A double-motion linkage mechanism and its application

Abstract

The application provides a linkage mechanism for realizing double motion and application thereof, which comprises a first linkage, a second linkage and a third linkage arranged on a base; the upper end of the third linkage is hingedly connected with a first pivot point of a supporting linkage; the upper end of the second linkage is hingedly connected with one end of a to-be-driven part; the other end of the to-be-driven part is hingedly connected with a third pivot point of the supporting linkage; the upper end of the first linkage is hingedly connected with a second pivot point of the supporting linkage, and the second pivot point is arranged between the first pivot point and the third pivot point; the linkage mechanism is driven to realize the smooth transition of the double motion of sliding and arc-shaped overturning of the to-be-driven part. The air inlet grille using the linkage mechanism can improve the appearance of the air inlet grille, and can realize the leakage of 0% of the active air inlet grille in the closed state; and the length between the linkages is adjusted to achieve the effect of speed reduction and torque increase, and the driving torque of the active air inlet grille actuator is reduced.

Description

Technical Field

[0001] This invention belongs to the field of automotive parts technology, specifically relating to a linkage mechanism that realizes dual motion and its application. Background Technology

[0002] An active grille shutter is an adjustable ventilation system used at the front of a vehicle, belonging to the category of vehicle body accessories. It uses an electric motor-driven actuator to dynamically adjust the opening and closing of the grille based on parameters such as engine temperature and vehicle speed, thereby optimizing vehicle performance. Typically, active grilles have a multi-blade structure of 3 to 10 blades, requiring a complex transmission mechanism to connect multiple blades together. However, this method results in a long transmission path, high torque loss, a complex overall mechanism, and significant air leakage due to gaps between the blades. Therefore, in recent years, dual-blade active grilles have emerged. However, dual-blade grilles experience higher wind pressure, requiring actuators with greater torque to drive them. Alongside this, active air intake grilles that guide movement via multi-path tracks are also being developed. For example, KR20230090744 A discloses a multi-path guided AGS that utilizes a track-type drive method to achieve multiple motion trajectories. By using parallel segment movement, it strengthens the seal and improves air tightness. Although this technical solution can improve air tightness without changing the torque requirement, the air intake grille using the track-type drive method has a large contact area between the blades and the track, which can lead to wear and durability failure and foreign object jamming.

[0003] Therefore, how to ensure the airtightness of the air intake grille when it is closed, while also achieving the actuator's drive of the air intake grille during use with a small torque, in order to improve vehicle performance, is a technical problem that needs to be solved. Summary of the Invention

[0004] This invention provides a linkage mechanism for achieving dual motion and its application.

[0005] The objective of this invention is achieved through the following technical solution:

[0006] A linkage mechanism for achieving dual motion includes a first link, a second link, and a third link mounted on a base. The upper end of the third link is hinged to a first pivot point of a supporting link. The upper end of the second link is hinged to one end of a component to be driven, and the other end of the component to be driven is hinged to a third pivot point of the supporting link. The upper end of the first link is hinged to a second pivot point of the supporting link, and the second pivot point is located between the first and third pivot points. When the linkage mechanism is activated, it drives the component to achieve a smooth transition between sliding and arc-shaped flipping motions.

[0007] Preferably, the linkage mechanism simultaneously satisfies the following conditions: L1 = L2, L1 > L3, (L3 - L1) < L4 < (L3 + L1), where L1 is the length of the first link, L2 is the length of the second link, L3 is the length of the third link, and L4 is the length of the line connecting the lower ends of the first link and the third link.

[0008] Preferably, an intake grille having a linkage mechanism for realizing double motion as described above includes a grille frame and a motor disposed on one side of the grille frame. The motor is connected to a driving link passing through the grille frame. Linkage mechanisms are symmetrically connected to both ends of the driving link. The driven member is a blade. When the motor operates, it drives the driving link to rotate, and through the action of the linkage mechanism, the blade is driven to achieve a smooth transition between the double motions of sliding and arc flipping within the grille frame.

[0009] Preferably, the lower ends of the first link and the second link are pivotally connected to the inner side of the grille frame. The lower end of the third link is connected to the driving link, and the second link is disposed outside the first link.

[0010] Preferably, a window matching the blade is provided on the front side of the grille frame. When the blade is closed, the blade is lap-connected to the periphery of the window.

[0011] Preferably, an L-shaped lap surface is provided on the inner side of the edge of the window, and wedge surfaces are further provided on both sides of the edge of the window. Wedge mating surfaces cooperating with the wedge surfaces are provided on both sides of the blade.

[0012] Preferably, a limiting block is provided inside the third link.

[0013] A vehicle having an intake grille as described above.

[0014] The beneficial effects of the present invention are reflected in that: the linkage mechanism of the present invention can easily achieve a smooth transition between the double motions of sliding and arc flipping for the driven member. When it is actually applied to an active intake grille, when the intake grille is in the open state, the blade and the driving link can be completely hidden, improving the aesthetics. When in the closed state, a leakage rate of 0% of the active intake grille can be achieved; and by adjusting the lengths between the links, the effect of decelerating and increasing torque is achieved, reducing the driving torque of the active intake grille actuator. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0016] Figure 1 : Schematic diagram of the connection structure between the linkage mechanisms of the present invention.

[0017] Figure 2 : A schematic diagram of the linkage mechanism of the present invention applied to one side of the air intake grille.

[0018] Figure 3 : Schematic diagram of the air intake grille structure with linkage mechanism of the present invention.

[0019] Figure 4 This invention Figure 3 Another structural diagram, in which the grille frame is hidden.

[0020] Figure 5 This invention Figure 4 A schematic diagram of the structure from another direction.

[0021] Figure 6 : A schematic diagram of the grid frame structure of the present invention. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this invention clearer, the following description is provided in conjunction with the appendix. Figures 1-6 The present invention will be further described in detail below with reference to embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0023] A linkage mechanism for achieving dual motion includes a first link 52, a second link 53, and a third link 54 mounted on a base. The upper end of the third link 54 is hinged to a first pivot point 511 of a supporting link 51. The upper end of the second link 53 is hinged to one end of a component to be driven, and the other end of the component to be driven is hinged to a third pivot point 513 of the supporting link 51. The upper end of the first link 52 is hinged to a second pivot point 512 of the supporting link 51, and the second pivot point 512 is located between the first pivot point 511 and the third pivot point 513. When the linkage mechanism is activated, it drives the component to achieve a smooth transition between sliding and arc-shaped flipping motions. It should be noted that... Figure 1 In the illustration, the cross-section of the support link 51 is triangular, and it should be regarded as a whole.

[0024] The present invention also discloses an air intake grille with the above linkage mechanism. The linkage mechanism can achieve 0% leakage in the closed state of the air intake grille, and the blades can be completely hidden in the open state for a more aesthetically pleasing effect. At the same time, further control of the length between the linkages can also achieve the effect of deceleration and torque increase of the product actuator.

[0025] Specifically, the intake grille includes a grille frame 1 and a motor 4 disposed on one side of the grille frame 1. The motor 4 is connected to a driving link 3 passing through the grille frame 1, and both ends of the driving link 3 are symmetrically connected with a link mechanism. At this time, the driven member in the link mechanism is the blade 2, and the driving link 3 is equivalent to part of the base in the link mechanism. When the motor 4 operates, it drives the driving link 3 to rotate, and through the action of the link mechanism, the blade 2 is driven to achieve a smooth transition between the sliding and arc-shaped flipping motions in the grille frame 1. When the blade 2 moves from the open state to the closed state, it transitions from arc-shaped flipping to sliding, and vice versa, from sliding to arc-shaped flipping. The arc of the arc-shaped flipping in the present invention is a non-circular arc. It can be further understood that the movement locus of the mass center of the driven member in the present invention in the space reflected on the plane is a combination of a straight line segment and a circular arc segment, and the straight line segment refers to a segment with a curvature close to 0.

[0026] Combined with the illustration of the intake grille, the link mechanism 5 includes a support link 51, a first link 52, a second link 53, and a third link 54. The upper end of the first link 52 is pivotally connected to the middle of the support link 51, the upper end of the second link 53 is pivotally connected to the blade 2, one end of the third link 54 is connected to the proximal end of the support link 51, and the distal end of the support link 51 is connected to the inner side of the blade 2; the other end of the third link 54 is connected to the driving link 3. The link mechanism simultaneously satisfies the following conditions: L1 = L2, L1 > L3, (L3 - L1) < L4 < (L3 + L1), where L1 is the length of the first link, L2 is the length of the second link, L3 is the length of the third link, and L4 is the length of the line connecting the lower ends of the first link and the third link. The lower ends of the first link 52 and the second link 53 are pivotally connected to the inner side of the grille frame 1. The second link 53 is disposed outside the first link 52. Figure 2The diagram illustrates the position of blade 2 when the grille is fully closed. When blade 2 opens, it will slide continuously from position A to position B via a linkage mechanism. It will then continue moving under the influence of the linkage mechanism, undergoing a double backward rotation until it is fully open to position C. Lines D and E in the diagram represent the upper and lower movement trajectories of the blade. The linkage mechanism of this invention can achieve the effect of deceleration and torque increase in an engine. Its principle is as follows: when the motor drives the drive link 3 to rotate, it will immediately drive the third link 54 to rotate. Since the length of the third link 54 is shorter than that of the first link 52 and the second link 53, the diameter of the circular trajectory formed by the rotation of the third link 54 is smaller than the diameter of the circular trajectory formed by the rotation of the first link 52 and the second link 53. When the third link and the first or second link rotate to achieve the same angle, the third link will take longer than the first or second link, meaning the angular velocity of the third link is greater than that of the first or second link. Therefore, the effect of deceleration and torque increase can be achieved. The movement speed of the first link 52 and the second link 53 is the same as that of the blades.

[0027] When the air intake grille is closed and blade 2 needs to be opened, the linkage mechanism drives the blade to first slide away from the air intake window of the grille frame, and then gradually rotate backwards towards the rear of the air intake window until it is fully open and the blade is completely hidden. To further ensure the reliability of the blade rotation process, a limit block 541 is provided on the inner side of the third linkage 54 to further limit the maximum angle reached by the blade rotation. That is to say, even when the motor precision is not high, the presence of the limit block 541 can still ensure the rotation effect well.

[0028] Similarly, when the air intake grille needs to be closed while it is open, the linkage mechanism drives the blades to flip towards the air intake window. When they are flipped to a state that is almost parallel to the surface of the air intake window, they move towards the window in a near-linear manner until the air intake window is closed.

[0029] To improve the sealing of the grille frame when closed, a window 11 matching the blade 2 is provided on the front side of the grille frame 1. When the blade 2 is closed, the periphery of the blade 2 overlaps with the periphery of the window 11.

[0030] Furthermore, L-shaped overlapping surfaces 111 are provided around the inner perimeter of the window 11, and the periphery of the blade 2 is connected to the L-shaped overlapping surfaces 111 through overlapping edges 22. Additionally, wedge-shaped surfaces 112 are provided on both sides of the edge of the window 11, and correspondingly, wedge-shaped mating surfaces 21 that mate with the wedge-shaped surfaces 112 are provided on both sides of the blade 2. When the blade is fully closed, the blade 2 is in complete contact with the periphery of the grille frame, ensuring that airflow in front of the vehicle cannot enter through the grille frame air intake window, thus achieving a 0% air leakage effect.

[0031] The structure of the wedge-shaped surface and the wedge-shaped mating surface can further ensure that the blade and the frame will not interfere or collide during the translational movement of the blade.

[0032] The present invention also discloses a vehicle having an air intake grille as described in any one of the above, the performance of which will be greatly improved compared to other structures.

[0033] Furthermore, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., used in this invention to indicate the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Additionally, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] Furthermore, the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A linkage mechanism for achieving dual motion, characterized in that: It includes a first connecting rod, a second connecting rod, and a third connecting rod placed on a base; the upper end of the third connecting rod is hinged to a first pivot point of a support connecting rod, the upper end of the second connecting rod is hinged to one end of a driven member, and the other end of the driven member is hinged to a third pivot point of the support connecting rod; the upper end of the first connecting rod is hinged to a second pivot point of the support connecting rod, and the second pivot point is placed between the first pivot point and the third pivot point; when the connecting rod mechanism acts, it drives the driven member to achieve a smooth transition between the dual movements of sliding and arc flipping. The connecting rod mechanism simultaneously satisfies the following conditions: L1 = L2, L1 > L3, (L3 - L1) < L4 < (L3 + L1), where L1 is the length of the first connecting rod, L2 is the length of the second connecting rod, L3 is the length of the third connecting rod, and L4 is the length of the line connecting the centers of the lower ends of the first connecting rod and the third connecting rod.

2. An air intake grille having a linkage mechanism for achieving dual motion as described in claim 1, characterized in that: It includes a grille frame and a motor placed on one side of the grille frame. The motor is connected to a driving connecting rod passing through the grille frame, and both ends of the driving connecting rod are symmetrically connected with a connecting rod mechanism. The driven member is a blade; when the motor works, it drives the driving connecting rod to rotate, and through the action of the connecting rod mechanism, it drives the blade to achieve a smooth transition between the dual movements of sliding and arc flipping within the grille frame.

3. The air intake grille as described in claim 2, characterized in that: The lower ends of the first connecting rod and the second connecting rod are pivotally connected to the inner side of the grille frame, the lower end of the third connecting rod is connected to the driving connecting rod, and the second connecting rod is arranged outside the first connecting rod.

4. An air intake grille as described in claim 3, characterized in that: A window matching the blade is opened on the front side of the grille frame. When the blade is closed, the blade is lap-connected to the periphery of the window.

5. An air intake grille as described in claim 4, characterized in that: An L-shaped lapping surface is arranged on the inner side of the edge of the window, and wedge-shaped surfaces are also arranged on both sides of the edge of the window. Wedge-shaped mating surfaces matching the wedge-shaped surfaces are arranged on both sides of the blade.

6. An air intake grille as described in claim 5, characterized in that: A limiting block is arranged on the inner side of the third connecting rod.

7. A vehicle having an air intake grille as described in any one of claims 4 - 6.

Images