A door closer with a lock delay function

Abstract

The utility model provides a kind of to realize 20°-0° door closing angle under the operation speed and door hitting force of door are separately controlled, to meet the scene use of wind pressure, indoor and outdoor air pressure imbalance etc., a kind of with lock delay function's door closer.In the utility model, piston divides into left cavity and right cavity, oil circuit pipeline, BV regulating valve, locking valve, locking oil discharge pipeline and adjusting oil discharge pipeline are arranged in door closer body, oil groove is arranged on the piston, when door closer body is at 20°-7°, adjusting oil discharge pipeline is at oil groove position, hydraulic oil in left cavity flows from oil circuit pipeline and is discharged to right cavity by adjusting oil discharge pipeline, when door closer body is at 7°-0°, adjusting oil discharge pipeline and locking oil discharge pipeline are simultaneously at oil groove position, hydraulic oil in left cavity flows from oil circuit pipeline and is discharged to right cavity by adjusting oil discharge pipeline and locking oil discharge pipeline.The utility model is suitable for door closer technical field.

Description

Technical Field

[0001] This utility model relates to the field of door closer technology, and in particular to a door closer with a locking delay function. Background Technology

[0002] A door closer is a hydraulic device similar to a spring on the door frame. It achieves a buffering effect by throttling the fluid in the door closer, ensuring that the door can automatically, accurately, and promptly close to its initial position after being opened. Currently, most hydraulic door closers on the market only have two valves: a closing speed valve and a slamming valve, which control the end speed when the door is closing. In this case, the speed can only be adjusted once when the door is closed to a specific angle range. It is not possible to control the door's running speed and slamming force within that angle range. In cases of wind pressure or air pressure imbalance, the door may fail to close and lock, and in extreme cases, this may pose a safety hazard. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a door closer with a locking delay function that can separately control the door running speed and door impact force at a closing angle of 20°-0°, thereby meeting the needs of scenarios with wind pressure and imbalance of indoor and outdoor air pressure.

[0004] The technical solution adopted by this utility model is as follows: This utility model includes a door closer body, in which an inner cavity is provided. A piston is connected to the left side of the inner cavity via a return spring. The piston divides the inner cavity into a left cavity and a right cavity. The door closer body also includes an oil passage, a BV regulating valve, a locking valve, a locking drain pipe, and a regulating drain pipe. One end of the BV regulating valve is connected to the right cavity via the regulating drain pipe, and the other end is connected to the left cavity via the oil passage. One end of the locking valve is connected to the right cavity via the locking drain pipe, and the other end is connected to the right cavity via the locking drain pipe. The oil passages are interconnected, and an oil groove is provided on the piston ring. When the door closer body is at 20°-7°, the piston blocks the oil drain pipe of the locking valve, and the regulating oil drain pipe is in the oil groove position. The hydraulic oil in the left cavity flows in from the oil passage and is discharged to the right cavity through the regulating oil drain pipe. When the door closer body is at 7°-0°, the regulating oil drain pipe and the locking oil drain pipe are simultaneously in the oil groove position. The hydraulic oil in the left cavity flows in from the oil passage and is discharged to the right cavity through the regulating oil drain pipe and the locking oil drain pipe.

[0005] Furthermore, the oil circuit includes a hydraulic oil inflow pipe and a guide pipe. The hydraulic oil inflow pipe is positioned to coincide with the locking valve. The locking valve and the BV regulating valve are interconnected through the guide pipe.

[0006] Furthermore, a movable valve is also provided in the right cavity. The movable valve is connected to the right side of the cavity via a second return spring, and the movable valve is connected to the piston via a cam drive shaft.

[0007] Furthermore, the piston is provided with a first roller, the movable valve is provided with a second roller, and the cam drive shaft includes a drive shaft and a heart-shaped cam sleeved on the drive shaft. The tip of the heart-shaped cam is connected to the first roller, and the concave end of the heart-shaped cam is connected to the second roller. The axle position of the first roller is higher than that of the second roller.

[0008] Furthermore, a closing speed valve and a closing delay valve, which are interconnected and communicate with the inner cavity, are also provided at the lower left side of the door closer body.

[0009] Finally, a movable regulating valve that communicates with the right cavity is also provided at the upper right side of the door closer body.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model adds the BV regulating valve to the oil circuit pipeline, which, together with the locking valve and the oil groove set on the piston, forms a completely new regulating oil circuit in the inner cavity. Ultimately, it achieves control of two operating speeds within the 0°-20° closing angle range through the mutual adjustment of the BV regulating valve and the locking valve; that is, when the door closer body is at 20°-7°, the piston blocks the oil discharge pipeline of the locking valve, and the regulating oil discharge pipeline is in the position of the oil groove. By adjusting the BV regulating valve, the flow rate of the hydraulic oil is controlled, thereby controlling the flow rate within this range. The closing speed within the designated area is reduced, effectively regulating the closing effect under conditions of unbalanced indoor and outdoor air pressure and wind pressure. When the door closer body is between 7° and 0°, the regulating oil drain pipe and the locking oil drain pipe are simultaneously in the oil tank position. At this time, the flow rate of hydraulic oil can be controlled by adjusting the BV regulating valve and the locking valve, thereby accelerating the closing speed within this range. Because the regulating oil drain pipe and the locking oil drain pipe discharge oil simultaneously within this range, the hydraulic oil flow rate increases, putting the door in an accelerated state and achieving an accelerated door-slamming and locking effect, ensuring quiet and safe locking of the door. Therefore, this utility model can achieve separate control of the door's operating speed and slamming force within a closing angle of 20°-0°, thus meeting the needs of various scenarios with wind pressure and unbalanced indoor and outdoor air pressure. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0012] Figure 2 This is a schematic diagram of the internal structure of this utility model;

[0013] Figure 3 yes Figure 1 Schematic diagram of the cross-sectional structure of AA;

[0014] Figure 4 yes Figure 1 Schematic diagram of the cross-sectional structure of BB. Detailed Implementation

[0015] like Figures 1 to 4 As shown, this utility model includes a door closer body 1, within which an inner cavity 2 is provided. A piston 4 is connected to the left side of the inner cavity 2 via a return spring 3. The piston 4 divides the inner cavity 2 into a left cavity 21 and a right cavity 22. The door closer body 1 also includes an oil passage pipe 5, a BV regulating valve 6, a locking valve 7, a locking drain pipe 8, and a regulating drain pipe 9. One end of the BV regulating valve 6 is connected to the right cavity 22 via the regulating drain pipe 9, and the other end is connected to the left cavity 21 via the oil passage pipe 5. One end of the locking valve 7 is connected to the right cavity 22 via the locking drain pipe 8, and the other end is connected to the oil passage pipe 5. The valve body 1 is connected to the piston 4, and an oil groove 10 is provided around the piston 4. When the valve body 1 is at 20°-7°, the piston 4 blocks the oil drain pipe of the locking valve 7, and the regulating oil drain pipe 9 is in the position of the oil groove 10. The hydraulic oil in the left cavity 21 flows in from the oil passage pipe 5 and is discharged to the right cavity 22 through the regulating oil drain pipe 9. When the valve body 1 is at 7°-0°, the regulating oil drain pipe 9 and the locking oil drain pipe 8 are simultaneously in the position of the oil groove 10, and the hydraulic oil in the left cavity 21 flows in from the oil passage pipe 5 and is discharged to the right cavity 22 through the regulating oil drain pipe 9 and the locking oil drain pipe 8.

[0016] This invention adds a BV regulating valve 6 to the oil pipeline 5, which, together with the locking valve 7 and the oil groove 10 set on the piston 4, forms a new regulating oil circuit in the inner cavity 2. When the door closer body 1 is at 20°-7°, the piston 4 blocks the oil drain pipe 8 of the locking valve, and the regulating oil drain pipe 9 is in the position of the oil groove 10. At this time, the left cavity 21 → the oil pipeline 5 → the BV regulating valve 6 → the regulating oil drain pipe 9 → the right cavity 22 form a passage. By adjusting the BV regulating valve 6, the flow rate of hydraulic oil is controlled, thereby controlling the closing speed in this range, so that the closing speed is reduced. After the reduction, the closing effect can be effectively adjusted for the imbalance of indoor and outdoor air pressure and the closing effect under wind pressure. When the door closer body 1 is at 20°-7°, the piston 4 blocks the oil drain pipe 8 of the locking valve, and the regulating oil drain pipe 9 is in the position of the oil groove 10. When the temperature is between 7° and 0°, the regulating drain pipe 9 and the locking drain pipe 8 are simultaneously located in the oil tank 10. At this time, the left cavity 21 → the oil pipe 5 → the BV regulating valve 6 → the regulating drain pipe 9 → the right cavity 22 form a passage. At the same time, the left cavity 21 → the oil pipe 5 → the locking valve 7 → the locking drain pipe 8 → the right cavity 22 also form a passage. By adjusting the BV regulating valve 6 and the locking valve 7, the flow rate of hydraulic oil in the dual passages is controlled, thereby accelerating the closing speed within this range. Since the regulating drain pipe and the locking drain pipe discharge oil simultaneously within this range, the hydraulic oil flow rate increases, causing the door to be in an accelerated state, achieving the effect of accelerating the door to lock, ensuring that the door is locked quietly and safely.

[0017] In this invention, the oil circuit 5 includes a hydraulic oil inflow pipe 51 and a guide pipe 52. The hydraulic oil inflow pipe 51 is positioned concurrently with the locking valve 7, and the locking valve 7 and the BV regulating valve 6 are interconnected via the guide pipe 52. Therefore, when the door closer body 1 is in the 20°-7° range, and the left cavity 21 discharges hydraulic oil into the right cavity 22 through the hydraulic oil inflow pipe 51 and the regulating drain pipe 9, the BV regulating valve 6 and the locking valve 7 are simultaneously in the flow path. Therefore, in addition to adjusting the hydraulic oil flow rate in this range via the BV regulating valve 6, the flow rate can also be fine-tuned via the locking valve 7, achieving stepless adjustment of the closing speed within this range and improving the user experience and overall quality of the product.

[0018] In this invention, a movable valve 11 is also provided inside the right cavity 22. The movable valve 11 is connected to the right side of the inner cavity 2 via a second return spring 12. The movable valve 11 is connected to the piston 4 via a cam drive shaft 13. A first roller 41 is provided on the piston 4, and a second roller 111 is provided on the movable valve 11. The cam drive shaft 13 includes a drive shaft 131 and a heart-shaped cam 132 sleeved on the drive shaft 131. The tip of the heart-shaped cam 132 is connected to the first roller 41, and the concave end of the heart-shaped cam 132 is connected to the second roller 111. The axle position of the first roller 41 is higher than that of the second roller 111. This invention uses a heart-shaped camshaft to replace the traditional ordinary cam drive technology, and through the height difference design between the first roller 41 and the second roller 111, achieves the effect of low opening force and high closing force, meeting the needs of barrier-free and easy door opening scenarios.

[0019] In this utility model, a closing speed valve 14 and a closing delay valve 15 are also provided at the lower left side of the door closer body 1, which are interconnected and connected to the inner cavity 2.

[0020] In this utility model, a movable valve regulating valve 16 connected to the right cavity 22 is also provided at the upper right side position of the door closer body 1.

[0021] Finally, it should be emphasized that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A door closer with a locking delay function, comprising a door closer body (1), wherein an inner cavity (2) is provided inside the door closer body (1), and a piston (4) is connected to the left side of the inner cavity (2) via a return spring (3), the piston (4) dividing the inner cavity (2) into a left cavity (21) and a right cavity (22), characterized in that: The door closer body (1) is also equipped with an oil passage pipe (5), a BV regulating valve (6), a locking valve (7), a locking drain pipe (8), and a regulating drain pipe (9). One end of the BV regulating valve (6) is connected to the right cavity (22) through the regulating drain pipe (9), and the other end is connected to the left cavity (21) through the oil passage pipe (5). One end of the locking valve (7) is connected to the right cavity (22) through the locking drain pipe (8), and the other end is connected to the oil passage pipe (5). An oil groove (10) is provided around the piston (4). When the door closer body (1) is at 20°-7°, The piston (4) blocks the oil drain pipe of the locking valve (7), the regulating oil drain pipe (9) is in the position of the oil tank (10), the hydraulic oil in the left cavity (21) flows in from the oil circuit pipe (5) and is discharged to the right cavity (22) through the regulating oil drain pipe (9). When the door closer body (1) is at 7°-0°, the regulating oil drain pipe (9) and the locking oil drain pipe (8) are simultaneously in the position of the oil tank (10), the hydraulic oil in the left cavity (21) flows in from the oil circuit pipe (5) and is discharged to the right cavity (22) through the regulating oil drain pipe (9) and the locking oil drain pipe (8).

2. A door closer with a locking delay function according to claim 1, characterized in that: The oil pipeline (5) includes a hydraulic oil inflow pipeline (51) and a guide pipeline (52). The hydraulic oil inflow pipeline (51) is located at the same position as the locking valve (7). The locking valve (7) and the BV regulating valve (6) are interconnected through the guide pipeline (52).

3. A door closer with a locking delay function according to claim 2, characterized in that: The right cavity (22) is also provided with a movable valve (11). The movable valve (11) is connected to the right side of the inner cavity (2) through a second return spring (12). The movable valve (11) is connected to the piston (4) through a cam drive shaft (13).

4. A door closer with a locking delay function according to claim 3, characterized in that: The piston (4) is provided with a first roller (41), the movable valve (11) is provided with a second roller (111), the cam drive shaft (13) includes a drive shaft (131) and a heart-shaped cam (132) sleeved on the drive shaft (131). The tip of the heart-shaped cam (132) is connected to the first roller (41), and the concave end of the heart-shaped cam (132) is connected to the second roller (111). The axle position of the first roller (41) is higher than the axle position of the second roller (111).

5. A door closer with a locking delay function according to claim 4, characterized in that: A closing speed valve (14) and a closing delay valve (15) are also provided at the lower left side of the door closer body (1), which are interconnected and connected to the inner cavity (2).

6. A door closer with a locking delay function according to claim 5, characterized in that: The upper right side of the door closer body (1) is also provided with a movable valve regulating valve (16) that communicates with the right cavity (22).

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