A speed control door closer

Abstract

The utility model relates to door closer technology field discloses a kind of speed-regulating door closers, including door seat, the inner wall of door seat is rotatably connected with pivot, the top of pivot is fixedly connected with rotating plate, the top of rotating plate is rotatably connected with oil cylinder, the inner wall of oil cylinder is slidably connected with piston, the rear side of piston is rotatably connected with wall seat, the top of oil cylinder is communicated with oil box, the inner wall of oil cylinder is fixedly connected with flow valve, the inner wall of flow valve is rotatably connected with valve core, the outer wall of valve core is equipped with semicircular hole, the top of valve core is fixedly connected with connecting shaft, the top of connecting shaft is fixedly connected with runner. In the utility model, connecting shaft connects runner and valve core, so that operator can rotate valve core by rotating runner, change semicircular hole and oil passage relative position, so that flow valve can control oil flow, to reach the effect of speed-regulating.

Description

Technical Field

[0001] This utility model relates to the field of door closer technology, and in particular to a speed-adjustable door closer. Background Technology

[0002] A door closer is a specialized device used to precisely control the closing action of a door. It is installed on the top or side of the door and has an ingenious structural design, consisting of a hydraulic system, a spring assembly, and a robust protective shell. During operation, the door closer generates elastic force through the storage and release of the spring, which serves as the driving force for closing the door. At the same time, the piston and damping orifice in the hydraulic system control the flow of oil, enabling the door to close smoothly and at a uniform speed.

[0003] A search revealed Chinese Patent Publication No. CN220184915U, which discloses a door closer and its usage method. The device includes a hydraulic cylinder with a hydraulic rod movably mounted inside. A first mounting base is rotatably mounted on the hydraulic cylinder, and a second mounting base is rotatably mounted on the hydraulic rod. Fixed plates are fixedly mounted on both the first and second mounting bases. Pushing mechanisms are provided on both the first and second mounting bases, and movable plates are fixedly mounted on both pushing mechanisms. Polygonal conical heads are symmetrically arranged on both sides of the hydraulic cylinder and hydraulic rod. Round rods are rotatably mounted on the two fixed plates and two movable plates. Polygonal conical grooves are formed on the four round rods, with the polygonal conical heads and grooves fitting together. Four mounting plates are fixedly mounted on both the first and second mounting bases, and screw holes are provided on the mounting plates. The two pushing mechanisms include two adjusting grooves. However, due to the different opening and closing speeds of doors in different scenarios, the flow rate of the hydraulic oil in the hydraulic cylinder cannot be controlled, resulting in the door closer's opening and closing speed being unadjustable. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a speed-regulating door closer, which aims to improve the problem in the prior art where the flow of hydraulic oil in the hydraulic cylinder cannot be controlled, resulting in the inability to adjust the opening and closing speed of the door closer.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a speed-regulating door closer, comprising a door seat, a rotating shaft rotatably connected to the inner wall of the door seat, a rotating plate fixedly connected to the top of the rotating shaft, a hydraulic cylinder rotatably connected to the top of the rotating plate, a piston slidably connected to the inner wall of the hydraulic cylinder, a wall seat rotatably connected to the rear side of the piston, an oil box communicating with the top of the hydraulic cylinder, a flow valve fixedly connected to the inner wall of the hydraulic cylinder, a valve core rotatably connected to the inner wall of the flow valve, a semi-circular hole opened on the outer wall of the valve core, a connecting shaft fixedly connected to the top of the valve core, a rotating wheel fixedly connected to the top of the connecting shaft, a wheel housing fixedly connected to the top of the oil box, a limiting rotating block fixedly connected to the top of the inner wall of the wheel housing, a semi-circular rotating groove opened on the top of the rotating wheel, and a reset mechanism provided inside the door seat.

[0006] Through the above technical solution: the hydraulic cylinder rotates on the top of the door seat, while the piston rotates on the inner wall of the wall seat. The door seat and the wall seat are connected by a sliding connection between the hydraulic cylinder and the piston, thus constructing a complete speed-regulating door closer structure system. The rotational connection between the door seat and the rotating shaft provides the basis for the rotation when the door opens and closes. The rotating plate connects the rotating shaft and the hydraulic cylinder, allowing the hydraulic cylinder to adapt to different angles as the door moves. The piston slides inside the hydraulic cylinder in conjunction with the oil box to supply oil, providing power for closing the door. The flow valve and valve core adjust the oil flow through a semi-circular hole to achieve speed regulation. The connecting shaft and the rotating wheel facilitate the operation of the valve core. The wheel housing and the rotation limit block cooperate to prevent excessive rotation and ensure the stable operation of the door closer.

[0007] As a further description of the above technical solution:

[0008] The reset mechanism includes a toothed ring, the inner wall of which is fixedly connected to the middle of the outer wall of the rotating shaft. A toothed plate is meshed with the outer wall of the toothed ring. End plates are fixedly connected to the left and right ends of the toothed plate. Smooth plates are fixedly connected to adjacent sides of the outer walls of the two end plates. Springs are fixedly connected to the left and right sides of the inner wall of the door seat. Push plates are fixedly connected to adjacent sides of the outer walls of the two springs.

[0009] The above technical solution works as follows: when the door is opened, the toothed ring rotates with the shaft, causing the toothed plate to move horizontally. The spring is compressed and stores elastic potential energy. When the door is closed, the spring releases energy to push the push plate, which drives the toothed plate to drive the toothed ring to rotate in the opposite direction, causing the shaft to reverse and drive the door to close, thus achieving automatic reset. The end plate stabilizes the toothed plate, and the smooth plate reduces friction, ensuring a smooth and stable reset process.

[0010] As a further description of the above technical solution:

[0011] A slider is fixedly connected to the middle of the outer wall of the valve core, and a groove is opened in the middle of the inner wall of the flow valve.

[0012] Through the above technical solution: during the process of adjusting the oil flow rate by rotating the valve core, the slider slides in the groove, which plays a role in guiding and stabilizing the rotation of the valve core, ensuring the accuracy and stability of the flow rate adjustment, and making the speed regulation function of the door closer more reliable.

[0013] As a further description of the above technical solution:

[0014] A wall mounting plate is fixedly connected to the rear side of the outer wall of the wall base, and a door mounting plate is fixedly connected to the rear side of the outer wall of the door base.

[0015] The above technical solutions provide a stable installation foundation for the entire door closer, ensuring that all components work together in the correct positions. The wall-mounted plate facilitates the secure installation of the wall base on the wall, while the door-mounted plate allows the door base to be securely installed on the door surface.

[0016] As a further description of the above technical solution:

[0017] The inner wall of the door mounting plate is slidably connected with multiple positioning pins, and the outer wall of the oil box is provided with a scale.

[0018] Through the above technical solution: the positioning pin can slide on the door mounting plate to accurately position the door seat installation position and improve installation accuracy; the scale on the outer wall of the oil box allows users to intuitively understand the oil level information inside the oil box, making it easy to keep track of the oil status and ensure the normal operation of the hydraulic system.

[0019] As a further description of the above technical solution:

[0020] A fixing seat is fixedly connected to the bottom of the outer wall of the oil box, and a cylinder seat is fixedly connected to the front side of the outer wall of the oil cylinder.

[0021] The above technical solution involves fixing the oil box with a fixed base to prevent it from shaking and ensuring a stable oil supply. The cylinder seat provides an additional support point for the cylinder, enhancing its stability and enabling the cylinder to perform its function more reliably during operation.

[0022] As a further description of the above technical solution:

[0023] Two rotating rings are fixedly connected to the front side of the outer wall of the cylinder seat, and rubber pads are slidably connected to adjacent sides of the outer walls of the two rotating rings.

[0024] The above technical solution allows the hydraulic cylinder to rotate more flexibly during operation, adapting to different door opening angles. The rubber pad provides cushioning and protection, extends the service life of components, and improves the quietness of the door closer's operation.

[0025] As a further description of the above technical solution:

[0026] A padding ring is fixedly connected to the top front side of the rotating plate, and the outer wall of the rotating wheel is treated with anti-slip material.

[0027] Through the above technical solutions: the height of the rotating plate can be adjusted by the shim ring, the cooperation between the rotating plate and other components is optimized, the adaptability of the entire door closer structure is improved, and the anti-slip treatment of the outer wall of the rotating wheel increases the friction when the operator rotates the rotating wheel, making the operation more convenient and safe, and facilitating precise adjustment of the valve core to achieve speed regulation.

[0028] This utility model has the following beneficial effects:

[0029] 1. In this utility model, the rotating wheel and the valve core are connected by a connecting shaft, so that the operator can rotate the valve core by rotating the rotating wheel, changing the relative position of the semi-circular hole and the oil passage, so that the flow valve can control the oil flow and thus achieve the effect of speed regulation. At the same time, the rotation limit block inside the wheel housing cooperates with the semi-circular groove on the top of the rotating wheel to limit the rotation range of the rotating wheel, so that the door closer will not be damaged due to excessive rotation, ensuring its stable operation and normal function of speed regulation.

[0030] 2. In this utility model, the outer wall of the toothed ring meshes with the toothed plate, so that the rotation of the toothed ring can be converted into the translational motion of the toothed plate. At the same time, the connection between the spring and the inner wall of the door seat and the push plate allows the left spring to be compressed due to the movement of the toothed plate when the door is opened, storing elastic potential energy and providing a power source for the door to reset. Attached Figure Description

[0031] Figure 1 This is a perspective view of a speed-regulating door closer proposed in this utility model;

[0032] Figure 2 This is a front view of a speed-regulating door closer proposed in this utility model;

[0033] Figure 3 This is a partial structural exploded view of a speed-regulating door closer proposed in this utility model;

[0034] Figure 4 This is a cross-sectional view of the door seat of a speed-regulating door closer proposed in this utility model;

[0035] Figure 5 This is a schematic diagram of the reset mechanism of a speed-regulating door closer proposed in this utility model.

[0036] Legend:

[0037] 1. Door seat; 2. Reset mechanism; 201. Gear ring; 202. Gear plate; 203. End piece; 204. Smooth plate; 205. Spring; 206. Push plate; 3. Rotating shaft; 4. Rotating plate; 5. Hydraulic cylinder; 6. Piston; 7. Wall seat; 8. Oil box; 9. Flow valve; 10. Valve core; 11. Semicircular hole; 12. Connecting shaft; 13. Rotating wheel; 14. Wheel housing; 15. Rotation limit block; 16. Semicircular rotating groove; 17. Sliding block; 18. Sliding groove; 19. Wall mounting plate; 20. Door mounting plate; 21. Positioning pin; 22. Scale; 23. Fixed seat; 24. Cylinder seat; 25. Rotating ring; 26. Rubber pad; 27. Balancing ring. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. 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.

[0039] See attached document Figure 1 Appendix Figure 2 and attached Figure 3 This utility model provides an embodiment of a speed-regulating door closer, including a door seat 1. The door seat 1 serves as a basic support structure for installation on the door body, providing installation positions and support for other components. A rotating shaft 3 is rotatably connected to the inner wall of the door seat 1. The rotating shaft 3 can flexibly rotate within the inner wall of the door seat 1, realizing the rotational connection function when the door is opened and closed. A rotating plate 4 is fixedly connected to the top of the rotating shaft 3. The rotating plate 4 can rotate with the rotating shaft 3 to drive the movement of other components connected to it. A hydraulic cylinder 5 is rotatably connected to the top of the rotating plate 4. The hydraulic cylinder 5, through its rotatable connection with the rotating plate 4, can adapt to different door movement. At the same opening angle, a piston 6 is slidably connected to the inner wall of the hydraulic cylinder 5. The piston 6 slides within the hydraulic cylinder 5, cooperating with the hydraulic cylinder 5 to achieve hydraulic control functions. A wall seat 7 is rotatably connected to the rear side of the piston 6. The wall seat 7 is fixed to the wall, providing support and a rotation connection point for the piston 6. An oil box 8 is connected to the top of the hydraulic cylinder 5. The oil box 8 is used to replenish the hydraulic fluid for the entire hydraulic system, ensuring the normal operation of the hydraulic system. A flow valve 9 is fixedly connected to the inner wall of the hydraulic cylinder 5. The flow valve 9 is used to control the flow rate. A valve core 10 is rotatably connected to the inner wall of the flow valve 9. The valve core 10 can rotate within the inner wall of the flow valve 9. The valve core 10 adjusts its own position to regulate the oil flow rate. A semi-circular hole 11 is provided on the outer wall of the valve core 10, which mates with the oil passage inside the flow valve 9. By changing the relative position, the flow rate of oil through the flow valve 9 is adjusted. A slider 17 is fixedly connected to the middle of the outer wall of the valve core 10, which guides and stabilizes the valve core 10 during rotation. A groove 18 is provided in the middle of the inner wall of the flow valve 9, which mates with the slider 17 to guide the valve core 10 to rotate smoothly. A connecting shaft 12 is fixedly connected to the top of the valve core 10, which transmits the rotational power of the rotating wheel 13 to the valve core 10. 0. A rotating wheel 13 is fixedly connected to the top of the connecting shaft 12. The rotating wheel 13 provides the operator with an operating interface for adjusting the valve core 10. A wheel housing 14 is fixedly connected to the top of the oil box 8. The wheel housing 14 is used to protect the rotating wheel 13 and related components. A limiting block 15 is fixedly connected to the top of the inner wall of the wheel housing 14. The limiting block 15 is used to limit the rotation range of the rotating wheel 13 to prevent excessive rotation from damaging the door closer. A semi-circular groove 16 is opened on the top of the rotating wheel 13. The semi-circular groove 16 cooperates with the limiting block 15 to limit the rotation range of the rotating wheel 13. A reset mechanism 2 is provided inside the door seat 1.

[0040] Specifically, when the door opens, the door seat 1 is fixed to the door body as a basic support. The rotating shaft 3 rotates on the inner wall of the door seat 1, driving the top rotating plate 4 to rotate, which in turn causes the hydraulic cylinder 5, which is rotatably connected to the rotating plate 4, to move to adapt to different opening angles of the door. At this time, the piston 6 is in an initial slidable position on the inner wall of the hydraulic cylinder 5. The wall seat 7, which is rotatably connected to its rear side, is fixed to the wall. When the door closes, under the weight of the door itself and the closing force, the movement of the door is transmitted to the rotating plate 4 via the rotating shaft 3, driving the hydraulic cylinder 5 to rotate around the connection point with the wall seat 7, causing the piston 6 to slide inside the hydraulic cylinder 5. The top of the hydraulic cylinder 5 is connected to the oil box 8, which replenishes the hydraulic system with oil. The flow valve 9, fixed on the inner wall of the hydraulic cylinder 5, plays a key speed regulating role. The valve core 10, which is rotatably connected to the wall, has a semi-circular hole 11 on its outer wall. The piston 6 slides to make the oil flow in the oil cylinder 5. Rotating the valve core 10 can change the relative position of the semi-circular hole 11 and the oil passage in the flow valve 9, thereby adjusting the oil flow rate. When rotating, the slider 17 slides with the valve core 10 in the slide groove 18. The rotating wheel 13 at the top of the connecting shaft 12 of the valve core 10 is the operation interface. Rotating the rotating wheel 13 drives the valve core 10 to rotate. The wheel housing 14 is fixed to the top of the oil box 8. The rotation limit block 15 on the top of its inner wall cooperates with the semi-circular rotating groove 16 on the top of the rotating wheel 13 to limit the rotation range of the rotating wheel 13 and prevent excessive rotation from damaging the door closer. When the rotation limit block 15 slides to the extreme positions at both ends of the semi-circular rotating groove 16, it stops the rotating wheel 13 from continuing to rotate.

[0041] See attached document Figure 4 and attached Figure 5 The reset mechanism 2 includes a gear ring 201, the inner wall of which is fixedly connected to the middle of the outer wall of the rotating shaft 3 for synchronous rotation with the rotating shaft 3 and transmission of the rotational power of the rotating shaft 3. A gear plate 202 is meshed with the outer wall of the gear ring 201, converting the rotation of the gear ring 201 into the translational motion of the gear plate 202 through meshing. End plates 203 are fixedly connected to both ends of the gear plate 202, serving to stabilize the structure of the gear plate 202 and connect other components. The two end plates 203... A smooth plate 204 is fixedly connected to each adjacent side of the outer wall. The smooth plate 204 is used to reduce the friction between the toothed plate 202 and the surrounding parts when the toothed plate 202 moves, so as to ensure the smoothness of the movement. Springs 205 are fixedly connected to the left and right sides of the inner wall of the door seat 1. The springs 205 serve as the reset power source and store and release elastic potential energy during the opening and closing of the door. Push plates 206 are fixedly connected to each adjacent side of the outer wall of the two springs 205. Push plates 206 are used to transmit the force of the springs 205 and drive the toothed plate 202 to move.

[0042] Specifically, when the door is opened, the door seat 1 installed on the door body moves with the door, causing the rotating shaft 3, which is rotatably connected to the inner wall of the door seat 1, to rotate. Since the inner wall of the toothed ring 201 is fixed in the middle of the outer wall of the rotating shaft 3, the toothed ring 201 rotates synchronously. The outer wall of the toothed ring 201 meshes with the toothed plate 202, causing the toothed plate 202 to translate. The end pieces 203 at the left and right ends of the toothed plate 202 move accordingly. The smooth plate 204 fixed on the adjacent side of the end piece 203 reduces the friction of the toothed plate 202. The spring 205 on the left side of the inner wall of the door seat 1 is compressed due to the movement of the toothed plate 202. It is indirectly connected to the toothed plate 202 through the push plate 206 and stores elastic potential energy. When the door is closed, the left spring 205 releases elastic potential energy, pushing the push plate 206 to move. The right spring 205 is compressed, and the push plate 206 drives the toothed plate 202 to move, driving the toothed ring 201 to rotate in the opposite direction, causing the rotating shaft 3, which is fixed with the toothed ring 201, to rotate in the opposite direction, thus closing the door and completing the reset.

[0043] See attached document Figure 1 Appendix Figure 2 and attached Figure 3 A wall mounting plate 19 is fixedly connected to the rear side of the outer wall of the wall base 7. The wall mounting plate 19 is used to securely install the wall base 7 on the wall, providing wall-mounted support for the entire door closer. A door mounting plate 20 is fixedly connected to the rear side of the outer wall of the door base 1. The door mounting plate 20 is used to securely install the door base 1 on the door, realizing the connection between the door closer and the door. Multiple positioning pins 21 are slidably connected to the inner wall of the door mounting plate 20. The positioning pins 21 slide on the door mounting plate 20 to accurately position the installation position of the door base 1, ensuring accurate installation. A scale 22 is provided on the outer wall of the oil box 8. The scale 22 allows users to intuitively understand the relevant scale information of the oil in the oil box 8 and assists in judging the oil status. A fixing seat 23 is fixedly connected to the bottom of the outer wall of the oil box 8. The fixing seat 23 is used to fix the oil box 8 and ensure the oil box 8 is in the correct position. To ensure stability and prevent wobbling, a cylinder seat 24 is fixedly connected to the front side of the outer wall of the hydraulic cylinder 5. The cylinder seat 24 provides additional support and fixing points for the hydraulic cylinder 5, enhancing its stability. Two rotating rings 25 are fixedly connected to the front side of the outer wall of the cylinder seat 24. The rotating rings 25 allow the hydraulic cylinder 5 to rotate more flexibly during movement, adapting to different door opening angles. Rubber pads 26 are slidably connected to adjacent sides of the outer walls of the two rotating rings 25. The rubber pads 26 can reduce friction and collision noise between the rotating rings 25, playing a buffering and protective role. A heightening ring 27 is fixedly connected to the top front side of the rotating plate 4. The heightening ring 27 can adjust the height of the rotating plate 4, optimizing the cooperation between the rotating plate 4 and other components. The outer wall of the rotating wheel 13 is treated with anti-slip treatment, which increases the friction between the rotating wheel 13 and the operator's hand, making the operation of the rotating wheel 13 more convenient and safer.

[0044] Specifically, the wall mounting plate 19 and the door mounting plate 20 respectively ensure the stable installation of the wall base 7 and the door base 1 on the wall and door, respectively, building a stable support system for the door closer. The positioning pin 21 helps the door base 1 to be installed accurately, ensuring the accuracy of the coordinated work of each component. The scale 22 on the outer wall of the oil box 8 and the fixing seat 23 at the bottom make it convenient for users to monitor the oil level and ensure the stability of the oil box 8, so that the hydraulic system can operate normally. The cylinder base 24 and the rotating ring 25 at its front end provide support for the cylinder 5 while giving it the ability to rotate flexibly to adapt to different door opening angles. The rubber pads 26 between the rotating rings 25 reduce friction and noise and extend the service life of the components. The shim ring 27 fixes the rotating plate 4 at a suitable height, while the anti-slip treatment of the rotating wheel 13 improves the convenience and safety of operation.

[0045] Working principle: When the door is open, all components are in their respective initial positions. Door seat 1, as the basic support structure of the entire device, is firmly installed on the door. The rotating shaft 3 can rotate flexibly on the inner wall of door seat 1. The rotating plate 4, fixedly connected to its top, rotates as the door opens, thereby driving the rotating cylinder 5 connected to it. The rotating connection between cylinder 5 and rotating plate 4 allows cylinder 5 to adapt to different door opening angles. At this time, piston 6 is in a sliding initial position on the inner wall of cylinder 5, while the wall seat 7 rotatably connected to the rear of piston 6... Fixed to the wall, when the door needs to be closed, driven by its own weight and the closing force, the door begins to move in the closing direction. This movement is transmitted to the rotating plate 4 through the rotating shaft 3. The rotating plate 4 drives the hydraulic cylinder 5 to rotate around the connection point with the wall base 7. During the rotation of the hydraulic cylinder 5, because the piston 6 is rotatably connected to the wall base 7, the piston 6 will begin to slide inside the hydraulic cylinder 5. The top of the hydraulic cylinder 5 is connected to the oil box 8, which provides oil replenishment for the entire hydraulic system. The flow valve 9, which is fixedly connected to the inner wall of the hydraulic cylinder 5, plays a key role in the speed regulation process. The inner wall of the flow valve 9 rotates... The valve core 10 is movably connected to the piston 6 in the cylinder 5. A semi-circular hole 11 is provided on the outer wall of the valve core 10. When the piston 6 slides within the cylinder 5, the oil flows within the cylinder 5. The flow valve 9 controls the flow rate of the oil. By rotating the valve core 10, the relative position of the semi-circular hole 11 and the oil passage within the flow valve 9 can be changed. During the rotation of the valve core 10, the slider 17 engages in the groove 18 and slides with the rotation of the valve core 10, thereby adjusting the flow rate of the oil through the flow valve 9. A connecting shaft 12 is fixedly connected to the top of the valve core 10, and a rotating wheel is fixedly connected to the top of the connecting shaft 12. 13 provides an operating interface for regulating valve core 10. The operator can drive valve core 10 to rotate by rotating wheel 13. Wheel housing 14 is fixed to the top of oil box 8. The rotation limiting block 15 fixedly connected to the top of its inner wall cooperates with the semi-circular groove 16 opened on the top of wheel 13. The rotation limiting block 15 restricts the rotation range of wheel 13 to prevent excessive rotation from damaging the door closer. When the wheel 13 is rotated, the rotation limiting block 15 slides in the semi-circular groove 16. When it reaches the extreme positions at both ends of the semi-circular groove 16, the rotation limiting block 15 will prevent the wheel 13 from continuing to rotate.

[0046] Furthermore, when the door is opened, the door seat 1 installed on the door body moves with the door, and the rotating shaft 3, which is rotatably connected to the inner wall of the door seat 1, rotates accordingly. Since the inner wall of the toothed ring 201 is fixed in the middle of the outer wall of the rotating shaft 3, the toothed ring 201 also rotates synchronously with the rotating shaft 3. The outer wall of the toothed ring 201 meshes with the toothed plate 202. The rotation of the toothed ring 201 drives the toothed plate 202 to translate. The end plates 203 at the left and right ends of the toothed plate 202 move with the toothed plate 202. The smooth plate 204 fixed on the adjacent side of the end plate 203 can reduce the friction when the toothed plate 202 moves, making the movement smoother. The spring 205 is always in a compressed state. When the door is opened, the spring 205 on the left side of the inner wall of the door seat 1 is compressed due to the toothed plate 202. As the door moves and is compressed, spring 205 is indirectly connected to toothed plate 202 via push plate 206, storing elastic potential energy in the process. When the door needs to be closed, spring 205, which previously stored elastic potential energy, begins to release energy. Spring 205 on the left releases its elasticity, pushing push plate 206 connected to it to move in the direction of door closing. Spring 205 on the right is compressed, and push plate 206 drives toothed plate 202 to move. Since toothed plate 202 meshes with toothed ring 201, the movement of toothed plate 202 drives toothed ring 201 to rotate in the opposite direction. Since toothed ring 201 is fixed on rotating shaft 3, rotating shaft 3 also rotates in the opposite direction, thereby driving the door to move in the closing direction, completing a reset operation.

[0047] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. 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 speed-regulating door closer, comprising a door seat (1), characterized in that: The inner wall of the door seat (1) is rotatably connected to a rotating shaft (3), the top of the rotating shaft (3) is fixedly connected to a rotating plate (4), the top of the rotating plate (4) is rotatably connected to a hydraulic cylinder (5), the inner wall of the hydraulic cylinder (5) is slidably connected to a piston (6), the rear side of the piston (6) is rotatably connected to a wall seat (7), the top of the hydraulic cylinder (5) is connected to an oil box (8), the inner wall of the hydraulic cylinder (5) is fixedly connected to a flow valve (9), and the inner wall of the flow valve (9) is rotatably connected to a valve core ( ). 10), the outer wall of the valve core (10) is provided with a semi-circular hole (11), the top of the valve core (10) is fixedly connected to a connecting shaft (12), the top of the connecting shaft (12) is fixedly connected to a rotating wheel (13), the top of the oil box (8) is fixedly connected to a wheel housing (14), the top of the inner wall of the wheel housing (14) is fixedly connected to a limited rotating block (15), the top of the rotating wheel (13) is provided with a semi-circular rotating groove (16), and the door seat (1) is provided with a reset mechanism (2).

2. The speed-regulating door closer according to claim 1, characterized in that: The reset mechanism (2) includes a toothed ring (201), the inner wall of which is fixedly connected to the middle of the outer wall of the rotating shaft (3). The outer wall of the toothed ring (201) is meshed with a toothed plate (202). The left and right ends of the toothed plate (202) are fixedly connected with end pieces (203). The outer walls of the two end pieces (203) are fixedly connected with smooth plates (204) on adjacent sides. The inner walls of the door seat (1) are fixedly connected with springs (205) on both the left and right sides. The outer walls of the two springs (205) are fixedly connected with push plates (206) on adjacent sides.

3. The speed-regulating door closer according to claim 1, characterized in that: A slider (17) is fixedly connected to the middle of the outer wall of the valve core (10), and a groove (18) is provided in the middle of the inner wall of the flow valve (9).

4. A speed-regulating door closer according to claim 1, characterized in that: A wall mounting plate (19) is fixedly connected to the rear side of the outer wall of the wall base (7), and a door mounting plate (20) is fixedly connected to the rear side of the outer wall of the door base (1).

5. A speed-regulating door closer according to claim 4, characterized in that: The inner wall of the door mounting plate (20) is slidably connected with multiple positioning pins (21), and the outer wall of the oil box (8) is provided with a scale (22).

6. A speed-regulating door closer according to claim 1, characterized in that: A fixing seat (23) is fixedly connected to the bottom of the outer wall of the oil box (8), and a cylinder seat (24) is fixedly connected to the front side of the outer wall of the oil cylinder (5).

7. A speed-regulating door closer according to claim 6, characterized in that: Two rotating rings (25) are fixedly connected to the front side of the outer wall of the cylinder seat (24), and rubber pads (26) are slidably connected to adjacent sides of the outer walls of the two rotating rings (25).

8. A speed-regulating door closer according to claim 1, characterized in that: A padding ring (27) is fixedly connected to the top front side of the rotating plate (4), and the outer wall of the rotating wheel (13) is treated with anti-slip treatment.

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