Swivel bearing device for a vehicle seat

Abstract

Rotary bearing device for a vehicle seat, comprising a brake drum (20) inserted into a receiving section (13) defined between an inner edge (11) and an outer edge (12) positioned on a surface of a housing (10), wherein the brake drum (20) has receiving grooves (21) along an inner diameter section thereof, and brake elements (30) arranged along a space between the inner edge (11) of the housing (10) and the inner diameter section of the brake drum (20).

Description

[0001] The invention relates to a rotary bearing device (e.g. a turntable device) for a vehicle seat.

[0002] In general, vehicle seats can be equipped with various types of comfort devices to provide passengers with a comfortable ride and convenience. Examples of vehicle seat comfort devices include a seat rail device configured to move a vehicle seat forward or backward to adapt it to a passenger's body type, a leg rest configured to support a passenger's leg, and a swivel device configured to rotate a vehicle seat.

[0003] The state-of-the-art swivel bearing device for a vehicle seat can comprise an electric motor and a rotating part connected to the vehicle seat. A pinion of the electric motor can mesh with a ring gear of the rotating part. When the electric motor is operating, its power can be transmitted to the rotating part, allowing the vehicle seat to rotate.

[0004] However, in the case of a swivel bearing device for a vehicle seat, problems can occur according to the state of the art, such as a deterioration in operational sensitivity, play, and abnormal noises caused by increased tolerances, dimensional accuracy, gear backlash, and the like. In particular, backlash between the gears can be a factor that reduces the stability of the vehicle seat.

[0005] A patent document relating to the state of the art is the Korean patent application with publication number 10-2020-0078903 (published on July 2, 2020).

[0006] The invention provides a rotary bearing device for a vehicle seat which can improve the operational sensitivity by positioning a separate drive module between a fixed part and a rotating part of a rotary bearing, improve the stability of a stationary state by eliminating play caused by an external force, and achieve rotary operation with stable and excellent sensitivity by solving a sensitivity deviation problem corresponding to the degree to which teeth are engaged, by means of an operating mechanism that uses a prior art method for coupling gears, and by solving a stability deterioration problem caused by play between an electric motor and a gear.

[0007] According to the invention, a rotary bearing device (e.g. a turntable device) is provided for a vehicle seat, wherein the rotary bearing device comprises: a brake drum inserted into a receiving section defined between an inner edge (e.g. an inner rim) and an outer edge (e.g. an outer rim) provided on a surface of a housing, wherein the brake drum has receiving grooves along an inner diameter section thereof, and brake elements arranged along a space between the inner edge of the housing and the inner diameter section of the brake drum.

[0008] Furthermore, the brake element may include: a spring element, and rollers that are provided on two opposite sides of the spring element and are positioned in the receiving grooves.

[0009] Furthermore, a clutch drum can be coupled to an upper section of the housing, and the clutch drum can have: a hub inserted into an inner diameter section of the inner rim, pressing projections provided along a circumference of the hub and positioned between the brake elements to press the rollers, and a second gear part provided on an inner diameter section of the clutch drum and configured to mesh with a first gear part of an electric motor.

[0010] Furthermore, a first cover can be located on an upper section of an edge section and an upper section of the outer edge in a state in which the edge section provided along a circumference of the brake drum is inserted into the receiving section.

[0011] Furthermore, the clutch drum may be surrounded by a second cover, and an edge of the second cover may be coupled to an upper section of the brake drum.

[0012] Furthermore, a rotary holder can be coupled to the second cover, and the rotary holder can have: a main body that sits on an edge of the second cover, and an extension section that extends from the main body and is coupled to a rotary bearing plate (e.g. a turntable plate).

[0013] Furthermore, a seat can be placed on the swivel bearing plate.

[0014] Furthermore, the electric motor can be supported on a support frame, and the first gear part can penetrate the support frame and engage with the second gear part.

[0015] Furthermore, the width between the receiving groove and the inner edge of two opposite ends of the receiving groove can decrease towards the pressing projection, so that the roller is fitted (e.g. inserted), and the width can increase from two opposite ends of the pressing projection towards the two opposite ends of the receiving groove, so that the roller is released (e.g. loosened).

[0016] Furthermore, the second cover can be coupled to the brake drum by screwing it on, the main body of the rotary holder can be coupled to the edge of the second cover and the brake drum by screwing it on in a state in which the main body sits on the edge of the second cover, and the extension section of the rotary holder can be coupled to the slewing bearing plate by screwing it on.

[0017] Furthermore, two opposite ends of the pressure projection can be configured as curved surfaces that fit the rollers.

[0018] According to the present invention, the brake drum rotates in the state in which the brake drum is mounted in the receiving section of the housing, so that the brake drum can rotate stably without being twisted (e.g. distorted, e.g. displaced) by an external force.

[0019] Furthermore, the present invention can offer comfort to the passengers in the vehicle.

[0020] Furthermore, according to the present invention, the shape of the brake drum is simplified compared to a brake drum according to the prior art, making it possible to improve mass production and the handling of the product.

[0021] The invention is explained in more detail with reference to the drawing. The drawing shows: Fig. 1 a perspective view of a swivel bearing device for a vehicle seat according to an exemplary embodiment of the invention; Fig. 2 a perspective exploded view of the rotary bearing device for a vehicle seat according to the exemplary embodiment of the invention; Fig. 3 a cross-sectional side view of the swivel bearing device for a vehicle seat according to the exemplary embodiment of the invention; Fig. 4 a view of a state in which a roller of a brake element according to the exemplary embodiment of the invention is pressed by a pressing projection; and Fig. 5 a view of an operation of the rotary bearing device for a vehicle seat according to the exemplary embodiment of the invention.

[0022] It is understood that the attached drawings are not necessarily to scale and present a somewhat simplified representation of various features that illustrate the basic principles of the invention. The specific design features of the present invention, as disclosed herein, which include, for example, specific dimensions, orientations, arrangements, and shapes, are partly determined by the intended application and environment of use.

[0023] In the figures, the reference numerals refer to the same or equivalent parts of the present invention across the different figures of the drawing.

[0024] Exemplary embodiments of the present invention are described in detail below with reference to the accompanying drawings. First, when assigning reference numerals to the components in the respective drawings, it should be noted that the same components are designated by the same reference numerals whenever possible, even if the components are shown in different drawings. Furthermore, in the description of the present invention, specific descriptions of publicly known, related configurations or functions are omitted if it is determined that such specific descriptions could obscure the subject matter of the present invention. The exemplary embodiments of the present invention are described below; however, the technical scope of the present invention is not limited to these and can, of course, be modified and implemented in various ways by technically skilled persons.

[0025] Fig. Figure 1 is a perspective view of a swivel bearing device for a vehicle seat according to an exemplary embodiment of the invention. Fig. Figure 2 is a perspective exploded view of the rotary bearing device for a vehicle seat according to the exemplary embodiment of the invention. Fig. Figure 3 is a cross-sectional side view of the swivel bearing device for a vehicle seat according to the exemplary embodiment of the invention, and Fig. Figure 4 shows a view of a state in which a roller of a brake element according to the exemplary embodiment of the invention is pressed by a pressure projection.

[0026] As in the Fig. As shown in Figures 1 to 4, a rotary bearing device for a vehicle seat according to the present invention can have a brake drum 20 which is inserted and mounted in a receiving section 13 of a housing 10, and brake elements 30 which are arranged along a space between an inner edge 11 of the housing 10 and an inner diameter section of the brake drum 20.

[0027] As described above, the brake elements 30 rotate in the state in which they are inserted into the receiving section 13. Therefore, the brake elements 30 can rotate stably without being twisted by an external force.

[0028] The inner rim 11 and an outer rim 12 can be provided on a surface of the housing 10. The receiving section 13 can be formed between the inner rim 11 and the outer rim 12.

[0029] The brake drum 20 can be configured in a ring shape and have receiving grooves 21 and an edge section 22.

[0030] The receiving grooves 21 can be provided along the inner diameter section of the brake drum 20.

[0031] The brake elements 30 can be arranged at predetermined intervals from each other along the space between the inner edge 11 of the housing 10 and the inner diameter section of the brake drum 20 when the brake drum 20 is inserted into the receiving section 13 of the housing 10.

[0032] The brake element 30 can include a spring element 31 and rollers 32, for example, formed from these components. The spring element 31 can, for instance, be a coil spring.

[0033] The rollers 32 can be provided on two opposite sides of the spring element 31. The rollers 32 can be positioned in the receiving groove 21.

[0034] A clutch drum 50 can be coupled to an upper section of the housing 10. The clutch drum 50 can have a hub 51, press projections 52, and a second gear part 53 configured to mesh with a first gear part 41 of an electric motor 40.

[0035] An outer diameter section of the hub 51 can be configured to fit the inner diameter section of the inner rim 11. The hub 51 can be inserted into and mounted in the inner diameter section of the inner rim 11.

[0036] The pressure projections 52 can be provided at predetermined intervals from one another along a circumference of the hub 51.

[0037] The pressure projections 52 can be positioned between the brake elements 30 to press the rollers 32 of the brake elements 30.

[0038] Two opposite ends of the pressure projection 52 can be configured as curved surfaces 521 that fit with the rollers 32 of the brake element 30.

[0039] The second gear part 53, which engages with the first gear part 41 of the electric motor 40, can be provided along an inner diameter section of the clutch drum 50.

[0040] For example, the first gear part 41 of the electric motor 40 can be a pinion.

[0041] The clutch drum 50 can rotate when power from the electric motor 40 is transmitted via the first gear part 41 to the second gear part 53.

[0042] The electric motor 40 can be stably supported on a support frame 90. The first gear part 41 can penetrate the support frame 90 and engage with the second gear part 53.

[0043] A first cover 61 can, in the state in which the edge section 22, which is provided along a circumference of the brake drum 20, is inserted into the receiving section 13 of the housing 10, sit on an upper section of the edge section 22 and an upper section of the outer edge 12.

[0044] The first cover 61 can be coupled to the housing 10 by screwing it B.

[0045] As described above, since the first cover 61 blocks an upper side of the edge section 22 of the brake drum 20, it is possible to prevent the brake drum 20, which is inserted into the receiving section 13 of the housing 10, from being pulled back. Therefore, the brake drum 20 can rotate stably in the state in which it is inserted into the receiving section 13.

[0046] The clutch drum 50 can be surrounded by a second cover 62. An edge 621 of the second cover 62 can be coupled to an upper section of the brake drum 20 by screwing it B.

[0047] A rotary holder 70 can be coupled to the second cover 62. The rotary holder 70 can have a main body 71 and extension sections 72.

[0048] The main body 71 can be coupled to the edge 621 of the second cover 62 and the brake drum 20 by screwing B simultaneously in the state in which the main body 71 is seated on the edge 621 of the second cover 62.

[0049] The extension sections 72 can extend from the main body 71. The extension sections 72 can be provided as a plurality of extension sections 72 attached to the main body 71. The extension sections 72 can be coupled to a pivot bearing plate 80 by bolting B.

[0050] With regard to the Fig. 4 and Fig. 5 The width W between the receiving groove 21 of the brake drum 20 and the inner edge 11 of the housing 10 can decrease from two opposite ends of the receiving groove 21 towards the pressing projection 52 of the clutch drum 50, so that the rollers 32 can be fitted.

[0051] The width W between the receiving groove 21 of the brake drum 20 and the inner edge 11 of the housing 10 can increase from the two opposite ends of the pressing projection 52 of the clutch drum 50 towards the two opposite ends of the receiving groove 21, so that the rollers 32 can be released.

[0052] Next, an operation of the rotary bearing device for a vehicle seat according to the invention will be described.

[0053] Fig. Figure 5 shows a view of the operation of the rotary bearing device for a vehicle seat according to the exemplary embodiment of the invention.

[0054] As in Fig. As shown in 5A, the first gear part 41 can be rotated by operating the electric motor 40.

[0055] As in Fig. As shown in Figure 5B, the second gear part 53, which engages with the first gear part 41, can rotate when the first gear part 41 rotates.

[0056] The clutch drum 50 inserted into the receiving section 13 of the housing 10 can rotate when the second gear part 53 rotates.

[0057] As in Fig. As shown in Figure 5C, the pressure projection 52 of the clutch drum 50 can press the roller 32 of the brake element 30 on one side when the clutch drum 50 rotates.

[0058] The roller 32 of the brake element 30 can be pressed through the pressure projection 52 on one side and positioned at one end of the receiving groove 21.

[0059] When the pressure projection 52, in the state in which the roller 32 is positioned at one end of the receiving groove 21, continues to press the roller 32, the brake drum 20 can rotate.

[0060] As in Fig. As shown in Figure 5D, the second cover 62, which is coupled to the brake drum 20 by screwing B to it, can rotate when the brake drum 20 rotates.

[0061] The rotary holder 70, which is coupled to the edge 621 of the second cover 62 and the brake drum 20 by screwing B simultaneously, can rotate when the second cover 62 rotates.

[0062] The rotary bearing plate 80, coupled to the rotary holder 70 by screwing B, can rotate when the rotary holder 70 rotates.

[0063] The seat mounted on the pivot plate 80 (e.g. a driver's or passenger's seat; not shown) can rotate or rotates when the pivot plate 80 rotates.

[0064] Meanwhile, if the rollers 32 of the brake elements 30 are moved in a reverse direction by an external force, i.e., towards the pressing projections 52, the rollers 32 are fitted between the inner edge 11 of the housing 10 and the receiving grooves 21 of the brake drum 20, thus limiting the rotation of the brake drum 20. Therefore, it is possible to prevent reverse rotation of the brake drum 20.

[0065] As described above, according to the present invention, the brake drum rotates in the state in which it is mounted in the receiving section of the housing, so that the brake drum can rotate stably without being twisted by an external force. Furthermore, according to the present invention, the shape of the brake drum is simplified compared to a brake drum according to the prior art, thus making it possible to improve mass production and the handling of the product. Reference symbol list 10 cases 11 inner edge 12 outer edge 13 Recording section 20 brake drums 21 recordings 22 marginal section 30 Brake element 31 Spring element 32 rolls 40 electric motor 41 First gear part 50 Clutch drum 51 hub 52 pressure advantage 521 Curved surface 53 Second gear part 61 First Cover 62 Second cover 621 Rand 70 rotary holders 71 Main body 72 Extension section 80 Swivel bearing plate QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] KR 10-2020-0078903

[0005]

Claims

[1] Swivel bearing device for a vehicle seat, wherein the swivel bearing device comprises: a brake drum (20) which is inserted into a receiving section (13) defined between an inner rim (11) and an outer rim (12) which are positioned on a face of a housing (10), wherein the brake drum (20) has receiving grooves (21) along an inner diameter section thereof, and Brake elements (30) arranged along a space between the inner edge (11) of the housing (10) and the inner diameter section of the brake drum (20). [2] Rotary bearing device according to claim 1, wherein each of the brake elements (30) comprises: a spring element (31), and Rollers (32) are arranged on two opposite sides of the spring element (31) and are positioned in the receiving grooves (21). [3] Rotary bearing device according to claim 2, further comprising: a coupling drum (50) which is coupled to an upper section of the housing (10), wherein the clutch drum (50) has: a hub (51) which is inserted into the inner diameter section of the inner rim (11), Pressing projections (52) positioned along a circumference of the hub (51) and between the brake elements (30) to press the rollers (32), and a second gear part (53) which is positioned on an inner diameter section of the clutch drum (50) and is configured to engage with a first gear part (41) of an electric motor (40). [4] Rotary bearing device according to claim 3, further comprising: a first cover (61), wherein the first cover (61) is located on an upper section of an edge section (22) of the brake drum (20) and an upper section of the outer edge (12) of the housing (10) in a state in which the edge section (22) positioned along a circumference of the brake drum (20) is inserted into the receiving section (13). [5] Rotary bearing device according to claim 3 or 4, wherein the clutch drum (50) is surrounded by a second cover (62) and an edge (621) of the second cover (62) is coupled to an upper section of the brake drum (20). [6] Rotary bearing device according to claim 5, further comprising: a rotating holder (70) coupled to the second cover (62), wherein the rotary holder (70) has: a main body (71) that sits on the edge (621) of the second cover (62), and an extension section (72) extending from the main body (71) and coupled to a rotary bearing plate (80). [7] Rotary bearing device according to claim 6, wherein a seat is located on the rotary bearing plate (80). [8] Rotary bearing device according to one of claims 3 to 7, wherein the electric motor (40) is supported on a support frame (90), and the first gear part (41) of the electric motor (40) penetrates the support frame (90) to engage with the second gear part (53). [9] Rotary bearing device according to any one of claims 3 to 8, wherein a width (W) between each of the receiving grooves (21) and the inner edge (11) decreases from two opposite ends of each of the receiving grooves (21) towards each corresponding of the press projections (52) to allow each corresponding of the rollers (32) to be fitted, and the width (W) increases from two opposite ends of each corresponding of the press projections (52) towards the two opposite ends of each of the receiving grooves (21) to allow each corresponding of the rollers (32) to be released. [10] Rotary bearing device according to claim 6 or 7, wherein the second cover (62) is coupled to the brake drum (20) by screwing (B), the main body (71) of the rotary holder (70) is coupled to the edge (621) of the second cover (62) and the brake drum (20) by screwing (B) in a state in which the main body (71) is seated on the edge (621) of the second cover (62) and the brake drum (20), and the extension section (72) of the rotary holder (70) is coupled to the rotary bearing plate (80) by screwing (B). [11] Rotary bearing device according to any one of claims 3 to 10, wherein two opposite ends of each of the pressure projections (52) are configured as curved surfaces that fit together with the rollers (32).

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