Coaxial dual-output driving mechanism and automobile seat pedal

Abstract

The driving mechanism comprises a motor body, the two axial ends of the motor body are connected with transmission shafts in a speed reduction mode through planetary gear trains, the two ends of a rotor of the motor body are provided with output shafts, and the tail ends of the output shafts are provided with angle adjusters; the motor body, the planetary gear train at two ends of the motor body and the transmission shaft are arranged in the same axial direction. The automobile seat pedal comprises a seat body and a pedal plate, the seat body is provided with a seat supporting assembly, a leg support assembly is installed on the front portion of the seat supporting assembly, and the driving mechanism is arranged at the front end of the leg support assembly. A first connecting rod and a second connecting rod are symmetrically arranged at the two ends of the pedal, one end of the first connecting rod is hinged to the pedal, and the other end of the first connecting rod is connected with the angle adjuster. The driving mechanism has the advantages of being compact in structure, large in reduction ratio, small in occupied space of the seat pedal and convenient to adjust.

Description

Technical Field

[0001] The invention relates to the technical field of automobile seats, and in particular to a coaxial dual-output drive mechanism and an automobile seat footrest. Background Art

[0002] In the structure of automobile seats, a large number of rotating assembly structures are involved, such as between the backrest and the seat frame, between the leg rest and the seat frame, between the headrest and the backrest, etc. In the prior art, these rotating installation structures are mainly controlled by electric direct drive angle adjusters, arc gear plate transmission or four-bar transmission. These transmission mechanisms cannot provide a large reduction ratio, resulting in large motor drive loads, poor durability, low transmission accuracy and other defects. Automobile seats often have high requirements for integration, and the available layout space is limited, so adding additional reducers or replacing high-power drivers is not the best optimization direction.

[0003] Therefore, it is urgent to develop a rotary drive mechanism with high transmission accuracy and good compactness. Summary of the invention

[0004] In view of this, the present invention provides a coaxial dual-output drive mechanism to meet the technical requirements of the background technology. To achieve the above purpose, the technical solution of the present invention is as follows:

[0005] A coaxial dual-output drive mechanism comprises a motor body, wherein the motor body has two axial ends each connected to a transmission shaft via a reduction assembly, the motor body comprises a stator and a rotor rotatably arranged in the stator, output shafts are arranged at both ends of the rotor, and both reduction assemblies are planetary gear trains, which are dynamically connected between the corresponding output shafts and the transmission shaft in a reduction transmission manner, and the motor body and the planetary gear trains and the transmission shaft at both ends thereof are arranged in the same axial direction.

[0006] With the above structure, the drive mechanism has two transmission shafts, which are connected to the two ends of the motor body through a planetary gear train, so that the drive mechanism is cylindrical as a whole and has a compact structure. The output and transmission of the rotating drive part are realized through a planetary gear train, with a large reduction ratio, a small load driven by the motor, and a more stable transmission.

[0007] Preferably, the planetary gear train includes a first sun gear, a first planetary gear, a first outer gear ring and a first planet carrier, wherein the first sun gear is coaxially fixedly connected to the output shaft, the first outer gear ring is fixedly installed relative to the stator of the motor body, and the first planet carrier is directly or indirectly connected to the transmission shaft. The above structure is compact, has a good deceleration effect, and can ensure that the output shaft is coaxial with the transmission shaft.

[0008] Preferably, the planetary gear train further comprises a second sun gear, a second planetary gear, a second outer gear ring and a second planet carrier, wherein the second sun gear is fixedly connected to the first planet carrier, the second outer gear ring is fixedly installed relative to the stator of the motor body, and the second planet carrier is connected to the transmission shaft. With the above structure, the planetary gear trains can be superimposed, and the deceleration effect is multiplied.

[0009] As a preferred embodiment, the motor further comprises a cylindrical housing, wherein the stator of the motor body, the first outer gear ring and the second outer gear ring of the planetary gear train are fixed on the inner wall of the housing. The above structure is adopted to protect the internal structure of the housing and reduce the volume as much as possible.

[0010] As a preference, the transmission shaft is provided with an angle adjuster at one end away from the reduction assembly. With the above structure, power is output.

[0011] The present invention also provides a car seat footrest, which aims to solve the problem that the existing car seat footrest occupies a large space and compresses the leg activity space.

[0012] To achieve the above purpose, the technical solution of the present invention is as follows:

[0013] A car seat footrest, comprising a seat body, the seat body having a seat support assembly, a leg support assembly installed at the front of the seat support assembly, a coaxial dual-output drive mechanism for the car seat arranged at the front end of the leg support assembly, and the coaxial dual-output drive mechanism is arranged along the width direction of the leg support assembly;

[0014] It also includes a foot pedal, with first connecting rods symmetrically arranged at both ends of the foot pedal, one end of the first connecting rod is hinged to the side of the foot pedal, and the other end is connected to the angle adjuster, and second connecting rods are symmetrically arranged at both ends of the foot pedal, one end of the second connecting rod is hinged to the side of the foot pedal, and the other end is connected to the side of the leg rest assembly.

[0015] With the above structure, the foot pedal is driven by a coaxial dual-output drive mechanism, the driving structure occupies a small space, and the leg activity space can be increased.

[0016] As a preferred embodiment, a protective cover is provided at the front of the leg rest assembly, and the protective cover has an arc-shaped installation cavity extending along the width direction of the leg rest assembly, and the motor body, the planetary gear train and the transmission shaft are all arranged in the arc-shaped installation cavity. The above structure is compact and easy to install.

[0017] Preferably, the leg rest assembly includes a base that is flip-mounted at the front end of the seat support assembly, a support body is mounted on the base so as to slide forward and backward through a linkage assembly, a flip drive mechanism is provided between the seat support assembly and the leg rest assembly, the flip drive mechanism is used to drive the base to flip forward relative to the seat support assembly and unfold, and during the process of the base flipping forward and unfolding, the linkage assembly can force the support body to slide forward relative to the base. With the above structure, the leg rest assembly can be linked by driving the base to flip, and the adjustment is convenient.

[0018] Preferably, the support body is slidably connected with an expansion part, the leg support assembly is provided with a telescopic driving mechanism for driving the expansion part to slide forward and backward relative to the support body, and the first connecting rod and the second connecting rod are connected to the front side of the expansion part. The above structure is convenient for using the pedal.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The coaxial dual-output drive mechanism has two transmission shafts, which are connected to the two ends of the dual-output motor body through a planetary gear train, making the drive mechanism as a whole cylindrical and compact. When used as a drive device for rotating output of a car seat, it can significantly optimize the structural compactness of the corresponding position of the seat. At the same time, through the planetary gear train reduction transmission, a large reduction ratio can be achieved, the motor drive load is small, and the transmission is more stable.

[0021] 2. In the car seat leg support, the footrest is driven by a coaxial dual-output drive mechanism, which has stable movement and occupies a small space, avoiding compression of the leg activity space inside the car and improving riding comfort.

[0022] 3. In the car seat leg rest, the leg rest and footrest are adjusted layer by layer through the flip drive mechanism, linkage assembly, and telescopic drive mechanism. When not in use, it can be completely folded without affecting normal riding needs. When in use, it can not only ensure that the leg rest has sufficient extension and improve the support comfort of the leg rest, but also can be adjusted quickly and stably. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of a car seat footrest;

[0024] Figure 2 A schematic diagram showing the installation of the drive mechanism on the seat;

[0025] Figure 3 It is a schematic diagram of the structure of the inner side of the footrest of the car seat;

[0026] Figure 4 This is a schematic diagram of the seat footrest in a folded state;

[0027] Figure 5It is a side view of a car seat footrest;

[0028] Figure 6 It is a schematic diagram of the external structure of the coaxial dual-output drive mechanism;

[0029] Figure 7 It is a schematic diagram of the internal structure of the coaxial dual-output drive mechanism;

[0030] Figure 8 A schematic diagram showing the structure of the linkage component 13;

[0031] Fig. 9 It is a schematic diagram showing the telescopic driving mechanism 14. DETAILED DESCRIPTION

[0032] The present invention is further described below in conjunction with embodiments and drawings.

[0033] like Figure 1 As shown, a car seat footrest includes a seat body, the seat body has a seat support assembly 7, a leg support assembly 8 is installed in front of the seat support assembly 7, a protective cover 12 is provided in front of the leg support assembly 8, the protective cover 12 has an arc-shaped installation cavity 12a extending along the width direction of the leg support assembly 8, and a coaxial dual-output drive mechanism and a car seat footrest are installed in the installation cavity 12a; Figure 2 As shown, it also includes a foot pedal 10, and the first connecting rod 9 is symmetrically arranged at both ends of the foot pedal 10. One end of the first connecting rod 9 is hinged to the side of the foot pedal 10, and the other end is connected to the output end of the driving mechanism. The second connecting rod 11 is also symmetrically arranged at both ends of the foot pedal 10. One end of the second connecting rod 11 is hinged to the side of the foot pedal 10, and the other end is connected to the side of the leg rest assembly 8. The first connecting rod 9, the second connecting rod 11, the foot pedal 10 and the leg rest assembly 8 constitute a four-bar mechanism.

[0034] like Figure 6 and Figure 7 As shown, the coaxial dual-output drive mechanism for a car seat includes a motor body 1, and the two axial ends of the motor body 1 are connected to a transmission shaft 2 through a planetary gear train 3. The motor body 1 includes a stator 1b and a rotor 1a rotatably arranged in the stator 1b, and output shafts 4 are arranged at both ends of the rotor 1a. The motor body 1 and the planetary gear trains 3 at both ends and the transmission shaft 2 are arranged in the same axial direction. An angle adjuster 6 is provided at one end of the transmission shaft 2 away from the reduction assembly, and the planetary gear train 3 is dynamically connected between the corresponding output shaft 4 and the transmission shaft 2 in a reduction transmission manner.

[0035] like Figure 7As shown, in this embodiment, the planetary gear train 3 is a double planetary gear set, and its structure includes a first sun gear 3a1, a first planetary gear 3a2, a first outer gear ring 3a3 and a first planet carrier 3a4; and also includes a second sun gear 3b1, a second planetary gear 3b2, a second outer gear ring 3b3 and a second planet carrier 3b4. Among them, the first sun gear 3a1 is coaxially fixed to the output shaft 4, the first planet carrier 3a4 is connected to the second sun gear 3b1, and the second planet carrier 3b4 is connected to the transmission shaft 2. The driving mechanism also includes a housing 5 in a cylindrical structure, and the stator 1b, the first outer gear ring 3a3 of the planetary gear train 3, and the second outer gear ring 3b3 are all fixed on the inner wall of the housing 5. The driving mechanism can achieve a larger reduction ratio through the planetary gear train 3, the load of the motor drive is small, and the transmission is more stable. And the overall cylindrical body has a compact structure, which can meet the situation where the layout space of the car seat is limited.

[0036] like Figure 3 and Figure 5 As shown, the leg rest assembly 8 includes a base 8a which is flip-mounted at the front end of the seat support assembly 7, on which a support body 8b is slidably mounted forward and backward via a linkage assembly 13, and a flip driving mechanism 15 is provided under the seat support assembly 7, for driving the base 8a to flip forward and unfold relative to the seat support assembly 7.

[0037] like Figure 8 As shown, the linkage assembly 13 includes a first rod 13a, a second rod 13b, a third rod 13c, a fourth rod 13d and a synchronous flip component 13e. The rear end of the base 8a is hinged on the seat support assembly 7, and the synchronous flip component 13e is located above the base 8a, facing the front end of the base 8a, and is also hinged on the seat support assembly 7. The rear end of the first rod 13a is hinged on the rear end of the base 8a, and the front end is hinged with the rear end of the second rod 13b. The front end of the second rod 13b is hinged to the middle of the third rod 13c, and the front end of the third rod 13c is hinged to the support body 8b. The rear end of the fourth rod 13d is hinged to the middle of the first rod 13a, and the front end is hinged with the rear end of the third rod 13c. The middle of the fourth rod 13d is also hinged with the synchronous flip component 13e. In the process of the base 8a flipping forward and unfolding, the first rod 13a is driven to rotate, and the remaining rods are linked, thereby forcing the support body 8b to slide forward relative to the base 8a.

[0038] like Fig. 9As shown, the front end of the support body 8b is slidably connected with an expansion part 16, and the expansion part 16 is fixed on both sides of the protective cover 12. The leg support assembly 8 is provided with a telescopic driving mechanism 14 that drives the expansion part 16 to slide forward and backward relative to the support body 8b. The telescopic driving mechanism 14 includes a driver 14a, a fifth rod 14b, a sixth rod 14c, a seventh rod 14d and an eighth rod 14e. The driver 14a is fixed on the support body 8b, the rear end of the fifth rod 14b is hinged on the support body 8b, the front end is hinged to the rear end of the sixth rod 14c, the front end of the sixth rod 14c is hinged to the middle of the seventh rod 14d, the front end of the seventh rod 14d is hinged to the protective cover 12, and the rear end is hinged to the front end of the eighth rod 14e, and the rear end of the eighth rod 14e is hinged to the middle of the fifth rod 14b. The driver 14a is connected to the middle of the eighth rod 14e, and drives the eighth rod 14e in the front-to-back direction, so that the expansion part 16 and the protective cover 12 slide forward and backward relative to the support body 8b.

[0039] like Figure 4 As shown, in normal state, the support body 8b and the seat support assembly 7 are perpendicular to each other, and the angle adjuster 6 of the coaxial dual-output drive mechanism controls the foot pedal 10 to avoid the inner side of the support body 8b, meeting normal riding needs and not occupying too much leg activity space. Figure 1 As shown, when the footrest and leg rest are in use, the flip drive mechanism 15 first drives the base 8a to flip forward. At the same time, the linkage assembly 13 causes the support body 8b to slide forward. The driver 14a installed on the support body 8b drives the expansion part 16 to slide forward. Finally, the coaxial dual-output drive mechanism drives the first connecting rod 9 to rotate so that the footrest 10 is unfolded outward. The drive mechanism is columnar as a whole and occupies less space for leg activities.

[0040] Finally, it should be noted that the above description is only a preferred embodiment of the present invention. Under the guidance of the present invention, ordinary technicians in this field can make various similar expressions without violating the purpose and claims of the present invention, and such changes all fall within the scope of protection of the present invention.

Claims

1. A coaxial dual-output drive mechanism, characterized in that: The invention comprises a motor body (1), wherein the motor body (1) is connected to a transmission shaft (2) at both axial ends via a reduction assembly, the motor body (1) comprises a stator (1b) and a rotor (1a) rotatably arranged in the stator (1b), and output shafts (4) are arranged at both ends of the rotor (1a), and both reduction assemblies are planetary gear trains (3) which are dynamically connected between the corresponding output shafts (4) and the transmission shaft (2) in a reduction transmission manner, and the motor body (1) and the planetary gear trains (3) and the transmission shaft (2) at both ends are arranged in the same axial direction.

2. A coaxial dual-output drive mechanism according to claim 1, characterized in that: The planetary gear train (3) comprises a first sun gear (3a1), a first planetary gear (3a2), a first outer gear ring (3a3) and a first planet carrier (3a4), wherein the first sun gear (3a1) is coaxially fixedly connected to the output shaft (4), the first outer gear ring (3a3) is fixedly installed relative to the stator (1b) of the motor body (1), and the first planet carrier (3a4) is directly or indirectly connected to the transmission shaft (2).

3. A coaxial dual-output drive mechanism according to claim 2, characterized in that: The planetary gear train (3) further comprises a second sun gear (3b1), a second planetary gear (3b2), a second outer gear ring (3b3) and a second planet carrier (3b4), wherein the second sun gear (3b1) is fixedly connected to the first planet carrier (3a4), the second outer gear ring (3b3) is fixedly mounted relative to the stator (1b) of the motor body (1), and the second planet carrier (3b4) is connected to the transmission shaft (2).

4. A coaxial dual-output drive mechanism according to claim 3, characterized in that: It also includes a cylindrical housing (5), wherein the stator (1b) of the motor body (1), the first outer gear ring (3a3) and the second outer gear ring (3b3) of the planetary gear train (3) are all fixed on the inner wall of the housing (5).

5. The coaxial dual-output drive mechanism according to claim 1, characterized in that: An angle adjuster (6) is provided at one end of the transmission shaft (2) away from the speed reduction assembly.

6. A car seat footrest, characterized in that: The seat body comprises a seat support assembly (7), a leg support assembly (8) is installed at the front of the seat support assembly (7), a coaxial dual-output drive mechanism for a car seat as claimed in claim 5 is arranged at the front end of the leg support assembly (8), and the coaxial dual-output drive mechanism is arranged along the width direction of the leg support assembly (8); It also includes a foot pedal (10), wherein the first connecting rod (9) is symmetrically arranged at both ends of the foot pedal (10), one end of the first connecting rod (9) is hinged to the side of the foot pedal (10), and the other end is connected to the angle adjuster (6), and the second connecting rod (11) is symmetrically arranged at both ends of the foot pedal (10), one end of the second connecting rod (11) is hinged to the side of the foot pedal (10), and the other end is connected to the side of the leg support assembly (8).

7. The automobile seat footrest according to claim 6, characterized in that: A protective cover (12) is provided at the front of the leg rest assembly (8), and the protective cover (12) has an arc-shaped installation cavity (12a) extending along the width direction of the leg rest assembly (8), and the motor body (1), the planetary gear train (3) and the transmission shaft (2) are all arranged in the arc-shaped installation cavity (12a).

8. The automobile seat footrest according to claim 6, characterized in that: The leg support assembly (8) comprises a base (8a) which is flip-mounted at the front end of the seat support assembly (7); a support body (8b) is mounted on the base (8a) in a manner that allows it to slide forward and backward via a linkage assembly (13); a flip driving mechanism (15) is provided between the seat support assembly (7) and the leg support assembly (8); the flip driving mechanism (15) is used to drive the base (8a) to flip forward relative to the seat support assembly (7) and unfold; during the process of the base (8a) flipping forward and unfolding, the linkage assembly (13) can force the support body (8b) to slide forward relative to the base (8a).

9. The automobile seat footrest according to claim 8, characterized in that: The support body (8b) is slidably connected to an expansion part (16), and the leg support assembly (8) is provided with a telescopic driving mechanism (14) for driving the expansion part (16) to slide forward and backward relative to the support body (8b); the first connecting rod (9) and the second connecting rod (11) are connected to the front end side of the expansion part (16).

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