Heavy buffer door closer

Abstract

The utility model discloses a heavy buffering door closer which comprises a shell, a cavity, a rack and a hook part. A mounting groove is formed in the shell, and a top cover is arranged at the top of the shell; the cavity is formed in the shell and located on one side of the mounting groove, and a buffer is arranged in the cavity; the buffer has the advantages that the transmission gear set drives the rack and the drag hook to control the buffer to be opened and closed, the stable buffering effect can be provided in the door opening and closing process, when the door is closed, the door can be automatically, slowly and stably closed from 80 degrees, and large impact force generated when the door is rapidly closed is avoided; the maximum door opening angle of the product is limited to be 94 degrees, and the door can be freely stopped between 85 degrees and 94 degrees, so that the design can meet the use requirements of daily passage and the like; the whole transmission structure is more stable through the fact that a positioning pin connected in the shell penetrates through a plurality of driven gears, a positioning block of a driving gear is matched with a positioning part of the shell, the sliding connection effect of a tooth groove on a rack is achieved, and the like.

Description

Technical Field

[0001] This utility model relates to the field of door closer technology, specifically a heavy-duty buffer door closer. Background Technology

[0002] Currently, most soft-close mechanisms on louvered hinged doors utilize mechanical compression springs for energy storage and hydraulic cylinder damping. They achieve soft closing through a bypass throttling oil circuit, and their transmission devices are mostly rack and pinion mechanisms. When the door is pushed or pulled by an external force, the spring is compressed through the transmission rod, rack and pinion, and piston rod. When the external force disappears, the spring force is released, closing the door through the piston rod, rack and pinion, and transmission rod. As the door approaches closing, the synchronously moving piston closes the main return oil channel, and the hydraulic oil flows back through the bypass throttling channel, producing damped closing. Because mechanical compression springs are used as energy storage devices, limitations in metal materials and heat treatment processes make it difficult to maintain consistent product specifications.

[0003] In existing technologies, most doors cannot provide a stable buffer during opening and closing. When closing, the door cannot automatically and slowly close smoothly from a specific angle, which can easily generate a large impact force. This can not only damage the door, door frame, and surrounding objects, but also generate a lot of noise, affecting the user experience. Furthermore, there may be no reasonable limit on the opening angle, which can not meet the needs of daily passage, and can easily cause door collision damage or damage to the door closer's own structure due to an excessive opening angle, reducing safety and the lifespan of the door closer.

[0004] Therefore, we have introduced a heavy-duty buffer door closer. Utility Model Content

[0005] The purpose of this invention is to provide a heavy-duty buffer door closer to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a heavy-duty buffer door closer, comprising: a shell, a cavity, a rack and pinion, and a hook;

[0007] The housing has an internal mounting groove, which is integrally formed with the housing. The top of the housing has a top cover.

[0008] The cavity is formed inside the outer shell on one side of the mounting groove. The cavity and the outer shell are integrally formed. A buffer is provided inside the cavity.

[0009] The rack is disposed inside the housing and is located on one side of the buffer. The buffer is provided with a pull hook inside.

[0010] The hook is located on one side of the pull hook and is integrally formed with the pull hook. A protrusion is provided on one side of the rack and is integrally formed with the rack. The protrusion contacts the hook.

[0011] The housing contains a transmission gear set located in the mounting slot. The driving gear of the transmission gear set drives the driven gears A, B, C, D, E and the lower gear, which in turn moves the rack and hook to form a buffer.

[0012] Preferably, the transmission gear set includes a bearing connected inside the drive gear within the housing, the bearing being fixedly disposed with respect to the drive gear, the drive gear being connected to one side of the mounting groove, the driven gear A meshing with the surface of the drive gear, the driven gear B meshing with the surface of the driven gear A, the driven gear C meshing with the surface of the driven gear B, the driven gear D meshing with the surface of the driven gear C, an upper gear connected to the top of the driven gear D, the driven gear E meshing with the surface of the upper gear, and a lower gear connected to the bottom of the driven gear E, the lower gear meshing with a rack.

[0013] Preferably, the housing is internally connected with a positioning pin, which passes through driven gear A, driven gear B, driven gear C, driven gear D and driven gear E. The positioning pin facilitates the rotation of driven gear A, driven gear B, driven gear C, driven gear D and driven gear E, and the rotation is smoother.

[0014] Preferably, positioning blocks are connected to both sides of the surface of the drive gear, and the positioning blocks and the drive gear are integrally formed. The housing is provided with a positioning part for fixing the positioning blocks, and the positioning part is integrally formed with the housing. The positioning part is used to limit the rotation of the drive gear.

[0015] Preferably, the surface of the bearing is provided with a connecting shaft, one end of which passes through the outer shell and is connected to the door body. The door body drives the bearing and the drive gear to rotate through the connecting shaft.

[0016] Preferably, the hook has a support shaft inside, which slides inside the buffer. The support shaft can provide movement for the hook and also allow the hook to move to a designated position for rotation.

[0017] Preferably, the buffer is internally connected with two sets of hexagonal countersunk screws, which facilitate the fixing of the buffer.

[0018] Preferably, the surface of the top cover is connected with bolts at equal intervals, and the bolts penetrate the top cover and extend into the interior of the outer shell. The bolts facilitate the fixing of the top cover to the top of the outer shell and seal the components inside the outer shell.

[0019] Preferably, the housing has a toothed groove inside for sliding the rack, and the toothed groove and the housing are integrally formed.

[0020] Preferably, a buckle is connected to one side of the surface of the top cover, and the buckle and the top cover are integrally formed. A slot for engaging the buckle is opened inside one side of the outer shell, and the slot and the outer shell are integrally formed. The slot facilitates the buckle to be engaged, and it can be fixed by screwing in the internal hexagon countersunk screw.

[0021] Compared with the prior art, the beneficial effects of this utility model are:

[0022] (1) The opening and closing of the buffer is controlled by the transmission gear set driving the rack and hook. It can provide a stable buffering effect during the opening and closing of the door. When closing the door, it can automatically and slowly close smoothly from 80°, avoiding the large impact force generated by the rapid closing of the door, reducing the damage to the door body, door frame and surrounding items, and also reducing the noise generated when closing the door, providing a more comfortable and quiet environment for users.

[0023] (2) By limiting the maximum opening angle of the product to 94°, and allowing the door to stop freely between 85° and 94°, this design can meet the daily passage needs and prevent the door from colliding with surrounding objects or damaging the structure of the door closer itself due to excessive opening angle, thus improving the safety of use and the service life of the door closer.

[0024] (3) The positioning pins connected inside the housing pass through multiple driven gears, the positioning block of the driving gear cooperates with the positioning part of the housing, and the sliding contact of the tooth groove with the rack makes the entire transmission structure more stable, ensuring the accuracy and reliability of the gear transmission, reducing wear between components, and extending the overall service life of the door closer.

[0025] (4) The top cover is connected to the outer shell by bolts at equal intervals, and the buckle on one side of the top cover is engaged with the slot on one side of the outer shell. This design facilitates the installation and disassembly of the door closer, makes it easier for later maintenance and repair work, and reduces maintenance costs. Attached Figure Description

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

[0027] Figure 2 This is a schematic diagram of the overall connection of this utility model;

[0028] Figure 3 This is a top-view structural diagram of the present invention.

[0029] Figure 4 This is a top-view structural diagram of the present invention from a second perspective.

[0030] Figure 5 This is a top-view, third-person perspective structural diagram of the present invention;

[0031] Figure 6 This is a top-view fourth-angle structural diagram of the present invention;

[0032] Figure 7 This is a top-view, fifth-angle structural diagram of the present invention.

[0033] In the diagram: 1. Driven gear; 2. Driven gear A; 3. Upper gear; 4. Lower gear; 5. Top cover; 6. Rack; 7. Housing; 8. Locating pin; 9. Socket head screw; 10. Buffer; 11. Bearing; 12. Bolt; 13. Locating block; 14. Driven gear B; 15. Driven gear C; 16. Driven gear D; 17. Driven gear E; 18. Mounting groove; 19. Cavity; 20. Gear groove; 21. Connecting shaft; 22. Protrusion; 23. Hook; 24. Hook part; 25. Door body; 26. Locating part; 27. Support shaft; 28. Buckle; 29. ​​Slot. Detailed Implementation

[0034] 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.

[0035] Please see Figure 1-7 This utility model provides a technical solution: a heavy-duty buffer door closer, comprising: a housing 7, wherein an installation groove 18 is provided inside the housing 7, and a top cover 5 is provided on the top of the housing 7;

[0036] Cavity 19, which is formed inside the outer shell 7 and located on one side of the mounting groove 18, and a buffer 10 is provided inside the cavity 19;

[0037] A rack 6 is disposed inside the housing 7 and located on one side of the buffer 10. A hook 23 is disposed inside the buffer 10.

[0038] Hook 24 is provided on one side of hook 23, and a protrusion 22 is provided on one side of rack 6, the protrusion 22 is in contact with hook 24;

[0039] The housing 7 has a transmission gear set located in the mounting groove 18. The driving gear 1 of the transmission gear set drives the driven gear A2, driven gear B14, driven gear C15, driven gear D16, driven gear E17 and lower gear 4, which in turn drives the rack 6 and the hook 23 to move, so as to form a buffer.

[0040] The transmission gear set includes a bearing 11 located inside the housing 7 and connected to the drive gear 1. The bearing 11 is fixedly connected to the drive gear 1. The drive gear 1 is connected to one side of the mounting groove 18. The driven gear A2 meshes with the surface of the drive gear 1. The driven gear B14 meshes with the surface of the driven gear A2. The driven gear C15 meshes with the surface of the driven gear B14. The driven gear D16 meshes with the surface of the driven gear C15. An upper gear 3 is connected to the top of the driven gear D16. The driven gear E17 meshes with the surface of the upper gear 3. The lower gear 4 is connected to the bottom of the driven gear E17 and meshes with the rack 6.

[0041] The housing 7 is internally connected to a positioning pin 8, which passes through driven gears A2, B14, C15, D16, and E17. The positioning pin 8 facilitates the rotation of driven gears A2, B14, C15, D16, and E17, resulting in smoother rotation.

[0042] Positioning blocks 13 are connected to both sides of the surface of the drive gear 1. The positioning blocks 13 and the drive gear 1 are integrally formed. The housing 7 is provided with a positioning part 26 for fixing the positioning blocks 13. The positioning part 26 and the housing 7 are integrally formed. The positioning part 26 is used to limit the rotation of the drive gear 1.

[0043] The surface of the bearing 11 is provided with a connecting shaft 21. One end of the connecting shaft 21 passes through the outer shell 7 and is connected to the door body 25. The door body 25 drives the bearing 11 and the drive gear 1 to rotate through the connecting shaft 21.

[0044] The hook 23 is provided with a support shaft 27 inside. The support shaft 27 is slidably connected inside the buffer 10. The support shaft 27 can provide movement for the hook 23 and can also move the hook 23 to a designated position for rotation.

[0045] The buffer 10 is internally connected to a countersunk hexagon screw 9, and there are two sets of countersunk hexagon screws 9. The countersunk hexagon screws 9 facilitate the fixing of the buffer 10.

[0046] Bolts 12 are evenly spaced on the surface of the top cover 5, and the bolts 12 extend through the top cover 5 and into the interior of the outer shell 7. The bolts 12 are designed to allow the top cover 5 to be fixed to the top of the outer shell 7 and to seal the components inside the outer shell 7.

[0047] The outer shell 7 has a toothed groove 20 inside for sliding the rack 6, and the toothed groove 20 and the outer shell 7 are integrally formed.

[0048] A buckle 28 is connected to one side of the surface of the top cover 5. The buckle 28 and the top cover 5 are integrally formed. A slot 29 for engaging the buckle 28 is provided inside one side of the outer shell 7. The slot 29 and the outer shell 7 are integrally formed. The slot 29 facilitates the buckle 28 to be engaged. It can be fixed by screwing in the internal hexagon countersunk screw 9.

[0049] Specifically, when using it:

[0050] When the door begins to open under the action of external force, the door body 25 drives the connecting shaft 21 to rotate. The connecting shaft 21 is connected to the bearing 11 inside the drive gear 1, so the rotation of the connecting shaft 21 will drive the drive gear 1 to rotate. After the drive gear 1 rotates, the driven gear A2 meshing with it begins to rotate. The driven gear A2 then drives the driven gear B14 meshing with it to rotate, and so on. The driven gears C15, D16, and E17 rotate in succession. The upper gear 3 connected to the top of the driven gear D16 rotates with the driven gear D16, which in turn drives the driven gear E17 meshing with the upper gear 3 to rotate. The lower gear 4 at the bottom of the driven gear E17 also rotates accordingly.

[0051] The lower gear 4 meshes with the rack 6. Under the transmission action of the gear set, the rack 6 begins to move. Since the protrusion 22 on one side of the rack 6 contacts the hook 24 on one side of the hook 23 inside the buffer 10, the movement of the rack 6 will drive the hook 23, thereby opening the buffer 10.

[0052] When the door 25 is opened to 85°, the buffer 10 is fully opened. At this time, the rack 6 of the gear set disengages from the hook 23 of the buffer 10, and the door can stop freely in the range of 85°-94°. When the door is opened to 94°, the limiting structure inside the door closer plays its role, limiting the door 25 from continuing to open. The maximum opening angle of the product is 94°. During this process, the positioning pin 8 inside the housing 7 passes through the driven gear A2, driven gear B14, driven gear C15, driven gear D16 and driven gear E17, which plays the role of positioning and stabilizing the gear set, ensuring stable meshing transmission between the gears. The positioning blocks 13 on both sides of the surface of the driving gear 1 cooperate with the positioning part 26 inside the housing 7 to further fix the position of the driving gear 1 and ensure transmission accuracy.

[0053] When the door closes to 80° under external force, the door body 25 drives the connecting shaft 21 to rotate in the opposite direction, which in turn drives the drive gear 1 to rotate in the opposite direction. The reverse rotation of the drive gear 1, through the transmission of the gear set, causes the lower gear 4 to rotate in the opposite direction, thereby driving the rack 6 to move in the opposite direction. During the reverse movement of the rack 6, its protrusion 22 engages with the hook 24 of the pull hook 23 of the buffer 10. The rack 6 continues to move, driving the pull hook 23, causing the heavy buffer 10 to begin to close automatically. Under the action of the buffer 10, the door body 25 automatically closes slowly and smoothly from 80°. The buffer 10 has two sets of internal hexagon countersunk screws 9 connected inside, which may be used to adjust the performance of the buffer 10, such as the buffering force. The support shaft 27 inside the pull hook 23 slides inside the buffer 10 to ensure that the pull hook 23 moves smoothly inside the buffer 10. The toothed groove 20 opened inside the outer shell 7 is used to slide the rack 6, making the movement of the rack 6 more stable and reducing shaking and friction.

[0054] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A heavy-duty buffer door closer, characterized in that, include: The outer casing (7) has an installation groove (18) inside and a top cover (5) on the top of the outer casing (7). A cavity (19) is formed inside the outer shell (7) on one side of the mounting groove (18), and a buffer (10) is provided inside the cavity (19). A rack (6) is provided inside the housing (7), the rack (6) is located on one side of the buffer (10), and a hook (23) is provided inside the buffer (10). Hook (24), the hook (24) is provided on one side of the hook (23), and a protrusion (22) is provided on one side of the rack (6), the protrusion (22) is in contact with the hook (24); The housing (7) is equipped with a transmission gear set located in the mounting groove (18). The driving gear (1) of the transmission gear set drives the driven gear A (2), driven gear B (14), driven gear C (15), driven gear D (16), driven gear E (17) and lower gear (4), which in turn drives the rack (6) and hook (23) to move, so as to form a buffer.

2. The heavy-duty buffer door closer according to claim 1, characterized in that: The transmission gear set includes a bearing (11) inside the housing (7) connected to the inside of the driving gear (1). The driving gear (1) is connected to the inside side of the mounting groove (18). The driven gear A (2) meshes with the surface of the driving gear (1). The driven gear B (14) meshes with the surface of the driven gear A (2). The driven gear C (15) meshes with the surface of the driven gear B (14). The driven gear D (16) meshes with the surface of the driven gear C (15). The top of the driven gear D (16) is connected to an upper gear (3). The driven gear E (17) meshes with the surface of the upper gear (3). The lower gear (4) is connected to the bottom of the driven gear E (17). The lower gear (4) meshes with a rack (6).

3. A heavy-duty buffer door closer according to claim 2, characterized in that: The housing (7) is internally connected to a positioning pin (8), which passes through driven gear A (2), driven gear B (14), driven gear C (15), driven gear D (16) and driven gear E (17).

4. A heavy-duty buffer door closer according to claim 1, characterized in that: The driving gear (1) has positioning blocks (13) connected to both sides of its surface, and the housing (7) has a positioning part (26) for fixing the positioning blocks (13).

5. A heavy-duty buffer door closer according to claim 2, characterized in that: The surface of the bearing (11) is provided with a connecting shaft (21), one end of which passes through the outer shell (7) and is connected to the door body (25).

6. A heavy-duty buffer door closer according to claim 1, characterized in that: The hook (23) has a support shaft (27) inside, which slides inside the buffer (10).

7. A heavy-duty buffer door closer according to claim 1, characterized in that: The buffer (10) is internally connected to a countersunk hexagonal screw (9), and there are two sets of countersunk hexagonal screws (9).

8. A heavy-duty buffer door closer according to claim 1, characterized in that: The surface of the top cover (5) is connected with bolts (12) at equal intervals, and the bolts (12) extend through the top cover (5) and into the interior of the outer shell (7).

9. A heavy-duty buffer door closer according to claim 1, characterized in that: The housing (7) has a toothed groove (20) inside for sliding the rack (6).

10. A heavy-duty buffer door closer according to claim 1, characterized in that: The top cover (5) has a buckle (28) connected to one side of its surface, and the outer shell (7) has a slot (29) inside one side for engaging the buckle (28).

Images