Brake structure of motor

Abstract

The utility model relates to the technical field of motors, and discloses a brake structure of a motor, which is characterized by comprising an inner pipe connected with the motor and an output piece, the output end of the motor extends into the inner pipe, a connecting pipe is detachably connected in the inner pipe, the output end of the motor is detachably connected with a driving piece, and the driving piece extends into the connecting pipe. When the motor stops rotating, the plane on the output piece abuts against the column body, so that the column body is clamped between the plane and the inner wall of the connecting pipe, the output piece stops rotating, braking is achieved, and during braking, due to the fact that braking force provided by the column body is enough to meet the stopping function of ascending or descending of the roller shutter, the column body and the inner wall of the connecting pipe cannot slip; therefore, the braking force cannot reversely act on the driving part, the motor is protected, and slipping failure is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, and more specifically to a brake structure of a motor. Background Art

[0002] Curtains are usually driven by motors. For roller blinds, they are driven to rise or fall, and for opening and closing curtains, they are driven to open or close, thus realizing the automation of curtains. In roller blinds, tubular motors are usually used. Tubular motors use the reduction ratio of the reduction box to amplify the braking effect, thereby achieving the braking effect.

[0003] However, conventional brake structures utilize the forward and reverse rotation of a coil spring to achieve the braking function. After long-term use, the coil spring will become fatigued, resulting in a reduction in its elastic coefficient, reduced braking effect, and even slipping failure. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a brake structure for a motor, which is used to prevent the brake structure from slipping and failing.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a brake structure of a motor, comprising an inner tube connected to the motor and an output member, the output end of the motor extends into the inner tube, a connecting tube is detachably connected to the inner tube, an active member is detachably connected to the output end of the motor, the active member extends into the connecting tube, the output member extends into the active member, at least one plane is formed on the output member, at least one slot is opened on the active member, a column is placed in the slot, and the column fits between the plane and the inner wall of the connecting tube.

[0006] As a further improvement of the present invention, three planes are provided, three notches are provided, and the planes and the notches are evenly distributed circumferentially along the central axis of the output member.

[0007] As a further improvement of the present invention, at least one limiting groove is formed on the outside of the connecting tube, and at least one limiting block is formed on the inner side of the inner tube, and the limiting block is embedded in the limiting groove.

[0008] As a further improvement of the present invention, four of the limiting grooves and four of the limiting blocks are provided and are evenly distributed circumferentially along the central axis of the inner tube.

[0009] As a further improvement of the present invention, a protrusion is formed on the inner side of the active member, a movable groove is opened on the output member, the protrusion is located in the movable groove, and when the protrusion abuts against any end of the movable groove, an accommodating space for accommodating the column is formed between the groove and the plane.

[0010] As a further improvement of the present invention, the protrusion is located between two adjacent notches.

[0011] As a further improvement of the present invention, the output member includes a driven section and a shaft section, the driven section extends into the active member, and the driven section and the shaft section are integrally formed.

[0012] As a further improvement of the present invention, a stopper is fixedly connected to one end of the inner tube away from the motor, a through hole is formed on the stopper, and the output member passes through the through hole.

[0013] As a further improvement of the utility model, a positioning block is formed on the stopper, a positioning groove is opened in the inner tube, and the positioning block is embedded in the positioning groove.

[0014] As a further improvement of the utility model, a convex strip is formed on the motor, a groove is formed on the inner wall of the inner tube, and the convex strip is embedded in the groove.

[0015] Beneficial effects of the utility model: in the utility model, when the motor stops rotating, the plane of the output member will abut against the column, so that the column is clamped between the plane and the inner wall of the connecting tube, so that the output member stops rotating and brakes are realized. When braking, the braking force provided by the column is sufficient to meet the stopping function of the roller blind rising or falling, so that there is no slipping between the column and the inner wall of the connecting tube, so the braking force will not be reversely applied to the active member, thereby protecting the motor and avoiding slipping failure;

[0016] The active member drives the output member to rotate through the protrusion, thereby reducing the resistance between the column and the plane and between the column and the inner wall of the connecting tube, mainly reducing the resistance between the column and the connecting tube, which can reduce the waste of the motor's output work and make the motor's output function act more on the output member. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0018] Figure 2 It is a cross-sectional view parallel to the motor axis in the utility model;

[0019] Figure 3 This utility model Figure 2 A schematic diagram of the enlarged structure at A in the middle;

[0020] Figure 4 It is a cross-sectional view perpendicular to the motor axis in the utility model;

[0021] Figure 5It is a cross-sectional view of the state of the output member in the utility model during the rotation process;

[0022] Figure 6 It is a structural schematic diagram of the inner tube in the utility model;

[0023] Figure 7 It is a structural schematic diagram of the active part in the utility model;

[0024] Figure 8 It is a structural schematic diagram of the connecting pipe in the utility model;

[0025] Fig. 9 It is a structural schematic diagram of the output component in the utility model.

[0026] Figure numerals: 1. motor; 2. inner tube; 21. limit block; 22. positioning groove; 23. groove; 3. output member; 31. plane; 32. movable groove; 33. driven section; 34. shaft section; 4. connecting tube; 41. limit groove; 5. active member; 51. notch; 52. protrusion; 6. accommodating space; 7. stop block; 71. positioning block; 8. column. DETAILED DESCRIPTION

[0027] 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.

[0028] Reference Figures 1 to 5 As shown, a brake structure of a motor of the present embodiment comprises an inner tube 2 connected to a motor 1 and an output member 3, wherein a plurality of threaded holes are provided on the inner tube 2, which can be connected to the outer tube of the motor by means of standard parts such as screws, the output end of the motor 1 extends into the inner tube 2, one end of the inner tube 2 abuts against the end of the motor 1, a connecting tube 4 is detachably connected in the inner tube 2, an active member 5 is detachably connected to the output end of the motor 1, the active member 5 extends into the connecting tube 4, the active member 5 comprises a ring body and an extension body, the ring body and the extension body are integrally formed, the extension body extends into the connecting tube 4, the ring body is located outside the connecting tube 4, wherein a detachable connection is realized between the ring body and the output end of the motor 1, a waist-shaped hole is provided on the ring body, the output end of the motor 1 is an output shaft, two opposite vertical surfaces are formed on the output shaft, the output shaft is inserted into the waist-shaped hole, thereby forming a transmission between the motor 1 and the active member 5;

[0029] The waist-shaped hole may also be a polygonal hole, as long as it can realize the output transmission between the motor 1 and the active member 5;

[0030] The output member 3 extends into the active member 5, and at least one plane 31 is formed on the output member 3. The active member 5 is provided with at least one notch 51, and a column 8 is placed in the notch 51. The length direction of the column 8 is parallel to the axial direction of the output end of the motor 1, and the column 8 is fitted between the plane 31 and the inner wall of the connecting tube 4.

[0031] The rotation of the output member 3 drives the curtain to retract or expand. When the motor stops rotating, the active member 5 stops with the motor 1, and the output member 3 continues to rotate due to inertia. After the output member 3 rotates a certain distance, the plane 31 abuts against the column 8, so that the column 8 is clamped between the plane 31 and the inner wall of the connecting tube 4, so that the output member 3 stops rotating, and the brake is realized.

[0032] During braking, that is, when the plane 31 contacts the column 8, the braking force provided by the column 8 is sufficient to stop the roller blind from rising or falling, so that there will be no slipping between the column 8 and the inner wall of the connecting tube 4. Therefore, the braking force will not be reversed to the active component 5, thereby protecting the motor 1 and avoiding slipping failure.

[0033] The vehicle can be stopped without amplifying the braking force through a speed reducer.

[0034] When the motor starts, the active member 5 will rotate with the rotation of the motor 1, and the active member 5 will push the column 8 to move, so that the column 8 is stuck between the plane 31 and the inner wall of the connecting tube 4, thereby driving the output member 3 to rotate at the same time. At this time, there is sliding friction between the column 8 and the inner wall of the connecting tube 4, and the column 8, the output member 3 and the active member 5 are relatively stationary.

[0035] Reference Figure 4 and Figure 5 As shown, three planes 31 are provided and three slots 51 are provided. The planes 31 and the slots 51 are evenly distributed circumferentially along the central axis of the output member 3. Two or four planes 31 can also be provided. Among them, three planes 31 are provided, which can reduce the number of planes 31 provided, and make the braking of the output member 3 more stable in its circumferential direction, and can ensure that the axis of the output member 3 coincides with the output end of the motor 1.

[0036] Reference Figure 6 and Figure 8 As shown, at least one limiting groove 41 is formed on the outside of the connecting tube 4, and at least one limiting block 21 is formed on the inner side of the inner tube 2. The limiting block 21 is embedded in the limiting groove 41, and the connecting tube 4 and the inner tube 2 are connected in a detachable manner, making the disassembly and assembly between the connecting tube 4 and the inner tube 2 more convenient.

[0037] Of course, the positions of the limiting groove 41 and the limiting block 21 can be interchanged.

[0038] There are four limit grooves 41 and four limit blocks 21, and they are evenly distributed along the central axis of the inner tube 2. The number of limit grooves 41 and four limit blocks 21 can also be two, three, or even five.

[0039] The four limiting grooves 41 are provided to ensure the relative stillness between the connecting tube 4 and the inner tube 2 and to increase the connection strength between the connecting tube 4 and the inner tube 2 .

[0040] Reference Figure 7 As shown, a protrusion 52 is formed on the inner side of the active member 5, and a movable groove 32 is opened on the output member 3. The protrusion 52 is located in the movable groove 32. When the protrusion 52 abuts against any end of the movable groove 32, an accommodating space 6 for accommodating the column 8 is formed between the notch 51 and the plane 31.

[0041] When the protrusion 52 moves to one end of the moving groove 32, the protrusion 52 abuts against the end of the moving groove 32, so that the active member 5 can drive the output member 3 to move, thereby realizing power transmission between the active member 5 and the output member 3;

[0042] When the motor 1 drives the active member 5 to rotate, the active member 5 will push the column 8 to move at the same time, so that the column 8 and one end of the slot 51 are against each other. During the entire movement of the column 88, because there is a certain resistance between the column 8 and the plane 31, the output member 3 will rotate a very small distance. When the accommodating space 6 is formed, the column 8 will enter the accommodating space 6. At this time, there is no resistance between the column 8 and the plane 31 of the output member 3. The active member 5 will continue to rotate, and the column 8 will continuously switch back and forth between the accommodating space 6 and the resistance. This process takes a very short time until the protrusion 52 is against one end of the moving groove 32. At this time, the column 8 is located in the accommodating space 6. The active member 5 drives the output member 3 to rotate through the protrusion 52, thereby reducing the resistance between the column 8 and the plane 31 and between the column 8 and the inner wall of the connecting tube 4, mainly reducing the resistance between the column 8 and the connecting tube 4, which can reduce the waste of output work of the motor 1, so that the output function of the motor 1 acts more on the output member 3.

[0043] When the motor 1 stops rotating and brakes are applied, the active member 5 stops rotating under the action of the motor 1, the column 8 and the output member 3 continue to rotate under the action of inertia, the protrusion 52 is separated from the abutment at the end of the slot 51, the plane 31 abuts against the column 8, and the column 8 is pressed between the plane 31 and the inner wall of the connecting tube 4, forming a braking force, which is sufficient to overcome the inertia of the rising or falling of the roller blind. Therefore, the column 8 will not slip between the inner wall of the connecting tube 4, and the braking of the output member 3 will not affect the motor 1 through the active member 5, thereby protecting the motor 1.

[0044] The protrusion 52 is located between two adjacent notches 51 . Preferably, the protrusion 52 is located in the middle between two adjacent notches 51 , so that the distances between the protrusion 52 and the two notches 51 are equal.

[0045] Reference Fig. 9 As shown, the output member 3 includes a driven section 33 and a shaft section 34. The driven section 33 extends into the active member 5. The driven section 33 and the shaft section 34 are integrally formed to facilitate the production of the output member 3. The active member 5 drives the driven section 33 to rotate, thereby causing the shaft section 34 to rotate.

[0046] A ring segment is formed between the driven segment 33 and the shaft segment 34, and the stopper 7 positions the output member 3 through the ring segment, thereby limiting the movement of the output member 3 along the axis direction thereof;

[0047] The side of the ring segment facing away from the stopper 7 is limited by the connecting pipe 4 .

[0048] Reference Figure 1 As shown, a stopper 7 is fixedly connected to one end of the inner tube 2 away from the motor 1. A through hole is provided on the stopper 7, and the output member 3 passes through the through hole. The stopper 7 is connected to the inner tube 2 by screws to increase the stability of the stopper 7.

[0049] A positioning block 71 is formed on the stopper 7, and a positioning groove 22 is formed in the inner tube 2. The positioning block 71 is embedded in the positioning groove 22. Preferably, there are two positioning blocks 71 and two positioning grooves 22, and the two positioning blocks 71 are arranged opposite to each other to form a positioning for the screw connection between the stopper 7 and the inner tube 2, so that the hole position on the stopper 7 is aligned with the hole position on the inner tube 2, which is convenient for installation workers to perform installation.

[0050] The motor 1 is provided with a convex strip, and the inner wall of the inner tube 2 is provided with a groove 23, and the convex strip is embedded in the groove 23 to form a positioning for the inner tube 2, so that the hole positions on the inner tube 2 are determined, which is convenient for the installation of subsequent parts;

[0051] Preferably, two convex strips and two concave grooves 23 are provided; a step is formed at the end of the motor 1 to facilitate positioning and installation with the inner tube 2.

[0052] 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 brake structure of a motor, characterized in that: The invention comprises an inner tube (2) connected to a motor (1) and an output member (3), wherein the output end of the motor (1) extends into the inner tube (2), a connecting tube (4) is detachably connected to the inner tube (2), an active member (5) is detachably connected to the output end of the motor (1), the active member (5) extends into the connecting tube (4), the output member (3) extends into the active member (5), at least one plane (31) is formed on the output member (3), at least one notch (51) is formed on the active member (5), a column (8) is placed in the notch (51), and the column (8) is fitted between the plane (31) and the inner wall of the connecting tube (4).

2. The brake structure of a motor according to claim 1, characterized in that: The planes (31) are provided in three numbers, the notches (51) are provided in three numbers, and the planes (31) and the notches (51) are evenly distributed in the circumferential direction along the central axis of the output member (3).

3. The brake structure of a motor according to claim 1, characterized in that: At least one limiting groove (41) is formed on the outside of the connecting tube (4), and at least one limiting block (21) is formed on the inside of the inner tube (2), and the limiting block (21) is embedded in the limiting groove (41).

4. The brake structure of a motor according to claim 3, characterized in that: The limiting grooves (41) and the limiting blocks (21) are each provided in four numbers and are evenly distributed in the circumferential direction along the central axis of the inner tube (2).

5. The brake structure of a motor according to claim 1, characterized in that: A protrusion (52) is formed on the inner side of the active member (5), a movable groove (32) is formed on the output member (3), the protrusion (52) is located in the movable groove (32), and when the protrusion (52) abuts against any end of the movable groove (32), an accommodating space (6) for accommodating the column (8) is formed between the notch (51) and the plane (31).

6. The brake structure of a motor according to claim 5, characterized in that: The protrusion (52) is located between two adjacent notches (51).

7. The brake structure of a motor according to claim 1, characterized in that: The output member (3) comprises a driven section (33) and a shaft section (34); the driven section (33) extends into the active member (5); and the driven section (33) and the shaft section (34) are integrally formed.

8. The brake structure of a motor according to claim 1, characterized in that: A stopper (7) is fixedly connected to one end of the inner tube (2) away from the motor (1); a through hole is provided on the stopper (7), and the output member (3) passes through the through hole.

9. The brake structure of a motor according to claim 8, characterized in that: A positioning block (71) is formed on the stopper (7), a positioning groove (22) is provided in the inner tube (2), and the positioning block (71) is embedded in the positioning groove (22).

10. The brake structure of a motor according to claim 1, characterized in that: The motor (1) is formed with a convex strip, the inner wall of the inner tube (2) is provided with a concave groove (23), and the convex strip (11) is embedded in the concave groove (23).

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