Pull rod assembly of manual-automatic integrated door closer

Abstract

The pull rod assembly of the manual-automatic integrated door closer comprises a sealing box body, an adjusting rod is arranged on the inner wall of the left side of the center position of the sealing box body in a penetrating mode, and a spring seat tube is fixedly arranged on the inner wall of the right side of the sealing box body in a penetrating mode. The adjusting rod penetrates through the sealing box body and the spring cushion and then is inserted into the adjusting sleeve, and the pull rod movably penetrates through the adjusting sleeve and the spring seat tube, so that the reset spring between the spring cushion and the spring seat tube is sleeved with the adjusting sleeve and the pull rod, the pull rod is effectively limited, irreversible damage to the reset spring is prevented, and the service life of the reset spring is prolonged. A threaded locking head on the pull rod is inserted into a threaded hole in the pull rod connecting seat and is in threaded connection and fixation, and a pull piece is matched with a plurality of positioning pins to be fixed on the pull rod connecting seat, so that the pull piece is matched with the pull rod connecting seat to transmit stress to the pull rod for displacement adjustment, and the pull rod is prevented from being directly stressed; the service life of the pull rod is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of door closer lever technology, and in particular to a lever assembly for a manual / automatic door closer. Background Technology

[0002] A door closer is a device that enables a door to automatically reset and remain closed after it has been closed. The door closer lever is a part of the door closer and is used to control the opening and closing of doors and windows. The door closer lever is usually made of a metal transmission rod. By adjusting the length and position of the door closer lever, the speed and force of closing the door and window can be controlled to ensure that the door can be closed smoothly and safely.

[0003] Existing door closer lever assemblies lack limiting structures in their lever sections, which can easily lead to lever displacement and irreversible damage to the return spring, affecting its service life. Furthermore, the levers are directly subjected to force, further impacting their lifespan. To address these issues, a lever assembly for a manual / automatic door closer is proposed. Utility Model Content

[0004] To address the shortcomings and defects in existing technologies, this utility model proposes a pull rod assembly for a manual / automatic door closer. This assembly solves the technical problems in the background technology where, during actual use, the pull rod section of the existing door closer pull rod assembly lacks a limiting structure, which easily leads to pull rod displacement and causes irreversible damage to the return spring, affecting the service life of the return spring. Furthermore, the pull rod is directly subjected to force, which also affects the service life of the pull rod.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A lever assembly for a manual / automatic door closer includes a sealed housing. An adjusting rod is provided through the left inner wall at the center of the sealed housing, and a spring seat tube is fixedly provided through the right inner wall of the sealed housing. A pull rod is provided between the adjusting rod and the spring seat tube. The pull rod is movably provided through the spring seat tube. A pull rod connecting seat is provided at one end of the pull rod outside the sealed housing, and a pull tab is provided at the end of the pull rod connecting seat away from the pull rod.

[0007] Preferably, a spring pad is fixedly connected to the left inner wall of the sealed box, an adjusting sleeve is fixedly connected to the right side wall of the spring pad, the left end of the pull rod is horizontally movable through the right inner wall of the adjusting sleeve, a return spring is fixedly connected to the spring seat tube, and the return spring is sleeved on the pull rod and the adjusting sleeve.

[0008] Preferably, the pull rod and adjusting sleeve are both made of wear-resistant alloy, and the spring seat tube and spring pad are made of wear-resistant rubber.

[0009] Preferably, the left side wall of the pull rod connector is provided with a threaded hole, and the end of the pull rod located outside the sealed box is provided with a threaded locking head, which is threadedly connected to the threaded hole.

[0010] Preferably, the threaded locking head and the pull rod are integrally formed.

[0011] Preferably, the end of the pull rod connecting seat away from the pull rod is provided with a plurality of positioning pins, and the plurality of positioning pins are fixedly inserted through the pull rod connecting seat and the pull tab.

[0012] Compared with the prior art, the advantages of this utility model are as follows:

[0013] 1. By inserting the adjusting rod through the sealing housing and spring pad into the adjusting sleeve, and then moving the pull rod through the adjusting sleeve and spring seat tube, the return spring between the spring pad and the spring seat tube is connected to the adjusting sleeve and the pull rod, effectively limiting the pull rod, preventing irreversible damage to the return spring, and extending the service life of the return spring.

[0014] 2. By inserting the threaded locking head on the pull rod into the threaded hole on the pull rod connecting seat and fixing it with threads, the pull plate is fixed on the pull rod connecting seat with several positioning pins. This allows the pull plate and the pull rod connecting seat to transmit the force to the pull rod for displacement adjustment, preventing the pull rod from being directly subjected to force and extending the service life of the pull rod. Attached Figure Description

[0015] Figure 1 This is a perspective view of the pull rod assembly of a manual / automatic door closer according to the present invention.

[0016] Figure 2 This is a schematic diagram of the spring seat tube of the pull rod assembly of a manual / automatic door closer according to the present invention.

[0017] Figure 3 This is a schematic diagram of the pull rod connecting seat and pull tab of the pull rod assembly of a manual / automatic door closer proposed in this utility model.

[0018] In the diagram: 1. Sealed housing, 2. Adjusting rod, 3. Spring seat tube, 4. Pull rod, 5. Pull rod connecting seat, 6. Pull plate, 7. Spring pad, 8. Adjusting sleeve, 9. Return spring, 10. Threaded hole, 11. Threaded locking head, 12. Positioning pin. Detailed Implementation

[0019] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., 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.

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0021] Reference Figure 1-3 A lever assembly for a manual / automatic door closer includes a sealed housing 1. An adjusting rod 2 is inserted through the left inner wall at the center of the sealed housing 1. A spring seat tube 3 is fixedly inserted through the right inner wall of the sealed housing 1. A lever 4 is provided between the adjusting rod 2 and the spring seat tube 3. The lever 4 is movably inserted through the spring seat tube 3. A spring pad 7 is fixedly connected to the left inner wall of the sealed housing 1. An adjusting sleeve 8 is fixedly connected to the right inner wall of the spring pad 7. The left end of the lever 4 is horizontally movably inserted through the right inner wall of the adjusting sleeve 8. A return spring 9 is fixedly connected to the spring seat tube 3. The return spring 9 is sleeved on the lever 4 and the adjusting sleeve 8. When the lever 4 is displaced by force, the lever 4 moves along the adjusting sleeve 8 and compresses the return spring 9. The adjusting rod 2 limits the range of movement of the lever 4 within the adjusting sleeve 8, effectively limiting the lever 4 and preventing irreversible damage to the return spring 9, thus extending the service life of the return spring 9. The lever 4 and the adjusting sleeve 8 are both wear-resistant alloy products, and the spring seat tube 3 and the spring pad 7 are wear-resistant rubber products.

[0022] A pull rod 4 is provided with a pull rod connecting seat 5 at one end outside the sealed housing 1. A threaded hole 10 is provided on the left side wall of the pull rod connecting seat 5. A threaded locking head 11 is provided at the other end of the pull rod 4 outside the sealed housing 1. The threaded locking head 11 is threadedly connected to the threaded hole 10. The threaded locking head 11 and the threaded hole 10 fix the other end of the pull rod 4 outside the sealed housing 1 to the pull rod connecting seat 5. The threaded locking head 11 and the pull rod 4 are integrally formed. A pull piece 6 is provided at the other end of the pull rod connecting seat 5 away from the pull rod 4. Several positioning pins 12 are provided at the other end of the pull rod connecting seat 5 away from the pull rod 4. The positioning pins 12 are fixedly inserted through the pull rod connecting seat 5 and the pull piece 6. The positioning pins 12 are used to fix the pull piece 6 at the other end of the pull rod connecting seat 5 away from the pull rod 4. The pull piece 6, in conjunction with the pull rod connecting seat 5, transmits the force to the pull rod 4 for displacement adjustment, preventing the pull rod 4 from being directly subjected to force and extending the service life of the pull rod 4.

[0023] In use, the adjusting rod 2 is horizontally inserted through the sealing housing 1 and the spring pad 7 and then inserted into the adjusting sleeve 8. The pull rod 4 is movably inserted through the adjusting sleeve 8 and the spring seat tube 3, so that the return spring 9 between the spring pad 7 and the spring seat tube 3 is sleeved on the adjusting sleeve 8 and the pull rod 4. When the pull rod 4 is displaced under force, the pull rod 4 moves along the adjusting sleeve 8 and compresses the return spring 9. The adjusting rod 2 restricts the movement range of the pull rod 4 within the adjusting sleeve 8, effectively limiting the pull rod 4 and preventing irreversible damage to the return spring 9, thus extending the service life of the return spring 9. The threaded locking head 11 on the pull rod 4 is inserted into the threaded hole 10 on the pull rod connecting seat 5 and threadedly connected and fixed. The pull piece 6 is fixed on the pull rod connecting seat 5 with several positioning pins 12, so that the pull piece 6, together with the pull rod connecting seat 5, transmits the force to the pull rod 4 for displacement adjustment, preventing the pull rod 4 from being directly subjected to force and extending the service life of the pull rod 4.

[0024] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A pull rod assembly of a hand-automatic door closer comprising a sealed box (1), characterized in that, The left side inner wall of the sealing box (1) is provided with an adjusting rod (2) penetrating through the center position, the right side inner wall of the sealing box (1) is fixedly provided with a spring seat pipe (3) penetrating through, the adjusting rod (2) and the spring seat pipe (3) are provided with the same pull rod (4) therebetween, the pull rod (4) is movably penetrating through the spring seat pipe (3), one end of the pull rod (4) located outside the sealing box (1) is provided with a pull rod connecting seat (5), and the pull rod connecting seat (5) is provided with a pull tab (6) away from the pull rod (4).

2. A pull rod assembly for a hands-free door closer according to claim 1, wherein, The left side inner wall of the sealing box (1) is fixedly connected with a spring pad (7), the right side wall of the spring pad (7) is fixedly connected with an adjusting sleeve (8), the left end of the pull rod (4) is movably penetrating through the right side inner wall of the adjusting sleeve (8), the spring seat pipe (3) is fixedly connected with a reset spring (9), and the reset spring (9) is sleeved with the pull rod (4) and the adjusting sleeve (8).

3. A pull rod assembly for a manual / automatic door closer according to claim 2, wherein The pull rod (4) and the adjusting sleeve (8) are wear-resistant alloy products, and the spring seat pipe (3) and the spring pad (7) are wear-resistant rubber products.

4. A pull rod assembly for a manual / automatic door closer according to claim 1, wherein The left end side wall of the pull rod connecting seat (5) is provided with a threaded hole (10), one end of the pull rod (4) located outside the sealing box (1) is provided with a threaded locking head (11), and the threaded locking head (11) is in threaded connection with the threaded hole (10).

5. A pull rod assembly for a manual / automatic door closer according to claim 4, wherein The threaded locking head (11) and the pull rod (4) are integrally formed.

6. A pull rod assembly for a manual / automatic door closer according to claim 1, wherein The end of the pull rod connecting seat (5) away from the pull rod (4) is provided with a plurality of positioning pins (12), and the plurality of positioning pins (12) are fixedly penetrating through the pull rod connecting seat (5) and the pull tab (6).

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