Turnover driving device with double-layer structure

Abstract

The utility model discloses a double-layer structure turnover driving device which comprises a first layer structure and a second layer structure which are arranged in an overlapped mode, a fixed gear is fixedly installed at the end of the first layer structure, a revolution gear is rotatably installed at the end of the second layer structure, and the revolution gear can keep meshing transmission with the fixed gear. A driving assembly is arranged on the first layer structure and used for driving the revolution gear to rotate in the circumferential direction of the fixed gear so that the second layer structure can turn over front and back relative to the first layer structure. The utility model has the beneficial effects that the driving assembly drives the revolution gear to rotate around the circumferential direction of the fixed gear, and can drive the second layer structure to overturn backwards to a horizontal state relative to the first layer structure.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile seats, in particular to a double-layer structure turnover drive device. Background Art

[0002] With the rapid development of the economy, cars are not just a means of transportation; they also provide a place for users to rest and recline. In traditional car seats, reclining is typically achieved by folding the seat backrest backward. However, the combined length of a single seat cushion and backrest is too short, providing insufficient support and a lack of comfort. Alternatively, multiple seats can be joined together to form a bed to increase the support area, but this approach is difficult to operate.

[0003] To address these needs, companies are actively developing technologies that can transform entire chairs into beds. The current main concept involves creating a double-layered backrest or seat cushion that can be flipped and unfolded to expand the seating area and ensure the feasibility of converting the chair into a bed. However, this research and development process still lacks a drive mechanism to enable the flipping and unfolding of the double-layered backrest or seat cushion. Utility Model Content

[0004] In view of this, the utility model provides a double-layer structure turning drive device, which can drive the double-layer structure to turn and flatten.

[0005] To achieve the above purpose, the technical solution of this utility model is as follows:

[0006] A double-layer structure flipping drive device, the key of which is that it includes a first layer structure and a second layer structure arranged in an overlapping manner, a fixed gear is fixedly installed on the end of the first layer structure, and a revolving gear is rotatably installed on the end of the second layer structure, and the revolving gear can maintain meshing transmission with the fixed gear. A driving assembly is provided on the first layer structure, and the driving assembly is used to drive the revolving gear to rotate around the circumference of the fixed gear so that the second layer structure can flip back and forth relative to the first layer structure.

[0007] With the above structure, the driving assembly drives the revolving gear to rotate circumferentially around the fixed gear, which can drive the second layer structure to flip backward to a horizontal state relative to the first layer structure.

[0008] Preferably, the driving assembly includes a rotating arm rotatably arranged on the side of the first layer structure and a second driver that drives the rotating arm to rotate, the rotation center of the rotating arm coincides with the center line of the fixed gear, and the rotating arm is rotatably sleeved with the revolving gear.

[0009] Preferably, the rotating arm is arranged on the outside of the fixed gear, and the second driver has an output shaft, which passes through the fixed gear from the inside to the outside and is fixedly connected to the rotating arm on the outside.

[0010] Preferably: a retaining frame is provided between the fixed gear and the revolving gear, and the retaining frame is used to enable the revolving gear and the fixed gear to maintain a continuous meshing state; the driving assembly includes a transmission gear rotatably installed at the rear end of the first layer structure and a first driver that drives the transmission gear to rotate, the transmission gear and the fixed gear are coaxially arranged, and the transmission gear is meshed with the revolving gear.

[0011] Preferably, the transmission ratio among the fixed gear, the revolving gear and the transmission gear is 1:1:1.

[0012] Preferably, the revolving gear is a duplex gear having two annular tooth portions, and the fixed gear and the transmission gear are respectively engaged with the two annular tooth portions.

[0013] Preferably, the fixed gears and the corresponding revolving gears, transmission gears and retaining frames are each provided with two groups, and the two groups of fixed gears are respectively fixed on both sides of the rear end of the first layer structure.

[0014] Preferably, a synchronization rod is connected between the two groups of transmission gears, and the first driver drives the synchronization rod to rotate, thereby driving the two groups of transmission gears to rotate synchronously.

[0015] Preferably, both ends of the retaining frame are rotatably connected to the axis positions of the fixed gear and the revolving gear through two pins respectively.

[0016] Preferably, the first layer structure and the second layer structure constitute two layers of seat cushions arranged overlapping each other;

[0017] Alternatively, the first layer structure and the second layer structure constitute two layers of backrest arranged to overlap each other.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. With the dual-layer structure flip drive device provided by this utility model, the drive assembly drives the revolving gear to rotate circumferentially around the fixed gear, driving the second layer structure to flip backward relative to the first layer structure to a horizontal position. Using a gear transmission, the meshing self-locking effect between the gears after shutdown can keep the second layer structure stably horizontal, ensuring the reliability and stability of the movement between the first and second layers.

[0020] 2. The double-layer structure flipping drive device provided by the present invention is applied to the double-layer structure seat cushion of a car seat. In the sitting state, the upper seat cushion and the lower seat cushion are arranged overlappingly, and the revolving gear is located on the upper side of the fixed gear. The driving assembly drives the revolving gear to revolve around the circumference of the fixed gear. Under the holding action of the retaining frame, it can drive the rear end of the upper seat cushion to rotate backward around the rear end of the lower seat cushion, thereby driving the upper seat cushion to flip backward to a horizontal state relative to the lower seat cushion, thereby achieving the purpose of expanding the support area and ensuring the feasibility of the seat being transformed into a bed.

[0021] 3. The double-layer structure flip drive device provided by the utility model has the advantages of high transmission efficiency and high motion precision, which improves the stability of the rotation of the second-layer structure; secondly, during transmission, the vibration generated between the gears is small, which can reduce the transmission noise and improve the user experience. In addition, each gear is small in size, light in weight, and has a strong bearing capacity, which is particularly suitable for use in cars with limited space. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the double-layer structure flip drive device when overlapping;

[0023] Figure 2 This is a right side view of the double-layer structure flip drive device when overlapping (the retaining frame 3 is hidden);

[0024] Figure 3 It is a schematic diagram of the structure of the double-layer structure flip drive device when it is unfolded;

[0025] Figure 4 This is a rear view of the double-layer structure flip drive device when overlapping;

[0026] Figure 5 This is a schematic diagram of the structure of the double-layer structure flip drive device when applied to a seat cushion (sitting position);

[0027] Figure 6 This is another structural diagram of the double-layer structure flip drive device when applied to a seat cushion (in the unfolded state);

[0028] Figure 7 This is a schematic diagram of the structure of the double-layer structure flip drive device when applied to the backrest (sitting state);

[0029] Figure 8 Another structural diagram of the double-layer structure flip drive device when applied to a backrest (in the unfolded state);

[0030] Figure 9 This is a structural schematic diagram of another embodiment of a double-layer structure tilting drive device applied to a seat cushion. DETAILED DESCRIPTION

[0031] The present invention will be further described below with reference to the embodiments and accompanying drawings.

[0032] This embodiment takes the application of the double-layer structure flip drive device on a double-layer structure seat cushion as an example for detailed description.

[0033] like Figure 2 and 5 As shown, a double-layer structure flip drive device includes a first layer structure 1 and a second layer structure 2 arranged in an overlapping manner. The first layer structure 1 and the second layer structure 2 constitute two layers of seat cushions arranged in an overlapping manner, that is, the first layer structure 1 and the second layer structure 2 correspond to the lower layer seat cushion and the upper layer seat cushion respectively. The first layer structure 1 is assembled inside the car through the mounting base 6. A fixed gear 41 is fixedly installed at the rear end of the first layer structure 1, and a revolving gear 42 is rotatably installed at the rear end of the second layer structure 2. The revolving gear 42 can maintain meshing transmission with the fixed gear 41. Figure 6 As shown, the first layer structure 1 is provided with a driving assembly 4, which can drive the revolving gear 42 to rotate around the circumference of the fixed gear 41, so that the upper seat cushion can be flipped backward to a horizontal state relative to the lower seat cushion.

[0034] Based on the above structural design, when the seat is in the sitting position, the upper and lower seat cushions overlap, with the revolving gear 42 located above the fixed gear 41. The drive assembly 4 drives the revolving gear 42 to rotate circumferentially around the fixed gear 41, which drives the rear end of the upper seat cushion to rotate backward around the rear end of the lower seat cushion, thereby causing the upper seat cushion to flip backward relative to the lower seat cushion to a horizontal position, thereby expanding the support area and ensuring the feasibility of the seat's transformation into a bed. Furthermore, the use of a gear drive ensures that the upper seat cushion remains stably horizontal after shutdown, thanks to the self-locking effect of the meshing between the gears.

[0035] Furthermore, Figure 1 and 4As shown, a retainer 3 is disposed between the fixed gear 41 and the revolving gear 42. The two ends of the retainer 3 are rotatably sleeved onto the axis of the fixed gear 41 and the revolving gear 42, respectively, to maintain a continuous meshing state between the revolving gear 42 and the fixed gear 41. The drive assembly 4 includes a transmission gear 43 rotatably mounted at the rear end of the first structure 1 and a first driver 44 that drives the transmission gear 43. The transmission gear 43 is coaxially arranged with the fixed gear 41 and meshes with the revolving gear 42. The first driver 44 rotates the transmission gear 43. Since the fixed gear 41 is fixedly mounted at the rear end of the lower seat cushion and the revolving gear 42 is rotatably mounted at the rear end of the upper seat cushion, the revolving gear 42 meshes with both the fixed gear 41 and the transmission gear 43. Therefore, the rotation of the transmission gear 43 drives the revolving gear 42 to rotate on its own while simultaneously revolving around the axis of the fixed gear 41, thereby causing the upper seat cushion to tilt back relative to the lower seat cushion. Using such a structural transmission has the advantages of high transmission efficiency and high movement precision, which improves the stability of the upper seat cushion rotation; secondly, during transmission, the vibration generated between the gears is small, which can reduce transmission noise and improve the user experience. In addition, each gear is small in size, light in weight, and has a strong load-bearing capacity, which is particularly suitable for use in cars with limited space.

[0036] In this embodiment, the transmission ratio between the fixed gear 41, the revolving gear 42, and the transmission gear 43 is 1:1:1. This design minimizes the structure of the fixed gear 41, the revolving gear 42, and the transmission gear 43. In actual use, after the upper and lower seat cushions are covered, the size of the gears can be perfectly integrated with the thickness of the upper and lower seat cushions, improving the overall aesthetics of the seat.

[0037] In addition, the revolving gear 42 can also be a double gear, which has two annular teeth. The fixed gear 41 and the transmission gear 43 are respectively engaged with the two annular teeth. The rotation of the transmission gear 43 can also drive the revolving gear 42 to rotate and revolve around the fixed gear 41.

[0038] Depend on Figure 4 As can be seen, in this embodiment, there are two sets of fixed gears 41, revolving gears 42, transmission gears 43, and retaining frame 3, each corresponding to a corresponding set. The two sets of fixed gears 41 are fixedly mounted on either side of the rear end of the first structure 1, the two sets of revolving gears 42 are rotatably mounted on either side of the rear end of the upper seat cushion 2, and the two sets of transmission gears 43 are rotatably mounted on either side of the rear end of the first structure 1. In the transmission mechanism on the same side, the transmission gear 43 is coaxially arranged with the fixed gear 41, and the transmission gear 43 is located inside the fixed gear 41. The retaining frame 3 is located at the outer end, and both ends of the retaining frame 3 are rotatably connected to the axis of the fixed gear 41 and the revolving gear 42, respectively, via a pin b.

[0039] Please refer to Figure 1 and 3 A synchronization rod 45 is connected between the two transmission gears 43. The first driver 44 drives the synchronization rod 45 to rotate, which can drive the two transmission gears 43 to rotate synchronously, thereby driving the two sets of revolving gears 42 to rotate while revolving around the corresponding fixed gears 41, thereby driving the upper seat cushion 2 to flip backward to a horizontal state.

[0040] Re-attend Figure 1 In this embodiment, the first driver 44 includes a motor 441 and an output component 442 connected to the output shaft of the motor 441, wherein the output component 442 is fixedly sleeved on the synchronization rod 45, and the base of the motor 441 is fixedly connected to the first layer structure 1 through the adapter frame a.

[0041] The specific implementation of the driving assembly 4 driving the revolving gear 42 to rotate circumferentially around the fixed gear 41 can also be referred to Figure 9 As shown, the drive assembly 4 includes a rotating arm 46 rotatably mounted on the side of the first structure 1 and a second driver 47 that drives the rotating arm 46. The rotation center of the rotating arm 46 coincides with the centerline of the fixed gear 41, and the rotating arm 46 is rotatably engaged with the revolving gear 42. The second driver 47 drives the rotating arm 46 to rotate backward about its rotation center with the first structure 1, thereby driving the revolving gear 42 to rotate circumferentially around the fixed gear 41, thereby causing the upper seat cushion to flip backward relative to the lower seat cushion to a horizontal position.

[0042] For details, please refer to Figure 9 , the rotating arm 46 is arranged on the outside of the fixed gear 41, and the second driver 47 has an output shaft 471. The output shaft 471 passes through the fixed gear 41 from the inside to the outside and is fixedly connected to the rotating arm 46 on the outside. The second driver 47 drives the output shaft 471 to rotate, which can drive the rotating arm 46 to rotate. In this embodiment, the number of fixed gears 41, revolving gears 42 and rotating arms 46 is provided in two groups, and they correspond one to one. The two groups of fixed gears 41 are respectively located on both sides of the rear end of the first layer structure 1, and the two groups of revolving gears 42 are respectively located on both sides of the rear end of the second layer structure 2. The two ends of the output shaft 471 pass through the fixed gears 41 on both sides and are fixedly connected to the two groups of rotating arms 46. The second driver 47 drives the output shaft 471 to rotate, which can drive the rotating arms 46 on both sides of the first layer structure 1 to rotate synchronously.

[0043] In addition to the above embodiments, Figure 7 and 8As shown, the drive device can be applied to the backrest of the double-layer structure of the automobile seat. The first layer structure 1 and the second layer structure 2 correspond to the front backrest and the rear backrest respectively. The fixed gear 41 is fixedly installed at the lower end of the front backrest, and the revolving gear 42 is installed at the lower end of the rear backrest. After the backrest is tilted forward as a whole, the drive component 4 can drive the rear backrest to flip backward to a horizontal state relative to the front backrest, so as to achieve the purpose of expanding the support area.

[0044] 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. Such changes fall within the scope of protection of the present invention.

Claims

1. A double-layer structure flip drive device, characterized in that: The invention comprises a first layer structure (1) and a second layer structure (2) which are arranged in an overlapping manner. A fixed gear (41) is fixedly mounted on the end of the first layer structure (1). A revolving gear (42) is rotatably mounted on the end of the second layer structure (2). The revolving gear (42) can maintain meshing transmission with the fixed gear (41). A driving assembly (4) is provided on the first layer structure (1). The driving assembly (4) is used to drive the revolving gear (42) to rotate around the circumference of the fixed gear (41) so that the second layer structure (2) can be flipped forward and backward relative to the first layer structure (1).

2. The double-layer structure turning drive device according to claim 1, characterized in that: The driving assembly (4) includes a rotating arm (46) rotatably arranged on the side of the first layer structure (1) and a second driver (47) driving the rotating arm (46) to rotate, the rotation center of the rotating arm (46) coincides with the center line of the fixed gear (41), and the rotating arm (46) is rotatably connected to the revolving gear (42).

3. The double-layer structure turning drive device according to claim 2, characterized in that: The rotating arm (46) is arranged outside the fixed gear (41), and the second driver (47) has an output shaft (471). The output shaft (471) passes through the fixed gear (41) from the inside to the outside and is fixedly connected to the rotating arm (46) on the outside.

4. The double-layer structure turning drive device according to claim 1, characterized in that: A retaining frame (3) is provided between the fixed gear (41) and the revolving gear (42), and the retaining frame (3) is used to keep the revolving gear (42) and the fixed gear (41) in a continuously meshed state; the driving assembly (4) comprises a transmission gear (43) rotatably mounted on the rear end of the first layer structure (1) and a first driver (44) driving the transmission gear (43) to rotate, the transmission gear (43) and the fixed gear (41) being coaxially arranged, and the transmission gear (43) meshing with the revolving gear (42).

5. The double-layer structure turning drive device according to claim 4, characterized in that: The transmission ratio among the fixed gear (41), the revolving gear (42) and the transmission gear (43) is 1:1:

1.

6. The double-layer structure turning drive device according to claim 4, characterized in that: The revolving gear (42) is a double gear having two annular tooth portions, and the fixed gear (41) and the transmission gear (43) are respectively engaged with the two annular tooth portions.

7. The double-layer structure turning drive device according to claim 4, characterized in that: The fixed gear (41) and the corresponding revolving gear (42), transmission gear (43) and retaining frame (3) are each provided with two groups, and the two groups of fixed gears (41) are respectively fixed on both sides of the rear end of the first layer structure (1).

8. The double-layer structure turning drive device according to claim 7, characterized in that: A synchronization rod (45) is connected between the two groups of transmission gears (43), and the first driver (44) drives the synchronization rod (45) to rotate, thereby driving the two groups of transmission gears (43) to rotate synchronously.

9. The double-layer structure turning drive device according to claim 4, characterized in that: The two ends of the retaining frame (3) are rotatably connected to the axis positions of the fixed gear (41) and the revolving gear (42) through two pin shafts (b).

10. The double-layer structure turning drive device according to claim 1, characterized in that: The first layer structure (1) and the second layer structure (2) constitute two layers of seat cushions that are arranged overlapping each other; Alternatively, the first layer structure (1) and the second layer structure (2) constitute two layers of backrest arranged overlapping each other.

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