Rotation limiting structure of cantilever umbrella

Abstract

The utility model discloses a rotation limiting structure of a cantilever umbrella, which comprises a reducing sleeve, a rotating piece and a worm, the rotating piece and the worm are both rotatably arranged in the reducing sleeve, the end part of the rotating piece is connected to a cantilever rod of the cantilever umbrella, and the end part of the rotating piece is connected with the worm. A worm tooth section meshed with the worm is arranged on the outer wall of the rotating part in the circumferential direction, the worm drives the cantilever rod to rotate in the circumferential direction of the cantilever rod through the rotating part, and the worm and the worm tooth section are matched to limit the rotating angle of the rotating part in the circumferential direction. Therefore, the rotation range of the cantilever rod in the circumferential direction is limited. The cantilever umbrella is simple in structure and has the effect of reducing the production cost of the cantilever umbrella.

Description

Technical Field

[0001] The present application relates to the technical field of cantilever umbrellas, and in particular to a rotation limiting structure of a cantilever umbrella. Background Art

[0002] The cantilever umbrella comprises a column, a cantilever and an umbrella canopy. One end of the cantilever is sleeved and slid on the peripheral side of the column, the umbrella canopy is installed on the other end of the cantilever, and a driving device for controlling the opening direction of the umbrella canopy is provided in the cantilever. The patent name in the prior art is cantilever umbrella (application number is 201920671057 2), comprising: a column, a canopy and a cantilever, one end of the cantilever is rotatably connected to the column through a shell, and the other end is connected to the canopy, and the canopy is driven to rotate by rotating the cantilever so that the canopy opening rotates by an angle relative to the horizontal direction; and also comprising a limiting member, one end of the limiting member is fixedly connected to the cantilever, and the other end extends into the shell, the inner wall of the shell is provided with a first limiting portion, and the limiting member is provided with a second limiting portion, the first limiting portion and the second limiting portion cooperate to limit the rotation range of the cantilever in its circumferential direction, the first limiting portion is at least two limiting bosses arranged along the circumference of the inner wall of the cantilever shell, a limiting space is formed between the at least two limiting bosses, the end of the second limiting portion is inserted into the limiting space, and the movement range of the second limiting portion is limited between two adjacent limiting bosses, and the canopy rotation limiting structure comprises a worm and a worm wheel, the worm is rotatably installed in the cantilever shell, and the worm has one end exposed from the cantilever shell, and the end is used to connect the rocker handle, so that the rocker handle controls the rotation of the worm. The worm wheel is sleeved on the outer side of the limiter and fixedly connected with the limiter. The worm wheel is meshed with the worm, and the worm drives the worm wheel to rotate. When the worm is connected to the crank handle, the crank handle drives the worm to rotate, the worm drives the worm wheel to rotate, the worm wheel drives the limiter to rotate, and the limiter drives the cantilever to rotate, so that the opening and closing direction of the umbrella canopy rotates; from the above description, it can be seen that when the cantilever needs to rotate, one end of the crank handle is connected to the outer end of the worm, and then the crank handle is shaken to drive the worm to rotate. Under the interaction between the worm and the turbine, the turbine rotates to drive the limiter to rotate, thereby driving the cantilever to rotate, and then moves in the limit space formed by the cooperation of the second limit part and the two limit bosses of the first limit part, so as to control the rotation angle of the cantilever, thereby achieving the effect of controlling the steering angle of the umbrella canopy. However, the defect of the above cantilever umbrella is that since the first limit part needs to be set on the inner wall of the shell, and the limiter with the second limit part is set, the structural design is relatively complicated and the production cost is high. Utility Model Content

[0003] The utility model aims to provide a rotation limiting structure for a cantilever umbrella in view of the defects and shortcomings of the prior art.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] It includes an adapter sleeve, a rotating member and a worm gear, wherein the rotating member and the worm gear are both rotatably arranged in the adapter sleeve, the end of the rotating member is connected to the cantilever rod of the cantilever umbrella, the outer wall of the rotating member is provided with a worm gear segment meshing with the worm gear along the circumferential direction, the worm gear drives the cantilever rod to rotate along the circumferential direction of the cantilever rod through the rotating member, and the worm gear cooperates with the worm gear segment to limit the rotation angle of the rotating member in the circumferential direction, thereby limiting the rotation range of the cantilever rod in its circumferential direction.

[0006] Preferably, the worm gear segment includes a plurality of tooth grooves evenly distributed along the circumferential direction of the rotating member, and a worm tooth meshing with the worm is formed between two adjacent tooth grooves.

[0007] Preferably, it also includes a connecting sleeve, which cooperates and connects the cantilever rod of the cantilever umbrella with the rotating member.

[0008] Preferably, bearings are respectively sleeved and fixed on the outer circumferences of both ends of the rotating member, and the outer circumferences of the bearings are fixed to the inner circumference of the adapter sleeve.

[0009] Preferably, one end of the rotating member is inserted into the connecting sleeve, an annular groove is provided on the circumferential side of the end of the rotating member, a retaining spring is embedded and fixed in the annular groove, and the rotating member is locked with the connecting sleeve through the retaining spring.

[0010] Preferably, the adapter sleeve is provided with a through hole for the worm to cooperate with, and a first bushing and a second bushing are provided at both ends of the through hole. The worm is installed in the through hole through the first bushing and the second bushing, and a polygonal hole is provided on the end face of one end of the worm.

[0011] In summary, the beneficial technical effects of this application are:

[0012] When the cantilever rod needs to be rotated (i.e., to adjust the angle of the canopy of the cantilever umbrella), the worm is driven to rotate. During the rotation of the worm, the worm engages with the worm tooth segment of the rotating part for transmission, so that the rotating part rotates in the adapter sleeve, thereby driving the cantilever rod to rotate. When the rotating part has reached its stroke, the end of the worm tooth segment engages with the worm, and the worm can no longer drive the rotating part to rotate, so that the cantilever rod does not rotate, thereby limiting the rotation angle of the cantilever rod, that is, achieving the rotation limit of the canopy of the cantilever umbrella. In summary, compared with the prior art, the present application directly limits the rotation angle of the canopy by engaging the worm with the worm tooth segment provided on the rotating part, which has a simple structure and reduced production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the cantilever umbrella of the utility model;

[0014] Figure 2It is a cross-sectional schematic diagram of the rotation limiting structure of the utility model;

[0015] Figure 3 It is an exploded schematic diagram of the rotation limiting structure of the utility model.

[0016] In the figure: 1. column; 2. sliding seat; 3. rotation limiting structure; 4. cantilever rod; 5. adapter sleeve; 6. worm; 7. rotating member; 8. connecting sleeve; 9. adapter; 10. sleeve; 11. through hole; 12. driving rod; 13. limiting rod; 14. locking rod; 15. tooth groove; 16. bearing; 17. annular groove; 18. retaining spring; 19. abutment ring; 20. first bushing; 21. second bushing; 22. worm gear segment; 23. polygonal hole. DETAILED DESCRIPTION

[0017] The utility model is further described below in conjunction with the accompanying drawings.

[0018] The embodiment of the present application discloses a cantilever umbrella.

[0019] Reference Figure 1 , including a column 1, a slide 2, a rotation limiting structure 3 and a cantilever rod 4. The slide 2 slides vertically on the peripheral side of the column 1, the rotation limiting structure 3 is located between the cantilever rod 4 and the slide 2, and the end of the cantilever rod 4 away from the column 1 is connected to the umbrella canopy.

[0020] Reference Figure 2 and Figure 3 The rotation limiting structure 3 includes an adapter sleeve 5, a worm 6, a rotating member 7 and a connecting sleeve 8. The adapter sleeve 5 is composed of an adapter 9 and a sleeve 10. The adapter 9 and the sleeve 10 are integrally arranged. The rotating member 7 can be rotatably placed in the sleeve 10. A through hole 11 is formed through the side wall of the sleeve 10. The worm 6 is rotatably connected in the through hole 11. The worm 6 and the rotating member 7 are perpendicular to each other. The rotating member 7 is composed of a driving rod 12, a limiting rod 13 and a locking rod 14. The limiting rod 13 is integrally arranged between the driving rod 12 and the locking rod 14. The peripheral side of the limiting rod 13 is provided for one end of the connecting sleeve 8 to be sleeved and fixed. The outer peripheral side of the cross-section of the connecting sleeve 8 away from one end of the adapter sleeve 5 is a regular hexagon. One end of the cantilever rod 4 is sleeved and fixed to the outer peripheral side of the outer end of the connecting sleeve 8.

[0021] The driving rod 12 is provided with a worm gear segment 22 along the circumferential direction. The worm gear segment 22 includes a plurality of tooth grooves 15 evenly distributed along the circumferential direction of the driving rod 12. A worm gear meshing with the worm 6 is formed between two adjacent tooth grooves 15. When the cantilever rod 4 needs to rotate, the worm 6 is driven to rotate. During the rotation of the worm 6, the worm 6 meshes with the worm gear segment 22 of the rotating member 7 to drive the rotating member 7 to rotate in the adapter sleeve 5, thereby driving the cantilever rod 4 to rotate. When the rotating member 7 reaches the right stroke, the end of the worm gear segment 22 meshes with the worm 6, and the worm 6 cannot continue to drive the rotating member 7 to rotate, so that the cantilever rod 4 will not rotate, thereby limiting the rotation angle of the cantilever rod 4, that is, realizing the rotation limit of the umbrella canopy of the cantilever umbrella. In summary, compared with the prior art, the present application directly limits the rotation angle of the umbrella canopy by meshing the worm 6 with the worm gear segment 22 provided on the rotating member 7, which has a simple structure and reduced production costs.

[0022] The circumference of both ends of the driving rod 12 is respectively sleeved with bearings 16, and the outer ring of the bearing 16 is clamped and fixed to the inner circumference of the sleeve 10. When the rotating member 7 rotates under the drive of the worm 6, it can rotate easily under the action of the two bearings 16.

[0023] The locking rod 14 has an annular groove 17 formed around its circumference, and a retaining spring 18 is fixedly connected in the annular groove 17, so that the rotating member 7 is locked with the connecting sleeve 8 through the retaining spring 18. The retaining spring 18 locks one end of the rotating member 7 in the connecting sleeve 8.

[0024] An abutment ring 19 is integrally provided on the outer circumference of the connecting sleeve 8, and one end face of the cantilever rod 4 abuts against the side wall of the abutment ring 19. When installing the cantilever rod 4, one end of the cantilever rod 4 is sleeved on the outer circumference of the connecting sleeve 8 until one end of the cantilever rod 4 abuts against the side wall of the abutment ring 19, thereby reminding that the cantilever rod 4 is installed. Preferably, in this embodiment, the cantilever rod 4 is fixedly connected to the connecting sleeve 8.

[0025] A first bushing 20 is threadedly fixed to one end of the through hole 11, and a second bushing 21 is inserted and fixed to the other end of the through hole 11. One end of the worm 6 is rotatably connected to one end of the first bushing 20. The second bushing 21 is sleeved on the circumferential side of the worm 6 away from the end of the first bushing 20. The worm 6 has a polygonal hole 23 on the end face close to the end of the second bushing 21. The polygonal hole 23 is a regular quadrilateral hole. The user can control the rotation of the worm by using an operating tool adapted to the regular quadrilateral hole.

[0026] The above description is only a preferred embodiment of the present utility model, so all equivalent changes or modifications made according to the structure, features and principles described in the scope of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A rotation limiting structure of a cantilever umbrella, characterized in that: The invention comprises an adapter sleeve (5), a rotating member (7) and a worm (6); the rotating member (7) and the worm (6) are both rotatably arranged in the adapter sleeve (5); the end of the rotating member (7) is connected to a cantilever rod (4) of a cantilever umbrella; a worm tooth segment (22) meshing with the worm (6) is arranged on the outer wall of the rotating member (7) in the circumferential direction; the worm (6) drives the cantilever rod (4) to rotate in the circumferential direction of the cantilever rod (4) through the rotating member (7); the worm (6) cooperates with the worm tooth segment (22) to limit the rotation angle of the rotating member (7) in the circumferential direction, thereby limiting the rotation range of the cantilever rod (4) in its circumferential direction.

2. The rotation limiting structure of a cantilever umbrella according to claim 1, characterized in that: The worm gear segment (22) comprises a plurality of tooth grooves (15) evenly distributed along the circumferential direction of the rotating member (7), and a worm tooth meshing with the worm (6) is formed between two adjacent tooth grooves (15).

3. The rotation limiting structure of a cantilever umbrella according to claim 1, characterized in that: It also comprises a connecting sleeve (8), wherein the connecting sleeve (8) cooperates to connect the cantilever rod (4) of the cantilever umbrella with the rotating member (7).

4. The rotation limiting structure of a cantilever umbrella according to claim 1, characterized in that: Bearings (16) are respectively sleeved and fixed on the outer circumference sides of both ends of the rotating member (7), and the outer circumference sides of the bearings (16) are fixed to the inner circumference sides of the adapter sleeve (5).

5. The rotation limiting structure of a cantilever umbrella according to claim 3, characterized in that: One end of the rotating member (7) is inserted into the connecting sleeve (8), and a ring groove (17) is provided on the circumferential side of the end of the rotating member (7). A retaining spring (18) is embedded and fixed in the ring groove (17), and the rotating member is locked in engagement with the connecting sleeve (8) via the retaining spring (18).

6. The rotation limiting structure of a cantilever umbrella according to claim 1, characterized in that: The adapter sleeve (5) is provided with a through hole (11) for the worm (6) to cooperate with, and a first bushing (20) and a second bushing (21) are provided at both ends of the through hole. The worm (6) is installed in the through hole through the first bushing (20) and the second bushing (21), and a polygonal hole (23) is provided on the end surface of one end of the worm (6).

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