Elastic sliding structure acting on outer umbrella column and inner support pipe and super large outdoor umbrella

Abstract

The utility model discloses elastic sliding structure and super -large outdoor umbrella acting on outer umbrella column, inner support pipe, including outer umbrella column, inner support pipe, screw drive assembly, auxiliary sliding assembly, roof, ball slide, auxiliary sliding assembly includes fixed frame and dolly, be provided with first elastic member between fixed frame and dolly, when dolly is subjected to radial pressure, will move towards fixed frame, and then compress first elastic member, make the pulley have adaptive adjustment mechanism, the roof side is equipped with an installation gap, and the gap is equipped with second elastic member, when ball slide is subjected to pressure, ball slide will move to the inside of installation gap, and compress second elastic member, thereby effectively reduce the abnormal friction and vibration phenomenon caused by outer umbrella column, lifting pipe inner wall surface rough or partial uneven, further improved the stability and smoothness when using, and the ultimate user can enjoy more peaceful, comfortable environment experience, and the overall quality of product has improved.

Description

Technical Field

[0001] This utility model relates to the field of outdoor umbrella technology, and in particular to an elastic sliding structure acting on the outer umbrella column and the inner support tube, and an extra-large outdoor umbrella. Background Technology

[0002] Outdoor umbrellas primarily function to provide shade and rain protection, and are suitable for various leisure venues. However, with changing usage needs, existing small outdoor umbrellas are no longer sufficient to meet the needs of large groups of people, such as team building activities and gatherings.

[0003] Existing technology CN119214414A discloses an extra-large outdoor umbrella. When fully open, this umbrella can have a canopy diameter exceeding ten meters, covering a vast area. Therefore, it places extremely high demands on the load-bearing capacity and stability of the supporting structure. In particular, the pillars and lifting tubes, as core load-bearing components, must be able to withstand the enormous wind resistance and weight load generated when the umbrella is open. Simultaneously, due to the excessive height of the umbrella, the height of the pillars and lifting tubes also increases accordingly, making it particularly difficult to control the flatness of the inner wall surface during manufacturing.

[0004] Furthermore, these types of outdoor umbrellas are typically used under prolonged exposure to the natural environment, where external factors such as sunlight, rain, and temperature fluctuations continuously affect the materials. The thermal expansion and contraction effect causes minute deformations in the metal or composite materials of the uprights and lifting tubes, further reducing the smoothness of their surfaces. While these material-level changes may not be immediately noticeable, they become increasingly significant over time.

[0005] Ultimately, when users open or close the umbrella, the friction between the support column and the auxiliary pulley, and between the lifting tube and the auxiliary pulley, increases due to the uneven surfaces. This not only increases operational resistance but also easily leads to abnormal friction and vibration, generating harsh noise. This noise not only reduces the comfort of using the product but also affects the overall quality of the outdoor recreation environment and the user experience to some extent. Utility Model Content

[0006] This utility model aims to solve at least one of the technical problems existing in the prior art. To this end, a first aspect of this utility model proposes an elastic sliding structure acting on an outer umbrella column, including an outer umbrella column, an inner support tube, a screw drive assembly, and an auxiliary sliding assembly. The outer umbrella column serves as the supporting foundation of the overall structure and is firmly fixed to the ground or concrete base by anchor bolts or welding to provide stable load-bearing capacity. The inner support tube is coaxially installed into the inner cavity of the outer umbrella column in a liftable manner, maintaining an appropriate fitting clearance between the two. The screw drive assembly is installed in the internal space of the outer umbrella column and is mechanically connected to the inner support tube, its function being to achieve smooth lifting and lowering movement of the inner support tube via a motor drive. The auxiliary sliding assembly includes a fixed frame and a trolley. The fixed frame is installed on the outer wall of the inner support tube by welding or bolting, while the trolley maintains rolling contact with the inner wall of the outer umbrella column via pulleys. A first elastic element is installed between the fixed frame and the trolley. When the trolley is subjected to radial pressure, it moves towards the fixed frame, thereby compressing the first elastic element. This gives the pulley an adaptive adjustment mechanism, allowing it to dynamically adjust the contact method and pressure distribution according to the actual condition of the inner wall of the outer umbrella column. This effectively reduces abnormal friction and vibration caused by rough or uneven surfaces on the inner wall of the outer umbrella column. This improvement not only significantly reduces noise during operation but also further enhances the stability and smoothness of the outdoor recreational umbrella during use. Ultimately, it allows users to enjoy a quieter and more comfortable environment when resting or engaging in social activities outdoors, improving the overall product quality and user satisfaction.

[0007] According to some embodiments of the present invention, the fixing frame further includes a base plate, which is fixed to the outer surface of the inner support tube, and a first guide post is vertically installed on the base plate; According to some embodiments of the present invention, the trolley includes a chassis arranged opposite to a base plate, and a second guide post is mounted on the chassis, the second guide post being arranged opposite to a first guide post. According to some embodiments of this utility model, the first elastic element is usually a helical spring, with its two ends respectively sleeved on the outside of the first guide post and the second guide post, serving as a guide and a reset function.

[0008] According to some embodiments of the present invention, the fixing frame also includes two side plates, which are located on the left and right sides of the base plate respectively. Each side plate is machined with a through hole, and a fixing bolt is inserted between the two through holes.

[0009] According to some embodiments of the present invention, the trolley includes two side frame plates, which are located on the left and right sides of the chassis respectively. After the trolley is connected and installed with the fixed frame, the two side frame plates are located between the two side plates of the fixed frame. Each side frame plate has a transverse waist-shaped hole. The fixing bolt passes through the two waist-shaped holes at the same time, so that the trolley can move along the waist-shaped hole to limit the stroke of the spring being compressed.

[0010] According to some embodiments of this utility model, pulleys are installed between the upper and lower ends of the two side frame plates, and the pulleys contact the inner wall of the outer umbrella column to reduce motion friction. The second aspect of this utility model proposes an elastic sliding structure acting on an inner support tube, including an outer umbrella column, an inner support tube, a screw drive assembly, and a top plate; the outer umbrella column serves as the supporting foundation of the overall structure and is firmly fixed to the ground or concrete base by anchor bolts or welding to provide stable load-bearing capacity; the inner support tube is coaxially installed into the inner cavity of the outer umbrella column in a liftable manner, with an appropriate fitting clearance between the two; the screw drive assembly is installed in the internal space of the outer umbrella column and is mechanically connected to the inner support tube, and its function is to realize the smooth lifting and lowering movement of the inner support tube through motor drive. The lead screw drive assembly specifically includes a drive motor, a lead screw, and a lead screw nut. The drive motor is fixed to the bottom of the outer umbrella column by a bracket, and the lead screw nut is fixed to the bottom of the inner support tube by a mounting bracket. The lead screw and the lead screw nut are threaded together, and the bottom of the lead screw is connected to the output shaft of the drive motor. The top plate is securely installed and fitted inside the top opening of the inner support tube. At the same time, the top plate and the top of the lead screw are stably and flexibly connected, allowing the lead screw to rotate smoothly and efficiently relative to the top plate.

[0011] Considering the relatively high overall height of the lifting pipe, the length of the lead screw was adaptively increased to ensure system stability and coordination, thus matching the overall structural dimensions. Furthermore, the top plate plays a crucial role in this device, effectively preventing any swaying or instability that may occur during high-speed or continuous rotation of the lead screw, thereby ensuring the smooth operation and reliability of the entire mechanical system.

[0012] The top plate has an installation notch on its side, in which a second elastic element is installed. The ball slider is embedded in the installation notch, and the front end of the ball slider is equipped with a ball that keeps in contact with the inner wall of the inner support tube. The rear end of the ball slider abuts against the second elastic element.

[0013] According to some embodiments of this utility model, ear grooves are also provided on the left and right sides of the mounting notch, wherein the width of the mounting notch is A, the width of the ear groove is B, and B is less than A. According to some embodiments of this utility model, the ball slider is provided with ear blocks on the left and right sides respectively. The ear blocks are embedded in the ear grooves, wherein the width of the ear groove is B and the width of the ear block is C, C is less than B, so that the ear blocks can move in the ear grooves, and through the mutual cooperation between the ear blocks and the ear grooves, a limiting and guiding function is achieved.

[0014] According to some embodiments of the present invention, due to the presence of the ear block and the ear groove, in order to facilitate the installation of the ball block into the mounting notch, the top or bottom of the mounting notch is open, or both the top and bottom are open, and the ball block is installed into the mounting notch through the opening.

[0015] According to some embodiments of this utility model, a closing plate is installed at the top or bottom of the mounting notch, or both the top and bottom are installed with closing plates. The closing plate is fixed to the top plate with screws to form a complete accommodating space. According to some embodiments of this utility model, a central hole is opened in the center of the top plate, and the top end of the lead screw passes through the hole. A washer and a ball bearing are installed sequentially from top to bottom on the top end of the lead screw. A transverse through hole is also machined on the top end of the lead screw, and a cotter pin is installed in the hole. The cotter pin is located above the washer for axial positioning.

[0016] The third aspect of this utility model provides an extra-large outdoor umbrella, including the above-mentioned elastic sliding structure acting on the outer umbrella column and the above-mentioned elastic sliding structure acting on the inner support tube.

[0017] This utility model has at least the following beneficial effects: 1. A first elastic element is provided between the fixed frame and the trolley. When the trolley is subjected to radial pressure, it will move toward the fixed frame, thereby compressing the first elastic element. This gives the pulley an adaptive adjustment mechanism, allowing it to dynamically adjust the contact method and pressure distribution according to the actual condition of the inner wall of the outer umbrella column. This effectively reduces abnormal friction and vibration caused by rough or uneven surfaces of the inner wall of the outer umbrella column.

[0018] 2. When subjected to pressure, the ball block will move into the mounting notch and compress the second elastic element; thus, the ball block has an adaptive adjustment mechanism. The ball block can dynamically adjust the contact mode and pressure distribution according to the actual condition of the inner wall of the lifting tube, thereby effectively reducing abnormal friction and vibration caused by rough or uneven surfaces of the inner wall of the lifting tube.

[0019] 3. The extra-large outdoor umbrella, through the adaptive elastic adjustment of the auxiliary sliding component and ball bearing slider, not only significantly reduces the noise generated during operation, but also further improves the stability and smoothness of the outdoor leisure umbrella during use. Ultimately, it allows users to enjoy a quieter and more comfortable environment when resting or socializing outdoors, thus improving the overall quality of the product and user satisfaction.

[0020] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0021] The first and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic cross-sectional view of the first aspect of the present invention; Figure 2This is a schematic diagram of the auxiliary sliding component according to the first aspect of the present invention; Figure 3 for Figure 2 Schematic diagram of the AA section; Figure 4 This is an exploded view of the auxiliary sliding component according to the first aspect of the present invention; Figure 5 This is a schematic cross-sectional view of the second aspect of the present invention; Figure 6 for Figure 5 Enlarged diagram of B in the middle; Figure 7 This is a schematic diagram of the combined state of the top plate and the ball slider according to the second aspect embodiment of the present utility model; Figure 8 This is a schematic diagram of the top plate and ball block in an exploded state according to the second aspect embodiment of the present utility model; Figure 9 This is a side view of the top plate according to the second aspect of the present invention; Figure 10 for Figure 9 Schematic diagram of the CC section. Detailed Implementation

[0022] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0023] In the description of this utility model, the meaning of "first" is that "greater than", "less than", "exceeding", etc., are understood to exclude the stated number. If "first" and "second" are used in the description, they are only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features indicated, or implicitly indicating the order of the technical features indicated.

[0024] Reference Figures 1 to 3 As shown, the elastic sliding structure acting on the outer umbrella column includes an outer umbrella column 100, an inner support tube 200, a screw drive assembly 300, and an auxiliary sliding assembly 400. The outer umbrella column 100 serves as the supporting foundation of the overall structure and is firmly fixed to the ground or concrete base by anchor bolts or welding to provide stable load-bearing capacity. The inner support tube 200 is coaxially installed into the inner cavity of the outer umbrella column 100 in a liftable manner, with an appropriate fitting clearance between the two. The screw drive assembly 300 is installed in the internal space of the outer umbrella column 100 and is mechanically connected to the inner support tube 200. Its function is to realize the smooth lifting and lowering movement of the inner support tube 200 through motor drive. Reference Figures 2 to 4 As shown, the auxiliary sliding assembly 400 includes a fixed frame 410 and a trolley 420. The fixed frame 410 is installed on the outer wall of the inner support tube 200 by welding or bolting, while the trolley 420 maintains rolling contact with the inner wall of the outer umbrella column 100 via a pulley 421. A first elastic element 430 is provided between the fixed frame 410 and the trolley 420. When the trolley 420 is subjected to radial pressure, it moves towards the fixed frame 410, thereby compressing the first elastic element 430. This gives the pulley 421 an adaptive adjustment mechanism, allowing it to dynamically adjust the contact method and pressure distribution according to the actual state of the inner wall of the outer umbrella column 100. This effectively reduces abnormal friction and vibration caused by rough or uneven surfaces of the inner wall of the outer umbrella column 100. This improvement not only significantly reduces noise during operation but also further enhances the stability and smoothness of the outdoor leisure umbrella during use, ultimately allowing users to enjoy a quieter and more comfortable environment when resting or engaging in social activities outdoors, thus improving the overall quality of the product and user satisfaction.

[0025] Reference Figure 3 , 4 As shown, the fixing frame 410 further includes a base plate 411, which is fixed to the outer surface of the inner support tube 200, and a first guide post 412 is vertically installed on the base plate 411. The trolley 420 includes a chassis 422, which is arranged opposite to the base plate 411. A second guide post 423 is mounted on the chassis 422, and the second guide post 423 is arranged opposite to the first guide post 412. The first elastic element 430 is usually a helical spring, with its two ends respectively sleeved on the outside of the first guide post 412 and the second guide post 423, serving as a guide and a reset function.

[0026] Reference Figure 3 , 4 As shown, the fixing frame 410 also includes two side plates 413, which are located on the left and right sides of the base plate 411 respectively. Each side plate 413 has a through hole 403, and a fixing bolt 440 is inserted between the two through holes 403.

[0027] The trolley 420 includes two side frame plates 424, which are located on the left and right sides of the chassis 422 respectively. After the trolley 420 is connected and installed with the fixed frame 410, the two side frame plates 424 are located between the two side plates 413 of the fixed frame 410. Each side frame plate 424 has a transverse oblong hole 402. The fixing bolt 440 passes through the two oblong holes 402 at the same time, so that the trolley 420 can move along the oblong hole 402 to limit the stroke of the spring compression.

[0028] Reference Figure 3 , 4As shown, pulleys 421 are installed between the upper and lower ends of the two side frame plates 424. The pulleys 421 are in contact with the inner wall of the outer umbrella column 100 to reduce motion friction. Reference Figure 5 As shown, the elastic sliding structure acting on the inner support tube includes an outer umbrella column 100, an inner support tube 200, a screw drive assembly 300, a top plate 500, and a ball bearing slider 600. The outer umbrella column 100 serves as the supporting foundation of the overall structure and is firmly fixed to the ground or concrete base by anchor bolts or welding to provide stable load-bearing capacity. The inner support tube 200 is coaxially installed into the inner cavity of the outer umbrella column 100 in a liftable manner, with an appropriate fitting clearance between the two. The screw drive assembly 300 is installed in the internal space of the outer umbrella column 100 and is mechanically connected to the inner support tube 200. Its function is to realize the smooth lifting and lowering movement of the inner support tube 200 through motor drive. The lead screw drive assembly 300 specifically includes a drive motor 310, a lead screw 320, and a lead screw nut 330. The drive motor 310 is fixed to the bottom of the outer umbrella column 100 by a bracket, and the lead screw nut 330 is fixed to the bottom of the inner support tube 200 by a mounting bracket. The lead screw 320 and the lead screw nut 330 are threaded together, and the bottom of the lead screw 320 is connected to the output shaft of the drive motor 310. Referring to Figures 5 and 7, the top plate 500 is securely installed and fitted inside the top opening of the inner support tube 200. At the same time, the top plate 500 and the top of the lead screw 320 are stably and flexibly connected, allowing the lead screw 320 to rotate smoothly and efficiently relative to the top plate 500.

[0029] Considering the relatively high overall height of the lifting pipe, the length of the lead screw 320 has been adaptively increased to ensure system stability and coordination, thus matching the overall structural dimensions. Furthermore, the top plate 500 plays a crucial role in this device, effectively preventing any swaying or instability that may occur during high-speed or continuous rotation of the lead screw 320, thereby ensuring the smooth operation and reliability of the entire mechanical system.

[0030] Referring to Figures 8 to 10, a mounting notch 510 is provided on the side of the top plate 500. A second elastic element 520 is installed within this notch. A ball bearing slider 600 is embedded in the mounting notch 510. A ball bearing 610 is mounted at the front end of the ball bearing slider 600, maintaining contact with the inner wall of the inner support tube 200. The rear end of the ball bearing slider 600 abuts against the second elastic element 520. When subjected to pressure, the ball bearing slider 600 moves inward into the mounting notch 510, compressing the second elastic element 520. This gives the ball bearing slider 600 an adaptive adjustment mechanism, allowing it to dynamically adjust the contact method and pressure distribution according to the actual condition of the inner wall of the lifting tube. This effectively reduces abnormal friction and vibration caused by rough or uneven surfaces on the inner wall of the lifting tube. This improvement not only significantly reduces noise generation during operation but also further enhances the stability and smoothness of the outdoor leisure umbrella during use, ultimately allowing users to enjoy a quieter and more comfortable environment when resting or engaging in social activities outdoors, thus improving the overall product quality and user satisfaction.

[0031] Reference Figure 10 As shown, there are also ear grooves 530 on the left and right sides of the mounting notch 510. The width of the mounting notch 510 is A, and the width of the ear groove 530 is B, where B is less than A. The ball bearing slider 600 has ear blocks 620 on its left and right sides respectively. The ear blocks 620 are embedded in the ear grooves 530. The width of the ear grooves 530 is B, and the width of the ear blocks 620 is C, where C is less than B. This allows the ear blocks 620 to move within the ear grooves 530. The mutual cooperation between the ear blocks 620 and the ear grooves 530 serves as a limiting and guiding function.

[0032] Reference Figure 8 As shown, due to the presence of the ear block 620 and the ear groove 530, in order to facilitate the insertion of the ball slider 600 into the mounting notch 510, the top or bottom of the mounting notch 510 is open, or both the top and bottom are open, so that the ball slider 600 can be inserted into the mounting notch 510 through the opening.

[0033] After installation, a closing plate 540 is installed on the top or bottom of the installation notch 510, or both the top and bottom are fitted with closing plates 540. The closing plate 540 is fixed to the top plate 500 with screws to form a complete receiving space. Reference Figure 6 , 7 As shown, a central hole 550 is opened in the center of the top plate 500, through which the top end of the lead screw 320 passes. A washer 340 and a ball bearing 350 are installed sequentially from top to bottom on the top end of the lead screw 320. A transverse through hole 321 is also machined on the top end of the lead screw 320, and a cotter pin 360 is installed in the hole. The cotter pin 360 is located above the washer 340 and is used for axial positioning.

[0034] The extra-large outdoor umbrella includes the aforementioned elastic sliding structure acting on the outer umbrella column and the aforementioned elastic sliding structure acting on the inner support tube.

[0035] In the description of this specification, references to terms such as "some embodiments" or "as one might imagine" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the first-described terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one embodiment or example.

[0036] The first page describes the embodiments of the present utility model in detail with reference to the accompanying drawings. However, the present utility model is not limited to the first described embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. An elastic sliding structure acting on an outer umbrella column, characterized in that, include: An outer umbrella column (100) is fixed to the ground or a base; An inner support tube (200) is inserted into the outer umbrella column (100); A lead screw drive assembly (300) is installed inside the outer umbrella column (100) and connected to the inner support tube (200). The lead screw drive assembly (300) is used to lift and move the inner support tube (200). An auxiliary sliding assembly (400) includes a fixed frame (410) and a trolley (420). The trolley (420) is mounted on the fixed frame (410). A first elastic element (430) is installed between the fixed frame (410) and the trolley (420). When the trolley (420) is compressed, it moves toward the fixed frame (410) and compresses the first elastic element (430). The fixing frame (410) is fixed to the outer wall of the inner support tube (200), and the trolley (420) is equipped with a pulley (421), which is in contact with the inner wall of the outer umbrella column (100).

2. The elastic sliding structure acting on the outer umbrella column according to claim 1, characterized in that, The fixing frame (410) includes a base plate (411), which is fixed to the outer wall of the inner support tube (200), and a first guide post (412) is mounted on the base plate (411). The trolley (420) includes a chassis (422) located on the opposite side of the base plate (411), and a second guide post (423) is mounted on the chassis (422), the second guide post (423) being arranged opposite to the first guide post (412); The two ends of the first elastic element (430) are respectively fitted onto the first guide post (412) and the second guide post (423).

3. The elastic sliding structure acting on the outer umbrella column according to claim 2, characterized in that, The fixing frame (410) includes two side plates (413), which are respectively disposed on the left and right sides of the base plate (411). Each of the two side plates (413) has a through hole (403), and a fixing bolt (440) is inserted between the two through holes (403). The trolley (420) includes two side frame plates (424), which are located between two side plates (413) and are disposed on the left and right sides of the chassis (422). Both of the side frame plates (424) have transversely arranged waist-shaped holes (402), and the fixing bolts (440) also pass through the two waist-shaped holes (402).

4. The elastic sliding structure acting on the outer umbrella column according to claim 3, characterized in that, The pulleys (421) are installed between the upper and lower ends of the two side frame plates (424).

5. The elastic sliding structure acting on the outer umbrella column according to claim 1, characterized in that, The lead screw drive assembly (300) includes a drive motor (310), a lead screw (320), and a lead screw nut (330). The drive motor (310) is fixed inside the outer umbrella column (100) by a bracket. The lead screw nut (330) is fixed to the bottom port of the inner support tube (200) by the mounting bracket. The lead screw nut (330) is threaded into the lead screw (320). The bottom end of the lead screw (320) is connected to the drive motor (310).

6. An elastic sliding structure acting on an inner support tube, characterized in that, include: An outer umbrella column (100) is fixed to the ground or a base; An inner support tube (200) is inserted into the outer umbrella column (100); A lead screw drive assembly (300) is installed inside the outer umbrella column (100) and connected to the inner support tube (200). The lead screw drive assembly (300) is used to lift and move the inner support tube (200). The lead screw drive assembly (300) includes a lead screw (320). A top plate (500) is fixed inside the top end of the inner support tube (200). The top end of the lead screw (320) is rotatably mounted on the top plate (500), causing the lead screw (320) to rotate relative to the top plate (500). The side of the top plate (500) is provided with an installation notch (510), and a second elastic element (520) is installed in the installation notch (510). A ball bearing slider (600) is installed in the mounting notch (510). The front end of the ball bearing slider (600) is fitted with balls (610), and the balls (610) are in contact with the inner wall of the inner support tube (200). The rear end of the ball block (600) contacts the second elastic element (520). After being pressed, the ball block (600) moves into the mounting notch (510) and compresses the second elastic element (520).

7. The elastic sliding structure acting on the inner support tube according to claim 6, characterized in that, The mounting notch (510) has ear grooves (530) on its left and right sides, and the width of the ear grooves (530) is smaller than the width of the mounting notch (510). The ball block slider (600) has ear blocks (620) on its left and right sides. The ear blocks (620) are inserted into the ear grooves (530). The width of the ear blocks (620) is smaller than the width of the ear grooves (530). The top and bottom of the mounting notch (510) are respectively fitted with a sealing plate (540), and the sealing plate (540) is fixedly connected to the top plate (500) by screws.

8. The elastic sliding structure acting on the inner support tube according to claim 6, characterized in that, The lead screw drive assembly (300) also includes a drive motor (310) and a lead screw nut (330). The drive motor (310) is fixed inside the outer umbrella column (100) by a bracket. The lead screw nut (330) is fixed inside the bottom port of the inner support tube (200) by a mounting bracket. The lead screw nut (330) is internally threaded into the lead screw (320). The bottom end of the lead screw (320) is connected to the drive motor (310).

9. The elastic sliding structure acting on the inner support tube according to claim 6, characterized in that, The top plate (500) has a central hole (550) in the center, and the top end of the lead screw (320) passes through the central hole (550); The top of the lead screw (320) is equipped with a washer (340) and a ball bearing (350) from top to bottom. The top of the lead screw (320) is provided with a transverse through hole (321). A cotter pin (360) is installed in the through hole (321). The cotter pin (360) is located above the washer (340).

10. An extra-large outdoor umbrella, characterized in that: It includes the elastic sliding structure acting on the outer umbrella column as described in any one of claims 1 to 5 and the elastic sliding structure acting on the inner support tube as described in any one of claims 6 to 9.

Images