Torque-adjustable door closer for opening and closing door by external force

Abstract

The utility model relates to the technical field of door closers, in particular to a moment-adjustable external force door closer which comprises a door closer main body, an adjusting component is arranged in the door closer main body, a cover body is arranged on the door closer main body, an external force application mechanism is mounted on the door closer main body below the cover body, and the external force application mechanism is connected with the door closer main body. The externally-hung stress application mechanism comprises a cam, the cam and the adjusting assembly are installed in a linkage mode, and an inner compression spring and an outer compression spring are installed on one side of the cam. The door closer has the advantages that independent stress application adjustment can be carried out on a door leaf within a certain angle range, and the overall door opening and closing moment can be flexibly adjusted, and the problem that door closers in the existing market cannot meet the requirement that the door leaf needs to be closed with strong force when closed at a certain angle in specific occasions such as fire prevention and wind prevention; and after a certain angle is opened, the force needs to be reduced so as to easily open.

Description

Technical Field

[0001] This utility model relates to the field of door closer technology, specifically a door closer with adjustable torque and external force for opening and closing. Background Technology

[0002] Door closers are widely used in everyday scenarios as an important device to ensure automatic door closing. Currently, conventional door closers on the market can only achieve ordinary door opening and closing actions. Some door closers with torque adjustment functions can change the closing force, but they cannot adjust the force for the door leaf in the critical range of 0-5 degrees.

[0003] However, in situations where stringent requirements exist for door closure performance, such as fire prevention and wind resistance, the door needs to have a greater closing force when closed at a certain angle to ensure safety and protection. When the door is opened beyond a certain angle, the force needs to be reduced so that users can easily open the door.

[0004] At this point, existing technologies have obvious shortcomings in meeting the practical application requirements and cannot meet the differentiated requirements for the closing force of the door at different angles in specific scenarios. Therefore, an adjustable torque external force door opener and closer is proposed to solve the above problems. Utility Model Content

[0005] The purpose of this utility model is to provide a door closer with adjustable torque and external force, which has the advantages of independently adjusting the force of the door leaf within a certain angle range and flexibly adjusting the overall opening and closing torque. It solves the problem that existing door closers on the market cannot meet the requirements of strong closing force when the door leaf is closed at a certain angle and easy opening force when the door leaf is opened at a certain angle in specific occasions such as fire prevention and wind prevention.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a door closer with adjustable torque and external force, comprising a door closer body, an adjustment component inside the door closer body, a cover on the door closer body, and an external force-applying mechanism installed on the door closer body below the cover. The external force-applying mechanism includes a cam, which is linked to the adjustment component. An inner compression spring and an outer compression spring are installed on one side of the cam.

[0007] Preferably, the adjusting assembly includes a gear and a gear shaft installed inside the gear. The bottom of the gear shaft passes through the door closer body, the fixed part of the gear shaft passes through the door closer body and is connected to the cam, and a damping rod is provided inside the door closer body outside the gear.

[0008] In the design, the gear and gear shaft structure of the adjusting component enables efficient power transmission. The bottom of the gear shaft passes through the door closer body and the top connects to the cam, allowing the adjusting component to drive the external force-adding mechanism. Simultaneously, the damping rod inside the door closer body outside the gear provides buffering and damping adjustment during the closing process, preventing damage caused by excessive closing speed and improving the stability and service life of the door closer.

[0009] Preferably, the bottom of the cover is provided with an internal thread groove that matches the external compression spring, and an adjusting screw for positioning the internal compression spring and the external compression spring is installed at the internal thread groove on the cover.

[0010] In its design, the internal threaded groove on the bottom of the cover, in conjunction with the adjusting screw, enables precise positioning and convenient adjustment of the internal and external compression springs. Users can easily change the spring compression level by rotating the adjusting screw, thereby flexibly adjusting the torque of the door closer to meet the closing force requirements of different scenarios. The operation is simple and efficient.

[0011] Preferably, the cam is provided with a gear shaft connector, the bottom of which is connected to the adjustment component via a gear shaft, and the top of which is connected to the cover via a bearing.

[0012] In the design, the gear shaft connector inside the cam ensures a reliable connection between the cam and the adjustment component, guaranteeing stable power transmission. The top of the gear shaft connector is connected to the cover via a bearing, reducing friction during rotation, making the cam rotate more smoothly, reducing energy loss, and improving the overall working efficiency of the door closer.

[0013] Preferably, the inner compression spring is fitted inside the outer compression spring, and a connecting body is installed at the end of the inner compression spring away from the adjusting screw. The connecting body is used to limit the position of the inner compression spring inside the outer compression spring.

[0014] In the design, the inner compression spring is fitted inside the outer compression spring, and the position of the inner compression spring is limited by the connecting piece, thus achieving the coordinated operation of the dual-spring structure. This design increases the elastic potential energy reserve of the spring system.

[0015] Preferably, the connector body is fitted with a first boss and a second boss, and a large roller is clamped on the opposite side of the first boss and the second boss. The first boss and the second boss are assembled by connecting shaft with a first small roller and a second small roller.

[0016] In the design, the first and second protrusions inserted into the connector body, along with the assembly of the first small roller, the second small roller, and the large roller via the connecting shaft, achieve complex yet efficient force transmission and conversion. Under the pressure of the cam, the large roller drives the first and second small rollers to move along a specific trajectory, converting the cam's rotation into the compression and extension of the spring. This precisely controls the magnitude of the external force applied by the door closer, meeting the differentiated requirements for the closing force at different door angles in specific scenarios.

[0017] Preferably, the large roller makes dynamic contact with the groove on the cam through an inner compression spring and an outer compression spring.

[0018] In the design, the large roller dynamically contacts the groove on the cam through internal and external compression springs, enabling real-time adjustment of the torque during operation. When the door opens and closes, the large roller rolls within the cam groove, and the spring compresses or extends according to changes in the cam profile, continuously providing appropriate external force for the closing process. This ensures that the door closes with the preset force at different angles, greatly improving the applicability and safety of the door closer in special scenarios such as fire prevention and windproofing.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0020] This invention achieves the effect of converting the action of opening the door into the rotation of the cam by setting the linkage between the adjustment component and the cam.

[0021] During the rotation of the cam, the inner and outer compression springs are compressed, storing energy for closing the door and enabling independent force adjustment of the door leaf within a certain angle range. When the door is closed, the springs release energy, providing additional power for closing, especially in fireproof and windproof applications, meeting the requirement for a strong closing force when the door leaf is closed at a certain angle.

[0022] This utility model achieves the effect of conveniently adjusting the compression degree of the inner and outer compression springs by setting the bottom of the cover to cooperate with the adjusting screw;

[0023] Rotating the adjusting screw clockwise or counterclockwise changes the spring's compression state, thus flexibly adjusting the overall door opening and closing torque. After the door is opened to a certain angle, adjusting the spring compression reduces the closing torque, allowing users to easily open the door. This solves the problem that existing door closers on the market cannot meet the varying closing force requirements of different door angles in specific situations.

[0024] This invention achieves the effect of two springs working together by setting an inner compression spring sleeve inside the outer compression spring;

[0025] The two springs can function separately or simultaneously depending on the actual situation, depending on the required closing force. This further enhances the door closer's ability to adjust the closing force of the door at different angles, greatly improving its applicability and safety in special scenarios. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0027] Figure 2 This is a front view structural diagram of the present utility model;

[0028] Figure 3 This is a schematic diagram of the exploded structure of this utility model;

[0029] Figure 4 This is a schematic diagram of the exploded structure of the external force-adding mechanism of this utility model.

[0030] In the diagram: 1. Door closer body; 11. Adjustment component; 2. Cover; 3. External force-applying mechanism; 301. Cam; 302. Gear shaft connector; 303. Bearing; 304. First small roller; 305. First boss; 306. Large roller; 307. Second boss; 308. Connecting shaft; 309. Second small roller; 310. Connector body; 311. Inner compression spring; 312. Outer compression spring; 313. Adjusting screw. Detailed Implementation

[0031] 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.

[0032] Example 1

[0033] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, one embodiment of this utility model is provided: a door closer with adjustable torque and external force, including a door closer body 1, an adjustment component 11 inside the door closer body 1, a cover 2 on the door closer body 1, and an external force-applying mechanism 3 installed on the door closer body 1 below the cover 2. The external force-applying mechanism 3 includes a cam 301, which is linked to the adjustment component 11. An inner compression spring 311 and an outer compression spring 312 are installed on one side of the cam 301.

[0034] Specifically, by setting the linkage between the adjustment component 11 and the cam 301, the action of opening the door is converted into the rotation of the cam 301.

[0035] During rotation, the cam 301 compresses the inner compression spring 311 and the outer compression spring 312, storing energy for closing the door and enabling independent force adjustment of the door leaf within a certain angle range. When the door is closed, the spring releases energy, providing additional power for closing, especially in fireproof and windproof applications, meeting the requirement for a strong closing force when the door leaf is closed at a certain angle.

[0036] By setting the bottom of the cover 2 to cooperate with the adjusting screw 313, the compression degree of the inner compression spring 311 and the outer compression spring 312 can be easily adjusted.

[0037] Rotating the adjusting screw 313 clockwise or counterclockwise changes the compression state of the spring, thereby flexibly adjusting the overall door opening and closing torque. After the door is opened to a certain angle, adjusting the spring compression reduces the closing torque, allowing users to easily open the door. This solves the problem that existing door closers on the market cannot meet the varying closing force requirements of different door angles in specific situations.

[0038] By setting an inner compression spring 311 and fitting it inside the outer compression spring 312, the effect of two springs working together is achieved.

[0039] The two springs can function separately or simultaneously depending on the actual situation, depending on the required closing force. This further enhances the door closer's ability to adjust the closing force of the door at different angles, greatly improving its applicability and safety in special scenarios.

[0040] Example 2

[0041] In order to achieve efficient power transmission and to buffer and dampen the door closing process, such as Figure 1 , Figure 2 and Figure 3 As shown, in this embodiment, the adjustment component 11 includes a gear and a gear shaft installed inside the gear. The bottom of the gear shaft passes through the door closer body 1, and the fixed part of the gear shaft passes through the door closer body 1 and is connected to the cam 301. A damping rod is provided inside the door closer body 1 outside the gear.

[0042] Specifically, the gear and gear shaft structure of the adjusting component 11 enables efficient power transmission. The bottom of the gear shaft passes through the door closer body 1, and the top connects to the cam 301, allowing the adjusting component 11 to drive the external force-adding mechanism 3. Simultaneously, the damping rod inside the door closer body 1 outside the gear provides buffering and damping adjustment during the closing process, preventing damage caused by excessive closing speed and improving the stability and service life of the door closer.

[0043] Furthermore, the bottom of the cover 2 is provided with an internal threaded groove that matches the external compression spring 312, and an adjusting screw 313 for positioning the internal compression spring 311 and the external compression spring 312 is installed in the internal threaded groove on the cover 2.

[0044] Specifically, the internal threaded groove at the bottom of the cover 2, in conjunction with the adjusting screw 313, enables precise positioning and convenient adjustment of the internal compression spring 311 and the external compression spring 312. Users can easily change the spring compression level by rotating the adjusting screw 313, thereby flexibly adjusting the torque of the door closer to meet the closing force requirements of different scenarios. The operation is simple and efficient.

[0045] Furthermore, the cam 301 is provided with a gear shaft connector 302. The bottom of the gear shaft connector 302 is connected to the adjustment assembly 11 via a gear shaft, and the top of the gear shaft connector 302 is connected to the cover 2 via a bearing 303.

[0046] Specifically, the gear shaft connector 302 inside the cam 301 ensures a reliable connection between the cam 301 and the adjusting component 11, guaranteeing stable power transmission. The top of the gear shaft connector 302 is connected to the cover 2 via a bearing 303, reducing friction during rotation, making the cam 301 rotate more smoothly, reducing energy loss, and improving the overall working efficiency of the door closer.

[0047] Example 3

[0048] To achieve the coordinated operation of the dual-spring structure and precise control of the external force applied by the door closer, such as Figure 3 and Figure 4 As shown, in this embodiment, the inner compression spring 311 is fitted inside the outer compression spring 312. A connecting body 310 is installed at one end of the inner compression spring 311 away from the adjusting screw 313. The connecting body 310 is used to limit the position of the inner compression spring 311 inside the outer compression spring 312.

[0049] Specifically, the inner compression spring 311 is fitted inside the outer compression spring 312, and the position of the inner compression spring 311 is limited by the connecting body 310, realizing the coordinated operation of the dual spring structure. This design increases the elastic potential energy reserve of the spring system.

[0050] Furthermore, a first boss 305 and a second boss 307 are inserted into the connector body 310. The first boss 305 and the second boss 307 clamp a large roller 306 on opposite sides. The first boss 305 and the second boss 307 are assembled by connecting shaft 308 with first small roller 304 and second small roller 309.

[0051] Specifically, the first boss 305 and the second boss 307 inserted into the connector body 310, along with the assembly of the first small roller 304, the second small roller 309, and the large roller 306 via the connecting shaft 308, achieve complex yet efficient force transmission and conversion. Under the pressure of the cam 301, the large roller 306 drives the first small roller 304 and the second small roller 309 to move along a specific trajectory, converting the rotation of the cam 301 into the compression and extension of the spring. This precisely controls the magnitude of the external force applied by the door closer, meeting the differentiated requirements for the closing force at different angles of the door in specific scenarios.

[0052] Furthermore, the large roller 306 makes dynamic contact with the groove on the cam 301 through the inner compression spring 311 and the outer compression spring 312.

[0053] Specifically, the large roller 306 dynamically contacts the groove on the cam 301 through the inner compression spring 311 and the outer compression spring 312, enabling real-time adjustment of the torque during operation of the door closer. When the door opens and closes, the large roller 306 rolls within the groove of the cam 301, and the spring compresses or extends according to the changes in the profile of the cam 301, continuously providing appropriate external force for the closing process. This ensures that the door can close with the preset force at different angles, greatly improving the applicability and safety of the door closer in special scenarios such as fire prevention and windproofing.

[0054] When using this utility model, prepare the door closer body 1 and ensure that its internal adjustment component 11 is fully installed; prepare the cover 2, the bottom of which is provided with an internal thread groove that matches the external compression spring 312; and prepare the various components of the external force-adding mechanism 3.

[0055] Insert the gear shaft connector 302 into the cam 301 so that the bottom of the gear shaft connector 302 is connected to the gear shaft of the adjusting assembly 11; install the bearing 303 on the top of the gear shaft connector 302 in preparation for subsequent connection with the cover 2.

[0056] The inner compression spring 311 is fitted inside the outer compression spring 312. A connecting body 310 is provided at the end of the inner compression spring 311 that is away from the adjusting screw 313 to limit the position of the inner compression spring 311 inside the outer compression spring 312.

[0057] The first boss 305 and the second boss 307 are inserted into the connector body 310. The first boss 305 and the second boss 307 are clamped by the connecting shaft 308 on the opposite side of the connecting shaft 308, and the first boss 305 and the second boss 307 are assembled by the connecting shaft 308, the first small roller 304 and the second small roller 309.

[0058] The assembled external force-adding mechanism 3 is installed on the door closer body 1, and the external force-adding mechanism 3 is linked with the adjustment component 11 through the cam 301.

[0059] Install the cover 2 onto the door closer body 1, aligning the internal threaded groove at the bottom of the cover 2 with the external compression spring 312. Install the adjusting screw 313 into the internal threaded groove on the cover 2 for positioning and subsequent adjustment of the internal compression spring 311 and the external compression spring 312. At this time, the large roller 306 forms dynamic contact with the groove on the cam 301 through the internal compression spring 311 and the external compression spring 312.

[0060] During debugging, rotating the gear shaft of the adjustment component 11 drives the gear shaft connector 302 and the cam 301 to rotate. The cam 301 squeezes the large roller 306, causing the first small roller 304 and the second small roller 309 to move along a specific trajectory, and compressing the inner compression spring 311 and the outer compression spring 312 to generate kinetic energy storage.

[0061] According to actual needs, the compression degree of the inner compression spring 311 and the outer compression spring 312 can be adjusted by rotating the adjusting screw 313, thereby adjusting the torque of the door closer. Rotating the adjusting screw 313 clockwise increases the spring compression degree and increases the door closer torque; rotating the adjusting screw 313 counterclockwise decreases the spring compression degree and decreases the door closer torque.

[0062] When in use, the door opens, causing the adjustment component 11 to move and compress the spring to store kinetic energy; when the door closes, the spring releases the kinetic energy, providing the power to close the door, thus realizing the function of opening and closing the door with adjustable torque and external force.

[0063] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A torque-adjustable, externally applied force door closer, comprising a door closer body (1), wherein an adjustment component (11) is provided inside the door closer body (1), a cover (2) is provided on the door closer body (1), and an external force-applying mechanism (3) is installed on the door closer body (1) below the cover (2), characterized in that: The external force-adding mechanism (3) includes a cam (301), which is linked to the adjustment component (11). An inner compression spring (311) and an outer compression spring (312) are installed on one side of the cam (301).

2. The adjustable torque external force door closer according to claim 1, characterized in that, The adjustment assembly (11) includes a gear and a gear shaft installed inside the gear. The bottom of the gear shaft passes through the door closer body (1), and the fixed part of the gear shaft passes through the door closer body (1) and is connected to the cam (301). A damping rod is provided inside the door closer body (1) outside the gear.

3. The adjustable torque external force door closer according to claim 1, characterized in that, The bottom of the cover (2) is provided with an internal thread groove that matches the external compression spring (312), and an adjusting screw (313) for positioning the internal compression spring (311) and the external compression spring (312) is installed at the internal thread groove on the cover (2).

4. The adjustable torque external force door closer according to claim 1, characterized in that, The cam (301) is provided with a gear shaft connector (302). The bottom of the gear shaft connector (302) is connected to the adjustment component (11) through the gear shaft, and the top of the gear shaft connector (302) is connected to the cover (2) through the bearing (303).

5. A torque-adjustable external force door closer according to claim 1, characterized in that, The inner compression spring (311) is fitted inside the outer compression spring (312). A connector body (310) is installed at one end of the inner compression spring (311) away from the adjusting screw (313). The connector body (310) is used to limit the position of the inner compression spring (311) inside the outer compression spring (312).

6. A torque-adjustable external force door closer according to claim 5, characterized in that, The connector body (310) is fitted with a first boss (305) and a second boss (307). The first boss (305) and the second boss (307) clamp a large roller (306) on opposite sides. The first boss (305) and the second boss (307) are assembled by connecting shaft (308) in conjunction with a first small roller (304) and a second small roller (309).

7. A torque-adjustable external force door closer according to claim 6, characterized in that, The large roller (306) makes dynamic contact with the groove on the cam (301) through the inner compression spring (311) and the outer compression spring (312).

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