in the rear bowl, a magnetic steel and a pole plate are positioned and supported in the step hole of the U-iron, a sound membrane is arranged above the pole plate, and a phase plug is arranged above the sound membrane, characterized in that: the horizontal edge of the outer periphery of the sound membrane is pressed and supported on the upper end surface outside the step hole of the U-iron through the outer periphery support ring of the phase plug, the large cylinder is crimped on the upper end surface of the outer periphery support ring of the phase plug and does not contact the upper end surface outside the step hole of the U-iron, the bottom of the large cylinder is a ventilation structure connected to the middle cylinder above the phase plug, the upper mouth of the ventilation structure is not an outward-expanding trumpet mouth, the coaxial gap cover of the middle cylinder is installed outside the ventilation structure, and a sound dividing head with an arc-shaped cross-section is arranged on the center of the inner top wall of the middle cylinder, and the bottom circumference diameter of the arc is not less than the upper mouth diameter of the ventilation structure.

[0005] The upper opening of the ventilation structure is an upwardly folded structure.

[0006] A gasket made of the same material as the phase plug is arranged on the upper end surface outside the U-iron step hole, and the horizontal edge of the outer periphery of the sound membrane is pressed and supported on the gasket through the outer periphery support ring of the phase plug.

[0007] The large cylinder does not contact the upper end surface of the gasket.

[0008] The large cylinder, the rear bowl and the middle cylinder are made of aluminum alloy.

[0009] The large cylinder and the ventilation structure are integrally cast.

[0010] The beneficial effects of the utility model are:

[0011] 1. The sound diaphragm is crimped by the gasket and the phase plug to avoid direct connection with the rear bowl, U iron and large cylinder, which helps to improve the sound accuracy; the ventilation structure on the phase plug is set to a closed structure, and the downward convex sound head that completely corresponds to the closed circle can meet the needs of instantaneous high-frequency sound simulation of the cylinder and exhaust roar of fuel vehicles.

[0012] 2. The phase plug is directly crimped onto the voice coil. Compared with the traditional structure in which the phase plug is connected to the tube, it can more accurately control the gap between the voice coil and the phase plug, thus ensuring the sensitivity of the speaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model.

[0014] In the figure: rear bowl 1, U iron 2, magnetic steel 3, pole plate 4, large cylinder 5, gasket 6, ventilation structure 7, phase plug 8, support ring 9, sound membrane 10, horizontal edge 11, voice coil 12, middle cylinder 13, and crossover head 14. DETAILED DESCRIPTION

[0015] The following is a further description with reference to the accompanying drawings.

[0016] Figure 1 As shown: an electric vehicle acceleration noise generator, including a rear bowl 1, a U iron 2, a magnetic steel 3, a pole plate 4, a large cylinder 5, a gasket 6, a phase plug 8, a sound membrane 10, and a middle cylinder 13.

[0017] The rear bowl 1 is connected to the large cylinder 5 forward, and the gap at the bottom of the large cylinder 5 supports the middle cylinder 13. The U-iron 2 is supported and installed in the rear bowl 1. The magnet 3 and the pole plate 4 are positioned and supported in the step hole of the U-iron 2. The sound membrane 10 is arranged above the pole plate 4, and the voice coil 12 of the sound membrane 10 is located between the step hole of the U-iron 2 and the pole plate 4. A phase plug 8 is arranged above the voice coil 10. The upper end surface of the step hole of the U-iron 2 is supported on a gasket 6 of the same material as the phase plug. The gasket 6 supports the horizontal edge 11 of the sound membrane 10, and the horizontal edge 11 is pressed by the outer peripheral support ring 9 of the phase plug 8. The large cylinder does not contact the gasket. The bottom of the large cylinder 5 is an integrally formed ventilation structure 7 connected to the middle cylinder 13 above the phase plug 8. The upper opening of the ventilation structure 7 is a closed bell mouth. The coaxial gap cover of the middle cylinder 13 is installed outside the ventilation structure 7. The center of the inner top wall of the middle cylinder 13 is convex downward to set a sound dividing head 14 with an arc-shaped cross-section, and the bottom circumference diameter of the arc is not less than the upper opening diameter of the ventilation structure.

[0018] Based on this embodiment, the large cylinder, rear bowl and middle cylinder are preferably made of aluminum alloy.

Claims

1. An electric vehicle acceleration noise generator, comprising a rear bowl, a large cylinder and a middle cylinder, wherein the rear bowl is connected to the large cylinder forward, the gap at the bottom of the large cylinder supports the middle cylinder, a U-iron is supported and installed in the rear bowl, a magnetic steel and a pole plate are positioned and supported in the step hole of the U-iron, a sound film is arranged above the pole plate, and a phase plug is arranged above the sound film, characterized in that: The horizontal edge of the outer periphery of the sound diaphragm is pressed and supported on the upper end face outside the U-iron step hole through the outer periphery support ring of the phase plug. The large cylinder is crimped to the upper end face of the outer periphery support ring of the phase plug and does not contact the upper end face outside the U-iron step hole. The bottom of the large cylinder is above the phase plug and is a ventilation structure connected to the middle cylinder. The upper mouth of the ventilation structure is not an outward-expanding bell mouth. The coaxial gap cover of the middle cylinder is installed outside the ventilation structure. The center of the inner top wall of the middle cylinder is protruding downward to set a sound crossover head with an arc-shaped crossover section. The bottom circumference diameter of the arc is not less than the upper diameter of the ventilation structure.

2. The electric vehicle acceleration noise generator according to claim 1, characterized in that: The upper opening of the ventilation structure is an upwardly folded structure.

3. The electric vehicle acceleration noise generator according to claim 1, characterized in that: A gasket made of the same material as the phase plug is arranged on the upper end surface outside the U-iron step hole, and the horizontal edge of the outer periphery of the sound membrane is pressed and supported on the gasket through the outer periphery support ring of the phase plug.

4. The electric vehicle acceleration noise generator according to claim 3, characterized in that: The large cylinder does not contact the upper end surface of the gasket.

5. The electric vehicle acceleration noise generator according to claim 1, characterized in that: The large cylinder, the rear bowl and the middle cylinder are made of aluminum alloy.

6. The electric vehicle acceleration noise generator according to claim 1, characterized in that: The large cylinder and the ventilation structure are integrally cast.

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