Automatic clutch mechanism of bead pulling wooden shutter head

Abstract

The utility model discloses an automatic clutch mechanism of a bead pulling wood shutter head, which comprises a shutter head main body, the shutter head main body comprises a page turning mechanism, a speed change mechanism and a clutch mechanism, the clutch mechanism comprises a ratchet wheel seat, one end of the ratchet wheel seat is connected with the speed change mechanism, and the other end of the ratchet wheel seat is connected with the speed change mechanism. More than one pawl is rotationally arranged on the outer circle surface of the other end of the rotating shaft; and the ratchet wheel sleeve is installed outside the ratchet wheel seat, the ratchet wheel seat is provided with a pawl groove corresponding to each pawl, and the pawls are arranged in the pawl grooves. According to the automatic clutch mechanism, by optimizing the matching relation of the ratchet wheel, the pawl, the one-way clutch sleeve and the eccentric wheel, the technical problems that an existing blind window brake head is unstable in clutch switching, low in meshing precision, large in friction loss, short in transmission service life and the like are solved, and the innovative effects of smooth operation, stable clutch, high precision, high durability and convenient and fast assembly are achieved; and the use experience and the product competitiveness of the shutter are obviously improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of pull bead wooden shutter head, more specifically to a kind of automatic clutching mechanism of pull bead wooden shutter head. BACKGROUND

[0002] Shutter is widely used in indoor decoration, sunshade and privacy protection field, especially in modern home, office and high-end hotel environment, its aesthetic and practicality are favored by user. The traditional pull bead type shutter usually adopts the way of manually pulling pull bead to realize the lifting and angle adjustment of blade, and the shutter head is the core component of the entire shutter adjusting system, which usually contains a page turning mechanism, a speed changing mechanism and a transmission mechanism to realize precise control of the shutter blade.

[0003] The existing pull bead type shutter has the following main technical problems:

[0004] The conventional shutter relies on user to manually pull the pull bead for lifting operation, and cannot automatically descend after releasing the pull bead, resulting in the need for continuous force during use, which is not convenient. Some products try to improve this problem by adding counterweight or auxiliary spring, but the effect is limited, and still relies on manual operation, which cannot realize the real automatic descending function.

[0005] The winding device of wooden shutter is usually not in the same straight line with the center of the head, resulting in eccentric problem of transmission system, which easily produces additional friction during lifting, increases driving force demand, and affects service life. The uneven transmission caused by eccentricity easily causes lifting jamming or asynchronization problem, affecting overall operation experience.

[0006] In the conventional structure, the assembly of transmission mechanism requires high matching precision, and the manufacturing and assembly process is complex. Insufficient assembly precision can cause unstable operation of transmission system, and easily cause problems such as jamming, noise or increased friction resistance, affecting the reliability and durability of the product. UTILITY MODEL CONTENTS

[0007] In order to solve the above problems, the utility model provides an automatic clutching mechanism of pull bead wooden shutter head, which can effectively solve the deficiencies in the prior art.

[0008] The utility model is realized through the following technical solutions: an automatic clutching mechanism of pull bead wooden shutter head, comprising a shutter head main body, the shutter head main body includes a page turning mechanism, a speed changing mechanism and a clutching mechanism, the clutching mechanism is arranged at the output end of the speed changing mechanism, the clutching mechanism output end is connected with main shaft output shaft, the main shaft output shaft is linked or disconnected with the speed changing mechanism through the clutching mechanism;The clutching mechanism comprises:

[0009] A ratchet seat, one end of which is connected with the gear shifting mechanism, and more than one pawl is arranged on the outer circular surface of the other end;

[0010] A ratchet sleeve is installed outside the ratchet seat, and a pawl slot is arranged on the ratchet seat corresponding to each pawl, the pawl is arranged in the pawl slot, and the pawl is extended out of the pawl slot or retracted into the pawl slot through the relative rotation between the ratchet sleeve and the ratchet seat.

[0011] A one-way clutch sleeve is axially assembled with the ratchet seat, the ratchet sleeve has a pawl part assembled into the one-way clutch sleeve, and the rotation of the one-way clutch sleeve is driven by the pawl extended outside the pawl slot.

[0012] It also includes a cross shaft structure, and the main shaft output shaft is connected and assembled with the ratchet seat through the cross shaft structure.

[0013] As a preferred technical solution, a protruding part is arranged around the inner wall surface of the one-way clutch sleeve, and the pawl is in contact with the protruding part after being extended into the pawl slot, and drives the rotation of the one-way clutch sleeve.

[0014] As a preferred technical solution, the cross shaft structure includes:

[0015] A first positioning assembly part is arranged on the side of the one-way clutch sleeve away from the ratchet sleeve, an eccentric wheel is positioned and installed on the side of the one-way clutch sleeve away from the ratchet sleeve, the eccentric wheel is provided with a first positioning slot corresponding to the first positioning assembly part, and the first positioning assembly part is positioned and installed in the first positioning slot.

[0016] As a preferred technical solution, a second positioning slot perpendicular to the first positioning slot is arranged on the side of the eccentric wheel away from the one-way clutch sleeve, and the main shaft output shaft is installed on the side of the eccentric wheel away from the one-way clutch sleeve.

[0017] As a preferred technical solution, the main shaft output shaft is provided with a protruding second positioning assembly part corresponding to the position of the second positioning slot, and the second positioning assembly part is positioned and arranged in the second positioning slot.

[0018] As a preferred technical solution, a support bearing is installed on the outside of the main shaft output shaft.

[0019] As a preferred technical solution, a rotating slot is arranged on the ratchet seat, a rotating part is arranged at one end of the pawl, and each pawl is arranged in the rotating slot through the rotating part.

[0020] As a preferred technical solution, the two side surfaces of the pawl slot are inclined guide surfaces, and the pawl is retracted into the pawl slot when the ratchet seat is misaligned with the ratchet sleeve.

[0021] As a preferred technical scheme, the ratchet seat and the assembly surface of the ratchet sleeve form a stroke gap cavity, and the pawl is adjusted to extend into or retract from the claw groove through the stroke gap cavity.

[0022] The utility model discloses the beneficial effect is: the utility model discloses a special clutch design is added in the inside of the head, when the user pulls the pull bead a certain angle after reverse, and the clutch structure will make the head and pull bead mechanism disengagement, thereby utilizing the gravity effect of the louver, the blade is automatically lowered, need not continuously pull the pull bead, greatly promote the use convenience, the utility model discloses a kind of louver, including support bearing, variable speed mechanism, main shaft output shaft, ratchet seat, pawl, ratchet sleeve, one-way clutch cover, first positioning assembly part, eccentric wheel, second positioning assembly part, drive shaft, it is characterized in that: the ratchet seat is connected with the pawl, and the pawl is connected with the ratchet sleeve.

[0023] And the utility model discloses cross axle structure, ensure that the head and the drive axis of winding device are on the same straight line, effectively avoid the eccentric problem caused by axis misplacement in traditional structure, the structure can balance transmission force, reduce additional friction, make the lifting operation of louver more smooth and stable, avoid the problem of jamming or imbalance caused by eccentricity, improve product service life. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, below will to the drawing needed to be used in the embodiment or prior art description simple introduction, obviously, the drawing in the following description only some embodiments of the utility model, for those skilled in the art, under the premise of not creating laboriously, according to these drawings, other drawings can also be obtained.

[0025] Figure 1 It is the overall structure schematic diagram of the utility model;

[0026] Figure 2 It is the utility model's explosion map;

[0027] Figure 3 It is the structure schematic diagram of the utility model's pawl part;

[0028] Figure 4 It is the structure schematic diagram of the utility model's one-way clutch cover;

[0029] EXPLANATION OF DRAWINGS:

[0030] 200, page turning mechanism;100, variable speed mechanism;2, main shaft output shaft;7, ratchet seat;9, pawl;6, ratchet sleeve;61, claw groove;5, one-way clutch cover;51, protruding part;8, first positioning assembly part;4, eccentric wheel;42, first positioning groove;41, second positioning groove;3, second positioning assembly part;1, support bearing;71, rotating groove;61, inclined guide surface;10, stroke gap cavity. DETAILED DESCRIPTION

[0031] All features disclosed in this specification, or all steps of any methods or processes disclosed in this specification, may be combined in any combination, except combinations where at least some of such features and / or steps are mutually exclusive.

[0032] Any feature in the present specification, unless explicitly stated to the contrary, is intended to be an example of an equivalent or similar feature. In other words, in the context of this specification, the use of the word "example" to modify a feature, or the use of language such as "for example", "for instance", "e.g." or "for example only" in relation to a feature, means only that the feature is an example of a generic type of that feature. It does not imply that the feature is the only generic type of that feature, or that the feature is the only example of that type.

[0033] As shown in Figures 1-4 The utility model provides a kind of automatic clutching mechanism of pull bead wooden louver head, including louver head main body, louver head main body includes page turning mechanism 200, speed change mechanism 100 and clutching mechanism. Clutching mechanism is arranged in the output end of speed change mechanism 100, the output end of clutching mechanism is connected main shaft output shaft 2, main shaft output shaft 2 is linked or disconnected with speed change mechanism 100 by clutching mechanism, to realize the adjustment of louver.

[0034] Clutching mechanism includes ratchet seat 7, ratchet sleeve 6 and one-way clutch sleeve 5. Ratchet seat 7 one end is connected with speed change mechanism 100, and the outer circular surface of the other end is rotatably provided with a plurality of pawls 9.

[0035] Ratchet sleeve 6 is installed outside ratchet seat 7, and pawl groove 61 is provided on ratchet seat 7 corresponding to each pawl 9, and pawl 9 is arranged in pawl groove 61, and by the relative rotation between ratchet sleeve 6 and ratchet seat 7, pawl 9 can be extended from pawl groove 61 or retracted into pawl groove 61, so as to realize the clutching function. One-way clutch sleeve 5 is axially assembled with ratchet seat 7, and part of pawl 9 of ratchet sleeve 6 is installed into one-way clutch sleeve 5, and the pawl 9 extending outside the pawl groove 61 drives the rotation of the one-way clutch sleeve 5, to realize one-way drive.

[0036] It also includes a cross shaft structure, and the main shaft output shaft is connected and assembled with the ratchet seat through the cross shaft structure.

[0037] In order to improve the stability of the clutching process, the inner wall surface of one-way clutch sleeve 5 is provided with a protruding portion 51. When the pawl 9 extends from the pawl groove 61, it contacts the protruding portion 51 and drives the rotation of the one-way clutch sleeve 5, so that the power can be reliably transmitted to the main shaft output shaft 2, ensuring that the page turning action of the louver is accurately performed. At the same time, the side of the one-way clutch sleeve 5 away from the ratchet sleeve 6 is provided with a protruding first positioning assembly part 8, and the side of the one-way clutch sleeve 5 away from the ratchet sleeve 6 is provided with an eccentric wheel 4, and the eccentric wheel 4 is provided with a first positioning groove 42 corresponding to the first positioning assembly part 8, and the first positioning assembly part 8 is positioned and installed in the first positioning groove 42, so that the eccentric wheel 4 can accurately cooperate with the action of the one-way clutch sleeve 5, ensuring the stability of the clutching process.

[0038] The one side of the eccentric wheel 4 away from the one-way clutch cover 5 is provided with a second positioning groove 41 perpendicular to the first positioning groove 42, and the one side of the eccentric wheel 4 away from the one-way clutch cover 5 is provided with the main shaft output shaft 2. The main shaft output shaft 2 is provided with a protruding second positioning assembly part 3 corresponding to the position of the second positioning groove 41, and the second positioning assembly part 3 is positioned in the second positioning groove 41, so that the main shaft output shaft 2 and the eccentric wheel 4 maintain a precise docking relationship, and the stability of power transmission is guaranteed. In addition, the outer part of the main shaft output shaft 2 is provided with a supporting bearing 1, which reduces the axial and radial friction during the operation of the main shaft, improves the durability and service life of the overall mechanism.

[0039] The ratchet seat 7 is provided with a rotating groove 71, and one end of the pawl 9 is provided with a rotating part, and each pawl 9 is rotatably arranged in the rotating groove 71 through the rotating part, so that the pawl 9 can freely swing when subjected to force, and the flexibility and reliability of the clutch action are improved. The two side surfaces of the claw groove 61 are inclined guide surfaces 61, when the ratchet seat 7 and the ratchet cover 6 are relatively dislocated, the pawl 9 can smoothly shrink into the claw groove 61, avoiding the problem that the traditional pawl 9 mechanism is stuck due to excessive return resistance, so that the clutching process is more stable and reliable.

[0040] In addition, the assembly surface of the ratchet seat 7 and the ratchet cover 6 forms a stroke gap cavity 10, through the adjustment of the stroke gap cavity 10, it is ensured that the pawl 9 can extend out or shrink into the claw groove 61, so that the mechanism can maintain reliable clutching effect under different working conditions.

[0041] In actual application, when the user applies tension, the pawl 9 extends out and engages the one-way clutch cover 5, realizes the driving of the main shaft output shaft 2, and makes the shutter smoothly turn the page. When the user releases the pull bead or pulls in the opposite direction, the pawl 9 is retracted into the claw groove 61, and the clutch mechanism is disconnected, so as to prevent the excessive page turning action caused by misoperation, make the shutter adjusting process more smooth, and avoid the jamming phenomenon. Through the precise contact between the annular protruding part 51 on the inner wall of the one-way clutch cover 5 and the pawl 9, the engagement stability of the pawl 9 is effectively enhanced, so as to ensure that the clutch mechanism will not slip in the working process due to the reduction of the friction coefficient or the aging of the components, improve the transmission efficiency and use reliability.

[0042] In addition, the utility model adopts the modular assembly mode, the cooperation precision between each component is high, the assembly is convenient, improves the production efficiency, and reduces the manufacturing cost. The overall mechanism is rationally designed, can be applied to various pull bead wooden shutter products, especially in scenes requiring high-precision control and long-life operation.

[0043] The above merely describes a specific implementation of the present application, but the protection scope of the present application is not limited thereto, any change or replacement not through creative labor should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be limited by the protection scope defined in the claims.

Claims

1. An automatic clutching mechanism for a pull bead slat head, comprising a slat head body, the slat head body comprising a page turning mechanism (200), a gear shifting mechanism (100), and a clutching mechanism, the clutching mechanism being arranged at an output end of the gear shifting mechanism (100), an output shaft (2) of a main shaft being connected to the clutching mechanism, the main shaft output shaft (2) being linked or disconnected with the gear shifting mechanism (100) through the clutching mechanism; characterized in that: The clutch mechanism comprises: A ratchet seat (7) is connected with the gear shifting mechanism (100) at one end and has more than one pawl (9) rotatably arranged on the outer surface at the other end; A ratchet sleeve (6) is mounted on the outside of the ratchet seat (7), and the ratchet seat (7) is provided with a pawl groove (61) corresponding to each pawl (9), the pawl (9) is arranged in the pawl groove (61), and the pawl (9) is extended out of or retracted into the pawl groove (61) through the relative rotation between the ratchet sleeve (6) and the ratchet seat (7). A one-way clutch sleeve (5) is axially assembled with the ratchet seat (7), and the ratchet sleeve (6) has the pawl (9) partially assembled into the one-way clutch sleeve (5), and the pawl (9) extended out of the pawl groove (61) drives the rotation of the one-way clutch sleeve (5). Further comprising a cross shaft structure, and the main shaft output shaft is connected and assembled with the ratchet seat through the cross shaft structure.

2. The automatic clutching mechanism for the head of a pull- bead wooden blind according to claim 1, characterized in that: The inner wall surface of the one-way clutch sleeve (5) is provided with a protruding portion (51), and the pawl (9) is in contact with the protruding portion (51) after being extended out of the pawl groove (61) and drives the rotation of the one-way clutch sleeve (5).

3. The automatic clutching mechanism for the head of a pull- bead wooden blind according to claim 1, characterized in that: The cross shaft structure comprises: A first positioning assembly part (8) is arranged on the side of the one-way clutch sleeve (5) away from the ratchet sleeve (6), an eccentric wheel (4) is positioned and mounted on the side of the one-way clutch sleeve (5) away from the ratchet sleeve (6), the eccentric wheel (4) is provided with a first positioning groove (42) corresponding to the first positioning assembly part (8), and the first positioning assembly part (8) is positioned and mounted in the first positioning groove (42).

4. The automatic clutching mechanism for slatted blind head according to claim 3, characterized in that: The side of the eccentric wheel (4) away from the one-way clutch sleeve (5) is provided with a second positioning groove (41) perpendicular to the first positioning groove (42), and the main shaft output shaft (2) is mounted on the side of the eccentric wheel (4) away from the one-way clutch sleeve (5).

5. The automatic clutching mechanism for slatted blind head according to claim 4, characterized in that: The main shaft output shaft (2) is provided with a protruding second positioning assembly part (3) corresponding to the position of the second positioning groove (41), and the second positioning assembly part (3) is positioned and arranged in the second positioning groove (41).

6. The automatic clutching mechanism for slatted blind head according to claim 5, characterized in that: A support bearing (1) is mounted on the outside of the main shaft output shaft (2).

7. The automatic clutching mechanism for slatted blind head according to claim 1, characterized in that: The ratchet seat (7) is provided with a rotating groove (71), and the pawl (9) is provided with a rotating part at one end, and each pawl (9) is rotatably arranged in the rotating groove (71) through the rotating part.

8. The automatic clutching mechanism for slatted blind head according to claim 7, characterized in that: The two side surfaces of the pawl groove (61) are inclined guide surfaces, and when the ratchet seat (7) is misaligned with the ratchet sleeve (6), the pawl (9) is retracted into the pawl groove (61).

9. The automatic clutching mechanism for slatted blind head according to claim 1, characterized in that: The assembly surface of the ratchet seat (7) and the ratchet sleeve (6) forms a stroke gap cavity (10), and the pawl (9) is adjusted to be extended out of or retracted into the pawl groove (61) through the stroke gap cavity (10).

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