EP-4741225-A1 - POWER SWIVEL DEVICE HAVING MANUAL OPERATION DEVICE FOR VEHICLE SEAT

EP4741225A1EP 4741225 A1EP4741225 A1EP 4741225A1EP-4741225-A1

Abstract

A power swivel device includes a manual operation device for a vehicle seat configured to release a clutch drum and a brake drum of the power swivel device from a restrained state or to allow a vehicle seat, which is connected to a rotary plate, to be manually rotated by releasing the brake drum and the rotary plate from a restrained state in a state in which a motor is stopped.

Inventors

KIM, WON
LIM, Heoung Su
PARK, Heejun

Assignees

Hyundai Transys Inc.

Dates

Publication Date: 20260513
Application Date: 20251104

Claims (15)

A power swivel device for a vehicle seat, the power swivel device comprising: a manual operation device configured to allow manual rotation of a vehicle seat connected to a rotary plate by releasing a clutch gear and a brake drum of the power swivel device from a first restrained state or by releasing the brake drum and the rotary plate from a second restrained state when a motor of the power swivel device is stopped.
The power swivel device of claim 1, wherein the manual operation device comprises: a locking pin having a lower portion configured to penetrate the rotary plate and to be inserted into a locking groove positioned on the brake drum; a support frame spaced apart from the rotary plate at an interval and positioned above the rotary plate, the support frame having an upper surface having an insertion hole into which an upper portion of the locking pin is inserted, the support frame having a seating portion extending from an outer-diameter portion of the support frame, the seating portion being connected to the rotary plate, the support frame being elastically supported by a first spring coupled to the locking pin; and a support member positioned between the support frame and the rotary plate and having a support portion extending from an outer-diameter portion of the support member, the support portion being configured to support the locking pin.
The power swivel device of claim 2, wherein a catching projection is positioned on an outer-diameter portion of the locking pin, and the first spring is positioned between the catching projection and the support frame in a state in which the first spring is caught by the catching projection, wherein a first protruding portion positioned on an inner-diameter portion of the support frame and a second protruding portion positioned on the outer-diameter portion of the support member are connected by a hinge shaft, and wherein the support portion supports the catching projection while surrounding the outer-diameter portion of the locking pin, wherein, optionally, when a wire connected to the support member is pulled in an unlocking direction, the second protruding portion is configured to rotate downward about the hinge shaft, the support portion is configured to push the catching projection upward, a lower portion of the locking pin is configured to depart from the locking groove of the brake drum and a penetrated portion of the rotary plate when the support portion pushes the catching projection upward, and the brake drum and the rotary plate are configured to be released from the second restrained state, such that the vehicle seat connected to the rotary plate is rotatable manually.
The power swivel device of claim 1, wherein an inner-diameter portion of the brake drum has a first locking groove positioned thereon, and an inner-diameter portion of the rotary plate has a second locking groove positioned thereon, wherein the manual operation device comprises: a locking pin configured to be simultaneously inserted into the first locking groove positioned on the inner-diameter portion of the brake drum and the second locking groove positioned on the inner-diameter portion of the rotary plate; and a spring having one end connected to the locking pin and another end connected to the rotary plate.
The power swivel device of claim 4, wherein the manual operation device further includes a pulling member configured to be disposed in the first locking groove and the second locking groove, wherein when a wire connected to the pulling member is pulled in an unlocking direction, the locking pin inserted into the first locking groove and the second locking groove is configured to be pushed in the unlocking direction by the pulling member, the locking pin and the pulling member are configured to depart from the first locking groove and the second locking groove, and the brake drum and the rotary plate are configured to be released from the second restrained state, such that the vehicle seat connected to the rotary plate is rotatable manually.
The power swivel device of claim 1, wherein an inner-diameter portion of the brake drum has a first locking groove positioned thereon, and an inner-diameter portion of the rotary plate has a second locking groove positioned thereon, wherein the manual operation device for a vehicle seat comprises: a locking pin configured to be simultaneously inserted into the first locking groove positioned on the inner-diameter portion of the brake drum and the second locking groove positioned on the inner-diameter portion of the rotary plate; and an unlocking member positioned above the rotary plate, having an inner-diameter portion having a third locking groove configured to be inserted with the locking pin, and having an outer-diameter portion from which a lever extends, wherein, optionally, when the lever is rotated in an unlocking direction, the locking pin inserted into the third locking groove is configured to be pushed in a first direction by the inner-diameter portion of the unlocking member by the rotation of the unlocking member, the locking pin is configured to depart from the first locking groove, the second locking groove, and the third locking groove, and the brake drum and the rotary plate are configured to be released from the second restrained state, such that the vehicle seat connected to the rotary plate is rotatable manually.
The power swivel device of anyone of claims 1-6, wherein the manual operation device for a vehicle seat comprises: a lift member positioned below a housing and having a pressing pin configured to push a pressing protrusion upward in an unlocking direction to separate the pressing protrusion from the clutch gear, the pressing protrusion being coupled to the clutch gear accommodated in the housing; and an actuator configured to push the lift member upward.
The power swivel device of claim 7, wherein when the lift member is pushed upward in the unlocking direction by the actuator, the pressing pin is configured to penetrate a first through-hole of the housing and a second through-hole of the clutch gear and push an insertion protrusion upward in the unlocking direction, the insertion protrusion being positioned on a lower portion of the pressing protrusion and configured to be inserted into the second through-hole, the pressing protrusion is configured to be separated from the clutch gear, and the clutch gear and the brake drum are configured to be released from the first restrained state, and wherein the rotary plate is connected to the brake drum, and when the clutch gear and the brake drum are released form the first restrained state, the brake drum and the rotary plate are configured to be integrally rotated when a rotary lever positioned on a rotary member connected to the brake drum rotates, such that the vehicle seat connected to the rotary plate is rotatable manually.
The power swivel device of anyone of claims 1-8, further comprising: a housing having an inner-diameter portion having at least one cut-out portion; and a brake module inserted into the housing and comprising the brake drum, wherein the clutch gear has gear teeth positioned along an inner-diameter portion thereof, at least one portion of the gear teeth being exposed through the at least one cut-out portion, the gear teeth being configured to engage with a pinion gear of the motor in a state in which the clutch gear is inserted into the housing, wherein at least one stopper is positioned on the brake drum, and wherein the at least one stopper is configured to restrict an additional rotation of the brake drum in a hard stop state in which an operation of the brake drum is stopped.
The power swivel device of claim 9, wherein the housing comprises: a first accommodation portion positioned in the housing adjacent to the inner-diameter portion of the housing and having the clutch gear inserted therein; and a second accommodation portion configured to communicate with the first accommodation portion and positioned in the housing adjacent to an outer edge of the housing while defining a stepped portion together with the first accommodation portion, the second accommodation portion having a height higher than a height of the first accommodation portion, wherein the brake module further comprises a brake ring inserted into the second accommodation portion, and wherein the brake drum is seated on the clutch gear and positioned at a height same as a height of the brake ring.
The power swivel device of claim 9 or 10, wherein the at least one stopper is positioned on an inner-diameter portion of the brake drum to correspond to a position of the pinion gear, and the at least one stopper is configured to surround at least a part of a circumference of the pinion gear.
The power swivel device of anyone of claims 9-11, wherein the clutch gear has a double injection molding structure comprising a gear part and a main body part configured to surround an edge portion of the gear part.
The power swivel device of anyone of claims 9-12, further comprising: a position switch configured to prevent an erroneous operation of the clutch gear, wherein the position switch is configured to determine that a position of the clutch gear is an abnormal position when the clutch gear is stopped when the position switch is in a turn-on state, or determine that the position of the clutch gear is a normal position when the clutch gear is stopped while the position switch is turned off.
The power swivel device of claim 10, or of anyone of claims 11-13 provided that in combination with claim 10, wherein a brake member is positioned between an inner-diameter portion of the brake ring and an outer-diameter portion of the brake drum, wherein the brake member is configured to be in a brake state when the brake member is positioned between pressing protrusions disposed along an edge of one surface of the clutch gear, and wherein the brake member is configured to switch from the brake state to a brake release state by being pushed by the pressing protrusions when the clutch gear rotates, wherein, optionally, the brake member comprises: an elastic member; and rollers disposed at two opposite sides of the elastic member to be directed toward the pressing protrusions, the rollers being elastically supported by the elastic member, wherein, optionally, the brake drum has support surfaces positioned on the outer-diameter portion thereof, wherein, optionally, each of the rollers is configured to be wedged between an inner-diameter portion of the brake drum and each of the support surfaces to implement the brake state, and wherein, optionally, each of the rollers is configured to be released from being wedged to implement the brake release state when each of the rollers is pushed by each of the pressing protrusions and positioned in a support groove positioned at one end of each of the support surfaces.
The power swivel device of claim 10, or of anyone of claims 11-14 provided that in combination with claim 10, wherein a cover is coupled to an upper surface of the housing above the clutch gear, the brake ring, and the brake drum, and wherein the cover is seated on an upper surface of the brake ring, pressing protrusions of the clutch gear, and a seating surface positioned at an edge of the brake drum, wherein, optionally, a clip is disposed on an outer-diameter portion of the cover, and a coupling hole defined in the clip is coupled to a coupling protrusion disposed on an outer-diameter portion of the housing, and/or wherein, optionally, the housing is seated and coupled onto a fixing frame, a rim cover is coupled to an edge of the fixing frame, a swivel member is inserted into an inner-diameter portion of the rim cover, an edge portion of the swivel member is inserted into the rim cover, a first rail part and a second rail part are respectively positioned above and below the edge portion of the swivel member, the first rail part is rotatably supported by a first ball disposed under the rim cover and above the edge portion of the swivel member, the second rail part is rotatably supported by a second ball positioned on the fixing frame and under the edge portion of the swivel member, and the swivel member is connected to the rotary plate.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application claims priority to and the benefit of Korean Patent Application No. 10-2024-0158247 and 10-2025-0150324 filed in the Korean Intellectual Property Office on November 08, 2024, and October 17, 2025, respectively, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD The present disclosure relates to a power swivel device provided with a manual operation device for a vehicle seat. BACKGROUND In general, vehicle seats may be equipped with various types of convenience devices to provide passengers with comfortable ride quality and convenience. Examples of the convenience devices of the vehicle seats may include a seat track device configured to move a vehicle seat forward or rearward to suit an occupant's body type, a leg rest configured to support a passenger's leg, and a power swivel device configured to rotate the vehicle seat. The seat track device may include a lower rail coupled to a floor panel in a vehicle interior, and an upper rail inserted into the lower rail and configured to move along the lower rail. The power swivel device may be connected to the upper rail. In the power swivel device, power of a motor, such as a brushless direct current motor (BLDC), may be transmitted to a rotary plate through a ring gear that engages with a pinion gear of the motor. Because the rotary plate is connected to a swivel seat, the swivel seat may be rotated by a rotation of the rotary plate. When the swivel seat is rotated by an operation of the power swivel device, a passenger seated in the swivel seat may face another passenger seated in another seat, thereby expanding spatial utilization of a vehicle interior. However, because the power swivel device in the related art is not provided with a separate manual operation device for a vehicle seat, the power swivel device in the related art is not capable of forcibly and manually rotating the vehicle seat in case that the motor for operating the power swivel device is stopped due to an accident or the like. [Document of Related Art] [Patent Document] (Patent Document 1) Korean Patent Application Laid-Open No. 10-2020-0078903 (published on July 2, 2020) SUMMARY The present disclosure has been made in an effort to solve the above-mentioned problem, and an object of the present disclosure is to provide a power swivel device provided with a manual operation device for a vehicle seat, the manual operation device being capable of manually rotating a vehicle seat in a state in which a motor for operating the power swivel device is stopped due to an accident or the like. In order to achieve the above-mentioned object, the present disclosure provides a power swivel device for a vehicle seat, the power swivel device including: a manual operation device configured to allow manual rotation of a vehicle seat connected to a rotary plate by releasing a clutch drum and a brake drum of the power swivel device from a first restrained state or by releasing the brake drum and the rotary plate from a second restrained state when a motor of the power swivel device is stopped. The manual operation device according to the first embodiment of the present disclosure may include: a locking pin having a lower portion configured to penetrate the rotary plate and to be inserted into a locking groove positioned on the brake drum; a support frame spaced apart from the rotary plate at an interval and positioned above the rotary plate, the support frame having an upper surface having an insertion hole into which an upper portion of the locking pin is inserted, the support frame having a seating portion extending from an outer-diameter portion of the support frame, the seating portion being connected to the rotary plate, the support frame being elastically supported by a first spring coupled to the locking pin; and a support member positioned between the support frame and the rotary plate and having a support portion extending from an outer-diameter portion of the support member, the support portion being configured to support the locking pin. In addition, a catching projection may be positioned on an outer-diameter portion of the locking pin, and the first spring may be positioned between the catching projection and the support frame in a state in which the first spring is caught by the catching projection, a first protruding portion positioned on an inner-diameter portion of the support frame and a second protruding portion positioned on the outer-diameter portion of the support member may be connected by a hinge shaft, and the support portion may support the catching projection while surrounding the outer-diameter portion of the locking pin. In addition, when a wire connected to the support member is pulled in an unlocking direction, the second protruding portion may be configured to rotate downward about the hinge shaft, the support portion may be configured to push the catching projection upward, a lower portion o