A secondary drive box for a double-track system and an electric curtain.

Abstract

This utility model relates to the field of electric curtain technology, and discloses a secondary transmission box for a double-layer track and an electric curtain. The key technical point is that it includes an outer shell and an inner shell placed inside the outer shell. The inner shell includes an arc-shaped body and a partition. The arc-shaped body and the partition are integrally formed to form an upper cavity and a lower cavity inside the inner shell. The arc-shaped body and the partition are integrated, and the arc-shaped body is separated from the outer shell. After the arc-shaped body is installed inside the outer shell, the position of the partition is limited and the position of the partition will not shift, preventing excessive contact force between the partition and the first pulley or the second pulley, and ensuring the rotational stability of the first pulley and the second pulley.

Description

Technical Field

[0001] This utility model relates to the field of electric curtain technology, and more specifically to a secondary transmission box with a double-layer track and an electric curtain. Background Technology

[0002] In the technical solution for separately controlling the left and right curtains of electric curtains, the transmission box is set up in the form of upper and lower double tracks, with the left and right curtains each occupying one track cavity, and controlled by two motors, thereby realizing separate and / or simultaneous control of the left and right curtains. For example, Chinese public document CN222486977U discloses a double track device for opening and closing curtains and the opening and closing curtain. In the auxiliary transmission box assembly, the partition frame and the auxiliary box body are set separately. If the gap between the partition frame and the gear shaft is large, the partition frame may tilt slightly, which may result in excessive resistance between the partition frame and the upper or lower pulley, leading to greater friction during the rotation of the upper or lower pulley. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a secondary transmission box and electric curtain with double-layer track, so as to increase the stability of the partition and prevent excessive resistance between it and the first pulley and the second pulley.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a secondary transmission box with a double-layer track, comprising an outer shell and an inner shell placed inside the outer shell, the inner shell comprising an arc-shaped body and a partition, the arc-shaped body and the partition being integrally formed to form an upper cavity and a lower cavity inside the inner shell, and a cylinder integrally formed inside the outer shell, the cylinder being vertically arranged and passing through the partition.

[0005] As a further improvement of this utility model, the outer shell includes a housing and a cover plate, and the housing and the cover plate are detachably connected.

[0006] As a further improvement of this utility model, a positioning hole is provided on the cylinder, and a column is integrally formed inside the cover plate, with part of the column extending into the positioning hole.

[0007] As a further improvement of this utility model, a fixing post is integrally formed in the positioning hole, a threaded hole is provided on the fixing post, and a countersunk hole corresponding to the threaded hole is provided on the post body.

[0008] As a further improvement of this utility model, a circular groove is provided at one end of the column facing the fixed column, and part of the column extends into the circular groove.

[0009] As a further improvement of this utility model, a reinforcing rib is provided between the fixed column and the cylinder.

[0010] As a further improvement of this utility model, a notch is provided on the cover plate.

[0011] As a further improvement of this utility model, a protrusion is integrally formed inside the outer shell, the inner shell abuts against the protrusion, a locking block is formed on the protrusion, and a locking groove adapted to the locking block is provided on the inner shell.

[0012] As a further improvement of this utility model, a circular ring is integrally formed on the bottom wall of the outer shell.

[0013] An electric curtain includes a secondary drive box for a double-track system as described above.

[0014] The beneficial effects of this utility model are as follows: In this utility model, the arc-shaped body and the partition are integrated, and the arc-shaped body is separated from the outer shell. After the arc-shaped body is installed inside the outer shell, the position of the partition is limited and the position of the partition will not shift, preventing the partition from having excessive contact force with the first pulley or the second pulley, and ensuring the rotational stability of the first pulley and the second pulley. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a cross-sectional view of the present invention; Figure 3 This is a schematic diagram of the cover plate in this utility model; Figure 4 This is a schematic diagram of the inner shell structure in this utility model; Figure 5 This is a schematic diagram of the shell structure in this utility model.

[0016] Reference numerals: 1. Outer shell; 11. Cylinder; 111. Positioning hole; 12. Shell; 13. Cover plate; 131. Column; 132. Countersunk hole; 133. Circular groove; 134. Notch; 14. Protrusion; 141. Locking block; 15. Ring; 2. Inner shell; 21. Arc-shaped body; 22. Partition; 23. Upper cavity; 24. Lower cavity; 25. Locking groove; 3. Fixing post; 31. Reinforcing rib. Detailed Implementation

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Identical components are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to directions in the accompanying drawings, and the terms "bottom surface," "top surface," "inner," and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0018] Reference Figures 1 to 5As shown, a secondary transmission box for a double-layer track in this embodiment includes an outer shell 1 and an inner shell 2 placed inside the outer shell 1. The inner shell 2 includes an arc-shaped body 21 and a partition 22. The arc-shaped body 21 and the partition 22 are integrally formed. The partition 22 is used as part of the inner shell 2 so that the relative position between the partition 22 and the arc-shaped body 21 does not change, so that an upper cavity 23 and a lower cavity 24 are formed inside the inner shell 2. A first pulley is rotatably connected inside the upper cavity 23, and a second pulley is rotatably connected inside the lower cavity 24. The first pulley and the second pulley are respectively connected to transmission belts. The two transmission belts are driven by motors to move. The left curtain and the right curtain are respectively connected to the two transmission belts, so that the motor can control the movement of the left curtain and the right curtain individually or simultaneously. Two sets of belt hole groups are provided on the outer shell 1. Each set of belt hole groups includes two belt holes. One set of belt hole groups is connected to the upper cavity 23, and the other set of belt hole groups is connected to the lower cavity 24. Both are for passing the transmission belt. The outer casing 1 has an integrally formed cylinder 11, which is vertically arranged and passes through the partition 22. The first pulley and the second pulley are rotatably connected to the cylinder 11, and bearings can be installed between the first pulley, the second pulley and the cylinder 11. The arc-shaped body 21 and the partition 22 are integrated. The arc-shaped body 21 is separated from the outer shell 1. After the arc-shaped body 21 is installed inside the outer shell 1, the position of the partition 22 is limited and the position of the partition 22 will not shift, preventing the partition 22 from having excessive contact force with the first pulley or the second pulley, and ensuring the rotational stability of the first pulley and the second pulley.

[0019] Reference Figure 1 As shown, the outer casing 1 includes a housing 12 and a cover plate 13. The housing 12 and the cover plate 13 are detachably connected. The first pulley, the second pulley and the inner casing 2 can be installed by removing and installing the cover plate 13. The housing 12 and the outer shell 1 can be connected by a snap-fit ​​mechanism.

[0020] Reference Figure 2 As shown, a positioning hole 111 is provided on the cylinder 11, and a column 131 is integrally formed inside the cover plate 13. Part of the column 131 extends into the positioning hole 111. Through the cooperation of the positioning hole 111 and the column 131, the cover plate 13 is limited, which facilitates the installation of the cover plate 13.

[0021] Reference Figure 2As shown, preferably, the housing 12 and the outer shell 1 are connected by bolts. A fixing post 3 is integrally formed in the positioning hole 111. The fixing post 3 has a threaded hole. The post 131 has a countersunk hole 132 corresponding to the threaded hole. After the bolt passes through the countersunk hole 132, it is threadedly connected to the threaded hole, so that the cover plate 13 and the outer shell 1 are fixed. The bolt connection makes the fixation of the two more secure.

[0022] Reference Figure 3 As shown, a circular groove 133 is provided at one end of the column 131 facing the fixed column 3. Part of the column 131 extends into the circular groove 133. The circular groove 133 is used to position the column 131, which facilitates the connection between the bolt and the threaded hole.

[0023] Reference Figure 5 As shown, a reinforcing rib 31 connects the fixed column 3 and the cylinder 11. There can be two reinforcing ribs 31, located on both sides of the fixed column 3, or there can be four reinforcing ribs 31 arranged in a cross shape. The addition of reinforcing rib 31 increases the connection strength between the fixed column 3 and the cylinder 11, thereby increasing the stability of the fixed column 3.

[0024] Preferred, refer to Figure 1 As shown, the cover plate 13 has a notch 134. There are two notches 134, which are located on opposite sides of the cover plate 13. The notches 134 are connected to the inside of the outer shell 1. The tail hook can be hung through the notches 134.

[0025] Reference Figure 4 and Figure 5 As shown, a protrusion 14 is integrally formed inside the outer shell 1, and the inner shell 2 abuts against the protrusion 14. A locking block 141 is formed on the protrusion 14, and a locking groove 25 adapted to the locking block 141 is provided on the inner shell 2. A positioning is formed between the outer shell 1 and the inner shell 2, making the installation of the inner shell 2 more stable. The bottom of the inner shell 2 abuts against the bottom wall of the outer shell 1, and the locking block 141 is embedded in the locking groove 25 to form the positioning between the two. Preferably, the slot 25 is trapezoidal in shape.

[0026] Reference Figure 5 As shown, a ring 15 is integrally formed on the bottom wall of the outer casing 1. The ring 15 is used to support the second pulley located in the lower cavity 24, prevent the second pulley from directly contacting the bottom wall of the outer casing 1, reduce the contact area between the second pulley and the bottom wall of the outer casing 1, and thus reduce friction.

[0027] An electric curtain includes a secondary drive box for a double-track system as described above.

[0028] The above are merely preferred embodiments of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are within its protection scope. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within its protection scope.

Claims

1. A double-deck track auxiliary transmission case, characterized by: The device includes an outer shell (1) and an inner shell (2) placed inside the outer shell (1). The inner shell (2) includes an arc-shaped body (21) and a partition (22). The arc-shaped body (21) and the partition (22) are integrally formed to form an upper cavity (23) and a lower cavity (24) inside the inner shell (2). A cylinder (11) is integrally formed inside the outer shell (1). The cylinder (11) is vertically arranged and passes through the partition (22).

2. A double-rail auxiliary transmission case according to claim 1, characterized in that: The outer casing (1) includes a housing (12) and a cover plate (13), wherein the housing (12) and the cover plate (13) are detachably connected.

3. A double-rail auxiliary transmission box according to claim 2, characterized in that: The cylinder (11) has a positioning hole (111), and the cover plate (13) has an integrally formed column (131), part of which extends into the positioning hole (111).

4. A double-rail auxiliary transmission box according to claim 3, characterized in that: A fixing post (3) is integrally formed inside the positioning hole (111). A threaded hole is provided on the fixing post (3), and a countersunk hole (132) corresponding to the threaded hole is provided on the post body (131).

5. A double-rail auxiliary transmission box according to claim 4, characterized in that: The column (131) has a circular groove (133) at one end facing the fixed column (3), and part of the column (131) extends into the circular groove (133).

6. The auxiliary transmission box of a double-layer track according to claim 4, characterized in that: A reinforcing rib (31) connects the fixed column (3) to the cylinder (11).

7. A double-rail auxiliary transmission box according to claim 2, characterized in that: The cover plate (13) has a notch (134).

8. A double track auxiliary transmission box according to claim 1, characterized in that: The outer shell (1) has an integrally formed protrusion (14), the inner shell (2) abuts against the protrusion (14), a locking block (141) is formed on the protrusion (14), and a locking groove (25) adapted to the locking block (141) is provided on the inner shell (2).

9. The double-rail auxiliary transmission box according to claim 1, characterized in that: A ring (15) is integrally formed on the bottom wall of the outer shell (1).

10. A motorized window treatment, characterized by: The auxiliary transmission box of a double-layer track as described in any one of claims 1 to 9.

Images