Sound attenuation assembly, ring configured to attenuate sound, and method

Abstract

The present invention relates to a sound attenuation assembly, ring configured to attenuate sound, and method. A sound attenuation assembly includes a housing and a component supported by the housing. The component is movable relative to the housing. The sound attenuation assembly includes a ring coupled to the component and the housing. The ring is configured to attenuate sound causing vibrations in response to operation of the component. The ring includes a flange fixed relative to the housing to maintain a position of the ring relative to the component to maximize attenuation of the sound in response to operation of the component. A method of attenuating sound causing vibrations in response to operation of a component inside a housing using a ring. A torque applied to the ring is selected. A stiffness of the ring is determined based on a stiffness-torque curve that utilizes the selected torque to maximize attenuation of the sound. The ring is manufactured to meet the determined stiffness.

Description

[0001] introduction

[0002] Vehicles include many rotating parts that can rotate during operation. These rotating parts may generate noise during operation. This noise may be heard by the occupants of the vehicle. Summary of the Invention

[0003] This disclosure provides a noise reduction assembly including a housing and a component supported via the housing. The component is movable relative to the housing. The noise reduction assembly also includes a ring coupled to the component and the housing. The ring is configured to attenuate sound that causes vibrations in response to operation of the component. The ring includes a flange fixed relative to the housing to maintain a position of the ring relative to the component that maximizes sound attenuation in response to operation of the component.

[0004] In some respects, the ring includes a body extending to a first distal edge and a second distal edge opposite to each other. Typically, a flange protrudes from one of the first distal edge and the second distal edge.

[0005] In various respects, the component can rotate about a central axis. For example, the component can rotate about a central axis, which creates a high-load area on the component. In some configurations, the body of the flange retaining ring is positioned along the high-load area to maximize sound attenuation in response to the operation of the component.

[0006] In some respects, the ring surrounds a central axis. In various configurations, the body of the ring extends axially relative to the central axis. In some configurations, the flange is disposed transversely to one of the first and second distal edges. For example, the flange is disposed transversely to the first distal edge and extends toward the central axis such that a portion of the flange overlaps with a portion of the component. In other configurations, the flange is axially disposed relative to the central axis from one of the first and second distal edges.

[0007] In various configurations, the body of the ring includes a plurality of first corrugations disposed between a first distal edge and a second distal edge, and the flange includes second corrugations.

[0008] In other aspects, the housing defines a hole along the central axis. In some configurations, the component includes a bearing disposed in the hole, and a ring is disposed radially between the bearing and the housing relative to the central axis.

[0009] In various configurations, the bearing includes a first race fixed to the housing and a second race rotatable about a central axis relative to the first race. In some configurations, the body of the ring is disposed between the first race and the housing.

[0010] Furthermore, in another aspect, the housing defines a recess connected to the hole, such that the recess opens into the hole and faces the central axis. In various configurations, the body of the ring is disposed within the recess.

[0011] According to another aspect, the housing defines a path connecting to the recess, and a flange is disposed in this path to fix the body of the ring relative to the housing and the first seat ring. In some configurations, the path extends axially relative to a central axis, and the flange extends axially into the path relative to one of the first and second distal edges. In other configurations, the path extends both axially and radially relative to a central axis, and the flange extends both axially and radially into the path from one of the first and second distal edges.

[0012] According to another aspect, the components include a shaft and bearings that support the rotation of the shaft, and the rotation of the shaft creates a high-load area on the bearings. Typically, the body of the ring is positioned along the high-load area to maximize sound attenuation in response to shaft operation.

[0013] In some configurations, the body of the ring includes a first end and a second end, which are spaced apart from each other to define an opening between them, such that the body of the ring is discontinuous. For example, the opening is spaced apart from a high-load area.

[0014] In various configurations, the ring body includes a first portion providing a first ring stiffness and a second portion providing a second ring stiffness different from the first ring stiffness. In these configurations, rotation of the shaft creates a first high-load region on the bearing in a first state and a second high-load region on the bearing in a second state. Typically, the first high-load region differs from the second high-load region. In these configurations, the first portion of the body with the first ring stiffness is aligned with the first high-load region to maximize sound attenuation in the first high-load region, and the second portion of the body with the second ring stiffness is aligned with the second high-load region to maximize sound attenuation in the second high-load region.

[0015] According to another embodiment, the flanges are further defined as a plurality of flanges spaced apart from each other, and each of the flanges projects from one of a first distal edge and a second distal edge. In some configurations, each of the flanges is fixed relative to the housing to maintain the position of the body relative to the housing.

[0016] This disclosure also provides a ring coupled to a component and a housing. The ring is configured to dampen sound caused by vibrations in response to operation of the component. The ring includes a body extending to a first distal edge and a second distal edge opposite to each other. The ring includes a flange projecting outwardly from one of the first distal edge and the second distal edge. The body of the ring includes a plurality of first corrugations disposed between the first distal edge and the second distal edge. The flange includes second corrugations. The flange is fixed relative to the housing to maintain the position of the body of the ring relative to the component.

[0017] This disclosure provides a method for attenuating sound that causes vibrations in response to the operation of a component within a housing using a ring. A torque is selected and applied to the ring. The ring's stiffness is determined based on a stiffness-torque curve that maximizes sound attenuation in response to component operation using the selected torque. The ring is manufactured to meet the determined stiffness. The component's profile is manufactured with a torque range exceeding the selected torque applied to the ring. The ring is radially positioned between the component and the housing to attenuate sound in response to component operation.

[0018] This disclosure provides the following technical solutions.

[0019] Technical Solution 1. A noise reduction component, comprising:

[0020] shell;

[0021] A component that is supported by the housing and is movable relative to the housing;

[0022] A ring, which is coupled to the component and the housing, and wherein the ring is configured to dampen sound that causes vibrations in response to operation of the component; and

[0023] The ring includes a flange fixed relative to the housing to maintain the position of the ring relative to the component, which maximizes the attenuation of the sound in response to the operation of the component.

[0024] Technical Solution 2. The noise reduction assembly according to Technical Solution 1, wherein:

[0025] The ring includes a body extending to a first distal edge and a second distal edge opposite to each other; and

[0026] The flange protrudes from one of the first distal edge and the second distal edge.

[0027] Technical Solution 3. The noise reduction assembly according to Technical Solution 2, wherein:

[0028] The component is capable of rotating about a central axis, which creates a high-load area on the component; and

[0029] The flange holds the body of the ring in position along the high-load region to maximize sound attenuation in response to operation of the component.

[0030] Technical Solution 4. The silencing assembly according to Technical Solution 3, wherein the ring surrounds the central axis, and the body of the ring extends axially relative to the central axis.

[0031] Technical Solution 5. The noise reduction assembly according to Technical Solution 2, wherein the flange is disposed transversely to one of the first distal edge and the second distal edge.

[0032] Technical Solution 6. The noise reduction assembly according to Technical Solution 5, wherein:

[0033] The component is rotatable about a central axis, and the ring revolves around the central axis; and

[0034] The flange is disposed transversely to the first distal edge and extends toward the central axis such that a portion of the flange overlaps with a portion of the component.

[0035] Technical Solution 7. The noise reduction assembly according to Technical Solution 2, wherein:

[0036] The component is rotatable about a central axis, and the ring revolves around the central axis; and

[0037] The flange is axially positioned relative to the central axis from one of the first distal edge and the second distal edge.

[0038] Technical Solution 8. The noise reduction assembly according to Technical Solution 2, wherein:

[0039] The main body of the ring includes a plurality of first corrugations disposed between the first distal edge and the second distal edge; and

[0040] The flange includes a second corrugation.

[0041] Technical Solution 9. The noise reduction assembly according to Technical Solution 1, wherein:

[0042] The housing defines an opening along the central axis;

[0043] The component includes a bearing disposed in the hole; and

[0044] The ring is radially disposed between the bearing and the housing relative to the central axis.

[0045] Technical Solution 10. The noise reduction assembly according to Technical Solution 9, wherein:

[0046] The bearing includes a first race fixed to the housing and a second race rotatable about the central axis relative to the first race.

[0047] The ring includes a body extending to a first distal edge and a second distal edge opposite to each other;

[0048] The flange protrudes from one of the first distal edge and the second distal edge; and

[0049] The main body of the ring is disposed between the first seat ring and the outer shell.

[0050] Technical Solution 11. The noise reduction assembly according to Technical Solution 10, wherein:

[0051] The outer casing defines a recess connected to the hole, such that the recess opens into the hole and faces the central axis; and

[0052] The main body of the ring is disposed in the recess.

[0053] Technical Solution 12. The noise-reducing assembly according to Technical Solution 11, wherein the housing defines a path connected to the recess, and the flange is disposed in the path to fix the position of the body of the ring relative to the housing and the first seat ring.

[0054] Technical Solution 13. The noise reduction assembly according to Technical Solution 12, wherein:

[0055] The path extends axially relative to the central axis; and

[0056] The flange extends axially into the path relative to one of the first distal edge and the second distal edge.

[0057] Technical Solution 14. The noise reduction assembly according to Technical Solution 12, wherein:

[0058] The path extends axially and radially relative to the central axis; and

[0059] The flange extends axially and radially from one of the first distal edge and the second distal edge into the path.

[0060] Technical Solution 15. The noise reduction assembly according to Technical Solution 1, wherein:

[0061] The component includes a shaft and a bearing that supports the rotation of the shaft, and the rotation of the shaft creates a high-load area on the bearing;

[0062] The ring includes a body extending to a first distal edge and a second distal edge opposite to each other; and

[0063] The body of the ring is positioned along the high-load region to maximize the attenuation of the sound in response to the operation of the shaft.

[0064] Technical Solution 16. The noise reduction assembly according to Technical Solution 15, wherein:

[0065] The body of the ring includes a first end and a second end, the first end and the second end being spaced apart from each other to define an opening between the first end and the second end, such that the body of the ring is discontinuous; and

[0066] The opening is spaced apart from the high-load area.

[0067] Technical Solution 17. The noise reduction assembly according to Technical Solution 16, wherein:

[0068] The main body of the ring includes a first portion providing a first ring stiffness and a second portion providing a second ring stiffness different from the first ring stiffness;

[0069] The rotation of the shaft creates a first high-load region on the bearing when it is in a first state, and a second high-load region on the bearing when it is in a second state;

[0070] The first high-load region is different from the second high-load region; and

[0071] The first portion of the body having the first ring stiffness is aligned with the first high-load region to maximize sound attenuation in the first high-load region, and the second portion of the body having the second ring stiffness is aligned with the second high-load region to maximize sound attenuation in the second high-load region.

[0072] Technical Solution 18. The noise reduction assembly according to Technical Solution 1, wherein:

[0073] The ring includes a body extending to a first distal edge and a second distal edge opposite to each other;

[0074] The flange is further defined as a plurality of flanges spaced apart from each other;

[0075] Each of the flanges protrudes from one of the first distal edge and the second distal edge; and

[0076] Each of the flanges is fixed relative to the housing to maintain the position of the body relative to the housing.

[0077] Technical Solution 19. A ring coupled to a component and a housing, wherein the ring is configured to dampen sound causing vibrations in response to operation of the component; the ring comprises:

[0078] The main body extends to the first and second distal edges that are opposite to each other;

[0079] The ring includes a flange that projects outward from one of the first distal edge and the second distal edge;

[0080] The ring's main body includes a plurality of first corrugations disposed between the first distal edge and the second distal edge; and the flange includes second corrugations; and

[0081] The flange is fixed relative to the outer shell to maintain the position of the body of the ring relative to the component.

[0082] Technical Solution 20. A method for attenuating sound that causes vibration in response to the operation of a component inside a housing using a ring, the method comprising:

[0083] Select the torque applied to the ring;

[0084] The stiffness of the ring is determined based on a stiffness-torque curve, which utilizes a selected torque to maximize sound attenuation in response to the operation of the component.

[0085] Manufacture the ring to meet the determined stiffness;

[0086] The contour of the component is manufactured to a torque range higher than the selected torque applied to the ring; and

[0087] The ring is radially disposed between the component and the housing to attenuate the sound in response to operation of the component.

[0088] The detailed description and accompanying drawings or figures support and describe this disclosure, but the scope of this disclosure is defined only by the claims. While some of the best modes and other configurations for carrying out the claims have been described in detail, various alternative designs and configurations exist for practicing the disclosure as defined in the appended claims. Attached Figure Description

[0089] Figure 1 This is a schematic diagram of a portable platform for implementing a noise reduction component as an example.

[0090] Figure 2 This is a schematic partial cross-sectional view of a transmission utilizing a muffler assembly as an example.

[0091] Figure 3 This is a schematic perspective view of the ring, showing two different optional orientations of the flange with dashed lines, and also showing the option of using multiple flanges.

[0092] Figure 4 This is a schematic partial side view of the ring, with dashed lines indicating two different optional folding positions of the flange.

[0093] Figure 5 This is a schematic perspective view of the ring, with dashed lines indicating another optional orientation of the flange, and also showing the option of using multiple flanges.

[0094] Figure 6 It is a schematic partial perspective side view of the shell that defines the recess and path.

[0095] Figure 7 This is a schematic partial cross-sectional view of the ring relative to the bearing.

[0096] Figure 8 It is a schematic partial cross-sectional view of the ring disposed between the housing and the bearing.

[0097] Figure 9 It is a schematic diagram of a controller that includes data on the torque-stiffness curve.

[0098] Figure 10 This is a schematic diagram of the high-load region relative to the ring.

[0099] Figure 11 This is a schematic diagram of two high-load regions relative to the ring. Detailed Implementation

[0100] Those skilled in the art will recognize that all directional references (e.g., above, below, up, up, down, down, top, bottom, left, right, vertical, horizontal, etc.) are used descriptively in the accompanying drawings to aid the reader's understanding and are not intended to limit (e.g., the scope of this disclosure as defined by the appended claims) the scope of the present disclosure.

[0101] Referring to the accompanying drawings (which run through several views, with the same numbers indicating the same or corresponding parts), the muffler assembly 10 is generally located in... Figure 1 The diagram shows an example embodiment of the noise-absorbing assembly 10. Typically, the noise-absorbing assembly 10 can be used to attenuate sound generated or produced via moving parts, as will be discussed further below. That is, for example, the noise-absorbing assembly 10 can be used to attenuate vibrational sound generated or produced via moving parts.

[0102] Specifically, such as Figure 1As shown, the noise reduction assembly 10 can be used on the mobile platform 12. Non-limiting examples of the mobile platform 12 may include vehicles, cars, trucks, motorcycles, off-road vehicles, agricultural vehicles, boats, aircraft, rail vehicles, or any other suitable mobile platform 12. Additionally, the vehicle may be a diesel / gas-powered vehicle, a hybrid vehicle, an electric vehicle, etc. It should be understood that, alternatively, the noise reduction assembly 10 can be used in non-vehicle applications, such as agricultural equipment, fixed platforms, fixed or mobile power plants, robots, conveyors, transport platforms, hard disk drives, air conditioning units, etc. For illustrative purposes, Figure 1 The mobile platform 12 will be described below in the context of a vehicle, without limiting this teaching to general vehicle applications.

[0103] continue Figure 1 The vehicle may include a prime mover 14 and a transmission 16 coupled to the prime mover 14. Typically, the prime mover 14 generates power to propel the vehicle, and the transmission 16 provides directional control of the vehicle (such as forward, reverse, and parking), and may also provide speed and torque conversion of the power from the prime mover 14. The prime mover 14 can be any suitable configuration to generate power for driving the vehicle. For example, non-limiting examples of the prime mover 14 may include one or more of an engine, an internal combustion engine, an electric motor, an electric traction motor, etc.

[0104] Typically, transmission 16 is coupled to prime mover 14 to receive torque output from prime mover 14. Transmission 16 and prime mover 14 may each include a housing 18, the respective housings 18 of which are rigidly attached to each other. Prime mover 14 may include an output shaft 20, and transmission 16 may include an input member 22. The output shaft 20 of prime mover 14 rotates at engine speed (see arrow 24), and the torque from the rotation of output shaft 20 is transmitted to the input member 22 of transmission 16, causing input member 22 to rotate. Non-limiting examples of transmission 16 may include automatic transmissions, dual-clutch transmissions, automatic-manual transmissions, continuously variable transmissions (CVTs), etc.

[0105] Continue Figure 1 The transmission 16 may include a final drive 26 coupled to an input member 22 and an output member 28. The output member 28 transmits output torque (see arrow 30) via the final drive 26 to one or more drive axles 32, and ultimately to a set of wheels 34. Thus, torque from the prime mover 14 is transmitted to the transmission 16, and the transmission 16 outputs torque to drive the wheels 34. It should be understood that the final drive 26 may be driven by a ring-shaped rotatable member, and non-limiting examples of the ring-shaped rotatable member may include a belt or chain.

[0106] Optionally, the vehicle may include a torque converter 36 operable between the output shaft 20 and the input member 22 (see [link]). Figure 1 For example, torque converter 36 can be connected to the output shaft 20 of prime mover 14 and the input member 22 of transmission 16. In this way, the output shaft 20 of prime mover 14 is rotatable to transmit torque via torque converter 36 in the direction to input member 22 of transmission 16. Therefore, torque converter 36 can provide the desired torque multiplication from prime mover 14 to transmission 16 at low speeds.

[0107] Typically, the muffler assembly 10 can be used to attenuate sound generated or produced by moving parts such as the prime mover 14, transmission 16, differential, etc. That is, for example, the muffler assembly 10 can be used to attenuate vibrational sound generated or produced by moving parts such as the prime mover 14, transmission 16, differential, etc. Moving parts may generate noise during operation, and this noise can radiate to other parts; this can be referred to as structurally propagated noise. For example, this noise can radiate to the outside of the prime mover 14, transmission 16, differential, etc., and can then be heard by the occupants of the vehicle, thus requiring attenuation. Therefore, the muffler assembly 10 is designed to attenuate sound generated during the operation of moving parts, such as noise. The muffler assembly 10 can use impedance mismatch to reduce the sound heard due to sound generated or produced by moving parts. For example, moving parts may vibrate at one or more frequencies to generate sound radiated outwards to other locations. Impedance mismatch means that the muffler assembly 10 cancels out one or more frequencies generated by the moving parts, which reduces the sound heard outside the housing 18 of the moving parts. Impedance mismatch allows vibrations of the moving parts to pass through ring 44 of the silencing assembly 10. Ring 44 reduces the sound transmitted to housing 18 in terms of force and amplitude (compared to the sound transmitted to housing 18 without ring 44). This sound reduction is achieved through a higher level of structural flexibility than the vibrations of housing 18 or the moving parts. This impedance mismatch provides a degree of isolation between the moving parts and housing 18.

[0108] refer to Figure 2 and Figure 7 The muffler assembly 10 includes a housing 18 and a component 38 supported via the housing 18. The housing 18 may contain various moving parts, some of which may be component 38. For example, the housing 18 may contain moving parts (including component 38) of the prime mover 14, transmission 16, differential, etc. Thus, the housing 18 may be a transmission housing, engine housing, motor housing, differential housing, etc. In some configurations, such as... Figure 1As best shown, housing 18 may define hole 40 along central axis 42; and depending on the location of hole 40 and the type of housing 18, output shaft 20, input member 22 or output member 28, etc., hole 40 may be provided.

[0109] Component 38 is movable relative to housing 18. In some configurations, component 38 is rotatable about central axis 42. In some configurations, the rotation of component 38 about central axis 42 creates high-load areas HL, HL1, HL2 on component 38 (see...). Figure 10 and Figure 11 For example, torque Ts (see...) Figure 9 The high-load areas HL, HL1, and HL2 can be formed by the rotation of component 38, and the torque Ts forms these high-load areas that generate vibrations, ultimately producing a ring 44 (discussed further below) designed to cancel out sound. In other words, the operation of component 38 produces or generates vibrations that form sounds such as noise that can be heard outside the housing 18. It is desirable to attenuate this sound. Component 38 can be in various configurations, and non-limiting examples of component 38 may include one or more of the following: bearing(s) 46, shaft(s) 47 including output shaft 20, gear(s) 48, or components including input member 22 and output member 28. It should be understood that component 38 may include one or more moving parts.

[0110] like Figures 2 to 5 As best shown, ring 44 can be disposed between certain parts to attenuate sound in response to the operation of moving parts, and thus reduce noise heard outside housing 18. Therefore, the silencing assembly 10 also includes ring 44 coupled to component 38 and housing 18. Typically, ring 44 is configured to attenuate sound in response to the operation of component 38. Thus, movement of component 38 can generate or produce vibrations that form one or more frequencies radiated through housing 18, and ring 44 is designed to cancel one or more of these frequencies to attenuate sound radiated outside housing 18. Therefore, ring 44 can be used to create impedance mismatch.

[0111] In some configurations, ring 44 is radially positioned between component 38 and housing 18 relative to central axis 42. Therefore, sound radiated radially from moving component 38 will be attenuated via ring 44 due to the radial positioning of ring 44 relative to component 38. In other words, ring 44 surrounds component 38 (on the outside) relative to central axis 42.

[0112] refer to Figures 2 to 5 and Figure 8The ring 44 includes flanges 50A, 50B, 50C fixed relative to the housing 18 to maintain the position of the ring 44 relative to the component 38, which maximizes sound attenuation in response to the operation of the component 38. Thus, for example, features of the ring 44 (discussed further below) are located at a position relative to the component 38 to maximize sound attenuation along the high-load regions HL, HL1, HL2 of the component 38.

[0113] like Figures 3 to 5 As best shown, the ring 44 may include a body 52 extending to a first distal edge 54 and a second distal edge 56 opposite to each other. Typically, the body 52 is configured to attenuate sound radially relative to the central axis 42. Furthermore, the body 52 from the first distal edge 54 to the second distal edge 56 is characterized by the absence of any holes, openings, etc., to prevent sound from escaping through the ring 44 via such holes, openings, etc. Flanges 50A, 50B, and 50C hold the body 52 of the ring 44 in position along high-load regions HL, HL1, and HL2 to maximize sound attenuation in response to operation of component 38.

[0114] like Figure 3 and Figure 5 As best shown, the body 52 of the ring 44 may include a first end 58 and a second end 60 spaced apart from each other to define an opening 62 between them, such that the body 52 of the ring 44 is discontinuous. Furthermore, the body 52 from the first end 58 to the second end 60 is characterized by the absence of any holes, openings, etc., to prevent sound from escaping through the ring 44 via such holes, openings, etc. The opening 62 of the ring 44 allows the ring 44 to be compressed during assembly of the ring 44 to the housing 18. Furthermore, the opening 62 of the ring 44 forms a location without the body 52 and therefore a location where sound attenuation is not reduced or not attenuated. Therefore, due to the presence of this opening 62, it is desirable to fix the position of the ring 44 along the high-load regions HL, HL1, HL2 of the component 38 to maximize the attenuation of sound generated or produced during operation of the component 38, which will be discussed further below.

[0115] like Figures 3 to 5 As best shown, the body 52 of the ring 44 may include a plurality of first corrugations 64 disposed between a first distal edge 54 and a second distal edge 56. Furthermore, the first corrugations 64 may be disposed around the body 52 between a first end 58 and a second end 60. The first corrugations 64 project outward and / or inward relative to the body 52. ​​Moreover, the first corrugations 64 are closed. That is, the first corrugations 64 are characterized by having no holes, openings, etc., to prevent sound from escaping through the ring 44 via such holes, openings, etc.

[0116] like Figure 8As best shown, the first side 66A of the first corrugation 64 abuts against the housing 18 or component 38, and the second side 68A of the first corrugation 64 is spaced apart from another of the housing 18 or component 38. For example, in such Figure 8 In one configuration shown, a first side 66A of the first corrugation 64 abuts against the component 38, and a second side 68A of the first corrugation 64 is spaced apart from the housing 18 to present a recess 70A. Furthermore, the first corrugation 64 allows the body 52 to be elastically compressed when one or more forces are applied to the body 52 in response to the operation of the component 38. The first corrugations 64 are configured in a desired arrangement and with a desired spacing from each other to give the body 52 desired stiffness characteristics, which are discussed further below. The first corrugations 64 along the body 52 also serve to control the position of the ring 44 relative to the housing 18 with acceptable positional tolerances.

[0117] Flanges 50A, 50B, and 50C are fixed relative to the housing 18 to maintain the position of the body 52 of the ring 44 relative to the component 38. Typically, as... Figures 3 to 5 As best shown, flanges 50A, 50B, and 50C protrude from one of the first distal edge 54 and the second distal edge 56. More specifically, flanges 50A, 50B, and 50C may protrude outward from one of the first distal edge 54 and the second distal edge 56. In one configuration, flanges 50A, 50B, and 50C protrude from the first distal edge 54. In another configuration, flanges 50A, 50B, and 50C protrude from the second distal edge 56.

[0118] continue Figures 3 to 5 In some configurations, flanges 50A, 50B, and 50C may include a second corrugation 72. Depending on the size of flanges 50A, 50B, and 50C, one or more of the second corrugations 72 may be arranged along flanges 50A, 50B, and 50C. The second corrugations 72 project outward and / or inward relative to flanges 50A, 50B, and 50C. Furthermore, the second corrugations 72 are closed. That is, the second corrugations 72 are characterized by having no holes, openings, etc., to prevent sound from escaping through flanges 50A, 50B, and 50C via such holes, openings, etc.

[0119] like Figure 8 As best shown, the first side 66B of (a plurality of) second corrugations 72 abuts against the housing 18 or component 38, and the second side 68B of (a plurality of) second corrugations 72 is spaced apart from another of the housing 18 or component 38. For example, in such Figure 8 In one configuration shown, the first side 66B of the second corrugation 72 abuts against the member 38, and the second side 68B of the second corrugation 72 is spaced apart from the housing 18 to present a recess 70B. Figure 8In the optimally illustrated configuration, flange 50C bends around the corner of component 38 to present a radial portion 74 and an axial portion 76 of flange 50C. Therefore, flange 50C along the axial portion 76 is configured to axially dampen the sound of moving component 38. The second corrugation 72 also prevents direct contact between the axial surface of bearing 46 and housing 18, eliminating vibration paths via axial contact.

[0120] Typically, ring 44 surrounds central axis 42, and in some configurations, the body 52 of ring 44 is positioned relative to central axis 42 (see [link to relevant documentation]). Figure 2 Extending axially. Flanges 50A, 50B, and 50C can be disposed in various orientations relative to the body 52, and Figure 3 and Figure 5 The different orientations of flanges 50A, 50B, and 50C are shown by dashed lines (double-dotted lines). Reference Figure 3 In some configurations, flange 50A may be laterally positioned relative to one of the first distal edge 54 and the second distal edge 56. In other configurations, ... Figure 3 The flange 50B can be axially disposed relative to the central axis 42 from one of the first distal edge 54 and the second distal edge 56. In some other configurations, such as Figure 5 As shown, flange 50C can be axially and radially disposed relative to the central axis 42 from one of the first distal edge 54 and the second distal edge 56. Regarding Figure 5 In this configuration, flange 50C can be disposed transversely to the first distal edge 54 and extend toward the central axis 42, such that a portion of flange 50C overlaps with a portion of component 38, specifically, radial portion 74 overlaps with one side 78A of component 38, and axial portion 76 overlaps with the other side 78B of component 38 (see [reference]). Figure 8 ). Figure 4 The different folding positions or points 80 along the flanges 50A, 50B, 50C are shown in dashed lines (double-dotted lines) to indicate example positions of the folded flanges 50A, 50B, 50C so as to form a transverse portion relative to one of the first distal edge 54 and the second distal edge 56.

[0121] In some configurations, ring 44 may include a flange 50A, 50B, 50C in any of the orientations just discussed above (see also...). Figure 3 and Figure 5In other configurations, more than one flange 50A, 50B, 50C may be disposed around ring 44. Therefore, optionally, flanges 50A, 50B, 50C may be further defined as a plurality of flanges 50A, 50B, 50C spaced apart from each other. Each of flanges 50A, 50B, 50C may project from one of the first distal edge 54 and the second distal edge 56. Each of flanges 50A, 50B, 50C may be fixed relative to housing 18 to maintain the position of body 52 relative to housing 18. Each of the plurality of flanges 50A, 50B, 50C may be configured as discussed above for a single flange 50A, 50B, 50C. The plurality of flanges 50A, 50B, 50C are shown in dashed lines (double-dotted lines) to indicate the optional feature of using a plurality of flanges 50A, 50B, 50C.

[0122] like Figure 6 and Figure 8 As best shown, the housing 18 may define a recess 82 connected to the hole 40, such that the recess 82 opens into the hole 40 and faces the central axis 42. The body 52 of the ring 44 may be disposed in the recess 82, and the side 78A of the component 38 faces the recess 82. Thus, the housing 18 may present a rear wall 84, a first shoulder 86 and a second shoulder 88 spaced apart from each other, to surround the recess 82 along three sides (see Figure 18). Figure 6 The first distal edge 54 of the main body 52 may face the first shoulder 86, and the second distal edge 56 of the main body 52 may face the second shoulder 88.

[0123] Furthermore, the housing 18 may define a path 90 for connection to the recess 82 (see Figure 6 Flanges 50A, 50B, and 50C are disposed in path 90 to position the body 52 of ring 44 relative to housing 18 and bearing 46 (such as the first race 92 of bearing 46 in some configurations). More specifically, path 90 may be defined through a first shoulder 86 of housing 18. In some configurations, path 90 may extend axially relative to central axis 42, and flange 50B may extend axially into path 90 relative to one of first distal edge 54 and second distal edge 56 (see [link to relevant documentation]). Figure 3 (Flange 50B). In other configurations, path 90 may extend radially relative to central axis 42, and flange 50A may extend laterally into path 90 relative to one of first distal edge 54 and second distal edge 56 (see [link to relevant documentation]). Figure 3 (Flange 50A in the middle). In some other configurations, path 90 may extend axially and radially relative to central axis 42 (see...). Figure 8 And flange 50C extends axially and radially from one of the first distal edge 54 and the second distal edge 56 into path 90 (see...). Figure 5 (Flanges 50C in the middle). The housing 18 can be configured to have a suitable number of paths 90 as discussed above, depending on the number of flanges 50A, 50B, 50C used. It should be understood that if multiple flanges 50A, 50B, 50C are used, the housing 18 can define multiple paths 90, and each of the paths 90 can be in any configuration discussed above for the paths 90.

[0124] In some configurations, as mentioned above, component 38 may include a bearing 46 disposed in bore 40 (see [link to relevant documentation]). Figure 2 and Figure 7 More specifically, the side 78A of the bearing 46 may face the recess 82. For example, the bearing 46 may be used to reduce friction between a rotating shaft 47 (which may include an output shaft 20, an input member 22, or an output member 28, etc.) and a stationary member 38 such as the housing 18. Furthermore, the bearing 46 may support the rotating shaft 47. A ring 44 is radially disposed between the bearing 46 and the housing 18 relative to the central axis 42. Therefore, because the ring 44 is positioned radially between the bearing 46 and the housing 18, the ring 44 attenuates sound traveling radially outward from the bearing 46 toward the housing 18. The ring 44 may be referred to as a radial ring.

[0125] like Figure 8 As best shown, bearing 46 may include a first race 92 fixed to housing 18 and a second race 94 rotatable relative to the first race 92 about a central axis 42, and one or more ball bearings 93 are disposed between the first race 92 and the second race 94. The second race 94 may be positioned closer to the central axis 42 than the first race 92 relative to the central axis 42. The first race 92 may include a side 78A facing the recess 82. Typically, the body 52 of ring 44 may be disposed between the first race 92 and housing 18. Furthermore, the body 52 of ring 44 may abut against the first race 92. When using... Figure 8 When the flange 50C, as shown, bends around the first bearing ring 92, the axial portion 76 of the flange 50 can abut against the first bearing ring 92 along the side portion 96 of the bearing 46. It should be understood that... Figure 8 The length L of the axial portion 76 of the flange 50C is for illustrative purposes only, and the length L of the axial portion 76 may be longer or shorter than shown in the figure. It should also be understood that the length L of the axial portion 76 does not extend beyond the first race 92 relative to the second race 94. That is, the length L of the axial portion 76 does not extend to the rotating parts of the bearing 46, i.e., does not extend to the second race 94. The bearing 46 may be a ball bearing, cylindrical bearing, roller bearing, or any other suitable bearing using races.

[0126] As discussed above, component 38 may include shaft 47, and bearing 46 supports rotation of shaft 47. Therefore, for example, rotation of shaft 47 (which may include output shaft 20, input member 22, or output member 28, etc.) creates high-load areas HL, HL1, HL2 on bearing 46. That is, torque Ts generated due to rotation of shaft 47 forms high-load areas HL, HL1, HL2 transmitted to bearing 46. The first shoulder 86 and second shoulder 88 of housing 18 support higher torques, such as torque Ts, generated via rotation of shaft 47. Reference Figure 10 In some configurations, a high-load region HL is formed on bearing 46. The body 52 of ring 44 is positioned along the high-load regions HL, HL1, HL2 to maximize sound attenuation in response to the operation of shaft 47. Therefore, the opening 62 of ring 44 is spaced apart from the high-load regions HL, HL1, HL2. That is, the opening 62 of ring 44 does not attenuate sound, so it is desirable to position the opening 62 away from the high-load regions HL, HL1, HL2 that generate or produce the sound to be attenuated. Typically, the high-load regions HL, HL1, HL2 can generate a force F equal to or greater than 5 kN. More specifically, as a non-limiting example, the force F generated in the high-load regions HL, HL1, HL2 can be from about 5 kN to about 30 kN.

[0127] Ring 44 can be tuned to a desired frequency to attenuate the sound generated along the high-load regions HL, HL1, HL2. For example, ring 44 can be formed with stiffness Ks (see...). Figure 9 The stiffness is designed to attenuate sound along the high-load regions HL, HL1, HL2. Typically, the stiffness Ks of ring 44 is the degree to which the body 52 of ring 44 resists deformation in response to forces F applied to it from the high-load regions HL, HL1, HL2. Therefore, the stiffer the body 52 of ring 44, the less it deforms in response to force, and vice versa. Thus, the body 52 will vibrate at different rates depending on the stiffness Ks, and therefore, the frequency of ring 44 can be tuned to a desired frequency to attenuate sound generated during the operation of component 38. Thus, the frequency of ring 44 cancels out the frequency of component 38 to attenuate sound radiated from housing 18. Generally, radially and axially reducing the stiffness Ks can help reduce sound heard outside housing 18.

[0128] Optionally, ring 44 can be designed to attenuate multiple frequencies of sound. Therefore, ring 44 can have different stiffness K. s1 K s2 Different regions. For example, refer to Figure 3 The main body 52 of ring 44 may include providing the first ring stiffness K. s1 The first part 98 and provides a stiffness K different from the first ring.s1 The second ring stiffness K s2 Part Two, 100. For example, see reference 100. Figure 11 The rotation of shaft 47 creates a first high-load region HL1 on bearing 46 in the first state, and a second high-load region HL2 on bearing 46 in the second state. The first high-load region HL1 is different from the second high-load region HL2. It has a first ring stiffness K. s1 The first portion 98 of the main body 52 is aligned with the first high-load region HL1 to maximize the attenuation of sound in the first high-load region HL1, and has a second ring stiffness K. s2 The second portion 100 of the main body 52 is aligned with the second high-load region HL2 to maximize sound attenuation in the second high-load region HL2. It should be understood that the ring 44 can be designed with any suitable number of portions 98, 100 with different stiffnesses. It should also be understood that... Figure 5 The ring 44 shown in the figure can have the following characteristics: Figure 3 The different stiffness sections 98 and 100 are shown, and Figure 3 It is possible to have different stiffness parts 98 and 100.

[0129] For example, refer to Figure 11 If ring 44 is being used in transmission 16, then due to the operation of transmission 16 in the first and second states, the first resultant force F in the first direction... r1 Unlike the second resultant force F in the second direction r2 Unlike the second resultant force F in the second direction. r2 The first resultant force F in the first direction r1 A first high-load region HL1 is formed. The first state can be when the transmission 16 operates in forward mode, where the movable platform 12 is being propelled, and the second state can be when the transmission 16 operates in regenerative braking mode, where energy is recovered during braking of the movable platform 12. The recovered energy can be used immediately or stored in an energy storage device for later use. Any change in the load direction can allow for new stiffness on the corresponding reaction arc, and therefore, ring 44 can be designed to have different stiffness K. s1 K s2 Changing the direction of the output torque (such as from forward to coasting or regenerative braking) can change the load direction, which allows for new stiffness on the corresponding reaction arc. Additionally, if multiple prime movers 14 interact with the output shaft 20 (e.g., in hybrid vehicles, where torque from the engine on one gear and torque from the electric motor, also transmitted through different gears via the same output shaft 20, may be at different, unrelated torque levels), then the ring 44 can be designed to have different stiffnesses K. s1K s2 .

[0130] This disclosure also provides a method for attenuating sound using a ring 44 in response to the operation of a component 38 inside the housing 18. Parameters of the ring 44 are determined, and the ring 44 is then formed based on these parameters. For example, a torque Ts applied to the ring 44 is selected. The torque Ts is a given value based on the torque applied to the component 38. For example, the torque Ts from the rotation of the shaft 47 is applied as a force F to the bearing 46, and ultimately as a force F to the ring 44.

[0131] The stiffness Ks of ring 44 is based on the torque-stiffness curve TK (see...). Figure 9 The curve is determined to maximize sound attenuation by using a selected torque Ts in response to the operation of component 38. In other words, to attenuate sound, ring 44 needs to be designed to have the desired stiffness Ks. Figure 9 The graph shows the torque-stiffness curve TK, where the y-axis provides the value of stiffness K and the x-axis provides the value of torque T. Therefore, the stiffness Ks of ring 44 can be found by identifying the value of torque Ts on the torque-stiffness curve TK. The value of stiffness Ks is found at the intersection point 80 on the torque-stiffness curve TK. Continuing... Figure 9 The curve is used to determine the first range X1 of the torque T of ring 44, which is either at or below a selected torque Ts. Based on these values, ring 44 is manufactured to satisfy a defined stiffness Ks.

[0132] The torque-stiffness curve TK is obtained through system analysis to meet the misalignment and deflection requirements of ring 44. The allowable limits of misalignment affect the deflection contact of the gear teeth under load and clearance. Ring 44 can be designed using the finite element method (FEM), which subdivides a large system into smaller, simpler parts, i.e., finite elements. For example, using one or more simple equations to model the finite element model, and then combining them into a larger set of equations to ultimately model the torque-stiffness curve TK, can be called finite element analysis (FEA).

[0133] The transmission 16 may include various gears 48 coupled to the shaft 47, and therefore, as discussed above, component 38 may include gears 48. Gears 48 can be used to change the operating mode of the transmission 16 or the torque output to the wheels 34 by changing the gear ratio of certain gears 48. The outline 102 of gear 48 (see...) Figure 7 It can also be used to tune ring 44 to the desired stiffness Ks. The profile 102 of component 38 (here, one or more gears 48) is manufactured in the second range X2 of torque T (see...). Figure 9(The curve diagram) indicates that this torque is higher than the selected torque Ts applied to ring 44. Therefore, the profile 102 of (the plurality of) gears 48 is designed to have a torque T that is higher than the torque Ts of ring 44 but not greater than the maximum torque Tmax, i.e., within the second range X2 (see the curve diagram). Figure 9 (The curves). For example, to optimize the profile 102 of (multiple) gears 48, system modeling and noise-vibration-roughness (NVH) modeling can be used. System modeling includes the responses of gears 48 and housing 18 as sources. NVH modeling can be used to study and modify the acoustic characteristics, such as noise and vibration characteristics, of component 38 during operations such as movement or rotation of component 38. For example, when component 38 is gear 48, system modeling and NVH modeling can be used to optimize the profile 102 of gear 48 for torque T, and bearing 46 is supported via housing 18.

[0134] Therefore, controller 104 (see Figure 9 The controller 104 can be used to perform Functional Modeling (FEM), which includes Functional Analysis (FEA), System Modeling, and NVH Modeling. Instructions can be stored in memory 106 of the controller 104 and executed automatically via processor 108 of the controller 104 to provide corresponding control and modeling functions. The controller 104 is configured to execute instructions from memory 106 via processor 108. For example, the controller 104 can be a host or distributed system, such as a computer like a digital computer or microcomputer, and the memory 106 can be a tangible, non-transitory computer-readable storage device, such as read-only memory (ROM) or flash memory. The controller 104 may also have random access memory (RAM), electrically erasable programmable read-only memory (EEPROM), a high-speed clock, analog-to-digital (A / D) and / or digital-to-analog (D / A) circuitry, and any required input / output circuitry and associated devices, as well as any required signal conditioning and / or signal buffering circuitry. Therefore, controller 104 may include all software, hardware, memory 106, algorithms, connections, sensors, etc., which are necessary for control, formulaic representation, and / or modeling, for example, the data used for loop 44 and component 38. Thus, the control method that formulaically represents the design of loop 44 and component 38 can be implemented as software or firmware associated with controller 104. Optionally, more than one controller 104 may be used.

[0135] Ring 44 can be manufactured to have one or more of the features discussed above, such as corrugations 64, 72, etc., and will not be repeated. After ring 44 is manufactured to have the desired stiffness Ks and the orientation of flanges 50A, 50B, 50C, ring 44 is radially disposed between component 38 and housing 18 to attenuate sound in response to operation of component 38. For example, in some configurations, body 52 may be disposed in recess 82 of housing 18 before bearing 46 is placed relative to housing 18. Due to the discontinuous configuration of body 52, ring 44 can be compressed or squeezed, which shrinks the outer diameter of ring 44 and allows ring 44 to be inserted into hole 40 of housing 18 and aligned with recess 82. Flanges 50A, 50B, 50C of ring 44 are disposed in path 90 of housing 18, and once body 52 is aligned with recess 82, ring 44 is released to house body 52 within recess 82 and at least partially decompress ring 44. After the ring 44 is positioned in the recess 82 of the housing 18, a component 38, such as a bearing 46, can be press-fitted into the housing 18 within the bore 40 of the housing 18 until the desired compressive load is applied to the ring 44.

[0136] It should be understood that the order or sequence of performing this method is for illustrative purposes, and other orders or sequences are also within the scope of this teaching.

[0137] While the best mode and other configurations for implementing this disclosure have been described in detail, those skilled in the art to which this disclosure pertains will recognize various alternative designs and configurations for practicing this disclosure within the scope of the appended claims. Furthermore, the features of the configurations shown in the drawings or the various configurations mentioned in this specification are not necessarily to be construed as independent of each other. Rather, it is possible that each feature described in one example of a configuration may be combined with one or more other desired features from other configurations, resulting in other configurations that are not described in words or by reference to the drawings. Therefore, such other configurations fall within the framework of the appended claims.

Claims

1. A noise reduction assembly, comprising: shell; A component that is supported by the housing and is movable relative to the housing; A ring, which is coupled to the component and the housing, and wherein the ring is configured to dampen sound that causes vibrations in response to operation of the component; and The ring includes a flange fixed relative to the housing to maintain the ring's position relative to the component, which maximizes sound attenuation in response to operation of the component. The ring includes a body extending to a first distal edge and a second distal edge opposite to each other; The flange protrudes from one of the first distal edge and the second distal edge; The main body of the ring includes a plurality of first corrugations disposed between the first distal edge and the second distal edge; and The flange includes a second corrugation.

2. The noise reduction assembly according to claim 1, wherein: The component is capable of rotating about a central axis, which creates a high-load area on the component; and The flange holds the body of the ring in position along the high-load region to maximize sound attenuation in response to operation of the component.

3. The noise reduction assembly according to claim 2, wherein, The ring surrounds the central axis, and the body of the ring extends axially relative to the central axis.

4. The noise reduction assembly according to claim 1, wherein, The flange is positioned transversely to one of the first distal edge and the second distal edge.

5. The noise reduction assembly according to claim 4, wherein: The component is rotatable about a central axis, and the ring revolves around the central axis; and The flange is disposed transversely to the first distal edge and extends toward the central axis such that a portion of the flange overlaps with a portion of the component.

6. The noise reduction assembly according to claim 1, wherein: The component is rotatable about a central axis, and the ring revolves around the central axis; and The flange is axially positioned relative to the central axis from one of the first distal edge and the second distal edge.

7. The noise reduction assembly according to claim 1, wherein: The housing defines an opening along the central axis; The component includes a bearing disposed in the hole; and The ring is radially disposed between the bearing and the housing relative to the central axis.

8. The noise reduction assembly according to claim 7, wherein: The bearing includes a first race fixed to the housing and a second race rotatable about the central axis relative to the first race. The main body of the ring is disposed between the first seat ring and the outer shell.

9. The noise reduction assembly according to claim 8, wherein: The outer casing defines a recess connected to the hole, such that the recess opens into the hole and faces the central axis; and The main body of the ring is disposed in the recess.

10. The noise reduction assembly according to claim 9, wherein, The housing defines a path connecting to the recess, and the flange is disposed in the path to fix the position of the body of the ring relative to the housing and the first seat ring.

11. The noise reduction assembly according to claim 10, wherein: The path extends axially relative to the central axis; and The flange extends axially into the path relative to one of the first distal edge and the second distal edge.

12. The noise reduction assembly according to claim 10, wherein: The path extends axially and radially relative to the central axis; and The flange extends axially and radially from one of the first distal edge and the second distal edge into the path.

13. The noise reduction assembly according to claim 1, wherein: The component includes a shaft and a bearing that supports the rotation of the shaft, and the rotation of the shaft creates a high-load area on the bearing; The body of the ring is positioned along the high-load region to maximize the attenuation of the sound in response to the operation of the shaft.

14. The noise reduction assembly according to claim 13, wherein: The body of the ring includes a first end and a second end, the first end and the second end being spaced apart from each other to define an opening between the first end and the second end, such that the body of the ring is discontinuous; and The opening is spaced apart from the high-load area.

15. The noise reduction assembly according to claim 14, wherein: The main body of the ring includes a first portion providing a first ring stiffness and a second portion providing a second ring stiffness different from the first ring stiffness; The rotation of the shaft creates a first high-load region on the bearing when it is in a first state, and a second high-load region on the bearing when it is in a second state; The first high-load region is different from the second high-load region; and The first portion of the body having the first ring stiffness is aligned with the first high-load region to maximize sound attenuation in the first high-load region, and the second portion of the body having the second ring stiffness is aligned with the second high-load region to maximize sound attenuation in the second high-load region.

16. The noise reduction assembly according to claim 1, wherein: The flange is further defined as a plurality of flanges spaced apart from each other; Each of the flanges is fixed relative to the housing to maintain the position of the body relative to the housing.

17. A ring connecting a component and a housing, wherein, The ring is configured to attenuate sound that causes vibrations in response to operation of the component; the ring includes: The main body extends to the first and second distal edges that are opposite to each other; The ring includes a flange that projects outward from one of the first distal edge and the second distal edge; The ring's main body includes a plurality of first corrugations disposed between the first distal edge and the second distal edge; and the flange includes second corrugations; and The flange is fixed relative to the outer shell to maintain the position of the body of the ring relative to the component.

18. A method for attenuating sound that causes vibration in response to the operation of a component inside a housing using a ring, the method comprising: Select the torque applied to the ring; The stiffness of the ring is determined based on a stiffness-torque curve, which utilizes a selected torque to maximize sound attenuation in response to the operation of the component. Manufacture the ring to meet the determined stiffness; The contour of the component is manufactured with a torque range higher than the selected torque applied to the ring; and The ring is radially disposed between the component and the housing to attenuate the sound in response to operation of the component.

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