Gear, speed reducer and vehicle

Abstract

The utility model relates to a gear, a speed reducer and a vehicle, in particular to the technical field of vehicle parts. The gear comprises a first side and a second side in the axial direction of the gear, the multiple spokes are arranged between the inner wheel part and the outer wheel part and connected with the inner wheel part and the outer wheel part, the surface, facing the first side, of each spoke comprises a first area, and the first areas are arranged in a power exponent law in the circumferential direction of the inner wheel part. Vibration sound is generated in the rotating process of the gear, the vibration and the sound are transmitted along the inner gear part, the outer gear part and the multiple spokes of the gear, when the vibration and the sound are transmitted to the multiple spokes, due to the fact that the first area is arranged according to the power exponent rule, in the process that sound wave energy is transmitted along the power exponent surface of the first area, the phase speed and the group speed are gradually reduced, and therefore the sound wave energy is reduced; and the noise is reduced. By changing the shape of the spoke, the overall structure of the gear is reasonable, and the noise reduction effect of the spoke is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle parts technical field, concretely relates to a gear, speed reducer and vehicle. BACKGROUND

[0002] Gear transmission system is an important part of vehicle power transmission, and noise will be generated in the rotation process of gear, in new energy vehicles such as electric vehicle, the existence of traditional internal combustion engine is eliminated, and the reduction of engine noise makes the overall noise level of vehicle significantly decrease. This also makes the noise generated in the process of gear transmission become more prominent, and becomes an important factor affecting the driving experience of passengers.

[0003] Through retrieval, the patent document with the application publication number CN115126846A provides a shock-absorbing and noise-reducing gear, which is provided with an acoustic black hole structure at the end of the gear.

[0004] However, the gear has the problems of unreasonable structure and small noise reduction effect. UTILITY MODEL CONTENT

[0005] The present application provides a gear, a speed reducer and a vehicle. To at least solve the problem of unreasonable gear structure and small noise reduction effect in the related art.

[0006] In order to achieve the above-mentioned purpose, the technical scheme adopted by the utility model is as follows:

[0007] In a first aspect, a gear is provided, along the axial direction of the gear, the gear includes a first side and a second side, the gear includes an inner wheel part, an outer wheel part and a plurality of spokes, wherein along the radial direction of the gear, the outer wheel part is arranged on the outer side of the inner wheel part, the plurality of spokes is arranged between the inner wheel part and the outer wheel part, the plurality of spokes connects the inner wheel part and the outer wheel part, the surface of the spoke towards the first side includes a first area, along the circumferential direction of the inner wheel part, the first area is arranged in a power exponential law.

[0008] The gear generates vibration sound in the rotation process, the vibration and sound are transmitted along the inner wheel part, the outer wheel part and the plurality of spokes of the gear, when transmitted to the plurality of spokes, because the first area is arranged in a power exponential law, the phase velocity and group velocity gradually decrease in the transmission process of sound wave energy along the power exponential surface of the first area, thereby reducing the sound wave energy and further reducing the noise. By changing the shape of the spoke, the overall structure of the gear is reasonable, and the effect of reducing noise by the spoke is improved.

[0009] In a possible implementation, the surface of the spoke towards the first side includes a second area, the second area is connected with the first area, and the second area is arranged in a power exponential law along the circumferential direction of the inner wheel part.

[0010] By setting the second region, when the sound wave is transmitted to the second region, the phase velocity and group velocity of the sound wave energy gradually decrease, which can further optimize the sound wave propagation characteristics, and thus reduce the noise generated by the gear during rotation.

[0011] In a possible implementation, the surface of the spoke towards the second side comprises a third region, and the third region is arranged in a power exponential law along the circumference of the inner wheel part.

[0012] By setting the third region, the noise reduction effect can be further improved. Meanwhile, the power exponential law arrangement on both the first side and the second side can improve the mechanical properties of the spoke, so that the gear has better strength and stiffness when bearing load, and thus the stability and durability of the overall structure are improved.

[0013] In a possible implementation, the surface of the spoke towards the second side comprises a fourth region, the fourth region is connected with the third region, and the fourth region is arranged in a power exponential law along the circumference of the inner wheel part.

[0014] By setting the fourth region, when the sound wave is transmitted to the fourth region, the phase velocity and group velocity of the sound wave energy gradually decrease, which can further optimize the sound wave propagation characteristics, and thus reduce the noise generated by the gear during rotation.

[0015] In a possible implementation, a plurality of spokes are arranged at intervals along the circumference of the inner wheel part.

[0016] The plurality of spokes are arranged at intervals along the circumference of the inner wheel part, and the hollow region is between adjacent spokes, which can reduce the amount of gear material and the weight of the gear.

[0017] In a possible implementation, the plurality of spokes are sequentially connected along the circumference of the inner wheel part.

[0018] The plurality of spokes are sequentially connected along the circumference of the inner wheel part, which can improve the mechanical properties of the gear in the axial and radial directions, improve the strength and stiffness of the gear, and thus improve the stability and durability of the gear structure.

[0019] In a possible implementation, the gear comprises an elastic member, the elastic member is located at the connection between the first region and the second region, and the elastic member is connected with the first region and the second region.

[0020] The elastic member can absorb the vibration energy of the sound wave transmitted to the connection between the first region and the second region, and thus reduce the noise.

[0021] In a possible implementation, the elastic member is damping glue.

[0022] The damping glue can effectively absorb and dissipate vibration energy, reduce vibration transmission in the gear, thus reduce the noise and vibration generated by the gear during rotation, and improve the comfort and reliability of the gear.

[0023] In a second aspect, a reducer is provided, comprising a power element and the gear according to any one of the embodiments of the first aspect, wherein the power element is in driving connection with the gear.

[0024] In a third aspect, a vehicle is provided, comprising the reducer according to any one of the embodiments of the second aspect.

[0025] The utility model discloses the beneficial effect:

[0026] (1) the vibration sound produced in the rotation process of the gear, and the vibration and sound are transmitted along the inner wheel part, the outer wheel part and the plurality of spokes, when transmitted to the plurality of spokes, because the first area is set in power exponential law, the phase velocity and group velocity gradually reduce in the transmission process of sound wave energy along the power exponential surface of the first area, thereby reducing the sound wave energy, and further reducing the noise.

[0027] (2) by setting the second area, the phase velocity and group velocity of sound wave energy gradually reduce when the sound wave is transmitted to the second area, which can further optimize the sound wave propagation characteristics and further reduce the noise produced in the rotation process of the gear.

[0028] (3) by setting the third area, the noise reduction effect can be further improved, and the mechanical properties of the spokes can be improved by setting the power exponential law on the first side and the second side, so that the gear has better strength and stiffness when bearing load, and the stability and durability of the overall structure are further improved.

[0029] (4) by setting the fourth area, the phase velocity and group velocity of sound wave energy gradually reduce when the sound wave is transmitted to the fourth area, which can further optimize the sound wave propagation characteristics and further reduce the noise produced in the rotation process of the gear.

[0030] (5) the plurality of spokes are arranged along the circumference of the inner wheel part, and the hollow area is arranged between the adjacent spokes, which can reduce the amount of gear material and the weight of the gear.

[0031] (6) the plurality of spokes are sequentially connected along the circumference of the inner wheel part, which can improve the mechanical properties of the gear in the axial and radial directions, improve the strength and stiffness of the gear, and further improve the stability and durability of the gear structure.

[0032] (7) the elastic member can absorb the vibration energy of the sound wave transmitted to the connection between the first area and the second area, thereby reducing the noise.

[0033] (8) the damping glue can effectively absorb and dissipate vibration energy, reduce the vibration transmission in the gear, thereby reducing the noise and vibration produced by the rotation of the gear, and improving the comfort and reliability of the gear.

[0034] It should be noted that the technical effects brought by any implementation manner of the second aspect and the third aspect can refer to the technical effects brought by the corresponding implementation manner in the first aspect, and details are not described here.

[0035] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present application. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 A structural schematic diagram of a gear provided by an embodiment of the present application is shown;

[0037] Figure 2 A structural schematic diagram of a spoke provided by an embodiment of the present application is shown;

[0038] Figure 3 A structural schematic diagram of a spoke provided by an embodiment of the present application is shown; Figure 2 A sectional structural schematic diagram of a spoke provided by an embodiment of the present application is shown;

[0039] Figure 4 A structural schematic diagram of another spoke provided by an embodiment of the present application is shown;

[0040] Figure 5 A sectional structural schematic diagram of a spoke provided by an embodiment of the present application is shown. Figure 4

[0041] Reference signs: 10-gear;

[0042] 1-inner wheel part; 2-outer wheel part; 3-spoke; 31-first area; 32-second area; 33-third area; 34-fourth area;

[0043] 4-elastic member. DETAILED DESCRIPTION

[0044] In order for the ordinary person in the art to better understand the technical solutions of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings.

[0045] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above drawings are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. The implementation described in the following exemplary embodiments does not represent all implementations consistent with the present application. On the contrary, they are only examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0046] ​The application provides a gear, a speed reducer and a vehicle. In order to facilitate the description of each embodiment below, before introducing the embodiments of the application, first introduce some professional terms to be mentioned in the embodiments of the application, in particular:

[0047] Acoustic Black Holes (ABH): Acoustic black holes are used to reduce the thickness of the structure in a certain power function form, so that the phase velocity of the bending wave gradually decreases to achieve the gradual gathering of energy. In an ideal case, the bending wave velocity is reduced to zero, so it cannot be transmitted to the edge of the structure, and reflection does not occur. The acoustic black hole effect causes the structure to produce a high energy density area, so it can be efficiently applied to energy recovery and vibration noise control.

[0048] As Figure 1 shown, according to the first aspect of the application, a gear 10 is provided, along the axial direction of the gear 10, the gear 10 includes a first side and a second side, the gear 10 includes an inner wheel part 1, an outer wheel part 2 and a plurality of spokes 3, wherein along the radial direction of the gear 10, the outer wheel part 2 is arranged on the outer side of the inner wheel part 1, the plurality of spokes 3 is arranged between the inner wheel part 1 and the outer wheel part 2, the plurality of spokes 3 connects the inner wheel part 1 and the outer wheel part 2, the surface of the spoke 3 towards the first side includes a first area 31, along the circumferential direction of the inner wheel part 1, the first area 31 is arranged in a power exponential law.

[0049] The gear 10 generates vibration sound during rotation, and the vibration and sound are transmitted along the inner wheel part 1, the outer wheel part 2 and the plurality of spokes 3 of the gear 10. When transmitted to the plurality of spokes 3, because the first area 31 is arranged in a power exponential law, the phase velocity and group velocity gradually decrease during the transmission of acoustic energy along the power exponential surface of the first area 31, thereby reducing the acoustic energy and further reducing the noise. By changing the shape of the spoke 3, the overall structure of the gear 10 is reasonable, and the effect of reducing noise by the spoke 3 is improved.

[0050] In a possible implementation, the inner wheel part 1 and the outer wheel part 2 are coaxially arranged. In a possible implementation, the inner wheel part 1 and the outer wheel part 2 are arranged off-axis.

[0051] The embodiments of the application will be described in detail below with reference to the drawings, and before the embodiments of the application are described in detail, the application scenario of the embodiments of the application will be introduced first.

[0052] The application provides a speed reducer, which includes a power member and the gear 10 provided in any one of the embodiments of the first aspect, and the power member is in transmission connection with the gear 10.

[0053] The power member can include a motor, an engine, a cylinder, and in the transmission process, the gear 10, a rack, a chain and components with transmission function can be selected.

[0054] Of course, in addition to these, gear 10 can also be used in various vehicles, power tools, home appliances, portable devices, outdoor equipment, medical devices, etc.

[0055] Specifically, means of transportation include, but are not limited to, vehicles, bicycles, and motorcycles; power tools include, but are not limited to, electric drills and chainsaws; household appliances include, but are not limited to, vacuum cleaners, robot vacuums, air conditioners, and refrigerators; portable devices include, but are not limited to, portable power banks, portable speakers, and drones; outdoor equipment includes, but is not limited to, power banks and camping lights; and medical devices include, but are not limited to, heart rate monitors.

[0056] This application provides a vehicle including a speed reducer. The vehicle may be one of a sedan, SUV, MPV, truck, van, or special vehicle. The vehicle provided in this application may also be at least one of a gasoline-powered vehicle, a hydrogen-powered vehicle, an electric vehicle, or a hybrid vehicle.

[0057] In one possible implementation, the first region 31 can be arranged in a power-law pattern in a clockwise direction along the first side of the gear 10, or the first region 31 can be arranged in a power-law pattern in a counterclockwise direction along the first side of the gear 10. The direction of the power-law arrangement can be selected appropriately according to the rotation direction of the gear 10, as well as the production process, production equipment, etc., thereby improving the flexibility of the gear 10.

[0058] Combination Figure 1 , Figure 2 and Figure 3 As shown, in one possible implementation, the surface of the spoke 3 facing the first side includes a second region 32, which is connected to the first region 31, and the second region 32 is arranged in a power-law pattern along the circumference of the inner wheel portion 1.

[0059] By setting the second region 32, when the sound wave is transmitted to the second region 32, the phase velocity and group velocity of the sound wave energy gradually decrease, which can further optimize the sound wave propagation characteristics and thus reduce the noise generated by the gear 10 during rotation.

[0060] In one possible implementation, one of the second region 32 and the first region 31 is arranged clockwise along the first side of the gear 10, and the other is arranged counterclockwise along the first side of the gear 10.

[0061] Thus, the first region 31 and the second region 32 transmit sound waves to the junction of the first region 31 and the second region 32. The sound wave energy produces a sound wave focusing effect at the end of the first region 31. Similarly, the sound wave energy produces a sound wave focusing effect at the end of the second region 32. The sound waves in the first region 31 and the second region 32 propagate in opposite directions, producing a partial cancellation effect, thereby reducing the sound wave energy and thus reducing noise.

[0062] CombinationFigure 1 、 Figure 4 and Figure 5 As shown in FIG. 1, in a possible implementation, the surface of the spoke 3 facing the second side includes a third region 33, and the third region 33 is arranged in a power-law manner along the circumference of the inner wheel part 1.

[0063] The third region 33 can reduce the noise on the second side of the gear 10, and the first region 31 can reduce the noise on the first side of the gear 10, so that by arranging the third region 33, the noise reduction effect can be further improved.

[0064] Meanwhile, the power-law arrangement on both the first side and the second side can improve the mechanical properties of the spoke 3, so that the gear 10 has better strength and rigidity when bearing load, and thus the stability and durability of the overall structure are improved.

[0065] In a possible implementation, the surface of the spoke 3 facing the second side includes a fourth region 34, and the fourth region 34 is connected with the third region 33, and the fourth region 34 is arranged in a power-law manner along the circumference of the inner wheel part 1.

[0066] By arranging the fourth region 34, when the sound wave is transmitted to the fourth region 34, the phase velocity and group velocity of the sound wave energy gradually decrease, so that the sound wave propagation characteristics can be further optimized, and thus the noise generated by the gear 10 during rotation is reduced.

[0067] The effect of arranging the third region 33 and the fourth region 34 on the second side is the same as the effect of arranging the first region 31 and the second region 32 on the first side, which will not be described herein.

[0068] Meanwhile, the first region 31, the second region 32, the third region 33, and the fourth region 34 are arranged in a power-law manner along the circumference of the inner wheel part 1, so that the noise reduction effect can be further improved.

[0069] Continuing to refer to FIG. 1, Figure 1 In a possible implementation, a plurality of spokes 3 are arranged in a spaced manner along the circumference of the inner wheel part 1.

[0070] The plurality of spokes 3 are arranged in a spaced manner along the circumference of the inner wheel part 1, and the hollow region is between adjacent spokes 3, so that the material usage of the gear 10 can be reduced, and the weight of the gear 10 is reduced.

[0071] The two adjacent spokes 3 do not contact each other, so that the sound wave energy is reduced in the propagation between the two adjacent spokes 3.

[0072] In a possible implementation, the plurality of spokes 3 are sequentially arranged in a connected manner along the circumference of the inner wheel part 1.

[0073] The plurality of spokes 3 are sequentially connected along the circumference of the inner wheel part 1, which can improve the mechanical properties of the gear 10 in the axial and radial directions, improve the strength and rigidity of the gear 10, and further improve the stability and durability of the gear 10 structure.

[0074] Meanwhile, the plurality of regions arranged in a power index law can reduce the amount of gear 10 material.

[0075] Continuing to refer to Figure 2 and Figure 3 In a possible implementation, the gear 10 includes an elastic member 4, which is located at the connection between the first region 31 and the second region 32, and is connected with the first region 31 and the second region 32.

[0076] When the first region 31 and the second region 32 transmit sound waves to the connection between the first region 31 and the second region 32, the elastic member 4 can absorb the vibration energy of the sound waves, further consume the sound wave energy through the characteristics of the elastic member 4, and thus reduce noise.

[0077] In a possible implementation, the elastic member 4 can also be a rubber member, and can also be a plastic member.

[0078] In a possible implementation, the elastic member 4 is a damping rubber.

[0079] The damping rubber can effectively absorb and dissipate vibration energy, reduce vibration transmission in the gear 10, thereby reducing noise and vibration generated by the rotation of the gear 10, and improving the comfort and reliability of the gear 10.

[0080] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto, any change or replacement within the technical scope disclosed in the present application should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A gear wheel (10) characterized in that, Along the axial direction of the gear (10), the gear (10) comprises a first side and a second side, the gear (10) comprises: an inner wheel part (1); an outer wheel part (2) disposed outside the inner wheel part (1) along the radial direction of the gear (10); a plurality of spokes (3) disposed between the inner wheel part (1) and the outer wheel part (2), the plurality of spokes (3) connecting the inner wheel part (1) and the outer wheel part (2); the surface of the spoke (3) towards the first side comprises a first area (31) disposed in a power exponential law along the circumferential direction of the inner wheel part (1).

2. The gear (10) according to claim 1, characterized in that The surface of the spoke (3) towards the first side comprises a second area (32) connected with the first area (31), the second area (32) is disposed in a power exponential law along the circumferential direction of the inner wheel part (1).

3. The gearwheel (10) according to claim 1 or 2, characterized in that The surface of the spoke (3) towards the second side comprises a third area (33) disposed in a power exponential law along the circumferential direction of the inner wheel part (1).

4. The gear (10) according to claim 3, characterized in that The surface of the spoke (3) towards the second side comprises a fourth area (34) connected with the third area (33), the fourth area (34) is disposed in a power exponential law along the circumferential direction of the inner wheel part (1).

5. The gear (10) according to claim 1, characterized in that The plurality of spokes (3) are spaced apart along the circumferential direction of the inner wheel part (1).

6. The gear (10) according to claim 1, characterized in that The plurality of spokes (3) are sequentially connected along the circumferential direction of the inner wheel part (1).

7. The gear (10) according to claim 2, characterized in that The gear (10) comprises: a resilient member (4) located at the connection between the first area (31) and the second area (32), the resilient member (4) being connected with the first area (31) and the second area (32).

8. The gear (10) according to claim 7, characterized in that The resilient member (4) is damping glue.

9. A speed reducer characterized by, Comprise: a power member; The gear (10) of any one of claims 1-8, the power member being in driving connection with the gear (10).

10. A vehicle characterized by comprising: Comprise the speed reducer of claim 9.

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