Clutch mechanism

Abstract

The utility model relates to the technical field of curtains, and discloses a clutch mechanism which is characterized by comprising a transmission pipe, an inner pipe and a fixing sleeve, the inner pipe is arranged in the transmission pipe, a motor is arranged in the inner pipe, one end of the inner pipe is connected with the fixing sleeve, a containing cavity is formed in the fixing sleeve, and the clutch mechanism is arranged between the output end of the motor and the containing cavity. The clutch mechanism is arranged between the containing cavity and the output end of the motor, the length space needed by arrangement of the motor, the clutch mechanism and the fixing sleeve is saved, matching among the motor, the clutch mechanism and the fixing sleeve is closer, an integral structure is formed, and the integral mechanism can be conveniently installed in the transmission pipe.

Description

Technical Field

[0001] The utility model relates to the technical field of curtains, and more specifically to a clutch mechanism. Background Art

[0002] Roller blinds mainly include electric roller blinds, bead roller blinds and spring roller blinds. Roller blinds have many advantages such as beautiful and simple appearance, strong and durable structure, etc. Roller blinds are suitable for a variety of places, such as business office buildings, hotels, restaurants, offices and homes. When the roller blind fabric is lowered, it can soften the indoor light and avoid the trouble of direct sunlight, achieving a good sunshade effect.

[0003] In an electric roller blind, a tubular motor is installed inside, which drives the transmission tube (i.e., the roller tube) to rotate, thereby achieving the lifting and lowering of the fabric. In a manual and electric combined roller blind, a clutch mechanism is installed inside the transmission tube. The clutch mechanism and the tubular motor are each a mechanism, which occupies a large space. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a clutch mechanism for reducing the space occupied by the clutch mechanism.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a clutch mechanism, comprising a transmission tube, an inner tube and a fixed sleeve, the inner tube being arranged in the transmission tube, a motor being arranged in the inner tube, one end of the inner tube being connected to the fixed sleeve, an accommodating cavity being opened on the fixed sleeve, a clutch mechanism being arranged between the output end of the motor and the accommodating cavity, the transmission tube being arranged outside the fixed sleeve and being clamped with the fixed sleeve.

[0006] As a further improvement of the present invention, the clutch mechanism is an electromagnetic clutch.

[0007] As a further improvement of the utility model, a positioning piece is detachably connected to the inner tube, the output end of the motor passes through the positioning piece, and the clutch mechanism is located between the positioning piece and the accommodating cavity.

[0008] As a further improvement of the utility model, the clutch mechanism includes a metal ring, a magnetic bead and a clutch part, the metal ring is connected to the positioning part, the output end of the motor passes through the clutch part, the clutch part includes a clutch section, the clutch section is located in the accommodating cavity, the two magnetic beads are respectively located on two opposite sides of the clutch section, and two grooves are provided on the side wall of the accommodating cavity.

[0009] As a further improvement of the present utility model, the clutch member further comprises a clamping section, the clamping section and the clutch section are integrally formed, a through hole is formed on the fixing sleeve, and the clamping section extends into the through hole.

[0010] As a further improvement of the present invention, at least one first engaging surface is provided on the outer side surface of the motor output end, at least one second engaging surface is provided in the engaging section, and the first engaging surface cooperates with the second engaging surface.

[0011] As a further improvement of the utility model, a boss is formed on the positioning member, at least one third engaging surface is formed on the boss, a positioning hole is opened on the metal ring, at least one fourth engaging surface is formed on the positioning hole, and the third engaging surface cooperates with the fourth engaging surface.

[0012] As a further improvement of the present invention, a plurality of hooks are integrally formed on one side of the fixing sleeve close to the positioning member, an annular groove is formed on the positioning member, and the hooks are engaged in the annular groove.

[0013] As a further improvement of the utility model, the output end of the motor extends out of the fixing sleeve and is connected to a retaining spring.

[0014] As a further improvement of the present utility model, at least one limiting strip is formed in the transmission tube, and at least one limiting groove is formed on the fixing sleeve, and the limiting strip is clamped in the limiting groove.

[0015] The beneficial effects of the utility model are as follows: in the utility model, the clutch mechanism is arranged between the accommodating cavity and the output end of the motor, which saves the length space required for the arrangement of the motor, the clutch mechanism and the fixed sleeve, makes the cooperation between the three closer, forms an integral structure, and also facilitates the installation of the integral mechanism in the transmission tube. When the transmission tube is driven to rotate by external force, the fixed sleeve will be driven to rotate through the transmission tube. At this time, the output end of the motor does not rotate, the magnetic bead is adsorbed on the metal ring, and does not have an interlocking relationship with the groove. The rotation of the fixed sleeve does not affect the motor, thereby realizing the function of integrating manual and electric. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0017] Figure 2 It is a schematic diagram of the internal structure of the utility model;

[0018] Figure 3 It is a cross-sectional view of the utility model;

[0019] Figure 4 This utility model Figure 3 A schematic diagram of the enlarged structure at A in the middle;

[0020] Figure 5 It is a structural schematic diagram of the connection of the fixed sleeve in the utility model;

[0021] Figure 6 It is a structural schematic diagram of the clutch mechanism in the utility model;

[0022] Figure 7 It is a structural schematic diagram of the transmission pipe in the utility model;

[0023] Figure 8 It is a structural schematic diagram of the metal ring in the utility model;

[0024] Fig. 9 It is a structural schematic diagram of the positioning member in the utility model;

[0025] Fig.10 It is a structural schematic diagram of the output end in the utility model;

[0026] Fig.11 It is a structural schematic diagram of the fixing sleeve in the utility model.

[0027] Figure numerals: 1. transmission tube; 11. limit strip; 2. inner tube; 21. positioning piece; 22. boss; 221. third engaging surface; 23. annular groove; 3. fixing sleeve; 31. accommodating chamber; 311. groove; 32. through hole; 33. hook; 34. limit groove; 4. clutch mechanism; 41. metal ring; 411. positioning hole; 412. fourth engaging surface; 42. magnetic bead; 43. clutch piece; 431. clutch section; 432. engaging section; 433. second engaging surface; 5. first engaging surface. DETAILED DESCRIPTION

[0028] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. The same parts are represented by the same reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the accompanying drawings, and the words "bottom surface" and "top surface", "inside" and "outside" refer to directions toward or away from the geometric center of a specific component, respectively.

[0029] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a clutch mechanism of this embodiment includes a transmission tube 1, an inner tube 2 and a fixed sleeve 3, wherein the inner tube 2 is arranged in the transmission tube 1, and a motor is arranged in the inner tube 2, and the motor is specifically a tubular motor, wherein the inner tube 2 can serve as the outer shell of the motor, and the inner tube 2 can also be sleeved on the outer shell of the motor, which can increase the sound insulation effect;

[0030] One end of the inner tube 2 is connected to the fixing sleeve 3, and a accommodating cavity 31 is opened on the fixing sleeve 3. A clutch mechanism 4 is arranged between the output end of the motor and the accommodating cavity 31. The transmission tube 1 is sleeved outside the fixing sleeve 3 and is clamped with the fixing sleeve 3. The clutch mechanism 4 is arranged between the accommodating cavity 31 and the output end of the motor, which saves the length space required for the arrangement of the motor, the clutch mechanism 4 and the fixing sleeve 3, makes the cooperation between the three closer, forms an integral structure, and also facilitates the installation of this integral mechanism in the transmission tube 1.

[0031] In one embodiment, the clutch mechanism 4 is an electromagnetic clutch, wherein the electromagnetic clutch is a prior art.

[0032] Reference Figure 4 , Figure 5 As shown, a positioning member 21 is detachably connected to the inner tube 2, a fixing member is arranged inside the inner tube 2, and the fixing member and the inner tube 2 are clamped, wherein a plurality of clamping grooves are opened at the end of the inner tube 2, a plurality of protrusions are formed on the fixing member, the protrusions are uniformly distributed along the circumference of the central axis of the fixing member, the clamping grooves are uniformly distributed along the circumference of the central axis of the inner tube 2, and the protrusions are embedded in the clamping grooves, so that a positioning connection is formed between the fixing member and the inner tube 2, the output end of the motor passes through the positioning member 21, and the clutch mechanism 4 is located between the positioning member 21 and the accommodating cavity 31;

[0033] The positioning member 21 is clamped with the fixing member, and an installation groove is opened at one end of the fixing member facing the positioning member 21. There are multiple installation grooves, and multiple installation blocks are integrally formed at one end of the positioning member 21 facing the fixing member. The installation grooves are evenly distributed circumferentially along the central axis of the fixing member, and the installation blocks are evenly distributed circumferentially along the central axis of the positioning member 21. The installation blocks are embedded in the installation grooves to form a positioning connection of the positioning member 21.

[0034] The fixing member is rotationally connected to the output end of the motor and can be connected via a bearing.

[0035] Reference Figure 6 , Figure 8 , Fig.11 As shown, the clutch mechanism 4 includes a metal ring 41, a magnetic bead 42 and a clutch member 43, wherein the material of the metal ring 41 is preferably iron;

[0036] The metal ring 41 is connected to the positioning member 21, and the output end of the motor passes through the clutch member 43. The clutch member 43 includes a clutch section 431, and the clutch section 431 is located in the accommodating chamber 31. The two magnetic beads 42 are respectively located on the opposite sides of the clutch section 431. The side wall of the accommodating chamber 31 is provided with two grooves 311. The magnetic beads 42 are located in the accommodating chamber 31. When the output end of the motor rotates, the output end of the motor will drive the clutch member 43 to rotate, and the magnetic beads 42 will be driven by the clutch member 43 and under the action of centrifugal force, partially embedded in the groove 311, and the stroke is locked, so that the clutch member 43 is engaged with the fixed sleeve 3 through the magnetic beads 42, and the rotation of the clutch member 43 will drive the fixed sleeve 3 to rotate at the same time; the function of transmitting the power of the motor to the fixed sleeve 3 is realized;

[0037] When the transmission tube 1 is driven to rotate by external force, the fixed sleeve 3 is driven to rotate through the transmission tube 1. At this time, the output end of the motor does not rotate, and the magnetic bead 42 is adsorbed on the metal ring 41 and does not engage with the groove 311. The rotation of the fixed sleeve 3 does not affect the motor.

[0038] The outer diameter of the metal ring 41 is smaller than the inner diameter of the accommodating cavity 31 , so that when the motor is not rotating, the magnetic bead 42 can be adsorbed on the metal ring 41 , ensuring that the magnetic bead 42 is separated from the groove 311 ;

[0039] A torsion spring is also provided in the transmission tube 1, and the number of the torsion springs is not limited;

[0040] Thereby realizing the function of integrating manual and electric.

[0041] Reference Figure 6 , Figure 8 , Fig. 9 , Fig.10 As shown, the clutch 43 also includes a snap-fit ​​section 432, which is integrally formed with the clutch section 431. A through hole 32 is provided on the fixed sleeve 3, and the snap-fit ​​section 432 extends into the through hole 32. The through hole 32 is connected to the accommodating cavity 31, and the cross-section of the through hole 32 is circular, so that when the fixed sleeve 3 rotates under the action of an external force, no interference occurs between the fixed sleeve 3 and the snap-fit ​​section 432 of the clutch 43.

[0042] At least one first engaging surface 5 is provided on the outer side surface of the motor output end, and at least one second engaging surface 433 is provided in the engaging section 432. The first engaging surface 5 cooperates with the second engaging surface 433. Preferably, two first engaging surfaces 5 and two second engaging surfaces 433 are provided, and correspond one to one. The two first engaging surfaces 5 are arranged relative to each other to ensure the transmission strength between the motor output end and the clutch 43. When the motor output end rotates, it can drive the clutch 43 to rotate.

[0043] A boss 22 is formed on the positioning member 21, and at least one third locking surface 221 is formed on the boss 22. A positioning hole 411 is formed on the metal ring 41, and at least one fourth locking surface 412 is formed on the positioning hole 411. The third locking surface 221 cooperates with the fourth locking surface 412. Preferably, two third locking surfaces 221 and two fourth locking surfaces 412 are each provided, and the two third locking surfaces 221 are arranged opposite to each other, which can position the metal ring 41 and prevent the metal ring 41 from rotating.

[0044] Reference Fig.11 As shown, a plurality of hooks 33 are integrally formed on one side of the fixing sleeve 3 close to the positioning member 21, and an annular groove 23 is formed on the positioning member 21, and the hooks 33 are engaged in the annular groove 23. Preferably, two hooks 33 are provided, and the hooks 33 are circumferentially arranged along the central axis of the fixing sleeve 3. The arrangement of the hooks 33 can prevent the fixing sleeve 3 from detaching from the positioning member 21.

[0045] The output end of the motor extends out of the fixed sleeve 3 and is connected to a retaining spring, wherein the output end of the motor is specifically the output shaft, the end of the output shaft extends out of the fixed sleeve 3, and an annular positioning groove is opened on the end of the output end. The retaining spring is clamped in the annular positioning groove, and plays a positioning role for the fixed sleeve 3, and cooperates with the hook 33 to limit the position of the fixed sleeve 3 and prevent the fixed sleeve 3 from detaching.

[0046] Reference Figure 7 and Fig.11 As shown, at least one limit strip 11 is formed in the transmission tube 1, and at least one limit groove 34 is provided on the fixed sleeve 3. The limit strip 11 is stuck in the limit groove 34. Preferably, four limit strips 11 are provided, and the limit strips 11 extend from one end of the transmission tube 1 to the other end. The limit strips 11 are evenly distributed circumferentially along the central axis of the smoke transmission tube 1, thereby improving the transmission stability between the fixed sleeve 3 and the transmission tube 1.

[0047] The above are only preferred implementations of the utility model. The protection scope of the utility model is not limited to the above embodiments. All technical solutions under the idea of ​​the utility model belong to the protection scope of the utility model. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the utility model should also be regarded as the protection scope of the utility model.

Claims

1. A clutch mechanism, characterized in that: The invention comprises a transmission tube (1), an inner tube (2) and a fixing sleeve (3); the inner tube (2) is arranged inside the transmission tube (1); a motor is arranged inside the inner tube (2); one end of the inner tube (2) is connected to the fixing sleeve (3); a receiving cavity (31) is provided on the fixing sleeve (3); a clutch mechanism (4) is provided between the output end of the motor and the receiving cavity (31); the transmission tube (1) is sleeved outside the fixing sleeve (3) and is clamped with the fixing sleeve (3).

2. A clutch mechanism according to claim 1, characterized in that: The clutch mechanism (4) is an electromagnetic clutch.

3. A clutch mechanism according to claim 1, characterized in that: A positioning piece (21) is detachably connected to the inner tube (2); the output end of the motor passes through the positioning piece (21); and the clutch mechanism (4) is located between the positioning piece (21) and the accommodating cavity (31).

4. A clutch mechanism according to claim 3, characterized in that: The clutch mechanism (4) comprises a metal ring (41), a magnetic bead (42) and a clutch member (43); the metal ring (41) is connected to the positioning member (21); the output end of the motor passes through the clutch member (43); the clutch member (43) comprises a clutch section (431); the clutch section (431) is located in the accommodating cavity (31); the two magnetic beads (42) are respectively located on opposite sides of the clutch section (431); and the side wall of the accommodating cavity (31) is provided with two grooves (311).

5. A clutch mechanism according to claim 4, characterized in that: The clutch member (43) further comprises a snap-fit ​​section (432), wherein the snap-fit ​​section (432) and the clutch section (431) are integrally formed, and a through hole (32) is provided on the fixing sleeve (3), and the snap-fit ​​section (432) extends into the through hole (32).

6. A clutch mechanism according to claim 5, characterized in that: At least one first engaging surface (5) is formed on the outer side surface of the motor output end, and at least one second engaging surface (433) is formed in the engaging section (432), wherein the first engaging surface (5) cooperates with the second engaging surface (433).

7. A clutch mechanism according to claim 4, characterized in that: The positioning member (21) is formed with a boss (22), and the boss (22) is formed with at least one third engaging surface (221). The metal ring (41) is provided with a positioning hole (411), and the positioning hole (411) is formed with at least one fourth engaging surface (412), and the third engaging surface (221) cooperates with the fourth engaging surface (412).

8. A clutch mechanism according to claim 4, characterized in that: A plurality of hooks (33) are integrally formed on one side of the fixing sleeve (3) close to the positioning member (21); an annular groove (23) is formed on the positioning member (21); and the hooks (33) are engaged in the annular groove (23).

9. A clutch mechanism according to any one of claims 1 to 8, characterized in that: The output end of the motor extends out of the fixing sleeve (3) and is connected to a retaining spring.

10. A clutch mechanism according to any one of claims 1 to 8, characterized in that: At least one limiting strip (11) is formed in the transmission tube (1), and at least one limiting groove (34) is formed on the fixing sleeve (3), and the limiting strip (11) is clamped in the limiting groove (34).

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