Automatic sunshade curtain rewinding structure with buffering damping function

Abstract

An automatic sunshade curtain rewinding structure with buffer damping comprises a winding drum box and a mounting assembly, and the mounting assembly is used for mounting the winding drum box on an automobile window; a first end cover and a second end cover are installed at the two ends of the furling barrel box respectively, a roller shutter pipe is arranged in the furling barrel box, a shaft head is fixed to the inner side of the first end cover, and the two ends of the roller shutter pipe are installed on the shaft head of the first end cover and the second end cover respectively in a rotating mode. In conclusion, through the arrangement of the buffer damping assembly, small damping force is provided at the initial rewinding section of the sunshade curtain, the initial rewinding process is rapid and smooth, good user experience is guaranteed, the damping effect is gradually enhanced at the tail rewinding section, the phenomenon that the sunshade curtain batten collides with the winding drum box at a high speed is effectively restrained, and the safety of the sunshade curtain is improved. Damage and noise caused by violent collision of the structure are avoided, the service life of the product is remarkably prolonged, and meanwhile the silence and comfort of the riding environment are greatly improved.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile sunshades, and in particular relates to an automatic rewinding structure of a sunshade with buffer damping. Background Art

[0002] In the prior art, car sunshades generally use torsion springs as the core rewinding power source; however, car sunshades with this structural design have the following defects during use: in the process of releasing stored energy to achieve the retraction of the sunshade, especially at the end of retraction, the rewinding force of the torsion spring is often too large and difficult to effectively buffer. This excessive recovery force will directly act on the storage box, causing the box structure to bear excessive impact stress, which is prone to damage risks such as deformation and cracking of the box under long-term action; at the same time, the end of the sunshade or the curtain and the internal structure of the box will collide violently under high speed and high impact force, which will inevitably produce uncomfortable noise problems and affect the driving experience. Summary of the Invention

[0003] The present invention aims to provide an automatic rewinding structure for a sunshade with buffer damping, so as to solve the technical problems of stress damage and noise generation caused by excessive rewinding force of a torsion spring structure in existing automobile sunshades.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] A sunshade automatic rewinding structure with buffer damping includes a rewinding drum box and a mounting assembly, wherein the mounting assembly is used to mount the rewinding drum box on a vehicle window; a first end cap and a second end cap are mounted on both ends of the rewinding drum box, a curtain tube is disposed inside the rewinding drum box, a shaft head is fixed to the inner side of the first end cap, and the two ends of the curtain tube are rotatably mounted on the shaft head of the first end cap and the second end cap, respectively; a torsion spring is disposed inside the curtain tube, one end of the torsion spring is fixedly connected to the end of the shaft head, and the other end of the torsion spring is connected to the curtain tube;

[0006] The second end cover is also provided with a buffer damping assembly, which acts on the end of the rolling curtain tube; a sunshade is wound on the rolling curtain tube, and a slit is opened in the winding drum box along the axial direction, and the end of the sunshade passes outward from the slit, and the end of the sunshade is connected to a strip, and a hook handle is provided on the strip.

[0007] Furthermore, the inner wall of the rolling curtain tube is an internal spline, and a first external spline sleeve is mounted on the shaft head of the first end cover, and the first external spline sleeve can rotate relative to the shaft head. A second external spline sleeve is rotatably mounted on the second end cover, and the two ends of the rolling curtain tube are spline-connected with the first external spline sleeve and the second external spline sleeve respectively; a sliding sleeve is provided in the rolling curtain tube to cooperate with its spline, and the sliding sleeve has an external spline, and the end of the torsion spring is connected to the sliding sleeve.

[0008] Furthermore, the buffer damping assembly includes an assembly cover and a reduction gear set, and the assembly cover is used to assemble the reduction gear set on the outer side of the second end cover by a plurality of bolts; the outer side of the second end cover is fixed with a first fixed shaft and a second fixed shaft;

[0009] The reduction gear set includes a driving gear, a driven gear and a duplex gear, wherein the driving gear is connected to the second external spline sleeve hub, the duplex gear is rotatably mounted on the first fixed shaft, the duplex gear is composed of a large gear and a small gear, and the driven gear is rotatably mounted on the second fixed shaft;

[0010] The driving gear is meshed with the large gear, and the small gear is meshed with the driven gear. The radius of the driving gear is smaller than that of the large gear, and the radius of the small gear is smaller than that of the driven gear.

[0011] A spring is installed on the inner side of the assembly cover, and the spring acts on the driven gear.

[0012] Furthermore, an assembly circular hole is opened on the second end cover, and a spline short tube is fixed to the end face of the second external spline sleeve, and the spline short tube is installed in the assembly circular hole and can rotate; a spline shaft is fixed to the end of the driving gear, and the spline shaft is spline-matched with the spline short tube.

[0013] Furthermore, the gear ratio of the driving gear to the large gear is 1:3, and the gear ratio of the small gear to the driven gear is 1:4.

[0014] Furthermore, the rolling curtain tube is composed of an inner spline tube and a tapered reducer tube, and the tapered reducer tube is sleeved and fixed on the outer wall of the inner spline tube.

[0015] Furthermore, the hook handle is hingedly mounted on the middle of the slat.

[0016] Furthermore, the mounting assembly includes an inner shell and an outer shell, an installation clamping space is formed between the inner shell and the outer shell, and a plurality of screws are connected between the inner shell and the outer shell; the reel box is fixedly mounted on the inner shell.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] (1) The present invention adopts a rolling tube design consisting of an inner spline tube and a tapered reducer, which is designed to take into account the fan-shaped structure of the front window of the car. This allows the sunshade to form a fan-shaped expansion effect during the expansion process, better fit the contour of the car window, and improve the sunshade effect and aesthetics. In addition, the hook handle is hingedly mounted in the middle of the slat and can be rotated to a storage position parallel to the slat when not in use, effectively avoiding the risk of protrusion and collision, and improving the convenience and safety of use.

[0019] (2) The present invention provides a buffer damping assembly to provide a smaller damping force at the beginning of the sunshade curtain retraction, so that the retraction process starts quickly and smoothly, ensuring a good user experience, and gradually enhances the damping effect at the end of the retraction, effectively suppressing the phenomenon of the sunshade curtain strips colliding with the reel box at high speed, avoiding damage and noise caused by violent collision of the structure, not only significantly extending the service life of the product, but also greatly improving the quietness and comfort of the riding environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0021] Figure 1 This is an axonometric diagram of an automatic rewinding structure of a sunshade with buffer damping according to the present invention;

[0022] Figure 2 This is an axonometric drawing from another perspective of an automatic rewinding structure of a sunshade with buffer damping according to the present invention;

[0023] Figure 3 This is a schematic diagram of the structure of an automatic rewinding structure of a sunshade with buffer damping after removing the outer shell;

[0024] Figure 4 This is a schematic diagram of the structure of an automatic rewinding structure of a sunshade with buffer damping after the installation components are removed;

[0025] Figure 5 This is a schematic diagram of the connection between the roller blind tube and the sunshade curtain;

[0026] Figure 6 This is a schematic diagram of the installation of the buffer damping assembly on the second end cover;

[0027] Figure 7 This is an exploded view of the buffer damping assembly;

[0028] Figure 8 The figure is a connection diagram of the rolling curtain tube;

[0029] Figure 9 for Figure 8 Enlarged view of K in the middle;

[0030] Figure 10 for Figure 8 Enlarged view of point J in the middle.

[0031] Figure numbers: 1. Winding drum box; 2. Mounting assembly; 3. First end cover; 4. Second end cover; 5. Rolling curtain tube; 6. Torsion spring; 7. Sunshade; 8. Slit hole; 9. Slat; 10. Hook handle; 12. First external spline sleeve; 13. Second external spline sleeve; 14. Sliding sleeve; 15. Shaft head; 16. Buffer damping assembly; 17. Assembly cover; 18. Reduction gear set; 19. First fixed shaft; 20. Second fixed shaft; 21. Driving gear; 22. Driven gear; 23. Double gear; 24. Large gear; 25. Small gear; 26. Spring; 27. Assembly circular hole; 28. Spline short tube; 29. ​​Spline shaft; 30. Inner spline tube; 31. Tapered reducer; 32. Inner jacket; 33. Outer jacket. DETAILED DESCRIPTION

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] The present invention is described in further detail below with reference to the examples.

[0034] Specific embodiment 1 of the automatic rewinding structure of a sunshade with buffer damping provided by the present invention:

[0035] like Figure 1-10 As shown, an automatic rewinding structure of a sunshade with buffer damping includes a rewinding drum box 1 and an installation component 2, wherein the installation component 2 is used to install the rewinding drum box 1 on a car window; a first end cover 3 and a second end cover 4 are respectively installed at both ends of the rewinding drum box 1, a roller blind tube 5 is provided inside the rewinding drum box 1, and an axle head 15 is fixed to the inner side of the first end cover 3.

[0036] The specific installation structure of the curtain tube 5 located in the winding drum box 1 is as follows: the inner wall of the curtain tube 5 is an internal spline 30, and the shaft head 15 of the first end cover 3 is fitted with a first external spline sleeve 12, which can rotate relative to the shaft head 15; the second end cover 4 is provided with an assembly circular hole 27, in which a spline short tube 28 that can rotate around its axis is installed, and a second external spline sleeve 13 is fixed to the end of the spline short tube 28; the two ends of the curtain tube 5 are spline-connected to the first external spline sleeve 12 and the second external spline sleeve 13 respectively, thereby realizing its rotatable support.

[0037] A torsion spring 6 and a sliding sleeve 14 are provided in the rolling curtain tube 5. The sliding sleeve 14 has an external spline and cooperates with the rolling curtain tube 5 through the spline. It can rotate with the rolling curtain tube 5 and slide axially at the same time. The torsion spring 6 is a coil spring. One end of the torsion spring 6 is fixedly connected to the shaft head 15, and the other end of the torsion spring 6 is connected to the sliding sleeve 14. The torsion spring 6 is used to provide a rewinding torque after the sunshade 7 is released.

[0038] A sunshade curtain 7 is wound on the roller blind tube 5, and a slit hole 8 is opened in the axial direction of the winding drum box 1. The end of the sunshade curtain 7 passes outward from the slit hole 8. The end of the sunshade curtain 7 is connected to a strip board 9, and a hook handle 10 is provided on the strip board 9 to facilitate the user to pull out and hang the sunshade curtain 7.

[0039] In order to alleviate the impact force at the end of the retraction of the sunshade 7, a buffer damping assembly 16 is also provided on the second end cover 4. The buffer damping assembly 16 acts on the end of the rolling curtain tube 5. When the rolling curtain tube 5 is about to be retracted into the reel box 1, the buffer damping assembly 16 provides a reverse damping torque.

[0040] like Figure 6 and Figure 7 As shown, the buffer damping assembly 16 includes an assembly cover 17 and a reduction gear set 18. The assembly cover 17 assembles the reduction gear set 18 on the outside of the second end cover 4 through a number of bolts; the outer side of the second end cover 4 is fixed with a first fixed shaft 19 and a second fixed shaft 20.

[0041] The reduction gear set 18 includes a driving gear 21, a driven gear 22, and a duplex gear 23. The driving gear 21 is spline-connected to a splined short tube 28 via a spline shaft 29 fixed at its end, and is then linked to the second external spline sleeve 13. The duplex gear 23 is rotatably mounted on the first fixed shaft 19. The duplex gear 23 consists of a large gear 24 and a small gear 25. The driven gear 22 is rotatably mounted on the second fixed shaft 20.

[0042] Among them, the driving gear 21 is meshed with the large gear 24, and the small gear 25 is meshed with the driven gear 22. The radius of the driving gear 21 is smaller than the radius of the large gear 24, and the radius of the small gear 25 is smaller than the radius of the driven gear 22, forming a two-stage reduction structure; preferably, the gear ratio of the driving gear 21 to the large gear 24 is 1:3, and the gear ratio of the small gear 25 to the driven gear 22 is 1:4, thereby achieving a total reduction ratio of 1:12.

[0043] A spring 26 is installed inside the assembly cover 17 , and the spring 26 acts on the driven gear 22 to provide a damping torque during the rewinding process of the sunshade curtain 7 .

[0044] When the automatic rewinding structure of the sunshade with buffer damping of this embodiment is in use, the user installs the rewinding drum box 1 on the car window, such as the front window of the car, through the installation component 2. At this time, the rewinding drum box 1 is fixed to the B-pillar of the car. There is also a matching hanging ring (which can be installed on the A-pillar of the car), and the hanging ring cooperates with the hook handle 10; when sunshade is needed, the hook handle 10 is pulled forward to pull the sunshade 7 out of the rewinding drum box 1, and the roller blind tube 5 rotates accordingly and drives the torsion spring 6 to torsionally deform, and the torsion spring 6 pulls the sliding sleeve 14 to slide in the roller blind tube 5, and the torsion spring 6 stores elastic potential energy to complete the unfolding of the sunshade 7, and finally the hook handle 10 is hung on the hanging ring.

[0045] When sunshade is no longer needed, the user releases the hook handle 10, the torsion spring 6 recovers its deformation and releases elastic potential energy, driving the shutter tube 5 to rotate rapidly, and the shutter tube 5 wraps around the sunshade 7, so that the sunshade 7 is quickly retracted into the reel box 1; during the rewinding process, the shutter tube 5 drives the driving gear 21 to rotate through the second external spline sleeve 13, and the driving gear 21 is engaged with the large gear 24 for transmission, realizing a 3-fold stroke deceleration, that is, for every 3 rotations of the shutter tube 5, the large gear 24 only rotates 1 circle, forming a first-stage deceleration effect, the large gear 24 rotates coaxially with the small gear 25, and the small gear 25 is engaged with the driven gear 22 for transmission, further realizing a 4-fold stroke deceleration, that is, for every 4 rotations of the small gear 25, the driven gear 22 only rotates 1 circle, forming a second-stage deceleration.

[0046] Through this two-stage deceleration mechanism, the original rapid rewinding movement is effectively converted into a total of 12 times the stroke deceleration process, which significantly reduces the rewinding speed of the end of the roller shutter tube 5; at the same time, the driven gear 22 compresses the mainspring 26 during the deceleration transmission process, and the mainspring 26 slowly tightens and stores energy, generating a large reverse torque when the sunshade 7 is almost fully retracted, forming an effective buffering and damping effect; this structure not only avoids the phenomenon that the strip 9 at the end of the sunshade 7 violently hits the rewinding drum box 1, reduces structural fatigue loss, but also significantly reduces noise, thereby improving the quietness and use comfort of the entire vehicle.

[0047] Through the above-mentioned structural design, the automatic rewinding structure of the sunshade of this embodiment has a significant progressive damping deceleration function: in the early stage of rewinding of the sunshade 7, since the rewinding torque provided by the torsion spring 6 is relatively large, and the driven gear 22 connected to the spring 26 has a transmission ratio of up to 12:1 due to the two-stage deceleration structure, that is, for every 12 rotations of the rolling curtain tube 5, the driven gear 22 only rotates 1 circle, and the winding speed of the spring 26 is relatively slow and the rewinding torque is relatively small. Therefore, in the early stage of rewinding, there is almost no obvious impact on the recovery of the sunshade 7, so that the sunshade 7 can be rewound quickly and efficiently, greatly improving the convenience of use.

[0048] As the sunshade 7 gradually approaches the fully retracted position, the roller shutter tube 5 continues to rotate, the driving gear 21, the large gear 24, the small gear 25 and the driven gear 22 continue to transmit, the mainspring 26 begins to wind up significantly, and the reverse torque it generates rises rapidly; at this time, the damping force generated by the mainspring 26 effectively restricts the roller shutter tube 5, significantly reduces the rewinding speed, and ultimately achieves deceleration and buffering at the end of the sunshade 7.

[0049] This process has good nonlinear response characteristics, namely: low damping in the initial stage and high damping in the final stage. It not only maintains the rapid rewinding experience in the initial stage, but also avoids the risk of violent collision between the end strip 9 and the winding drum box 1 structure, significantly reduces noise, and improves structural life and ride comfort.

[0050] In order to avoid the problem that the hook handle 10 on the slat 9 protrudes and hits the user or affects the aesthetics when the sunshade 7 is not in use, the structure of the hook handle 10 can be optimized; preferably, the hook handle 10 is installed in the middle of the slat 9 in a hinged manner so that it can rotate relative to the slat 9; when the sunshade 7 is not in use, the user can pull the hook handle 10 to a position parallel to the slat 9, so that the hook handle 10 fits the surface of the slat 9 to avoid it protruding outward, effectively reducing the risk of accidental collision and improving the safety and aesthetics of the overall structure.

[0051] Specific embodiment 2 of the automatic rewinding structure of a sunshade with buffer damping provided by the present invention:

[0052] Based on the first specific implementation method, this embodiment further optimizes the structural design of the installation component 2 to improve the installation convenience and stability of the automatic retracting device of the sunshade in the car.

[0053] Specifically, such as Figure 2 As shown, the mounting assembly 2 includes an inner shell 32 and an outer shell 33, with a mounting clamping space formed therebetween, and a plurality of screws are used to connect and fix the inner shell 32 and the outer shell 33. The reel box 1 is fixedly mounted on the inner shell 32.

[0054] This embodiment is suitable for installing a sunshade structure on the inner side of a car's B-pillar. The specific installation method is as follows: first, a portion of the inner clamping shell 32 is inserted into the gap on the inner side of the car's B-pillar, and then the outer clamping shell 33 is buckled onto the inner clamping shell 32, so that the structure on the inner side of the car's B-pillar is just in the installation clamping space between the two. Then, use screws to tighten the inner clamping shell 32 and the outer clamping shell 33 to connect them, and utilize the clamping effect between the two to achieve a stable installation on the inner side of the car's B-pillar.

[0055] This embodiment achieves glue-free installation through a mechanical clamping structure, which has the advantages of easy installation and disassembly without damaging the original structure of the vehicle, further improving the adaptability of the product and user experience.

[0056] Specific embodiment 3 of the automatic rewinding structure of a sunshade with buffer damping provided by the present invention:

[0057] In view of the fact that the front windshield of a car is usually fan-shaped, this embodiment optimizes the structure of the roller shutter tube 5 for adaptability. Figure 8-10 As shown, the rolling curtain tube 5 is composed of an inner spline tube 30 and a tapered reducer 31 . The tapered reducer 31 is fixedly mounted on the outer wall of the inner spline tube 30 , and the sunshade 7 is wound around the tapered reducer 31 .

[0058] During the unfolding process of the sunshade curtain 7, since the conical reducing tube 31 gradually becomes thinner from top to bottom, its upper diameter is large and its lower diameter is small, the release speed of the sunshade curtain 7 in the upper area is faster than that in the lower area, so that the sunshade curtain 7 unfolds in a fan-shaped manner, which can better fit the shape of the front windshield and enhance the sunshade effect and aesthetics.

[0059] It should be noted that, in this document, terms such as "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements that are inherent to such process, method, article or apparatus.

[0060] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An automatic rewinding structure for a sunshade with buffer damping, comprising a rewinding drum box (1) and a mounting assembly (2), wherein the mounting assembly (2) is used to mount the rewinding drum box (1) on a car window; a first end cover (3) and a second end cover (4) are mounted on both ends of the rewinding drum box (1), respectively, and characterized in that: A curtain rolling tube (5) is provided inside the reel box (1), a shaft head (15) is fixed on the inner side of the first end cover (3), and two ends of the curtain rolling tube (5) are respectively mounted on the shaft head (15) of the first end cover (3) and the second end cover (4) in a rotatable manner. A torsion spring (6) is provided inside the curtain rolling tube (5), one end of the torsion spring (6) is fixedly connected to the end of the shaft head (15), and the other end of the torsion spring (6) is connected to the curtain rolling tube (5); The second end cover (4) is also provided with a buffer damping assembly (16), which acts on the end of the rolling curtain tube (5); a sunshade (7) is wound on the rolling curtain tube (5), and a slit hole (8) is opened in the axial direction of the reel box (1), and the end of the sunshade (7) passes outward from the slit hole (8), and the end of the sunshade (7) is connected to a strip plate (9), and a hook handle (10) is provided on the strip plate (9).

2. The automatic rewinding structure of a sunshade with buffer damping according to claim 1, characterized in that: The inner wall of the curtain rolling tube (5) is internally splined, and a first external spline sleeve (12) is mounted on the shaft head (15) of the first end cover (3), and the first external spline sleeve (12) can rotate relative to the shaft head (15). A second external spline sleeve (13) is rotatably mounted on the second end cover (4), and the two ends of the curtain rolling tube (5) are spline-connected with the first external spline sleeve (12) and the second external spline sleeve (13) respectively; a sliding sleeve (14) is provided in the curtain rolling tube (5) and is matched with its spline, and the sliding sleeve (14) has external splines, and the end of the torsion spring (6) is connected to the sliding sleeve (14).

3. The automatic rewinding structure of a sunshade with buffer damping according to claim 2, characterized in that: The buffer damping assembly (16) includes an assembly cover (17) and a reduction gear set (18); the assembly cover (17) is used to assemble the reduction gear set (18) on the outside of the second end cover (4) by means of a plurality of bolts; a first fixed shaft (19) and a second fixed shaft (20) are fixed to the outer side surface of the second end cover (4); The reduction gear set (18) includes a driving gear (21), a driven gear (22) and a duplex gear (23), wherein the driving gear (21) is connected to the hub of the second external spline sleeve (13), the duplex gear (23) is rotatably mounted on the first fixed shaft (19), the duplex gear (23) is composed of a large gear (24) and a small gear (25), and the driven gear (22) is rotatably mounted on the second fixed shaft (20); wherein the driving gear (21) is meshed with the large gear (24), the small gear (25) is meshed with the driven gear (22), and the radius of the driving gear (21) is smaller than the radius of the large gear (24), and the radius of the small gear (25) is smaller than the radius of the driven gear (22); A spring (26) is installed inside the assembly cover (17), and the spring (26) acts on the driven gear (22).

4. The automatic rewinding structure of a sunshade with buffer damping according to claim 3, characterized in that: The second end cover (4) is provided with an assembly circular hole (27); a spline short tube (28) is fixed to the end surface of the second external spline sleeve (13); the spline short tube (28) is installed in the assembly circular hole (27) and is rotatable; a spline shaft (29) is fixed to the end of the driving gear (21); the spline shaft (29) is spline-matched with the spline short tube (28).

5. The automatic rewinding structure of a sunshade with buffer damping according to claim 4, characterized in that: The gear ratio between the driving gear (21) and the large gear (24) is 1:3, and the gear ratio between the small gear (25) and the driven gear (22) is 1:

4.

6. The automatic rewinding structure of a sunshade with buffer damping according to any one of claims 1 to 5, characterized in that: The curtain rolling tube (5) is composed of an inner spline tube (30) and a tapered reducer (31), and the tapered reducer (31) is sleeved and fixed on the outer wall of the inner spline tube (30).

7. The automatic rewinding structure of a sunshade with buffer damping according to claim 1, characterized in that: The hook handle (10) is hingedly mounted on the middle portion of the strip board (9).

8. The automatic rewinding structure of a sunshade with buffer damping according to claim 1, characterized in that: The mounting assembly (2) comprises an inner shell (32) and an outer shell (33), wherein an installation clamping space is formed between the inner shell (32) and the outer shell (33), and a plurality of screws are connected between the inner shell (32) and the outer shell (33); the reel box (1) is fixedly mounted on the inner shell (32).

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