A simple electric door closer slideway structure and door closer

Abstract

The present invention relates to a simple electric door closer slide structure, comprising a housing; a door-closed feedback unit, a limit unit, a main control PCBA and a sliding assembly are arranged in the housing, the main control PCBA is electrically connected to the door-closed feedback unit and the limit unit, and the sliding assembly is slidably arranged at the bottom of the housing; the sliding assembly comprises a slider and a fixing screw assembly, the slider is slidably arranged at the bottom of the housing, the fixing screw assembly is fixedly arranged on the slider, and the relative position of the fixing screw assembly on the slider can be adjusted outside the housing. By adjusting the position of the fixing screw assembly on the slider, different door opening angles can be set; thus, different door opening angles can be achieved by only adjusting the position of the fixing screw assembly on the slider, and the operation is very simple and convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of door closers, and more particularly to a simple electric door closer slideway structure and a door closer. Background Art

[0002] Fire doors are required in modern buildings according to fire prevention regulations. Fire doors are installed in some passages where people frequently pass through, so they need to be kept open. Electric door closers are installed to keep the fire doors open. When a fire occurs, the door closer force storage mechanism closes the fire door.

[0003] Existing electric door closers mostly use a slide groove installed in parallel on the door frame, and the slide groove is connected to a hydraulic main body installed on the door body through a connecting rod, so that the door opening positioning is achieved by controlling the position of the connecting rod on the slide groove.

[0004] The slide mostly adopts aluminum profile shell, with built-in door closing feedback unit, limit unit, main control PCBA and other electronic control components. The internal main control PCBA, limit unit, door closing feedback unit components and the electrical signal connection lines between them need to be plugged in from the outside of one end of the aluminum profile shell, which is very inconvenient to install.

[0005] At the same time, in order to achieve different door opening angles, it is necessary to adjust the position of the limit unit in the shell, and then fix it with screws. Due to the complex structure of the limit unit and the shell, it is difficult to adjust the position of the limit unit in the shell and the operation is very inconvenient. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide a simplified electric door closer slide slot structure and a door closer in view of the defects of the prior art electric door closer slide slot structure being inconvenient to install and the door opening angle being inconvenient to adjust.

[0007] On the one hand, according to an embodiment of the present invention, a simplified electric door closer slideway structure comprises a housing; a door closing feedback unit, a limit unit, a main control PCBA and a sliding assembly are arranged in the housing, the main control PCBA is electrically connected to the door closing feedback unit and the limit unit, and the sliding assembly is slidably arranged at the bottom of the housing;

[0008] The sliding assembly includes a slider and a fixing screw assembly. The slider is slidably arranged at the bottom of the shell, and the fixing screw assembly is fixedly arranged on the slider. The relative position of the fixing screw assembly on the slider can be adjusted outside the shell.

[0009] On the other hand, according to an embodiment of the present invention, a door closer includes an electric door closer slide slot structure, a connecting rod and a hydraulic body, one end of the connecting rod is hinged to the hydraulic body, and the other end of the connecting rod is hinged to the sliding assembly of the electric door closer slide slot structure.

[0010] The beneficial effects of the present invention are:

[0011] By configuring the sliding assembly as a slider and a fixing screw assembly, and adjusting the position of the fixing screw assembly on the slider, different door opening angles can be set; thus, different door opening angles can be achieved by only adjusting the position of the fixing screw assembly on the slider without adjusting the position of the limiting unit in the housing. Moreover, since the position of the fixing screw assembly on the slider can be adjusted outside the housing, the operation is very simple and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. The drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work:

[0013] Figure 1 is a schematic structural diagram of a door closer according to a first embodiment of the present invention;

[0014] Figure 2 is a schematic cross-sectional view of the sliding groove structure of the electric door closer according to the first embodiment of the present invention;

[0015] Figure 3 Schematic diagram of the exploded structure of the electric door closer slideway structure according to the first embodiment of the present invention;

[0016] Figure 4 1 is a schematic structural diagram of a U-shaped guide rail according to a first embodiment of the present invention;

[0017] Figure 5 is a schematic diagram of the exploded structure of the sliding assembly of the first embodiment of the present invention;

[0018] Figure 6 is a schematic cross-sectional view of the sliding groove structure of an electric door closer according to a second embodiment of the present invention;

[0019] Figure 7 is a schematic diagram of the exploded structure of the sliding assembly of the second embodiment of the present invention;

[0020] Figure 8 It is a schematic diagram of the exploded structure of the electric door closer slideway structure of the third embodiment of the present invention.

[0021] In the above drawings: 10, hydraulic body; 20, connecting rod; 30, electric door closer slide structure; 301, plastic upper shell; 302, U-shaped guide rail; 3021, movable groove; 3022, screw movable groove; 3023, mounting hole; 3024, screw through hole; 303, door closing feedback unit; 304, limit unit; 3041, limit block; 305, first sliding component; 3051, upper fixing plate; 30512, nut column; 30511, limit convex ridge; 3052, first Slider; 30521, serrated groove; 30522, screw groove; 30523, inclined surface; 3053, lower fixing plate; 3054, first screw; 306, main control PCBA; 307, second sliding assembly; 30531, limit plate; 30532, positioning boss; 30533, first through-hole column; 3071, second slider; 3072, bottom plate; 3073, second screw; 3074, fixing screw; 30721, strip hole; 30722, second through-hole column. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the following will be described clearly and completely in combination with the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are partial embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the present invention.

[0023] Embodiment 1

[0024] like Figure 1 A door closer includes an electric door closer chute structure 30, a connecting rod 20 and a hydraulic body 10, one end of the connecting rod 20 is hinged to the hydraulic body 10, and the other end of the connecting rod 20 is hinged to the electric door closer chute structure 30. The hydraulic body 10 is fixed to the door leaf through four through holes thereon, and the electric door closer chute structure 30 is fixed to the door frame or the wall through four holes thereon. By limiting one end of the connecting rod 20 in the electric door closer chute structure 30, the fire door is in a normally open or normally closed state. The hydraulic body 10 is a prior art, and this application does not further describe its structure. The following focuses on describing the electric door closer chute structure 30.

[0025] Figure 2 is a schematic cross-sectional view of the electric door closer slideway structure 30, Figure 3 This is a schematic diagram of the exploded structure of the electric door closer slideway structure. Figure 2-3A simple electric door closer slide structure includes a shell, the shell includes a U-shaped guide rail 302 and a plastic upper shell 301, the U-shaped guide rail 302 and the plastic upper shell 301 are buckled together to form a accommodating cavity, a door closing feedback unit 303, a limit unit 304, a main control PCBA 306 and a first sliding component 305 are arranged in the shell, the main control PCBA 306 is electrically connected to the door closing feedback unit 303 and the limit unit 304, and the first sliding component 305 is slidably arranged at the bottom of the shell.

[0026] Specifically, Figure 4 , Figure 4 302 is a schematic diagram of the structure of the U-shaped guide rail 302. The U-shaped guide rail 302 is made of a bent metal sheet. Compared with the prior art, the shell composed of the bent metal sheet and the plastic upper shell 301 is made of stretched aluminum alloy and machined to fix the holes, etc., which ensures the shell strength while lowering the material cost.

[0027] like Figure 4 The cross section of the U-shaped guide rail 302 is a U-shaped shape with the opening facing upward. Four mounting holes 3023 are provided at both ends, which correspond to the four holes on the plastic upper shell 301, and are fixed to the door frame or wall together by four screws. A movable groove 3021 and a screw movable groove 3022 are provided on the bottom surface. The door closing feedback unit 303 is fixed to the screw movable groove 3022 by screws. By adjusting the position of the door closing feedback unit 303 on the screw movable groove 3022, the door closing state can be adjusted.

[0028] like Figure 4 , screw through holes 3024 are set on the left and right side plates of the U-shaped guide rail 302. The limiting unit 304 is fixed on the screw through holes 3024 by screws. Figure 2 The main control PCBA 306 is fixedly disposed in the plastic upper shell 301 .

[0029] As can be seen from the above, during assembly, the door closing feedback unit 303 and the limit unit 304 are first fixed on the U-shaped guide rail 302, the first sliding component 305 is slidably installed on the movable groove 3021, and then the main control PCBA 306 is fixed on the plastic upper shell 301. After the overall wiring is connected, the plastic upper shell 301 is fixed to the U-shaped guide rail 302. There is no need to insert it from one end of the profile, and the assembly is very convenient.

[0030] The door closing feedback unit 303, the limit unit 304 and the main control PCBA 306 are all known technologies, and this application does not describe their structures and principles. The following focuses on one of the improved points, the sliding component, for in-depth description:

[0031] like Figure 5 , Figure 53 is an exploded structural diagram of the first sliding assembly 305. The first sliding assembly 305 includes a first sliding block 3052 and a fixing screw assembly, and the fixing screw assembly includes an upper fixing plate 3051, a lower fixing plate 3053 and a first screw 3054.

[0032] like Figure 5 ,refer to Figure 4 The cross section of the first slider 3052 is T-shaped, the lower end of the first slider 3052 can be slidably inserted into the movable groove 3021 of the U-shaped guide rail 302, the upper end of the first slider 3052 is in the U-shaped guide rail 302, and the lower end of the first slider 3052 is exposed outside the U-shaped guide rail 302. The width of the upper end of the first slider 3052 matches the clearance of the inner cavity of the U-shaped guide rail 302, and the lower end of the first slider 3052 matches the clearance of the movable groove 3021. Preferably, the clearance between the upper end of the first slider 3052 and the inner cavity of the U-shaped guide rail 302 is smaller than the clearance between the lower end of the first slider 3052 and the movable groove 3021, so as to reduce the wear of the first slider 3052 when sliding on the U-shaped guide rail 302.

[0033] like Figure 5 , a screw groove 30522 is provided in the first slider 3052 for the screw rod of the first screw 3054 to pass through. A nut column 30512 is integrally provided on the upper fixing plate 3051, and a first through-hole column 30533 is integrally provided on the lower surface of the lower fixing plate 3053. The height of the first through-hole column 30533 is greater than the thickness of the connecting rod 20. The first screw 3054 passes through the first through-hole column 30533, the limiting plate 30531 of the lower fixing plate 3053, the screw groove 30522 and the upper fixing plate 3051 from bottom to top, and the first screw 3054 is threadedly connected with the nut column 30512 of the upper fixing plate 3051. Reference Figure 1 A through hole is provided on one end of the connecting rod 20, and the through hole can be movably sleeved on the outer cylindrical surface of the first through hole column 30533. Figure 2-4 Thus, when the lower fixing plate 3053 slides in the movable groove 3021 of the U-shaped guide rail 302 along with the first slider 3052 , one end of the traction link 20 slides along the movable groove 3021 .

[0034] like Figure 5 When the first screw 3054 is tightened, the upper fixing plate 3051 moves downward, so that the first slider 3052 is clamped and fixed between the upper fixing plate 3051 and the lower fixing plate 3053, and the lower fixing plate 3053 and the slider 3052 form a moving whole; when the first screw 3054 is loosened, the upper fixing plate 3051 moves upward, so that the positions of the upper fixing plate 3051 and the lower fixing plate 3053 on the first slider 3052 can be adjusted;

[0035] So, reference Figure 2-3, it is achieved that the position of the limit unit 304 on the U-shaped guide rail 302 is not adjusted, and the door opening angle positioning of the fire door is achieved by adjusting the position of the lower fixing piece 3053 on the first slider 3052. Since the first screw 3054 is located outside the housing, it is very easy to adjust. The door opening angle positioning of the fire door can be adjusted by simply turning the first screw 3054, which is very simple and convenient, and greatly improves the work efficiency of the installation, use and maintenance of the door closer.

[0036] like Figure 5 , sawtooth grooves 30521 are arranged on both sides of the screw groove 30522 of the first slider 3052, and a limiting ridge 30511 is arranged on the upper fixing plate 3051. When the upper fixing plate 3051 and the lower fixing plate 3053 clamp the first slider 3052, the limiting ridge 30511 is stuck in the sawtooth groove 30521, so that the clamping becomes very firm and cannot slide. A positioning boss 30532 is also arranged on the lower fixing plate 3053. The positioning boss 30532 penetrates into the screw groove 30522 of the first slider 3052 to prevent the lower fixing plate 3053 from rotating when the door is opened or closed. Figure 2 Both ends of the first sliding block 3052 are provided with inclined surfaces 30523 that cooperate with the limiting block 3041 on the limiting unit 304.

[0037] Embodiment 2

[0038] like Figure 6-7 , Figure 6 is a schematic cross-sectional view of the sliding groove structure of the electric door closer of this embodiment; Figure 7 It is a schematic diagram of the exploded structure of the sliding assembly of this embodiment.

[0039] The difference between this embodiment and the first embodiment is the difference in the sliding assembly, and the rest of the structures are the same. For the convenience of distinction and description, the sliding assembly in the first embodiment is named the first sliding assembly, the slider in the first embodiment is named the first slider, and the adjusting screw in the first embodiment is named the first screw; the sliding assembly in the second embodiment is named the second sliding assembly, the slider in the second embodiment is named the second slider, and the adjusting screw in the second embodiment is named the second screw.

[0040] The following is a description of another structure of the sliding assembly in this embodiment:

[0041] The second sliding assembly 307 includes a second slider 3071 and a fixing screw assembly, and the fixing screw assembly includes a base plate 3072 and a second screw 3073. The base plate 3072 is provided with a strip hole 30721, and the fixing screw 3074 passes through the strip hole 30721 to fix the base plate 3072 to the second slider 3071. A second through-hole column 30722 is integrally provided on the lower surface of the base plate 3072, and the connecting rod 20 is movably sleeved on the second through-hole column 30722. The second through-hole column 30722 is threadedly connected with the second screw 3073, and the second screw 3073 prevents the connecting rod 20 from falling off the second through-hole column 30722.

[0042] As can be seen from the above, by loosening the fixing screw 3074, adjusting the position of the bottom plate 3072 on the second slider 3071 and then tightening the fixing screw 3074, the fixed position adjustment of the bottom plate 3072 on the second slider 3071 is achieved, so that the opening angle positioning of the fire door can be adjusted by simply turning the fixing screw 3074. Moreover, the fixing screw 3074 is located outside the shell, which is very simple and convenient to operate, thereby greatly improving the work efficiency of the installation, use and maintenance of the door closer.

[0043] Embodiment 3

[0044] like Figure 8 The difference between this embodiment and the first embodiment is that the installation position of the main control PCBA 306 is different, and the rest of the structures are the same. In this embodiment, the main control PCBA 306 is installed on the limit unit 304, and the connection line is directly left to the outside of the shell for wiring, making the wiring and installation very simple and the installation and maintenance very convenient.

[0045] For ease of understanding, this manual also includes the following brief description of the principle of the limit unit:

[0046] The limit unit contains an electromagnet and a limit block that moves up and down controlled by the electromagnet. A signal switch is set in the main control PBCA. When the door is opened, the slider moves right through the limit block. When the signal switch is triggered, the main control PCBA supplies power to the electromagnet of the limit unit, so that the limit block can position the slider. When the door closer receives the door closing signal from the controller, the main control PCBA controls the power supply circuit of the electromagnet to be cut off, and the limit block loses its limiting effect on the slider, realizing automatic door closing.

[0047] This specification also includes the following possible implementations:

[0048] The fixing screw assembly includes an upper fixing plate, a lower fixing plate and a first screw. A screw groove is provided on the slider, and a first through-hole column is provided on the lower fixing plate. The first screw passes through the first through-hole column, the lower fixing plate, the screw groove and the upper fixing plate in sequence from bottom to top, and the first screw is threadedly connected to the upper fixing plate.

[0049] Sawtooth grooves are arranged on both sides of the screw groove of the sliding block, and a limiting convex ridge is arranged on the upper fixing plate.

[0050] Both ends of the sliding block are provided with inclined surfaces which cooperate with the limiting blocks of the limiting unit.

[0051] The lower fixing plate is also provided with a positioning boss which can penetrate deeply into the screw groove of the sliding block.

[0052] The fixing screw assembly comprises a bottom plate, on which strip holes are arranged, and the fixing screws pass through the strip holes to connect the bottom plate to the sliding block.

[0053] A second through-hole column is also provided on the lower surface of the bottom plate, and a second screw is threadedly connected to the second through-hole column.

[0054] The shell comprises a U-shaped guide rail and a plastic upper shell which are made by bending sheet metal parts that are buckled together.

[0055] The main control PCBA is fixedly arranged on the plastic upper shell or the limit unit.

[0056] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the appended claims of the present invention.

Claims

1. A simple electric door closer slide structure, comprising a housing; The housing is provided with a door closing feedback unit, a limit unit, a main control PCBA and a sliding component, the main control PCBA is electrically connected to the door closing feedback unit and the limit unit, and the sliding component is slidably arranged at the bottom of the housing; It is characterized in that The sliding assembly includes a slider and a fixing screw assembly, wherein the slider is slidably arranged at the bottom of the housing, and the fixing screw assembly is fixedly arranged on the slider, and the relative position of the fixing screw assembly on the slider can be adjusted outside the housing; the housing includes a U-shaped guide rail and a plastic upper shell made by bending sheet metal parts that are buckled together; The fixing screw assembly includes an upper fixing plate, a lower fixing plate and a first screw, the sliding block is provided with a screw slot, the lower fixing plate is provided with a first through-hole column, the first screw passes through the first through-hole column, the lower fixing plate, the screw slot and the upper fixing plate in sequence from bottom to top, and the first screw is threadedly connected to the upper fixing plate; or, the fixing screw assembly includes a base plate, the base plate is provided with a strip hole, and the fixing screw passes through the strip hole to connect the base plate to the sliding block.

2. A simple electric door closer slideway structure according to claim 1, characterized in that: Sawtooth grooves are arranged on both sides of the screw slot of the sliding block, and limiting convex ridges are arranged on the upper fixing plate.

3. The simplified electric door closer slideway structure according to claim 1, characterized in that: Both ends of the sliding block are provided with inclined surfaces matched with the limiting blocks of the limiting unit.

4. The simplified electric door closer slideway structure according to claim 1, characterized in that: The lower fixing plate is also provided with a positioning boss which can penetrate into the screw groove of the sliding block.

5. The simplified electric door closer slideway structure according to claim 1, characterized in that: A second through-hole column is also provided on the lower surface of the bottom plate, and a second screw is threadedly connected to the second through-hole column.

6. The simplified electric door closer slideway structure according to claim 1, characterized in that: The main control PCBA is fixedly arranged on the plastic upper shell or the limiting unit.

7. A door closer, comprising an electric door closer slide groove structure, a connecting rod and a hydraulic body as described in any one of claims 1 to 6, one end of the connecting rod being hinged to the hydraulic body, and the other end of the connecting rod being hinged to a sliding assembly of the electric door closer slide groove structure.

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