A tubular motor for a roller shutter door
By designing an adjustable-length fixed shaft structure in the roller shutter system, the problem of mismatched lengths of tubular motors was solved, simplifying the installation process and improving stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NINGBO TUOTAI INTELLIGENT TECH CO LTD
- Filing Date
- 2025-04-29
- Publication Date
- 2026-06-02
AI Technical Summary
In existing roller shutter door systems, the length of the tubular motor is difficult to match perfectly with the actual distance between the two end walls, leading to installation difficulties.
An adjustable length fixed shaft structure was designed, which allows the length of the fixed shaft to be adjusted to adapt to different installation environments through the cooperation of the threaded rod and the internal threaded tube.
It allows for adjustment of the fixed shaft length according to actual conditions, simplifying the installation process and improving installation efficiency and stability.
Smart Images

Figure CN224319173U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of tubular motor technology, and more specifically, to a tubular motor for roller shutter doors. Background Technology
[0002] In roller shutter door systems, the tubular motor serves as the drive unit, and its fixed shaft must be precisely embedded in the mounting position of the motor bracket to ensure stable motor operation and smooth opening and closing of the roller shutter door. However, in actual installation, due to the diversity of building structures, construction errors, or design adjustments, the length of the tubular motor is often difficult to perfectly match the actual distance between the two end walls. Furthermore, in existing technologies, the extension length of the fixed shaft is not adjustable, causing difficulties during installation. Therefore, we have made an improvement and proposed a tubular motor for roller shutter doors. Utility Model Content
[0003] This utility model provides a tubular motor for roller shutter doors, including a tubular motor body. One end of the tubular motor body is provided with an end cap, and a positioning plate is provided on the end cap. A rectangular tube is fixedly inserted into the middle of the positioning plate. A rectangular groove is provided inside the rectangular tube. A fixed shaft body is inserted and connected through the rectangular groove. A cavity is provided in the middle of the fixed shaft body. A threaded rod is provided in the cavity. An internally threaded tube is threadedly connected to the outer surface of the threaded rod. One end of the internally threaded tube is fixedly connected to the rectangular tube.
[0004] As a preferred technical solution of this application, the outer surface of the threaded rod is connected to the inner wall of the chamber through a damping bearing, and a cross groove is provided at the end of the threaded rod away from the tubular motor body.
[0005] As a preferred technical solution of this application, the outer surface of the internally threaded tube is inserted into the inner wall of the cavity.
[0006] As a preferred technical solution of this application, a first limiting member is provided between the end cap, the rectangular tube, and the fixed shaft body.
[0007] As a preferred technical solution of this application, the first limiting member includes two first fastening bolts that are threaded to both sides of the end cap respectively. The ends of the two first fastening bolts that are close to each other pass through the rectangular tube and abut against the side of the fixed shaft body.
[0008] As a preferred technical solution of this application, both ends of the positioning plate are provided with grooves, and a second limiting member located in the groove is threadedly connected to the positioning plate.
[0009] As a preferred technical solution of this application, the second limiting member includes a second fastening bolt threaded to the positioning plate and located in the groove, the end of the second fastening bolt passing through the rectangular tube and abutting against the side of the fixed shaft body.
[0010] As a preferred technical solution of this application, the positioning plate is provided with a through hole, and the through hole is connected to the groove.
[0011] As a preferred technical solution of this application, the positioning plate is connected to the end cover by bolts.
[0012] As a preferred technical solution of this application, a threaded groove is provided on the fixed shaft body.
[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0014] In the scheme of this application:
[0015] This application allows the fixed shaft body to move by rotating the threaded rod in conjunction with the internal threaded tube, thereby adjusting the length of the fixed shaft body located on the outer side of the rectangular tube. The adjustable length design allows installers to easily install the shaft body according to the actual situation. Attached Figure Description
[0016] Figure 1 A schematic diagram of the tubular motor for the roller shutter door provided in this application;
[0017] Figure 2 A partial structural schematic diagram of the tubular motor for the roller shutter door provided in this application;
[0018] Figure 3 A partial structural schematic diagram of the tubular motor for the roller shutter door provided in this application from another perspective;
[0019] Figure 4 A schematic diagram of the rectangular tube structure of the tubular motor for the roller shutter door provided in this application;
[0020] Figure 5 A cross-sectional view of the rectangular tube of the tubular motor for the roller shutter door provided in this application;
[0021] Figure 6 This is a schematic diagram of the internal threaded tube of the tubular motor for the roller shutter door provided in this application.
[0022] The image shows:
[0023] 1. Tubular motor body; 101. End cap; 102. Positioning plate; 103. Groove; 104. Through hole; 2. Rectangular tube; 201. Rectangular groove; 202. Fixed shaft body; 203. Chamber; 204. Threaded rod; 205. Internally threaded tube; 206. Cross groove; 207. Threaded groove; 3. First fastening bolt; 301. Second fastening bolt. Detailed Implementation
[0024] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.
[0025] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0026] For an example, please refer to... Figures 1-6 A tubular motor for a roller shutter door includes a tubular motor body 1. One end of the tubular motor body 1 is provided with an end cap 101. A positioning plate 102 is provided on the end cap 101. A rectangular tube 2 is fixedly inserted into the middle of the positioning plate 102. A rectangular groove 201 is provided inside the rectangular tube 2. A fixed shaft body 202 is inserted through the rectangular groove 201. A chamber 203 is provided in the middle of the fixed shaft body 202. A threaded rod 204 is provided inside the chamber 203. An internally threaded tube 205 is threadedly connected to the outer surface of the threaded rod 204. One end of the internally threaded tube 205 is fixedly connected to the rectangular tube 2. This application allows the fixed shaft body 202 to move by rotating the threaded rod 204 in cooperation with the internally threaded tube 205, thereby adjusting the length of the portion of the fixed shaft body 202 located outside the rectangular tube 2. This adjustable length design allows installers to easily install the motor according to the actual situation.
[0027] Furthermore, the outer surface of the threaded rod 204 is connected to the inner wall of the chamber 203 via a damping bearing, and a cross groove 206 is provided at the end of the threaded rod 204 away from the tubular motor body 1. The damping bearing enables the connection between the threaded rod 204 and the inner wall of the chamber 203, and the threaded rod 204 can rotate. The cross groove 206 facilitates the rotation of the threaded rod 204 with a screwdriver to adjust the position of the fixed shaft body 202.
[0028] Furthermore, the outer surface of the internally threaded tube 205 is inserted into the inner wall of the chamber 203.
[0029] Furthermore, a first limiting member is provided between the end cap 101, the rectangular tube 2, and the fixed shaft body 202. The first limiting member can limit the fixed shaft body 202 to improve the stability of the fixed shaft body 202.
[0030] Furthermore, the first limiting component includes two first fastening bolts 3 respectively threaded to both sides of the end cap 101. The ends of the two first fastening bolts 3 that are close to each other pass through the rectangular tube 2 and abut against the side of the fixed shaft body 202. The abutment of the fixed shaft body 202 by the first fastening bolts 3 can limit the fixed shaft body 202, thereby improving the stability of the fixed shaft body 202.
[0031] Furthermore, both ends of the positioning plate 102 are provided with grooves 103, and a second limiting member located in the groove 103 is threadedly connected to the positioning plate 102. The second limiting member can limit the fixed shaft body 202 to further improve the stability of the fixed shaft body 202.
[0032] Furthermore, the second limiting member includes a second fastening bolt 301 threadedly connected to the positioning plate 102 and located in the groove 103. The end of the second fastening bolt 301 passes through the rectangular tube 2 and abuts against the side of the fixed shaft body 202. The abutment of the fixed shaft body 202 by the second fastening bolt 301 can limit the fixed shaft body 202, thereby improving the stability of the fixed shaft body 202.
[0033] Furthermore, the positioning plate 102 has a through hole 104, which is connected to the groove 103. The positioning plate 102 can be fixed to the corresponding bracket by using a bolt through the through hole 104.
[0034] Furthermore, the positioning plate 102 is connected to the end cover 101 by bolts, which allows the positioning plate 102 and the end cover 101 to be held together without moving.
[0035] Furthermore, a threaded groove 207 is provided on the fixed shaft body 202. The threaded groove 207 is provided to limit the movement of the fixed shaft body 202 during installation in conjunction with bolts.
[0036] Loosen the second fastening bolt 301 and the first fastening bolt 3. Use a screwdriver and a Phillips head 206 to rotate the threaded rod 204. During the rotation of the threaded rod 204, it cooperates with the internal threaded tube 205 to drive the fixed shaft body 202 to move, so as to adjust the length of the fixed shaft body 202 outside the rectangular tube 2. Then tighten the second fastening bolt 301 and the first fastening bolt 3 to provide auxiliary limit for the fixed shaft body 202.
[0037] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0038] Obviously, the embodiments described above are only some embodiments of this utility model, not all embodiments. The accompanying drawings show preferred embodiments of this utility model, but do not limit the patent scope of this utility model. This utility model can be implemented in many different forms; rather, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this utility model specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this utility model.
Claims
1. A tubular motor for a roller shutter door, characterized in that, The device includes a tubular motor body (1), one end of which is provided with an end cap (101). A positioning plate (102) is provided on the end cap (101). A rectangular tube (2) is fixedly inserted into the middle of the positioning plate (102). A rectangular groove (201) is provided inside the rectangular tube (2). A fixed shaft body (202) is inserted into the rectangular groove (201). A chamber (203) is provided in the middle of the fixed shaft body (202). A threaded rod (204) is provided inside the chamber (203). An internally threaded tube (205) is threadedly connected to the outer surface of the threaded rod (204). One end of the internally threaded tube (205) is fixedly connected to the rectangular tube (2).
2. The tubular motor for roller shutter doors according to claim 1, characterized in that, The outer surface of the threaded rod (204) is connected to the inner wall of the chamber (203) through a damping bearing, and a cross groove (206) is provided at the end of the threaded rod (204) away from the tubular motor body (1).
3. The tubular motor for roller shutter doors according to claim 2, characterized in that, The outer surface of the internally threaded tube (205) is inserted into the inner wall of the chamber (203).
4. The tubular motor for roller shutter doors according to claim 3, characterized in that, A first limiting member is provided between the end cap (101), the rectangular tube (2), and the fixed shaft body (202).
5. The tubular motor for roller shutter doors according to claim 4, characterized in that, The first limiting member includes two first fastening bolts (3) that are threaded to both sides of the end cap (101). The ends of the two first fastening bolts (3) that are close to each other pass through the rectangular tube (2) and abut against the side of the fixed shaft body (202).
6. The tubular motor for roller shutter doors according to claim 5, characterized in that, The positioning plate (102) has grooves (103) at both ends, and a second limiting member located in the groove (103) is threaded onto the positioning plate (102).
7. The tubular motor for roller shutter doors according to claim 6, characterized in that, The second limiting member includes a second fastening bolt (301) threaded to the positioning plate (102) and located in the groove (103), the end of the second fastening bolt (301) passing through the rectangular tube (2) and abutting against the side of the fixed shaft body (202).
8. The tubular motor for roller shutter doors according to claim 7, characterized in that, The positioning plate (102) has a through hole (104) and the through hole (104) is connected to the groove (103).
9. The tubular motor for roller shutter doors according to claim 8, characterized in that, The positioning plate (102) is connected to the end cap (101) by bolts.
10. The tubular motor for roller shutter doors according to claim 8, characterized in that, A threaded groove (207) is provided on the fixed shaft body (202).