WO2020015024A1 - 车辆座椅及其角度调节装置 - Google Patents

车辆座椅及其角度调节装置 Download PDF

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Publication number
WO2020015024A1
WO2020015024A1 PCT/CN2018/098499 CN2018098499W WO2020015024A1 WO 2020015024 A1 WO2020015024 A1 WO 2020015024A1 CN 2018098499 W CN2018098499 W CN 2018098499W WO 2020015024 A1 WO2020015024 A1 WO 2020015024A1
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WO
WIPO (PCT)
Prior art keywords
elastic member
unlocking
expansion
adjusting device
angle adjusting
Prior art date
Application number
PCT/CN2018/098499
Other languages
English (en)
French (fr)
Inventor
李双强
雷自立
罗贤虎
殷锋
邓威
Original Assignee
湖北航嘉麦格纳座椅系统有限公司
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
Priority claimed from CN201821164386.XU external-priority patent/CN208593319U/zh
Priority claimed from CN201810806392.9A external-priority patent/CN108657032B/zh
Application filed by 湖北航嘉麦格纳座椅系统有限公司 filed Critical 湖北航嘉麦格纳座椅系统有限公司
Priority to US17/254,133 priority Critical patent/US11247587B2/en
Priority to EP18926685.1A priority patent/EP3825170B1/en
Publication of WO2020015024A1 publication Critical patent/WO2020015024A1/zh

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    • 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
    • B60N2/22—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable
    • B60N2/235—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable by gear-pawl type mechanisms
    • B60N2/2356—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable by gear-pawl type mechanisms with internal pawls
    • B60N2/236—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable by gear-pawl type mechanisms with internal pawls linearly movable
    • 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
    • B60N2/22—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable
    • B60N2/235—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable by gear-pawl type mechanisms
    • B60N2/2356—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable by gear-pawl type mechanisms with internal pawls
    • B60N2/2362—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable by gear-pawl type mechanisms with internal pawls rotatably movable
    • 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
    • B60N2/22—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable
    • B60N2/2227—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable and provided with braking systems

Definitions

  • the invention relates to the technical field of mechanical design, in particular to a vehicle seat and an angle adjusting device thereof.
  • the angle of the seat back with respect to the seat seat needs to be adjusted to improve the seating comfort of the seat.
  • the existing vehicle angle adjustment device includes a ratchet wheel fixedly connected to the seat back and provided with internal teeth, a chute plate fixed to the seat and provided with a chute, and a plurality of sliders having external teeth are provided on the chute plate.
  • the slider controls its extension in the radial direction through the expansion and contraction mechanism to achieve the meshing between the internal teeth of the ratchet and the external teeth of the slider.
  • reset springs are arranged between the sliders, and each reset spring is along the axial direction. The two ends of the slider and the expansion and contraction mechanism of the chute plate respectively abut against each other so as to achieve the synchronous expansion and contraction of each slider in the radial direction.
  • the locking torque of the slider extending in the radial direction during locking is provided by the return spring. Accordingly, when unlocking, the external unlocking torque must also be able to overcome the locking torque to achieve unlocking.
  • the above-mentioned locking torque of the return spring is usually set to a large value, which causes a large unlocking torque also when unlocking, thereby making the unlocking comfort worse.
  • an object of the present invention is to provide an angle adjusting device, including an unlocking cam, a ratchet provided with internal teeth, a plurality of sliders distributed along the circumferential direction and provided with external teeth, and further including a corresponding arrangement with the slider.
  • a plurality of expansion and contraction blocks, the expansion and contraction blocks can drive the slider to move outward in the radial direction, so that the internal teeth and the external teeth mesh; there is a second elasticity between adjacent expansion and contraction blocks Two ends of the second elastic member along the deformation direction are respectively connected to the unlocking cam and the expansion and contraction block.
  • the expansion and contraction block is used to drive the slider to extend in the radial direction so as to realize the engagement between the slider and the ratchet.
  • the unlocking cam rotates toward the unlocking direction, the slider and the ratchet can be separated.
  • an externally provided unlocking torque is required to drive the unlocking cam to rotate in the unlocking direction, and only when the unlocking torque reaches a certain value, can the unlocking cam be driven to rotate in the unlocking direction against the locking force.
  • a second elastic member in a compressed state connected to the unlocking cam and the expansion and contraction block can act on the unlocking cam and the expansion and contraction block, and the elasticity of the second elastic member to the unlocking cam
  • the force is in the unlocking direction and the elastic force on the expansion and contraction block is in the locking direction. Therefore, the elastic force of the second elastic member on the unlocking cam toward the unlocking direction can reduce the unlocking torque required by the outside world to act on the unlocking cam. Therefore, the angle adjustment device only needs a small unlocking torque to realize the unlocking process, and improves the comfort of unlocking.
  • the second elastic member can provide sufficient elastic force to drive the expansion and contraction block to rotate, thereby ensuring the reliability of the locking process.
  • the number of sliders is large, it still has High unlocking comfort and locking reliability.
  • it further includes a first elastic member and a chute plate that rotates relative to the ratchet wheel.
  • One end of the first elastic member is connected to the chute plate, and the other end is directly or indirectly connected to the unlock cam so that The torque of the unlocking cam is transmitted.
  • the unlocking cam has a central hole
  • the central shaft is adapted to the central hole, and the central shaft can drive the unlocking cam to rotate in the unlocking direction when the central shaft rotates in the unlocking direction;
  • the first elastic member is connected to the central shaft so as to be indirectly connected to the unlock cam.
  • the unlocking cam has a plurality of first projections
  • the expansion and contraction blocks are provided with matching grooves
  • two ends of the second elastic member in the deformation direction are respectively corresponding to the corresponding first projections and the first projections.
  • the mating grooves are offset.
  • the unlocking cam is provided with a plurality of mounting holes, and a flange is provided at a side wall of the mounting hole, and the flange is the first protrusion.
  • the expansion and contraction block has a second projection
  • the unlocking cam is provided with a groove
  • two ends of the second elastic member in the deformation direction are respectively connected with the second projection and the groove.
  • the side walls are offset.
  • the first elastic member is a flat scroll spring, and an outer end thereof is fixed to the chute plate, and an inner end thereof is fixed to the central shaft so as to transmit a torque of the central shaft.
  • the chute plate is provided with a fixing post, the outer end of the first elastic member is hooked to the fixing post, and the central axis drives the inner end of the first elastic member to rotate toward the unlocking direction.
  • the fixing post can limit the movement of the outer end of the first elastic member.
  • the middle of the chute plate has a flange, and the expansion and contraction block can move along the outer peripheral surface of the flange;
  • the flange is integrally formed with the chute plate, or the flange is fixedly connected with the chute plate.
  • the present invention also provides a vehicle seat, including a seat and a seat back, and an angle adjustment device for adjusting an angle of the seat back with respect to the seat, wherein the angle adjustment device is the above-mentioned Angle adjustment device.
  • FIG. 1 is an exploded view of an angle adjusting device provided by the present invention
  • FIG. 2 is a schematic structural diagram of a core piece of an angle adjusting device provided by the present invention.
  • FIG. 3 is a schematic structural diagram of the chute plate of FIG. 2;
  • FIG. 5 is a rear view of FIG. 3;
  • FIG. 6 is a schematic structural diagram of FIG. 3 with the first elastic member and the slider removed.
  • FIG. 1 is an exploded view of the angle adjusting device provided by the present invention
  • FIG. 2 is a schematic structural diagram of the core parts of the angle adjusting device provided by the present invention
  • FIG. 3 is a slide slot plate removed from FIG. 2 4 is a schematic view of the structure from another perspective of 3
  • FIG. 5 is a rear view of FIG. 3
  • FIG. 6 is a schematic view of the structure of FIG. 3 with the first elastic member and the slider removed.
  • the present invention provides an angle adjustment device.
  • the angle adjustment device includes a sheath 1, a ratchet wheel 2 and a chute plate 8, wherein the sheath 1 is used to connect the ratchet wheel 2.
  • the chute plate 8 and the chute plate 8 are fixed to each other in the axial direction, and the ratchet wheel 2 and the chute plate 8 can rotate relative to each other.
  • the angle adjusting device is used for a vehicle seat, the ratchet wheel 2 is fixed to the seat back of the vehicle seat.
  • the angle adjusting device further includes a core piece capable of adjusting the angle.
  • the core piece includes an unlocking cam 3 and a plurality of sliders 4 that are distributed along the groove plate 8 in the circumferential direction and are provided with external teeth 42.
  • the external teeth of the slider 4 42 can mesh with the internal teeth of ratchet wheel 2, and the external teeth 42 and the internal teeth have at least three meshing relationships, which are: tooth-to-tooth (unmeshing) state, semi-meshing state, and fully meshing state.
  • tooth-to-tooth unmeshing
  • semi-meshing state semi-meshing state
  • fully meshing state When the teeth are in a tooth-to-tooth state, the angle adjusting device is in an unlocked state.
  • the angle adjusting device is in a locked state.
  • the angle adjusting device is a process of moving from unlocking to locking.
  • the slider 4 needs to be able to move in the radial direction, and when the external teeth 42 move radially outward
  • the internal teeth of 2 mesh, and the external teeth 42 can be disengaged from the internal teeth when moving radially inward.
  • the angle adjusting device is provided with an expansion and contraction mechanism.
  • the expansion and contraction mechanism includes a plurality of expansion and contraction blocks 6, and each expansion and contraction block 6 is distributed along the circumferential direction of the chute plate 8 and is located in the same diameter direction as each of the sliders 4.
  • the inner ring has a first mating surface
  • the outer ring of the expansion and contraction block 6 has a second mating surface, both of which are curved surfaces, and the bending directions are opposite; or one of the first mating surface and the second mating surface is a flat surface,
  • the other is an arc surface protruding toward the other.
  • the second mating surface of the expansion and contraction block 6 is an arc surface protruding outward, and the first mating surface of the slider 4. Is flat.
  • the second elastic member 52 is used to drive the expansion and contraction block 6 to move in a circumferential direction, thereby changing the second mating surface and the first A position where the mating surfaces abut each other, so as to drive the slider 4 to move outward in the radial direction, thereby achieving the meshing of the external teeth 42 of the slider 4 with the internal teeth of the ratchet wheel 2.
  • the unlock cam 3 is provided with a plurality of slider control grooves 31.
  • the slider control grooves 31 are arc-shaped grooves.
  • the slider 4 has a plurality of slider bosses 41.
  • the slider bosses 41 are located in the slider control grooves 31. Inside, and can slide relative to the slider control groove 31.
  • the expansion and contraction block 6 rotates in the locking direction under the action of the second elastic member 52.
  • the corresponding slider 4 can be driven to extend radially outward until the outer teeth 42 and the inner teeth are completely Engage to reach the locked state.
  • the expansion and contraction block 6 is in the self-locking position.
  • the external torque drives the unlocking cam 3 to rotate toward the unlocking direction
  • the second elastic member 52 drives the expansion and contraction block 6 to leave the self-locking position
  • the slider control groove 31 rotates the slider 4 to move radially inward until the outer teeth 42 is completely disengaged from the internal teeth and reaches an unlocked state.
  • the middle of the chute plate 8 has a flange 84, and each of the expansion and contraction blocks 6 is evenly distributed on the outer periphery of the flange 84.
  • the expansion and contraction block 6 can be driven along the outer periphery of the flange 84 under the driving of the second elastic member 52.
  • the wall rotates in the circumferential direction.
  • the flange 84 may be integrally formed with the chute plate 8 or may be fixedly connected to the chute plate 8.
  • the flange 84 and the chute plate 8 are separate structures, and the two have The hooks and the grooves are adapted to each other, so as to realize the clamping and fixing.
  • the chute plate 8 has a plurality of chute slots 81 adapted to the slider 4, and the slider 4 can move radially in the corresponding chute 81.
  • the chute plate 8 has a plurality of fan-shaped bosses 82 evenly distributed along the circumferential direction, and the above-mentioned chute 81 is formed between adjacent fan-shaped bosses 82.
  • each second elastic member 52 in the deformation direction is respectively connected to the unlocking cam 3 and the expansion and contraction block 6.
  • the expansion and contraction block 6 is used to drive the slider 4 to extend in the radial direction so as to achieve the meshing of the slider 4 and the ratchet wheel 2.
  • the unlock cam 3 rotates in the unlocking direction
  • the slider 4 and the ratchet wheel 2 can be separated.
  • an external unlocking torque is required to drive the unlocking cam 3 to rotate in the unlocking direction, and only when the unlocking torque reaches a certain value, the unlocking cam 3 can be driven to rotate in the unlocking direction against the locking force.
  • the second elastic member 52 in the compressed state and connected to the unlocking cam 3 and the expansion and contraction block 6 can act on the unlocking cam 3 and the expansion and contraction block. 6, and the elastic force of the second elastic member 6 on the unlocking cam 3 is in the unlocking direction (counterclockwise as shown in FIG. 4), and the elastic force on the expansion and contraction block 6 is in the locking direction (as shown in FIG. 4).
  • the elastic force of the second elastic member 6 toward the unlocking cam 3 toward the unlocking direction can reduce the unlocking torque required by the outside world to act on the unlocking cam 3, so that the angle adjustment device only needs to The small unlocking torque can realize the unlocking process and improve the comfort of unlocking.
  • the second elastic member 52 can provide sufficient elastic force to drive the expansion and contraction block 6 to rotate, thereby ensuring the reliability of the locking process, and the locking torque is changed by the second The elastic member 52 determines that the size can be arbitrarily designed. When the number of the sliders 4 is large, it still has high unlocking comfort and locking reliability.
  • the angle adjusting device further includes a first elastic member 51, one end of which is connected to the chute plate 8, and the other end is directly or indirectly connected to the unlock cam 3 for transmission.
  • the outside world acts on the unlocking torque of the unlocking cam 3.
  • the unlocking cam 3 when unlocking, the unlocking cam 3 is driven to rotate relative to the chute plate 8 and the first elastic member 51 can transmit the unlocking torque acting on the unlocking cam 3 from the outside. Therefore, the unlocking torque required for unlocking the cam 3 is determined by the first The torque transmitted by an elastic member 51 is characterized. At the same time, the elastic force of the second elastic member 52 on the unlocking cam 2 can reduce the transmitted torque of the first elastic member 51, thereby reducing the required unlocking torque.
  • first elastic member 51 and the second elastic member 52 are both connected (directly or indirectly) to the unlock cam 3, and the directions of the unlocking forces of the two to the unlock cam 3 are opposite during the unlocking process, thereby reducing the The unlocking force required by the outside world improves the comfort of unlocking.
  • the angle adjusting device further includes a central shaft 7.
  • the unlocking cam 3 has a central hole 32.
  • the central hole 32 is a flat hole having an arc section and a straight section.
  • the central shaft 7 has a central hole. 32 matching flat steps 71, the flat steps 71 and the central hole 32 are tightly matched, so that when the external handle drives the central shaft 7 to rotate, the unlock cam 3 can be driven to rotate, and the unlocking torque acting on the central shaft 7 is external
  • the torque provided by the handle and the torque received by the unlocking cam 3 (the torque provided by the outside world) are the torque of the first elastic member 51 to the unlocking cam 3 minus the torque of the second elastic member 52 to the unlocking cam 3.
  • the first elastic member 51 is connected to the central shaft 7 so as to be indirectly connected to the unlocking cam 3.
  • indirectly connecting the first elastic member 51 to the unlocking cam 3 through the central shaft 7 has the advantage of saving the installation space of the core member, and makes it convenient to arrange the first elastic member 51 without changing the arrangement of the second elastic member 52.
  • the first elastic member 51 is a flat scroll spring, which can transmit torque, and its inner end is fixed to the central shaft 7 and can rotate with the central shaft 7. The end is fixed to the chute plate 8.
  • the central shaft 7 has a fitting section 72 whose cross section is square.
  • a square hole is formed at the inner end of the flat scroll spring, and the square hole is covered with the fitting section 72 to realize a planar vortex. Connection between the coil spring and the central shaft 7.
  • the fan-shaped boss 82 of the chute plate 8 is provided with a fixing post 83, the outer end of the first elastic member 51 is hooked to the fixing post 83, and the inner end of the first elastic member 51 is rotated by the central shaft 7 toward the unlocking direction.
  • the fixing post 83 can limit the movement of the outer end of the first elastic member 51. Therefore, the outer end of the flat scroll spring is fixed, and the inner end receives and transmits torque.
  • the fixing between the first elastic member 51 and the chute plate 8 does not have to be realized by the fixing post 83, and other fixing methods in the art, such as welding, can also be adopted.
  • the unlocking cam 3 has a plurality of first projections 34 extending in the direction of the expansion and contraction block 6.
  • the expansion and contraction block 6 is provided with a matching groove 61 along the circumferential side wall portion. Two ends of the two elastic members 52 in the deformation direction respectively abut the corresponding first projections 34 and the matching grooves 61, so as to realize the connection between the second elastic member 52 and the unlocking cam 3 and the expansion and contraction block 52.
  • the unlocking cam 3 is provided with a plurality of mounting holes 33.
  • the mounting holes 33 are used to install various components of the angle adjustment device, and a flange is provided at a side wall of the mounting hole 33.
  • the side is the first bump 34 described above.
  • the first bump 34 may also be a structure welded to the surface of the unlock cam 3.
  • the expansion and contraction block 6 has a second projection extending toward the unlocking cam 3, the unlocking cam 3 is provided with a groove, and two ends of the second elastic member 52 in the deformation direction are respectively connected to the second projection and the recess. The side walls of the groove abut against each other, so that the second elastic member 52 is connected to the unlocking cam 3 and the expansion and contraction block 52.
  • connection structure of the three is not limited.
  • the expansion and contraction block 6 is a wedge-shaped block.
  • angle adjusting device in the present invention can be used for adjusting the seat back of a vehicle seat, or it can also be used for relative angle adjustment on other structures.
  • the present invention also provides a vehicle seat, which includes a seat and a seat back, and further includes an angle adjustment device for adjusting the angle of the seat back with respect to the seat, wherein the angle adjustment device is in any of the above embodiments.
  • the angle adjusting device is in any of the above embodiments.
  • a vehicle seat including the angle adjustment device should also have corresponding technical effects, which will not be repeated here.

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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

车辆座椅及其角度调节装置，角度调节装置包括解锁凸轮（3）、设有内齿的棘轮（2）和沿周向分布且设有外齿的若干滑块（4），还包括与滑块（4）对应设置的若干胀缩块（6），胀缩块（6）能够驱动滑块（4）沿径向向外运动，以使该内齿与该外齿啮合；相邻胀缩块（6）之间具有第二弹性件（52），第二弹性件（52）沿变形方向的两端分别与解锁凸轮（3）和胀缩块（6）相连。

Description

车辆座椅及其角度调节装置
本申请要求于2018年07月20日提交中国专利局、申请号为201810806392.9、发明名称为“车辆座椅及其角度调节装置”，以及申请号为201821164386.X、发明名称为“车辆座椅及其角度调节装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及机械设计技术领域，特别涉及车辆座椅及其角度调节装置。
背景技术
车辆座椅在使用时，为了适应不同用户的使用需求，需对椅背相对于椅座的角度进行调节，以提高座椅的乘坐舒适性。
目前，现有的车辆角度调节装置包括与椅背固定连接并设置有内齿的棘轮、与椅座固定并设置有滑槽的滑槽板，具有外齿的若干滑块设置于滑槽板，且滑块通过胀缩机构控制其沿径向伸出，以实现棘轮的内齿与滑块的外齿之间的啮合，同时，各滑块之间设置有复位弹簧，各复位弹簧沿轴向的两端分别与滑槽板上的凸缘和胀缩机构相抵，以便实现各滑块沿径向同步伸缩。
上述角度调节过程中，锁止时，滑块沿径向伸出的锁止扭矩由复位弹簧提供，相应地，解锁时，外界的解锁扭矩也需能够克服该锁止扭矩才能实现解锁，通常情况下，为了保证锁止可靠性，复位弹簧的上述锁止扭矩通常设置为较大值，导致解锁时也需要较大的解锁扭矩，从而使得解锁舒适性较差。
有鉴于此，如何提供一种角度调节装置，使其在保证具有较高锁止可靠性的前提下，还能够提高解锁舒适性，是本领域技术人员亟待解决的技术问题。
发明内容
为解决上述技术问题，本发明的目的为提供角度调节装置，包括解锁凸轮、设有内齿的棘轮、沿周向分布且设有外齿的若干滑块，还包括与所述滑块对应设置的若干胀缩块，所述胀缩块能够驱动所述滑块沿径向向外运动，以使所述内齿与所述外齿啮合；相邻所述胀缩块之间具有第二弹性件，所述第二弹性件沿变形方向的两端分别与所述解锁凸轮和所述胀缩块相连。
胀缩块用于驱动滑块沿径向伸出，以便实现滑块与棘轮的啮合，解锁凸轮朝向解锁方向转动时，能够实现滑块与棘轮的分离。解锁时，需要外界提供解锁扭矩驱动解锁凸轮朝向解锁方向转动，且只有该解锁扭矩达到一定数值时，才能够驱动解锁凸轮克服锁止力朝向解锁方向转动。
本发明中，当解锁凸轮朝向解锁方向转动时，处于压缩状态、与解锁凸轮和胀缩块相连的第二弹性件能够作用于解锁凸轮与胀缩块，且第二弹性件对解锁凸轮的弹性力朝向解锁方向，对胀缩块的弹性力朝向锁止方向，因此，该第二弹性件对解锁凸轮朝向解锁方向的弹性力能够减小解锁时外界所需提供的作用于解锁凸轮的解锁扭矩，从而使得该角度调节装置仅需较小的解锁扭矩即可实现解锁过程，提高解锁的舒适性。
同时，在锁止过程，上述解锁扭矩消失后，该第二弹性件能够提供足够的弹性力，以驱动胀缩块转动，从而保证锁止过程的可靠性，当滑块数量较多时，仍然具有较高的解锁舒适性和锁止可靠性。
可选地，还包括第一弹性件和与所述棘轮相对转动的滑槽板，所述第一弹性件一端与所述滑槽板相连，另一端直接或间接连接于所述解锁凸轮，以便传递所述解锁凸轮的扭矩。
可选地，进一步包括中心轴，所述解锁凸轮具有中心孔，所述中心轴与所述中心孔相适配，且所述中心轴沿解锁方向转动时能够带动所述解锁凸轮沿解锁方向转动；
所述第一弹性件连接于所述中心轴，以便间接连接于所述解锁凸轮。
可选地，所述解锁凸轮具有若干第一凸块，所述胀缩块开设有配合槽，所述第二弹性件沿变形方向的两端分别与对应的所述第一凸块和所述配合槽相抵。
可选地，所述解锁凸轮开设有若干安装孔，所述安装孔的侧壁处设置有翻边，所述翻边为所述第一凸块。
可选地，所述胀缩块具有第二凸块，所述解锁凸轮开设有凹槽，所述第二弹性件沿变形方向的两端分别与所述第二凸块和所述凹槽的侧壁相抵。
可选地，所述第一弹性件为平面涡卷弹簧，且其外端固定于所述滑槽板，内端固定于所述中心轴，以便传递所述中心轴的扭矩。
可选地，所述滑槽板设置有固定柱，所述第一弹性件的外端钩挂于所述固定柱，且所述中心轴带动所述第一弹性件的内端朝向解锁方向转动时，所述固定柱能够限制所述第一弹性件的外端运动。
可选地，所述滑槽板中部具有凸缘，所述胀缩块能够沿所述凸缘的外周面运动；
所述凸缘与所述滑槽板一体成型，或者所述凸缘与所述滑槽板固定连接。
同时，本发明还提供车辆座椅，包括椅座和椅背，还包括用于调节所述椅背相对于所述椅座角度的角度调节装置，其中，所述角度调节装置为以上所述的角度调节装置。
附图说明
图1为本发明所提供角度调节装置的爆炸图；
图2为本发明所提供角度调节装置核心件的结构示意图；
图3为图2的去掉滑槽板的结构示意图；
图4为3的另一视角的结构示意图；
图5为图3的背视图；
图6为图3去掉第一弹性件和滑块的结构示意图。
图1-6中：
1护套、2棘轮、3解锁凸轮、31滑块控制槽、32中心孔、33安装孔、34第一凸块；4滑块、41滑块凸台、42外齿、51第一弹性件、52第二弹性件、6胀缩块、61配合槽、7中心轴、71扁形台阶、72配合段、8滑槽板、81滑槽、 82扇形凸台、83固定柱、84凸缘。
具体实施方式
为了使本领域的技术人员更好地理解本发明的技术方案，下面结合附图和具体实施例对本发明作进一步的详细说明。
请参考附图1-6，其中，图1为本发明所提供角度调节装置的爆炸图；图2为本发明所提供角度调节装置核心件的结构示意图；图3为图2的去掉滑槽板的结构示意图；图4为3的另一视角的结构示意图；图5为图3的背视图；图6为图3去掉第一弹性件和滑块的结构示意图。
在一种具体实施例中，本发明提供一种角度调节装置，如图1所示，该角度调节装置包括护套1、棘轮2和滑槽板8，其中，护套1用于将棘轮2和滑槽板8沿轴向相互固定，且棘轮2和滑槽板8能够相对转动，当该角度调节装置用于车辆座椅时，棘轮2与车辆座椅的椅背固定。
该角度调节装置还包括能够实现角度调节的核心件，该核心件包括解锁凸轮3和沿滑槽板8周向分布且设有外齿42的若干滑块4，其中，滑块4的外齿42能够与棘轮2的内齿啮合，且外齿42与内齿具有至少三种啮合关系，分别为：齿对齿(未啮合)状态、半啮合状态和完全啮合状态，当外齿42与内齿处于齿对齿状态时，该角度调节装置处于解锁状态，当外齿42与内齿处于完全啮合状态时，该角度调节装置处于锁定状态，当外齿42与内齿处于半啮合状态时，该角度调节装置为从解锁到锁定之间运动的过程。
对于图2-6来说，图2、图3和图6中顺时针方向为解锁方向，逆时针方向为锁止方向，由于图4和图5为图2、图3和图6的背视图，因此，其逆时针方向为解锁方向，顺时针方向为锁止方向。
同时，为了实现滑块4的外齿42与棘轮2的内齿之间的上述三个状态，滑块4需能够沿径向运动，且其沿径向向外运动时外齿42能够与棘轮2的内齿啮合，沿径向向内运动时外齿42能够与内齿解除啮合。为了实现滑块4的径向运动，该角度调节装置设置胀缩机构。
具体地，该胀缩机构包括若干胀缩块6，各胀缩块6沿滑槽板8的周向分布，且分别与各滑块4位于滑槽板8的同一直径方向，滑块4的内圈具有第一配合面，胀缩块6的外圈具有第二配合面，二者均为弧面，且弯曲方向相 反；或者第一配合面与第二配合面中，一者为平面，另一者为朝向另一者凸出的弧面，如图5所示的实施例中，胀缩块6的第二配合面为向外凸出的弧面，滑块4的第一配合面为平面。
相邻两胀缩块6之间具有处于压缩状态的第二弹性件52，该第二弹性件52用于驱动胀缩块6周向运动，从而改变其第二配合面与滑块4的第一配合面相抵的位置，以便驱动滑块4沿径向向外运动，进而实现滑块4的外齿42与棘轮2的内齿的啮合。
同时，解锁凸轮3开设有若干滑块控制槽31，该滑块控制槽31为弧形槽，同时，滑块4具有若干滑块凸台41，该滑块凸台41位于滑块控制槽31内，并能够相对于滑块控制槽31滑动。
锁止时，胀缩块6在第二弹性件52的作用下向锁止方向转动，转动过程中，能够驱动对应的滑块4沿径向向外伸出，直到外齿42与内齿完全啮合，达到锁止状态，此时，胀缩块6处于自锁位置。解锁时，外界扭矩驱动解锁凸轮3朝向解锁方向转动，第二弹性件52驱动胀缩块6离开自锁位置，滑块控制槽31转动过程中带动滑块4径向向内运动，直到外齿42与内齿完全脱离，达到解锁状态。
具体地，滑槽板8的中部具有凸缘84，各胀缩块6均匀分布于凸缘84的外周，且在第二弹性件52的驱动下，胀缩块6能够沿凸缘84的外周壁周向转动。该凸缘84可与滑槽板8一体成型，也可与滑槽板8固定连接，如图1所示的实施例中，凸缘84与滑槽板8为分体式结构，且二者具有相互适配的卡钩和卡槽，从而实现卡接固定。
进一步地，该滑槽板8具有若干与滑块4相适配的滑槽81，滑块4能够在对应的滑槽81内径向运动。具体地，滑槽板8具有若干沿周向均匀分布的扇形凸台82，相邻扇形凸台82之间形成上述滑槽81。
以上各实施例中，各第二弹性件52沿变形方向的两端分别与解锁凸轮3和胀缩块6相连。
如上所述，胀缩块6用于驱动滑块4沿径向伸出，以便实现滑块4与棘轮2的啮合，解锁凸轮3朝向解锁方向转动时，能够实现滑块4与棘轮2的分离。解锁时，需要外界提供解锁扭矩驱动解锁凸轮3朝向解锁方向转动，且只有该解锁扭矩达到一定数值时，才能够驱动解锁凸轮3克服锁止力朝向解 锁方向转动。
本发明中，当解锁凸轮3朝向图2-6中的解锁方向转动时，处于压缩状态、与解锁凸轮3和胀缩块6相连的第二弹性件52能够作用于解锁凸轮3与胀缩块6，且第二弹性件6对解锁凸轮3的弹性力朝向解锁方向(如图4所示的逆时针方向)，对胀缩块6的弹性力朝向锁止方向(如图4所示的顺时针方向)，因此，该第二弹性件6对解锁凸轮3朝向解锁方向的弹性力能够减小解锁时外界所需提供的作用于解锁凸轮3的解锁扭矩，从而使得该角度调节装置仅需较小的解锁扭矩即可实现解锁过程，提高解锁的舒适性。
同时，在锁止过程，上述解锁扭矩消失后，该第二弹性件52能够提供足够的弹性力，以驱动胀缩块6转动，从而保证锁止过程的可靠性，且锁止扭矩由第二弹性件52决定，能够任意设计其大小，当滑块4数量较多时，仍然具有较高的解锁舒适性和锁止可靠性。
进一步地，如图1-6所示，该角度调节装置还包括第一弹性件51，该第一弹性件51一端与滑槽板8相连，另一端直接或间接连接于解锁凸轮3，以便传递外界作用于解锁凸轮3的解锁扭矩。
如上所述，解锁时，驱动解锁凸轮3相对于滑槽板8转动，且该第一弹性件51能够传递外界作用于解锁凸轮3的解锁扭矩，因此，解锁凸轮3所需的解锁扭矩由第一弹性件51所传递的扭矩表征，同时，上述第二弹性件52对解锁凸轮2的弹性力能够减小第一弹性件51的所传递的扭矩，从而减小所需的解锁扭矩。
本实施例中，由于第一弹性件51和第二弹性件52均与解锁凸轮3相连(直接或间接相连)，且解锁过程中二者对解锁凸轮3的解锁力方向相反，从而能够减小外界所需提供的解锁力，进而提高解锁的舒适性。
进一步地，如图1所示，该角度调节装置还包括中心轴7，解锁凸轮3具有中心孔32，该中心孔32为具有弧段和直线段的扁形孔，中心轴7具有与该中心孔32相适配的扁形台阶71，该扁形台阶71与中心孔32为紧配合，从而使得外界手柄驱动中心轴7转动时，能够带动解锁凸轮3转动，且作用于中心轴7的解锁扭矩为外界手柄提供的扭矩，解锁凸轮3受到的扭矩(外界提供的扭矩)为第一弹性件51对解锁凸轮3的扭矩减去第二弹性件52对解锁凸轮3的扭矩。
具体地，该第一弹性件51连接于中心轴7，以便间接连接于解锁凸轮3。
本实施例中，将第一弹性件51通过中心轴7间接连接于解锁凸轮3具有节省核心件安装空间的优点，且使得第一弹性件51方便布置，不改变第二弹性件52的布置。
更具体地，如图1所示，该第一弹性件51为平面涡卷弹簧，该平面涡卷弹簧能够传递扭矩，且其内端固定于中心轴7，并能够随中心轴7转动，外端固定于滑槽板8。如图1所示，中心轴7具有配合段72，该配合段72的截面为方形，相应地，平面涡卷弹簧的内端形成方形孔，该方形孔外套于配合段72，从而实现平面涡卷弹簧与中心轴7之间的连接。
同时，滑槽板8的扇形凸台82设置有固定柱83，第一弹性件51的外端钩挂于该固定柱83，且中心轴7带动第一弹性件51的内端朝向解锁方向转动时，该固定柱83能够限制第一弹性件51外端的运动，因此，该平面涡卷弹簧外端固定，内端承受并传递扭矩。
当然，该第一弹性件51与滑槽板8之间的固定并非必须通过固定柱83实现，还可采用本领域的其它固定方式，例如焊接等。
以上各实施例中，如图4所示，解锁凸轮3具有若干朝向胀缩块6的方向延伸的第一凸块34，胀缩块6沿周向的侧壁部开设有配合槽61，第二弹性件52沿变形方向的两端分别与对应的第一凸块34和配合槽61相抵，从而实现第二弹性件52与解锁凸轮3和胀缩块52的连接。
具体地，如图5所示，该解锁凸轮3开设有若干安装孔33，该安装孔33用于角度调节装置各部件的安装，且该安装孔33的侧壁处设置有翻边，该翻边为上述第一凸块34。
当然，该第一凸块34也可为焊接于解锁凸轮3表面的结构。
在另一实施例中，胀缩块6具有朝向解锁凸轮3延伸的第二凸块，解锁凸轮3开设有凹槽，第二弹性件52沿变形方向的两端分别与第二凸块和凹槽的侧壁相抵，从而实现第二弹性件52与解锁凸轮3和胀缩块52的连接。
因此，本发明中，只要能够实现第二弹性件52与解锁凸轮3和胀缩块6相连即可，对三者的连接结构不作限定。
具体地，以上各实施例中，胀缩块6为楔形块。
需要说明的是，本发明中的角度调节装置可用于车辆座椅的椅背调 节，或者，也可用于其它结构上的相对角度调节。
进一步地，本发明还提供一种车辆座椅，包括椅座和椅背，还包括用于调节椅背相对于椅座角度的角度调节装置，其中，该角度调节装置为以上任一实施例中所述的角度调节装置。
由于该角度调节装置具有上述技术效果，包括该角度调节装置的车辆座椅也应具有相应的技术效果，此处不再赘述。
以上对本发明所提供的车辆座椅及其角度调节装置均进行了详细介绍。本文中应用了具体个例对本发明的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本发明的方法及其核心思想。应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明原理的前提下，还可以对本发明进行若干改进和修饰，这些改进和修饰也落入本发明权利要求的保护范围内。

Claims (10)

  1. 角度调节装置，包括解锁凸轮(3)、设有内齿的棘轮(2)、沿周向分布且设有外齿(42)的若干滑块(4)，还包括与所述滑块(4)对应设置的若干胀缩块(6)，所述胀缩块(6)能够驱动所述滑块(4)沿径向向外运动，以使所述内齿与所述外齿(42)啮合；其特征在于，相邻所述胀缩块(6)之间具有第二弹性件(52)，所述第二弹性件(52)沿变形方向的两端分别与所述解锁凸轮(3)和所述胀缩块(6)相连。
  2. 根据权利要求1所述的角度调节装置，其特征在于，还包括第一弹性件(51)和与所述棘轮(2)相对转动的滑槽板(8)，所述第一弹性件(51)一端与所述滑槽板(8)相连，另一端直接或间接连接于所述解锁凸轮(3)，以便传递所述解锁凸轮(3)的扭矩。
  3. 根据权利要求2所述的角度调节装置，其特征在于，进一步包括中心轴(7)，所述解锁凸轮(3)具有中心孔(32)，所述中心轴(7)与所述中心孔(32)相适配，且所述中心轴(7)沿解锁方向转动时能够带动所述解锁凸轮(3)沿解锁方向转动；
    所述第一弹性件(51)连接于所述中心轴(7)，以便间接连接于所述解锁凸轮(3)。
  4. 根据权利要求1所述的角度调节装置，其特征在于，所述解锁凸轮(3)具有若干第一凸块(34)，所述胀缩块(6)开设有配合槽(61)，所述第二弹性件(52)沿变形方向的两端分别与对应的所述第一凸块(34)和所述配合槽(61)相抵。
  5. 根据权利要求4所述的角度调节装置，其特征在于，所述解锁凸轮(3)开设有若干安装孔(33)，所述安装孔(33)的侧壁处设置有翻边，所述翻边为所述第一凸块(34)。
  6. 根据权利要求1所述的角度调节装置，其特征在于，所述胀缩块(6)具有第二凸块，所述解锁凸轮(3)开设有凹槽，所述第二弹性件(52)沿变形方向的两端分别与所述第二凸块和所述凹槽的侧壁相抵。
  7. 根据权利要求3-6中任一项所述的角度调节装置，其特征在于，所述第一弹性件(51)为平面涡卷弹簧，且其外端固定于所述滑槽板(8)， 内端固定于所述中心轴(7)，以便传递所述中心轴(7)的扭矩。
  8. 根据权利要求7所述的角度调节装置，其特征在于，所述滑槽板(8)设置有固定柱(83)，所述第一弹性件(51)的外端钩挂于所述固定柱(83)，且所述中心轴(7)带动所述第一弹性件(51)的内端朝向解锁方向转动时，所述固定柱(83)能够限制所述第一弹性件(51)的外端运动。
  9. 根据权利要求2-6中任一项所述的角度调节装置，其特征在于，所述滑槽板(8)中部具有凸缘(84)，所述胀缩块(6)能够沿所述凸缘(84)的外周面运动；
    所述凸缘(84)与所述滑槽板(8)一体成型，或者所述凸缘(84)与所述滑槽板(8)固定连接。
  10. 车辆座椅，包括椅座和椅背，还包括用于调节所述椅背相对于所述椅座角度的角度调节装置，其特征在于，所述角度调节装置为权利要求1-9中任一项所述的角度调节装置。
PCT/CN2018/098499 2018-07-20 2018-08-03 车辆座椅及其角度调节装置 WO2020015024A1 (zh)

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