Frictional locking device for a swivel of a car seat

Abstract

The application discloses a friction locking device for a rotating disc of a car seat, which comprises a base, a movable disc assembly rotatably arranged on the base, a friction brake ring fixed on the base, a friction brake block movably connected to the movable disc assembly, and a driving mechanism for controlling the movement of the friction brake block. The friction brake block is arranged on the inner side or the outer side of the friction brake ring, and the driving mechanism drives the movement of the friction brake block to force the friction brake block to be frictionally combined with the side of the friction brake ring. The friction brake ring and the friction brake block are frictionally combined, the friction resistance between the two is utilized, the base and the movable disc assembly are locked, and the car seat is prevented from shaking.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile seats, in particular to a friction locking device for a rotating disc of an automobile seat. BACKGROUND

[0002] With the continuous development of the automobile industry, the market requirements for seats are also getting higher and higher, not only to meet the requirements of passengers on the comfort of the seat, but also to realize the functional requirements of passengers on the seat, which includes the demand for rotating seats. Rotating seats can meet the needs of various communication modes required by customers.

[0003] In the prior art, the rotation of the automobile seat is mainly realized by the rotating disc, wherein the rotating disc comprises a fixedly installed base and a rotatingly installed dynamic disc on the top of the base, the automobile seat is fixedly installed on the dynamic disc, and a gear disc is further arranged on the base. A motor is arranged on the dynamic disc, the output end of the motor is connected with a gear, the gear is in meshing transmission with the gear disc, the motor is driven to operate, and the rotation of the dynamic disc is realized.

[0004] However, due to the influence of manufacturing process and assembly process, there will be a gap between the gear and the gear plate, which will cause the seat to shake when the passenger is sitting, and this shaking will affect the comfort of sitting. SUMMARY

[0005] Therefore, the present application provides a friction locking device for a rotating disc of an automobile seat, which aims to avoid the shaking of the seat.

[0006] To achieve the above-mentioned purpose, the technical scheme of the present application is as follows:

[0007] A friction locking device for a rotating disc of an automobile seat, comprising a base and a dynamic disc assembly rotatingly arranged on the base, the top of the dynamic disc assembly being used for installing an automobile seat, characterized in that: a friction brake ring is fixedly arranged on the base, a friction brake block and a driving mechanism for controlling the movement of the friction brake block are movably connected to the dynamic disc assembly; the friction brake block is arranged on the inner side or the outer side of the friction brake ring, and the driving mechanism drives the friction brake block to move, so as to force the friction brake block to frictionally combine with the side of the friction brake ring.

[0008] By using the frictional combination between the friction brake block and the friction brake ring, the frictional resistance is utilized to form a locking between the base and the dynamic disc, thereby effectively preventing the seat from shaking.

[0009] As a preferred embodiment, one end of the friction brake block is rotatably connected to the dynamic disc assembly, and the driving mechanism drives the friction brake block to rotate, so as to make the friction brake block frictionally combine with the side of the friction brake ring. The above-mentioned structure has the advantages of simple structure, small space occupation and convenient friction locking control.

[0010] As preferred: the friction brake block has two groups, and the two groups of friction brake blocks are symmetrically arranged inside the friction brake ring, the driving mechanism comprises a slider movable relative to the dynamic disc assembly, two linkage plates hinged at both ends of the slider, and a transmission assembly driving the slider to move, and the two linkage plates are respectively hinged at both ends of the two groups of friction brake blocks. With the above structure, through the design of the two groups of friction brake blocks, the contact area with the friction brake ring is increased, so that the locking between the base and the dynamic disc assembly is more stable, and then the seat is prevented from shaking.

[0011] As preferred: the transmission assembly comprises a motor and a screw driven to rotate by the motor, and the middle part of the slider is threadedly sleeved on the screw. With the above structure, the slider is driven to slide on the screw by the motor, so that the friction brake block and the friction brake ring are combined by friction, and the operation is very convenient.

[0012] As preferred: the dynamic disc assembly comprises a dynamic disc and a mounting disc fixedly arranged on the top of the dynamic disc, and the driving mechanism and the friction brake block are arranged on the mounting disc. With the above structure, the mounting of the driving mechanism and the friction brake block can be facilitated, and the universality of the whole friction locking device can be ensured.

[0013] As preferred: the transmission assembly and the slider are arranged on the top of the mounting disc, the linkage plate and the friction brake block are arranged on the bottom of the mounting disc, the slider and the linkage plate are hinged together through a first pin shaft, a first slot is arranged on the mounting disc, and the first pin shaft is arranged in the first slot, the linkage plate and the friction brake block are hinged together through a second pin shaft, a second slot is arranged on the mounting disc, and the second pin shaft is arranged in the second slot, and one end of the friction brake block away from the linkage plate is rotatably arranged on the bottom of the mounting disc through a third pin shaft. With the above structure, when the slider moves on the screw, the linkage plate can be driven to rotate around the second pin shaft, and the friction brake block can be driven to rotate around the third pin shaft through the linkage plate.

[0014] As preferred: the friction brake block is an arc-shaped block, and the outer ring of the friction brake block has a friction section adapted to the inner side of the friction brake ring. With the above structure, the contact area between the friction brake block and the friction brake ring is increased, and the locking between the base and the dynamic disc assembly is further ensured to be stable.

[0015] As preferred: a tooth ring is arranged on the base, a driving motor is arranged on the top of the mounting disc, a gear is connected to the output end of the driving motor, and the gear and the tooth ring are meshed with each other. With the above structure, the dynamic disc assembly can be driven to rotate.

[0016] As preferred: the base is provided with an annular mounting cavity with an open upper end, and outer and inner positioning ring grooves are formed on the inside of the annular mounting cavity on both sides; the movable disc is rotationally connected in the annular mounting cavity, and the movable disc has an outer support ring located in the outer positioning ring groove and an inner support ring located in the inner positioning ring groove; and rotating support assemblies are installed between the outer support ring and the upper and lower sides of the outer positioning ring groove, and between the inner support ring and the upper and lower sides of the inner positioning ring groove. With the above structure, the movable disc can be rotationally supported on the top of the base, and the rotation of the movable disc is smoother.

[0017] As preferred: among the four groups of rotating support assemblies, three groups are ball structures, and the remaining one group is a sliding friction structure, which is arranged between the inner support ring and the upper side of the inner positioning ring groove. With the above structure, through the combination of three groups of ball structures and one group of sliding friction structures, the movable disc can be stably rotationally supported on the top of the base, and the frictional resistance between the movable disc and the base is increased through the sliding friction structure, further ensuring that the car seat will not shake.

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

[0019] 1. The automobile seat turntable friction locking device provided by the present application can form a lock between the base and the movable disc assembly by using the frictional resistance when the friction brake ring and the friction brake block are attached, thereby ensuring that the seat will not shake, and the automobile seat turntable friction locking device also plays an emergency braking role during the rotation of the seat.

[0020] 2. The friction locking of the friction brake ring and the friction brake block can realize stepless adjustment locking, ensuring that the seat can be locked at any angle. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a perspective view of the automobile seat turntable friction locking device;

[0022] Figure 2 It is a structure diagram showing the driving mechanism A;

[0023] Figure 3 It is a structure diagram showing the mounting disc 2b (the slider 6 is hidden);

[0024] Figure 4 It is a sectional view of the automobile seat turntable friction locking device;

[0025] Figure 5 It is a sectional view of the automobile seat turntable friction locking device; Figure 4

[0026] Figure 6 It is a sectional view of the automobile seat turntable friction locking device; Figure 4 ​a local enlarged view (the rotating support assembly has been hidden) of the detail

[0027] Figure 7 a structural schematic view of the friction brake block 8. DETAILED DESCRIPTION

[0028] The application will be further described below in conjunction with the embodiments and the accompanying drawings.

[0029] As shown in Figures 1 to 6 , a friction locking device for a turntable of an automobile seat, comprising a base 1 and a movable disc assembly 2 rotatably installed on the top of the base 1, wherein the base 1 is fixedly installed on the bottom of an automobile or a seat slide rail, and the top of the movable disc assembly 2 is used for fixedly installing an automobile seat. A friction brake ring 3 is fixedly installed on the base 1, and a friction brake block 8 and a driving mechanism A for controlling the movement of the friction brake block 8 are movably connected to the movable disc assembly 2. The friction brake block 8 is arranged on the inside or outside of the friction brake ring 3, and the driving mechanism A drives the friction brake block 8 to move, so as to force the friction brake block 8 to frictionally adhere to the side of the friction brake ring 3.

[0030] By driving the friction brake block 8 to frictionally adhere to the side of the friction brake ring 3 through the driving mechanism A, the frictional resistance between the friction brake block 8 and the friction brake ring 3 is utilized to form a lock between the base 1 and the movable disc assembly 2, so as to prevent the automobile seat from shaking.

[0031] As shown in Figure 2 and Figure 3 , one end of the friction brake block 8 is rotatably connected to the movable disc assembly 2, and the driving mechanism A drives the friction brake block 8 to rotate, so as to make the friction brake block 8 frictionally adhere to the side of the friction brake ring 3.

[0032] Specifically, as shown in Figure 2 , in this embodiment, there are two groups of friction brake blocks 8, which are symmetrically arranged on the inside of the friction brake ring 3. The driving mechanism A comprises a sliding block 6 movable relative to the movable disc assembly 2, two linkage plates 7 hingedly connected to the two ends of the sliding block 6, and a transmission assembly for driving the sliding block 6 to move. The ends of the two linkage plates 7 away from the sliding block 6 are respectively hingedly connected to the two groups of friction brake blocks 8. In this way, the contact area with the friction brake ring 3 is increased by the two groups of friction brake blocks 8, so as to ensure that the lock between the base 1 and the movable disc assembly 2 is more stable.

[0033] Further, the transmission assembly comprises a motor 4 and a lead screw 5 rotatably driven by the motor, and the middle part of the sliding block 6 is threadedly sleeved on the lead screw 5.

[0034] In this embodiment, the movable disc assembly 2 comprises a movable disc 2a and a mounting disc 2b fixedly installed on the top of the movable disc 2a by bolts, and the driving assembly A and the friction brake block 8 are both installed on the mounting disc 2b.

[0035] Specifically, as shown in Figures 1 to 3 The transmission assembly and the sliding block 6 are installed on the top of the mounting disc 2b, and the linkage plate 7 and the friction brake block 8 are installed on the bottom of the mounting disc 2b. The sliding block 6 and the linkage plate 7 are hinged together through the first pin shaft 9, the mounting disc 2b is formed with a first strip-shaped hole 2b1, and the first pin shaft 9 is arranged in the first strip-shaped hole 2b1. The linkage plate 7 and the friction brake block 8 are hinged together through the second pin shaft 10, and the mounting disc 2b is further formed with a second strip-shaped hole 2b2, and the second pin shaft 10 is arranged in the second strip-shaped hole 2b2. The end of the friction brake block 8 away from the linkage plate 7 is rotatably installed on the bottom of the mounting disc 2b through the third pin shaft 11. In this way, when the sliding block 6 moves on the lead screw 5, it can drive the linkage plate 7 to rotate around the second pin shaft 10, and then drive the friction brake block 8 to rotate around the third pin shaft 11. The first pin shaft 9 arranged in the first strip-shaped hole 2b1 can ensure that the sliding block 6 can move on the lead screw 5 when the motor 4 rotates, instead of rotating with the lead screw 5. The second pin shaft 10 arranged in the second strip-shaped hole 2b2 ensures that the friction brake block 8 can rotate.

[0036] Through the above sliding block and crank mechanism, the rotating force of the lead screw 5 can be amplified, so that the locking of the friction brake block 8 is further stable.

[0037] Specifically, in combination with Figure 2 When the sliding block 6 moves along the lead screw 5 towards the center of the mounting disc 2b, it can drive the linkage plate 7 to rotate inward around the second pin shaft 10, and at the same time, the linkage plate 7 forces the friction brake block 8 to rotate outward around the third pin shaft 11. When the friction brake block 8 rotates outward and contacts the inner side of the friction brake ring 3, the base 1 and the movable disc 2a can form a lock under the influence of the friction resistance. When the automobile seat is in a rotating state, the automobile seat turntable friction locking device at this time plays the role of a brake. When the automobile seat is in a prohibited state, the automobile seat turntable friction locking device at this time can ensure that the automobile seat does not sway. When the sliding block 6 moves along the lead screw 5 away from the center of the mounting disc 2b, it can drive the linkage plate 7 to rotate outward around the second pin shaft 10, and at the same time, the linkage plate 7 forces the friction brake block 8 to rotate inward around the third pin shaft 11. When the friction brake block 8 is separated from the inner side of the friction brake ring 3, the entire automobile seat turntable friction locking device is in an unlocked state, and the automobile seat can rotate normally.

[0038] As Figure 7As shown, in the embodiment, the friction brake block 8 is configured as an arc structure, and the outer ring of the friction brake block 8 is formed with a friction section 8a adapted to the inner side of the friction brake ring 3, and the friction section 8a and the inner side of the friction brake ring 3 can form a friction resistance, thereby forming a locking between the base 1 and the movable disc 2a. The friction brake block 8 further comprises a connecting section 8b, and a connecting plate 8c is formed between the connecting section 8b and the friction section 8a. The connecting plate 8c can make the structure of the friction section 8a more stable, and at the same time, the whole friction brake block 8 is lighter, which is convenient for the sliding block 6 to drive it to rotate.

[0039] As shown in Figure 2 and Figure 4 The base 1 is fixedly provided with a tooth ring 12. In the embodiment, the tooth ring 12 is an inner tooth ring, and the top of the mounting disc 2b is further fixedly provided with a driving motor 13. The output end of the driving motor 13 is connected with a gear 14, and the gear 14 and the tooth ring 12 can be engaged with each other. In this way, the driving motor 13 can drive the gear 14 to rotate around the tooth ring 12, thereby electrically controlling the rotation of the automobile seat.

[0040] As shown in Figure 5 and Figure 6 The base 1 is provided with an annular mounting cavity 1a with an open upper end. The annular mounting cavity 1a is internally formed with an outer positioning ring groove 1a1 and an inner positioning ring groove 1a2 on both sides. The movable disc 2a is rotatably mounted in the annular mounting cavity 1a, and has an outer support ring 2a1 located in the outer positioning ring groove 1a1 and an inner support ring 2a2 located in the inner positioning ring groove 1a2. Rotating support assemblies are mounted between the upper and lower sides of the outer support ring 2a1 and the outer positioning ring groove 1a1 and between the upper and lower sides of the inner support ring 2a2 and the inner positioning ring groove 1a2. In this way, the movable disc 2a can be stably supported and rotated on the base 1.

[0041] Specifically, in the embodiment, three groups of the four rotating support assemblies are in a ball structure, and the remaining one group is in a sliding friction structure. In the embodiment, the sliding friction structure is preferably arranged between the upper side of the inner support ring 2a2 and the inner positioning ring groove 1a2. In this way, by replacing the traditional four groups of ball structures with three groups of ball structures and one group of sliding friction structures, the movable disc 2a can be stably supported and rotated on the base 1, and the sliding gap of the movable disc 2a is eliminated through the sliding friction structure, thereby further ensuring that the automobile seat will not shake.

[0042] Further, the ball structure comprises a retainer 15 fixedly installed on the top of the base 1 and the top of the outer support ring 2a1, and a ball assembly 16 arranged in an annular array outside the retainer 15. In the embodiment, the three retainers 15 are annular structures, and the sliding friction structure is a friction block 17 arranged between the inner support ring 2a2 and the upper side of the inner positioning ring groove 1a2. In the embodiment, the friction block 17 is an arc-shaped block, and four friction blocks 17 are arranged between the inner support ring 2a2 and the upper side of the inner positioning ring groove 1a2. The four friction blocks 17 are arranged in an annular array, and the four friction blocks 17 are all made of POM. In this way, the sliding friction structure has a lighter weight and better wear resistance.

[0043] For example Figure 5 and Figure 6 As shown in FIGS. 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 and 15, the base 1 is further fixedly installed with a first compression ring 18 and a second compression ring 19, and the radius of the first compression ring 18 is greater than that of the second compression ring 19. The outer circle of the first compression ring 18 and the inner circle of the second compression ring 19 are both tightly attached to the base 1 and fixedly installed by bolts. The outer positioning ring groove 1a1 is formed between the inner circle of the first compression ring 18 and the base 1, and the inner positioning ring groove 1a2 is formed between the outer circle of the second compression ring 19 and the base 1. In this way, the assembly of the entire dynamic disc 2a and the rotating support assembly is facilitated. In addition, in the embodiment, the friction brake ring 3 and the tooth ring 12 are both fixedly installed on the inner circle of the second compression ring 19.

[0044] Finally, it should be noted that the above description is only for the preferred embodiments of the present application, and those of ordinary skill in the art can make various similar modifications under the inspiration of the present application without departing from the purpose and scope of the present application. Such modifications all fall within the protection scope of the present application.

Claims

1. A friction locking device for a swivel seat of a vehicle, comprising a base (1) and a movable disc assembly (2) rotatably arranged on the base (1), the movable disc assembly (2) having a top portion for mounting a vehicle seat, characterized in that: The base (1) is provided with a friction brake ring (3), the movable disc assembly (2) is movably connected with a friction brake block (8), and a driving mechanism (A) is arranged to control the movement of the friction brake block (8); The friction brake block (8) is arranged inside or outside the friction brake ring (3), and the driving mechanism (A) drives the friction brake block (8) to move, so that the friction brake block (8) is forced to be frictionally combined with the side of the friction brake ring (3); One end of the friction brake block (8) is rotatably connected to the movable disc assembly (2), and the driving mechanism (A) drives the friction brake block (8) to rotate, so that the friction brake block (8) is frictionally combined with the side of the friction brake ring (3); The friction brake block (8) has two groups, and the two groups of friction brake blocks (8) are symmetrically arranged inside the friction brake ring (3), the driving mechanism (A) includes a sliding block (6) movable relative to the movable disc assembly (2), two linkage plates (7) hingedly connected at both ends of the sliding block (6), and a transmission assembly for driving the sliding block (6) to move, and one end of each of the two linkage plates (7) away from the sliding block (6) is hingedly connected to the two groups of friction brake blocks (8); The transmission assembly includes a motor (4) and a screw rod (5) driven to rotate by the motor (4), and the middle part of the sliding block (6) is threadedly sleeved on the screw rod (5).

2. The automotive seat swivel friction lock device of claim 1, wherein: The movable disc assembly (2) includes a movable disc (2a) and a mounting disc (2b) fixedly arranged on the top of the movable disc (2a), and the driving mechanism (A) and the friction brake block (8) are arranged on the mounting disc (2b).

3. The automotive seat swivel friction lock device of claim 2, wherein: The transmission assembly and the sliding block (6) are arranged on the top of the mounting disc (2b), the linkage plate (7) and the friction brake block (8) are arranged on the bottom of the mounting disc (2b), the sliding block (6) and the linkage plate (7) are hingedly connected through a first pin shaft (9), a first slot (2b1) is arranged on the mounting disc (2b), the first pin shaft (9) is arranged in the first slot (2b1), the linkage plate (7) and the friction brake block (8) are hingedly connected through a second pin shaft (10), a second slot (2b2) is arranged on the mounting disc (2b), the second pin shaft (10) is arranged in the second slot (2b2), and one end of the friction brake block (8) away from the linkage plate (7) is rotatably arranged on the bottom of the mounting disc (2b) through a third pin shaft (11).

4. The automotive seat swivel friction lock device of claim 3, wherein: The friction brake block (8) is an arc-shaped block, and the outer ring of the friction brake block (8) has a friction segment (8a) adapted to the inside of the friction brake ring (3).

5. The automobile seat turntable friction locking device according to claim 2, characterized in that: A gear ring (12) is arranged on the base (1), a driving motor (13) is arranged on the top of the mounting disc (2b), a gear (14) is connected to the output end of the driving motor (13), and the gear (14) and the gear ring (12) are meshed with each other.

6. The automotive seat swivel friction lock device of claim 2, wherein: The base (1) is provided with an annular mounting cavity (1a) with an open upper end, and outer and inner positioning ring grooves (1a1) and (1a2) are respectively formed on the two sides of the annular mounting cavity (1a); The movable disc (2a) is rotationally connected in the annular mounting cavity (1a), and has an outer support ring (2a1) located in the outer positioning ring groove (1a1) and an inner support ring (2a2) located in the inner positioning ring groove (1a2); Rotary support assemblies are installed between the outer support ring (2a1) and the upper and lower sides of the outer positioning ring groove (1a1) and between the inner support ring (2a2) and the upper and lower sides of the inner positioning ring groove (1a2).

7. The automotive seat swivel friction lock device of claim 6, wherein: Among the four groups of rotary support assemblies, three groups are ball structures, and the remaining one group is a sliding friction structure, which is arranged between the inner support ring (2a2) and the upper side of the inner positioning ring groove (1a2).

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