Heavy buffer door closer

Abstract

The invention discloses a heavy buffer 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 beneficial effects that the transmission gear set drives the rack and the drag hook to control opening and closing of the buffer, 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 by rapid closing of the door 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] The present invention relates to the technical field of door closers, and particularly to a heavy-duty buffer door closer. Background Art

[0002] At present, most of the buffer door closers installed on louver hinge doors use mechanical compression springs for energy storage and hydraulic cylinders for damping, and achieve buffer door closing through a bypass throttle oil circuit. Most of their transmission devices are gear-rack mechanisms. When the door is pushed or pulled by an external force, the spring is compressed through the transmission rod, gear-rack, and piston rod. When the external force disappears, the spring force begins to be released, and the door is closed through the piston rod, gear-rack, and transmission rod. When the door is approaching closing, the synchronously moving piston closes the main oil return passage, and the hydraulic oil flows back through the bypass throttle passage, generating damping for closing the door. Since a mechanical compression spring is used as the energy storage device, it is difficult to maintain the consistency of product technical indicators due to the limitations of metal materials and heat treatment processes.

[0003] In the prior art, most doors cannot provide a stable buffering effect during the opening and closing process. When the door is closed, it cannot start to automatically close slowly and smoothly from a specific angle, which is likely to generate a large impact force. This will not only damage the door body, door frame, and surrounding items, but also generate a large amount of noise, affecting the use experience. Moreover, there may be no reasonable limit on the opening angle of the door, which can neither meet the daily passage requirements nor prevent the door body from being damaged by collision due to an excessive opening angle or damage to the structure of the door closer itself, reducing the use safety and the service life of the door closer.

[0004] Therefore, we introduce a heavy-duty buffer door closer. Summary of the Invention

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

[0006] To achieve the above purpose, the present invention provides the following technical solution: A heavy-duty buffer door closer, comprising: a housing, a cavity, a rack, and a hook portion;

[0007] An installation groove is formed inside the housing, and the installation groove and the housing are integrally formed. A top cover is provided on the top of the housing;

[0008] The cavity is formed inside the housing on one side of the installation groove, and the cavity and the housing are integrally formed. A buffer is provided inside the cavity;

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

[0010] The hook portion is provided on one side of the draw hook, and the hook portion and the draw hook are integrally formed. A convex block is provided on one side of the rack, and the convex block and the rack are integrally formed. The convex block is in contact with the hook portion;

[0011] Inside the housing, a transmission gear set is provided in the installation groove. The driving gear of the transmission gear set drives the driven gear A, driven gear B, driven gear C, driven gear D, driven gear E and the lower gear to drive the rack and the draw hook to move, so as to form a buffer.

[0012] Preferably, the transmission gear set includes a bearing connected inside the driving gear inside the housing. The bearing and the driving gear are fixedly arranged. The driving gear is connected to one side inside the installation groove. The driven gear A meshes on the surface of the driving gear. The driven gear B meshes on the surface of the driven gear A. The driven gear C meshes on the surface of the driven gear B. The driven gear D meshes on the surface of the driven gear C. The top of the driven gear D is connected with an upper gear. The driven gear E meshes with the surface of the upper gear. The lower gear is connected to the bottom of the driven gear E. The lower gear meshes with the rack.

[0013] Preferably, a positioning pin is connected inside the housing. The positioning pin penetrates through the driven gear A, driven gear B, driven gear C, driven gear D and driven gear E. The setting of the positioning pin facilitates the rotation of the driven gear A, driven gear B, driven gear C, driven gear D and driven gear E, and the rotation is more smooth.

[0014] Preferably, positioning blocks are respectively connected to both sides of the surface of the driving gear. The positioning blocks and the driving gear are integrally formed. A positioning portion for fixing the positioning blocks is provided inside the housing. The positioning portion and the housing are integrally formed. The positioning portion is used to limit the rotation of the driving gear.

[0015] Preferably, a connecting rotating shaft is provided on the surface of the bearing. One end of the connecting rotating shaft penetrates through the housing and is connected with a door body. The door body drives the bearing and the driving gear to rotate through the connecting rotating shaft.

[0016] Preferably, a support shaft is provided inside the draw hook. The support shaft is slidably connected inside the buffer. The support shaft can provide the movement of the draw hook and also allow the draw hook to move to a specified position for rotation.

[0017] Preferably, two groups of internal hexagon countersunk head screws are connected inside the buffer. The internal hexagon countersunk head screws facilitate the fixing of the buffer.

[0018] Preferably, bolts are connected to the surface of the top cover at equal intervals, and the bolts penetrate through the top cover and extend into the interior of the housing. The bolts facilitate fixing the top cover on the top of the housing and sealing the components inside the housing.

[0019] Preferably, a tooth groove for sliding the rack is formed inside the housing, and the tooth 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 card slot for clamping the buckle is formed inside one side of the housing, and the card slot and the housing are integrally formed. The card slot facilitates the buckle to be buckled in, and then the internal hexagonal countersunk head screw can be screwed in to fix it.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] (1) By driving the rack and the hook through the transmission gear set to control the opening and closing of the buffer, a stable buffering effect can be provided during both the opening and closing of the door. When closing the door, the door can start to automatically close slowly and smoothly from 80°, avoiding large impact forces generated by rapid door closing, reducing damage to the door body, door frame, and surrounding items, and at the same time reducing the noise generated during door closing, providing a more comfortable and quiet environment for users;

[0023] (2) By limiting the maximum opening angle of the product to 94°, and the door can freely pause between 85° - 94°. This design can not only meet the usage requirements such as daily passage, but also prevent the door body from colliding with surrounding objects due to excessive opening angle, or damaging the structure of the door closer itself, improving the safety of use and the service life of the door closer;

[0024] (3) Through the positioning pins connected inside the housing penetrating multiple driven gears, the positioning block of the driving gear cooperating with the positioning part of the housing, and the sliding effect of the tooth groove on the rack, etc., the entire transmission structure is made more stable, ensuring the accuracy and reliability of the gear set transmission, reducing wear between components, and extending the overall service life of the door closer;

[0025] (4) By connecting the top cover to the housing through bolts at equal intervals, and the buckle on one side of the top cover being clamped with the card slot on one side of the housing, this design facilitates the installation and disassembly of the door closer, is convenient for later maintenance and repair work, and reduces the maintenance cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a structural schematic diagram of the present invention;

[0027] Figure 2 is a structural schematic diagram when the whole of the present invention is connected;

[0028] Figure 3 It is a schematic structural diagram of the first perspective of the top view of the present invention;

[0029] Figure 4 It is a schematic structural diagram of the second perspective of the top view of the present invention;

[0030] Figure 5 It is a schematic structural diagram of the third perspective of the top view of the present invention;

[0031] Figure 6 It is a schematic structural diagram of the fourth perspective of the top view of the present invention;

[0032] Figure 7 It is a schematic structural diagram of the fifth perspective of the top view of the present invention.

[0033] In the figure: 1, driving gear; 2, driven gear A; 3, upper gear; 4, lower gear; 5, top cover; 6, rack; 7, housing; 8, positioning pin; 9, socket head cap screw; 10, buffer; 11, bearing; 12, bolt; 13, positioning block; 14, driven gear B; 15, driven gear C; 16, driven gear D; 17, driven gear E; 18, installation groove; 19, cavity; 20, tooth groove; 21, connecting rotating shaft; 22, convex block; 23, hook; 24, hook part; 25, door body; 26, positioning part; 27, support shaft; 28, buckle; 29, clamping groove. Detailed implementation manners

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0035] Please refer to Figures 1-7 , the present invention provides a technical solution: a heavy-duty buffer door closer, comprising: a housing 7, an installation groove 18 is opened inside the housing 7, and a top cover 5 is arranged on the top of the housing 7;

[0036] A cavity 19, the cavity 19 is opened inside the housing 7 on one side of the installation groove 18, and a buffer 10 is arranged inside the cavity 19;

[0037] A rack 6, the rack 6 is arranged inside the housing 7, the rack 6 is located on one side of the buffer 10, and a hook 23 is arranged inside the buffer 10;

[0038] A hook part 24, the hook part 24 is arranged on one side of the hook 23, a convex block 22 is arranged on one side of the rack 6, and the convex block 22 is in contact with the hook part 24;

[0039] Inside the housing 7, a transmission gear set is arranged in the installation groove 18. The driving gear 1 of the transmission gear set drives the driven gear A2, the driven gear B14, the driven gear C15, the driven gear D16, the driven gear E17 and the lower gear 4, driving the rack 6 and the hook 23 to move to form buffering.

[0040] The transmission gear set includes a bearing 11 connected inside the driving gear 1 inside the housing 7. The bearing 11 is fixedly arranged with the driving gear 1. The driving gear 1 is connected to one side inside the installation groove 18. The driven gear A2 meshes on the surface of the driving gear 1. The driven gear B14 meshes on the surface of the driven gear A2. The driven gear C15 meshes on the surface of the driven gear B14. The driven gear D16 meshes on the surface of the driven gear C15. The 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. The lower gear 4 meshes with the rack 6.

[0041] A positioning pin 8 is connected inside the housing 7. The positioning pin 8 penetrates through the driven gear A2, the driven gear B14, the driven gear C15, the driven gear D16 and the driven gear E17. The setting of the positioning pin 8 facilitates the rotation of the driven gear A2, the driven gear B14, the driven gear C15, the driven gear D16 and the driven gear E17, and the rotation is smoother.

[0042] Positioning blocks 13 are respectively connected to both sides of the surface of the driving gear 1. The positioning blocks 13 are integrally formed with the driving gear 1. A positioning portion 26 for fixing the positioning blocks 13 is arranged inside the housing 7. The positioning portion 26 is integrally formed with the housing 7, and the positioning portion 26 is used to limit the rotation of the driving gear 1.

[0043] A connecting rotating shaft 21 is arranged on the surface of the bearing 11. One end of the connecting rotating shaft 21 penetrates through the housing 7 and is connected to a door body 25. The door body 25 drives the bearing 11 and the driving gear 1 to rotate through the connecting rotating shaft 21.

[0044] A support shaft 27 is arranged inside the hook 23. The support shaft 27 is slidably connected inside the buffer 10. The support shaft 27 can provide the movement of the hook 23 and also allow the hook 23 to move to a specified position for rotation.

[0045] Hexagon socket countersunk head screws 9 are connected inside the buffer 10, and the number of the hexagon socket countersunk head screws 9 is two groups. The hexagon socket countersunk head screws 9 facilitate the fixing of the buffer 10.

[0046] The surface of the top cover 5 is connected with bolts 12 at equal intervals, and the bolts 12 penetrate through the top cover 5 and extend into the interior of the outer shell 7. The arrangement of the bolts 12 facilitates the fixing of the top cover 5 on the top of the outer shell 7 and seals the components inside the outer shell 7.

[0047] A tooth groove 20 for slidingly connecting the rack 6 is formed inside the outer shell 7, and the tooth groove 20 and the outer shell 7 are integrally formed.

[0048] One side of the surface of the top cover 5 is connected with a buckle 28, and the buckle 28 and the top cover 5 are integrally formed. A clamping groove 29 for clamping the buckle 28 is formed inside one side of the outer shell 7, and the clamping groove 29 and the outer shell 7 are integrally formed. The clamping groove 29 facilitates the insertion of the buckle 28, and the internal hexagonal countersunk head screw 9 can be screwed in to fix it.

[0049] Specifically, when in use:

[0050] When the door starts to open under the action of an external force, the door body 25 drives the connecting rotating shaft 21 to rotate. The connecting rotating shaft 21 is connected to the bearing 11 inside the driving gear 1. Therefore, the rotation of the connecting rotating shaft 21 will drive the driving gear 1 to rotate. After the driving gear 1 rotates, the driven gear A2 meshing with it starts to rotate. The driven gear A2 drives the driven gear B14 meshing with it to rotate, and so on. The driven gear C15, the driven gear D16, and the driven gear E17 rotate in sequence. The upper gear 3 connected to the top of the driven gear D16 rotates with the driven gear D16, and then 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 of the gear set, the rack 6 starts to move. Since the convex block 22 on one side of the rack 6 contacts the hook part 24 on one side of the hook 23 inside the buffer 10, the movement of the rack 6 will drive the hook 23, and then the buffer 10 is opened;

[0052] When the door body 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 freely pause within the range of 85° - 94°. When the door is opened to 94°, the limit structure inside the door closer comes into play to limit the continuous opening of the door body 25. The maximum opening angle of the product is 94°. During this process, the positioning pin 8 inside the outer shell 7 penetrates through the driven gear A2, the driven gear B14, the driven gear C15, the driven gear D16, and the driven gear E17, playing a role in positioning and stabilizing the gear set, ensuring the 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 parts 26 inside the outer shell 7 to further fix the position of the driving gear 1 and ensure the transmission accuracy;

[0053] When the door is closed to 80° under the action of an external force, the door body 25 drives the connecting rotating shaft 21 to rotate in the reverse direction, and then drives the driving gear 1 to rotate in the reverse direction. The reverse rotation of the driving gear 1 is transmitted through the gear set, causing the lower gear 4 to rotate in the reverse direction, thereby driving the rack 6 to move in the reverse direction. During the reverse movement of the rack 6, its convex block 22 is buckled into the hook portion 24 of the hook 23 of the buffer 10. The rack 6 continues to move, driving the hook 23, causing the heavy buffer 10 to start closing automatically. Under the action of the buffer 10, the door body 25 starts to close slowly and smoothly automatically from 80°. There are two groups of socket head cap screws 9 connected inside the buffer 10, which may be used to adjust the performance of the buffer 10, such as the buffering force, etc. The support shaft 27 inside the hook 23 is slidably connected inside the buffer 10 to ensure smooth movement of the hook 23 inside the buffer 10. The tooth groove 20 opened inside the outer shell 7 is used to slidably connect the rack 6, making the movement of the rack 6 more stable and reducing shaking and friction.

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

Claims

1. A heavy-duty buffer door closer, characterized in that: include: A housing (7), wherein a mounting groove (18) is provided inside the housing (7), and a top cover (5) is provided on the top of the housing (7); A cavity (19), the cavity (19) being opened inside the housing (7) and located on one side of the mounting groove (18), and a buffer (10) being arranged inside the cavity (19); A rack (6), the rack (6) being arranged inside the housing (7), the rack (6) being located on one side of the buffer (10), and a draw hook (23) being arranged inside the buffer (10); A hook portion (24), the hook portion (24) being arranged on one side of the draw hook (23), a protrusion (22) being arranged on one side of the rack (6), the protrusion (22) being in contact with the hook portion (24); A transmission gear set is arranged in the mounting groove (18) inside the housing (7), and the driving gear (1) of the transmission gear set drives the driven gear A (2), the driven gear B (14), the driven gear C (15), the driven gear D (16), the driven gear E (17) and the lower gear (4), thereby driving the rack (6) and the hook (23) to move, so as to form a buffer.

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

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

4. A heavy-duty buffer door closer according to claim 1, characterized in that: Positioning blocks (13) are respectively connected to both sides of the surface of the driving gear (1), and a positioning portion (26) for fixing the positioning block (13) is provided inside the housing (7).

5. A heavy-duty buffer door closer according to claim 2, characterized in that: A connecting shaft (21) is provided on the surface of the bearing (11), and one end of the connecting shaft (21) 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: A support shaft (27) is provided inside the pull hook (23), and the support shaft (27) is slidably connected inside the buffer (10).

7. A heavy-duty buffer door closer according to claim 1, characterized in that: The buffer (10) is internally connected with hexagon socket countersunk screws (9), and the number of the hexagon socket countersunk screws (9) is two groups.

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

9. The heavy-duty buffer door closer according to claim 1, characterized in that: A tooth groove (20) for slidingly connecting the rack (6) is provided inside the housing (7).

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

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