WO2023202208A1 - 一种座椅腿托延伸驱动机构 - Google Patents

一种座椅腿托延伸驱动机构 Download PDF

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Publication number
WO2023202208A1
WO2023202208A1 PCT/CN2023/077558 CN2023077558W WO2023202208A1 WO 2023202208 A1 WO2023202208 A1 WO 2023202208A1 CN 2023077558 W CN2023077558 W CN 2023077558W WO 2023202208 A1 WO2023202208 A1 WO 2023202208A1
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WO
WIPO (PCT)
Prior art keywords
extension
flipping
link
support
leg rest
Prior art date
Application number
PCT/CN2023/077558
Other languages
English (en)
French (fr)
Inventor
黄亚伟
龙勇
徐杰
宋海红
陈纪萍
Original Assignee
延锋国际汽车技术有限公司
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 延锋国际汽车技术有限公司 filed Critical 延锋国际汽车技术有限公司
Publication of WO2023202208A1 publication Critical patent/WO2023202208A1/zh

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Classifications

    • 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
    • B60N2/90—Details or parts not otherwise provided for
    • B60N2/995—Lower-leg-rests, e.g. calf-rests

Definitions

  • the invention relates to the technical field of seats, and in particular to a seat leg rest extension driving mechanism.
  • the position of the heel point determines that the seat cushion height should not be too high and should be close to the length of the calf.
  • the support length of the leg rest should be close to the height of the seat cushion.
  • the legrests can only support the thighs when raised, but the calf section has no support, resulting in insufficient comfort.
  • the extension leg rests currently on the market generally use screw rod direct push methods.
  • the arrangement of the stroke end needs to provide a larger space to realize the functions of the entire mechanism.
  • the combination of the long screw rod and the slide rail affects the stability and structural strength of the entire extension mechanism.
  • the motor screw rod stroke is too long, which lengthens the full travel time and affects the passenger experience.
  • Chinese invention patent publication number CN101580034A discloses a car seat leg rest mechanism, which includes a leg rest mechanism including a flip mechanism, a support mechanism, and a transmission mechanism.
  • This patent realizes the stretching function through the transmission structure and is controlled by the flip mechanism.
  • the flip angle satisfies the comfort of the occupants, but this patent has the following shortcomings:
  • This patent has 9 riveting points and requires high connecting rod clearance and torque control.
  • the driving force is located at the rear of the leg rest. The longer the extension length, the greater the motor load, which affects the extension speed.
  • the driving force is rear-mounted, and the stability of the whole stroke is relatively poor.
  • the purpose of the present invention is to provide a seat leg rest extension driving mechanism to solve the above problems and defects in the prior art.
  • a seat leg rest extension driving mechanism includes a leg rest mechanism arranged on a seat frame.
  • the leg rest mechanism is driven by an extension mechanism to perform reciprocating motion;
  • the extension mechanism at least includes a first rhombus extension component and a second A diamond-shaped extension part and an extension driving mechanism, wherein the first end of the first diamond-shaped extension part is hinged with the leg support mechanism, the second end of the first diamond-shaped extension part is hinged with the first end of the second diamond-shaped extension part, the The second end of the second rhombus-shaped extension component is hingedly connected to the seat frame, the fixed end of the extension drive mechanism is connected to the seat frame, and the driving end of the extension drive mechanism is hingedly connected to the first rhombus-shaped extension component.
  • the extension mechanism is installed inside the leg rest mechanism.
  • the driving end of the extension driving mechanism is hinged at a hinge point between the second end of the first rhombus extension component and the first end of the second rhombus extension component.
  • the direction of the driving force applied by the extension drive mechanism to the first rhombus extension part and the second rhombus extension part is the same as the extension direction of the leg support mechanism.
  • the first diamond-shaped extension part includes a first fixed block, a first connecting rod, a second connecting rod, a third connecting rod and a fourth connecting rod
  • the first fixed block constitutes The first end of the first diamond-shaped extension part, one end of the first connecting rod and the second connecting rod are hingedly connected with the first fixed block, and one end of the third connecting rod is connected with the first connecting rod
  • the other end of the fourth link is hinged, and one end of the fourth link is hinged with the other end of the second link
  • the second rhombus extension component includes a second a fixed block, a fifth connecting rod, a sixth connecting rod, a seventh connecting rod and an eighth connecting rod
  • the second fixed block constitutes the second end of the second rhombus extending part
  • One end of the six connecting rods is hinged with the second fixed block, one end of the seventh connecting rod is hinged with the other end of the fifth connecting rod, and one end of the eighth connecting rod is hinged with the sixth
  • the other end of the third link, the other end of the fourth link, the other end of the seventh link, and the other end of the eighth link are hinged together;
  • the driving end of the extension drive mechanism is hinged at the hinge point of the other end of the third link, the other end of the fourth link, the other end of the seventh link, and the other end of the eighth link. superior.
  • the third connecting rod and the eighth connecting rod are connected as one body to form a first integral connecting rod
  • the fourth connecting rod and the seventh connecting rod are connected as one body to form a first integral connecting rod.
  • a second integral connecting rod; the first integral connecting rod and the second integral connecting rod are hingedly connected through a connecting column.
  • first connecting rod, the second connecting rod, the fifth connecting rod, the sixth connecting rod, the first integral connecting rod and the second integral connecting rod are all diamond-shaped.
  • reinforcing ribs are provided on the first, second, fifth, and sixth connecting rods.
  • the extension drive mechanism includes an extension motor and an extension screw driven by the extension motor to perform linear motion.
  • One end of the extension screw serves as the fixed end of the extension drive mechanism, so The other end of the extension screw serves as the driving end of the extension driving mechanism and is hingedly connected to the connecting column.
  • the leg rest mechanism includes an inner support cover hinged with the seat frame and a leg rest plate slidably disposed on the inner support cover, and the second diamond-shaped The second end of the extension component and the fixed end of the extension drive mechanism are both fixedly connected to the support inner cover, and the first end of the first rhombus extension component is hingedly connected to the leg support plate.
  • the leg support mechanism further includes a cover, which is fixed on the support inner cover and surrounds the extension mechanism when the leg support mechanism is in use. At the same time, when the leg support mechanism is not in use, the leg support plate can be retracted between the cover and the extension mechanism and be surrounded by the cover.
  • the inner support cover is provided with multi-section slide rails that cooperate with the leg support plates.
  • a positioning groove and a waist-shaped groove are provided on the supporting inner cover, and the second end of the second rhombus-shaped extension part and the fixed end of the extension driving mechanism are fixed on In the positioning groove, the first end of the first rhombus-shaped extension component is hinged to the leg support plate through the waist-shaped hole.
  • the cross section of the inner support cover is similar to a "ji"-shaped structure, which has an upper support transverse plate and is integrated with the left and right sides of the upper support transverse plate.
  • a mounting slot is provided on the board, and the extension mechanism is configured in the mounting slot; the positioning slot and the waist-shaped slot are configured in the mounting slot;
  • the cross-section of the leg support plate is roughly " ⁇ ""shaped, has an upper leg support and a left leg support and a right leg support that are integrated with the left and right sides of the upper leg support and extend downward;
  • the multi-section slide rail is divided into two groups, respectively It is a left side slide rail assembly and a right side slide rail assembly.
  • the left side slide rail assembly is installed between the left support vertical plate and the left leg support plate.
  • the fixed part of the left side slide rail assembly is connected to the left side slide rail assembly.
  • the left support vertical plate is fixedly connected, and the sliding part of the left slide rail assembly is fixedly connected to the left and left leg support plates;
  • the right slide rail assembly is installed between the right support vertical plate and the right Between the leg support plates, the fixed part of the right slide rail assembly is fixedly connected to the right supporting vertical plate, and the sliding part of the right slide rail assembly is fixedly connected to the right and left leg support plates;
  • the cross section of the cover is roughly in the shape of a "mouth" with an open bottom, and has an upper cover plate and is integrated with the left and right sides of the upper cover plate and extends downward.
  • the left cover plate, the right cover plate and the left lower cover plate and the lower right cover plate are respectively integrated with the bottoms of the left cover plate and the right cover plate;
  • the upper cover plate is surrounded by the periphery of the upper support horizontal plate , to block the extension mechanism;
  • the left cover is surrounded by the periphery of the left support vertical plate, the right cover is surrounded by the periphery of the right and left support vertical plates, and the left lower cover is surrounded by the The periphery of the lower left support transverse plate, the lower right cover plate is surrounded by the periphery of the lower right support transverse plate, when the leg rest mechanism is in use, the left cover plate, the left lower cover plate and the right cover plate,
  • the lower right cover covers the fixed part of the left slide rail assembly and the fixed part of the
  • the support inner cover is installed on the seat frame through a flip mechanism.
  • the flip mechanism is located below the support inner cover and is covered by the leg support plate when the leg support mechanism is not in use. Covered by said cover.
  • the flipping mechanism includes a connecting component connected to the seat frame, a flipping component and a flipping drive mechanism, and the flipping component hinges the supporting inner cover on the connecting component. , the flip driving mechanism drives the supporting inner cover to flip.
  • the connecting component includes a pair of connecting frames fixed on the left and right sides of the seat frame;
  • the flipping component includes a pair of connecting rods, a pair of first flipping components and a pair of first flipping components.
  • the pair of connecting rods are connected to the left and right sides of the supporting inner cover, one end of the pair of first flipping parts and the pair of second flipping parts are respectively fixed and hinged with a pair of connecting frames, and a pair of The other ends of the first flipping component and the pair of second flipping components are respectively hinged with a pair of connecting rods;
  • the fixed end of the flipping driving mechanism is installed on a connecting frame, and the driving end of the flipping driving mechanism is connected to a pair of first flipping parts.
  • the flip parts are hinged.
  • each first flip component includes a first flip link and A second flipping link, one end of the first flipping link is hinged to the connecting frame on the corresponding side, the other end of the first flipping link is hinged to one end of the second flipping link, the second flipping link
  • the other end of the connecting rod is hinged with the connecting rod on the corresponding side
  • each second flipping component includes a third flipping link and a second flipping link, and one end of the third flipping link is hinged with the connecting frame on the corresponding side, so The other end of the third flip link is hinged to one end of the fourth flip link, and the other end of the fourth flip link is hinged to the connecting rod on the corresponding side;
  • the driving end of the flip drive mechanism is the same as the drive end of the flip drive mechanism.
  • the hinge point between the other end of the first flip link and one end of the second flip link is hinged; in addition, the first flip link in each first flip component is connected to the fourth flip link of the corresponding second flip component.
  • the flipping drive mechanism includes a flipping motor, a flipping screw driven by the flipping motor, a flipping swing arm and a flipping synchronization rod, and the flipping motor serves as the flipping drive mechanism.
  • the fixed end is fixed on a connecting frame
  • one end of the flipping screw rod serves as the driving end of the flipping drive mechanism and is hinged with one end of the flipping swing arm
  • the other end of the flipping swing arm is fixed on the flipping synchronization rod.
  • both ends of the flipping synchronization rod are respectively fixedly connected to the first flipping link in the pair of first flipping parts.
  • the present invention has the following beneficial effects:
  • the driving force of the extension mechanism is located in the middle of the extension mechanism and is consistent with the direction of movement.
  • the motor load changes very little throughout the entire stroke, the speed is consistent, and the actual operating speed is 2.5 times that of the motor.
  • the driving force of the extension mechanism is located in the middle of the extension mechanism and is close to the leg rest mechanism, making the leg rest mechanism run smoothly throughout the entire stroke.
  • leg rest mechanism 5. Adding another cover to the entire leg rest mechanism can cover the slide rails in the leg rest mechanism whether it is in use or not, improving the overall leg rest mechanism. Beautiful appearance effect.
  • Figure 1 is a schematic diagram of the open state of the present invention (with the cover and seat frame removed).
  • Figure 2 is an exploded view of Figure 1 (with the cover and seat frame removed).
  • Figure 3 is one of the exploded views of the present invention in the open state (with the cover, seat frame and supporting inner cover removed).
  • Figure 4 is the second exploded view of the present invention in the open state (with the cover, seat frame and supporting inner cover removed).
  • Figure 5 is the third exploded view of the present invention in the open state (with the cover and seat frame removed).
  • Figure 6 is the fourth exploded view of the present invention in the open state (with the cover and seat frame removed).
  • Figure 7 is a schematic diagram of the closed state of the present invention (with the cover and seat frame removed).
  • Figure 8 is an exploded view of Figure 7 (with the cover and seat frame removed).
  • Figure 9 is a schematic diagram of the extension mechanism of the present invention installed in a closed state at the front end (with the cover and seat frame removed).
  • Figure 10 is a schematic diagram of the extension mechanism of the present invention installed at the front end (with the cover, seat frame and flip mechanism removed).
  • Figure 11 is a schematic diagram of the extension mechanism of the present invention installed at the rear end (with the cover, seat frame and flip mechanism removed).
  • Figure 12 is a schematic diagram of the extended mechanism of the present invention in its closed state (with the cover, seat frame and flip mechanism removed).
  • Figure 13 is a schematic diagram of the installation of the extension mechanism and the supporting inner cover of the present invention.
  • FIG. 14 is an exploded view of the installation of FIG. 13 .
  • Figure 15 is a schematic diagram of the initial state of the present invention (with the cover and seat frame removed).
  • Figure 16 is a schematic diagram of the extending process state of the present invention (with the cover and seat frame removed).
  • Figure 17 is a schematic diagram of the fully extended state of the present invention (with the cover and seat frame removed).
  • Figure 18 is a schematic diagram of the cover of the present invention.
  • Figure 19 is a schematic diagram of the extending process state of the present invention (with the seat frame removed).
  • Figure 20 is a simplified schematic diagram of the internal structure of the present invention (with the seat frame removed).
  • a seat leg rest extension driving mechanism which includes a leg rest mechanism 200 , a flip mechanism 100 , and an extension mechanism 300 .
  • the flip mechanism 100 connects the leg rest mechanism 200 to the seat frame (not shown in the figure), and the extension mechanism 300 is slidably disposed on the leg rest mechanism 200 and drives the leg rest mechanism 200 to perform reciprocating motion.
  • the flipping mechanism 100 includes a connecting component connected to the seat frame (not shown in the figure), a flipping component, and a flipping driving mechanism.
  • the connecting component includes a pair of connecting brackets 110a and 110b fixed on the left and right sides of the seat frame (not shown in the figure).
  • the flipping part includes a pair of connecting rods 140a, 140b, a pair of first flipping parts 120a, 120b and a pair of second flipping parts 130a, 130b.
  • One ends of a pair of first flipping parts 120a, 120b and a pair of second flipping parts 130a, 130b are respectively fixed and hinged with a pair of connecting frames 110a, 110b.
  • the other ends of 130b are respectively hinged with a pair of connecting rods 140a, 140b, specifically:
  • Each first flip part 120a, 120b includes a first flip link 121a, 121b and a second flip link.
  • Rotating links 122a, 122b, one end of a pair of first flipping links 121a, 121b is hingedly connected to the connecting frame 110a, 110b on the corresponding side, and the other end of a pair of first flipping links 121a, 121b is connected to a pair of second flipping links 121a, 121b.
  • One end of the rods 122a and 122b is hinged, and the other end of the second flip link 122a and 122b is hinged with the connecting rods 140a and 140b on the corresponding side.
  • Each second flipping part 130a, 130b includes a third flipping link 131a, 131b and a second flipping link 132a, 132b.
  • One end of the third flipping link 131a, 131b is hingedly connected to the connecting frame 110a, 110b on the corresponding side.
  • the other ends of the three flipping links 131a and 131b are hinged to one end of the fourth flipping links 132a and 132b, and the other ends of the fourth flipping links 132a and 132b are hinged to the connecting rods 140a and 140b on the corresponding side.
  • first flipping links 121a and 121b are hingedly connected to the fourth flipping links 132a and 132b.
  • the flip driving mechanism includes a flip motor 150, a flip screw 160 driven by the flip motor 150, a flip swing arm 170 and a flip synchronization rod 180.
  • the flip motor 150 serves as the fixed end of the flip drive mechanism and is fixed on the connecting frame 110b.
  • the flip screw One end of 150 serves as the driving end of the flip driving mechanism and is hingedly connected to one end of the flip swing arm 170.
  • the other end of the flip swing arm 170 is fixed on the flip synchronization rod 180.
  • the leg rest mechanism 200 includes an inner supporting cover 210 hinged with the seat frame (in the figure), a leg rest 220, a cover 230 and a plurality of multi-section slide rails.
  • the flipping component hinges the supporting inner cover 210 to the connecting frames 110a and 110b, and the flipping driving mechanism drives the supporting inner cover 210 to flip.
  • the flipping mechanism 100 is located below the supporting inner cover 210 and is covered by the leg rest 220 when the leg rest mechanism 200 is not in use.
  • the cross section of the supporting inner cover 210 is similar to a "ji"-shaped structure. It has an upper supporting horizontal plate 211 and a left supporting vertical plate 213a and a right supporting plate that are integrated with the left and right sides of the upper supporting horizontal plate 211 and extend downward.
  • the vertical plate 213b and the left lower supporting horizontal plate 214a and the lower right supporting horizontal plate 214b are integrated with the bottoms of the left supporting vertical plate 213a and the right supporting vertical plate 213b respectively;
  • a mounting groove 211a is provided on the upper supporting horizontal plate 211, and
  • the mounting groove 211a is provided with a positioning groove 211aa and a waist-shaped groove 211ab.
  • the leg support 220 has a roughly " ⁇ "-shaped cross section and has an upper leg support 221 and an upper leg support 221.
  • the left and right sides of the leg support 221 are integrated into a left leg support 222a and a right leg support 222b extending downward.
  • the multi-section slide rail is divided into two groups, namely the left slide rail assembly 240a and the right slide rail assembly 240b.
  • the left slide rail assembly 240a is installed between the left support vertical plate 213a and the left leg support plate 222a.
  • the fixed part 241a of the left slide rail assembly 240a is fixedly connected to the left support vertical plate 213a.
  • the sliding part 242a is fixedly connected to the left leg support 222a.
  • the right slide rail assembly 240b is installed between the right support vertical plate 213b and the right leg support plate 222b.
  • the fixed part 241b of the right slide rail assembly 240b is fixedly connected to the right support vertical plate 213b.
  • the sliding part 242b is fixedly connected to the right leg support 222b.
  • the support inner cover 210 is retracted into the leg support plate 220 through the extension mechanism 300, and the left lower support horizontal plate 214a, the left support vertical plate 213a and the left leg support plate 222a secure the left slide rail assembly 240a covers the right lower support horizontal plate 214b, the right support vertical plate 213b and the right leg support plate 222b cover the right slide rail assembly 240b.
  • the cross section of the cover 230 is roughly in the shape of a "mouth" with an open bottom, and has an upper cover 231 and a left cover 232a, a right cover 232a, and a right cover 232a that are integrated with the left and right sides of the upper cover 231 and extend downward.
  • the cover 232b and the lower left cover 233a and the lower right cover 233b are integrally connected with the bottoms of the left cover 232a and the right cover 232b respectively.
  • the upper cover 231 surrounds the periphery of the upper support horizontal plate 211 and blocks the extension mechanism 300 disposed in the installation slot 211a; the left cover 232a surrounds the left support vertical plate 213a, and the right cover 232b surrounds the right and left supports.
  • the left lower cover 233a surrounds the periphery of the left lower support transverse plate 214a and is fixedly connected by two screws 234a;
  • the right lower cover 233b surrounds the periphery of the right lower support transverse plate 213a and is fixedly connected by two screws 234b; in the leg rest mechanism
  • the left cover 232a, the lower left cover 233a and the right cover 232b, 233b respectively cover the fixed part 241a of the left slide rail assembly 240a and the fixed part 241b of the right slide rail assembly 240b.
  • leg rest mechanism 200 adding another cover 230 to the entire leg rest mechanism 200 can make the leg rest mechanism 200 Regardless of whether it is in use or not in use, the slide rails in the leg rest mechanism 200 can be covered, thereby improving the aesthetic appearance of the entire leg rest mechanism.
  • the extension mechanism 300 is installed inside the leg support mechanism 200, especially in the installation groove 211a supporting the inner cover 210.
  • the extension mechanism 300 includes a first diamond-shaped extension part 310 and a second diamond-shaped extension part 320 and an extension drive mechanism 330.
  • the first end of the first diamond-shaped extension part 310 is hingedly connected with the leg support plate 220 in the leg support mechanism 200.
  • the second end of the extension part 310 is hinged to the first end of the second rhombus extension part 320, and the second end of the second rhombus extension part 320 is hinged to the supporting inner cover 210, and then through the supporting inner cover 210, the flipping mechanism 100 and Seat frame articulated.
  • the fixed end of the extension drive mechanism 330 is fixedly connected to the support inner cover 210 and is hinged to the seat frame through the support inner cover 210 and the flipping mechanism 100.
  • the drive end of the extension drive mechanism 330 is hinged to the first rhombus extension part 310.
  • the first diamond-shaped extension part 310 includes a first fixed block 311, a first connecting rod 312, a second connecting rod 313, a third connecting rod 314 and a fourth connecting rod 315.
  • the second diamond-shaped extension part 320 includes a second fixed block 321 , a fifth connecting rod 322 , a sixth connecting rod 323 , a seventh connecting rod 324 and an eighth connecting rod 325 .
  • the first fixing block 311 constitutes the first end of the first rhombus extending part 310 and is installed on the leg support plate 220 through fastening screws.
  • the second fixing block 321 constitutes the second end of the second rhombus extending component 320 and is fixed on the positioning groove 211aa of the supporting inner cover 210 through fastening screws.
  • the third connecting rod 314 and the eighth connecting rod 325 are connected as a whole to form a first integral connecting rod 340; the fourth connecting rod 315 and the seventh connecting rod 324 are integrally connected to form a second integral connecting rod 350.
  • the middle position of the first integral link 340 and the middle position of the second integral link 350 are hinged together through a connecting column 360 .
  • the first integral connecting rod 340 and the second integral connecting rod 350 can rotate around the connecting column 360 .
  • the connecting column 360 passes through the waist-shaped groove 211ab on the supporting inner cover 210 to connect with the extension screw 332, and at the same time relies on the waist-shaped groove 211ab for guidance.
  • first connecting rod 312 and the second connecting rod 313 are hinged with the first fixed block 311 , and the other end of the first connecting rod 312 is hinged with one end of the second integral connecting rod 350 .
  • the other end of the second link 313 is hingedly connected to one end of the first integral link 340 .
  • One end of the fifth connecting rod 322 and the sixth connecting rod 323 is hinged with the second fixed block 321.
  • the other end of the fifth connecting rod 322 is hinged with the other end of the first integral connecting rod 340.
  • the other end of the sixth connecting rod 323 is hinged with the second fixed block 321. It is hingedly connected with the other end of the second integral link 350 .
  • CN101580034A discloses a car seat leg rest mechanism that is optimized from 9 to 7, and the process control requirements are reduced.
  • first connecting rod 312, the second connecting rod 313, the fifth connecting rod 322, the sixth connecting rod 323, the first integral connecting rod 340 and the second integral connecting rod 350 are all in a diamond shape.
  • the first connecting rod 312, the second connecting rod 313, the fifth connecting rod 322, and the sixth connecting rod 323 are all provided with reinforcing ribs.
  • the extension drive mechanism 330 includes an extension motor 331 and an extension screw 332 driven by the extension motor 331 to perform linear motion.
  • One end of the extension screw 332 serves as a fixed end of the extension drive mechanism 330 and is installed on the leg support plate 220 through a fastening screw 321 in the positioning groove 211aa.
  • the other end of the extension screw 332 serves as the driving end of the extension driving mechanism 330 and is hingedly connected to the connecting column 360, that is, the driving end of the extension driving mechanism 330 is hinged to the other end of the third connecting rod 314, the other end of the fourth connecting rod 315, On the hinge point of the other end of the seventh link 324 and the other end of the eighth link 325 (the hinge point of the first integral link 340 and the second integral link 350 ), that is to say, the driving end of the extension drive mechanism 330 Hinged at the hinge point between the second end of the first rhombus extension part 310 and the first end of the second rhombus extension part 320 .
  • the driving force direction applied by the extending driving mechanism 330 to the first rhombus extending part 310 and the second rhombus extending part 320 is the same as the extending direction of the leg support mechanism 200.
  • the driving force of the extending mechanism 300 is located in the middle of the extending mechanism 300, and with The movement direction is the same, and the whole journey is electric The machine load changes very little, the speed is consistent and the actual operating speed is 2.5 times that of the motor.
  • the driving force of the extension is optimized to be parallel to the movement direction of the leg support mechanism 200, that is, placed vertically. It is no longer necessary to use a twin-screw screw, only a unidirectional thread screw is required, thus optimizing the structure and reducing costs.
  • the driving force of the extension mechanism 300 is located in the middle of the extension mechanism 300 and is close to the leg support mechanism 200, so that the leg support mechanism 200 runs smoothly throughout the entire stroke.
  • the present invention can also eliminate the flipping mechanism 100 and directly install the supporting inner cover 210 on the seat frame.
  • a flip mechanism well known to those skilled in the art may be used instead of the flip mechanism 100 .
  • the leg rest mechanism 200 is located under the seat frame in an unextended state and does not affect the occupant's riding.
  • the flipping mechanism 100 and the extension mechanism 300 are started by the passenger's button.
  • the flipping motor 150 in the flipping mechanism 100 is started, the flipping screw 160 is driven to perform linear motion.
  • the legrest mechanism 200 is turned over.
  • the screw rod 160 is driven and under the action of the flipping swing arm 170, the flipping synchronization rod 180, a pair of first flipping parts 120a, 120b and a pair of second flipping parts 130a, 130b to flip outward, causing the leg rest mechanism 200 to move. to the front side of the seat frame.
  • the extension motor 331 of the extension mechanism 300 is started, driving the extension screw 332 to perform linear motion, pushing the first rhombus extension component 310 and the second rhombus extension component 320 to elongate.
  • the extension member 320 pushes the leg support plate 220 to move relative to the supporting inner cover 210 by the slide rail and extends out of the cover 230, thereby achieving the extension function while the leg support plate 220 is being turned over.

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  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)
  • Seats For Vehicles (AREA)

Abstract

一种座椅腿托延伸驱动机构，包括设置在座椅骨架上的腿托机构（200），腿托机构由一延伸机构（300）驱动进行往复运动；延伸机构至少包括第一、二菱形延伸部件（310、320）以及延伸驱动机构（330），其中第一菱形延伸部件的两端分别与腿托机构和第二菱形延伸部件铰接，第二菱形延伸部件与座椅骨架铰接，延伸驱动机构的固定端与座椅骨架连接，延伸驱动机构的驱动端铰接在第一菱形延伸部件与第二菱形延伸部件的铰接处。该座椅腿托延伸驱动机构的驱动力平行于腿托机构的运动方向即纵置，不再需要采用双螺杆丝杆，只要单向螺纹丝杆即可，优化了结构，降低了成本。同时延伸机构的驱动力位于延伸机构中间，与腿托机构的距离近，使得腿托机构全行程运行平稳。

Description

一种座椅腿托延伸驱动机构 技术领域
本发明涉及座椅技术领域，具体涉及一种座椅腿托延伸驱动机构。
背景技术
为满足乘坐舒适性的要求，乘客在车内处于乘坐姿态时，脚跟点的位置决定了座椅坐垫高度不可太高，且和小腿长度接近，腿托的支撑长度与坐垫高度接近。对50th以上的乘客，腿托抬起时只能对大腿起到支撑作用，小腿段无支撑作用，舒适性不足。
目前市场上存在的延伸腿托普遍为丝杆直推方式，行程端的布置需要提供较大的空间来实现整套机构的功能，长丝杆和滑轨的组合影响整套延伸机构的稳定性及结构强度，此外，电机丝杆行程过长导致全行程运动时间加长，影响乘客体验感。
目前有中国发明专利公开号CN101580034A公开了一种汽车座椅腿托机构，其包括腿托机构包括翻转机构、支撑机构、传动机构，该专利通过传动结构来实现伸展的作用且通过翻转机构来控制翻转角度，满足乘员的舒适性，但该专利存在如下缺点：
1.该专利延伸的驱动力为横向，要求电机丝杆为双向螺纹，对制造工艺的要求高，风险点多。
2.该专利的铆接点有9个，连杆间隙和扭矩控制要求高。
3.驱动力位于腿托的最后方，延伸长度越长，电机负载越大，影响延伸速度。
4.驱动力后置，全行程平稳性相对较差。
发明内容
本发明的目的在于针对现有技术的上述不足和缺陷，提供一种座椅腿托延伸驱动机构，以解决上述问题。
本发明所解决的技术问题可以采用以下技术方案来实现：
一种座椅腿托延伸驱动机构，包括设置在座椅骨架上的腿托机构，所述腿托机构由一延伸机构驱动进行往复运动；所述延伸机构至少包括第一菱形延伸部件和第二菱形延伸部件以及一延伸驱动机构，其中第一菱形延伸部件的第一端与腿托机构铰接，所述第一菱形延伸部件的第二端与第二菱形延伸部件的第一端铰接，所述第二菱形延伸部件的第二端与所述座椅骨架铰接，所述延伸驱动机构的固定端与所述座椅骨架连接，所述延伸驱动机构的驱动端铰接在所述第一菱形延伸部件的第二端与第二菱形延伸部件的第一端的铰接处。
在本发明的一个优选实施例中，所述延伸机构安装在所述腿托机构的内部。
在本发明的一个优选实施例中，所述延伸驱动机构的驱动端铰接在所述第一菱形延伸部件的第二端与第二菱形延伸部件的第一端的铰接点上。
在本发明的一个优选实施例中，所述延伸驱动机构施加给所述第一菱形延伸部件和第二菱形延伸部件的驱动力方向与所述腿托机构的延伸方向相同。
在本发明的一个优选实施例中，所述第一菱形延伸部件包括第一固定块、第一连杆、第二连杆、第三连杆和第四连杆，所述第一固定块构成所述第一菱形延伸部件的第一端，所述第一连杆和第二连杆的一端均与所述第一固定块铰接，所述第三连杆的一端与所述第一连杆的另一端铰接，所述第四连杆的一端与所述第二连杆的另一端铰接；所述第二菱形延伸部件包括第二 固定块、第五连杆、第六连杆、第七连杆和第八连杆，所述第二固定块构成所述第二菱形延伸部件的第二端，所述第五连杆和第六连杆的一端均与所述第二固定块铰接，所述第七连杆的一端与所述第五连杆的另一端铰接，所述第八连杆的一端与所述第六连杆的另一端铰接；所述第三连杆的另一端、所述第四连杆的另一端、所述第七连杆的另一端、所述第八连杆的另一端铰接在一起；所述延伸驱动机构的驱动端铰接在所述第三连杆的另一端、所述第四连杆的另一端、所述第七连杆的另一端、所述第八连杆的另一端的铰接点上。
在本发明的一个优选实施例中，所述第三连杆与第八连杆连为一体，构成一第一整体连杆，所述第四连杆与第七连杆连为一体，构成一第二整体连杆；所述第一整体连杆与所述第二整体连杆通过一连接柱铰接起来。
在本发明的一个优选实施例中，所述第一连杆、第二连杆、第五连杆、第六连杆、第一整体连杆、第二整体连杆均呈菱形。
在本发明的一个优选实施例中，在所述第一连杆、第二连杆、第五连杆、第六连杆上均设置有加强筋。
在本发明的一个优选实施中，所述延伸驱动机构包括延伸电机和由所述延伸电机驱动进行直线运动的延伸丝杆，所述延伸丝杆的一端作为所述延伸驱动机构的固定端，所述延伸丝杆的另一端作为所述延伸驱动机构的驱动端与所述连接柱铰接。
在本发明的一个优选实施例中，所述腿托机构包括一与所述座椅骨架铰接的支撑内盖板和滑动配置在所述支撑内盖板上的腿托板，所述第二菱形延伸部件的第二端和所述延伸驱动机构的固定端均与所述支撑内盖板固定连接，所述第一菱形延伸部件的第一端与所述腿托板铰接。
在本发明的一个优选实施例中，所述腿托机构还包括一盖，所述盖固定在所述支撑内盖板上并在所述腿托机构使用时，包围在所述延伸机构的外 围，同时在所述腿托机构不使用时，所述腿托板能够缩回到所述盖与所述延伸机构之间被所述盖包围。
在本发明的一个优选实施例中，在所述支撑内盖板上设置有与所述腿托板配合的多节滑轨。
在本发明的一个优选实施例中，在所述支撑内盖板上设置有一定位槽和一腰形槽，所述第二菱形延伸部件的第二端和所述延伸驱动机构的固定端固定在定位槽内，所述第一菱形延伸部件的第一端透过所述腰形孔铰接在所述腿托板上。
在本发明的一个优选实施例中，所述支撑内盖板的横截面呈类似“几”字型结构，其具有一上支撑横板和与所述上支撑横板左右两侧连为一体且向下延伸的左支撑竖板、右支撑竖板以及分别与所述左支撑竖板、右支撑竖板的底部连为一体的左下支撑横板和右下支撑横板；在所述上支撑横板上设置有一安装槽，所述延伸机构配置在所述安装槽内；所述定位槽和所述腰形槽配置在所述安装槽中；所述腿托板的横截面呈大致的“冖”字型，具有一上腿托板和与所述上腿托板左右两侧连为一体且向下延伸的左腿托板、右腿托板；所述多节滑轨分成两组，分别为左侧滑轨组件和右侧滑轨组件，所述左侧滑轨组件安装在所述左支撑竖板与所述左腿托板之间，所述左侧滑轨组件中的固定部分与所述左支撑竖板固定连接，所述左侧滑轨组件中的滑动部分与所述左左腿托板固定连接；所述右侧滑轨组件安装在所述右支撑竖板与所述右腿托板之间，所述右侧滑轨组件中的固定部分与所述右支撑竖板固定连接，所述右侧滑轨组件中的滑动部分与所述右左腿托板固定连接；在所述腿托机构不使用时，所述支撑内盖板通过所述延伸机构收回到所述腿托板内；所述左下支撑横板、左支撑竖板以及所述左腿托板将所述右侧滑轨组件遮住，所述右下支撑横板、右支撑竖板以及所述右腿托板将所述右侧滑轨组件遮住。
在本发明的一个优选实施例中，所述盖的横截面呈大致的底部开口的“口”字型，具有一上盖板和与所述上盖板左右两侧连为一体且向下延伸的左盖板、右盖板以及分别与所述左盖板、右盖板的底部连为一体的左下盖板和右下盖板；所述上盖板包围在所述上支撑横板的外围，对所述延伸机构进行遮挡；所述左盖板包围在所述左支撑竖板的外围，所述右盖板包围在所述右左支撑竖板的外围，所述左下盖板包围在所述左下支撑横板的外围，所述右下盖板包围在所述右下支撑横板的外围，在所述腿托机构使用时，所述左盖板、左下盖板和所述右盖板、右下盖板分别对所述左侧滑轨组件中的固定部分和所述右侧滑轨组件中的固定部分进行遮盖。
在本发明的一个优选实施例中，所述支撑内盖板通过一翻转机构安装在座椅骨架上。
在本发明的一个优选实施例中，所述翻转机构位于所述支撑内盖板的下方，并在所述腿托机构不使用时被所述腿托板遮盖，在所述腿托机构使用时被所述盖遮盖。
在本发明的一个优选实施例中，所述翻转机构包括连接在座椅骨架上的连接部件、翻转部件和翻转驱动机构，所述翻转部件将所述支撑内盖板铰接在所述连接部件上，所述翻转驱动机构驱动所述支撑内盖板进行翻转。
在本发明的一个优选实施例中，所述连接部件包括一对固定在所述座椅骨架左右两侧上的连接架；所述翻转部件包括一对连接杆、一对第一翻转部件和一对第二翻转部件，所述一对连接杆与所述支撑内盖板左右两侧连接，一对第一翻转部件和一对第二翻转部件的一端分别与一对连接架固定铰接，一对第一翻转部件和一对第二翻转部件的另一端分别与一对连接杆铰接；所述翻转驱动机构的固定端安装在一连接架上，所述翻转驱动机构的驱动端与一对第一翻转部件铰接。
在本发明的一个优选实施例中，每一第一翻转部件包括第一翻转连杆和 第二翻转连杆，所述第一翻转连杆的一端与对应侧的连接架铰接，所述第一翻转连杆的另一端与所述第二翻转连杆的一端铰接，所述第二翻转连杆的另一端与对应侧的连接杆铰接；每一第二翻转部件包括第三翻转连杆和第二翻转连杆，所述第三翻转连杆的一端与对应侧的连接架铰接，所述第三翻转连杆的另一端与所述第四翻转连杆的一端铰接，所述第四翻转连杆的另一端与对应侧的连接杆铰接；所述翻转驱动机构的驱动端同所述第一翻转连杆的另一端与所述第二翻转连杆的一端之间的铰接点铰接；另外每一第一翻转部件中的第一翻转连杆与对应的第二翻转部件的第四翻转连杆铰接。
在本发明的一个优选实施例中，所述翻转驱动机构包括一翻转电机、由所述翻转电机驱动的翻转丝杆、翻转摆臂和翻转同步杆，所述翻转电机作为所述翻转驱动机构的固定端固定在一连接架上，所述翻转丝杆的一端作为所述翻转驱动机构的驱动端与所述翻转摆臂的一端铰接，所述翻转摆臂的另一端固定在所述翻转同步杆上，所述翻转同步杆的两端分别与一对第一翻转部件中的所述第一翻转连杆固定连接。
由于采用了如上的技术方案，本发明与现有技术相比，具有如下有益效果：
1.将延伸的驱动力优化为平行于腿托机构的运动方向即纵置，不再需要采用双螺杆丝杆，只要单向螺纹丝杆即可，因此优化了结构，降低了成本。
2.延伸机构的铆接点减少，由9个优化为7个，工艺控制要求降低。
3.延伸机构的驱动力位于延伸机构中间，且与运动方向一致，全行程电机负载变化很小，速率一致且实际运行速度是电机的2.5倍。
4.延伸机构的驱动力位于延伸机构中间，与腿托机构的距离近，使得腿托机构全行程运行平稳。
5.在整个腿托机构中再增加一个盖，能使得腿托机构无论在使用过程还是没有在使用时，都能使得腿托机构中的滑轨被遮盖住，提高整个腿托机构 的外形美观效果。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是本发明的打开状态示意图(去掉盖和座椅骨架)。
图2是图1的爆炸图(去掉盖和座椅骨架)。
图3是本发明打开状态分解图之一(去掉盖、座椅骨架和支撑内盖板)。
图4是本发明打开状态分解图之二(去掉盖、座椅骨架和支撑内盖板)。
图5是本发明打开状态分解图之三(去掉盖和座椅骨架)。
图6是本发明打开状态分解图之四(去掉盖和座椅骨架)。
图7是本发明闭合状态示意图(去掉盖和座椅骨架)。
图8是图7的爆炸图(去掉盖和座椅骨架)。
图9是本发明延伸机构安装在前端闭合状态示意图(去掉盖和座椅骨架)。
图10是本发明延伸机构安装在前端状态示意图(去掉盖和座椅骨架以及翻转机构)。
图11是本发明延伸机构安装在后端状态示意图(去掉盖和座椅骨架以及翻转机构)。
图12是本发明延伸机构闭合状态示意图(去掉盖和座椅骨架以及翻转机构)。
图13是本发明延伸机构与支撑内盖板安装示意图。
图14是图13的安装分解图。
图15是本发明初始状态示意图(去掉盖和座椅骨架)。
图16是本发明延伸过程状态示意图(去掉盖和座椅骨架)。
图17是本发明完全延伸状态示意图(去掉盖和座椅骨架)。
图18为本发明的盖示意图。
图19是本发明延伸过程状态示意图(去掉座椅骨架)。
图20是本发明内部结构简化示意图(去掉座椅骨架)。
具体实施方式
为了使本发明实现的技术手段、创作特征、达成目的与功效易于明白了解，下面进一步阐述本发明。
参见图1至图20所示的一种座椅腿托延伸驱动机构，包括腿托机构200、翻转机构100、延伸机构300。翻转机构100将腿托机构200连接到座椅骨架(图中未示出)上，延伸机构300滑动配置在腿托机构200上且驱动腿托机构200进行往复运动。
翻转机构100包括连接在座椅骨架(图中未示出)上的连接部件、翻转部件和翻转驱动机构。
连接部件包括一对固定在座椅骨架(图中未示出)左右两侧上的连接架110a、110b。
翻转部件包括一对连接杆140a、140b、一对第一翻转部件120a、120b和一对第二翻转部件130a、130b。
一对第一翻转部件120a、120b和一对第二翻转部件130a、130b的一端分别与一对连接架110a、110b固定铰接，一对第一翻转部件120a、120b和一对第二翻转部件130a、130b的另一端分别与一对连接杆140a、140b铰接，具体是：
每一第一翻转部件120a、120b包括第一翻转连杆121a、121b和第二翻 转连杆122a、122b，一对第一翻转连杆121a、121b的一端与对应侧的连接架110a、110b铰接，一对第一翻转连杆121a、121b的另一端与一对第二翻转连杆122a、122b的一端铰接，第二翻转连杆122a、122b的另一端与对应侧的连接杆140a、140b铰接。
每一第二翻转部件130a、130b包括第三翻转连杆131a、131b和第二翻转连杆132a、132b，第三翻转连杆131a、131b的一端与对应侧的连接架110a、110b铰接，第三翻转连杆131a、131b的另一端与第四翻转连杆132a、132b的一端铰接，第四翻转连杆132a、132b，的另一端与对应侧的连接杆140a、140b铰接。
另外第一翻转连杆121a、121b与第四翻转连杆132a、132b铰接。
翻转驱动机构包括一翻转电机150、由翻转电机150驱动的翻转丝杆160、翻转摆臂170和翻转同步杆180，翻转电机150作为翻转驱动机构的固定端固定在连接架110b上，翻转丝杆150的一端作为翻转驱动机构的驱动端与翻转摆臂170的一端铰接，翻转摆臂170的另一端固定在翻转同步杆180上。
腿托机构200包括一与座椅骨架(图中)铰接的支撑内盖板210、腿托板220、盖230和若干多节滑轨。翻转部件将支撑内盖板210铰接在连接架110a、110b上，翻转驱动机构驱动支撑内盖板210进行翻转。翻转机构100位于支撑内盖板210的下方，并在腿托机构200不使用时被腿托板220遮盖。
支撑内盖板210横截面呈类似“几”字型结构，其具有一上支撑横板211和与上支撑横板211左右两侧连为一体且向下延伸的左支撑竖板213a、右支撑竖板213b以及分别与左支撑竖板213a、右支撑竖板213b的底部连为一体的左下支撑横板214a和右下支撑横板214b；在上支撑横板211上设置有一安装槽211a，在安装槽211a中设置有定位槽211aa和腰形槽211ab。
腿托板220的横截面呈大致的“冖”字型，具有一上腿托板221和与上 腿托板221左右两侧连为一体且向下延伸的左腿托板222a、右腿托板222b。
多节滑轨分成两组，分别为左侧滑轨组件240a和右侧滑轨组件240b。
左侧滑轨组件240a安装在左支撑竖板213a与左腿托板222a之间，左侧滑轨组件240a中的固定部分241a与左支撑竖板213a固定连接，左侧滑轨组件240a中的滑动部分242a与左腿托板222a固定连接。
右侧滑轨组件240b安装在右支撑竖板213b与右腿托板222b之间，右侧滑轨组件240b中的固定部分241b与右支撑竖板213b固定连接，右侧滑轨组件240b中的滑动部分242b与右腿托板222b固定连接。
这样在腿托机构200不使用时，支撑内盖板210通过延伸机构300收回到腿托板220内，左下支撑横板214a、左支撑竖板213a以及左腿托板222a将左侧滑轨组件240a遮住，右下支撑横板214b、右支撑竖板213b以及右腿托板222b将右侧滑轨组件240b遮住。
参见图18，盖230的横截面呈大致的底部开口的“口”字型，具有一上盖板231和与上盖板231左右两侧连为一体且向下延伸的左盖板232a、右盖板232b以及分别与左盖板232a、右盖板232b的底部连为一体的左下盖板233a和右下盖板233b。
上盖板231包围在上支撑横板211的外围，对配置在安装槽211a内的延伸机构300进行遮挡；左盖板232a包围在左支撑竖板213a的外围，右盖板232b包围在右左支撑竖板213b的外围。
左下盖板233a包围在左下支撑横板214a的外围并通过两个螺钉234a固定连接；右下盖板233b包围在右下支撑横板213a的外围并通过两个螺钉234b固定连接；在腿托机构使用时，左盖板232a、左下盖板233a和右盖板232b、233b分别对左侧滑轨组件240a中的固定部分241a和右侧滑轨组件240b中的固定部分241b进行遮盖。
这样在整个腿托机构200中再增加一个盖230，能使得腿托机构200无 论在使用过程还是没有在使用时，都能使得腿托机构200中的滑轨被遮盖住，提高整个腿托机构的外形美观效果。
延伸机构300安装在腿托机构200的内部，尤其是安装在支撑内盖板210的安装槽211a内。
延伸机构300包括第一菱形延伸部件310和第二菱形延伸部件320以及一延伸驱动机构330，第一菱形延伸部件310的第一端与腿托机构200中的腿托板220铰接，第一菱形延伸部件310的第二端与第二菱形延伸部件320的第一端铰接，第二菱形延伸部件320的第二端与支撑内盖板210铰接，进而通过支撑内盖板210、翻转机构100与座椅骨架铰接。
延伸驱动机构330的固定端与支撑内盖板210固定连接，进而通过支撑内盖板210、翻转机构100与座椅骨架铰接，延伸驱动机构330的驱动端铰接在第一菱形延伸部件310的第二端与第二菱形延伸部件320的第一端的铰接处。
第一菱形延伸部件310包括第一固定块311、第一连杆312、第二连杆313、第三连杆314和第四连杆315。
第二菱形延伸部件320包括第二固定块321、第五连杆322、第六连杆323、第七连杆324和第八连杆325。
第一固定块311构成第一菱形延伸部件310的第一端，通过紧固螺钉安装在腿托板220上。
第二固定块321构成第二菱形延伸部件320的第二端，通过紧固螺钉固定在支撑内盖板210的定位槽211aa上。
第三连杆314与第八连杆325连为一体，构成一第一整体连杆340；第四连杆315与第七连杆324连为一体，构成一第二整体连杆350。第一整体连杆340的中间位置与第二整体连杆350的中间位置通过一连接柱360铰接起来，第一整体连杆340和第二整体连杆350可以绕连接柱360进行转动。 连接柱360穿过支撑内盖板210上的腰形槽211ab与延伸丝杆332连接，同时依靠腰形槽211ab进行导向。
第一连杆312和第二连杆313的一端均与第一固定块311铰接，第一连杆312的另一端与第二整体连杆350的一端铰接。第二连杆313的另一端与第一整体连杆340的一端铰接。
第五连杆322和第六连杆323的一端均与第二固定块321铰接，第五连杆322的另一端与第一整体连杆340的另一端铰接，第六连杆323的另一端与第二整体连杆350的另一端铰接。
延伸机构300采用上述技术方案后，其铆接点减少，由CN101580034A公开了一种汽车座椅腿托机构的9个优化为7个，工艺控制要求降低。
另外，为了增加强度，第一连杆312、第二连杆313、第五连杆322、第六连杆323、第一整体连杆340、第二整体连杆350均呈菱形，同时在第一连杆312、第二连杆313、第五连杆322、第六连杆323上均设置有加强筋。
延伸驱动机构330包括延伸电机331和由延伸电机331驱动进行直线运动的延伸丝杆332，延伸丝杆332的一端作为延伸驱动机构330的固定端，其通过紧固螺钉321安装在腿托板220的定位槽211aa中。延伸丝杆332的另一端作为延伸驱动机构330的驱动端与连接柱360铰接，即使得延伸驱动机构330的驱动端铰接在第三连杆314的另一端、第四连杆315的另一端、第七连杆324的另一端、第八连杆325的另一端的铰接点(第一整体连杆340与第二整体连杆350的铰接点)上，也就是说延伸驱动机构330的驱动端铰接在第一菱形延伸部件310的第二端与第二菱形延伸部件320的第一端的铰接点上。这样延伸驱动机构330施加给第一菱形延伸部件310和第二菱形延伸部件320的驱动力方向与腿托机构200的延伸方向相同，这样由于延伸机构300的驱动力位于延伸机构300中间，且与运动方向一致，全行程电 机负载变化很小，速率一致且实际运行速度是电机的2.5倍。同时将延伸的驱动力优化为平行于腿托机构200的运动方向即纵置，不再需要采用双螺杆丝杆，只要单向螺纹丝杆即可，因此优化了结构，降低了成本。再者延伸机构300的驱动力位于延伸机构300中间，与腿托机构200的距离近，使得腿托机构200全行程运行平稳。
本发明还可以取消翻转机构100，直接将支撑内盖板210安装在座椅骨架上。或者采用本领域技术人员所熟知的翻转机构取代翻转机构100。
本发明的工作原理如下：
首先腿托机构200未延伸状态处于座椅骨架下方，不影响乘员的乘坐。在需要使用腿托时，通过乘员的按钮启动，翻转机构100和延伸机构300进行工作，其中翻转机构100中的翻转电机150启动后，带动翻转丝杆160进行直线运动，腿托机构200通过翻转丝杆160的驱动并在翻转摆臂170、翻转同步杆180、一对第一翻转部件120a、120b和一对第二翻转部件130a、130b的作用下，向外翻转，使得腿托机构200运动到座椅骨架的前侧。此时，延伸机构300的延伸电机331启动，驱动延伸丝杆332进行直线运动，推动第一菱形延伸部件310和第二菱形延伸部件320进行伸长运动，第一菱形延伸部件310和第二菱形延伸部件320在伸长过程中，推动腿托板220依靠滑轨相对支撑内盖板210进行运动伸出盖230，从而实现在腿托板220在翻转的同时进行延伸作用。
以上显示和描述了本发明的基本原理、主要特征和本发明的优点。本行业的技术人员应该了解，本发明不受上述实施例的限制，上述实施例和说明书中描述的只是说明本发明的原理，在不脱离本发明精神和范围的前提下，本发明还会有各种变化和改进，这些变化和改进都落入要求保护的本发明范围内。本发明要求保护范围由所附的权利要求书及其等效物界定。

Claims (21)

  1. 一种座椅腿托延伸驱动机构，包括设置在座椅骨架上的腿托机构，所述腿托机构由一延伸机构驱动进行往复运动；所述延伸机构至少包括第一菱形延伸部件和第二菱形延伸部件以及一延伸驱动机构，其中第一菱形延伸部件的第一端与腿托机构铰接，所述第一菱形延伸部件的第二端与第二菱形延伸部件的第一端铰接，所述第二菱形延伸部件的第二端与所述座椅骨架铰接，所述延伸驱动机构的固定端与所述座椅骨架连接，所述延伸驱动机构的驱动端铰接在所述第一菱形延伸部件的第二端与第二菱形延伸部件的第一端的铰接处。
  2. 如权利要求1所述的一种座椅腿托延伸驱动机构，所述延伸机构安装在所述腿托机构的内部。
  3. 如权利要求2所述的一种座椅腿托延伸驱动机构，其特征在于，所述延伸驱动机构的驱动端铰接在所述第一菱形延伸部件的第二端与第二菱形延伸部件的第一端的铰接点上。
  4. 如权利要求3所述的一种座椅腿托延伸驱动机构，其特征在于，所述延伸驱动机构施加给所述第一菱形延伸部件和第二菱形延伸部件的驱动力方向与所述腿托机构的延伸方向相同。
  5. 如权利要求1至4任一项权利要求所述的一种座椅腿托延伸驱动机构，其特征在于，所述第一菱形延伸部件包括第一固定块、第一连杆、第二连杆、第三连杆和第四连杆，所述第一固定块构成所述第一菱形延伸部件的第一端，所述第一连杆和第二连杆的一端均与所述第一固定块铰接，所述第三连杆的一端与所述第一连杆的另一端铰接，所述第四连杆的一端与所述第二连杆的另一端铰接；所述第二菱形延伸部件包括第二固定块、第五连杆、第六连杆、第七连杆和第八连杆，所述第二固定块构成所述第二菱形延伸部件的第二端，所述第五连杆和第六连杆的一端均与所述第二固定块铰接，所 述第七连杆的一端与所述第五连杆的另一端铰接，所述第八连杆的一端与所述第六连杆的另一端铰接；所述第三连杆的另一端、所述第四连杆的另一端、所述第七连杆的另一端、所述第八连杆的另一端铰接在一起；所述延伸驱动机构的驱动端铰接在所述第三连杆的另一端、所述第四连杆的另一端、所述第七连杆的另一端、所述第八连杆的另一端的铰接点上。
  6. 如权利要求5所述的一种座椅腿托延伸驱动机构，其特征在于，所述第三连杆与第八连杆连为一体，构成一第一整体连杆，所述第四连杆与第七连杆连为一体，构成一第二整体连杆；所述第一整体连杆与所述第二整体连杆通过一连接柱铰接起来。
  7. 如权利要求6所述的一种座椅腿托延伸驱动机构，其特征在于，所述第一连杆、第二连杆、第五连杆、第六连杆、第一整体连杆、第二整体连杆均呈菱形。
  8. 如权利要求7所述的一种座椅腿托延伸驱动机构，其特征在于，在所述第一连杆、第二连杆、第五连杆、第六连杆上均设置有加强筋。
  9. 如权利要求7所述的一种座椅腿托延伸驱动机构，其特征在于，所述延伸驱动机构包括延伸电机和由所述延伸电机驱动进行直线运动的延伸丝杆，所述延伸丝杆的一端作为所述延伸驱动机构的固定端，所述延伸丝杆的另一端作为所述延伸驱动机构的驱动端与所述连接柱铰接。
  10. 如权利要求9所述的一种座椅腿托延伸驱动机构，其特征在于，所述腿托机构包括一与所述座椅骨架铰接的支撑内盖板和滑动配置在所述支撑内盖板上的腿托板，所述第二菱形延伸部件的第二端和所述延伸驱动机构的固定端均与所述支撑内盖板固定连接，所述第一菱形延伸部件的第一端与所述腿托板铰接。
  11. 如权利要求10所述的一种座椅腿托延伸驱动机构，其特征在于，所述腿托机构还包括一盖，所述盖固定在所述支撑内盖板上并在所述腿托机构 使用时，包围在所述延伸机构的外围，同时在所述腿托机构不使用时，所述腿托板能够缩回到所述盖与所述延伸机构之间被所述盖包围。
  12. 如权利要求11所述的一种座椅腿托延伸驱动机构，其特征在于，在所述支撑内盖板上设置有与所述腿托板配合的多节滑轨。
  13. 如权利要求12所述的一种座椅腿托延伸驱动机构，其特征在于，在所述支撑内盖板上设置有一定位槽和一腰形槽，所述第二菱形延伸部件的第二端和所述延伸驱动机构的固定端固定在定位槽内，所述第一菱形延伸部件的第一端透过所述腰形孔铰接在所述腿托板上。
  14. 如权利要求13所述的一种座椅腿托延伸驱动机构，其特征在于，所述支撑内盖板的横截面呈类似“几”字型结构，其具有一上支撑横板和与所述上支撑横板左右两侧连为一体且向下延伸的左支撑竖板、右支撑竖板以及分别与所述左支撑竖板、右支撑竖板的底部连为一体的左下支撑横板和右下支撑横板；在所述上支撑横板上设置有一安装槽，所述延伸机构配置在所述安装槽内；所述定位槽和所述腰形槽配置在所述安装槽中；所述腿托板的横截面呈大致的“冖”字型，具有一上腿托板和与所述上腿托板左右两侧连为一体且向下延伸的左腿托板、右腿托板；所述多节滑轨分成两组，分别为左侧滑轨组件和右侧滑轨组件，所述左侧滑轨组件安装在所述左支撑竖板与所述左腿托板之间，所述左侧滑轨组件中的固定部分与所述左支撑竖板固定连接，所述左侧滑轨组件中的滑动部分与所述左左腿托板固定连接；所述右侧滑轨组件安装在所述右支撑竖板与所述右腿托板之间，所述右侧滑轨组件中的固定部分与所述右支撑竖板固定连接，所述右侧滑轨组件中的滑动部分与所述右左腿托板固定连接；在所述腿托机构不使用时，所述支撑内盖板通过所述延伸机构收回到所述腿托板内；所述左下支撑横板、左支撑竖板以及所述左腿托板将所述右侧滑轨组件遮住，所述右下支撑横板、右支撑竖板以及所述右腿托板将所述右侧滑轨组件遮住。
  15. 如权利要求14所述的一种座椅腿托延伸驱动机构，其特征在于，所述盖的横截面呈大致的底部开口的“口”字型，具有一上盖板和与所述上盖板左右两侧连为一体且向下延伸的左盖板、右盖板以及分别与所述左盖板、右盖板的底部连为一体的左下盖板和右下盖板；所述上盖板包围在所述上支撑横板的外围，对所述延伸机构进行遮挡；所述左盖板包围在所述左支撑竖板的外围，所述右盖板包围在所述右左支撑竖板的外围，所述左下盖板包围在所述左下支撑横板的外围，所述右下盖板包围在所述右下支撑横板的外围，在所述腿托机构使用时，所述左盖板、左下盖板和所述右盖板、右下盖板分别对所述左侧滑轨组件中的固定部分和所述右侧滑轨组件中的固定部分进行遮盖。
  16. 如权利要求9所述的一种座椅腿托延伸驱动机构，其特征在于，所述支撑内盖板通过一翻转机构安装在座椅骨架上。
  17. 如权利要求16所述的一种座椅腿托延伸驱动机构，其特征在于，所述翻转机构位于所述支撑内盖板的下方，并在所述腿托机构不使用时被所述腿托板遮盖，在所述腿托机构使用时被所述盖遮盖。
  18. 如权利要求17所述的一种座椅腿托延伸驱动机构，其特征在于，所述翻转机构包括连接在座椅骨架上的连接部件、翻转部件和翻转驱动机构，所述翻转部件将所述支撑内盖板铰接在所述连接部件上，所述翻转驱动机构驱动所述支撑内盖板进行翻转。
  19. 如权利要求18所述的一种座椅腿托延伸驱动机构，其特征在于，所述连接部件包括一对固定在所述座椅骨架左右两侧上的连接架；所述翻转部件包括一对连接杆、一对第一翻转部件和一对第二翻转部件，所述一对连接杆与所述支撑内盖板左右两侧连接，一对第一翻转部件和一对第二翻转部件的一端分别与一对连接架固定铰接，一对第一翻转部件和一对第二翻转部件的另一端分别与一对连接杆铰接；所述翻转驱动机构的固定端安装在一连接 架上，所述翻转驱动机构的驱动端与一对第一翻转部件铰接。
  20. 如权利要求19所述的一种座椅腿托延伸驱动机构，其特征在于，每一第一翻转部件包括第一翻转连杆和第二翻转连杆，所述第一翻转连杆的一端与对应侧的连接架铰接，所述第一翻转连杆的另一端与所述第二翻转连杆的一端铰接，所述第二翻转连杆的另一端与对应侧的连接杆铰接；每一第二翻转部件包括第三翻转连杆和第二翻转连杆，所述第三翻转连杆的一端与对应侧的连接架铰接，所述第三翻转连杆的另一端与所述第四翻转连杆的一端铰接，所述第四翻转连杆的另一端与对应侧的连接杆铰接；所述翻转驱动机构的驱动端同所述第一翻转连杆的另一端与所述第二翻转连杆的一端之间的铰接点铰接；另外每一第一翻转部件中的第一翻转连杆与对应的第二翻转部件的第四翻转连杆铰接。
  21. 如权利要求20所述的一种座椅腿托延伸驱动机构，其特征在于，所述翻转驱动机构包括一翻转电机、由所述翻转电机驱动的翻转丝杆、翻转摆臂和翻转同步杆，所述翻转电机作为所述翻转驱动机构的固定端固定在一连接架上，所述翻转丝杆的一端作为所述翻转驱动机构的驱动端与所述翻转摆臂的一端铰接，所述翻转摆臂的另一端固定在所述翻转同步杆上，所述翻转同步杆的两端分别与一对第一翻转部件中的所述第一翻转连杆的另一端与所述第二翻转连杆的一端铰接。
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