Speed regulating mechanism for bead pulling wooden shutter head

Abstract

The invention discloses a speed regulating mechanism of a bead pulling wooden shutter head. The speed regulating mechanism comprises a shell (2), a chain wheel, a center connecting shaft (10), a secondary planet carrier (13), a gear shifting clutch sleeve (19) and a secondary sun gear (21). The second-stage planet carrier (13) is mounted outside the central connecting shaft (10), and more than one second-stage planet gear (20) is arranged on the outer circular surface of the second-stage planet carrier (13) in a surrounding manner; the gear-shifting clutch sleeve (19) is installed in the shell (2) in a sliding mode, crown-shaped teeth (18) are arranged on the end face of one side of the gear-shifting clutch sleeve (19), a gear-shifting inner gear ring (14) is arranged on the inner ring of the gear-shifting clutch sleeve (19), and the gear-shifting inner gear ring (14) is meshed with the outer tooth faces of the secondary planetary teeth (20). The invention provides a speed regulating mechanism for a pull bead wooden shutter head, which is characterized in that a user can flexibly regulate the reduction ratio by shifting a gear shifting assembly according to the actual conditions of the length, the weight and the like of a wooden shutter, so that a more labor-saving operation mode is obtained, and the use flexibility and convenience are remarkably improved.

Description

Technical Field

[0001] The invention relates to the technical field of wooden blinds, and in particular to a speed regulating mechanism for a wooden blind head. Background Art

[0002] Wood blinds are a common sunshade and decorative product. Their lifting and flipping functions are usually achieved through a bead and a head mechanism. Existing wood blinds head mechanisms usually adopt a fixed reduction ratio design, that is, a fixed reduction transmission is achieved through a planetary gear system. However, this fixed reduction ratio design has the following shortcomings in actual use: The length and weight of wooden blinds vary greatly. When the wooden blinds are short and light, the fixed reduction ratio design can provide easier lifting and lowering operations; however, when the length of the wooden blinds increases and the weight increases significantly, the same reduction ratio will result in a significant increase in the operating force when pulling the bead, and the user experience will deteriorate.

[0003] For longer and heavier wooden blinds, the fixed reduction ratio design requires users to exert greater force during the lifting and lowering operations, which can easily cause user fatigue, especially during long-term use or frequent operations.

[0004] The design of fixed reduction ratio cannot dynamically adjust the lifting speed according to the weight of the wooden blinds, resulting in reduced control accuracy during the lifting of heavier wooden blinds, and prone to uneven lifting or jamming.

[0005] During the lifting and lowering process of heavier wooden blinds, the fixed reduction ratio design will cause the head mechanism to bear a larger load, accelerate the wear of mechanical parts such as gears and bearings, and shorten their service life. Summary of the invention

[0006] In order to solve the above problems, the present invention provides a speed regulating mechanism for a beaded wooden blind head, which effectively solves the deficiencies in the prior art through a speed regulating mechanism with an adjustable reduction ratio.

[0007] The present invention is realized by the following technical scheme: a speed regulating mechanism for a beaded wood blinds head, comprising: Housing, sprocket, central connecting shaft, secondary planetary gear carrier, shift clutch sleeve and secondary sun gear; The secondary planetary wheel carrier is installed outside the central connecting shaft, and one or more secondary planetary gears are arranged around its outer circumferential surface; The shift clutch sleeve is slidably mounted in the housing, and a crown-shaped tooth is provided on one end surface of the sleeve, and a shift inner gear ring is provided on the inner ring, and the shift inner gear ring is meshed with the outer tooth surface of each secondary planetary gear; The secondary sun gear is located on one side of the shift clutch sleeve, and the shift clutch sleeve is driven to move axially by the shift assembly to achieve engagement or separation with the secondary sun gear; Among them, when the crown teeth of the shift clutch sleeve cooperate with the limiting tooth grooves on the housing, the shift clutch sleeve is fixed circumferentially, and the secondary planetary wheel carrier drives the secondary planetary gears to rotate along the shift inner gear ring to achieve deceleration; when the shift clutch sleeve is separated from the limiting tooth grooves and meshes with the secondary sun gear, the shift clutch sleeve and the secondary sun gear are linked in the circumferential direction to achieve non-deceleration transmission.

[0008] As a preferred technical solution, the shift assembly includes a shift button, a toggle torsion spring and a support shaft; The shift button is provided with the toggle spring at the inner end, the shift clutch sleeve is provided with a toggle groove on the outer circumference, the toggle end of the toggle spring is buckled into the toggle groove, and the shift clutch sleeve is driven to move axially through the shift button.

[0009] As a preferred technical solution, a support shaft is provided on each side of the torsion spring, and the torsion spring is supported and installed in the housing through the support shaft.

[0010] As a preferred technical solution, a limiting tooth groove is provided inside the shell on one side corresponding to the crown tooth. When the crown tooth extends into the limiting tooth groove, the shift clutch sleeve cannot rotate in a circle. At this time, the secondary planetary wheel carrier rotates along the circumference of the shift inner gear ring.

[0011] As a preferred technical solution, the outer ring gear of the secondary sun gear has the same outer diameter as the outer ring gear formed by each secondary planetary gear.

[0012] As a preferred technical solution, one end of the secondary sun tooth forms an outer tooth segment, and the outer tooth segment meshes with the inner tooth surface of each secondary planetary gear.

[0013] As a preferred technical solution, a first support bearing and a second support bearing are also installed in the housing, which are used to support the main shaft output shaft and the sprocket respectively.

[0014] As a preferred technical solution, the axial movement stroke of the shift clutch sleeve is controlled by a limiting structure in the housing to ensure the cooperation between the crown teeth and the limiting tooth grooves.

[0015] As a preferred technical solution, it also includes a primary planetary wheel carrier, on which more than one primary planetary gear is circumferentially arranged, each primary planetary gear is meshed with a primary sun gear, the primary sun gear is linked to the sprocket, and a pull bead is installed on the outside of the sprocket.

[0016] As a preferred technical solution, a delay wheel is installed between the primary planetary wheel carrier and the secondary sun gear, one end of the delay wheel is linked with the secondary sun gear in the circumferential direction, and the other end is meshed with the primary planetary wheel carrier gear; It also includes a tail cover, which is fixedly assembled with the shell, and an inner wall surface of the outer cover is provided with an internal meshing gear ring corresponding to each first-level sun gear, and each first-level sun gear is meshed with the internal meshing gear ring for transmission. When the first-level sun gear rotates, it drives the first-level planetary gear and the first-level planetary wheel carrier to rotate along the circumference of the internal meshing gear ring, and drives the delay wheel meshed with it to rotate.

[0017] The beneficial effect of the present invention is that the present invention provides a speed regulating mechanism for a beaded wooden blind head, the core of which is that the user can flexibly adjust the reduction ratio by turning the shift assembly according to the actual conditions such as the length and weight of the wooden blind, thereby obtaining a more labor-saving operation method, which significantly improves the flexibility and convenience of use.

[0018] Specifically, when the wooden blinds are short and light, users can choose a higher reduction ratio to achieve fast lifting and lowering operations and improve efficiency; when the wooden blinds are long and heavy, users can adjust the reduction ratio to reduce operating force, avoid fatigue caused by laborious operation, and make lifting and lowering operations easier and more labor-saving. This adjustable reduction ratio design not only solves the problem of uneven operating force of traditional fixed reduction ratio mechanisms when dealing with wooden blinds of different lengths and weights, but also significantly improves the user's operating experience.

[0019] In addition, the present invention has a simple and reliable structure, is easy to operate, can adapt to a variety of usage scenarios, greatly expands the scope of application of the product, and has broad market prospects and practical value. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the internal structure of the present invention; Figure 3 It is a schematic structural diagram of the housing of the present invention; Figure 4 is a cross-sectional view of the present invention; Figure 5 It is an internal partial exploded view of the present invention; Figure 6 It is a structural schematic diagram of the shift clutch sleeve of the present invention; Description of reference numerals: 2. Housing; 30. Sprocket; 10. Central connecting shaft; 13. Secondary planetary gear carrier; 19. Shift clutch sleeve; 21. Secondary sun gear; 20. Secondary planetary gear; 18. Crown gear; 14. Shift inner gear ring; 201. Limiting tooth groove; 1. Shift button; 16. Toggle torsion spring; 15. Support shaft; 17. Toggle groove; 4. First support bearing; 29. ​​Second support bearing; 3. Main shaft output shaft; 31. Primary planetary gear carrier; 28. Primary planetary gear; 40. Primary sun gear; 400. Delay wheel; 300. Tail cover; 500. Inner meshing gear ring; 211. External gear segment. DETAILED DESCRIPTION

[0022] All features disclosed in this specification, or steps in all methods or processes disclosed, except mutually exclusive features and / or steps, can be combined in any manner.

[0023] Any feature disclosed in this specification (including any additional claims, abstract and drawings), unless otherwise stated, may be replaced by other equivalent or alternative features with similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

[0024] like Figure 1-Figure 6 As shown, the speed regulating mechanism of the pull-bead wooden blinds head of the present invention includes a housing 2, a sprocket 30, a central connecting shaft 10, a secondary planetary wheel carrier 13, a shift clutch sleeve 19 and a secondary sun gear 21. The secondary planetary wheel carrier 13 is installed on the outside of the central connecting shaft 10, and a plurality of secondary planetary gears 20 are arranged around its outer circumferential surface. The shift clutch sleeve 19 is slidably installed inside the housing 2, and a crown tooth 18 is provided on one end face thereof, and a shift inner gear ring 14 is provided in the internal annular structure, and the shift inner gear ring 14 is meshed with the outer tooth surface of each secondary planetary gear 20. The secondary sun gear 21 is located on one side of the shift clutch sleeve 19, and the shift clutch sleeve 19 is driven axially to move by the shift assembly to achieve meshing or separation with the secondary sun gear 21.

[0025] When the crown teeth 18 of the shift clutch sleeve 19 are matched with the limiting tooth grooves 201 inside the housing 2, the shift clutch sleeve 19 is fixed in the circumferential direction, and the secondary planetary gear carrier 13 drives the secondary planetary gears 20 to rotate along the shift inner gear ring 14, forming a reduction ratio of 1:16. At this time, the transmission cooperation between the primary planetary gear carrier 31 and the secondary planetary gear carrier 13 makes the power go through two stages of reduction, and the final output speed is reduced, making the lifting and lowering of the blinds more labor-saving, which is suitable for the operation of heavier or larger blinds.

[0026] When the shift clutch sleeve 19 is separated from the limit tooth groove 201 and meshed with the secondary sun gear 21, the shift clutch sleeve 19 and the secondary sun gear 21 rotate synchronously in the circumferential direction, and the secondary planetary wheel carrier 13 stops the deceleration effect, forming a transmission ratio of 1:4. In this mode, the blinds can be raised and lowered at a faster speed, which is suitable for lighter or shorter blinds and improves operating efficiency.

[0027] The shift assembly consists of a shift button 1, a toggle spring 16 and a support shaft 15. The inner end of the shift button 1 is provided with a toggle spring 16, and the outer circumferential surface of the shift clutch sleeve 19 is provided with a toggle groove 17. The toggle end of the toggle spring 16 is buckled into the toggle groove 17. By pressing the shift button 1, the user can drive the shift clutch sleeve 19 to move in the axial direction to achieve switching between different reduction ratios. Support shafts 15 are respectively provided on both sides of the toggle spring 16 to make the shift process more stable and reliable, and avoid shift failure caused by misoperation.

[0028] Inside the housing 2, a position corresponding to the crown teeth 18 of the shift clutch sleeve 19 is provided with a limit tooth groove 201. When the crown teeth 18 of the shift clutch sleeve 19 enter the limit tooth groove 201, the circumferential direction of the shift clutch sleeve 19 is locked, and the secondary planetary wheel carrier 13 rotates along the shift inner gear ring 14, so that the lifting or lowering speed of the blinds is reduced. At this time, the transmission ratio of 1:16 takes effect, and the secondary planetary gears 20 drive the primary planetary wheel carrier 31 to achieve further deceleration, ensuring that users can save more effort when operating heavier blinds.

[0029] When the user needs to increase the lifting speed of the blinds, the user can press the shift button 1 to disengage the shift clutch sleeve 19 from the limit tooth groove 201 and mesh with the secondary sun gear 21. At this time, the deceleration function of the secondary planetary gear 20 is cancelled, and the transmission ratio of 1:4 takes effect, so that the primary planetary wheel carrier 31 directly transmits to the secondary sun gear 21, thereby improving the lifting efficiency of the blinds.

[0030] The outer gear ring of the secondary sun gear 21 has the same outer diameter as the outer gear ring formed by each secondary planetary gear 20 to ensure the stability of meshing and the smoothness of transmission. In addition, an outer gear segment 211 is provided at one end of the secondary sun gear 21, and the outer gear segment 211 meshes with the inner tooth surface of each secondary planetary gear 20, thereby further enhancing the stability of power transmission.

[0031] The first support shaft 15 and the second support shaft 15 are installed inside the housing 2, which are used to support the main shaft output shaft 3 and the sprocket 30 respectively, to ensure the stable operation of the entire transmission system. The axial movement stroke of the shift clutch sleeve 19 is controlled by the limiting structure inside the housing 2 to ensure that the crown tooth 18 can correctly mesh with the limiting tooth groove 201 or the secondary sun tooth 21 when shifting.

[0032] The primary planetary wheel carrier 31 is mounted on the central connecting shaft 10, and a plurality of primary planetary gears 28 are arranged around its outer circumference. Each primary planetary gear 28 meshes with a primary sun gear 40, and the primary sun gear 40 is linked with the sprocket 30, so that the pull ball can be driven through the planetary gear set during the operation. In addition, a pull ball is installed on the outside of the sprocket 30, which is convenient for the user to pull and control the raising and lowering of the blinds.

[0033] A delay wheel 400 is also installed between the primary planetary wheel carrier 31 and the secondary sun gear 21. One end of the delay wheel 400 is linked with the secondary sun gear 21 in the circumferential direction, and the other end is meshed with the gear of the primary planetary wheel carrier 31. When the sprocket 30 is pulled, the primary sun gear 40 drives the primary planetary gear 28 to rotate along the inner meshing gear ring 500, and drives the delay wheel 400 to move accordingly to ensure the stability and reliability of the transmission.

[0034] The mechanism also includes a tail cover 300, which is fixedly assembled with the housing 2. An inner meshing gear ring 500 is provided on the inner wall surface of the tail cover 300, and each primary sun gear 40 is meshed with the inner meshing gear ring 500. When the primary sun gear 40 rotates, the primary planetary gear 28 and the primary planetary wheel carrier 31 perform circumferential meshing transmission along the inner meshing gear ring 500, and at the same time drive the delay wheel 400 meshed therewith, so that the power transmission of the entire mechanism is more uniform.

[0035] In actual use, users can adjust the reduction ratio by toggling the shift assembly according to the length and weight of the blinds. When the blinds are short and light, a higher reduction ratio can be selected to enable them to be raised and lowered quickly, improving their efficiency. When the blinds are long and heavy, a lower reduction ratio can be selected to reduce the force required for operation, making the lifting process easier and avoiding fatigue caused by long-term operation. This adjustable reduction ratio design effectively solves the problem of uneven operating force of traditional fixed reduction ratio mechanisms when facing blinds of different sizes and weights, greatly improving the user's operating experience.

[0036] In addition, the speed regulating mechanism of the present invention has a simple and reliable structure, is easy to install and maintain, can adapt to a variety of blinds of different sizes and materials, and has strong practicality and market promotion value. The combination structure of the multi-stage planetary gear train, the shift clutch sleeve 19 and the one-way clutch sleeve makes the adjustment of the reduction ratio more accurate, while ensuring the stability of the entire clutch mechanism. Through reasonable component matching, the user can freely adjust the transmission mode during use, realizing a more flexible and efficient blind control method.

[0037] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that are not conceived through creative work should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope defined in the claims.

Claims

1. A speed regulating mechanism for a wooden blind head, characterized in that: include: A housing (2), a sprocket, a central connecting shaft (10), a secondary planetary wheel carrier (13), a shift clutch sleeve (19) and a secondary sun gear (21); The secondary planetary wheel carrier (13) is mounted outside the central connecting shaft (10), and has an outer circumferential surface surrounded by at least one secondary planetary gear (20); The shift clutch sleeve (19) is slidably mounted in the housing (2), one end surface of which is provided with a crown tooth (18), and the inner ring is provided with a shift inner gear ring (14), the shift inner gear ring (14) meshing with the outer tooth surface of each secondary planetary gear (20); The secondary sun gear (21) is located on one side of the shift clutch sleeve (19), and the shift clutch sleeve (19) is driven axially by the shift assembly to achieve engagement or disengagement with the secondary sun gear (21); When the crown teeth (18) of the shift clutch sleeve (19) cooperate with the limiting tooth grooves (201) on the housing (2), the shift clutch sleeve (19) is circumferentially fixed, and the secondary planetary wheel carrier (13) drives the secondary planetary gears (20) to rotate along the shift inner gear ring (14), thereby achieving deceleration; when the shift clutch sleeve (19) is separated from the limiting tooth grooves (201) and meshes with the secondary sun gear (21), the shift clutch sleeve (19) and the secondary sun gear (21) are linked in the circumferential direction, thereby achieving non-deceleration transmission.

2. The speed regulating mechanism of the pull-bead wood blinds head according to claim 1 is characterized in that: The shift assembly comprises a shift button (1), a toggle torsion spring (16) and a support shaft (15); The shift button (1) is provided with a toggle spring (16) at the inner end thereof, and the shift clutch sleeve (19) is provided with a toggle groove (17) on the outer circumferential surface thereof; the toggle end of the toggle spring (16) is buckled into the toggle groove (17), and the shift clutch sleeve (19) is driven to move axially through the shift button (1).

3. The speed regulating mechanism of the pull-bead wood blinds head according to claim 2 is characterized in that: A support shaft (15) is provided on each side of the torsion spring (16), and the torsion spring (16) is supported and installed in the housing (2) via the support shaft (15).

4. The speed regulating mechanism of the pull-bead wood blinds head according to claim 1 is characterized in that: A limiting tooth groove (201) is provided inside the housing (2) on one side corresponding to the crown tooth (18); when the crown tooth (18) extends into the limiting tooth groove (201), the shift clutch sleeve (19) cannot rotate in a circle, and at this time, the secondary planetary wheel carrier rotates along the circumference of the shift inner gear ring.

5. The speed regulating mechanism of the pull-bead wood blinds head according to claim 1 is characterized in that: The outer gear ring of the secondary sun gear (21) has the same outer diameter as the outer gear ring formed by each of the secondary planetary gears (20).

6. The speed regulating mechanism of the pull-bead wood blinds head according to claim 1, characterized in that: One end of the secondary sun tooth (21) forms an external tooth segment (211), and the external tooth segment (211) meshes with the internal tooth surface of each secondary planetary tooth (20).

7. The speed regulating mechanism of the pull-bead wood blinds head according to claim 1, characterized in that: A first support bearing (4) and a second support bearing (29) are also installed in the housing (2), and are used to support the main shaft output shaft (3) and the sprocket (30) respectively.

8. The speed regulating mechanism of the pull-bead wood blinds head according to claim 1, characterized in that: The axial movement stroke of the shift clutch sleeve (19) is controlled by a limiting structure in the housing (2) to ensure the matching of the crown teeth (18) with the limiting tooth grooves (201).

9. The speed regulating mechanism of the pull-bead wood blinds head according to claim 1, characterized in that: It also comprises a primary planetary wheel carrier (31), on which one or more primary planetary teeth (28) are circumferentially arranged, each primary planetary tooth (28) meshes with a primary sun tooth (40), the primary sun tooth (40) is linked to the sprocket (30), and a pull bead is installed on the outside of the sprocket (30).

10. The speed regulating mechanism for the pull-bead wood blinds head according to claim 9, characterized in that: A delay wheel (400) is installed between the primary planetary wheel carrier and the secondary sun gear, one end of the delay wheel being linked with the secondary sun gear (21) in the circumferential direction, and the other end of the delay wheel being meshed with the gear of the primary planetary wheel carrier (31); It also includes a tail cover (300), which is fixedly assembled with the shell, and an inner meshing gear ring (500) is provided on the inner wall surface of the outer cover corresponding to each first-level sun tooth, and each first-level sun tooth meshes with the inner meshing gear ring for transmission. When the first-level sun tooth rotates, it drives the first-level planetary gear and the first-level planetary wheel carrier to mesh and rotate along the circumference of the inner meshing gear ring, and drives the delay wheel meshed with it to rotate.

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