A fully automatic stretch frame

Abstract

The application discloses a kind of full-automatic stretch frame, including bottom plate, lifting frame, lifting drive mechanism being arranged between lifting frame and bottom plate, and X type stretch structure being slidably arranged on lifting frame;The application can provide a cubic shape size expansion by X type stretch structure and lifting drive mechanism, and the equipment for the cubic body needs to be adjusted has suitability, X type stretch structure can realize the stretch of four directions;Through the linkage setting of each pulley and pull rope in telescopic power assembly, fiber rod can be stretched outwards simultaneously in the process that telescopic pipe moves outward;X type stretch structure can make driving motor transmit power to lifting transmission rod while driving lifting drive rod to rotate by the setting of lifting drive rod, cross steering gear box and lifting transmission rod, and then make the hooke straight line mechanism at both ends of lifting transmission rod move, make the hooke straight line mechanism at four points move synchronously, and then lift lifting frame.

Description

Technical Field

[0001] This invention relates to the field of machinery, and more specifically to a fully automatic extension frame. Background Technology

[0002] In daily life, some devices need to be upgraded before they can be unfolded in the raised plane. These include some sunshade structures, rainproof structures, and lifting unfolding panels. For example, Chinese patent with publication number CN210734320U, entitled "An Automotive Roof Unfolding Device," uses a lifting component to rise upwards and a multi-stage unfolding panel structure to unfold outwards. Its overall structure is large, occupies a lot of space when folded up, is inconvenient to install, and is not suitable for devices with limited space, thus failing to meet usage requirements. Summary of the Invention

[0003] To solve the above-mentioned technical problems, the technical solution provided by the present invention is as follows: a fully automatic extension frame, including a base plate, a lifting frame, a lifting drive mechanism disposed between the lifting frame and the base plate, and an X-shaped extension structure slidably disposed on the lifting frame. The base plate has bottom bars at both ends. The lifting drive mechanism includes a lifting drive rod, a drive motor, a cross-shaped steering gearbox, and a lifting transmission rod. The drive motor drives the lifting drive rod to rotate through the motor gearbox. Both ends of the lifting drive rod are connected to the lifting transmission rod through the cross-shaped steering gearbox, so that the lifting transmission rod rotates synchronously when the lifting drive rod rotates. Both ends of the lifting transmission rod are connected to a Hawken linear mechanism. The driving end of the Hawken linear mechanism is connected to the bottom of the lifting frame, and an assist spring is disposed between the moving end of the Hawken linear mechanism and the base plate.

[0004] The X-shaped extension structure includes a first telescopic structure, a second telescopic structure, a third telescopic structure, and a fourth telescopic structure arranged in parallel. The first, second, third, and fourth telescopic structures are staggered to form an X shape. A drive gearbox is located in the middle of the structure, and its end is slidably connected to the lifting frame. An upper central gear is located in the middle of the first and second telescopic structures, and a lower central gear is located in the middle of the third and fourth telescopic structures. The upper and lower central gears are coaxial and rotate in opposite directions. The upper and lower central gears are driven by the drive gearbox. Racks that mesh with the upper and lower central gears are provided on the side walls of the first, second, third, and fourth telescopic structures.

[0005] Preferably, a limit switch bracket is provided at the connection between the cross steering gearbox and the lifting transmission rod, and the limit switch bracket is provided on both sides of the lifting transmission rod with a lifting limit switch and a retraction limit switch respectively.

[0006] Preferably, the Hocken linear mechanism includes a drive block disposed at the end of the lifting drive rod, a drive arm is hinged to one end of the drive block, a bracket connected to the lifting frame is hinged to the other end of the drive arm, a connecting arm is hinged to the middle of the drive arm, and the other end of the connecting arm is hinged to the outside of the cross steering gearbox.

[0007] Preferably, the drive arm includes a downwardly protruding arc-shaped arm hinged to the drive block and a straight arm hinged to the bracket, and the connecting arm is hinged at the connection between the arc-shaped arm and the straight arm.

[0008] Preferably, the bracket includes an L-shaped support frame, one end of which is hinged to the drive arm via a hinge block, and the lifting frame is connected to the L-shaped support frame.

[0009] Preferably, the L-shaped support frame is connected to one end of the assist spring, and the other end of the assist spring is connected to the bottom bar; the assist spring includes a spring coil portion, one end of which is rotatably connected to the L-shaped support frame via a connecting rod one, and the other end is rotatably connected to the bottom bar via a connecting rod two, and a spring insertion seat corresponding to the connecting rod two is located on the bottom bar.

[0010] Preferably, the second, third, and fourth telescopic structures are all identical to the first telescopic structure. The first telescopic structure includes a telescopic tube with a rack, a fiber rod inside the telescopic tube, and a telescopic power assembly on the telescopic tube, so that the front end of the fiber rod extends out of the telescopic tube along the moving direction of the telescopic tube.

[0011] Preferably, the telescopic power assembly includes a first movable pulley, a second movable pulley, a first fixed pulley, a second fixed pulley, and a first pull rope and a second pull rope. The first movable pulley is located inside the telescopic tube near the front end of the fiber rod, and the second movable pulley is located at the other end of the telescopic tube. The first fixed pulley is located on the outside of one side of the telescopic tube. The second fixed pulley is located outside the end of the telescopic tube where the second movable pulley is located. A movable end is provided on the outer wall of the end of the telescopic tube where the second movable pulley is located. The first pull rope passes through the movable end sequentially around the second fixed pulley and the first movable pulley before connecting to the rear end of the fiber rod. The second pull rope passes through the movable end sequentially around the first fixed pulley and the second movable pulley before connecting to the rear end of the fiber rod.

[0012] After adopting the above solution, the present invention has the following advantages: the present invention, through the X-shaped extension structure and the lifting drive mechanism, can provide a cubic shape size expansion, which is suitable for all devices that require cubic adjustment;

[0013] The X-shaped extension structure enables extension in four directions. Through the meshing of gears and racks, all four telescopic structures can extend outward simultaneously. The interconnected pulleys and ropes within the telescopic power assembly allow the fiber rod to extend outward simultaneously as the telescopic tube moves outward, forming a complete closed-loop motion. The X-shaped extension structure, with its lifting drive rod, cross-shaped steering gearbox, and lifting transmission rod, allows the drive motor to transmit power to the lifting transmission rod while simultaneously rotating the lifting drive rod. This, in turn, causes the Hawken linear mechanisms at both ends of the lifting transmission rod to move, resulting in synchronized movement of the four Hawken linear mechanisms and lifting the lifting frame. Simultaneous assist springs at all four points aid in the lifting action, making the design simple, compact, and stable. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of a fully automatic extension frame according to the present invention.

[0016] Figure 2 This is a schematic diagram showing the connection between the lifting frame and the lifting drive mechanism in a fully automatic extension frame according to the present invention.

[0017] Figure 3 This is a schematic diagram of the lifting drive mechanism in a fully automatic extension frame according to the present invention.

[0018] Figure 4 This is a schematic diagram of the structure of the Hocken linear mechanism in a fully automatic extension frame according to the present invention.

[0019] Figure 5 This is a schematic diagram of the motion of the Hocken linear mechanism in a fully automatic extension frame according to the present invention.

[0020] Figure 6 This is a schematic diagram of the assist spring in a fully automatic extension frame according to the present invention.

[0021] Figure 7 This is a schematic diagram of the X-shaped extension structure in a fully automatic extension frame according to the present invention.

[0022] Figure 8 This is a schematic diagram of the first telescopic structure in a fully automatic telescopic frame of the present invention.

[0023] Figure 9This is a schematic diagram of the pulley system in a fully automatic extension frame according to the present invention.

[0024] Figure 10 This is a schematic diagram of the structure of the pull rope in a fully automatic extension frame according to the present invention.

[0025] Figure 11 This is a schematic diagram of the structure of a fully automatic extension frame with a second pull rope according to the present invention.

[0026] Figure 12 This is a schematic diagram of the X-shaped extension structure in the extended state of a fully automatic extension frame according to the present invention. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0029] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0030] In the description of the embodiments of the present invention, it should be noted that if terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use, they are only for the convenience of describing the present invention and 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, and therefore should not be construed as a limitation of the present invention. Furthermore, terms such as "first," "second," and "third" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0031] Furthermore, the use of terms such as "horizontal," "vertical," and "sag" does not imply that the component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0032] In the description of the embodiments of the present invention, "multiple" means at least two.

[0033] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.

[0034] Example

[0035] Combined with appendix Figure 1-12 A fully automatic extension frame includes a base plate 1, a lifting frame 2, a lifting drive mechanism disposed between the lifting frame 1 and the base plate 2, and an X-shaped extension structure slidably disposed on the lifting frame 1. Base bars 21 are provided at both the upper and lower ends of the base plate 1. The lifting drive mechanism includes a lifting drive rod 3, a drive motor 4, a cross-shaped steering gearbox 5, and a lifting transmission rod 6. The drive motor 4 drives the lifting drive rod 3 to rotate via the motor gearbox 7. Both ends of the lifting drive rod 3 are connected to the lifting transmission rod 6 via the cross-shaped steering gearbox 5, so that the lifting transmission rod 6 rotates synchronously when the lifting drive rod 3 rotates. Both ends of the lifting transmission rod 6 are connected to a Hawken linear mechanism 8. The driving end of the Hawken linear mechanism 8 is connected to the bottom of the lifting frame 2. A booster spring 9 is provided between the moving end of the Hawken linear mechanism 8 and the base plate 1. Rod seats are provided at both ends of the lifting transmission rod and the lifting drive rod on the base plate. A limit switch bracket 10 is provided at the connection between the cross-shaped steering gearbox 5 and the lifting transmission rod 6. A rise limit switch 11 and a retraction limit switch 12 are respectively provided on both sides of the lifting transmission rod 6.

[0036] The Hocken linear mechanism 8 includes a drive block 801 located at the end of the lifting drive rod 3. One end of the drive block 801 is hinged to a drive arm 802, and the other end of the drive arm 802 is hinged to a bracket 803 connected to the lifting frame 2. A connecting arm 804 is hinged to the middle of the drive arm 802, and the other end of the connecting arm 804 is hinged to the outside of the cross-shaped steering gearbox 5. The drive arm 802 includes a downwardly protruding arc-shaped arm 802a hinged to the drive block 801 and a straight arm 802b hinged to the bracket 803. The connecting arm 804 is hinged at the connection between the arc-shaped arm 802a and the straight arm 802b. 803 includes an L-shaped support frame 803a, one end of which is hinged to the drive arm 802 via a hinge block 803b. The lifting frame 2 is connected to the L-shaped support frame 803a. The L-shaped support frame 803a is connected to one end of the assist spring 9, and the other end of the assist spring 9 is connected to the bottom bar 21. The assist spring 9 includes a spring coil portion 901, one end of which is rotatably connected to the L-shaped support frame 803a via a connecting rod 1 902, and the other end is rotatably connected to the bottom bar 21 via a connecting rod 2 903. A spring insertion seat 904 corresponding to the connecting rod 2 903 is located on the bottom bar 21.

[0037] During implementation, the drive motor operates, and the motor gearbox distributes the lateral transmission power to the cross steering gearboxes on both sides through its internal worm gear reduction. The cross steering gearboxes further reduce the speed through their internal worm gears, changing the transmission direction and driving the lifting transmission rod. Simultaneously, the lifting transmission rod distributes power to the Hawken linear mechanisms at both ends, forming a four-point Hawken linear mechanism movement that causes the lifting frame to rise and fall synchronously at four points. The Hawken linear mechanism is characterized by evolving from rotational motion to linear motion. The drive block rotates 180°, making the drive end of the drive arm in a stable vertical lifting state. In addition, assist springs are set at all four points to assist the lifting action with less effort. The work done in the lifting and lowering actions is equal. The lifting is done by the assist springs and the motor simultaneously, while the lowering is done by the motor and the weight of the inner frame itself simultaneously.

[0038] The X-shaped extension structure includes a first telescopic structure 14, a second telescopic structure 15, a third telescopic structure 16, and a fourth telescopic structure 17 arranged in parallel. The first telescopic structure 14, the second telescopic structure 15, the third telescopic structure 16, and the fourth telescopic structure 17 are staggered to form an X shape. A drive gearbox 19 is provided in the middle and the ends are slidably connected to the lifting frame 2. An upper central gear 18 is provided in the middle of the first telescopic structure 14 and the second telescopic structure 15, and a lower central gear is provided in the middle of the third telescopic structure 16 and the fourth telescopic structure 17. The upper central gear 18 and the lower central gear are coaxial and rotate in opposite directions, driven by the drive gearbox 19. A rack 19 that meshes with the upper central gear 18 and the lower central gear is provided on the side wall of the first telescopic structure 14, the second telescopic structure 15, the third telescopic structure 16, and the fourth telescopic structure 17.

[0039] The second telescopic structure 15, the third telescopic structure 16, and the fourth telescopic structure 17 are all the same as the first telescopic structure 14. The first telescopic structure 14 includes a telescopic tube 1401 with a rack 19, a fiber rod 1402 inside the telescopic tube 1401, and a telescopic power assembly 20 on the telescopic tube 1401, so that the front end of the fiber rod 1402 extends out of the telescopic tube 1401 along the moving direction of the telescopic tube 1401.

[0040] The telescopic power assembly 20 includes a movable pulley 1 2001, a movable pulley 2002, a fixed pulley 1 2003, a fixed pulley 2004, and a pull rope 1 2005 and a pull rope 2006. Movable pulley 1 2001 is located inside the telescopic tube 1401 near the front end of the fiber rod 1402, and movable pulley 2002 is located at the other end of the telescopic tube 1401. Fixed pulley 1 2003 is located on the outside of one side of the telescopic tube 1401. Fixed pulley 2004 is... The telescopic tube 1401 is placed outside one end where the movable pulley 2002 is located. A movable end 2007 is provided on the outer wall of one end of the telescopic tube 1401 where the movable pulley 2002 is located. The pull rope 2005 passes through the movable end 2007 in sequence around the fixed pulley 2004 and the movable pulley 2001 and then connects to the rear end of the fiber rod. The pull rope 2006 passes through the movable end 2007 in sequence around the fixed pulley 2003 and the movable pulley 2002 and then connects to the rear end of the fiber rod 1402.

[0041] This embodiment can be used for the unfolding of a sunshade umbrella. In use, the four corners of the sunshade umbrella fabric are connected to the extended ends of each fiber rod. After the lifting frame is raised, the external gearbox drives the upper and lower central gears to rotate. The upper and lower central gears mesh with the rack and pinion, thereby driving the four telescopic tubes to extend outward. When the X-shaped extension mechanism extends outward, the upper and lower central gears drive the four telescopic structures to extend outward. The movable pulley 2001 at the front end of the telescopic tube moves forward with the telescopic structure, while the fixed pulley 2004 outside the telescopic tube remains stationary. The distance between the movable pulley 2001 and the fixed pulley 2004 is increased. The other end of the pull rope is fixed to the fiber rod, forming a situation where the telescopic tube extends with the fiber rod extending at twice the distance. When the X-shaped extension mechanism retracts inward, the upper and lower central gears drive the four telescopic structures to retract inward. The movable pulley 2002 at the rear end of the telescopic tube moves backward, while the fixed pulley 2003 outside the telescopic tube remains stationary. The distance between the movable pulley 2002 and the fixed pulley 2003 increases, and the other end of the pull rope is fixed to the fiber rod, causing the telescopic tube to move backward and drive the fiber rod to retract, with a distance of twice the distance. Because the extension pulley group and the retraction pulley group have opposite actions and functions, the wire rope is fixed at the same point, the motion multiple is the same, and they are used to form a complete closed loop motion. Furthermore, one wire rope is fixed at three points, resulting in two pulley groups being used simultaneously.

[0042] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A fully automatic extension frame, characterized in that, The device includes a base plate, a lifting frame, a lifting drive mechanism disposed between the lifting frame and the base plate, and an X-shaped extension structure slidably disposed on the lifting frame. The base plate has bottom bars at both ends. The lifting drive mechanism includes a lifting drive rod, a drive motor, a cross-shaped steering gearbox, and a lifting transmission rod. The drive motor drives the lifting drive rod to rotate via the motor gearbox. Both ends of the lifting drive rod are connected to the lifting transmission rod via the cross-shaped steering gearbox, so that the lifting transmission rod rotates synchronously when the lifting drive rod rotates. Both ends of the lifting transmission rod are connected to a Hawken linear mechanism. The driving end of the Hawken linear mechanism is connected to the bottom of the lifting frame, and an assist spring is disposed between the moving end of the Hawken linear mechanism and the base plate. The X-shaped extension structure includes a first telescopic structure, a second telescopic structure, a third telescopic structure, and a fourth telescopic structure arranged in parallel. The first, second, third, and fourth telescopic structures are staggered to form an X shape. A drive gearbox is located in the middle of the structure, and its end is slidably connected to the lifting frame. An upper central gear is located in the middle of the first and second telescopic structures, and a lower central gear is located in the middle of the third and fourth telescopic structures. The upper and lower central gears are coaxial and rotate in opposite directions. The upper and lower central gears are driven by the drive gearbox. Racks that mesh with the upper and lower central gears are provided on the side walls of the first, second, third, and fourth telescopic structures.

2. The fully automatic extension frame according to claim 1, characterized in that, A limit switch bracket is provided at the connection between the cross steering gearbox and the lifting transmission rod. The limit switch bracket is provided on both sides of the lifting transmission rod, with a lifting limit switch and a retraction limit switch respectively.

3. The fully automatic extension frame according to claim 1, characterized in that, The Hocken linear mechanism includes a drive block disposed at the end of the lifting drive rod. One end of the drive block is hinged to a drive arm, and the other end of the drive arm is hinged to a bracket connected to the lifting frame. A connecting arm is hinged to the middle of the drive arm, and the other end of the connecting arm is hinged to the outside of the cross steering gearbox.

4. The fully automatic extension frame according to claim 3, characterized in that, The drive arm includes a downwardly protruding arc-shaped arm hinged to the drive block and a straight arm hinged to the bracket, and the connecting arm is hinged at the connection between the arc-shaped arm and the straight arm.

5. A fully automatic extension frame according to claim 3, characterized in that, The bracket includes an L-shaped support frame, one end of which is hinged to the drive arm via a hinge block, and the lifting frame is connected to the L-shaped support frame.

6. The fully automatic extension frame according to claim 5, characterized in that, The L-shaped support frame is connected to one end of the assist spring, and the other end of the assist spring is connected to the bottom bar. The assist spring includes a spring coil portion, one end of which is rotatably connected to the L-shaped support frame via a connecting rod one, and the other end is rotatably connected to the bottom bar via a connecting rod two. The bottom bar has a spring insertion seat corresponding to the connecting rod two.

7. A fully automatic extension frame according to claim 2, characterized in that, The second, third, and fourth telescopic structures are all the same as the first telescopic structure. The first telescopic structure includes a telescopic tube with a rack, a fiber rod inside the telescopic tube, and a telescopic power assembly on the telescopic tube, so that the front end of the fiber rod extends out of the telescopic tube along the moving direction of the telescopic tube.

8. A fully automatic extension frame according to claim 7, characterized in that, The telescopic power assembly includes a movable pulley 1, a movable pulley 2, a fixed pulley 1, a fixed pulley 2, and a pull rope 1 and a pull rope 2. The movable pulley 1 is located inside the telescopic tube near the front end of the fiber rod, and the movable pulley 2 is located at the other end of the telescopic tube. The fixed pulley 1 is located on the outside of one side of the telescopic tube. The fixed pulley 2 is located outside the end of the telescopic tube where the movable pulley 2 is located. A movable end is provided on the outer wall of the end of the telescopic tube where the movable pulley 2 is located. The pull rope 1 passes through the movable end sequentially around the fixed pulley 2 and the movable pulley 1 before connecting to the rear end of the fiber rod. The pull rope 2 passes through the movable end sequentially around the fixed pulley 1 and the movable pulley 2 before connecting to the rear end of the fiber rod.

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