PD door closer

Abstract

The utility model relates to the technical field of door closers, and discloses a PD door closer which comprises a shell, a cavity is formed in the shell, a spring is arranged on the inner wall of the cavity, a notch is formed in the surface of the shell, a movable clamping block is arranged on the inner wall of the notch, a connecting plate is arranged at the bottom end of the shell, a first threaded hole is formed in the bottom end of the connecting plate, and a second threaded hole is formed in the bottom end of the connecting plate. A second threaded hole is formed in the top end of the shell, a fixing block is arranged at the top end of the shell, a fixing plate is arranged at the right end of the shell, and a limiting block is arranged at the rear end of the shell. When a door starts to be closed, the door plate pushes a part connected with the door closer, the movable clamping block moves leftwards, and the spring is compressed. Due to the fact that the spring is arranged in the cavity, the inner wall of the cavity has a certain limiting effect on the spring, the spring stores elastic potential energy in the compressed process, meanwhile, the limiting block has a certain limiting effect on movement of the movable clamping block, and the movable clamping block is prevented from moving excessively to be separated from the normal working range.

Description

Technical Field

[0001] The utility model relates to the technical field of door closers, in particular to a PD door closer. Background Art

[0002] A door closer is a device installed on a door that automatically closes the door leaf after it is opened, keeping it closed. Door closers are designed to control the closing process, including speed, force, and whether to stop mid-close. They not only improve building safety and convenience, but also contribute to energy savings and maintain a stable indoor environment.

[0003] Many door closers may have complex structures. For example, this PD door closer has many components, which places high demands on the installer during installation. Once a component is installed in an inaccurate position, it may affect the overall function of the door closer. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a PD door closer.

[0005] The utility model is implemented by the following technical solutions: a PD door closer, comprising a cavity provided inside a shell, a spring provided on the inner wall of the cavity, a notch provided on the surface of the shell, a movable block provided on the inner wall of the notch, a connecting plate provided at the bottom end of the shell, a threaded hole 1 provided at the bottom end of the connecting plate, a threaded hole 2 provided at the top end of the shell, a fixing block provided at the top end of the shell, a fixing plate provided at the right end of the shell, and a limiting block provided at the rear end of the shell.

[0006] As a further improvement of the above solution, a cavity is provided inside the shell, the right end of the inner wall of the cavity is engaged with the surface of the spring, and a notch is provided at the left end of the shell.

[0007] Through the above technical solution, the housing provides space for and supports the other components within the door closer. Its internal cavity accommodates key components such as the spring, ensuring the structural integrity of the entire door closer. Slots, threaded holes, fixing blocks, limit blocks, and fixing plates are incorporated into the housing's surface, top, bottom, rear, and right ends, enabling effective connection with other components. This serves as the foundational structure for the entire door closer assembly. The spring is the key power source for the door closer's closing function. When the door is opened, the spring is compressed, storing energy. When the external force is removed, the spring releases this energy, causing the door to close.

[0008] As a further improvement of the above solution, the right end of the movable block is fixedly connected to the left end of the spring through the right end of the notch.

[0009] Through the above technical solution, the movable block is connected to the spring, which can transmit the elastic force of the spring to the appropriate position. At the same time, by cooperating with the slot, it can limit its own range of movement to a certain extent, ensuring that the direction and magnitude of force transmission meet the working requirements of the door closer.

[0010] As a further improvement of the above solution, the top of the connecting plate is fixedly connected to the bottom of the shell, four threaded holes are provided, and the four threaded holes are opened at the bottom of the connecting plate, and two threaded holes are provided, and the two threaded holes are opened at the top of the shell.

[0011] With the above technical solution, the connecting plate is located at the bottom of the housing and is fixedly connected to the housing at its top, thereby enhancing the stability of the connection between the housing and the external structure (such as the door body). In addition, the multiple threaded holes provided on the connecting plate facilitate the secure attachment of the door closer to the door body using screws or other fasteners.

[0012] As a further improvement of the above solution, the bottom end of the fixing block is fixedly connected to the top end of the shell, and the left end of the fixing plate is fixedly connected to the right end of the shell.

[0013] Through the above technical solution, the fixed block is located at the top of the shell and is fixedly connected thereto. It can increase the structural strength of the top of the shell, and at the same time, when the door closer is connected to other components (such as the structure above the door frame), it plays a role in auxiliary positioning and stabilizing the connection. The fixed plate is located at the right end of the shell and is fixedly connected thereto, providing an additional fixing point for the door closer on the side, which helps to ensure that the door closer is tightly combined with the door body when installing the door closer on the side of the door body, and prevent shaking or displacement during use.

[0014] As a further improvement of the above solution, two limit blocks are provided, and the rear ends of the two limit blocks are fixedly connected to the rear ends of the inner walls of the slots.

[0015] Through the above technical solution, the limit block is located at the rear end of the inner wall of the slot and is fixedly connected to the slot. It is mainly used to limit the range of motion of the movable block to prevent excessive movement of the movable block and damage to the internal structure of the door closer. It also helps to accurately control the working stroke of the door closer.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] The utility model realizes the stability of the overall structure through a plurality of connecting parts of the shell. For example, the connecting plate is fixedly connected to the bottom end of the shell, and four threaded holes (6) are provided at the bottom end of the connecting plate. This design helps to firmly install the door closer on the door, and enhances the stability of the overall structure on the door body. The bottom end of the fixed block is fixedly connected to the top end of the shell, the left end of the fixed plate is fixedly connected to the right end of the shell, and the rear end of the limit block is fixedly connected to the rear end of the inner wall of the slot. These fixedly connected parts reinforce the shell from different directions to prevent the displacement or shaking of the parts during the operation of the door closer.

[0018] The utility model is provided with a spring on the inner wall of the cavity, and is fixedly connected to the left end of the spring (2) by a movable clamping block. This structure is conducive to the stable placement of the spring on the inner wall of the cavity. When the door is closed, the spring can effectively store energy and release energy when the door needs to be opened, providing auxiliary power for closing and opening the door, thereby partially supporting the automatic closing and opening functions of the PD door.

[0019] Two threaded holes (2) are located on the top of the housing, and four threaded holes (1) are located on the bottom connecting plate. This multi-threaded hole design provides multiple mounting options for the door closer. This allows for flexible selection of the appropriate mounting method based on the door's specific structure and installation requirements, enhancing installation convenience. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 This is a structural diagram of a threaded hole of the utility model;

[0022] Figure 3 This is a schematic diagram of the bottom structure of the utility model;

[0023] Figure 4 This is a schematic diagram of the cross-sectional structure of the utility model.

[0024] Description of main symbols:

[0025] 1. Housing; 2. Spring; 3. Notch; 4. Movable block; 5. Connecting plate; 6. Threaded hole 1; 7. Threaded hole 2; 8. Fixing block; 9. Fixing plate; 10. Limiting block; 11. Cavity. DETAILED DESCRIPTION

[0026] Below, the present invention is further described in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0027] Example:

[0028] Please combine Figure 1-4 A PD door closer of this embodiment includes a shell 1, a cavity 11 is provided inside the shell 1, a spring 2 is provided on the inner wall of the cavity 11, a notch 3 is provided on the surface of the shell 1, a movable block 4 is provided on the inner wall of the notch 3, a connecting plate 5 is provided at the bottom end of the shell 1, a threaded hole 1 6 is provided at the bottom end of the connecting plate 5, a threaded hole 2 7 is provided at the top of the shell 1, a fixing block 8 is provided at the top of the shell 1, a fixing plate 9 is provided at the right end of the shell 1, and a limit block 10 is provided at the rear end of the shell 1.

[0029] A cavity 11 is defined inside the housing 1 , the right end of the inner wall of the cavity 11 is engaged with the surface of the spring 2 , and a notch 3 is defined at the left end of the housing 1 .

[0030] The right end of the movable block 4 is fixedly connected to the left end of the spring 2 through the right end of the notch 3 .

[0031] The top of the connecting plate 5 is fixedly connected to the bottom of the shell 1 , and four threaded holes 6 are provided, and the four threaded holes 6 are opened at the bottom of the connecting plate 5 .

[0032] There are two threaded holes 7 , and the two threaded holes 7 are opened at the top of the shell 1 .

[0033] The bottom end of the fixing block 8 is fixedly connected to the top end of the shell 1 , and the left end of the fixing plate 9 is fixedly connected to the right end of the shell 1 .

[0034] Two limit blocks 10 are provided, and the rear ends of the two limit blocks 10 are fixedly connected to the rear ends of the inner walls of the notch 3 .

[0035] The operating principle of a PD door closer in an embodiment of the present application is as follows: when the door begins to close, the door panel pushes the components connected to the door closer, causing the movable block 4 to move leftward, compressing the spring 2. Because the spring 2 is disposed within the cavity 11 and the inner wall of the cavity 11 has a certain limiting effect on the spring 2, the spring 2 stores elastic potential energy during compression. At the same time, the limit block 10 limits the movement of the movable block 4 to a certain extent, preventing the movable block 4 from excessively moving and deviating from the normal operating range. When the door needs to be opened, the compressed spring 2 releases its elastic potential energy, pushing the movable block 4 to the right. The movable block 4 drives the door panel open via the components connected to the door panel, thereby achieving the function of assisting door opening. Throughout this process, the housing 1 and its various connected components maintain the stability of the overall structure, providing a support framework for the operation of the spring 2 and the movement of the movable block 4, thereby ensuring the normal operation of the door closer.

[0036] The above embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and replacements made by technicians in this field on the basis of the present invention fall within the scope of protection required by the present invention.

Claims

1. A PD door closer, characterized in that: The invention comprises a shell (1), wherein a cavity (11) is provided inside the shell (1), a spring (2) is provided on the inner wall of the cavity (11), a notch (3) is provided on the surface of the shell (1), a movable block (4) is provided on the inner wall of the notch (3), a connecting plate (5) is provided at the bottom end of the shell (1), a threaded hole (6) is provided at the bottom end of the connecting plate (5), a threaded hole (7) is provided at the top end of the shell (1), a fixing block (8) is provided at the top end of the shell (1), a fixing plate (9) is provided at the right end of the shell (1), and a limiting block (10) is provided at the rear end of the shell (1).

2. A PD door closer according to claim 1, characterized in that: A cavity (11) is provided inside the shell (1), the right end of the inner wall of the cavity (11) is engaged with the surface of the spring (2), and a notch (3) is provided at the left end of the shell (1).

3. The PD door closer according to claim 1, characterized in that: The right end of the movable block (4) is fixedly connected to the left end of the spring (2) through the right end of the notch (3).

4. The PD door closer according to claim 1, wherein: The top end of the connecting plate (5) is fixedly connected to the bottom end of the shell (1), and four threaded holes (6) are provided. The four threaded holes (6) are opened at the bottom end of the connecting plate (5).

5. The PD door closer according to claim 1, characterized in that: There are two threaded holes (7) provided, and the two threaded holes (7) are opened at the top of the shell (1).

6. The PD door closer according to claim 1, characterized in that: The bottom end of the fixing block (8) is fixedly connected to the top end of the shell (1), and the left end of the fixing plate (9) is fixedly connected to the right end of the shell (1).

7. The PD door closer according to claim 1, characterized in that: Two limit blocks (10) are provided, and the rear ends of the two limit blocks (10) are fixedly connected to the rear ends of the inner walls of the notch (3).

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