Anti-impact door opening mechanism

Abstract

The utility model relates to the technical field of protective engineering, and discloses an anti-impact door opening mechanism which comprises an electric control opening and closing mechanism, a folding arm and a stay wire type sensor, and the electric control opening and closing mechanism is arranged on a door frame wall on the inner side of a door and comprises an electric driver, a first speed reducer and a second speed reducer which are sequentially connected; the folding arm comprises a first swing rod and a second swing rod; the first end of the first swing rod is connected with an output shaft of the second speed reducer, the second end of the first swing rod is hinged to the first end of the second swing rod, and the second end of the second swing rod is connected with the door leaf so that the door leaf can be opened or closed under driving of the electric control opening and closing mechanism. The stay wire type sensor is arranged on a door frame wall on the inner side of a door, a stay rope of the stay wire type sensor is connected with the door leaf, and the stay wire type sensor is in signal connection with the electric control opening and closing mechanism so that the real-time opening and closing angle of the door leaf can be fed back to the electric control opening and closing mechanism. The electric control opening and closing mechanism is arranged on the door frame wall on the inner side of the door, so that the degree of strong vibration of the electric control opening and closing mechanism along with the door leaf is reduced, and impact damage is avoided.

Description

Technical Field

[0001] This utility model relates to the field of protective engineering technology, specifically an impact-resistant door opening mechanism. Background Technology

[0002] The doors of protective equipment vibrate violently when subjected to shock waves. This is especially true for electrically operated protective doors, where the drive mechanism and electrical control system are located on the door leaf. With the intense vibration of the door leaf, the electrical control and drive system is easily damaged. Therefore, those skilled in the art urgently need to design an impact-resistant door opening mechanism. Utility Model Content

[0003] The purpose of this utility model is to provide an impact-resistant door opening mechanism to solve the problems in the background art, such as the door leaf being easily damaged by strong vibrations.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] An impact-resistant door opening mechanism, comprising:

[0006] An electrically controlled opening and closing mechanism is installed on the door frame wall inside the door. The electrically controlled opening and closing mechanism includes an electric driver, a first reducer, and a second reducer connected in sequence. The axes of the electric driver and the first reducer both extend along a first direction. The input shaft of the second reducer extends along the first direction. The output shaft of the second reducer extends along a second direction. The axis of the door leaf's rotating shaft extends along a third direction. The first direction, the second direction, and the third direction are perpendicular to each other.

[0007] A folding arm, comprising a first swing arm and a second swing arm; a first end of the first swing arm is connected to the output shaft of a second reducer, a second end of the first swing arm is hinged to the first end of the second swing arm, and a second end of the second swing arm is connected to a door leaf to open or close the door leaf under the drive of an electronically controlled opening and closing mechanism;

[0008] A pull-cord sensor is installed on the inner side of the door frame wall. The pull cord of the sensor is connected to the door leaf, and the sensor is also connected to the electronic opening and closing mechanism to provide real-time feedback on the door leaf's opening and closing angle. By placing the pull-cord sensor at a distance from the door leaf, the degree to which the electronic opening and closing mechanism and the pull-cord sensor are subjected to strong vibrations from the door leaf under heavy impact loads is reduced, thus preventing impact damage.

[0009] Furthermore, the plane of the electrically controlled opening and closing mechanism is higher than the plane of the folding arm to reduce the space occupied by the door opening.

[0010] Furthermore, the electric drive, the first reducer, and the second reducer are partially embedded in the door frame wall inside the door to reduce the space occupied by the door opening.

[0011] Furthermore, it also includes an anti-shock clutch, the axis of which extends along a first direction. The output shaft of the first reducer is connected to the driving end of the anti-shock clutch, and the driven end of the anti-shock clutch is connected to the input shaft of the second reducer. By providing an anti-shock clutch, the vibration and shock acting on the electromagnetic clutch are reduced, as are the vibration and shock transmitted to the first reducer and the electric drive.

[0012] Furthermore, the shock-resistant clutch includes an electromagnetic clutch, a fixed shaft, and a sleeve; the sleeve is connected to the driven end of the electromagnetic clutch and is coaxially arranged with the electromagnetic clutch; the fixed shaft is disposed inside the electromagnetic clutch; the output shaft of the first reducer is connected to the fixed shaft; and the sleeve is connected to the input shaft of the second reducer. By incorporating the electromagnetic clutch, this door opening mechanism can be operated manually or electrically, allowing manual opening when the electrically controlled opening and closing mechanism fails.

[0013] Furthermore, it also includes a first buffer and a second buffer; the first buffer is provided between the fixed shaft and the output shaft of the first reducer, and the second buffer is provided between the sleeve and the input shaft of the second reducer. Electromagnetic clutches have low shock resistance; to improve their shock resistance, buffers are added to both ends of the electromagnetic clutch assembly to reduce the vibration and impact acting on the electromagnetic clutch.

[0014] Furthermore, the first end of the fixed shaft is located within the inner cavity of the sleeve, and the fixed shaft is connected to the inner wall of the sleeve via a bearing. With this arrangement, the fixed shaft can be used to transmit power.

[0015] Furthermore, it also includes a shaft retaining ring, a bore retaining ring, and a non-magnetic washer; a shaft retaining ring is provided between the first end of the fixed shaft and the bearing; a bore retaining ring is provided between the bearing and the inner wall of the sleeve; and a non-magnetic washer is provided between the fixed shaft and the driven end of the electromagnetic clutch. This arrangement ensures that the axis of the electromagnetic clutch is fixed, guaranteeing the accurate clearance required for its installation.

[0016] Furthermore, the second end of the fixed shaft extends outward to the driving end of the electromagnetic clutch, and the second end of the fixed shaft has a fixing groove for connecting the output shaft of the first reducer.

[0017] Furthermore, the inner wall of the fixed groove is provided with a first flat keyway to connect the output shaft of the first reducer to the second end of the fixed shaft as a whole, and the end of the sleeve away from the fixed shaft is provided with a second flat keyway to connect the input shaft of the second reducer.

[0018] Furthermore, the electric drive is a motor.

[0019] Furthermore, the second reducer is a bevel gear commutator with excellent impact resistance.

[0020] This invention has the following advantages over the prior art:

[0021] This utility model discloses an impact-resistant door opening mechanism, comprising an electrically controlled opening and closing mechanism, a folding arm, and a pull-wire sensor. The electrically controlled opening and closing mechanism is mounted on the inner side of the door frame wall, while the pull-wire sensor is positioned at a distance from the door leaf. This reduces the degree to which the electrically controlled opening and closing mechanism and the pull-wire sensor are subjected to strong vibrations from the door leaf under heavy impact loads, thus preventing impact damage. To further reduce impact, a second reducer with excellent impact resistance is installed near the point of most severe impact on the door, while the first reducer with lower impact resistance and the electric actuator are positioned further away from the door leaf. Through this two-stage stepped deceleration, the vibration and impact on the first reducer and the electric actuator are reduced.

[0022] The impact-resistant clutch of this invention includes an electromagnetic clutch, a fixed shaft, and a sleeve. The sleeve is connected to the driven end of the electromagnetic clutch, and the fixed shaft is disposed inside the electromagnetic clutch. Supporting components such as shaft retaining rings, bore retaining rings, and non-magnetic washers are provided between the fixed shaft and the driven end of the electromagnetic clutch. A first buffer is provided at the connection between the fixed shaft and the first reducer, and a second buffer is provided at the connection between the sleeve and the second reducer. This arrangement ensures the precise design clearance of the electromagnetic clutch through strong internal support, while external buffering and vibration isolation reduce the impact on the impact-sensitive electromagnetic clutch. Furthermore, by incorporating the electromagnetic clutch, this door-opening mechanism can be operated manually or electrically. When energized, the driving and driven ends of the electromagnetic clutch engage, and the door is opened electrically by the electric actuator. When de-energized, the driving and driven ends of the electromagnetic clutch disengage, reducing the braking torque of the electric actuator to zero, allowing the door to be opened manually. Attached Figure Description

[0023] Figure 1 This is a plan view of the impact-resistant door opening mechanism in an embodiment of the present utility model;

[0024] Figure 2 for Figure 1 Side view;

[0025] Figure 3 This is a schematic diagram of the anti-impact clutch in an embodiment of the present invention;

[0026] In the diagram: 1. Door frame wall inside the door; 2. Door leaf; 3. Electric actuator; 4. First reducer; 5. Second reducer; 6. First rocker arm; 7. Second rocker arm; 8. Wire-type sensor; 9. Shock-resistant clutch; 10. Electromagnetic clutch; 1001. Driving end; 1002. Passive end; 11. Fixed shaft; 1101. Fixed groove; 12. Sleeve; 13. First buffer; 14. Second buffer; 15. Bearing; 16. Shaft retaining ring; 17. Hole retaining ring; 18. Non-magnetic washer; 19. First flat keyway; 20. Second flat keyway; 21. Support; 22. Door leaf pivot; X, First direction; Y, Second direction. Detailed Implementation

[0027] The technical solutions of the present utility model 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 utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] It should be noted that in the description of this utility model, the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] Furthermore, it should be understood that, for ease of description, the dimensions of the various components shown in the accompanying drawings are not drawn to actual scale.

[0030] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined or described in one figure, it will not need to be further discussed and described in the description of the subsequent figures.

[0031] Example:

[0032] like Figures 1 to 2As shown, this utility model provides an impact-resistant door opening mechanism, including: an electrically controlled opening and closing mechanism, a folding arm, and a pull-wire sensor 8; wherein, the electrically controlled opening and closing mechanism is set on the door frame wall 1 on the inner side of the door. In the prior art, the opening and closing mechanism is generally installed on the door leaf, that is, installed on the outer side or the inner side of the door leaf. When the opening and closing mechanism is installed on the outer side of the door leaf, it is directly impacted when hit, and is easily damaged directly; when the opening and closing mechanism is installed on the inner side of the door leaf, it vibrates strongly with the door leaf when hit, and the electrically controlled drive system is easily damaged. In this embodiment, the electrically controlled opening and closing mechanism is set on the door frame wall on the inner side of the door, which can avoid the opening and closing mechanism being directly hit, and also reduce the degree of strong vibration of the electrically controlled opening and closing mechanism with the door leaf 2, thus avoiding impact damage. The electrically controlled opening and closing mechanism includes an electric drive 3, a first reducer 4, and a second reducer 5 connected in sequence; the axes of the electric drive 3 and the first reducer 4 are both along a first direction ( Figure 2 The input shaft of the second reducer 5 extends along the first direction, and the output shaft of the second reducer 5 extends along the second direction. Figure 2 The axis of the door leaf pivot 22 extends along a third direction (Y-direction), and the first direction, second direction, and third direction are perpendicular to each other. The electric drive 3 is a motor, and the second reducer 5 is a bevel gear commutator with excellent impact resistance. To further reduce impact, a two-stage reduction is set. The second reducer 5 (small reduction ratio) with excellent impact resistance is set near the door where the impact is severe, while the first reducer 4 (large reduction ratio) with lower impact resistance and the electric drive 3 are set away from the door leaf. Through two-stage stepped reduction, the vibration and impact on the first reducer and the electric drive are reduced.

[0033] The folding arm includes a first swing arm 6 and a second swing arm 7. The first end of the first swing arm 6 is connected to the output shaft of the second reducer 5, and the second end of the first swing arm 6 and the first end of the second swing arm 7 are hinged together by a pivot. The second end of the second swing arm 7 is connected to the door leaf 2. The electric drive 3 drives the output shaft of the second reducer to rotate, thereby causing the first swing arm 6 to swing, so that the second swing arm 7 can open or close the door leaf 2. The first swing arm 6 and the output shaft of the second reducer 5 are fixed with an elastic cylindrical pin, which plays a dual role in transmitting torque and bearing the weight of the swing arm, eliminating the need for fixing methods such as supports and bearings, and greatly reducing the space occupied.

[0034] The pull-wire sensor is installed on the door frame wall inside the door. The pull cord of the sensor is connected to the door leaf, and the sensor is also connected to the electronic opening and closing mechanism to provide real-time feedback of the door leaf's opening and closing angle. In existing technologies, sensors are often placed on the door hinges, door frame, and door leaf. Sensors close to the door leaf are subjected to significant impact when the door leaf vibrates. In this invention, the pull-wire sensor is placed at a distance from the door leaf to avoid impact damage.

[0035] In this embodiment, traditional opening and closing mechanisms occupy a large space. To reduce the impact on the door frame wall, a flat design is adopted. Within the door opening plane, the electrically controlled opening and closing mechanism coincides with or is higher than the plane where the folding arm is located, minimizing the impact on the door opening space and the door frame wall. In specific implementation, one or more of the electric drive, the first reducer, and the second reducer can be partially embedded in the door frame wall on the inner side of the door through the support 21 to reduce the space occupied by the door opening.

[0036] like Figure 1 and Figure 3 As shown, this embodiment also includes an anti-shock clutch, the axis of which extends along a first direction. The output shaft of the first reducer 4 is connected to the driving end of the anti-shock clutch 9, and the driven end of the anti-shock clutch 9 is connected to the input shaft of the second reducer 5. By providing the anti-shock clutch 9, the vibration and shock acting on the electromagnetic clutch 10 are reduced, as are the vibration and shock transmitted to the first reducer and the electric drive via the electromagnetic clutch 10.

[0037] Specifically, such as Figure 3 As shown, the anti-impact clutch 9 includes an electromagnetic clutch 10, a fixed shaft 11, and a sleeve 12. The sleeve 12 is connected to the driven end of the electromagnetic clutch 10 and is coaxially arranged with the electromagnetic clutch 10. The fixed shaft 11 is disposed inside the electromagnetic clutch 10. The output shaft of the first reducer 4 is connected to the fixed shaft 11. The sleeve 12 is connected to the input shaft of the second reducer 5. By setting the electromagnetic clutch 10, this door opening mechanism can be used manually or electrically. When energized, the driving end 1001 and the driven end 1002 of the electromagnetic clutch 10 engage, and the door is opened electrically by the electric actuator 3. When de-energized, the driving end 1001 and the driven end 1002 of the electromagnetic clutch 10 disengage, the braking torque of the electric actuator 3 is zero, and the door can be opened manually.

[0038] A first buffer 13 and a second buffer 14 are added to both ends of the electromagnetic clutch 10; the first buffer 13 is provided between the fixed shaft 11 and the output shaft of the first reducer 4, and the second buffer 14 is provided between the sleeve 12 and the input shaft of the second reducer 5. The electromagnetic clutch 10 has low impact resistance; to improve its impact resistance, buffers are added to both ends of the electromagnetic clutch assembly to reduce the vibration and impact acting on the electromagnetic clutch. According to calculations, the buffers can be single or combined shock-absorbing devices such as rubber vibration isolators, disc springs, wire rope vibration isolators, and soft metal buffer rings.

[0039] The first end of the fixed shaft 11 is located in the inner cavity of the sleeve 12, and the fixed shaft 11 is connected to the inner wall of the sleeve 12 by a bearing 15. A deep groove ball bearing can be used. The system also includes a shaft retaining ring 16, a bore retaining ring 17, and a non-magnetic washer 18. A shaft retaining ring 16 is provided between the first end of the fixed shaft 11 and the bearing 15; a bore retaining ring 17 is provided between the bearing 15 and the inner wall of the sleeve 12; and a non-magnetic washer 18 is provided between the fixed shaft 11 and the driven end of the electromagnetic clutch 10. This arrangement ensures that the axis of the electromagnetic clutch 10 is fixed, guaranteeing the accurate clearance required for its installation.

[0040] Specifically, the second end of the fixed shaft 11 extends outward toward the driving end 1001 of the electromagnetic clutch, and a fixing groove is formed at the second end of the fixed shaft 11 for connecting the output shaft of the first reducer 4. The center line of the fixing groove 1101 is collinear with the axis of the fixed shaft 11, and a first flat keyway 19 is provided on the inner wall of the fixing groove 1101 for connecting the output shaft of the first reducer 4 to the second end of the fixed shaft 11 as a whole. A second flat keyway 20 is provided at the end of the sleeve 12 away from the fixed shaft 11 for connecting the input shaft of the second reducer 5.

[0041] In practice:

[0042] The electric drive 3, the first reducer 4, the anti-impact clutch 9, and the second reducer 5 are arranged sequentially along the first direction on the door frame wall 1 inside the door (they can be fixed to the outer wall via the support 21). To avoid occupying too much door opening space, the electric drive 3, the first reducer 4, the anti-impact clutch 9, and the second reducer 5 can be partially embedded in the wall in advance. The second reducer 5 has a deceleration and reversing function, converting the power transmission mode input along the first direction to input along the second direction. The second reducer 5 is connected to the folding arm, and through the operation of the electric drive 3, it drives the folding arm to swing, thereby opening or closing the door. When the electric control opening and closing mechanism is de-energized, the active and passive ends of the anti-impact clutch 9 separate, making the braking torque of the electric drive zero, and the door can be manually pushed open directly.

[0043] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An impact-resistant door opening mechanism, characterized in that, include: An electrically controlled opening and closing mechanism is installed on the door frame wall inside the door. The electrically controlled opening and closing mechanism includes an electric driver, a first reducer, and a second reducer connected in sequence. The axes of the electric driver and the first reducer both extend along a first direction. The input shaft of the second reducer extends along the first direction. The output shaft of the second reducer extends along a second direction. The axis of the door leaf's rotating shaft extends along a third direction. The first direction, the second direction, and the third direction are perpendicular to each other. A folding arm, comprising a first swing arm and a second swing arm; a first end of the first swing arm is connected to the output shaft of a second reducer, a second end of the first swing arm is hinged to the first end of the second swing arm, and a second end of the second swing arm is connected to a door leaf to open or close the door leaf under the drive of an electronically controlled opening and closing mechanism; A pull-wire sensor is installed on the door frame wall inside the door. The pull cord of the pull-wire sensor is connected to the door leaf. The pull-wire sensor is connected to the electronic opening and closing mechanism to provide real-time feedback of the door leaf's opening and closing angle to the electronic opening and closing mechanism.

2. The impact-resistant door opening mechanism according to claim 1, characterized in that: The plane of the electrically controlled opening and closing mechanism is higher than the plane of the folding arm to reduce the space occupied by the door opening.

3. The impact-resistant door opening mechanism according to claim 2, characterized in that: The electric drive, the first reducer, and the second reducer are partially embedded in the door frame wall inside the door to reduce the space occupied by the door opening.

4. The impact-resistant door opening mechanism according to claim 1, characterized in that: It also includes an anti-shock clutch, the axis of which extends along a first direction, the output shaft of the first reducer is connected to the driving end of the anti-shock clutch, and the driven end of the anti-shock clutch is connected to the input shaft of the second reducer.

5. The impact-resistant door opening mechanism according to claim 4, characterized in that: The shock-resistant clutch includes an electromagnetic clutch, a fixed shaft, and a sleeve; the sleeve is connected to the driven end of the electromagnetic clutch and is coaxially arranged with the electromagnetic clutch; the fixed shaft is arranged inside the electromagnetic clutch; the output shaft of the first reducer is connected to the fixed shaft; and the sleeve is connected to the input shaft of the second reducer.

6. The impact-resistant door opening mechanism according to claim 5, characterized in that: It also includes a first buffer and a second buffer; the first buffer is provided between the fixed shaft and the output shaft of the first reducer, and the second buffer is provided between the sleeve and the input shaft of the second reducer.

7. The impact-resistant door opening mechanism according to claim 5, characterized in that: The first end of the fixed shaft is located in the inner cavity of the sleeve, and the fixed shaft is connected to the inner wall of the sleeve by a bearing.

8. The impact-resistant door opening mechanism according to claim 7, characterized in that: It also includes a shaft retaining ring, a hole retaining ring, and a non-magnetic washer; a shaft retaining ring is provided between the first end of the fixed shaft and the bearing; a hole retaining ring is provided between the bearing and the inner wall of the sleeve; and a non-magnetic washer is provided between the fixed shaft and the driven end of the electromagnetic clutch.

9. The impact-resistant door opening mechanism according to claim 8, characterized in that: The second end of the fixed shaft extends outward toward the driving end of the electromagnetic clutch, and the second end of the fixed shaft has a fixing groove for connecting the output shaft of the first reducer.

10. The impact-resistant door opening mechanism according to claim 9, characterized in that: The inner wall of the fixed groove is provided with a first flat keyway to connect the output shaft of the first reducer to the second end of the fixed shaft as a whole, and the end of the sleeve away from the fixed shaft is provided with a second flat keyway to connect the input shaft of the second reducer.

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