A slow closing door closer

Abstract

The utility model relates to door closer technology field discloses a kind of slow shock door closers, including shell, the inner wall sliding connection of shell has plug rod, the top of shell is rotatably connected with swivel ring, the inner wall fixed connection of swivel ring has shell, the outer wall fixed connection of swivel ring has slide bar, the outer wall sliding connection of slide bar has rod buckle, the inner wall of shell is equipped with two sliding grooves, the outer wall top of plug rod is fixedly connected with two sliding blocks, the bottom of plug rod is fixedly connected with piston, the bottom fixed connection of piston has connecting rod, the bottom fixed connection of connecting rod has connecting piece. In the utility model, door panel opens, slide bar drives plug rod to move down, connecting piece further stretches slow shock spring fixed in the bottom of shell, so that it stores elastic potential energy, when door panel closes, slow shock spring releases elastic potential energy, generates the elastic force upwards, slows down the speed of door panel closing, reaches slow shock effect.

Description

Technical Field

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

[0002] Door closers, as an important hardware component in modern buildings, are used in various doors and windows to achieve automatic closing, thereby improving the safety and convenience of buildings. Their core function is to achieve automatic closing of doors and windows. Through complex mechanical structures and rigorous mechanical principles, a highly efficient and stable automatic control system is constructed. When the door or window is opened, the internal components of the door closer work together to stably and accurately control the closing of the door or window.

[0003] A search revealed Chinese patent publication number CN217129249U, which discloses a door closer and its usage method. The device includes a micro motor, a movable support, and a transmission device. The micro motor is fixed to the movable support and connected to the transmission device. The main shaft is fixed to the movable support. A bearing is also fitted and fixed on the main shaft, which is connected to a first connecting rod via the bearing. A moving mechanism is provided to drive the main shaft to move, thereby adjusting the position of the bearing. Because the main shaft is connected to the first connecting rod via the bearing, further adjustment of the first connecting rod allows it to extend or retract on the side wall of the door closer, thus adapting to the actual needs of different door bodies and frames in terms of position, size, distance, etc. However, this device relies on a motor-driven gear and rack meshing transmission and lacks a shock-absorbing structure, which can lead to excessive force when closing the door, resulting in severe impact and noise. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a shock-absorbing door closer, which aims to improve the problem of the lack of shock-absorbing structure in the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a shock-absorbing door closer, comprising a housing, a stopper rod slidably connected to the inner wall of the housing, a rotating ring rotatably connected to the top of the housing, a rotating shell fixedly connected to the inner wall of the rotating ring, a sliding rod fixedly connected to the outer wall of the rotating ring, a rod buckle slidably connected to the outer wall of the sliding rod, two sliding grooves formed on the inner wall of the rotating shell, two sliders fixedly connected to the top of the outer wall of the stopper rod, a piston fixedly connected to the bottom end of the stopper rod, a connecting rod fixedly connected to the bottom of the piston, a connecting piece fixedly connected to the bottom end of the connecting rod, a shock-absorbing spring fixedly connected to the bottom of the housing, and a positioning mechanism provided inside the rod buckle.

[0006] The above technical solution achieves effective conversion and control of the door panel opening and closing actions. The outer shell provides structural support and installation space for internal components. The piston rod, rotating ring, rotating shell, sliding rod, and rod buckle work together to convert the translational motion of the door panel into rotational and linear motion, laying the foundation for power transmission and conversion. The sliding groove and slider work together to realize the conversion of motion mode. The piston, connecting rod, connecting plate, and damping spring work together to stretch the damping spring to store energy when the door panel is opened and release energy when it is closed, achieving the damping effect.

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

[0008] The positioning mechanism includes two positioning ramps, the bottoms of which are fixedly connected to the bottom of the inner wall of the slide rod. A partition is fixedly connected to the inner wall of the rod buckle. A rotating shaft is slidably connected to the inner wall of the partition. A roller is rotatably connected to the right side of the outer wall of the rotating shaft. A force-bearing block is fixedly connected to the left side of the outer wall of the rotating shaft. A pressure spring is fixedly connected to the top of the force-bearing block. A threaded push block is slidably connected to the top of the pressure spring. A screwing block is fixedly connected to the top of the threaded push block.

[0009] The above technical solution achieves the positioning of the door panel. The special slope design of the positioning ramp, combined with the different directional forces generated by the rolling of the roller, causes the rotating shaft to drive the force block to move, compressing or rebounding the pressure spring. Users can adjust the position of the threaded push block by rotating the screw block to change the initial compression degree of the pressure spring, thereby adapting to the positioning needs of door panels of different weights and enhancing the applicability of the product.

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

[0011] A mounting plate is fixedly connected to the rear side of the outer wall of the housing, and the outer wall of the mounting plate has multiple screw holes.

[0012] The above technical solution provides a stable installation method for the shock-absorbing door closer. The mounting plate is used to connect the door closer to the wall or other mounting surfaces, and the screw holes facilitate the installation with screws, ensuring that the door closer is firmly installed and can work normally.

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

[0014] The inner walls of the multiple screw holes are threaded with screws, and the outer walls of the multiple screws are provided with hexagonal grooves.

[0015] The above technical solution achieves a secure installation by fitting screws with screw holes, and the hexagonal groove facilitates tightening operations using a hex wrench, making installation and disassembly more convenient and improving installation efficiency.

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

[0017] Two sealing rings are fixedly connected to the inner wall of the outer casing, and an anti-detachment plate is fixedly connected to the front side of the outer wall of the slide rod.

[0018] The above technical solutions improve the reliability and stability of the product. The sealing ring prevents external impurities from entering the housing, protecting the internal precision components and extending their service life. The anti-detachment plate prevents the slide bar from accidentally detaching from the mating component during sliding, ensuring the normal operation of the mechanical structure.

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

[0020] A limiting piece is fixedly connected to the top of the rotating ring, and a wall is fixedly connected to the rear side of the mounting plate.

[0021] The above technical solution achieves the limitation of the rotation angle of the rotating ring and provides a stable installation foundation for the door closer. The limiting plate prevents the rotating ring from rotating excessively and causing damage to the components, ensuring the normal function of the door closer. The mounting plate is connected to the wall, so that the door closer is installed firmly and can work reliably in various usage environments.

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

[0023] A door panel is fixedly connected to the right side of the outer wall of the rod buckle, and the outer wall of the screw block is treated with anti-slip treatment.

[0024] The above technical solution completes the connection between the door panel and the door closer, and optimizes the user's operating experience. The lever connects to the door panel, enabling the door panel to open and close automatically under the action of the door closer. The anti-slip treatment on the outer wall of the screw block increases the friction with the user's hand, making it easier for the user to rotate the screw block to adjust the positioning mechanism, making the operation more convenient and labor-saving.

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

[0026] Multiple hinges are fixedly connected to the rear side of the outer wall of the door panel, and a door handle is fixedly connected to the outer wall of the door panel.

[0027] The above technical solutions enable the door panel to have normal opening and closing functions and provide users with operating components. The hinges allow the door panel to rotate flexibly around the axis to realize normal opening and closing actions. The door handle provides users with a part to hold and apply force, making it convenient for users to open and close the door panel and improving the user experience.

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

[0029] 1. In this utility model, when the door panel is opened, the sliding rod drives the stop rod to move down, and the connecting piece then stretches the damping spring fixed at the bottom of the outer shell, so that it stores elastic potential energy. When the door panel is closed, the damping spring releases elastic potential energy and generates an upward elastic force, which slows down the closing speed of the door panel, achieves the damping effect, and avoids violent impact and noise when the door panel is closed.

[0030] 2. In this utility model, the top of the pressure spring is slidably connected to the threaded push block, and the top of the threaded push block is connected to the screw block. This allows the user to adjust the initial compression of the pressure spring by rotating the screw block. The roller slides forward relative to the inner wall of the slide rod and contacts the different slopes of the front positioning slope during the opening of the door panel. This makes it difficult for the roller to slide under the pressure of the pressure spring and the obstruction of the positioning slope after the door panel is fully opened, thus accurately positioning the door panel in the fully open position. Attached Figure Description

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

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

[0033] Figure 3 This is a cross-sectional view of the housing of a shock-absorbing door closer according to the present invention;

[0034] Figure 4 This is a partial structural exploded view of a shock-absorbing door closer proposed in this utility model;

[0035] Figure 5 This is a schematic diagram of the positioning mechanism of a shock-absorbing door closer proposed in this utility model.

[0036] Legend:

[0037] 1. Outer shell; 2. Positioning mechanism; 201. Positioning slope; 202. Partition plate; 203. Rotating shaft; 204. Roller; 205. Force-bearing block; 206. Pressure spring; 207. Threaded push block; 208. Tightening block; 3. Plug rod; 4. Rotary ring; 5. Rotating shell; 6. Slide rod; 7. Rod buckle; 8. Slide groove; 9. Slider; 10. Piston; 11. Connecting rod; 12. Connecting piece; 13. Shock-absorbing spring; 14. Mounting plate; 15. Screw hole; 16. Screw; 17. Hexagonal groove; 18. Sealing ring; 19. Anti-detachment piece; 20. Limiting piece; 21. Wall; 22. Door panel; 23. Hinge; 24. Door handle. 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 3 and attached Figure 4 This utility model provides an embodiment of a shock-absorbing door closer, comprising a housing 1. The housing 1 serves as an integral load-bearing structure, providing installation and protection space for internal components. A stopper rod 3 is slidably connected to the inner wall of the housing 1. The stopper rod 3 transmits power through sliding on the inner wall of the housing 1, driving subsequent components. A rotating ring 4 is rotatably connected to the top of the housing 1. The rotating ring 4 provides a rotational pivot for a rotating shell 5 and a sliding rod 6 connected thereto, driving them to rotate synchronously. The rotating shell 5 is fixedly connected to the inner wall of the rotating ring 4. The rotating shell 5 rotates with the rotating ring 4, using its own inner wall structure to drive the stopper rod 3. A slide rod 6 is fixedly connected to the outer wall of the door closer 3. The slide rod 6 converts the rotation of the rotating ring 4 into linear motion and transmits it to the lever buckle 7. The lever buckle 7 is slidably connected to the outer wall of the slide rod 6. The lever buckle 7 receives the motion of the slide rod 6 and transmits it to the door panel 22 connected to it, realizing the coordinated operation of the door panel 22 and other components of the door closer. Two sliding grooves 8 are opened on the inner wall of the rotating shell 5. The sliding grooves 8 provide a motion track for the slider 9 at the top of the stopper rod 3, accurately converting the rotation of the rotating shell 5 into the up and down sliding of the stopper rod 3. Two sliders 9 are fixedly connected to the top of the outer wall of the stopper rod 3. The sliders 9 slide in the sliding grooves 8 to ensure the movement of the stopper rod 3. To ensure stability and accuracy, and to stably transmit power, a piston 10 is fixedly connected to the bottom end of the piston rod 3. The piston 10 moves within the outer casing 1 under the action of the piston rod 3, changing the pressure state inside the outer casing 1. A connecting rod 11 is fixedly connected to the bottom of the piston 10, transmitting the movement of the piston 10 to the connecting plate 12. The connecting plate 12 is fixedly connected to the bottom end of the connecting rod 11, and is connected to the damping spring 13, transmitting the elastic force of the damping spring 13 to drive the piston 10 and related components to move. A damping spring 13 is fixedly connected to the bottom of the outer casing 1, and the damping spring 13 is located on the door panel 2. During the opening and closing process of 2, energy is stored and released through elastic deformation to achieve the damping closing effect of door panel 22. A mounting plate 14 is fixedly connected to the rear side of the outer wall of the outer shell 1. The mounting plate 14 is used to securely install the entire door closer on the support surface. A wall 21 is fixedly connected to the rear side of the mounting plate 14. The wall 21 provides a stable installation base for the door closer, ensuring that the door closer can work normally. A door panel 22 is fixedly connected to the right side of the outer wall of the lever buckle 7. The lever buckle 7 drives the door panel 22 to move, so that the door panel 22 can be automatically closed under the action of the door closer. A positioning mechanism 2 is provided inside the lever buckle 7.

[0040] Specifically, when the door panel 22 is opened, the latch 7 moves with the door panel 22. Because the slide rod 6 is slidably connected to the latch 7, the slide rod 6 slides relative to the latch 7, causing the rotating ring 4 to rotate. The rotating ring 4 causes the rotating shell 5, which is fixed to it, to rotate synchronously. The groove 8 on the inner wall of the rotating shell 5 cooperates with the slider 9 at the top of the stopper rod 3. The rotation of the rotating shell 5 causes the slider 9 to move down along the track of the groove 8, thereby causing the stopper rod 3 to slide down. The piston 10 at the bottom of the stopper rod 3 moves down inside the outer shell 1. The connecting rod 11 connecting the piston 10 and the connecting piece 12 also moves down with the piston 10, causing the connecting piece 12 to move. The damping spring 13, which is fixed to the bottom of the outer shell 1 and connected to the connecting piece 12, generates an upward force when the door panel 22 is closed. This force causes the connecting piece 12 to move upward. The connecting piece 12 then drives the piston 10 to move upward via the connecting rod 11. The piston 10 then drives the stopper rod 3 to slide upward. The top slider 9 of the stopper rod 3 moves upward within the slide groove 8 of the rotating shell 5, causing the rotating shell 5 to rotate in the opposite direction. The rotating shell 5 then drives the rotating ring 4 to rotate in the opposite direction. The rotating ring 4 then drives the rod buckle 7 to move towards the outer shell 1 via the slide rod 6, thus achieving the slow closing of the door panel 22 and achieving the damping effect.

[0041] See attached document Figure 5 The positioning mechanism 2 includes two positioning ramps 201, the bottoms of which are fixedly connected to the bottom of the inner wall of the slide bar 6. The positioning ramps 201 provide a specific rolling path for the rollers 204 to achieve the positioning function of the door panel 22, providing a reliable foundation for the cooperation of subsequent components. A partition 202 is fixedly connected to the inner wall of the lever buckle 7. The partition 202 provides sliding support for the rotating shaft 203, ensuring that the rotating shaft 203 can slide smoothly on its inner wall. The rotating shaft 203 is slidably connected to the inner wall of the partition 202. The sliding of the rotating shaft 203 within the partition 202 can drive the rollers 204 and the force-bearing block 205 to move, realizing the transmission of force. The rollers 204 are rotatably connected to the right side of the outer wall of the rotating shaft 203. The rollers 204 sense the sliding by rolling on the positioning ramps 201. The relative position of rod 6 and rod buckle 7 changes. A force-receiving block 205 is fixedly connected to the left side of the outer wall of the rotating shaft 203. The force-receiving block 205 is used to receive the force transmitted by the roller 204 and transmit it to the pressure spring 206. The pressure spring 206 is fixedly connected to the top of the force-receiving block 205. The pressure spring 206 adjusts the pressure of the roller 204 on the positioning slope 201 by compression and rebound to adapt to different positioning requirements. A threaded push block 207 is slidably connected to the top of the pressure spring 206. The threaded push block 207 can change the initial compression of the pressure spring 206 by sliding. A screw block 208 is fixedly connected to the top of the threaded push block 207. The screw block 208 allows the user to manually adjust the position of the threaded push block 207, thereby changing the positioning effect of the positioning mechanism 2.

[0042] Specifically, when the slide bar 6 slides relative to the buckle 7, the positioning mechanism 2 starts to work. Two positioning slopes 201 are fixed to the bottom of the inner wall of the slide bar 6. The adjacent slopes are gentler, while the slopes further away are steeper. When the slide bar 6 moves, the roller 204 contacts the positioning slopes 201. Due to the difference in slope, the roller 204 generates forces in different directions on the rotating shaft 203 during its rolling process, causing the rotating shaft 203 to slide on the inner wall of the partition 202. A force-bearing block 205 is fixed to the outer left wall of the rotating shaft 203. A pressure spring 206 is connected to the top of the force-bearing block 205. The top of the pressure spring 206 is slidably connected to a threaded push block 207 at the top of the inner wall of the buckle 7. A screw block 208 is connected to the top of the threaded push block 207. When the door panel 22 is opened, the roller 204 slides forward on the inner wall of the slide bar 6, first contacting the front positioning slope 201. 1. When the door panel 22 is fully opened, it passes through a steeper slope. At this time, the roller 204 is located between the front side of the inner wall of the slide rod 6 and the front positioning slope 201. Under the pressure of the pressure spring 206 and the obstruction of the positioning slope 201, the roller 204 is difficult to slide, thus positioning the door panel 22 in the fully open position. When the door panel 22 is not fully open, under the action of the damping spring 13, the roller 204 moves back to the initial position. At this time, the roller 204 is on the rear side of the inner wall of the slide rod 6 and is blocked by the steep slope of the rear positioning slope 201, thus positioning the door panel 22 in the closed position. By rotating the screw block 208, the position of the threaded push block 207 can be adjusted, changing the initial compression degree of the pressure spring 206, thereby adjusting the pressing force of the roller 204 on the contact surface to adapt to the positioning requirements of door panels 22 of different weights.

[0043] See attached document Figure 1 Appendix Figure 2 and attached Figure 3The outer wall of the mounting plate 14 has multiple screw holes 15, which are used to engage with screws 16 to firmly fix the mounting plate 14 to the mounting surface, thus ensuring stable installation. The inner walls of the screw holes 15 are threaded with screws 16. After the screws 16 are screwed into the screw holes 15, the mounting plate 14 is tightly fitted to the mounting surface, ensuring the overall stability of the door closer installation. The outer walls of the screws 16 are each provided with hexagonal grooves 17, which facilitate tightening the screws 16 with a hex wrench, making installation and disassembly convenient. Two sealing rings 18 are fixedly connected to the inner wall of the outer casing 1. The sealing rings 18 protect the internal parts from contamination and extend their service life. An anti-detachment plate 19 is fixedly connected to the front side of the outer wall of the slide rod 6. The anti-detachment plate 19 prevents the slide rod 6 from slipping off its mating parts during sliding. The sliding rod 6 is disengaged from the component to ensure normal operation and maintain stable operation of the door closer. The top of the rotating ring 4 is fixedly connected to the limiting piece 20, which can limit the rotation angle range of the rotating ring 4, prevent the rotating ring 4 from rotating excessively and damaging related components, and ensure the normal function of the door closer. The outer wall of the screw block 208 is treated with anti-slip treatment, which increases the friction between the screw block 208 and the user's hand, making it more convenient and effortless to operate the screw block 208 and improving the ease of operation. Multiple hinges 23 are fixedly connected to the rear side of the outer wall of the door panel 22. The hinges 23 allow the door panel 22 to rotate flexibly around the axis to realize the normal opening and closing function of the door panel 22. The door handle 24 is fixedly connected to the outer wall of the door panel 22, which provides the user with a part to hold and apply force, making it convenient for the user to open and close the door panel 22.

[0044] Specifically, the screw holes 15 on the outer wall of the mounting plate 14 mate with the screws 16 to securely connect the mounting surface and ensure the overall stability of the door closer installation. The hexagonal grooves 17 on the outer wall of the screws 16 facilitate tightening with a hex wrench, making installation and disassembly easier. The sealing ring 18 on the inner wall of the outer shell 1 blocks dust and impurities, protecting internal parts and extending service life. The anti-detachment plate 19 on the front side of the slide rod 6 prevents the slide rod 6 from coming off and maintains stable operation. The limiting plate 20 on the top of the rotating ring 4 limits the rotation angle to prevent damage to components. The anti-slip treatment on the outer wall of the screw block 208 improves the ease of operation. The hinge 23 on the rear side of the door panel 22 enables flexible opening and closing. The door handle 24 provides a gripping point for the user, making it convenient to open and close the door. These components work closely together to ensure the normal operation of the shock-absorbing door closer from installation and fixation, internal protection, motion control to operation and use, bringing users a safe, convenient, and durable user experience.

[0045] Working principle: First, when the door panel 22 is opened, the latch 7 moves with the door panel 22. Since the slide rod 6 is slidably connected to the latch 7, the slide rod 6 slides relative to the latch 7, thereby driving the rotating ring 4 to rotate. When the rotating ring 4 rotates, the rotating shell 5 fixedly connected to it will also rotate synchronously. Two sliding grooves 8 are opened on the inner wall of the rotating shell 5, and two sliders 9 are fixedly connected to the top of the outer wall of the stopper rod 3. When the rotating shell 5 rotates, the sliders 9 will move downward along the track of the sliding grooves 8 under the action of the sliding grooves 8, thereby driving the stopper rod 3 to slide downward. The bottom end of the stopper rod 3 is fixedly connected to the piston 10. The piston 10 moves downward with the stopper rod 3 inside the outer shell 1. At the same time, the connecting rod 11 connects the piston 10 and the connecting piece 12. As the piston 10 moves downward, the connecting rod 11... 1 and connecting piece 12 also move. At this time, the damping spring 13 fixed at the bottom of the outer shell 1 is stretched. Because the bottom end of the damping spring 13 is fixedly connected to the connecting piece 12, when the door panel 22 needs to be closed, the damping spring 13 has elastic potential energy after being stretched, which will generate an upward elastic force, causing the connecting piece 12 to move upward. The connecting piece 12 drives the piston 10 to move upward through the connecting rod 11. The piston 10 then drives the stopper rod 3 to slide upward. The slider 9 at the top of the stopper rod 3 moves upward in the slide groove 8 of the rotating shell 5, thereby causing the rotating shell 5 to rotate in the opposite direction. The rotating shell 5 drives the rotating ring 4 to rotate in the opposite direction. The rotating ring 4 drives the rod buckle 7 to move towards the outer shell 1 through the slide rod 6, finally realizing the slow closing of the door panel 22 and achieving the damping effect.

[0046] Furthermore, when the slide rod 6 slides relative to the buckle 7, the positioning mechanism 2 begins to function. Two positioning slopes 201 are fixedly connected to the bottom of the inner wall of the slide rod 6. These two positioning slopes 201 have a special design: the slope on the adjacent side is gentler than the slope on the side furthest away. When the slide rod 6 moves, the roller 204 contacts the positioning slope 201. Due to the difference in slope of the positioning slope 201, the roller 204 will generate forces in different directions on the rotating shaft 203 during the rolling process. The rotating shaft 203 slides upward on the inner wall of the partition 202. A force-bearing block 205 is fixedly connected to the left side of the outer wall of the rotating shaft 203. A pressure spring 206 is connected to the top of the force-bearing block 205. The top of the pressure spring 206 is connected to a threaded push block 207 that is slidably connected to the top of the inner wall of the rod buckle 7. A screw block 208 is fixedly connected to the top of the threaded push block 207. When the door panel 22 is opened, the roller 204 slides forward relative to the inner wall of the slide rod 6. When the roller 204 moves forward along the front side... When the positioning ramp 201 rolls, it first contacts the side with a gentler slope. After the door panel 22 is fully opened, the roller 204 passes the side with a steeper slope of the front positioning ramp 201 and is positioned between the front side of the inner wall of the slide rod 6 and the front positioning ramp 201. Under the pressure of the pressure spring 206 and the obstruction of the positioning ramp 201, the roller 204 cannot slide without external force, thus positioning the door panel 22 in the fully open position. When the door panel 22 is not fully open, the roller 204 moves back to the initial position under the action of the damping spring 13. The same principle applies. The roller 204 is on the rear side of the inner wall of the slide rod 6 and is blocked by the steep slope of the rear positioning ramp 201, thus positioning the door panel 22 in the closed position. By rotating the screw block 208, the position of the threaded push block 207 can be adjusted, thereby changing the initial compression degree of the pressure spring 206, which also changes the pressing force of the bottom of the roller 204 on the contact surface, so as to adapt to the positioning requirements of door panels 22 of different weights.

[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 shock-absorbing door closer, comprising a housing (1), characterized in that: The inner wall of the outer shell (1) is slidably connected to a stop rod (3), the top of the outer shell (1) is rotatably connected to a rotating ring (4), the inner wall of the rotating ring (4) is fixedly connected to a rotating shell (5), the outer wall of the rotating ring (4) is fixedly connected to a sliding rod (6), the outer wall of the sliding rod (6) is slidably connected to a rod buckle (7), the inner wall of the rotating shell (5) has two sliding grooves (8), the top of the outer wall of the stop rod (3) is fixedly connected to two sliders (9), the bottom end of the stop rod (3) is fixedly connected to a piston (10), the bottom of the piston (10) is fixedly connected to a connecting rod (11), the bottom end of the connecting rod (11) is fixedly connected to a connecting piece (12), the bottom of the outer shell (1) is fixedly connected to a shock-absorbing spring (13), and the inside of the rod buckle (7) is provided with a positioning mechanism (2).

2. The shock-absorbing door closer according to claim 1, characterized in that: The positioning mechanism (2) includes two positioning ramps (201). The bottom of the two positioning ramps (201) is fixedly connected to the bottom of the inner wall of the slide rod (6). The inner wall of the rod buckle (7) is fixedly connected to a partition plate (202). The inner wall of the partition plate (202) is slidably connected to a rotating shaft (203). The right side of the outer wall of the rotating shaft (203) is rotatably connected to a roller (204). The left side of the outer wall of the rotating shaft (203) is fixedly connected to a force-bearing block (205). The top of the force-bearing block (205) is fixedly connected to a pressure spring (206). The top of the pressure spring (206) is slidably connected to a threaded push block (207). The top of the threaded push block (207) is fixedly connected to a screw block (208).

3. The shock-absorbing door closer according to claim 1, characterized in that: A mounting plate (14) is fixedly connected to the rear side of the outer wall of the outer shell (1), and the outer wall of the mounting plate (14) has multiple screw holes (15).

4. A shock-absorbing door closer according to claim 3, characterized in that: The inner walls of the plurality of screw holes (15) are threaded with screws (16), and the outer walls of the plurality of screws (16) are provided with hexagonal grooves (17).

5. A shock-absorbing door closer according to claim 1, characterized in that: Two sealing rings (18) are fixedly connected to the inner wall of the outer shell (1), and an anti-detachment piece (19) is fixedly connected to the front side of the outer wall of the slide rod (6).

6. A shock-absorbing door closer according to claim 3, characterized in that: The top of the rotating ring (4) is fixedly connected to a limiting piece (20), and the rear side of the mounting plate (14) is fixedly connected to a wall (21).

7. A shock-absorbing door closer according to claim 2, characterized in that: A door panel (22) is fixedly connected to the right side of the outer wall of the rod buckle (7), and the outer wall of the screw block (208) is treated with anti-slip treatment.

8. A shock-absorbing door closer according to claim 7, characterized in that: Multiple hinges (23) are fixedly connected to the rear side of the outer wall of the door panel (22), and a door handle (24) is fixedly connected to the outer wall of the door panel (22).

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