US20140077554A1 - Seat lifter - Google Patents

Seat lifter Download PDF

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Publication number
US20140077554A1
US20140077554A1 US14/118,755 US201214118755A US2014077554A1 US 20140077554 A1 US20140077554 A1 US 20140077554A1 US 201214118755 A US201214118755 A US 201214118755A US 2014077554 A1 US2014077554 A1 US 2014077554A1
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US
United States
Prior art keywords
link
lower arm
bush
hole
rod
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US14/118,755
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English (en)
Inventor
Hidehiko Fujioka
Toshiharu Ito
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shiroki Corp
Original Assignee
Shiroki Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shiroki Corp filed Critical Shiroki Corp
Assigned to SHIROKI CORPORATION reassignment SHIROKI CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: FUJIOKA, HIDEHIKO, ITO, TOSHIHARU
Publication of US20140077554A1 publication Critical patent/US20140077554A1/en
Abandoned legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C3/00—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats
    • A47C3/20—Chairs or stools with vertically-adjustable seats
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
    • B60N2/04—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable
    • B60N2/06—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable slidable
    • B60N2/067—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable slidable by linear actuators, e.g. linear screw mechanisms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
    • B60N2/04—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable
    • B60N2/06—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable slidable
    • B60N2/07—Slide construction
    • B60N2/0702—Slide construction characterised by its cross-section
    • B60N2/0705—Slide construction characterised by its cross-section omega-shaped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
    • B60N2/04—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable
    • B60N2/16—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable height-adjustable
    • B60N2/1605—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable height-adjustable characterised by the cinematic
    • B60N2/161—Rods
    • B60N2/1615—Parallelogram-like structure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
    • B60N2/04—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable
    • B60N2/16—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable height-adjustable
    • B60N2/1635—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable height-adjustable characterised by the drive mechanism
    • B60N2/165—Gear wheel driven mechanism
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
    • B60N2/04—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable
    • B60N2/16—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable height-adjustable
    • B60N2/18—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable height-adjustable the front or the rear portion of the seat being adjustable, e.g. independently of each other
    • B60N2/1807—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable height-adjustable the front or the rear portion of the seat being adjustable, e.g. independently of each other characterised by the cinematic
    • B60N2/1839—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable height-adjustable the front or the rear portion of the seat being adjustable, e.g. independently of each other characterised by the cinematic pivoting about an axis located in an intermediate position
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
    • B60N2/04—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable
    • B60N2/16—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable height-adjustable
    • B60N2/18—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable height-adjustable the front or the rear portion of the seat being adjustable, e.g. independently of each other
    • B60N2/185—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable height-adjustable the front or the rear portion of the seat being adjustable, e.g. independently of each other characterised by the drive mechanism
    • B60N2/1864—Gear wheel driven mechanism
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/68—Seat frames
    • B60N2/682—Joining means

Definitions

  • the present invention relates to a seat lifter changing height or inclination of a seat cushion using links.
  • a seat lifter changing height or inclination of a seat cushion using links
  • a seat lifter that the movement of a link provided at one side (for example, outer-side) of a width direction of a seat is transmitted, via a rod, to a link provided at the other side (for example, inner side) thereof.
  • connection structure of the rod and the link there is a structure, in which an end surface of the rod contacts the link and the abutment portion therebetween is fixed by welding (for example, see Patent Document 1).
  • the dimension in a width direction of the seat becomes uneven due to variations in dimensional accuracy and assembly accuracy of mechanical parts of the seat, and therefore the end surface of the rod may not be welded to the link.
  • the variations in dimensional accuracy and assembly accuracy of mechanical parts of the seat can be absorbed by a length of the pin, and therefore it is possible to weld the rod and the link.
  • Patent Document 1 JP-A-2002-283900 ( FIG. 2 )
  • Patent Document 2 JP-A-2010-274691 ( FIG. 2 )
  • the present invention has been made to solve the above-described problems, and an object thereof is to provide a seat lifter in which a welded position of a rod is fixed.
  • a seat lifter is a seat lifter that is capable of changing height or inclination of an inner-side lower arm and an outer-side lower arm of a seat cushion.
  • the seat lifter includes a first link member provided at one side of a width direction of a seat, a second link member provided at the other side of the width direction of the seat and a rod having one end attached to the first link member and the other end attached to the second link member.
  • At least one of the link members includes a shaft portion with a hole and is rotatably held on an outer peripheral surface of the shaft portion. The rod is welded in a state of being inserted into the hole of the link member.
  • the link member as used herein is not limited to an elongated rod-like member itself that is generally referred to as a link, but includes a component shape in which other components are fixed to an elongated rod-like member.
  • At least one of the link members includes the shaft portion with the hole and is rotatably held on the outer peripheral surface of the shaft portion and the rod is welded in a state of being inserted into the hole of the link member, the welded position of the rod is fixed. Further, since the rod is inserted into a rod hole, it is possible to absorb the variation in an axial dimension of the rod.
  • FIG. 1 is a perspective view illustrating a main portion of a seat lifter according to an illustrative embodiment.
  • FIG. 2 is a view as seen from a direction of an arrow II in FIG. 1 .
  • FIG. 3 is a sectional view taken along a cutting line in FIG. 2 .
  • FIG. 4 is a sectional view taken along a cutting line IV-IV in FIG. 2 .
  • FIG. 5 is a view explaining the inventive portion of a second embodiment, corresponding to FIG. 3 of the first embodiment.
  • FIG. 6 is a view explaining the inventive portion of the second embodiment, corresponding to FIG. 4 of the first embodiment.
  • FIG. 7 is a view explaining a bush of a third embodiment.
  • FIG. 1 is a perspective view illustrating a main portion of a seat lifter according to the first embodiment
  • FIG. 2 is a view as seen from a direction (outer-side) of an arrow II in FIG. 1
  • FIG. 3 is a sectional view taken along a cutting line in FIG. 2
  • FIG. 4 is a sectional view taken along a cutting line IV-IV in FIG. 2 .
  • an outer-side seat track 1 includes a lower rail 7 provided to a floor viabrackets 3 , 5 and an upper rail 9 that is engaged with the lower rail 7 to be movable relative to the lower rail 7 .
  • a pair of (outer-side and inner-side) seat tracks 1 is provided to the floor.
  • the seat track shown in FIG. 2 is an outer-side seat track.
  • an inner-side seat track 101 includes a lower rail 107 and an upper rail 109 that is engaged with the lower rail 107 to be movable relative to the lower rail 107 .
  • a front bracket 10 is provided at a front-side upper portion of the upper rail 9
  • a rear bracket 11 is provided at a rear-side upper portion thereof.
  • One end side of a front link 15 is rotatably attached to the front bracket 10 by using a pin 13 .
  • One end side of a rear link 19 is rotatably attached to the rear bracket 11 by using a pin 17 .
  • the other end side of the front link 15 is rotatably attached to a front portion of an outer-side lower arm 23 of the seat cushion by using a pin 21 .
  • the other end side of the rear link 19 is rotatably attached to a rear portion of the lower arm 23 of the seat cushion by a mounting structure as described below.
  • a four-bar linkage rotation mechanism is configured by the upper rail 9 , the front link 15 , the lower arm 23 and the rear link 19 .
  • an inner-side lower arm 123 (see FIG. 1 ) of the seat cushion is also provided to the inner-side seat track 101 via a front link (see FIG. 4 ) and a rear link 119 (see FIG. 1 ), and a four-bar linkage rotation mechanism is configured by the inner-side upper rail 109 , the front link, the lower arm 123 and the rear link 119 .
  • the outer-side rear link 19 is formed with a sector gear 19 a centered about a rotation center of a side of the lower arm 23 .
  • the lower arm 23 is provided with a pinion 27 that is screwed to the sector gear 19 a.
  • the pinion 27 is rotationally driven by a motor (not shown) provided in the lower arm 23 .
  • the rear link 19 is formed with a through-hole 19 b centered about a rotation center thereof. Additionally, the lower arm 23 is formed with a hole 23 a that has a diameter slightly greater than that of the through-hole 19 b of the rear link 19 .
  • a bush 31 is attached to the through-hole 19 b of the rear link 19 and is configured by a cylindrical portion (shaft portion) 31 a and a collar portion 31 b.
  • the cylindrical portion 31 a is inserted into the through-hole 19 b and both ends thereof are formed as an open face.
  • the collar portion 31 b is formed at an outer peripheral surface of the cylindrical portion 31 a and welded to an edge of the through-hole 19 b of the rear link 19 .
  • an outer peripheral surface of the protruding part protruded from the through-hole 19 b of the rear link 19 is fitted to the hole 23 a of the lower arm 23 , and therefore the rear link 19 is rotatably held.
  • a rod 53 is inserted into a through-hole of the bush 31 and an outer peripheral surface of the rod 53 and the collar portion 31 b (link member) of the bush 31 are welded to each other.
  • an outer peripheral surface of the protruding part protruded from the hole 23 a of the lower arm 23 is mounted with a push nut 55 that can contact an outer surface of the lower arm 23 .
  • a bush 57 made of a low-friction material is disposed between an inner peripheral surface of the hole 23 a of the lower arm 23 and an outer peripheral surface of the bush 31 .
  • the rear link 119 is formed integrally with a cylindrical portion (shaft portion) 119 b by a burring operation.
  • the lower arm 123 is formed with a hole 123 a that has a diameter slightly greater than that of the cylindrical portion 119 b of the rear link 119 .
  • the cylindrical portion 119 b of the rear link 119 is inserted into the hole 123 a of the lower arm 123 , and therefore the rear link 119 is rotatably held.
  • the other end side of the rod 53 is inserted into a through-hole of the cylindrical portion 119 b of the rear link 119 , and an outer peripheral surface of the rod 53 and the rear link 119 are welded to each other.
  • an outer peripheral surface of the protruding part protruded from the hole 123 a of the lower arm 123 is mounted with a push nut 155 that can contact an outer surface of the lower arm 123 .
  • a bush 157 made of a low-friction material is disposed between an inner peripheral surface of the hole 123 a of the lower arm 123 and an outer peripheral surface of the cylindrical portion 119 b of the rear link 119 .
  • a tilt pan 51 is disposed at the front-side upper portions of the lower arm 23 and the lower arm 123 such that the tilt pan 51 bridges the lower arm 23 and the lower arm 123 .
  • a base portion of the tilt pan 51 is rotatably attached to the lower arm 23 by using a pin 52 and rotatably attached to the lower arm 123 by using a pin (not shown).
  • arm portions 51 a, 51 b are provided at an intermediate portion of the tilt pan 51 with extending toward the seat tracks 1 , 101 .
  • a tilt link 61 is rotatably attached to a front portion of the lower arm 23 .
  • One rotation end side of the tilt link 61 is formed with a sector gear 61 a centered about a rotation center thereof.
  • the lower arm 23 is provided with a pinion 63 that is screwed to the sector gear 61 a.
  • the pinion 63 is rotationally driven by a motor (not shown) provided in the lower arm 23 .
  • a pin 65 which is fitted to the arm portion 51 a of the tilt pan 51 , is provided in the other rotation end side of the tilt link 61 .
  • a tilt link 161 is rotatably attached to a front portion of the lower arm 123 .
  • a pin (not shown), which is fitted to the arm portion 51 b of the tilt pan 51 , is provided in the other rotation end side of the tilt link 161 .
  • a mechanism for absorbing the difference between the rotation trajectory of the tilt links and the rotation trajectory of the tilt pan is provided to the tilt pan 51 , the tilt link 61 and the tilt link 161 .
  • the tilt link 61 is formed with a through-hole 61 b centered about a rotation center thereof. Further, the lower arm 23 is formed with a hole 23 c that has a diameter slightly greater than that of the through-hole 61 b of the tilt link 61 .
  • a bush 67 is attached to the through-hole 61 b of the tilt link 61 and is configured by a cylindrical portion (shaft portion) 67 a and a collar portion 67 b.
  • the cylindrical portion 67 a is inserted into the through-hole 61 b and both ends thereof are formed as an open face.
  • the collar portion 67 b is formed at an outer peripheral surface of the cylindrical portion 67 a and welded to an edge of the through-hole 61 b of the tilt link 61 .
  • an outer peripheral surface of the protruding part protruded from the hole 23 c of the lower arm 23 is mounted with a push nut 68 that can contact an outer surface of the lower arm 23 .
  • a bush 71 made of a low-friction material is disposed between an inner peripheral surface of the hole 23 c of the lower arm 23 and an outer peripheral surface of the bush 67 .
  • the tilt link 161 is formed integrally with a cylindrical portion 161 b by a burring operation.
  • the lower arm 123 is formed with a hole 123 c that has a diameter slightly greater than that of the cylindrical portion 161 b of the tilt link 161 .
  • the cylindrical portion 161 b of the tilt link 161 is inserted into the hole 123 c of the lower arm 123 , and therefore the tilt link 161 is rotatably held.
  • the other end side of the rod 69 is inserted into a through-hole of the cylindrical portion 161 b of the tilt link 161 , and an outer peripheral surface of the rod 69 and the tilt link 161 are welded to each other.
  • an outer peripheral surface of the protruding part protruded from the hole 123 c of the lower arm 123 is mounted with a push nut 168 that can contact an outer surface of the lower arm 123 .
  • a bush 171 made of a low-friction material is disposed between an inner peripheral surface of the hole 123 c of the lower arm 123 and an outer peripheral surface of the cylindrical portion 161 b of the tilt link 161 .
  • the rotation of the tilt link 61 is transmitted to the tilt link 161 via the rod 69 . Consequently, as the pinion 63 is rotated and the tilt link 61 is rotated, the tilt link 161 is also rotated via the rod 69 . Therefore, a rotation end side of the tilt pan 51 is raised and lowered about the pin 52 of the lower arm 23 side, and a pin (not shown) of the lower arm 123 side, so that a front portion of the seat cushion is inclined.
  • the rod 53 and the rod 69 are inserted into the through-holes of the cylindrical portions (shaft portions) of the link member. Since the outer peripheral surfaces of the rod 53 and the rod 69 and the link member are welded to each other, so that the welded positions of the rod 53 and the rod 69 are fixed.
  • the rod 53 and the rod 69 are inserted into the through-holes of the cylindrical portions of the link member, it is possible to absorb the variation in an axial dimension of the rod 53 and the rod 69 .
  • the tilt link 161 is formed integrally with the cylindrical portion 161 b, it is possible to reduce the number of parts and it is possible to stably hold the tilt link 161 and the rod 69 .
  • the rear link 19 having the sector gear 19 a formed thereon and the tilt link 61 having the sector gear 61 a formed thereon are subjected to a process of increasing the hardness by quenching.
  • a peripheral surface of the shaft portion is hardened, and therefore an inner peripheral side of the push nut does not bite into the shaft portion. Consequently, the push nut does not perform a push nut function.
  • the cylindrical portion 31 a and the cylindrical portion 67 a that are not hardened can be formed in the rear link 19 and the tilt link 161 .
  • the present invention is not limited to the above-described embodiments.
  • the bush 31 and the bush 67 respectively include the collar portion 31 b and the collar portion 67 b in the above-described embodiment, the collar portion 31 b and the collar portion 67 b may be omitted.
  • both of the links may be a link that includes a bush having a cylindrical portion formed therein without forming the cylindrical portions integrally in the links.
  • the link is rotationally driven by rotationally driving a pinion that is meshed with the sector gear formed on the link.
  • the seat lifter may include a fixing nut member, which is only allowed to rotate and a threaded bar, which is screwed to the fixing nut member and has an end portion rotatably attached to the link. Therefore, the link may be rotated by rotating the fixing nut member to advance and retreat the threaded bar.
  • the holes into which the rod 53 and the rod 69 are inserted are through-holes in the above-described embodiment, the holes may be blind holes having a sufficient depth.
  • FIG. 5 is a view explaining the inventive portion of the second embodiment, and it is corresponding to FIG. 3 of the first embodiment.
  • FIG. 6 is a view explaining the inventive portion of the second embodiment, and it is corresponding to FIG. 4 of the first embodiment.
  • the present embodiment is the same as the first embodiment except for the shape of the bush. Accordingly, the same or similar element will be denoted by the same reference numeral as that of the first embodiment and a duplicated description thereof will be omitted.
  • a bush 231 is attached to the through-hole 19 b of the rear link 19 and is configured by a cylindrical portion (shaft portion) 231 a and a collar portion 231 b.
  • the cylindrical portion 231 a is inserted into the through-hole 19 b and both ends thereof are formed as an open face.
  • the collar portion 231 b is formed at an outer peripheral surface of the cylindrical portion 231 a.
  • the cylindrical portion 231 a at one side portion of the collar portion 231 b is inserted into the hole 19 b of the rear link 19 and the one side portion of the collar portion 231 b is welded to an edge of the through-hole 19 b of the rear link 19 .
  • the cylindrical portion 231 a at the other side portion of the collar portion 231 b is inserted through the hole 23 a of the lower arm 23 .
  • An outer peripheral surface of the part of the cylindrical portion 231 a protruded from the hole 23 a of the lower arm 23 is mounted with the push nut 55 that can contact an outer surface of the lower arm 23 . Accordingly, since the lower arm 23 is sandwiched between the push nut 55 and the collar portion 231 b of the bush 231 , an axial movement of the bush 231 is restricted and the other side portion of the collar portion 231 b and a peripheral part of the hole 23 a of the lower arm 23 are in sliding contact with each other. Additionally, in the present embodiment, the bush 57 made of a low-friction material is disposed between an inner peripheral surface of the hole 23 a of the lower arm 23 and an outer peripheral surface of the bush 31 .
  • a bush 267 is attached to the through-hole 61 b of the tilt link 61 and is configured by a cylindrical portion (shaft portion) 267 a and a collar portion 267 b.
  • the cylindrical portion 267 a is inserted into the through-hole 61 b and both ends thereof are formed as an open face.
  • the collar portion 267 b is formed at an outer peripheral surface of the cylindrical portion 267 a.
  • the cylindrical portion 267 a at one side portion of the collar portion 267 b is inserted into the hole 61 b of the tilt link 61 , and the one side portion of the collar portion 267 b is welded to an edge of the through-hole 61 b of the tilt link 61 .
  • the cylindrical portion 267 a at the other side portion of the collar portion 267 b is inserted through the hole 23 c of the lower arm 23 .
  • An outer peripheral surface of the part of the cylindrical portion 267 a protruded from the hole 23 c of the lower arm 23 is mounted with the push nut 68 that can contact an outer surface of the lower arm 23 . Accordingly, since the lower arm 23 is sandwiched between the push nut 68 and the collar portion 267 b of the bush 267 , an axial movement of the bush 267 is restricted and the other side portion of the collar portion 267 b and a peripheral part of the hole 23 c of the lower arm 23 are in sliding contact with each other. Additionally, in the present embodiment, the bush 71 made of a low-friction material is disposed between an inner peripheral surface of the hole 23 c of the lower arm 23 and an outer peripheral surface of the bush 31 .
  • the holes into which the rod 53 and the rod 69 are inserted are through holes in the above-described embodiment, the holes may be blind holes having a sufficient depth.
  • FIG. 7 is a view explaining a bush of the third embodiment.
  • the present embodiment is the same as the first and second embodiments except for the shape of the bush. Accordingly, the same or similar element will be denoted by the same reference numeral as that of the first and second embodiments and a duplicated description thereof will be omitted.
  • a bush 331 includes a cylindrical portion (shaft portion) 331 a whose both ends are formed as an open face, and a collar portion 331 b formed at an outer peripheral surface of the cylindrical portion 331 a. Furthermore, the cylindrical portion 331 a includes a large-diameter section 331 c formed at one side with respect to the collar portion 331 b and a small-diameter section 331 d formed at the other side, which has a diameter smaller than the large-diameter section 331 c.
  • the large-diameter section 331 c of the cylindrical portion 331 a of the bush 331 is inserted into the through-hole 19 b of the rear link 19 . Then, one side portion (side portion on the large-diameter section 331 c side) of the collar portion 331 b is welded to an edge of the through-hole 19 b of the rear link 19 .
  • the small-diameter section 331 d of the cylindrical portion 331 a of the bush 331 is inserted through the hole 23 a of the lower arm 23 .
  • An outer peripheral surface of the part of the small-diameter portion 31 d protruded from the hole 23 a of the lower arm 23 is mounted with the push nut 55 that can contact an outer surface of the lower arm 23 . Accordingly, since the lower arm 23 is sandwiched between the push nut 55 and the collar portion 331 b of the bush 331 , an axial movement of the bush 231 is restricted, and the other side portion of the collar portion 231 b and a peripheral part of the hole 23 c of the lower arm 23 are in sliding contact with each other.
  • FIG. 7 is described with reference to the rear link 19 , the same configurations may be applied to the tilt link 61 .
  • the part of the cylindrical portion 331 a of the bush 331 that is rotatably held in the lower arm 23 is formed as the small-diameter section 331 d, it is possible to reduce the hole 23 a of the lower arm 23 . Therefore, it is possible to achieve the miniaturization and strength-up of the lower arm 23 .
  • the holes into which the rod 53 and the rod 69 are inserted are through-holes in the above-described embodiment, the holes may be blind holes having a sufficient depth.
US14/118,755 2011-05-19 2012-05-16 Seat lifter Abandoned US20140077554A1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
JP2011-112048 2011-05-19
JP2011112048 2011-05-19
JP2012016518A JP2012254777A (ja) 2011-05-19 2012-01-30 シートリフタ
JP2012-016518 2012-01-30
PCT/JP2012/062523 WO2012157678A1 (ja) 2011-05-19 2012-05-16 シートリフタ

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US20140077554A1 true US20140077554A1 (en) 2014-03-20

Family

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Application Number Title Priority Date Filing Date
US14/118,755 Abandoned US20140077554A1 (en) 2011-05-19 2012-05-16 Seat lifter

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US (1) US20140077554A1 (ja)
EP (1) EP2711240A4 (ja)
JP (1) JP2012254777A (ja)
CN (1) CN103562004A (ja)
WO (1) WO2012157678A1 (ja)

Cited By (5)

* Cited by examiner, † Cited by third party
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US20160114703A1 (en) * 2013-06-16 2016-04-28 Delta Tooling Co., Ltd. Power seat slide device and vehicle seat
US20160114893A1 (en) * 2014-10-23 2016-04-28 Gulfstream Aerospace Corporation Aircraft door with compressible header
US10556528B2 (en) * 2017-10-24 2020-02-11 Toyota Boshoku Kabushiki Kaisha Cushion frame
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US11214179B2 (en) * 2019-06-26 2022-01-04 Ford Global Technologies, Llc Pivoting seat assembly

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EP2711240A4 (en) 2015-03-11
JP2012254777A (ja) 2012-12-27

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