Door operator
By installing a support mechanism and a power opening and closing mechanism on the protective door, combined with chain drive and a dual-output shaft reducer, the problem of the existing protective door opening and closing device easily reducing the door's lifespan is solved. This achieves more uniform transmission and guidance, and improves the device's service life and adaptability to extreme working conditions.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHINA RAILWAY CONSTR HEAVY IND
- Filing Date
- 2025-08-07
- Publication Date
- 2026-07-17
AI Technical Summary
Existing protective door opening and closing devices can easily reduce the lifespan of the protective door body. Furthermore, existing wheel-type opening and closing devices occupy space, and unilateral overload and vibration transmission lead to a reduction in the lifespan of bearings and shafts, resulting in high maintenance costs.
The design employs a combination of a support mechanism and a power-operated opening and closing mechanism. The support mechanism is located at one end of the door hinge, while the power-operated opening and closing mechanism is located at the end furthest from the door hinge. It uses chain drive and a dual-output shaft reducer, combined with a convex rail and concave rail guide structure, to achieve uniform transmission and guidance, thereby reducing the force on the door hinge.
By combining the support mechanism and the power opening and closing mechanism, the load on the door hinges is reduced, the service life of the protective door is increased, vibration loss and maintenance costs are reduced, and adaptability to extreme working conditions is enhanced.
Smart Images
Figure CN224515014U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of civil defense engineering technology, specifically to an opening and closing device for a protective door. Background Technology
[0002] Most existing protective doors use hydraulic cylinders or linkage mechanisms for opening and closing. Neither of these methods provides support for the door body, causing the entire weight of the door to be borne by the hinges, which greatly reduces the service life of the protective door. Existing wheel-type opening and closing devices use side-mounted motors, which take up space. Placing the motor on one side will cause unilateral overload, which will greatly reduce the service life of bearings and shafts. Moreover, the rigid connection between the reducer and the support wheel assembly leads to vibration transmission and a high motor failure rate, thereby increasing maintenance costs and time. Utility Model Content
[0003] The purpose of this utility model is to provide an opening and closing device for a protective door, so as to solve the technical problem that the opening and closing devices of existing protective doors easily reduce the life of the protective door body. The specific technical solution is as follows:
[0004] This utility model provides an opening and closing device for a protective door, comprising: a support mechanism, the support mechanism including a first wheel frame and a first wheel assembly; the first wheel assembly is rotatably mounted on the first wheel frame, the first wheel frame being used to install on the lower part of the protective door and located at the end near the door hinge; a power opening and closing mechanism, the power opening and closing mechanism including a second wheel frame, a second wheel assembly and a drive assembly; the second wheel assembly is rotatably mounted on the second wheel frame, the second wheel frame being used to install on the lower part of the protective door and located at the end away from the door hinge; the drive assembly is mounted on the second wheel frame, the drive assembly being drivenly connected to the second wheel frame.
[0005] A further improvement of the opening and closing device of the protective door of this utility model is that the drive assembly includes a motor, a reducer and a transmission component, the output shaft of the motor is connected to the input shaft of the reducer, and the transmission component is driven between the output shaft of the reducer and the second wheel frame.
[0006] A further improvement of the opening and closing device of the protective door of this utility model is that the transmission component is a chain, the output shaft of the reducer is provided with a first sprocket, the side of the second wheel group is provided with a second sprocket, and the chain meshes with the first sprocket and the second sprocket.
[0007] A further improvement of the opening and closing device of the protective door of this utility model is that the reducer is a dual-output shaft reducer, and there are two chains, two first sprockets and two second sprockets. The two first sprockets are respectively located on the output shafts on both sides of the dual-output shaft reducer, and the two second sprockets are respectively located on both sides of the second wheel group. The two chains are meshed with the first sprocket and the second sprocket in a one-to-one correspondence.
[0008] A further improvement of the opening and closing device of the protective door of this utility model is that the support mechanism further includes a first support base and a first lifting drive component. The first support base is used to fix the lower part of the protective door and is located above the first wheel frame. The first lifting drive component is connected between the first support base and the second wheel frame.
[0009] A further improvement of the opening and closing device of the protective door of this utility model is that the support mechanism also includes a convex rail for fixing to the lower part of the protective door, and the back of the first wheel assembly is provided with a concave rail that matches the convex rail.
[0010] A further improvement of the opening and closing device of the protective door of this utility model is that the first lifting drive component is a hydraulic cylinder.
[0011] This utility model also provides a protective door, including the opening and closing device of the protective door as described above.
[0012] The application of the technical solution of this utility model has the following beneficial effects:
[0013] The opening and closing device of this utility model for a protective door provides support for the door by setting a support mechanism at the lower part of the door and the end closest to the door hinge, and provides auxiliary opening and closing by setting a power opening and closing mechanism at the lower part of the door and the end furthest from the door hinge. The first wheel group and the second wheel group can meet the auxiliary movement of the protective door during opening and closing, reduce the load on the door hinge, and solve the technical problem that the opening and closing device of the existing protective door is prone to reducing the life of the protective door.
[0014] The drive assembly features a centrally located power arrangement integrating the motor, reducer, and transmission components. The dual-output shaft drive structure ensures more even transmission and load distribution, increases dynamic balance, and significantly extends service life. Chain drive greatly reduces vibration losses, lowers maintenance costs, and enhances adaptability to extreme working conditions. A convex and concave rail structure provides guidance, preventing uneven load distribution on the cylinders during opening and closing. Adjustable hydraulic support dynamically compensates for height differences based on terrain (or guide rails).
[0015] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The present utility model will now be described in further detail with reference to the figures. Attached Figure Description
[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:
[0017] Figure 1 This is a front view of the power opening and closing mechanism of the protective door opening and closing device of this utility model;
[0018] Figure 2 This is a side view of the power opening and closing mechanism of the protective door opening and closing device of this utility model;
[0019] Figure 3 This is a front view of the support mechanism of the opening and closing device of the protective door of this utility model;
[0020] Figure 4 This is a schematic diagram of the opening and closing device of the protective door of this utility model installed on the protective door.
[0021] Among them, 1. second support base; 2. second lifting drive component; 3. motor; 4. second wheel frame; 5. reducer; 6. chain; 7. second wheel set; 8. second sprocket; 9. convex rail; 10. concave rail; 11. first sprocket; 12. first support base; 13. first wheel frame; 14. first wheel set; 15. power opening and closing mechanism; 16. support mechanism; 17. protective door; 18. door hinge. Detailed Implementation
[0022] The embodiments of this utility model will be described in detail below with reference to the accompanying drawings.
[0023] See Figures 1-4 As shown, an opening and closing device for a protective door includes: a support mechanism 16, which includes a first wheel frame 13 and a first wheel assembly 14; the first wheel assembly 14 is rotatably mounted on the first wheel frame 13, and the first wheel frame 13 is used to be installed on the lower part of the protective door 17 and located at one end near the door hinge 18; a power opening and closing mechanism 15, which includes a second wheel frame 4, a second wheel assembly 7, and a drive assembly; the second wheel assembly 7 is rotatably mounted on the second wheel frame 4, and the second wheel frame 4 is used to be installed on the lower part of the protective door 17 and located at one end away from the door hinge 18; the drive assembly is mounted on the second wheel frame 4 and is drivenly connected to the second wheel frame 4.
[0024] like Figure 1 and Figure 3 As shown, the structure of the first wheel frame 13 is the same as that of the second wheel frame 4, the only difference being that the upper middle part of the second wheel frame 4 has space for installing the drive assembly. The support mechanism 16 only serves a supporting function, therefore there is no need to install power structures such as the motor 3 and the reducer 5 in the middle. The support mechanism 16 is installed near the door hinge 18, serving a supporting function to reduce the pressure on the door hinge. The power opening and closing mechanism 15 is installed away from the door hinge 18, serving to support and initiate the opening and closing power. Figure 4 As shown, the number of support mechanisms 16 and power opening and closing mechanisms 15 can be adjusted according to the size of the protective door 17, and they are installed at intervals on the lower part of the protective door 17.
[0025] Preferred, such as Figure 1 As shown, the drive assembly includes a motor 3, a reducer 5, and a transmission component. The output shaft of the motor 3 is connected to the input shaft of the reducer 5, and the transmission component is connected between the output shaft of the reducer 5 and the second wheel frame 4. Specifically, the motor 3 is vertically mounted directly above the reducer 5, and the second wheel set 7 is mounted at the lower part of the wheel frame. The reducer 5 can match the speed and torque of the motor 3, enabling the transmission component to drive the second wheel set 7 to rotate at a normal speed, thereby ensuring stable movement of the protective door 17 during opening and closing.
[0026] Preferred, such as Figure 1 and Figure 2 As shown, the transmission component is a chain 6. A first sprocket 11 is mounted on the output shaft of the reducer 5, and a second sprocket 8 is located on the side of the second wheel assembly 7. The chain 6 meshes with the first sprocket 11 and the second sprocket 8. Specifically, the second sprocket 8 is coaxially arranged with the second wheel assembly 7, and the diameter of the second sprocket 8 is smaller than (slightly smaller than) the diameter of the second wheel assembly 7, thereby preventing the chain 6 from contacting the ground and affecting the transmission effect. Using chain 6 for transmission significantly reduces vibration loss, lowers maintenance costs, and enhances adaptability to extreme working conditions.
[0027] Preferably, the reducer 5 is a dual-output-shaft reducer 5, with two chains 6, two first sprockets 11, and two second sprockets 8. The two first sprockets 11 are respectively located on the output shafts on both sides of the dual-output-shaft reducer 5, and the two second sprockets 8 are respectively located on both sides of the second wheel assembly 7. The two chains 6 mesh one-to-one with the first sprockets 11 and the second sprockets 8. The motor 3, reducer 5, and transmission components are integrated into a centrally located power arrangement. The dual-output-shaft transmission structure makes the transmission and load distribution more uniform, increases dynamic balance, and greatly extends service life.
[0028] Preferably, the support mechanism 16 further includes a first support base 12 and a first lifting drive component. The first support base 12 is fixed to the lower part of the protective door 17 and located above the first wheel frame 13. The first lifting drive component is connected between the first support base 12 and the second wheel frame 4. Further, the power opening and closing mechanism 15 also includes a second support base 1 and a second lifting drive component 2. The second support base 1 is fixed to the lower part of the protective door 17 and located above the second wheel frame 4. The second lifting drive component 2 is connected between the second support base 1 and the second wheel frame 4. The first lifting drive component / second lifting drive component 2 can drive the first wheel frame 13 / second wheel frame 4 to rise and fall, thereby dynamically compensating for height differences according to the terrain (or guide rail).
[0029] Preferably, the support mechanism 16 further includes a convex rail 9 for fixing to the lower part of the protective door 17, and the back of the first wheel assembly 14 is provided with a concave rail 10 that cooperates with the convex rail 9. The power opening and closing mechanism 15 also has the same guide structure of convex rail 9 and concave rail 10. This provides guidance for the vertical extension and retraction of the support mechanism 16 / power opening and closing mechanism 15. Through the guidance of the convex rail 9 and concave rail 10, the first lifting drive component is prevented from being subjected to off-center load during opening and closing.
[0030] Preferably, the first lifting drive component is a hydraulic cylinder, so as to facilitate the overall height adjustment of the device.
[0031] This utility model also provides a protective door, including the opening and closing device of the protective door as described above.
[0032] The opening and closing device of this utility model for a protective door provides support for the protective door 17 by setting a support mechanism 16 at the lower part of the protective door 17 and at the end close to the door hinge 18. It also provides an auxiliary opening and closing mechanism 15 at the lower part of the protective door 17 and at the end away from the door hinge 18. The first wheel group 14 and the second wheel group 7 can meet the auxiliary movement of the protective door 17 during opening and closing, reducing the load on the door hinge 18 and solving the technical problem that the opening and closing device of the protective door 17 in the prior art easily reduces the life of the protective door 17.
[0033] The drive assembly features a centrally located power arrangement integrating the motor (3), reducer (5), and transmission components. The dual-output shaft transmission structure ensures more even transmission and load distribution, increases dynamic balance, and significantly extends service life. The use of chain drive (6) greatly reduces vibration loss, lowers maintenance costs, and enhances adaptability to extreme working conditions. A convex rail (9) and concave rail (10) structure provides guidance, preventing uneven load distribution on the hydraulic cylinder during opening and closing. Adjustable hydraulic support dynamically compensates for height differences based on terrain (or guide rails).
[0034] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A device for opening and closing a protective door, characterized in that, include: The support mechanism (16) includes a first wheel frame (13) and a first wheel set (14); the first wheel set (14) is rotatably mounted on the first wheel frame (13), and the first wheel frame (13) is used to be mounted on the lower part of the protective door (17) and located at one end near the door hinge (18); The power opening and closing mechanism (15) includes a second wheel frame (4), a second wheel set (7), and a drive assembly; the second wheel set (7) is rotatably mounted on the second wheel frame (4), the second wheel frame (4) is used to be mounted on the lower part of the protective door (17) and located at one end away from the door hinge (18); the drive assembly is mounted on the second wheel frame (4) and the drive assembly is drivenly connected to the second wheel frame (4).
2. A door operator as claimed in claim 1, wherein the door operator is configured to: The drive assembly includes a motor (3), a reducer (5) and a transmission component. The output shaft of the motor (3) is connected to the input shaft of the reducer (5), and the transmission component is connected between the output shaft of the reducer (5) and the second wheel frame (4).
3. A door operator as claimed in claim 2, wherein the door operator is configured to determine the position of the door by detecting the position of the door in the door aperture. The transmission component is a chain (6), and the output shaft of the reducer (5) is provided with a first sprocket (11), and the side of the second wheel set (7) is provided with a second sprocket (8). The chain (6) meshes with the first sprocket (11) and the second sprocket (8).
4. A door operator as claimed in claim 3, wherein the door operator is configured to determine the position of the door by detecting the position of the door in the door aperture. The reducer (5) is a dual-output shaft reducer (5). There are two chains (6), two first sprockets (11) and two second sprockets (8). The two first sprockets (11) are respectively located on the output shafts on both sides of the dual-output shaft reducer (5). The two second sprockets (8) are respectively located on both sides of the second wheel set (7). The two chains (6) are meshed with the first sprocket (11) and the second sprocket (8) in a one-to-one correspondence.
5. The door operator of claim 1, wherein, The support mechanism (16) further includes a first support base (12) and a first lifting drive component. The first support base (12) is used to fix the lower part of the protective door (17) and is located above the first wheel frame (13). The first lifting drive component is connected between the first support base (12) and the second wheel frame (4).
6. A door operator as claimed in claim 5, wherein the door operator is configured to determine the position of the door by detecting the position of the door in the door aperture. The support mechanism (16) also includes a convex rail (9) for fixing to the lower part of the protective door (17), and the back of the first wheel assembly (14) is provided with a concave rail (10) that cooperates with the convex rail (9).
7. A door operator as claimed in claim 5, wherein the door operator is configured to operate the door in the first direction and the second direction. The first lifting drive component is a hydraulic cylinder.
8. A protective door characterized by Includes the opening and closing device for the protective door as described in claim 1.