Seat, motor assembly and transmission device

Abstract

The utility model provides a seat, a motor assembly and a transmission device. The seat comprises a seat cushion, a seat cushion body and a seat cushion body, the backrest is rotatably connected to the seat cushion; the backrest is driven by a motor assembly so as to adjust an included angle between the backrest and the cushion; the motor assembly comprises a transmission device and a motor; the transmission device is arranged to transmit power output by the motor; the transmission device comprises a box body, and a transmission part of the transmission device is mounted in the box body; the motor comprises a motor shell, and functional parts of the motor are supported and fixed by the motor shell; the box body is provided with a first supporting shell which is in the shape of a truncated cone; and the motor shell is connected to the first supporting shell, so that the motor is supported and fixed by the box body.

Description

TECHNICAL FIELD

[0001] The present application relates to a seat, a motor assembly and a transmission device. BACKGROUND

[0002] A seat product, for example a car seat, generally comprises a seat cushion and a backrest; in some solutions, the backrest is rotatable relative to the seat cushion and can be adjusted in angle by a motor assembly.

[0003] In order to improve user experience, the backrest of some solutions has a faster angle adjustment speed; the backrest of some solutions adopts a more comfortable and heavy material; the backrest of some solutions is additionally provided with new functional configurations, such as a massager, a heater, etc., so that the weight of the backrest is increased; the above requirements can make the motor assembly and the motor for adjusting the angle of the backrest output a larger rotational speed and / or torque.

[0004] However, the inventors have found that when using a motor with a larger rotational speed and / or torque, the seat product has problems of poor user experience and reliability, such as vibration, noise, short service life of the motor, etc.

[0005] Therefore, there is a need in the art for a new seat, motor assembly and transmission device to solve one or a combination of the above technical problems. SUMMARY

[0006] The purpose of the present application is to provide a seat.

[0007] Another purpose of the present application is to provide a motor assembly.

[0008] Another purpose of the present application is to provide a transmission device.

[0009] According to a seat of the first aspect of the present application, it comprises: a seat cushion; a backrest rotatably connected to the seat cushion; the backrest is driven by a motor assembly to adjust the included angle between the backrest and the seat cushion; the motor assembly comprises a transmission device and a motor; the transmission device is arranged to transmit the power of the motor; the transmission device comprises a box body, and the transmission components of the transmission device are installed inside the box body; the motor comprises a motor housing, which contains and supports the functional components of the motor; the box body is provided with a first supporting housing in the shape of a truncated cone; the motor housing is connected to the first supporting housing, so that the motor is supported and fixed by the box body.

[0010] The inventors have found that, compared with the motor supporting structure in the form of a column in the comparative solution, Figure 1Compared with a columnar structure, the first supporting shell in a truncated cone shape has better stability, better anti-vibration, anti-impact and anti-deformation capacity, is beneficial to improving the strength and rigidity of the motor assembly and the motor supporting structure, so as to reduce vibration and noise, and bear greater impact load; and compared with a columnar motor supporting structure, the first supporting shell in a truncated cone shape can also provide a larger heat dissipation area and improve heat dissipation efficiency, thereby further improving structural reliability and prolonging motor service life, etc. In addition, the structure optimization of the first supporting shell makes the material usage less and the weight lighter.

[0011] In one or more embodiments, the transmission component of the transmission device comprises: a worm connected coaxially with the output shaft of the motor and capable of being driven synchronously by the rotation output by the output shaft of the motor; a worm wheel engaged with the worm; an input gear connected coaxially with the worm wheel and capable of rotating synchronously with the worm wheel; and an output gear receiving the rotation output by the input gear and outputting the rotation as the output of the transmission device.

[0012] In one or more embodiments, the first side tooth profile of the output gear is configured to have a pressure angle in the range of 17.5° to 18.5°.

[0013] In one or more embodiments, the second side tooth profile of the output gear is configured to have a pressure angle in the range of 14.5° to 15.5°.

[0014] In one or more embodiments, the transmission device further comprises a transmission shaft; the transmission shaft extends in the axial direction of the input gear, and the transmission shaft is integrally formed with the input gear; and the worm wheel is connected to the transmission shaft.

[0015] In one or more embodiments, a key connection is provided between the worm wheel and the transmission shaft.

[0016] In one or more embodiments, the transmission device further comprises an annular gasket; the annular gasket is attached to one side of the input gear in the axial direction and to the other side of the box, so that the input gear is axially compressed.

[0017] In one or more embodiments, the motor outputs a rotational speed of not less than 15000 rpm, and / or the motor outputs a torque of not less than 0.8 N·m.

[0018] According to a second aspect of the present application, a motor assembly comprises a transmission device and a motor, the transmission device is configured to transmit power of the motor; the transmission device comprises a box body, transmission components of the transmission device are installed inside the box body; the motor comprises a motor housing, functional components of the motor are supported and fixed by the motor housing; the box body is provided with a first supporting housing in the shape of a truncated cone; the motor housing is connected to the first supporting housing, so that the motor is supported and fixed by the box body.

[0019] According to a third aspect of the present application, a transmission device comprises a box body, transmission components of the transmission device are installed inside the box body; the box body is provided with a first supporting housing in the shape of a truncated cone, the first supporting housing is used to provide an assembly position of a motor housing; functional components of the motor are supported and fixed by the motor housing; the motor housing is connected to the first supporting housing, so that the motor is supported and fixed by the box body. BRIEF DESCRIPTION OF DRAWINGS

[0020] The above and other features, properties, and advantages of the present application will become more apparent by describing in detail the following embodiments with reference to the attached drawings, in which like reference numerals refer to like elements throughout, it is noted that these drawings are merely examples which are not drawn to scale, and should not be used in interpretation of the scope of protection actually claimed by the present application, in which:

[0021] Figure 1 A structural schematic view of a box body of a transmission device of a comparative solution.

[0022] Figure 2 A structural schematic view of a seat of an embodiment of the present application.

[0023] Figure 3 A structural schematic view of a motor assembly of an embodiment of the present application.

[0024] Figure 4 A structural schematic view of a box body of a transmission device of an embodiment of the present application.

[0025] Figure 5 A structural schematic view of a box body of a transmission device of an embodiment of the present application.

[0026] Figure 6 A structural schematic view of an output gear of an embodiment of the present application.

[0027] Figure 7 An exploded schematic view of a transmission device of an embodiment of the present application.

[0028] REFERENCE NUMERALS:

[0029] 1. a seat;

[0030] 10. motor assembly; 20. cushion; 30. backrest;

[0031] 110. transmission; 1110. housing; 1111. first support shell; 1112. second support shell; 1113. rib plate; 1114. first accommodating cavity; 1115. second accommodating cavity; 1116. third accommodating cavity; 1117. through hole; 112. worm; 113. worm wheel; 114. input gear; 1150. output gear; 1151. first side tooth profile; 1152. second side tooth profile; 116. transmission shaft; 117. key; 118. ring gasket;

[0032] 120. motor; 121. motor housing;

[0033] α1. pressure angle of the first side tooth profile; α2. pressure angle of the second side tooth profile;

[0034] 1111a. columnar structure. DETAILED DESCRIPTION

[0035] Reference will now be made in detail to various embodiments of the present application, examples of which are illustrated in the accompanying drawings and described below. While the present application will be described in conjunction with the exemplary embodiments, it should be understood that the present application is not limited to those exemplary embodiments. On the contrary, the present application is intended to cover all alternatives, modifications, equivalents and other embodiments that can be included within the spirit and scope of the present application as defined by the appended claims.

[0036] The present application uses certain terms to describe the embodiments of the present application. As used in the present application, the following terms are intended to have the following meanings:

[0037] In the following description, the orientation or positional relationship indicated by "upper", "lower", "inner", "outer", "front", "back" or other orientation terms is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or component referred to must have a particular orientation, be constructed and / or implemented in a particular orientation, and therefore cannot be understood as a limitation of the present application. In the present application, the terms "first", "second", etc. are only used for distinguishing description, and cannot be understood as indicating or implying positional relationship or importance order, etc.

[0038] In the following description, unless otherwise clearly indicated or limited, the terms "mount", "connect", "connection", "fixed", and the like, should be interpreted broadly; for example, can be fixed connection, can also be movable connection; can be directly connected, can also be indirectly connected through intermediate medium. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0039] It can be understood that the seat provided by the present application is especially suitable for a car seat, but is not limited thereto, and can also be applied to other applicable occasions, such as seats of other vehicles, seats of theaters and the like, and other seats; the motor assembly, transmission device and the like provided by the present application are especially suitable for angle adjustment of a backrest of a seat, but are not limited thereto, and can also be applied to other applicable occasions requiring output of rotary power, such as angle adjustment of a seat cushion, a leg rest and the like.

[0040] As introduced above, the existing technical problems in the field include but are not limited to: when an electric motor with greater output speed and / or torque is used, the seat product has problems such as poor user experience and reliability, for example, vibration, noise and short service life of the electric motor. Therefore, the inventors of the present application have proposed a seat, a motor assembly and a transmission device to solve one or a combination of the above technical problems.

[0041] Referring to Figures 2 to 5 The present application provides a seat 1, which comprises: a seat cushion 20; a backrest 30 rotatably connected to the seat cushion 20; the backrest 30 is driven by a motor 120 assembly 10 to adjust the included angle between the backrest 30 and the seat cushion 20; the motor 120 assembly 10 comprises a transmission device 110 and a motor 120; the transmission device 110 is arranged to transmit the power of the motor 120; the motor 120 comprises a motor housing 121, and functional components of the motor 120, such as a stator, a rotor and the like, are supported and fixed by the motor housing 121; the transmission device 110 comprises a box body 1110, and transmission components of the transmission device 110 are installed inside the box body 1110; the box body 1110 is provided with a first supporting shell 1111 in the shape of a truncated cone; the motor housing 121 is connected to the first supporting shell 1111, so that the motor 120 is supported and fixed by the box body 1110; specifically, the first supporting shell 1111 is roughly shaped as a curved shell structure, which has a concave part to provide a mounting position for the motor housing 121.

[0042] Compared with the motor supporting structure (such as Figure 1Compared with the cylindrical structure, the truncated conical structure has better stability, better anti-vibration, anti-impact and anti-deformation capability, which is beneficial to improve the strength and rigidity of the motor 120 assembly 10 and the motor supporting structure, so as to reduce vibration and noise, and bear greater impact load. On the other hand, compared with the cylindrical motor supporting structure, the first supporting shell 1111 in the form of a truncated cone can also provide a larger heat dissipation area and improve the heat dissipation efficiency, thereby further improving the structural reliability and prolonging the service life of the motor, etc. In addition, the structure optimization of the first supporting shell 1111 makes the material usage less and the weight lighter.

[0043] As shown in Figure 3 , Figure 7 In one or more embodiments, the transmission component of the transmission device 110 includes: a worm 112 coaxially connected with the output shaft of the motor 120 and capable of being driven synchronously by the rotation output by the output shaft of the motor 120; a worm gear 113 engaged with the worm 112; an input gear 114 coaxially connected with the worm gear 113 and capable of rotating synchronously with the worm gear 113; and an output gear 1150 receiving the rotation output by the input gear 114 and outputting the rotation as the output of the transmission device 110. Specifically, the transmission device 110 is configured to receive the rotation output by the motor 120 and convert it into the required rotation speed and torque, such as the rotation speed and torque required for adjusting the angle of the backrest 30. Optionally, the input gear 114 and the output gear 1150 are engaged and are helical gears.

[0044] As shown in Figure 3 , Figure 4 Optionally, the box body 1110 has a profiling structure so that it matches the transmission components and the like installed inside it; for example, the box body 1110 can be provided with: a first cavity 1114 matching the profile of the worm 112 and the output shaft of the motor 120; a second cavity 1115 matching the profile of the worm gear 113 and the input gear 114; and a third cavity 1116 matching the profile of the output gear 1150. Such design is beneficial to fully utilize the space. Specifically, the wall surface of the third cavity 1116 can also be provided with a through hole 1117 coaxially arranged with the output gear 1150, for allowing other components to pass through and connect with and transmit power to the output gear 1150.

[0045] As shown in Figure 5As shown, in one or more embodiments, the box 1110 is further provided with a second supporting shell 1112; the second supporting shell 1112 is substantially cylindrical and is arranged on the inner side of the circumference of the first supporting shell 1111; the first supporting shell 1111 and the second supporting shell 1112 are joined at the end away from the motor shell 121, and the first supporting shell 1111 and the second supporting shell 1112 are connected by a plurality of, for example, 6, rib plates 1113; in this way, the hollow part of the second supporting shell 1112 is used for the output shaft of the motor 120 to pass through, which on the one hand improves the structural strength of the box 1110 as a whole, and on the other hand can provide support for the motor 120 at the position close to the output shaft, improve the stability of the motor 120 in operation, and reduce vibration, etc.; the plurality of rib plates 1113 further improve the strength of the supporting structure.

[0046] In one or more embodiments, the motor 120 outputs a rotational speed of no less than 15000 rpm, and / or a torque of no less than 0.8 N·m; the inventors have found that the vibration, noise and service life of the motor caused by the motor 120 with the above rotational speed and / or torque requirements are more prominent, and accordingly the first supporting shell 1111 of the embodiment has a particularly significant effect of reducing vibration, noise, and prolonging service life.

[0047] The output gear 1150 has first side tooth profile 1151 and second side tooth profile 1152 on both sides of the gear teeth, and the output gear 1150 carries the first side tooth profile 1151 and the second side tooth profile 1152 respectively when the output gear 1150 rotates in different directions; and the inventors have found that the first side tooth profile 1151 and the second side tooth profile 1152 are respectively in a first working condition of relatively large load and a second working condition of relatively small load.

[0048] As Figure 5As shown in the drawings, in one or more embodiments, the first side tooth profile 1151 is designed with a pressure angle a1 in the range of 17.5° to 18.5°, for example, the pressure angle a1 is 18°; compared with the design of the output gear of the transmission device in the comparative scheme, which adopts a pressure angle of 20°, the design of the pressure angle a1 of the first side tooth profile 1151 can improve the transmission efficiency of the output gear 1150, produce smaller vibration and noise, and smaller wear, etc.; and the design of the pressure angle a1 of the first side tooth profile 1151 is suitable for the first working condition, especially for increasing the included angle between the backrest 30 and the cushion 20, that is, the use condition of lifting the backrest 30 against gravity, under which the first side tooth profile 1151 is loaded, not only can improve the transmission efficiency, reduce vibration, noise, and wear, etc., but also can effectively ensure the strength of the output gear 1150, making the transmission effect stable and reliable.

[0049] As shown in the drawings, Figure 5 As shown in the drawings, in one or more embodiments, the second side tooth profile 1152 of the output gear 1150 is designed with a pressure angle a2 in the range of 14.5° to 15.5°, for example, the pressure angle a2 is 15°; compared with the design of the output gear of the transmission device in the comparative scheme, which adopts a pressure angle of 20°, the design of the pressure angle a2 of the second side tooth profile 1152 can improve the transmission efficiency of the output gear 1150, and produce smaller vibration and noise, and smaller wear, etc. during work; and the design of the pressure angle a2 of the second side tooth profile 1152 is suitable for the second working condition, especially for reducing the included angle between the backrest 30 and the cushion 20, that is, the use condition of falling the backrest 30, under which the load of the output gear 1150 is relatively small, and the second side tooth profile 1152 is loaded, which can improve the transmission efficiency to the greatest extent, improve the effects of vibration reduction, noise reduction, and wear reduction, etc. on the basis of ensuring the strength of the output gear 1150.

[0050] Optionally, the first side tooth profile 1151 of the output gear 1150 is designed with a pressure angle a1 in the range of 17.5° to 18.5°, and the second side tooth profile 1152 of the output gear 1150 is designed with a pressure angle in the range of 14.5° to 15.5°, that is, the output gear 1150 is a gear with asymmetric tooth profiles on both sides.

[0051] As shown in the drawings, Figure 6As shown in the drawings, in one or more embodiments, the transmission 110 further comprises a transmission shaft 116; the transmission shaft 116 extends in the axial direction of the input gear 114, and the transmission shaft 116 is integrally formed with the input gear 114, the worm gear 113 is connected to the transmission shaft 116, and is driven by the transmission shaft 116, so that the worm gear 113 and the input gear 114 rotate synchronously; the integrated design of the input gear 114 and the transmission shaft 116 can reduce assembly procedures, improve structural precision, and reduce vibration, noise, etc.

[0052] As shown in the drawings, Figure 6 In one or more embodiments, a key 117 is provided between the worm gear 113 and the transmission shaft 116 to achieve transmission, which makes assembly simple and fast.

[0053] In one or more embodiments, the worm gear 113 is plastic, which is conducive to noise reduction, weight reduction, and cost savings, etc.; the input gear 114 is metal, which is conducive to improving the strength of the gear; in this case, the design of the transmission shaft 116 and the key 117 enables the worm gear 113 and the input gear 114 to be connected and rotate synchronously without the need to connect the worm gear 113 and the transmission shaft 116 through a plastic molding process, etc., which is conducive to reducing production costs, such as reducing mold costs.

[0054] Specifically, the key 117 can also be multiple, for example, 3, so that the load is evenly distributed and the carrying capacity is improved.

[0055] As shown in the drawings, Figure 6 In one or more embodiments, the transmission 110 further comprises an annular gasket 118; the annular gasket 118 is located between the box 1110 and the input gear 114, for example, the annular gasket 118 is attached to the box 1110 on one side in the axial direction, and is attached to the input gear 114 or other components, such as the transmission shaft 116, on the other side, so that the input gear 114 is axially compressed; this design can eliminate the axial gap between the input gear 114 and the box 1110, etc., which is conducive to reducing vibration and noise during operation, etc.

[0056] The application also provides a motor 120 assembly 10, comprising a transmission device 110 and a motor 120, the transmission device 110 is arranged to transmit power of the motor 120; the motor 120 comprises a motor shell 121, functional components of the motor 120 are fixedly supported by the motor shell 121; the transmission device 110 comprises a box body 1110, transmission components of the transmission device 110 are installed inside the box body 1110; the box body 1110 is provided with a first supporting shell 1111 in the shape of a truncated cone; the motor shell 121 is connected to the first supporting shell 1111, so that the motor 120 is fixedly supported by the box body 1110.

[0057] The application also provides a transmission device 110, comprising a box body 1110, transmission components of the transmission device 110 are installed inside the box body 1110; the box body 1110 is provided with a first supporting shell 1111 in the shape of a truncated cone, the first supporting shell 1111 is used to be connected with a motor shell 121; functional components of a motor 120 are fixedly supported by the motor shell 121; the motor shell 121 is connected to the first supporting shell 1111, so that the motor 120 is fixedly supported by the box body 1110.

[0058] In summary, the further technical effects of the application include at least one of the following:

[0059] Compared with the cylindrical motor supporting structure in the comparative scheme, the first supporting shell in the shape of a truncated cone can reduce vibration and noise, and prolong the service life of the motor; specifically, on the one hand, compared with the cylindrical structure, the truncated cone structure has better stability, better anti-vibration, anti-impact and anti-deformation ability, which is beneficial to improve the strength and rigidity of the motor assembly and the motor supporting structure, so as to reduce vibration and noise, and bear greater impact load; on the other hand, compared with the cylindrical motor supporting structure, the first supporting shell in the shape of a truncated cone can also provide a larger heat dissipation area and improve the heat dissipation efficiency, thereby further improving the structural reliability and prolonging the service life of the motor, etc.; in addition, the structural optimization of the first supporting shell makes the material usage less and the weight lighter.

[0060] Although the application is disclosed with the preferred embodiments as above, it is not intended to limit the application, and any person skilled in the art can make possible changes and modifications without departing from the spirit and scope of the application. Therefore, any modification, equivalent change and modification made to the above embodiments according to the technical essence of the application, without departing from the technical solutions of the application, all fall within the protection scope defined by the claims of the application.

Claims

1. A seat (1) characterized in that, The utility model relates to a chair, which comprises: a seat cushion (20); a backrest (30) rotatably connected to the seat cushion (20); the backrest (30) is driven by a motor assembly (10) to adjust the included angle between the backrest (30) and the seat cushion (20); the motor assembly (10) comprises a transmission device (110) and a motor (120); the transmission device (110) is arranged to transmit the power output by the motor (120); the transmission device (110) comprises a box body (1110); the transmission components of the transmission device (110) are installed inside the box body (1110); the motor (120) comprises a motor shell (121); the functional components of the motor (120) are supported and fixed by the motor shell (121); the box body (1110) is provided with a first supporting shell (1111) in the shape of a truncated cone; the motor shell (121) is connected to the first supporting shell (1111), so that the motor (120) is supported and fixed by the box body (1110).

2. The seat (1) according to claim 1, characterized in that The transmission components of the transmission device (110) comprise: a worm (112) coaxially connected to the output shaft of the motor (120) and capable of being driven synchronously by the rotation of the output shaft of the motor (120); a worm wheel (113) engaged with the worm (112); an input gear (114) coaxially connected to the worm wheel (113) and capable of rotating synchronously with the worm wheel (113); an output gear (1150) receiving the rotation output by the input gear (114) and outputting the rotation as the output of the transmission device (110).

3. The seat (1) according to claim 2, characterized in that The first side tooth profile (1151) of the output gear (1150) is arranged to have a pressure angle in the range of 17.5° to 18.5°.

4. The seat (1) according to claim 2, characterized in that The second side tooth profile (1152) of the output gear (1150) is arranged to have a pressure angle in the range of 14.5° to 15.5°.

5. A seat (1) according to claim 2, characterized in that The transmission device (110) further comprises a transmission shaft (116); the transmission shaft (116) extends in the axial direction of the input gear (114), and the transmission shaft (116) is integrally formed with the input gear (114); the worm wheel (113) is connected to the transmission shaft (116).

6. A seat (1) according to claim 5, characterized in that A key connection is provided between the worm wheel (113) and the transmission shaft (116).

7. A seat (1) according to claim 2, characterized in that The transmission device (110) further comprises an annular gasket (118); the annular gasket (118) is attached to the input gear (114) on one side in the axial direction and attached to the box body (1110) on the other side, so that the input gear (114) is axially compressed.

8. A seat (1) according to claim 1, characterized in that The rotation speed output by the motor (120) is not less than 15000 rpm, and / or the torque output by the motor (120) is not less than 0.8 N·m.

9. An electric machine assembly (10) characterized by, The utility model relates to a chair, which comprises: a seat cushion (20); a backrest (30) rotatably connected to the seat cushion (20); the backrest (30) is driven by a motor assembly (10) to adjust the included angle between the backrest (30) and the seat cushion (20); the motor assembly (10) comprises a transmission device (110) and a motor (120); the transmission device (110) is arranged to transmit the power output by the motor (120); The transmission (110) comprises a box (1110), transmission components of the transmission (110) are mounted inside the box (1110); The motor (120) comprises a motor shell (121), functional components of the motor (120) are supported and fixed by the motor shell (121); The box (1110) is provided with a first supporting shell (1111) in the shape of a truncated cone; the motor shell (121) is connected to the first supporting shell (1111), so that the motor (120) is supported and fixed by the box (1110).

10. A transmission (110) characterized by The transmission (110) comprises a box (1110), transmission components of the transmission (110) are mounted inside the box (1110); The box (1110) is provided with a first supporting shell (1111) in the shape of a truncated cone; the first supporting shell (1111) is used to provide an assembly position of a motor shell (121); functional components of a motor (120) are supported and fixed by the motor shell (121); the motor shell (121) is connected to the first supporting shell (1111), so that the motor (120) is supported and fixed by the box (1110).

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