JP2023114289A - component - Google Patents

Abstract

To provide a component capable of improving durability.SOLUTION: A component for a human-powered vehicle includes a metal housing configured so as to be attached to a support member of the human-powered vehicle. The housing includes: at least one first part containing a first metallic material; and at least one second part which contains a second metallic material different from the first metallic material, has a composition different from the composition of the first part, and is formed integrally with the at least one first part. A minimum thickness of the at least one first part and a minimum thickness of the at least one second part are each equal to or greater than 2 mm.SELECTED DRAWING: Figure 7

Description

The present disclosure relates to components.

DE 10 2005 010 000 A1 discloses a component for a man-powered vehicle having a housing.

Japanese Patent Application Laid-Open No. 2017-24700

One of the purposes of the present disclosure is to provide a component that can improve usability.

A component according to the first aspect of the present disclosure is for a human powered vehicle. The component comprises a metal housing configured to be attached to a support member of said manpowered vehicle. The housing includes at least one first portion comprising a first metallic material and a second metallic material different from the first metallic material, different in composition from the first portion, and at least one second metallic material. and at least one second portion integrally formed with the one portion. The minimum thickness of the at least one first portion and the minimum thickness of the at least one second portion are each 2 mm or more.

The component of the first side can constitute a housing in which two kinds of parts made of metal materials with different compositions are integrally formed according to the application, so convenience is improved.

A component of the second aspect according to the first aspect, wherein said at least one first portion comprises a mixing section in which said first metallic material and said second metallic material are mixed at a boundary with said at least one second portion. including.

Since the component of the second side is integrally formed of the first portion and the second portion through the mixing portion, the first portion including the first metal member and the second portion including the second metal member Separation can be suppressed.

A component of the third aspect according to the second aspect, wherein the at least one first portion has a proportion of the first metallic material and the second metallic material depending on the distance from the at least one second portion. different.

The components of the third aspect allow the properties of the first portion to be changed depending on the distance from the second portion.

A component of the fourth aspect according to the third aspect, wherein said at least one first portion has a ratio of said first metallic material and said second metallic material depending on the distance from said at least one second portion. change continuously.

According to the component of the fourth side, separation of the first portion and the second portion can be further suppressed.

A fifth aspect of the component according to any one of the first to fourth aspects, wherein said at least one first portion comprises a contact portion with which a metal member contacts. The metal member is made of a material different from the second metal material.

According to the component of the fifth side, contact between the metal member and the second portion can be prevented. The component can prevent deterioration of the second portion due to contact with metal members.

A component of the sixth aspect according to the fifth aspect, wherein the difference between the ionization propensities of the first metallic material and the metallic member is less than the difference between the ionization propensities of the second metallic material and the metallic member. is also small.

According to the component of the sixth aspect, it is possible to suppress the occurrence of electric corrosion due to metal members.

The proportion of the first metallic material is greater than the second metallic material in the contact portion of the component of the seventh side according to the sixth side.

According to the component of the seventh aspect, it is possible to further suppress the occurrence of electrolytic corrosion due to metal members.

The component of the eighth aspect according to any one of the fifth to seventh aspects, wherein said first metallic material comprises any one of iron and aluminum. The second metal material includes a magnesium alloy.

According to the component of the eighth aspect, it is possible to suppress the occurrence of electrolytic corrosion in the second portion. The component can have a lighter housing due to the second metal material.

A component of a ninth aspect according to any one of the fifth to eighth aspects, wherein the housing is formed with at least one first hole into which a first attachment member for attaching the housing to the support member is inserted. . The metal member is the first mounting member. The at least one first hole is formed in the first portion.

According to the component of the ninth aspect, it is possible to suppress the occurrence of electrolytic corrosion at the mounting location of the housing with respect to the support member.

The component of the tenth aspect according to any one of the fifth to ninth aspects, wherein said housing has at least one second hole through which a second attachment member for attaching said housing to said support member is inserted via a bushing. is formed. The metal member is the bush. The at least one second hole is formed in the first portion.

According to the component of the tenth aspect, when the component is attached to the housing via the bush, it is possible to suppress the occurrence of electric corrosion due to the bush.

A component of the eleventh aspect according to the tenth aspect, wherein said second attachment member is a bolt having an external thread. The bush is formed with a female threaded portion that is coupled to the male threaded portion of the bolt. The bushing is movable along the axial direction of the at least one second hole when the housing is attached to the support member by the bolt.

According to the component of the eleventh aspect, the occurrence of electric corrosion due to the bush can be suppressed, and the occurrence of looseness between the component and the support member can be suppressed due to the bush. For example, the component can restrain deformation of the housing and deformation of the support member when the housing is attached to the support member by bolts.

A component of the twelfth aspect according to the eleventh aspect, wherein the housing includes: At least one recess is formed extending along the radial direction of the at least one second hole. The bushing comprises at least one protrusion inserted into the at least one recess.

According to the twelfth side component, it is possible to prevent the bush from coming off the housing. When the bolt is rotated, the component can constrain bushing rotation relative to bolt rotation.

In the component of the thirteenth aspect according to any one of the ninth to twelfth aspects, the specific gravity of said second metallic material is greater than the specific gravity of said first metallic material.

The component of the thirteenth aspect makes it possible to reduce the weight of the component whose housing is composed only of the second metal material.

In the component of the fourteenth side according to any one of the first to thirteenth sides, the at least one first portion covers the second portion such that the at least one second portion is not exposed to the outside.

According to the component of the fourteenth aspect, adhesion of, for example, water and snow-melting agent to the second portion can be suppressed. The component can, for example, limit deterioration of the second portion by water, snow melting agents, and the like.

A component of the fifteenth aspect according to the first aspect, wherein said at least one first portion comprises two first portions. At least part of the second portion is disposed between the two first portions.

According to the component of the fifteenth aspect, deterioration of the second portion can be further suppressed.

A component of the sixteenth aspect according to the fifteenth aspect, wherein the thermal conductivity of said second metallic material is greater than the thermal conductivity of said first metallic material.

According to the component of the sixteenth aspect, the heat dissipation amount of the housing per unit time can be increased. The component can, for example, suppress the temperature rise of parts housed in the housing.

In the component of the seventeenth aspect according to the fifteenth or sixteenth aspects, said at least one first portion is arranged closer to the outer surface of said housing than said at least one second portion.

According to the component of the seventeenth aspect, it is possible to suppress deterioration of the second portion and increase the amount of heat released from the housing per unit time.

The component of the eighteenth aspect according to any one of the fifteenth to seventeenth aspects, wherein said second metallic material comprises copper.

The component of the eighteenth aspect allows the housing to dissipate more heat per hour. The component can suppress the temperature rise of the parts housed in the housing.

The component of the nineteenth aspect according to any one of the fifteenth to eighteenth aspects, wherein said first metallic material comprises at least one of iron, aluminum and magnesium.

According to the component of the nineteenth aspect, the strength of the component can be increased.

A component of a twentieth aspect according to any one of the first to nineteenth aspects, wherein said housing is formed by additive manufacturing.

The component of the twentieth aspect can reduce the number of parts. The component can be formed integrally with the first part and the second part for complex shaped components.

The components for human powered vehicles of the present disclosure provide enhanced convenience.

FIG. 1 is a side view of a human-powered vehicle according to the first embodiment. 2 is a front view of a component according to the first embodiment; FIG. FIG. 3 is a sectional view taken along line III--III in FIG. FIG. 4 is an exploded perspective view of a component and a support member according to the first embodiment; FIG. 5 is a plan view of components and support members according to the first embodiment. 6 is a sectional view taken along line VI-VI of FIG. 5. FIG. FIG. 7 is a schematic diagram for explaining the second mounting portion according to the first embodiment. FIG. 8 is a schematic diagram for explaining the first attachment portion according to the first embodiment. FIG. 9 is a schematic diagram illustrating a second mounting portion according to the second embodiment. FIG. 10 is a schematic diagram of the XX section of FIG. FIG. 11 is a schematic diagram explaining a housing according to a modification. FIG. 12 is a schematic diagram explaining a housing according to a modification. FIG. 13 is a schematic diagram explaining a housing according to a modification.

<First Embodiment>
A manpowered vehicle 10 is described with reference to FIG. The manpowered vehicle 10 has a manpowered vehicle component 40 . Component 40 is, for example, a drive unit. The manpowered vehicle 10 is a vehicle that has at least one wheel and can be driven by at least manpower. The human powered vehicle 10 includes, for example, mountain bikes, road bikes, city bikes, cargo bikes, and various types of bicycles such as hand bikes and recumbent bikes. The number of wheels that the manpowered vehicle 10 has is not limited. Manpowered vehicles 10 also include, for example, unicycles and vehicles having three or more wheels. The manpowered vehicle 10 is not limited to vehicles that can be driven solely by manpower. The human-powered vehicle 10 includes an E-bike that uses not only the human-powered driving force but also the driving force of an electric motor for propulsion. E-bikes include electrically assisted bicycles whose propulsion is assisted by an electric motor. In the following embodiments, the human-powered vehicle 10 will be described as an electrically assisted bicycle.

A human-powered vehicle 10 includes a crank 12 to which a human-powered driving force is input. Manpowered vehicle 10 further includes wheels 14 and a vehicle body 16 . Wheels 14 include rear wheels 14A and front wheels 14B. Body 16 includes a frame 18 . The crank 12 includes an input shaft 12A and a pair of crank arms 12B provided at both axial ends of the input shaft 12A. The input shaft 12A is rotatable with respect to the frame 18. As shown in FIG. The pair of crank arms 12B are provided at both ends in the axial direction of the input shaft 12A. The input shaft 12A is a crankshaft. A pair of pedals 20 is connected to each crank arm 12B. The rear wheel 14A is driven by the crank 12 rotating. Rear wheel 14A is supported by frame 18 . A drive mechanism 22 connects the crank 12 and the rear wheel 14A. The drive mechanism 22 includes a first drive rotor 24 . The first drive rotor 24 is connected to the input shaft 12A. The first drive rotor 24 includes a sprocket, pulley, or bevel gear. The drive mechanism 22 further includes a second drive rotor 26 and a connecting member 28 . The connecting member 28 transmits the torque of the first drive rotor 24 to the second drive rotor 26 . Coupling member 28 includes, for example, a chain, belt, or shaft.

The second drive rotor 26 is connected to the rear wheel 14A. The second drive rotor 26 includes a sprocket, pulley, or bevel gear. A one-way clutch is preferably provided between the second drive rotor 26 and the rear wheel 14A. The one-way clutch is configured to rotate the rear wheel 14A forward when the second drive rotor 26 rotates forward. The one-way clutch is configured to allow relative rotation between the second drive rotor 26 and the rear wheel 14A when the second drive rotor 26 rotates backward. The first drive rotor 24 includes only one sprocket and the second drive rotor 26 includes multiple sprockets. The first drive rotor 24 may include multiple sprockets. The second drive rotor 26 may include only one sprocket. If at least one of the first drive wheel 24 and the second drive wheel 26 includes multiple sprockets, the manpowered vehicle 10 further includes a derailleur to move the chain between the multiple sprockets. A rear derailleur 27 is provided on the frame 18 .

A front wheel 14</b>B is attached to the frame 18 via a front fork 30 . A handlebar 34 is connected to the front fork 30 via a stem 32 . The rear wheel 14A is connected to the crank 12 by a drive mechanism 22. As shown in FIG. At least one of the rear wheels 14A and the front wheels 14B may be connected to the cranks 12 by a drive mechanism 22.

The manpowered vehicle 10 includes a battery 36 for the manpowered vehicle. Battery 36 includes one or more battery elements. A battery element includes a rechargeable battery. Battery 36 powers component 40 . Battery 36 is preferably communicatively connected to controller 54A of component 40 via an electrical cable or wireless communication device. The battery 36 can communicate with the controller 54A by, for example, power line communication (PLC), CAN (Controller Area Network), or UART (Universal Asynchronous Receiver/Transmitter).

The component 40 according to the first embodiment has an input shaft 12A, a power transmission member 42, an output section 44, a motor 46, and a reducer 48, as shown in FIGS. Component 40 includes an electronic circuit board 50 . The electronic circuit board 50 includes a first circuit board 52 and a second circuit board 54 . The first circuit board 52 includes an inverter circuit 52A. Inverter circuit 52A is configured to supply power to motor 46 . The second circuit board 54 includes a control section 54A. The controller 54A is electrically connected to the inverter circuit 52A. The controller 54A is configured to control the inverter circuit 52A. The electronic circuit board 50 may have one circuit board. Component 40 includes housing 56 . A portion of the input shaft 12A, a portion of the output portion 44, the power transmission member 42, the motor 46, the speed reducer 48, and the electronic circuit board 50 are accommodated in the accommodation space SA of the housing 56. As shown in FIG.

The input shaft 12A is provided so as to pass through the first through hole of the housing 56 and the second through hole of the housing 56 . The input shaft 12A is rotatably supported by the housing 56 via the first bearing 60. As shown in FIG.

The power transmission member 42 is configured to transmit the rotational force input to the input shaft 12A to the output portion 44 . The power transmission member 42 is connected to the input shaft 12A and the output portion 44, respectively. The power transmission member 42 is formed substantially cylindrical. The power transmission member 42 is provided so as to surround the outer peripheral portion of the input shaft 12A. A first end portion 42A of the power transmission member 42 is directly connected to the outer peripheral portion of the input shaft 12A. The first end portion 42A of the power transmission member 42 and the outer peripheral portion of the input shaft 12A are formed with mutually meshing splines. A second end portion 42</b>B of the power transmission member 42 is connected to the output portion 44 via the first one-way clutch 62 .

The first one-way clutch 62 includes a roller clutch, sprag-type clutch, or ratchet-type clutch. When the rotational speed of the input shaft 12A in the predetermined rotational direction exceeds the rotational speed of the output portion 44 in the predetermined rotational direction, the first one-way clutch 62 rotates from the input shaft 12A to the output portion 44 in the predetermined rotational direction. to transmit the rotational force of The predetermined direction of rotation corresponds to the direction of rotation of the input shaft 12A when the input shaft 12A is rotated to move the manpowered vehicle forward. When the rotation speed of the output portion 44 in the predetermined rotation direction exceeds the rotation speed of the input shaft 12A in the predetermined rotation direction, the first one-way clutch 62 rotates from the output portion 44 to the input shaft 12A in the predetermined rotation direction. does not transmit the rotational force of

The output portion 44 is provided so as to pass through the second through hole of the housing 56 . The output portion 44 is formed substantially cylindrical. The output portion 44 has a first rotation axis C1. The output part 44 is rotatably supported by the housing 56 via the second bearing 64 . The input shaft 12A is inserted into the output portion 44 . A third bearing 66 is provided between the output portion 44 and the input shaft 12A. The output portion 44 rotatably supports the input shaft 12A via the third bearing 66. As shown in FIG. At least a portion of the third bearing 66 is provided so as to overlap the second bearing 64 in the direction perpendicular to the first rotation axis C1. A connecting portion 44</b>A that connects the first drive rotor 24 is provided on the outer peripheral portion of the axial end portion of the output portion 44 . The connecting portion 44A has one or more splines extending along the axial direction of the input shaft 12A.

Motor 46 is configured to provide propulsion to manpowered vehicle 10 . The motor 46 has a second rotation axis C2. Motor 46 includes one or more electric motors. The electric motor is for example a brushless motor. An output shaft 46A of the motor 46 is rotatably supported by the housing 56 via a fourth bearing 70. As shown in FIG. An output shaft 46A of the motor 46 is arranged parallel to the input shaft 12A.

The speed reducer 48 includes a first speed reducer 72 , a second speed reducer 74 , and a third speed reducer 76 . The first deceleration section 72 includes a first rotating shaft 72A, a first rotating body 72B, and a second rotating body 72C. The first rotating shaft 72A is arranged parallel to the input shaft 12A. The first rotation shaft 72A has a third rotation axis C3. The first rotating shaft 72A is rotatably supported by the housing 56 via a fifth bearing 78. As shown in FIG. The first rotating body 72B is provided on the output shaft 46A of the motor 46 so as to rotate together with the output shaft 46A of the motor 46. As shown in FIG. The first rotor 72B is a gear having teeth on its outer periphery. The diameter of the second rotating body 72C is larger than the diameter of the first rotating body 72B. The second rotating body 72C is provided on the first rotating shaft 72A so as to rotate together with the first rotating shaft 72A. The second rotor 72C is a gear having teeth on its outer periphery. The second rotating body 72C and the first rotating body 72B are directly connected by meshing the teeth of the second rotating body 72C with the teeth of the first rotating body 72B. Rotation of the output shaft 46A of the motor 46 is decelerated via the first rotating body 72B and the second rotating body 72C and transmitted to the first rotating shaft 72A.

The second deceleration section 74 includes a second rotating shaft 74A, a third rotating body 74B, and a fourth rotating body 74C. The second rotating shaft 74A is arranged parallel to the input shaft 12A. The second rotation shaft 74A has a fourth rotation axis C4. The second rotating shaft 74A is rotatably supported by the housing 56 via a sixth bearing 80. As shown in FIG. The third rotating body 74B is provided on the first rotating shaft 72A so as to rotate together with the first rotating shaft 72A. The third rotating body 74B is a gear having teeth on its outer periphery. The diameter of the fourth rotating body 74C is larger than the diameter of the third rotating body 74B. The fourth rotating body 74C is provided on the second rotating shaft 74A so as to rotate together with the second rotating shaft 74A. The fourth rotating body 74C is a gear having teeth on its outer periphery. The fourth rotating body 74C and the third rotating body 74B are directly connected by meshing the teeth of the fourth rotating body 74C with the teeth of the third rotating body 74B. The rotation of the first rotating shaft 72A is decelerated via the third rotating body 74B and the fourth rotating body 74C and transmitted to the second rotating shaft 74A.

The third deceleration section 76 includes a fifth rotating body 76A and a sixth rotating body 76B. The fifth rotating body 76A is provided on the second rotating shaft 74A. The fifth rotating body 76A is a gear having teeth on its outer periphery. The diameter of the sixth rotating body 76B is larger than the diameter of the fifth rotating body 76A. The sixth rotating body 76B is provided in the output section 44 so as to rotate together with the output section 44 . The sixth rotating body 76B is a gear having teeth on its outer periphery. The sixth rotating body 76B and the fifth rotating body 76A are connected by meshing the gear of the sixth rotating body 76B with the gear of the fifth rotating body 76A via the second one-way clutch 82 . The rotation of the second rotating shaft 74A is decelerated via the fifth rotating body 76A, the second one-way clutch 82, and the sixth rotating body 76B and transmitted to the output section 44.

The speed reducer 48 has a second one-way clutch 82 . The second one-way clutch 82 is provided between the fifth rotating body 76A and the second rotating shaft 74A. The second one-way clutch 82 rotates from the fifth rotating body 76A to the sixth rotation when the rotational speed of the fifth rotating body 76A in the predetermined rotating direction exceeds the rotating speed of the sixth rotating body 76B in the predetermined rotating direction. A rotational force in a predetermined rotational direction is transmitted to the body 76B. When the rotational speed of the sixth rotating body 76B in the predetermined rotational direction exceeds the rotational speed of the fifth rotating body 76A in the predetermined rotational direction, the second one-way clutch 82 rotates the fifth rotating body 76A and the sixth rotating body 76A. The body 76B is relatively rotated. The second one-way clutch 82 rotates from the sixth rotor 76B to the fifth rotation when the rotation speed of the sixth rotor 76B in the predetermined rotation direction exceeds the rotation speed of the fifth rotor 76A in the predetermined rotation direction. It does not transmit the rotational force in the predetermined rotational direction to the body 76A.

As shown in FIGS. 4-6, the housing 56 is configured to be attached to a support member 90 of the rickshaw 10 . The support member 90 is provided on the frame 18, for example. Support member 90 may be integrally formed with frame 18 as a unitary member. The support member 90 may be formed separately from the frame 18 and attached to the frame 18 . Support member 90 may be part of frame 18 . The support member 90 is made of metal, for example. The support member 90 contains, for example, any one of iron and aluminum. The support member 90 is, for example, an aluminum alloy. The support member 90 may be made of resin.

Housing 56 includes a first housing 56A and a second housing 56B. A housing space SA is formed by the first housing 56A and the second housing 56B. The first housing 56A and the second housing 56B are fixed to each other by bolts 92, for example.

Housing 56 has at least one first mounting portion 100 and at least one second mounting portion 102 . In this embodiment, the at least one first attachment part 100 includes three first attachment parts 100 . In this embodiment, the at least one second mounting portion 102 includes three second mounting portions 102 . Each first attachment portion 100 and each second attachment portion 102 are arranged in pairs and protrude from the side portion of the housing 56 . Each first attachment portion 100 and each second attachment portion 102 may be provided on a side portion of the housing 56 . The first attachment portion 100 and the second attachment portion 102 may be integrally formed. A pair of the first mounting portion 100 and the second mounting portion 102 face each other with a predetermined gap in the direction of the first rotation axis C1. Each first mounting portion 100 and each second mounting portion 102 are provided on the first housing 56A. Each first mounting portion 100 and each second mounting portion 102 may be provided on the second housing 56B. One of each first mounting portion 100 and each second mounting portion 102 may be provided on one of the first housing 56A or the second housing 56B. The other of each first attachment portion 100 and each second attachment portion 102 may be provided on the other of first housing 56A or second housing 56B.

At least one first hole 104 is formed in the housing 56 . A first hole 104 is formed in the first mounting portion 100 . At least one first hole 104 is formed in each first mounting portion 100 . A plurality of first holes 104 may be formed in one first mounting portion 100 . A first mounting member 106 is inserted into the first hole 104 . A first attachment member 106 attaches the housing 56 to the support member 90 . The first mounting member 106 is a bolt having a male threaded portion 106a. A female threaded portion 104 a is formed on the inner peripheral wall of the first hole 104 . Female threaded portion 104 a is coupled to male threaded portion 106 a of first mounting member 106 .

At least one second hole 108 is formed in the housing 56 . A second hole 108 is formed in the second mounting portion 102 . At least one second hole 108 is formed in each second mounting portion 102 . A plurality of second holes 108 may be formed in one second mounting portion 102 . A second mounting member 110 is inserted into the second hole 108 via a bush 112 . A second attachment member 110 attaches the housing 56 to the support member 90 . The second mounting member 110 is a bolt having a male threaded portion 110a. A bush 112 is press-fitted into the second hole 108 .

Bushing 112 includes a cylindrical portion 112a and a flange portion 112b. At least part of the cylindrical portion 112 a is press-fitted into the second hole 108 . The bushing 112 is formed with a female threaded portion 112c. The female threaded portion 112 c is coupled to the male threaded portion 110 a of the second mounting member 110 . The female threaded portion 112c is formed on the inner peripheral wall of the cylindrical portion 112a. The flange portion 112b is provided at the end of the cylindrical portion 112a opposite to the end press-fitted into the second hole 108 . The flange portion 112b protrudes in the radial direction of the tubular portion 112a from the outer peripheral wall of the tubular portion 112a. The diameter of the outer peripheral wall of the flange portion 112b is larger than the diameter of the outer peripheral wall of the cylindrical portion 112a. The bushing 112 is movable along the axial direction of the at least one second hole 108 when the housing 56 is attached to the support member 90 by the second attachment member 110 . If there is a gap in the axial direction of the second hole 108 between the support member 90 and the second mounting portion 102, the second mounting member 110 is inserted into the bushing 112, and the second mounting member 110 is tightened. , the bush 112 moves toward the support member 90 . The bushing 112 remains press-fitted into the second hole 108 . Bushing 112 moves to a position where it contacts support member 90 . The contact of the bushing 112 with the support member 90 suppresses rattling between the support member 90 and the housing 56 in the axial direction of the second hole 108 . The deformation of the support member 90 is suppressed by the movement of the bush 112 along the axial direction of the second hole 108 . Bushing 112 includes, for example, aluminum and iron. The bush 112 is made of, for example, an aluminum alloy.

Housing 56 is made of metal. As shown in FIGS. 7 and 8, housing 56 includes at least one first portion 120 and at least one second portion 122 . At least one first portion 120 includes a first metallic material. The first metal material includes any one of iron and aluminum. The minimum thickness of at least one first portion 120 is 2 mm or more. At least one second portion 122 comprises a second metallic material. The second metallic material is different than the first metallic material. At least one second portion 122 is different in composition from first portion 120 and integrally formed with at least one first portion 120 . The specific gravity of the second metal material is greater than the specific gravity of the first metal material. The second metal material includes magnesium alloy. The minimum thickness of at least one second portion 122 is 2 mm or more. Housing 56 is formed by additive manufacturing. First portion 120 and second portion 122 are integrally formed by additive manufacturing as a one-piece component. For example, after the housing 56 has the first portion 120 and the second portion 122 respectively molded, the first portion 120 and the second portion 122 are attached or fastened with fastening members such as bolts. It does not include configurations formed by

For example, as shown in FIG. 7, at least one second hole 108 is formed in the first portion 120 at the second mounting portion 102 into which the bushing 112 is press fit. The first portion 120 is provided on the inner peripheral side defining the second hole 108 of the second mounting portion 102 . The first portion 120 is provided at a position facing the flange portion 112b of the bushing 112 in the second mounting portion 102 . A portion of the first portion 120 facing the flange is formed in an annular shape having a diameter larger than the diameter of the flange portion 112b.

For example, as shown in FIG. 8, at least one first hole 104 is formed in the first portion 120 in the first mounting portion 100 into which the first mounting member 106 is inserted. The first portion 120 is provided on the inner peripheral side that defines the first hole 104 of the first mounting portion 100 . For example, the first portion 120 is provided on the entire outer surface side of the first mounting portion 100 . In the first attachment portion 100, the first portion 120 is provided only on the inner peripheral side forming the first hole 104 of the first attachment portion 100 and on the position of the first attachment portion 100 where the support member 90 abuts. may be In the second attachment portion 102 , the first portion 120 may be provided on the entire outer surface side of the second attachment portion 102 , for example, like the first attachment portion 100 .

At least one first portion 120 includes a contact portion 120a. A metal member contacts the contact portion 120a. The contact portion 120a includes a portion of the housing 56 that may come into contact with a metal member. In the contact portion 120a, the proportion of the first metal material is higher than that of the second metal material. For example, the contact portion 120a is composed only of the first metal material. Bush 112 is a metal member. The first mounting member 106 is a metal member. In this embodiment, the member that contacts the housing 56 is a metal member. For example, support member 90 may include a metal member. The metal member is made of a material different from that of the second metal member. The metal member includes, for example, a first metal material. The difference between the ionization tendency of the first metal material and the ionization tendency of the metal member is smaller than the difference between the ionization tendency of the second metal material and the metal member.

At least one first portion 120 includes a mixing portion 120b at its interface with at least one second portion 122 . For example, the mixing portion 120b mixes the first metal material and the second metal material. The at least one first portion 120 has different proportions of the first metallic material and the second metallic material depending on the distance from the at least one second portion 122 . For example, the at least one first portion 120 has a continuously varying ratio of the first metallic material and the second metallic material depending on the distance from the at least one second portion 122 . For example, the mixing portion 120b of the at least one first portion 120 has a higher ratio of the first metal material and a lower ratio of the second metal material as the distance from the second portion 122 increases. The distance from the second portion 122 includes the distance from the second portion 122 to the contact portion 120a. The distance from second portion 122 includes the distance from second portion 122 to the outer surface of housing 56 . The mixing portion 120b may include a plurality of layers in which the proportions of the first metal member and the second metal member are different in stages.

<Second embodiment>
A component 130 according to a second embodiment will now be described with reference to FIGS. A description of the same configuration as the component 40 according to the first embodiment is omitted. The housing 132 of the component 130 according to the second embodiment is formed with at least one recess 136 in its inner circumference defining at least one second hole 134 . A recess 136 is formed in a second mounting portion 138 of the housing 132 . The at least one recess 136 extends radially along the at least one second hole 134 at an intermediate portion between the axial ends of the at least one second hole 134 . For example, two recesses 136 are formed in the second hole 134 . The two recesses 136 are provided so as to have uniform intervals in the circumferential direction of the second hole 134 . The number of recesses 136 is not limited to two. The number of recesses 136 may be one, or three or more. The first portion 144 is provided on the inner peripheral side of the second mounting portion 138 defining the recess 136 .

Bushing 140 includes at least one protrusion 142 . At least one protrusion 142 is inserted into at least one recess 136 . Bushing 112 is formed with housing 132 by additive manufacturing. The bush 112 is restricted from moving in the axial direction of the second hole 134 by forming the projection 142 inserted into the recess 136 . The length of the protrusion 142 in the axial direction of the second hole 134 is shorter than the length of the recess 136 in the axial direction of the second hole 134 . The axial length of the protrusion 142 and the axial length of the recess 136 are configured such that the bush 140 can suppress rattling of the housing 132 with respect to the support member 90 . The bushing 140 is formed by inserting the projecting portion 142 into the recessed portion 136 to restrict movement of the second hole 134 in the circumferential direction.

<Modification>
In a modified component 150, as shown in FIG. 11, at least one first portion 152 may cover at least one second portion 154 so that at least one second portion 154 is not exposed to the outside. For example, the first portion 152 covers the second portion 154 with the mixing portion 152a. In FIG. 11, the entire outer peripheral surface of the portion of the housing 56 excluding the first attachment portion 100 and the second attachment portion 102 is formed by the mixing portion 152a. The mixing portion 152a of the housing 56 may be formed only on a portion of the housing 56 that contacts the support member 90, or may be formed on a portion of the housing 56 that faces the support member 90 only. A portion of the first attachment portion 100 excluding the proximal end portion, or the entire first attachment portion 100 may include only the first portion 152 . A portion of the second attachment portion 102 excluding the base end portion, or the entire second attachment portion 102 may include only the first portion 152 . The proportion of the first metal material in the first portion 152 is greater than the proportion of the first metal material in the mixed portion 152a. For example, the first portion 152 may be composed only of the first metal material. The first portion 152, which has a greater proportion of the first metal material than the mixed portion 152a, includes an inner perimeter defining the first hole 104 and the second hole 108. As shown in FIG.

In the component 160 according to the modification, as shown in FIG. 12, at least one first portion 162 does not have a mixing section, and at least one second portion 164 is not exposed to the outside. cover. The first attachment portion 100 and the second attachment portion 102 are configured by a first portion 162 . In FIG. 12 , the first portion 162 forms the entire outer peripheral surface of the portion of the housing 56 excluding the first attachment portion 100 and the second attachment portion 102 . Housing 166 includes at least one peel-off prevention portion 168 . The peel prevention portion 168 prevents separation of the first portion 162 and the second portion 164 . For example, the anti-peeling portion 168 has an anchor structure in which a portion of the second portion 164 protrudes inside the first portion 162 . The detachment prevention portion 168 may have an anchor structure in which a portion of the first portion 162 protrudes into the second portion 164 . The detachment prevention portion 168 is configured so as not to be exposed to the outside. The detachment prevention portion 168 is provided, for example, at a thick portion of the housing 166 . The detachment prevention portion 168 is provided, for example, at a location where at least one of the first attachment portion 100 and the second attachment portion 102 is provided.

The housing 172 of the modified component 170, as shown in FIG. 13, includes at least one first portion 174 including two first portions 174a, 174b. At least a portion of the second portion 176 is disposed between the two first portions 174a, 174b. At least one first portion 174 a is positioned closer to the outer surface of housing 172 than at least one second portion 176 . First portion 174 includes a first metallic material. Second portion 176 includes a second metallic material. In the modified housing 172, the thermal conductivity of the second metal material is higher than the thermal conductivity of the first metal material. The first metal material includes at least one of iron, aluminum and magnesium. The second metal material contains copper. Heat generated in at least one of the motor 46 housed in the housing 172 and the electronic circuit board 50 is radiated to the outside through the housing 172 .

As used herein, the phrase "at least one" means "one or more" of the desired option. As an example, the expression "at least one" as used herein means "only one option" if the number of options is two, or "both of the two options". As another example, the expression "at least one" used in this specification means "only one option" if the number of options is three or more, or "any combination of two or more options ” means.

DESCRIPTION OF SYMBOLS 10... Manpowered vehicle, 40... Component, 56... Housing, 90... Support member, 100... First attachment part, 102... Second attachment part, 104... First hole, 104a... Female screw part, 106... First attachment member , 106a... male screw portion, 108... second hole, 110... second mounting member, 110a... male screw portion, 112... bush, 112c... female screw portion, 120... first portion, 120a... contact portion, 120b... mixing portion, 122 Second portion 130 Component 132 Housing 134 Second hole 136 Recessed portion 138 Second mounting portion 140 Bushing 142 Protruding portion 144 First portion 150 Component 152 First part 154 Second part 152a Mixing part 160 Component 162 First part 164 Second part 166 Housing 168 Separation prevention part 170 Component 172 Housing 174...first part, 174a...first part, 174b...first part, 176...second part

Claims (20)

A component for a human powered vehicle comprising:
a metal housing configured to be attached to a support member of the manpowered vehicle;
The housing is
at least one first portion comprising a first metallic material;
at least one second portion comprising a second metallic material different from the first metallic material, different in composition from the first portion, and integrally formed with the at least one first portion. ,
The component, wherein the minimum thickness of said at least one first portion and the minimum thickness of said at least one second portion are each greater than or equal to 2 mm. 2. The component of claim 1, wherein said at least one first portion includes a mixing section in which said first metallic material and said second metallic material are mixed at an interface with said at least one second portion. 3. The component of claim 2, wherein the at least one first portion has different proportions of the first metallic material and the second metallic material depending on the distance from the at least one second portion. 4. The at least one first portion according to claim 3, wherein the ratio of the first metallic material and the second metallic material varies continuously depending on the distance from the at least one second portion. component of. The at least one first portion includes a contact portion with which the metal member contacts,
A component according to any one of claims 1 to 4, wherein said metallic member is composed of a material different from said second metallic material. 6. The component of claim 5, wherein the difference between the ionization propensities of the first metallic material and the metallic member is less than the difference between the ionization propensities of the second metallic material and the metallic member. 7. The component of claim 6, wherein the contact portion has a greater proportion of the first metal material than the second metal material. The first metal material includes any one of iron and aluminum,
A component according to any one of claims 5 to 7, wherein said second metallic material comprises a magnesium alloy. The housing is formed with at least one first hole into which a first attachment member for attaching the housing to the support member is inserted,
The metal member is the first mounting member,
A component according to any one of claims 5 to 8, wherein said at least one first hole is formed in said first portion. The housing is formed with at least one second hole into which a second attachment member for attaching the housing to the support member is inserted via a bush,
the metal member is the bush,
A component according to any one of claims 5 to 9, wherein said at least one second hole is formed in said first portion. The second mounting member is a bolt having a male thread,
The bushing is formed with a female threaded portion coupled to the male threaded portion of the bolt,
11. The component of claim 10, wherein said bushing is movable along the axial direction of said at least one second hole when said bolt attaches said housing to said support member. The housing has an inner circumference defining the at least one second hole, midway between the axial ends of the at least one second hole, and radially in the at least one second hole. forming at least one recess extending along;
12. The component of claim 11, wherein said bushing comprises at least one protrusion inserted into said at least one recess. A component according to any one of claims 9 to 12, wherein the specific gravity of said second metallic material is greater than the specific gravity of said first metallic material. The component according to any one of claims 1 to 13, wherein said at least one first portion covers said second portion such that said at least one second portion is not exposed to the outside. the at least one first portion comprises two first portions;
2. The component of Claim 1, wherein at least a portion of said second portion is disposed between said two first portions. 16. The component of claim 15, wherein the thermal conductivity of said second metallic material is greater than the thermal conductivity of said first metallic material. 17. A component according to claim 15 or 16, wherein the at least one first portion is located closer to the outer surface of the housing than the at least one second portion. A component according to any one of claims 15 to 17, wherein said second metallic material comprises copper. A component according to any one of claims 15 to 18, wherein said first metallic material comprises at least one of iron, aluminum and magnesium. A component according to any preceding claim, wherein the housing is formed by additive manufacturing.

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