WO2012100729A1 - Seat angle adjuster and self-locking mechanism thereof, and seat with the angle adjuster - Google Patents

Seat angle adjuster and self-locking mechanism thereof, and seat with the angle adjuster Download PDF

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Publication number
WO2012100729A1
WO2012100729A1 PCT/CN2012/070645 CN2012070645W WO2012100729A1 WO 2012100729 A1 WO2012100729 A1 WO 2012100729A1 CN 2012070645 W CN2012070645 W CN 2012070645W WO 2012100729 A1 WO2012100729 A1 WO 2012100729A1
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WO
WIPO (PCT)
Prior art keywords
wedge
seat
self
radial
axial
Prior art date
Application number
PCT/CN2012/070645
Other languages
French (fr)
Chinese (zh)
Inventor
江冲
黄兴
涂先勇
陈婕
雷自力
Original Assignee
湖北中航精机科技股份有限公司
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Publication date
Application filed by 湖北中航精机科技股份有限公司 filed Critical 湖北中航精机科技股份有限公司
Publication of WO2012100729A1 publication Critical patent/WO2012100729A1/en

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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
    • B60N2/02—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
    • B60N2/225—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 cycloidal or planetary mechanisms
    • B60N2/2254—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 cycloidal or planetary mechanisms provided with braking systems

Definitions

  • the present invention relates to a seat recliner technology, and in particular to a seat recliner and a self-locking mechanism thereof and a seat having the same.
  • the seat angle adjuster is used to connect the seat and backrest of the car seat to enhance the comfort of the seat. Passengers can adjust the angle of the backrest to the best position through the seat recliner for the most comfortable and habitual seating angle; especially for the driver, the best view is achieved by adjusting the angle of the backrest, while the steering wheel is easy to operate. Controls such as pedals and shift levers.
  • seat angle adjusters can be roughly divided into two categories: one is a leaf spring type adjustment mechanism using a ratchet pawl mechanism principle; the other is a gear type seat angle adjuster using a planetary gear transmission principle.
  • the gear seat angle adjuster can realize the stepless adjustment of the backrest angle, and the backrest can stay at any angle.
  • the transmission part adopts the planetary gear transmission principle and is not limited by the structure
  • the seat angle adjuster faces a problem that the backrest angle locks down, that is, a rearward load is applied to the backrest. At this time, the backrest will rotate backward, and the angle adjustment mechanism itself cannot prevent the backrest from rotating, thereby causing problems of safety and comfort.
  • the backrest may suddenly collapse backwards and the seat loses its safety protection function; for example, during driving, since the rearward load is always applied to the backrest, the backrest gradually The backward rotation is offset from the original angle, so that the driver needs to constantly adjust the backrest to maintain a proper backrest angle, which affects comfort.
  • the prior art provides a self-locking mechanism using a tension spring self-locking on the outside of the seat angle adjuster, the self-locking mechanism makes the power only from the jib wheel Passing to the planet wheels, but not from the planet wheels to the arm wheels, can be effective The tendency to prevent the backrest from rotating abnormally backwards.
  • the self-locking mechanism since the necessary frictional force is always present between the tension spring and the housing, the self-locking mechanism has additional operating torque, thereby increasing the actual operating torque of the entire adjusting mechanism; and tightening the spring during operation The noise generated by the friction between the housings affects the operational comfort.
  • the technical problem to be solved by the present invention is to provide a seat recliner self-locking mechanism, which can effectively control the operating torque of the angle adjusting mechanism through the optimized design of the structure, and can minimize the working noise. Greatly improved operating comfort.
  • the present invention also provides a seat recliner having the self-locking mechanism and a seat having the recliner.
  • the seat recliner self-locking mechanism comprises a fixedly disposed housing and a drive shaft, a locking cam and at least two sets of wedge assemblies disposed in the housing; wherein one end of the drive shaft is inserted Mounted in the inner cavity of the housing; the end of the locking cam axially opposite the drive shaft has at least two radial bosses, and a wedge surface between adjacent radial bosses Forming a wedge region with the housing; the other end is for driving the driving component of the seat angle adjustment mechanism to rotate; the at least two sets of wedge assemblies are respectively disposed in cooperation with the corresponding radial bosses;
  • the group wedge assembly includes two wedges circumferentially symmetrically disposed in the wedging region on both sides of the radial boss, the large ends of the two wedges being opposite and with elastic members disposed therebetween;
  • the drive shaft and the opposite end of the locking cam have at least two axial bosses, each of the axial bosses being inserted between adjacent wedges of two adjacent wedge assemblies; a mat
  • a mating surface of the radial boss with the wedge and/or a mating surface of the wedge with the radial boss forms a clip between the radial direction An angle, the pressure of the radial boss against the wedge acting on the wedge has a radially inward component.
  • the locking cam and the opposite ends of the drive shaft are respectively provided with matching shoulders and dimples in the axial direction.
  • the curvature of the wedge-shaped curved surface changes gradually from the root of the two radial projections to the middle of the wedge-shaped curved surface.
  • the angle of elevation of the wedged surface relative to the center of the inner diameter of the housing is less than the angle of friction between the inner surface of the wedge and the wedged surface.
  • three contact points are formed between the wedge and the wedge-shaped curved surface and the housing, and the connection between the single-point side contact point and the center of the housing is located on the two-point side. Between the points.
  • each of said contact points is in the same radial direction as the center of the two mating arcs forming the contact points.
  • both ends of the wedge have outward convex arc faces for respectively in-line contact with the axial boss of the drive shaft and the radial boss of the locking cam.
  • the seat recliner provided by the invention comprises a seat reclining mechanism disposed between the seat back and the seat, and further comprises a seat recliner self-locking mechanism as described above, the locking cam and the seat The driving components of the seat angle adjustment mechanism are connected.
  • the seat provided by the present invention has a backrest that is rotatable relative to the seat, and a seat recliner as described above is disposed between the backrest and the seat.
  • the seat recliner self-locking mechanism in contrast to the prior art, establishes a locking relationship between the housing and the locking cam via the wedge assembly.
  • the wedge forms a wedge-tangential rotation tendency from the large end to the small end, and is radially wedged with the housing and the locking cam, so that the locking cam is locked, that is, The driving part of the angle adjusting mechanism is locked by the limitation of the locking cam.
  • the elastic component of the present scheme since the elastic component of the present scheme only needs to provide a small initial wedge force during the wedge tightening process, the wedge and the inner diameter of the casing during the locking process and the aforementioned unlocking phase.
  • the frictional force is small, on the one hand, the working noise generated between the relatively moving members is greatly reduced, and on the other hand, the additional torque generated by the self-locking mechanism can be effectively controlled.
  • the wedge and the locking cam are radially slid in the aforementioned adjustment stage, the wedge is radially disengaged from the housing, and obviously, theoretically, no operational noise is generated between the members in the process. , thereby minimizing the possibility of noise generated by the entire self-locking mechanism.
  • the mating surface of the radial boss of the locking cam with the wedge and/or the mating surface of the wedge and the radial boss form an angle with the radial direction, and the radial convex
  • the pressure acting on the wedge against the wedge has a radially inward component.
  • the angle of elevation of the wedged surface of the locking cam relative to the center of the inner diameter of the housing is less than the angle of friction between the inner surface of the wedge and the wedged surface.
  • each contact point is in the same radial direction as the center of the two mating arcs forming the contact point, and is designed to ensure that the contact point is at a dead center position, so that the locking cam Locked more reliably.
  • three contact points are formed between the wedge and the wedged curved surface and the housing, and the connection between the contact point on the single-point side and the center of the housing is located at the two contact points on the two-point side. In this way, the wedge-tight state is made more reliable, and the working stability of the self-locking mechanism is improved.
  • FIG. 1 is a schematic view showing the overall structure of a seat according to a specific embodiment; an exploded view of an assembly relationship between the two;
  • Figure 3 is a schematic view showing the assembly relationship between the angle adjusting mechanism and the self-locking mechanism shown in Figure 2;
  • Figure 4 is a half cross-sectional view of the self-locking mechanism shown in the direction A in Figure 3;
  • Figure 5 is a cross-sectional view taken along line B - B of Figure 4.
  • Figure 6 is a cross-sectional view taken along line C - C shown in Figure 5;
  • FIG. 7 and 8 are schematic exploded views of the self-locking mechanism formed from different angles, respectively;
  • FIG. 9 is a schematic view showing a state in which the wedge and the radial bump are in contact with each other in the specific embodiment;
  • FIG. Figure 12 shows the relationship between the wedge and the housing, the wedge-shaped curved surface, the radial projection and the axial projection, respectively, in the second, third and fourth embodiments, each of which is partially enlarged in part I of Figure 4 Figure.
  • Housing 1 through hole 11, inner surface 12, drive shaft 2, body 21, recess 22, axial boss 23, mating surface 24, wedge 3, outer curved surface 31, mating surface 32, inner curved surface 33 , mating surface 34 , large end 35 , convex curved surface 36 , elastic member 4 , locking cam 5 , shoulder 51 , wedge curved surface 52 , radial projection 53 , spline shaft 54 , mating surface 55 , end surface 56 , gasket 6.
  • the core of the invention is to provide a seat recliner self-locking mechanism, which can effectively control the operating torque of the angle adjusting mechanism and minimize the working noise on the basis of the seat back angle adjustment and locking.
  • the present invention does not provide a seat recliner having the self-locking mechanism and a seat having the recliner.
  • FIG. 1 shows a schematic overall structure of the seat according to the embodiment.
  • the backrest 20 of the seat 10 is rotatable relative to the seat 30, and
  • a seat recliner 40 is disposed between the backrest 20 and the seat 30.
  • the seat recliner 40 includes two independent functional mechanisms of the seat reclining mechanism 50 and the self-locking mechanism 60.
  • FIG. 2 is the angle adjusting mechanism of the seat recliner. Explosion diagram of the assembly relationship with the self-locking mechanism.
  • the seat angle adjusting mechanism 50 adopts the planetary gear transmission principle, and the rotation of the backrest 20 relative to the seat 30 is realized by driving the driving member 501 to rotate, thereby realizing manual stepless adjustment of the seat back angle, please refer to the figure. 3, the figure is a schematic diagram of the assembly relationship between the angle adjusting mechanism and the self-locking mechanism shown in FIG. 2. It should be noted that the specific configuration and connection relationship of the seat angle adjusting mechanism 50 are not the invention of the present application, and therefore will not be described herein. The invention of the present application will be described in detail below with reference to the accompanying drawings: Self-locking mechanism of the seat recliner.
  • the medial and lateral orientation words described herein are defined on the basis of the axis line of the self-locking mechanism, that is, the inner side close to the axis line is the inner side, and the side away from the axial line side is the outer side, it should be understood that The use of the foregoing orientation words should not be limited by the scope of the claimed invention.
  • FIG. 4 is a half cross-sectional view of the self-locking mechanism 60 shown in the direction of A in FIG. 3, and FIG. 5 is a cross-sectional view taken along line B-B of FIG.
  • the seat recliner self-locking mechanism 60 includes a fixed housing 1 and a drive shaft 2, a locking cam 5, and two sets of wedge assemblies disposed within the housing 1. Wherein, one end of the drive shaft 2 is inserted into the inner cavity of the housing 1, and the other end is placed outside the housing 1 for connection with the hand wheel 70.
  • the locking cam 5 is disposed axially opposite to the drive shaft 2, and has two radial bosses 53 at one end thereof; a wedge between the wedge-shaped curved surface 52 between the adjacent two radial bosses 53 and the housing 1 Tight area to accommodate the wedge.
  • the other end of the locking cam 5 is extended by the housing 1 and connected to the driving member 501 of the seat angle adjusting mechanism 50 to provide an angularly adjusted driving force; and the locking member 5 is adapted to the driving member 501.
  • the mating end is a spline shaft 54.
  • Figure 6, is a C-C cross-sectional view shown in Figure 5.
  • each set of wedge assemblies comprises two wedges 3 placed in the wedge region and circumferentially symmetrically disposed on opposite sides of the radial boss 53; the large ends 35 of the two wedges 3 are oppositely disposed, and both An elastic member 4 is provided between them.
  • the wedge 3 forms a wedge-tangential turn from the large end to the small end.
  • the elastic member 4 in the present embodiment only needs to provide a small force during the wedge tightening process.
  • the opposite ends of the drive shaft 2 and the locking cam 5 have two axial bosses 23, each of which is axially bossed
  • each axial boss 23 is interposed between two adjacent wedges of the adjacent two sets of wedge assemblies; and may also be set to be asymmetric, it should be understood that as long as the requirements for use are met Within the scope of the claimed application.
  • the two sets of component symmetrical design on the one hand has a better processability, on the one hand, the force is more balanced and force, easy to obtain better mechanical operation reliability.
  • the mating surface 24 of the axial boss 23 on the drive shaft 2 with the wedge 3 forms an angle with the radial direction, and the axial projection of the wedge 3
  • the mating face 32 of the 23 also forms an angle with the radial direction, so that when the axial boss 23 abuts the wedge 3, the pressure acting on the wedge 3 has a radially inward component;
  • the block 3 keeps the outer peripheral surface 31 of the wedge 3 from the inner surface 12 of the casing 1 during the tangential rotation of the wedge-shaped curved surface 52 of the locking cam 5.
  • the mating surface 24 of the axial projection 23 with the wedge 3 forms an angle with the radial direction
  • the mating surface 32 of the wedge 3 with the axial projection 23 is also An angle is formed with the radial direction, either of which may form the aforementioned radially inward component.
  • the coexistence of the two increases the radially inward component of the wedge 3, causing the wedge 3 to quickly disengage from the housing 1.
  • the mating surface 55 of the radial boss 53 of the locking cam 5 with the wedge 3 forms an angle with the radial direction
  • the wedge 3 The mating surface 34 of the radial boss 53 forms an angle with the radial direction.
  • the curvature of the wedge-shaped curved surface 52 changes gradually from the root of the two radial projections 53 toward the middle of the wedge-shaped curved surface 52, further ensuring the lock is realized.
  • the locking cam 5 is reliably locked.
  • the elastic member of the present solution since the elastic member of the present solution only needs to provide a small force of 4 , the friction between the wedge 3 and the inner surface of the casing 2 is small, and on the one hand, the relative moving members are greatly reduced.
  • the generated working noise on the other hand, can effectively control the additional torque generated by the self-locking mechanism.
  • the wedge 3 since the wedge 3 is radially detached from the locking cam 5 in the aforementioned adjustment stage, the wedge 3 is radially disengaged from the housing 1, and no operational noise is generated between the members in the process. Minimize the possibility of noise generated by the entire self-locking mechanism.
  • the housing 1 may be formed by a stamping process while forming a tumbling structure at the center of the projecting side of the drive shaft 2, as shown in Fig. 5, the boring hole 11 has a certain axial length to carry the body 21 of the drive shaft 2. And reliable radial positioning.
  • the opposite ends of the locking cam 5 and the drive shaft 2 are respectively provided with matching shoulders and recesses in the axial direction for realizing the positioning of the other end of the drive shaft 2, specifically the locking cam shown in the drawing. 5 end shoulder 51 and recess 22 at the end of drive shaft 2, it should be understood that the mating shoulders and recesses described above may also be reversed.
  • the mating surface of each component can be further optimized.
  • the following is a detailed description of the different coordination relationships.
  • the angle of elevation of the wedged curved surface 52 relative to the center of the inner diameter of the housing 1 is less than the angle of friction between the inner surface of the wedge 3 and the wedged curved surface 52.
  • the contact pair between the wedge 3 and the wedged curved surface 52 and the casing 1 must be rationally designed.
  • the wedged curved surface 52 is in contact with two points (a, b) of the inner curved surface 33 of the wedge 23 (the inner curved surface 33 is concave in the middle), and the a and b segments of the inner curved surface 33 of the wedge 3
  • the radius is slightly larger than the radius of the arc of the wedge surface 52; the line between the contact point (c) of the casing 1 and the wedge 3 and the center of the casing 1 is located at the inner curved surface 33 of the wedge surface 52 and the wedge 3.
  • the radius of the outer curved surface 31 of the wedge 3 is slightly smaller than the radius of the inner surface 12 of the casing 1. So designed, the wedge 3 forms three contact points with the wedge surface 52 and the housing 1, and the contact points on the single point side are located on the two-point side with the line between (c) and the center of the housing. Between the contact points (a, b), the locking of the locking cam 5 is more reliable.
  • each contact point is in the same radial direction as the center of the two mating arcs forming the contact point; that is, the inner arc surface 33 at the a point and the arc center of the wedge surface 52 and The contact points are in the same radial direction, the inner arc surface 33 at point b and the arc center of the wedge surface 52 are in the same radial direction as the b contact point, and the inner surface of the housing 1 and the outer curved surface 31 at point c The center of the arc is in the same radial direction as the point of contact with c.
  • both ends of the wedge 3 have a convex arc surface, that is, the small end is a convex arc surface 36, and the large end mating surface 34 is also an outer convex arc surface, which is respectively used for the axial boss with the drive shaft 2.
  • 23 and the radial boss 53 of the locking cam 5 are in line contact with each other to improve the flexibility and reliability of the mechanism.
  • the outer convex arcs for realizing the above-mentioned line contact fit can be respectively disposed at the mating surface 24 of the axial boss 24 and the mating surface 55 of the radial boss 53, as shown in FIG.
  • This illustration is a partial schematic view of the book mating structure described above.
  • the main difference between the third embodiment and the first embodiment is that, in the axial projection plane, the housing 1 is in contact with the inner arc surface 33 of the wedge 3 at two points (d, e), and the wedge is tight.
  • the line between the contact point (f) of the curved surface 52 and the wedge 3 and the center of the casing 1 is located between the two contact points of the inner side arc surface 33 of the casing 1 and the wedge 3 (d, e).
  • the main difference between the fourth embodiment and the first embodiment is that, in the axial projection plane, the housing 1 is in single contact with the inner arc surface 33 of the wedge 3 (g), and the wedge surface 52 is wedged. With wedge 3 Single point contact (h), and the lines of the two contact points (g, h) are in the same radial direction.
  • the angle adjusting mechanism 50 and the self-locking mechanism 60 may be of a one-piece design, or may be a split type design as shown in the drawing, that is, the self-locking mechanism 60 has a separate housing, and between the internal components. Form the independent necessary radial, axial assembly dimension chain.
  • the spline shaft 54 of the locking cam 5 passes through the inner hole of the spacer 6; the spacer 6 is loosely fitted with the inner surface 12 of the housing 1, and is fitted to the end surface 56 of the locking cam 5, and the wedge 3
  • the small gap fits and is in contact with the elastic member 4.

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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

A seat angle adjuster self-locking mechanism (60). One end of a locking cam (5) in a casing (1) of the mechanism axially opposite to a driving shaft (2) has at least two radial bosses (53), and a chocking region is formed between a chocking curved surface (52) between the adjacent radial bosses (53) and the casing (1). The other end of the locking cam (5) is used to drive a driving member (501) of a seat angle adjuster mechanism to rotate. Each group of wedge block components comprises two wedge blocks (3) circumferentially and symmetrically disposed in the chocking region at two sides of the radial boss (53), and big ends (35) of the two wedge blocks (3) are opposite to each other with an elastic member (4) disposed there-between. An end of the driving shaft (2) opposite to the locking cam (5) has at least two axial bosses (23), and each axial boss (23) is inserted between the adjacent wedge blocks (3) of the two adjacent groups of wedge block components. An angle is formed by a fitting surface (24) of the axial bosses (23) and the wedge blocks (3) and/or a fitting surface (34) of the wedge blocks (3) and the axial bosses (23) in a radial direction. Also disclosed are a seat angle adjuster with the self-locking mechanism and a seat using the same. Through the present invention, self-locking and control of operating torque of an angle adjuster mechanism can be effectively provided, and work noise can be reduced to the minimum.

Description

座椅调角器及其自锁机构及具有该调角器的座椅 本申请要求于 2011 年 1 月 27 日提交中国专利局、 申请号为 201110030146.7、 发明名称为"座椅调角器及其自锁机构及具有该调角器的 座椅"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  Seat recliner and self-locking mechanism thereof and seat having the same. The application is filed on January 27, 2011, the Chinese Patent Office, the application number is 201110030146.7, and the invention name is "seat angle adjuster" The priority of the Chinese patent application of the self-locking mechanism and the seat having the recliner is incorporated herein by reference in its entirety. Technical field
本发明涉及一种座椅调角器技术， 具体涉及一种座椅调角器及其自锁 机构及具有该调角器的座椅。  The present invention relates to a seat recliner technology, and in particular to a seat recliner and a self-locking mechanism thereof and a seat having the same.
背景技术 Background technique
座椅角度调节器用于连接汽车座椅的椅座和靠背， 以增强座椅的舒适 性。 乘客可以通过座椅调角器调节靠背的角度至最佳位置， 获得最舒适和 最习惯的乘坐角度； 特别是对于驾驶员来说， 通过调节靠背的角度获得最 好的视野， 同时易于操纵方向盘、 踏板和变速杆等操纵件。  The seat angle adjuster is used to connect the seat and backrest of the car seat to enhance the comfort of the seat. Passengers can adjust the angle of the backrest to the best position through the seat recliner for the most comfortable and habitual seating angle; especially for the driver, the best view is achieved by adjusting the angle of the backrest, while the steering wheel is easy to operate. Controls such as pedals and shift levers.
目前， 座椅角度调节器大致可以分为两大类： 一类是采用棘轮棘爪机 构原理的板簧式调节机构； 另一类是采用行星齿轮传动原理的齿轮式座椅 角度调节器。  At present, seat angle adjusters can be roughly divided into two categories: one is a leaf spring type adjustment mechanism using a ratchet pawl mechanism principle; the other is a gear type seat angle adjuster using a planetary gear transmission principle.
其中， 齿轮式座椅角度调节器可以实现靠背角度的无级调节， 靠背可 以停留在任意角度。 但是由于传动部分采用的是行星齿轮传动原理， 受结 构限制不具备自锁功能， 因此此类座椅角度调节器面临着一个靠背角度锁 止失效的问题， 即： 在靠背上施加向后的载荷时， 靠背将向后转动， 而角 度调节机构自身亦无法阻止靠背转动， 由此就会带来安全性、 舒适性的问 题。 比如， 若在汽车行驶过程中受到剧烈的后撞时， 靠背可能将突然向后 倒塌， 座椅失去安全保护功能； 再比如， 在驾驶过程中， 由于始终对靠背 施加向后的载荷， 靠背逐渐向后转动偏离原来的角度， 这样， 驾驶员需要 不停的调节靠背以保持合适的靠背角度， 影响舒适性。  Among them, the gear seat angle adjuster can realize the stepless adjustment of the backrest angle, and the backrest can stay at any angle. However, since the transmission part adopts the planetary gear transmission principle and is not limited by the structure, the seat angle adjuster faces a problem that the backrest angle locks down, that is, a rearward load is applied to the backrest. At this time, the backrest will rotate backward, and the angle adjustment mechanism itself cannot prevent the backrest from rotating, thereby causing problems of safety and comfort. For example, if a heavy backlash is encountered while the car is running, the backrest may suddenly collapse backwards and the seat loses its safety protection function; for example, during driving, since the rearward load is always applied to the backrest, the backrest gradually The backward rotation is offset from the original angle, so that the driver needs to constantly adjust the backrest to maintain a proper backrest angle, which affects comfort.
为了解决上述齿轮式座椅角度调节器的不足， 现有技术在座椅角度调 节器的外部设置一个采用涨紧弹簧摩擦自锁的自锁机构， 该自锁机构使得 动力只能从转臂轮向行星轮传递， 而不能从行星轮向转臂轮传递， 可有效 阻止靠背向后非正常转动的趋势。 然而， 由于该涨紧弹簧与壳体之间始终 存在必要的摩擦力， 使得自锁机构存在附加的操作扭矩， 进而增大了整个 调节机构的实际操作扭矩； 且在操作过程中涨紧弹簧与壳体之间摩擦产生 的噪音， 影响操作舒适性。 In order to solve the above-mentioned deficiencies of the gear type seat angle adjuster, the prior art provides a self-locking mechanism using a tension spring self-locking on the outside of the seat angle adjuster, the self-locking mechanism makes the power only from the jib wheel Passing to the planet wheels, but not from the planet wheels to the arm wheels, can be effective The tendency to prevent the backrest from rotating abnormally backwards. However, since the necessary frictional force is always present between the tension spring and the housing, the self-locking mechanism has additional operating torque, thereby increasing the actual operating torque of the entire adjusting mechanism; and tightening the spring during operation The noise generated by the friction between the housings affects the operational comfort.
有鉴于此， 亟待针对现有技术中的齿轮式座椅调角器的自锁机构进行 优化设计， 以有效控制调角机构的操作扭矩， 避免工作噪音影响操作的舒 适性。 发明内容  In view of this, it is urgent to optimize the design of the self-locking mechanism of the prior art gear seat recliner to effectively control the operating torque of the angle adjusting mechanism, and to avoid the operational noise affecting the operational comfort. Summary of the invention
针对上述缺陷， 本发明解决的技术问题在于， 提供一种座椅调角器自 锁机构， 该方案通过结构的优化设计可有效控制调角机构的操作扭矩， 并 可将工作噪声降至最低， 大大提高了操作舒适性。 在此基础上， 本发明还 提供一种具有该自锁机构的座椅调角器和具有该调角器的座椅。  In view of the above drawbacks, the technical problem to be solved by the present invention is to provide a seat recliner self-locking mechanism, which can effectively control the operating torque of the angle adjusting mechanism through the optimized design of the structure, and can minimize the working noise. Greatly improved operating comfort. Based on this, the present invention also provides a seat recliner having the self-locking mechanism and a seat having the recliner.
本发明提供的座椅调角器自锁机构， 包括固定设置的壳体以及置于所 述壳体内的驱动轴、 锁紧凸轮和至少两组楔块组件； 其中， 所述驱动轴的 一端插装于所述壳体的内腔中； 所述锁紧凸轮与所述驱动轴轴向相对的一 端具有至少两个径向凸台， 且相邻所述径向凸台之间的楔紧曲面与所述壳 体之间形成楔紧区域； 其另一端用于驱动座椅调角机构的驱动部件转动； 所述至少两组楔块组件分别与相应的所述径向凸台配合设置； 每组楔块组 件包括周向对称设置在所述径向凸台两侧楔紧区域内的两个楔块， 两个所 述楔块的大端相对且两者之间设置有弹性部件； 且所述驱动轴与所述锁紧 凸轮的相对端具有至少两个轴向凸台， 每个所述轴向凸台插装于相邻两组 楔块组件的相邻楔块之间； 且在轴向投影面内， 所述轴向凸台的与所述楔 块的配合面和 /或所述楔块的与所述轴向凸台的配合面与径向之间形成夹 角， 所述轴向凸台与所述楔块相抵作用于所述楔块上的压力具有径向向内 的分力。  The seat recliner self-locking mechanism provided by the present invention comprises a fixedly disposed housing and a drive shaft, a locking cam and at least two sets of wedge assemblies disposed in the housing; wherein one end of the drive shaft is inserted Mounted in the inner cavity of the housing; the end of the locking cam axially opposite the drive shaft has at least two radial bosses, and a wedge surface between adjacent radial bosses Forming a wedge region with the housing; the other end is for driving the driving component of the seat angle adjustment mechanism to rotate; the at least two sets of wedge assemblies are respectively disposed in cooperation with the corresponding radial bosses; The group wedge assembly includes two wedges circumferentially symmetrically disposed in the wedging region on both sides of the radial boss, the large ends of the two wedges being opposite and with elastic members disposed therebetween; The drive shaft and the opposite end of the locking cam have at least two axial bosses, each of the axial bosses being inserted between adjacent wedges of two adjacent wedge assemblies; a mating surface of the axial boss with the wedge and/or An angle formed between a mating surface of the wedge and the axial boss and a radial direction, and a pressure of the axial boss against the wedge acting on the wedge has a radially inward direction The force.
优选地， 在轴向投影面内， 所述径向凸台的与所述楔块的配合面和 / 或所述楔块的与所述径向凸台的配合面与径向之间形成夹角， 所述径向凸 台与所述楔块相抵作用于所述楔块上的压力具有径向向内的分力。 优选地， 所述锁紧凸轮和所述驱动轴的相对端分别沿轴向设置有相适 配的轴肩和凹坑。 Preferably, in the axial projection plane, a mating surface of the radial boss with the wedge and/or a mating surface of the wedge with the radial boss forms a clip between the radial direction An angle, the pressure of the radial boss against the wedge acting on the wedge has a radially inward component. Preferably, the locking cam and the opposite ends of the drive shaft are respectively provided with matching shoulders and dimples in the axial direction.
优选地， 在轴向投影面内， 所述楔紧曲面的曲率自两个所述径向凸台 的根部向所述楔紧曲面的中部呈逐渐变小的趋势变化。  Preferably, in the axial projection plane, the curvature of the wedge-shaped curved surface changes gradually from the root of the two radial projections to the middle of the wedge-shaped curved surface.
优选地， 所述楔紧曲面相对于所述壳体的内径中心的升角小于所述楔 块的内表面与所述楔紧曲面之间的摩擦角。  Preferably, the angle of elevation of the wedged surface relative to the center of the inner diameter of the housing is less than the angle of friction between the inner surface of the wedge and the wedged surface.
优选地， 在轴向投影面内， 楔块与楔紧曲面和壳体之间形成三个接触 点，单点侧的接触点与壳体中心之间的连线位于双点侧的两个接触点之间。  Preferably, in the axial projection plane, three contact points are formed between the wedge and the wedge-shaped curved surface and the housing, and the connection between the single-point side contact point and the center of the housing is located on the two-point side. Between the points.
优选地， 每个所述接触点与形成接触点的两个配合圓弧的圓心均在同 一径向方向。  Preferably, each of said contact points is in the same radial direction as the center of the two mating arcs forming the contact points.
优选地， 所述楔块的两端均具有外凸弧面， 分别用于与所述驱动轴的 轴向凸台和所述锁紧凸轮的径向凸台线接触配合。  Preferably, both ends of the wedge have outward convex arc faces for respectively in-line contact with the axial boss of the drive shaft and the radial boss of the locking cam.
本发明提供的座椅调角器， 包括设置在座椅靠背和椅座之间的座椅调 角机构， 还包括如前所述座椅调角器自锁机构， 所述锁紧凸轮与所述座椅 调角机构的驱动部件连接。  The seat recliner provided by the invention comprises a seat reclining mechanism disposed between the seat back and the seat, and further comprises a seat recliner self-locking mechanism as described above, the locking cam and the seat The driving components of the seat angle adjustment mechanism are connected.
本发明提供的座椅， 其靠背可相对于椅座转动， 在所述靠背和椅座之 间设置有如前所述的座椅调角器。  The seat provided by the present invention has a backrest that is rotatable relative to the seat, and a seat recliner as described above is disposed between the backrest and the seat.
与现有技术相比， 本发明提供的座椅调角器自锁机构通过楔块组件在 壳体与锁紧凸轮之间建立锁止关系。 非调节状态下， 在弹性部件的作用下 楔块从大端向小端形成楔紧切向转动趋势， 与壳体和所述锁紧凸轮径向楔 紧， 使得锁紧凸轮被锁住， 即， 调角机构的驱动部件受锁紧凸轮的限制实 现锁止。  In contrast to the prior art, the seat recliner self-locking mechanism provided by the present invention establishes a locking relationship between the housing and the locking cam via the wedge assembly. In the unadjusted state, under the action of the elastic member, the wedge forms a wedge-tangential rotation tendency from the large end to the small end, and is radially wedged with the housing and the locking cam, so that the locking cam is locked, that is, The driving part of the angle adjusting mechanism is locked by the limitation of the locking cam.
调节状态下， 当操作者转动驱动轴时， 该驱动轴上轴向伸出的凸台推 动楔块从小端向大端切向转动， 楔块与壳体和锁紧凸轮之间存在径向间隙 实现解锁。 此过程为解锁阶段。  In the adjusted state, when the operator rotates the drive shaft, the axially extending projection on the drive shaft pushes the wedge to tangentially rotate from the small end to the large end, and there is a radial gap between the wedge and the housing and the locking cam. Achieve unlocking. This process is the unlock phase.
当楔块转动至其大端与锁紧凸轮径向伸出的凸块相抵后， 楔块推动锁 紧凸轮转动进而驱动调角机构的驱动部件转动， 座椅角度调角结构正常调 节， 使靠背调节到合适的角度。 此过程为调节阶段。 与此同时， 由于轴向 凸台与楔块相抵作用于楔块上的压力具有径向向内的分力， 从而使得使楔 块在紧贴在锁紧凸轮的楔紧曲面进行切向转动， 保持楔块的外周表面与壳 体内表面脱离。 When the wedge rotates until the big end thereof abuts the projection protruding radially from the locking cam, the wedge pushes the locking cam to rotate to drive the driving component of the angle adjustment mechanism to rotate, and the seat angle adjustment structure is normally adjusted, so that the backrest Adjust to the right angle. This process is the adjustment phase. At the same time, since the axial projection and the wedge abut against the wedge, the pressure on the wedge has a radially inward component, thereby causing the wedge The block is tangentially rotated in a wedge-shaped curved surface that abuts against the locking cam to keep the outer peripheral surface of the wedge disengaged from the inner surface of the housing.
基于上述工作原理的分析可知， 由于本方案的弹性部件在楔紧过程中 只需要提供很小的初始楔紧动力力， 因此， 在锁止过程中及前述解锁阶段 中， 楔块与壳体内径的摩擦力较小， 一方面大大减少了相对运动构件之间 所产生的工作噪声， 另一方面可有效控制自锁机构产生的附加扭矩。 此外， 由于在前述调节阶段， 楔块与锁紧凸轮之间径向贴合， 楔块与壳体之间径 向脱离， 显然， 理论上来说， 此过程中上述构件之间不会产生工作噪声， 从而将整个自锁机构产生噪音的可能性降至最低。  Based on the analysis of the above working principle, since the elastic component of the present scheme only needs to provide a small initial wedge force during the wedge tightening process, the wedge and the inner diameter of the casing during the locking process and the aforementioned unlocking phase. The frictional force is small, on the one hand, the working noise generated between the relatively moving members is greatly reduced, and on the other hand, the additional torque generated by the self-locking mechanism can be effectively controlled. In addition, since the wedge and the locking cam are radially slid in the aforementioned adjustment stage, the wedge is radially disengaged from the housing, and obviously, theoretically, no operational noise is generated between the members in the process. , thereby minimizing the possibility of noise generated by the entire self-locking mechanism.
在本发明的优选方案中， 锁紧凸轮的径向凸台的与楔块的配合面和 / 或楔块的与径向凸台的配合面均与径向之间形成夹角， 径向凸台与楔块相 抵作用于楔块上的压力具有径向向内的分力。 这样， 在调节过程的调节阶 段， 楔块转动至与径向凸台相抵后， 增加了径向凸台作用于楔块上的径向 向内的分力， 从而使得楔块与壳体迅速脱离， 进一步提高了控制自锁机构 工作噪声的可靠性。  In a preferred embodiment of the present invention, the mating surface of the radial boss of the locking cam with the wedge and/or the mating surface of the wedge and the radial boss form an angle with the radial direction, and the radial convex The pressure acting on the wedge against the wedge has a radially inward component. Thus, during the adjustment phase of the adjustment process, the wedge rotates to abut against the radial boss, increasing the radially inward component of the radial projection on the wedge, thereby rapidly disengaging the wedge from the housing. , further improving the reliability of controlling the working noise of the self-locking mechanism.
在本发明的另一优选方案中， 锁紧凸轮的楔紧曲面相对于壳体的内径 中心的升角小于楔块的内表面与楔紧曲面之间的摩擦角。 如此设计， 在自 锁机构非调节状态下， 楔块内侧弧面与锁紧凸轮的楔紧曲面贴合、 外侧弧 面与壳体的内表面贴合， 上述角度关系的进一步限定， 使得锁紧凸轮在摩 擦自锁的作用下被楔块锁住而无法绕轴线转动， 可靠地实现了机构自锁， 进而确保靠背稳定地被锁在所需要的角度。  In another preferred embodiment of the invention, the angle of elevation of the wedged surface of the locking cam relative to the center of the inner diameter of the housing is less than the angle of friction between the inner surface of the wedge and the wedged surface. So designed, in the unadjusted state of the self-locking mechanism, the inner curved surface of the wedge fits with the wedge-shaped curved surface of the locking cam, and the outer curved surface is fitted to the inner surface of the casing, and the above-mentioned angular relationship is further defined to make the locking The cam is locked by the wedge under the action of friction self-locking and cannot rotate around the axis, which reliably realizes the self-locking of the mechanism, thereby ensuring that the backrest is stably locked at a desired angle.
在本发明的又一优选方案中， 每个接触点与形成该接触点的两个配合 圓弧的圓心均在同一径向方向， 如此设计， 可以保证接触点处于死点位置， 使锁紧凸轮更加可靠地被锁紧。 此外， 在轴向投影面内， 楔块与楔紧曲面 和壳体之间形成三个接触点， 单点侧的接触点与壳体中心之间的连线位于 双点侧的两个接触点之间； 这样， 使得楔紧状态更加可靠， 提高自锁机构 的工作稳定性。 附图说明 In still another preferred embodiment of the present invention, each contact point is in the same radial direction as the center of the two mating arcs forming the contact point, and is designed to ensure that the contact point is at a dead center position, so that the locking cam Locked more reliably. In addition, in the axial projection plane, three contact points are formed between the wedge and the wedged curved surface and the housing, and the connection between the contact point on the single-point side and the center of the housing is located at the two contact points on the two-point side. In this way, the wedge-tight state is made more reliable, and the working stability of the self-locking mechanism is improved. DRAWINGS
图 1是具体实施方式所述座椅的整体结构示意图； 之间的装配关系***图；  1 is a schematic view showing the overall structure of a seat according to a specific embodiment; an exploded view of an assembly relationship between the two;
图 3是图 2中所示调角机构与自锁机构之间的装配关系示意图； 图 4是图 3中 A向所示自锁机构的半剖视图；  Figure 3 is a schematic view showing the assembly relationship between the angle adjusting mechanism and the self-locking mechanism shown in Figure 2; Figure 4 is a half cross-sectional view of the self-locking mechanism shown in the direction A in Figure 3;
图 5是图 4中 B - B剖所示剖视图；  Figure 5 is a cross-sectional view taken along line B - B of Figure 4;
图 6是图 5中所示的 C - C剖面图；  Figure 6 is a cross-sectional view taken along line C - C shown in Figure 5;
图 7和图 8分别为自不同的角度形成的自锁机构的装配***示意图； 图 9示出了具体实施方式中所述楔块与径向凸块相抵的状态示意图； 图 10、 图 11和图 12分别示出了第二、 三、 四实施例中所述楔块与壳 体、 楔紧曲面、 径向凸台及轴向凸台配合关系， 各图均为图 4的 I部局部 放大图。  7 and 8 are schematic exploded views of the self-locking mechanism formed from different angles, respectively; FIG. 9 is a schematic view showing a state in which the wedge and the radial bump are in contact with each other in the specific embodiment; FIG. 10, FIG. Figure 12 shows the relationship between the wedge and the housing, the wedge-shaped curved surface, the radial projection and the axial projection, respectively, in the second, third and fourth embodiments, each of which is partially enlarged in part I of Figure 4 Figure.
图中：  In the picture:
座椅 10、 靠背 20、 椅座 30、 座椅调角器 40、 调角机构 50、 驱动部件 Seat 10, backrest 20, seat 30, seat recliner 40, angle adjustment mechanism 50, drive unit
501、 自锁机构 60、 手轮 70; 501, self-locking mechanism 60, hand wheel 70;
壳体 1、 翻孔 11、 内表面 12、 驱动轴 2、 本体 21、 凹坑 22、 轴向凸台 23、 配合面 24、 楔块 3、 外侧弧面 31、 配合面 32、 内侧弧面 33、 配合面 34、 大端 35、 外凸弧面 36、 弹性部件 4、 锁紧凸轮 5、 轴肩 51、 楔紧曲面 52、 径向凸台 53、 花键轴 54、 配合面 55、 端面 56、 垫片 6。  Housing 1, through hole 11, inner surface 12, drive shaft 2, body 21, recess 22, axial boss 23, mating surface 24, wedge 3, outer curved surface 31, mating surface 32, inner curved surface 33 , mating surface 34 , large end 35 , convex curved surface 36 , elastic member 4 , locking cam 5 , shoulder 51 , wedge curved surface 52 , radial projection 53 , spline shaft 54 , mating surface 55 , end surface 56 , gasket 6.
具体实施方式 detailed description
本发明的核心是提供一种座椅调角器自锁机构， 在实现座椅靠背角度 调节和锁止的基础上， 可有效控制调角机构的操作扭矩， 并可将工作噪声 降至最低。 在此基础上， 本发明不提供一种具有该自锁机构的座椅调角器 和具有该调角器的座椅。  The core of the invention is to provide a seat recliner self-locking mechanism, which can effectively control the operating torque of the angle adjusting mechanism and minimize the working noise on the basis of the seat back angle adjustment and locking. On the basis of this, the present invention does not provide a seat recliner having the self-locking mechanism and a seat having the recliner.
下面将结合说明书附图具体说明本实施方式。  The present embodiment will be specifically described below in conjunction with the drawings.
请参见图 1 , 该图示出了本实施方式所述座椅的整体结构示意图。 与现有技术相同的是， 该座椅 10的靠背 20可相对于椅座 30转动，且 在靠背 20和椅座 30之间设置有座椅调角器 40。 其中， 座椅调角器 40包 括座椅调角机构 50和自锁机构 60两个独立的功能机构装配而成， 请一并 参见图 2, 该图为该座椅调角器的调角机构与自锁机构之间的装配关系爆 炸图。 Please refer to FIG. 1 , which shows a schematic overall structure of the seat according to the embodiment. As in the prior art, the backrest 20 of the seat 10 is rotatable relative to the seat 30, and A seat recliner 40 is disposed between the backrest 20 and the seat 30. The seat recliner 40 includes two independent functional mechanisms of the seat reclining mechanism 50 and the self-locking mechanism 60. Please refer to FIG. 2 together, which is the angle adjusting mechanism of the seat recliner. Explosion diagram of the assembly relationship with the self-locking mechanism.
同样， 该座椅调角机构 50采用采用行星齿轮传动原理，通过驱动其驱 动部件 501转动实现靠背 20相对于椅座 30的转动， 实现座椅靠背角度的 手动无级调节， 请一并参见图 3 , 该图是图 2中所示调角机构与自锁机构 之间的装配关系示意图。 需要说明的是， 座椅调角机构 50的具体构成及连 接关系不是本申请的发明点所在， 故本文不再赘述。 下面结合相关附图详 细说明本申请的发明点所在： 座椅调角器的自锁机构。  Similarly, the seat angle adjusting mechanism 50 adopts the planetary gear transmission principle, and the rotation of the backrest 20 relative to the seat 30 is realized by driving the driving member 501 to rotate, thereby realizing manual stepless adjustment of the seat back angle, please refer to the figure. 3, the figure is a schematic diagram of the assembly relationship between the angle adjusting mechanism and the self-locking mechanism shown in FIG. 2. It should be noted that the specific configuration and connection relationship of the seat angle adjusting mechanism 50 are not the invention of the present application, and therefore will not be described herein. The invention of the present application will be described in detail below with reference to the accompanying drawings: Self-locking mechanism of the seat recliner.
本文中所述内侧、 外侧等方位词， 是以自锁机构的轴心线为基准定义 的， 也就是说， 接近该轴心线侧为内侧， 远离该轴心线侧为外侧， 应当理 解， 前述方位词的使用不应当局限本专利申请要求保护的范围。  The medial and lateral orientation words described herein are defined on the basis of the axis line of the self-locking mechanism, that is, the inner side close to the axis line is the inner side, and the side away from the axial line side is the outer side, it should be understood that The use of the foregoing orientation words should not be limited by the scope of the claimed invention.
请参见图 4和图 5 , 其中， 图 4是图 3中 A向所示自锁机构 60的半剖 视图， 图 5是图 4中 B - B剖所示剖视图。  4 and FIG. 5, wherein FIG. 4 is a half cross-sectional view of the self-locking mechanism 60 shown in the direction of A in FIG. 3, and FIG. 5 is a cross-sectional view taken along line B-B of FIG.
结合图 4和图 5所示，该座椅调角器自锁机构 60包括固定设置的壳体 1以及置于壳体 1 内的驱动轴 2、 锁紧凸轮 5、 两组楔块组件。； 其中， 驱 动轴 2的一端插装于壳体 1的内腔中， 其另一端置于壳体 1的外侧用于与 手轮 70连接。  As shown in conjunction with Figures 4 and 5, the seat recliner self-locking mechanism 60 includes a fixed housing 1 and a drive shaft 2, a locking cam 5, and two sets of wedge assemblies disposed within the housing 1. Wherein, one end of the drive shaft 2 is inserted into the inner cavity of the housing 1, and the other end is placed outside the housing 1 for connection with the hand wheel 70.
锁紧凸轮 5与驱动轴 2轴向相对设置，且其一端具有两个径向凸台 53; 在相邻两个径向凸台 53之间的楔紧曲面 52与壳体 1之间形成楔紧区域， 以容置楔块。该锁紧凸轮 5的另一端经壳体 1伸出后与座椅调角机构 50的 驱动部件 501连接， 以提供角度调整的驱动力； 与驱动部件 501相适配地， 锁紧凸轮 5的配合端为花键轴 54。 具体请参见图 6, 该图是图 5中所示的 C - C剖面图。  The locking cam 5 is disposed axially opposite to the drive shaft 2, and has two radial bosses 53 at one end thereof; a wedge between the wedge-shaped curved surface 52 between the adjacent two radial bosses 53 and the housing 1 Tight area to accommodate the wedge. The other end of the locking cam 5 is extended by the housing 1 and connected to the driving member 501 of the seat angle adjusting mechanism 50 to provide an angularly adjusted driving force; and the locking member 5 is adapted to the driving member 501. The mating end is a spline shaft 54. For details, see Figure 6, which is a C-C cross-sectional view shown in Figure 5.
两组楔块组件分别与相应的径向凸台 53配合设置。 其中，每组楔块组 件包括置于楔紧区域内的两个楔块 3 ,并周向对称设置在径向凸台 53两侧； 两个楔块 3的大端 35相对设置， 且两者之间设置有弹性部件 4。 这样， 非 调节状态下， 在弹性部件 4的作用下楔块 3从大端向小端形成楔紧切向转 动趋势， 其外侧弧面 31与壳体 1径向楔紧、 其内侧弧面 33与锁紧凸轮 5 径向楔紧， 使得锁紧凸轮 5被锁住， 即， 调角机构 50的驱动部件 501受锁 紧凸轮 5的限制实现锁止。 相比已有技术， 本方案中弹性部件 4在楔紧过 程中只需要提供艮小的作用力。 The two sets of wedge assemblies are respectively disposed in cooperation with the corresponding radial bosses 53. Wherein each set of wedge assemblies comprises two wedges 3 placed in the wedge region and circumferentially symmetrically disposed on opposite sides of the radial boss 53; the large ends 35 of the two wedges 3 are oppositely disposed, and both An elastic member 4 is provided between them. Thus, in the unadjusted state, under the action of the elastic member 4, the wedge 3 forms a wedge-tangential turn from the large end to the small end. The moving tendency, the outer curved surface 31 is radially wedged with the casing 1, and the inner curved surface 33 and the locking cam 5 are radially wedged, so that the locking cam 5 is locked, that is, the driving part of the angle adjusting mechanism 50 The 501 is locked by the restriction of the locking cam 5. Compared with the prior art, the elastic member 4 in the present embodiment only needs to provide a small force during the wedge tightening process.
驱动轴 2与锁紧凸轮 5的相对端具有两个轴向凸台 23 , 每个轴向凸台 The opposite ends of the drive shaft 2 and the locking cam 5 have two axial bosses 23, each of which is axially bossed
23插装于相邻两个楔块 3之间。 为清晰示出该自锁机构 60各构件详细结 构， 请一并参见图 7和图 8, 两图分别为自不同的角度形成的自锁机构 60 的装配***示意图。 调节状态下， 当操作者转动驱动轴 2时， 该驱动轴 2 上轴向伸出的轴向凸台 23推动楔块 3从小端向大端切向转动，楔块 3与壳 体 1和锁紧凸轮 5之间形成径向间隙实现解锁。 此过程为解锁阶段。 当楔 块 3转动至其大端 35与锁紧凸轮 5径向伸出的径向凸块 53相抵后， 如图 9所示， 楔块 3推动锁紧凸轮 5转动进而驱动调角机构 50的驱动部件 501 转动， 实现靠背角度的调节。 此过程为调节阶段。 23 is inserted between two adjacent wedges 3. In order to clearly show the detailed structure of each component of the self-locking mechanism 60, please refer to Fig. 7 and Fig. 8, respectively. The two figures are schematic diagrams of the assembly explosion of the self-locking mechanism 60 formed from different angles. In the adjusted state, when the operator rotates the drive shaft 2, the axially extending projection 23 on the drive shaft 2 pushes the wedge 3 to tangentially rotate from the small end to the large end, the wedge 3 and the housing 1 and the lock A radial gap is formed between the tight cams 5 for unlocking. This process is the unlock phase. When the wedge 3 is rotated until the large end 35 thereof abuts against the radial projection 53 radially extending from the locking cam 5, as shown in FIG. 9, the wedge 3 pushes the locking cam 5 to rotate to drive the angle adjusting mechanism 50. The driving member 501 is rotated to adjust the angle of the backrest. This process is the adjustment phase.
这里需要明确的是， 图中所示的两个径向凸台 53、 两组楔块组件及两 个轴向凸台 23均周向对称设置， 实际上， 前述相配合的各构件也可以采用 其它复数个，即每个轴向凸台 23插装于相邻两组楔块组件的相邻两个楔块 之间； 并且也可以采用为非对称设置， 应当理解， 只要满足使用需要均在 本申请请求保护的范围内。 当然， 采用两组构件对称设计， 一方面具有较 好的工艺性， 一方面受力较为均衡受力， 易于获得较好的机构运转可靠性。  It should be clarified here that the two radial bosses 53, the two sets of wedge assemblies and the two axial bosses 23 are arranged symmetrically in the circumferential direction. In fact, the aforementioned components can also be used. The other plurality, that is, each axial boss 23 is interposed between two adjacent wedges of the adjacent two sets of wedge assemblies; and may also be set to be asymmetric, it should be understood that as long as the requirements for use are met Within the scope of the claimed application. Of course, the two sets of component symmetrical design, on the one hand has a better processability, on the one hand, the force is more balanced and force, easy to obtain better mechanical operation reliability.
如图 6所示，在轴向投影面内， 驱动轴 2上轴向凸台 23的与楔块 3的 配合面 24与径向之间形成夹角， 并且楔块 3的与轴向凸台 23的配合面 32 也与径向之间形成夹角， 以便于轴向凸台 23与楔块 3相抵时，作用于楔块 3上的压力具有径向向内的分力； 从而使得使楔块 3在紧贴在锁紧凸轮 5 的楔紧曲面 52进行切向转动的过程中， 保持楔块 3的外周表面 31与壳体 1的内表面 12脱离。 实际上也可以是这样的设计， 即， 轴向凸台 23的与 楔块 3的配合面 24与径向之间形成夹角， 或者楔块 3的与轴向凸台 23的 配合面 32也与径向之间形成夹角，两者中的一者均可以形成前述径向向内 的分力。 相比之下， 两者共存可增加有作用于楔块 3的径向向内的分力， 从而使得楔块 3与壳体 1迅速脱离。 为进一步加强楔块 3径向位移的趋势， 如图 6所示， 锁紧凸轮 5的径 向凸台 53的与楔块 3的配合面 55与径向之间形成夹角， 并且楔块 3的与 径向凸台 53的配合面 34均与径向之间形成夹角， 两样，径向凸台 53与楔 块 3相抵时， 作用于楔块 3上的压力具有径向向内的分力。 这样， 在调节 过程的调节阶段，楔块 3转动至与径向凸台 53相抵后， 进一下增大了作用 于楔块 2的径向分力。 As shown in FIG. 6, in the axial projection plane, the mating surface 24 of the axial boss 23 on the drive shaft 2 with the wedge 3 forms an angle with the radial direction, and the axial projection of the wedge 3 The mating face 32 of the 23 also forms an angle with the radial direction, so that when the axial boss 23 abuts the wedge 3, the pressure acting on the wedge 3 has a radially inward component; The block 3 keeps the outer peripheral surface 31 of the wedge 3 from the inner surface 12 of the casing 1 during the tangential rotation of the wedge-shaped curved surface 52 of the locking cam 5. In fact, it is also possible to design such that the mating surface 24 of the axial projection 23 with the wedge 3 forms an angle with the radial direction, or the mating surface 32 of the wedge 3 with the axial projection 23 is also An angle is formed with the radial direction, either of which may form the aforementioned radially inward component. In contrast, the coexistence of the two increases the radially inward component of the wedge 3, causing the wedge 3 to quickly disengage from the housing 1. In order to further strengthen the tendency of the radial displacement of the wedge 3, as shown in FIG. 6, the mating surface 55 of the radial boss 53 of the locking cam 5 with the wedge 3 forms an angle with the radial direction, and the wedge 3 The mating surface 34 of the radial boss 53 forms an angle with the radial direction. When the radial boss 53 abuts the wedge 3, the pressure acting on the wedge 3 has a radially inward direction. force. Thus, during the adjustment phase of the adjustment process, the wedge 3 is rotated to abut against the radial boss 53, which increases the radial component acting on the wedge 2.
此外， 如图 6所示， 在轴向投影面内， 楔紧曲面 52的曲率自两个径向 凸台 53的根部向楔紧曲面 52的中部呈逐渐变小的趋势变化， 进一步确保 实现锁紧凸轮 5的可靠锁止。  In addition, as shown in FIG. 6, in the axial projection plane, the curvature of the wedge-shaped curved surface 52 changes gradually from the root of the two radial projections 53 toward the middle of the wedge-shaped curved surface 52, further ensuring the lock is realized. The locking cam 5 is reliably locked.
在楔紧过程中， 由于本方案的弹性部件只需要提供 4艮小的作用力， 因 此， 楔块 3与壳体 2内表面的摩擦力较小， 一方面大大减少了相对运动构 件之间所产生的工作噪声，另一方面可有效控制自锁机构产生的附加扭矩。 此外， 由于在前述调节阶段， 楔块 3与锁紧凸轮 5之间径向贴合， 楔块 3 与壳体 1之间径向脱离， 此过程中上述构件之间不会产生工作噪声， 从而 将整个自锁机构产生噪音的可能性降至最低。  In the wedging process, since the elastic member of the present solution only needs to provide a small force of 4 ,, the friction between the wedge 3 and the inner surface of the casing 2 is small, and on the one hand, the relative moving members are greatly reduced. The generated working noise, on the other hand, can effectively control the additional torque generated by the self-locking mechanism. In addition, since the wedge 3 is radially detached from the locking cam 5 in the aforementioned adjustment stage, the wedge 3 is radially disengaged from the housing 1, and no operational noise is generated between the members in the process. Minimize the possibility of noise generated by the entire self-locking mechanism.
需要明确， 本方案中对于驱动轴 2的定位结构可以采用多种具体手段 实现。 给出了一种具体实现方式。 壳体 1可以采用沖压工艺形成， 同时在 驱动轴 2的伸出侧的中心形成翻孔结构， 如图 5所示， 该翻孔 11具有一定 的轴向长度，以承载驱动轴 2的本体 21并对其进行可靠的径向定位。此外， 锁紧凸轮 5和驱动轴 2的相对端分别沿轴向设置有相适配的轴肩和凹坑， 用于实现驱动轴 2另一端的定位， 具体为图示所示的锁紧凸轮 5端部的轴 肩 51和驱动轴 2端部的凹坑 22, 应当理解， 上述相配合的轴肩和凹坑也 可以反向设置。  It should be clarified that the positioning structure of the drive shaft 2 in this solution can be implemented by various specific means. A specific implementation is given. The housing 1 may be formed by a stamping process while forming a tumbling structure at the center of the projecting side of the drive shaft 2, as shown in Fig. 5, the boring hole 11 has a certain axial length to carry the body 21 of the drive shaft 2. And reliable radial positioning. In addition, the opposite ends of the locking cam 5 and the drive shaft 2 are respectively provided with matching shoulders and recesses in the axial direction for realizing the positioning of the other end of the drive shaft 2, specifically the locking cam shown in the drawing. 5 end shoulder 51 and recess 22 at the end of drive shaft 2, it should be understood that the mating shoulders and recesses described above may also be reversed.
为进一步提高该机构的工作稳定性， 可对于各构件的配合面作进一步 的优化设计。 下面分别针对不同配合关系进行详细说明。  In order to further improve the working stability of the mechanism, the mating surface of each component can be further optimized. The following is a detailed description of the different coordination relationships.
结合图 6所示的实施例，楔紧曲面 52相对于壳体 1的内径中心的升角 小于楔块 3的内表面与楔紧曲面 52之间的摩擦角。如此设计， 在自锁机构 非调节状态下， 上述角度关系的进一步限定， 使得锁紧凸轮 5在摩擦自锁 的作用下被楔块 3锁住而无法绕轴线转动， 可靠地实现了机构自锁， 进而 确保靠背稳定地被锁在所需要的角度。 In conjunction with the embodiment illustrated in FIG. 6, the angle of elevation of the wedged curved surface 52 relative to the center of the inner diameter of the housing 1 is less than the angle of friction between the inner surface of the wedge 3 and the wedged curved surface 52. So designed, in the unadjusted state of the self-locking mechanism, the above-mentioned angular relationship is further defined, so that the locking cam 5 is locked by the wedge 3 under the action of the friction self-locking and cannot rotate around the axis, thereby reliably realizing the mechanism self-locking. , and then Make sure the backrest is locked securely at the desired angle.
另外， 为了使楔块 3在非调节状态可靠的锁紧锁紧凸轮 5 , 必须合理 地设计楔块 3与楔紧曲面 52、 壳体 1之间的接触副。 在轴向投影面内， 楔 紧曲面 52与楔块 23的内侧弧面 33两点 （a、 b )接触 （内侧弧面 33中段 内凹）， 楔块 3内侧弧面 33的 a、 b段半径均略大于楔紧曲面 52的圓弧半 径； 壳体 1与楔块 3的接触点（c )与壳体 1中心之间的连线位于楔紧曲面 52与楔块 3的内侧弧面 33的两个接触点 （a、 b )之间， 楔块 3外侧弧面 31的半径略小于壳体 1 内表面 12的半径。 如此设计， 楔块 3与楔紧曲面 52和壳体 1之间形成三个接触点， 且单点侧的接触点以 （c )与与壳体中 心之间的连线位于双点侧的两个接触点 （a、 b )之间， 使锁紧凸轮 5的锁 紧更加可靠。 进一步地， 每个接触点与形成该接触点的两个配合圓弧的圓 心均在同一径向方向； 也就是说， a点处的内侧弧面 33和楔紧曲面 52的 圓弧圓心与 a接触点在同一径向方向， b点处的内侧弧面 33和楔紧曲面 52 的圓弧圓心与 b接触点在同一径向方向， c点处的壳体 1 内表面和外侧弧 面 31的圓弧圓心与 c接触点在同一径向方向。  Further, in order to lock the locking cam 5 with the wedge 3 in a non-adjusted state, the contact pair between the wedge 3 and the wedged curved surface 52 and the casing 1 must be rationally designed. In the axial projection plane, the wedged curved surface 52 is in contact with two points (a, b) of the inner curved surface 33 of the wedge 23 (the inner curved surface 33 is concave in the middle), and the a and b segments of the inner curved surface 33 of the wedge 3 The radius is slightly larger than the radius of the arc of the wedge surface 52; the line between the contact point (c) of the casing 1 and the wedge 3 and the center of the casing 1 is located at the inner curved surface 33 of the wedge surface 52 and the wedge 3. Between the two contact points (a, b), the radius of the outer curved surface 31 of the wedge 3 is slightly smaller than the radius of the inner surface 12 of the casing 1. So designed, the wedge 3 forms three contact points with the wedge surface 52 and the housing 1, and the contact points on the single point side are located on the two-point side with the line between (c) and the center of the housing. Between the contact points (a, b), the locking of the locking cam 5 is more reliable. Further, each contact point is in the same radial direction as the center of the two mating arcs forming the contact point; that is, the inner arc surface 33 at the a point and the arc center of the wedge surface 52 and The contact points are in the same radial direction, the inner arc surface 33 at point b and the arc center of the wedge surface 52 are in the same radial direction as the b contact point, and the inner surface of the housing 1 and the outer curved surface 31 at point c The center of the arc is in the same radial direction as the point of contact with c.
此外， 楔块 3的两端均具有外凸弧面， 即， 小端为外凸弧面 36, 大端 的配合面 34也为外凸弧面， 分别用于与驱动轴 2的轴向凸台 23和锁紧凸 轮 5的径向凸台 53线接触配合， 提高机构动作的灵活可靠性。  In addition, both ends of the wedge 3 have a convex arc surface, that is, the small end is a convex arc surface 36, and the large end mating surface 34 is also an outer convex arc surface, which is respectively used for the axial boss with the drive shaft 2. 23 and the radial boss 53 of the locking cam 5 are in line contact with each other to improve the flexibility and reliability of the mechanism.
当然， 在第二实施例中， 实现上述线接触配合的外凸圓弧可分别设置 在轴向凸台 24的配合面 24以及径向凸台 53的配合面 55处， 具体请参见 图 10, 该图示为上述书配合结构的局部示意图。  Of course, in the second embodiment, the outer convex arcs for realizing the above-mentioned line contact fit can be respectively disposed at the mating surface 24 of the axial boss 24 and the mating surface 55 of the radial boss 53, as shown in FIG. This illustration is a partial schematic view of the book mating structure described above.
请参见图 11和图 12, 分别示出第三、 第四实施例中上述配合结构的 局部示意图。  Referring to Figures 11 and 12, there are shown partial schematic views of the above-described mating structure in the third and fourth embodiments, respectively.
如图 11所示， 第三实施例与第一实施例的主要区别是， 在轴向投影面 内， 壳体 1与楔块 3的内侧弧面 33两点接触（d、 e ), 楔紧曲面 52与楔块 3的接触点 (f)与壳体 1中心之间的连线位于壳体 1与楔块 3的内侧弧面 33 的两个接触点之间 （d、 e )。  As shown in FIG. 11, the main difference between the third embodiment and the first embodiment is that, in the axial projection plane, the housing 1 is in contact with the inner arc surface 33 of the wedge 3 at two points (d, e), and the wedge is tight. The line between the contact point (f) of the curved surface 52 and the wedge 3 and the center of the casing 1 is located between the two contact points of the inner side arc surface 33 of the casing 1 and the wedge 3 (d, e).
如图 12所示， 第四实施例与第一实施例的主要区别是，在轴向投影面 内， 壳体 1与楔块 3的内侧弧面 33单点接触 （ g ), 楔紧曲面 52与楔块 3 的单点接触 (h) , 且两接触点 （g、 h)的连线在同一径向方向。 As shown in FIG. 12, the main difference between the fourth embodiment and the first embodiment is that, in the axial projection plane, the housing 1 is in single contact with the inner arc surface 33 of the wedge 3 (g), and the wedge surface 52 is wedged. With wedge 3 Single point contact (h), and the lines of the two contact points (g, h) are in the same radial direction.
上述各实施例分别为楔块 3与壳体 1、楔紧曲面 52、径向凸台 52及轴 向凸台 23之间的不同配合结构，应当理解，各具体方案并不限制本申请的 保护范围。  The above embodiments are respectively different mating structures between the wedge 3 and the housing 1, the wedged curved surface 52, the radial boss 52 and the axial boss 23. It should be understood that the specific solutions do not limit the protection of the present application. range.
基于本发明设计构思， 调角机构 50与自锁机构 60可为一体式设计， 也可以为图中所示的分体式设计， 即， 自锁机构 60具有独立的壳体， 并且 内部构件之间形成独立的必要径向、 轴向装配尺寸链。 比如， 锁紧凸轮 5 的花键轴 54穿垫片 6的内孔； 垫片 6与壳体 1的内表面 12小间隙配合， 且与锁紧凸轮 5的端面 56贴合、 与楔块 3小间隙配合、 与弹性部件 4间隙 接触。  Based on the design concept of the present invention, the angle adjusting mechanism 50 and the self-locking mechanism 60 may be of a one-piece design, or may be a split type design as shown in the drawing, that is, the self-locking mechanism 60 has a separate housing, and between the internal components. Form the independent necessary radial, axial assembly dimension chain. For example, the spline shaft 54 of the locking cam 5 passes through the inner hole of the spacer 6; the spacer 6 is loosely fitted with the inner surface 12 of the housing 1, and is fitted to the end surface 56 of the locking cam 5, and the wedge 3 The small gap fits and is in contact with the elastic member 4.
以上所述仅是本发明的优选实施方式， 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， 还可以做出若干改进 和润饰， 比如， 弹性部件 4采用除螺旋弹簧之外的其他可产生弹性变形的 结构形式， 这些改进和润饰也应视为本发明的保护范围。  The above description is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make several improvements and refinements without departing from the principles of the present invention, for example, the elastic member 4 These structural modifications other than helical springs which produce elastic deformation are also considered to be within the scope of the invention.

Claims

权 利 要 求 Rights request
1、 座椅调角器自锁机构， 包括：  1. Seat recliner self-locking mechanism, including:
固定设置的壳体； 和  a fixedly mounted housing; and
驱动轴， 其一端插装于所述壳体的内腔中； 其特征在于， 所述壳体内 还包括：  a drive shaft, one end of which is inserted into the inner cavity of the housing; wherein the housing further includes:
锁紧凸轮， 其与所述驱动轴轴向相对的一端具有至少两个径向凸台， 且相邻所述径向凸台之间的楔紧曲面与所述壳体之间形成楔紧区域； 其另 一端用于驱动座椅调角机构的驱动部件转动；  a locking cam having at least two radial bosses at an axial end opposite to the drive shaft, and a wedge-shaped surface between the adjacent radial bosses and a wedge-forming region between the housings The other end is used to drive the driving component of the seat reclining mechanism to rotate;
至少两组楔块组件， 分别与相应的所述径向凸台配合设置； 每组楔块 组件包括周向对称设置在所述径向凸台两侧楔紧区域内的两个楔块， 两个 所述楔块的大端相对且两者之间设置有弹性部件； 且  At least two sets of wedge assemblies are respectively disposed in cooperation with the corresponding radial bosses; each set of wedge assemblies includes two wedges circumferentially symmetrically disposed in the wedging region on both sides of the radial boss, two The large ends of the wedges are opposite and provided with elastic members therebetween;
所述驱动轴与所述锁紧凸轮的相对端具有至少两个轴向凸台， 每个所 述轴向凸台插装于相邻两组楔块组件的相邻楔块之间；且在轴向投影面内， 所述轴向凸台的与所述楔块的配合面和 /或所述楔块的与所述轴向凸台的 配合面与径向之间形成夹角， 所述轴向凸台与所述楔块相抵作用于所述楔 块上的压力具有径向向内的分力。  The drive shaft and the opposite end of the locking cam have at least two axial bosses, each of the axial bosses being interposed between adjacent wedges of two adjacent sets of wedge assemblies; Forming an angle between a mating surface of the axial boss and the wedge and/or a mating surface of the wedge and the axial boss and a radial direction in the axial projection plane, The pressure exerted by the axial boss against the wedge on the wedge has a radially inward component.
2、 根据权利要求 1所述的座椅调角器自锁机构， 其特征在于， 在轴向 投影面内， 所述径向凸台的与所述楔块的配合面和 /或所述楔块的与所述径 向凸台的配合面与径向之间形成夹角， 所述径向凸台与所述楔块相抵作用 于所述楔块上的压力具有径向向内的分力。  2. The seat recliner self-locking mechanism according to claim 1, wherein in the axial projection plane, the mating surface of the radial boss with the wedge and/or the wedge An angle formed between a mating surface of the block and the radial boss and a radial direction, and a pressure of the radial boss against the wedge acting on the wedge has a radially inward component .
3、 根据权利要求 1所述的座椅调角器自锁机构， 其特征在于， 所述锁 紧凸轮和所述驱动轴的相对端分别沿轴向设置有相适配的轴肩和 坑。  3. The seat recliner self-locking mechanism according to claim 1, wherein the locking cam and the opposite ends of the drive shaft are respectively provided with matching shoulders and pits in the axial direction.
4、 根据权利要求 1所述的座椅调角器的自锁机构， 其特征在于， 在轴 向投影面内， 所述楔紧曲面的曲率自两个所述径向凸台的根部向所述楔紧 曲面的中部呈逐渐变小的趋势变化。  4. The self-locking mechanism of a seat recliner according to claim 1, wherein in the axial projection plane, the curvature of the wedge-shaped curved surface is from the root of the two radial projections The middle of the wedge-shaped curved surface changes gradually.
5、 根据权利要求 4所述的座椅调角器自锁机构， 其特征在于， 所述楔 紧曲面相对于所述壳体的内径中心的升角小于所述楔块的内表面与所述楔 紧曲面之间的摩擦角。  5. The seat recliner self-locking mechanism according to claim 4, wherein an angle of elevation of the wedge-shaped curved surface with respect to an inner diameter center of the housing is smaller than an inner surface of the wedge and the The angle of friction between the wedge surfaces.
6、 根据权利要求 5所述的座椅调角器自锁机构， 其特征在于， 在轴向 投影面内， 楔块与楔紧曲面和壳体之间形成三个接触点， 单点侧的接触点 与壳体中心之间的连线位于双点侧的两个接触点之间。 6. The seat recliner self-locking mechanism according to claim 5, wherein In the projection plane, three contact points are formed between the wedge and the wedged surface and the housing, and the line between the contact point on the single point side and the center of the housing is located between the two contact points on the two-point side.
7、 根据权利要求 6所述的座椅调角器自锁机构， 其特征在于， 每个所 述接触点与形成接触点的两个配合圓弧的圓心均在同一径向方向。  7. The seat recliner self-locking mechanism according to claim 6, wherein each of the contact points is in the same radial direction as the center of the two mating arcs forming the contact point.
8、 根据权利要求 7所述的座椅调角器自锁机构， 其特征在于， 所述楔 块的两端均具有外凸弧面， 分别用于与所述驱动轴的轴向凸台和所述锁紧 凸轮的径向凸台线接触配合。  8. The seat recliner self-locking mechanism according to claim 7, wherein both ends of the wedge have an outer convex arc surface for respectively engaging an axial boss of the drive shaft and The radial boss line of the locking cam is in contact engagement.
9、 座椅调角器， 包括设置在座椅靠背和椅座之间的座椅调角机构， 其 特征在于， 还包括如权利要求 1至 8任一项所述座椅调角器自锁机构， 所 述锁紧凸轮与所述座椅调角机构的驱动部件连接。  9. A seat recliner comprising a seat reclining mechanism disposed between a seat back and a seat, further comprising a seat recliner self-locking according to any one of claims 1 to 8. a mechanism, the locking cam being coupled to a driving component of the seat reclining mechanism.
10、 座椅， 其靠背可相对于椅座转动， 其特征在于， 在所述靠背和椅 座之间设置有如权利要求 9所述的座椅调角器。  10. A seat, the backrest of which is rotatable relative to the seat, characterized in that a seat recliner according to claim 9 is provided between the backrest and the seat.
PCT/CN2012/070645 2011-01-27 2012-01-20 Seat angle adjuster and self-locking mechanism thereof, and seat with the angle adjuster WO2012100729A1 (en)

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