CN218991287U

CN218991287U - Door closer

Info

Publication number: CN218991287U
Application number: CN202223276257.9U
Authority: CN
Inventors: 张飞飞; 赖明亮
Original assignee: Ningbo Pentagon Damper Corp
Current assignee: Ningbo Pentagon Damper Corp
Priority date: 2022-12-07
Filing date: 2022-12-07
Publication date: 2023-05-09
Anticipated expiration: 2032-12-07

Abstract

The utility model provides a door closer, which comprises a shell, an elastic telescopic piece and a guide driving seat, wherein an eccentric piece for transmission is rotatably arranged in the shell; the elastic telescopic piece is positioned in the shell, one end of the elastic telescopic piece is hinged with the shell, and the other end of the elastic telescopic piece is hinged with the eccentric piece; a rotating arm is arranged on the outer side of the shell, one end of the rotating arm is connected with the eccentric part, and the other end of the rotating arm extends towards the guide driving seat; the guide driving seat is provided with a guide chute for the end part of the rotating arm to enter and slide; when the door is closed, the end part of the rotating arm slides along the guide chute, and the rotating arm drives the elastic telescopic piece to swing through the eccentric piece, so that the elastic telescopic piece is stretched/compressed to generate damping; the door closer provided by the utility model overcomes the defects of complex structure, more parts and high manufacturing cost of the existing door closer.

Description

Door closer

Technical Field

The utility model relates to the field of auxiliary devices for opening and closing doors and windows, in particular to a door closer.

Background

The door closer is a device designed for assisting the opening and closing actions of doors and windows; the door closer has the significance of automatically closing the door, protecting the door frame and the door body (stably closing), and being used in business and public buildings, the door closer enables the door to be automatically closed so as to limit the spread of fire and ventilation in a building. In addition, door closers are increasingly being used by people in their home lives.

As disclosed in patent No. CN110566073a, the force application mechanism of the door closer comprises a linkage component and a working component, both ends of the working component are respectively provided with a first fixed end and a second fixed end, the linkage component comprises a cam, the cam is installed in a box body, and the periphery of the cam is provided with a hinge hole for hinging a transmission rod; when in use, the transmission rod carries out push-pull action on the acting component through the rotation transmission of the cam; because the acting component is fixed, the transmission rod is required to be adopted for transmission, and the first fixed end, the second fixed end and other components are required to be arranged on two sides of the acting component, the whole structure is complex, the number of parts is large, the structure is not compact, the volume is large, and the manufacturing cost is high.

Disclosure of Invention

First, the technical problem to be solved

The utility model aims to solve the problem of providing a door closer which overcomes the defects of complex structure, more parts and high manufacturing cost of the existing door closer.

(II) technical scheme

In order to solve the technical problems, the utility model provides a door closer which comprises a shell, an elastic telescopic piece and a guide driving seat, wherein an eccentric piece for transmission is rotatably arranged in the shell; the elastic telescopic piece is positioned in the shell, one end of the elastic telescopic piece is hinged with the shell, and the other end of the elastic telescopic piece is hinged with the eccentric piece; a rotating arm is arranged on the outer side of the shell, one end of the rotating arm is connected with the eccentric part, and the other end of the rotating arm extends towards the guide driving seat; the guide driving seat is provided with a guide chute for the end part of the rotating arm to enter and slide; when the door is closed, the end part of the rotating arm slides along the guide chute, and the rotating arm drives the elastic telescopic piece to swing through the eccentric piece, so that the elastic telescopic piece stretches/compresses to generate damping. The door closer omits the traditional transmission rod, the first fixed end, the second fixed end and other parts, has higher transmission efficiency, better use effect, simplified structure, simpler structure, fewer parts, more compact structure, smaller volume and low manufacturing cost.

Further, the elastic telescopic piece is a gas spring or a hydraulic telescopic rod.

Further, the elastic expansion piece comprises a hydraulic cylinder and a piston assembly which is slidably arranged in the hydraulic cylinder, a front end cover and a rear end cover are respectively fixed on two sides of the hydraulic cylinder, the rear end cover is hinged with the shell, and one end of the piston assembly penetrates through the front end cover and then is hinged with the eccentric piece. And one side of the eccentric part, which faces the elastic telescopic part, is provided with an eccentric part, and one end of the piston assembly is hinged with the eccentric part.

Further, the piston assembly comprises a piston, a piston rod and a transmission head which are sequentially and fixedly connected, connecting lugs are symmetrically arranged on the transmission head, and the eccentric part is hinged between the two connecting lugs. The hydraulic cylinder is divided into a cavity I and a cavity II by the piston, damping media in a fluid form are filled in the cavity I and the cavity II, the piston is provided with an end part I and an end part II which are respectively corresponding to the cavity I and the cavity II, and the diameter of the piston is smaller than the inner diameter of the hydraulic cylinder so that a gap is reserved between the outer wall of the piston and the inner wall of the hydraulic cylinder.

Further, the piston is provided with at least one backflow channel which is communicated with the cavity I and the cavity II, an annular groove is concavely formed between the end I and the end II, a flow blocking ring is slidably arranged in the annular groove, and a plurality of flow discharging grooves which are communicated with the annular groove are annularly and equidistantly arranged on the end I; when the baffle ring slides to be close to one of the end portions, the baffle ring blocks a gap between the end portion and the hydraulic cylinder.

Further, the housing comprises a first housing and a second housing which are fixed with each other, the eccentric member is rotatably installed between the first housing and the second housing, and one end of the eccentric member penetrates through the first housing and then is connected with the rotating arm.

Further, one end of the rotating arm is provided with a guide post matched with the guide chute, and a roller is arranged on the guide post. And a limiting boss for limiting the eccentric part is arranged in the shell, and when the eccentric part is propped against the limiting boss, the guide pillar is positioned at the inlet of the guide chute.

(III) beneficial effects

According to the door closer provided by the utility model, one end of the elastic telescopic part is hinged with the shell, the other end of the elastic telescopic part is directly hinged with the eccentric part, and the rotating arm drives the elastic telescopic part to swing through the eccentric part when the door is closed, so that the elastic telescopic part stretches to generate damping, the structure omits the traditional transmission rod, the first fixed end, the second fixed end and other parts while realizing the same function, the transmission efficiency is higher, the use effect is better, the structure is simplified, the structure is simpler, the parts are fewer, the structure is more compact, the volume is smaller, and the manufacturing cost is low; overcomes the defects of complex structure, more parts and high manufacturing cost of the existing door closer.

Drawings

FIG. 1 is a perspective view of a door closer according to the present utility model;

FIG. 2 is a perspective view of a door closer guide drive seat according to the present utility model;

FIG. 3 is an exploded view of a door closer according to the present utility model;

FIG. 4 is a perspective view of the door closer of the present utility model with the second housing removed;

FIG. 5 is an exploded view of an elastic expansion element of a door closer according to the present utility model;

FIG. 6 is a cross-sectional view of a door closer elastic telescoping member of the present utility model;

FIG. 7 is a perspective view of a door closer piston assembly of the present utility model;

FIG. 8 is an exploded view of a door closer piston assembly of the present utility model;

FIG. 9 is a schematic illustration of a door closer piston assembly according to the present utility model;

FIG. 10 is a perspective view of a door closer door in a closed condition according to the present utility model;

the corresponding component names for each reference number in the figures are: 1. a housing; 101. a first housing; 102. a second housing; 103. a limit boss; 2. an elastic expansion piece; 21. a hydraulic cylinder; 22. a piston assembly; 23. a front end cover; 24. a rear end cover; 25. a flow blocking ring; 211. a cavity I; 212. a cavity II; 221. a piston; 222. a piston rod; 223. a transmission head; 224. a connecting lug; 225. an end I; 226. an end II; 227. a return passage; 228. an annular groove; 229. a drainage groove; 3. a guide driving seat; 301. a guide chute; 4. an eccentric member; 401. a eccentric portion; 5. a rotating arm; 501. a guide post; 502. and a roller.

Detailed Description

The following describes in further detail the embodiments of the present utility model with reference to the drawings and examples. The following examples are illustrative of the utility model and are not intended to limit the scope of the utility model.

Referring to fig. 1 to 10, the present utility model provides a door closer, which comprises a housing 1 for accommodating an elastic telescopic member 2, the elastic telescopic member 2 and a guide driving seat 3, wherein the housing 1 and the guide driving seat 3 are mounted on one of a door frame and a door body, and the housing 1 and the guide driving seat 3 are connected through a rotating arm 5.

Referring to fig. 3 and 4, the inside of the housing 1 is rotatably mounted with an eccentric 4 for transmission; the elastic telescopic piece 2 is positioned in the shell 1, one end of the elastic telescopic piece 2 is hinged with the shell 1, and the other end of the elastic telescopic piece 2 is hinged with the eccentric piece 4; the two ends of the elastic telescopic piece 2 are hinged with the eccentric piece 4 and the shell respectively, and the elastic telescopic piece 2 can swing through the transmission of the eccentric piece 4 when the door is closed, so that the elastic telescopic piece 2 stretches to generate damping, the structure is simpler and parts are fewer while the same function is ensured. A rotating arm 5 is arranged on the outer side of the shell 1, one end of the rotating arm 5 is connected with the eccentric part 4, and the rotating arm 5 can drive the eccentric part 4 to rotate. The other end of the rotating arm 5 extends towards the guide driving seat 3; the guide driving seat 3 is provided with a guide chute 301 for the end part of the rotating arm 5 to enter and slide, and one side of the guide chute 301 is provided with an inlet; when the door is closed, the rotating arm 5 is rotated by the guide chute 301.

The elastic telescopic member 2 may be a gas spring or a hydraulic telescopic rod. Referring to fig. 3 to 7, in this embodiment, a hydraulic telescopic rod is preferable; the elastic telescopic member 2 comprises a hydraulic cylinder 21 and a piston assembly 22 slidably mounted in the hydraulic cylinder 21, a front end cover 23 and a rear end cover 24 are respectively fixed on two sides of the hydraulic cylinder 21, the rear end cover 24 is hinged with the shell 1, and one end of the piston assembly 22 penetrates through the front end cover 23 and then is hinged with the eccentric member 4. The eccentric part 4 is provided with an eccentric part 401 on a side facing the elastic expansion member 2, and one end of the piston assembly 22 is hinged with the eccentric part 401. The piston assembly 22 comprises a piston 221, a piston rod 222 and a transmission head 223 which are fixedly connected in sequence, the transmission head 223 is symmetrically provided with connecting lugs 224, and an eccentric part 401 is hinged between the two connecting lugs 224.

Referring to fig. 1 to 4, the housing 1 includes a first housing 101 and a second housing 102 fixed to each other, and the eccentric 4 is rotatably installed between the first housing 101 and the second housing 102, and one end of the eccentric 4 passes through the first housing 101 and is connected to the rotating arm 5. One end of the rotating arm 5 is provided with a guide pillar 501 matched with the guide chute 301, and the guide pillar 501 is provided with a roller 502 to reduce friction force; a limit boss 103 for limiting the eccentric member 4 is arranged in the housing 1, and when the eccentric member 4 abuts against the limit boss 103, a guide pillar 501 is positioned at the inlet of the guide chute 301.

Referring to fig. 6 to 9, the piston 221 divides the hydraulic cylinder 21 into a cavity I211 and a cavity ii 212, and the cavity I211 and the cavity ii 212 are filled with a damping medium in a fluid form, which may be hydraulic oil. The piston 221 has an end I225 and an end ii 226 corresponding to the chamber I211 and the chamber ii 212, respectively, and the diameter of the piston 221 is smaller than the inner diameter of the hydraulic cylinder 21 so that a gap is provided between the outer wall of the piston 221 and the inner wall of the hydraulic cylinder 21 for the passage of damping medium.

Referring to fig. 8 and 9, the piston 221 is provided with at least one return channel 227 communicating with the cavity I211 and the cavity ii 212, and the return channel 227 is used for the damping medium communication between the two cavities. An annular groove 228 is concavely formed between the end part I225 and the end part II 226, a flow blocking ring 25 is slidably arranged in the annular groove 228, and a plurality of flow discharging grooves 229 communicated with the annular groove 228 are annularly and equally arranged on the end part I225; when the piston moves, the flow blocking ring 25 moves in the annular groove 228 due to the viscous action of hydraulic oil, and when the piston continuously moves to enable the flow blocking ring 25 to slide along the annular groove 228 to a side close to one end of the piston, the outer annular wall of the flow blocking ring 25 blocks the gap between the end and the hydraulic cylinder 21, so that the gap circulation of the hydraulic oil is blocked; the flow rate of the drain tank 229 per unit time is greater than the flow rate of the return channel 227.

Referring to fig. 6, when the door is closed, the end of the rotating arm 5 slides along the guiding chute 301, and the rotating arm 5 drives the elastic telescopic member 2 to swing through the eccentric member 4, so that the elastic telescopic member 2 is extended; the piston 221 moves towards the cavity I211, and the baffle ring 25 abuts against the end ii 226 to block the hydraulic oil from flowing in the gap; at this time, the hydraulic oil in the cavity I211 cannot enter the cavity ii 212 through the drainage groove 229, and can only slowly enter the cavity ii 212 through the backflow channel 227, thereby forming hydraulic resistance and achieving the effect of slowly closing the door. When the door is opened, the rotating arm 5 rotates reversely, the elastic telescopic piece 2 compresses, the piston 221 moves towards the cavity II 212, and the flow blocking ring 25 is abutted against the end I225 to block the hydraulic oil from flowing in a gap at the position; at this time, the hydraulic oil in the cavity ii 212 may flow through the gap between the drain groove 229 and the end portion ii 226 and enter the cavity I211 through the return channel 227, and the flow of the hydraulic oil is sufficiently large, so that the resistance of the door opening is small, and along with the rotation of the door, one end of the rotating arm 5 slides to the position of the inlet of the guide chute.

The embodiment provides a door closer, with the one end of elastic expansion piece with the casing articulated, with its other end direct with the eccentric part articulated, the rotating arm drives the elastic expansion piece through the eccentric part and swings when closing the door to make the elastic expansion piece extension produce the damping, this structure has saved parts such as traditional transfer line, first stiff end and second stiff end when realizing the same function, transmission efficiency is higher, and the result of use is better, has simplified the structure, and the structure is simpler, and spare part is fewer, and the structure is compacter, and is smaller, low in manufacturing cost.

The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that it will be apparent to those skilled in the art that several modifications and variations can be made without departing from the technical principle of the present utility model, and these modifications and variations should also be regarded as the scope of the utility model.

Claims

1. A door closer, characterized in that: the device comprises a shell (1), an elastic telescopic piece (2) and a guide driving seat (3), wherein an eccentric piece (4) for transmission is rotatably arranged in the shell (1); the elastic telescopic piece (2) is positioned in the shell (1), one end of the elastic telescopic piece is hinged with the shell (1), and the other end of the elastic telescopic piece is hinged with the eccentric piece (4); a rotating arm (5) is arranged on the outer side of the shell (1), one end of the rotating arm (5) is connected with the eccentric part (4), and the other end of the rotating arm extends towards the guide driving seat (3); a guide chute (301) for allowing the end part of the rotating arm (5) to enter and slide is arranged on the guide driving seat (3); when the door is closed, the end part of the rotating arm (5) slides along the guide chute (301), the rotating arm (5) drives the elastic telescopic piece (2) to swing through the eccentric piece (4), and meanwhile, the elastic telescopic piece (2) stretches/compresses to generate damping.

2. A door closer as claimed in claim 1, wherein: the elastic telescopic piece (2) is a gas spring or a hydraulic telescopic rod.

3. A door closer as claimed in claim 1, wherein: the elastic telescopic component (2) comprises a hydraulic cylinder (21) and a piston component (22) which is slidably arranged in the hydraulic cylinder (21), a front end cover (23) and a rear end cover (24) are respectively fixed on two sides of the hydraulic cylinder (21), the rear end cover (24) is hinged with the shell (1), and one end of the piston component (22) penetrates through the front end cover (23) and then is hinged with the eccentric component (4).

4. A door closer as claimed in claim 3, wherein: an eccentric part (401) is arranged on one side, facing the elastic telescopic part (2), of the eccentric part (4), and one end of the piston assembly (22) is hinged with the eccentric part (401).

5. The door closer of claim 4, wherein: the piston assembly (22) comprises a piston (221), a piston rod (222) and a transmission head (223) which are sequentially and fixedly connected, connecting lugs (224) are symmetrically arranged on the transmission head (223), and the eccentric part (401) is hinged between the two connecting lugs (224).

6. The door closer of claim 5, wherein: the piston (221) divides the hydraulic cylinder (21) into a cavity I (211) and a cavity II (212), damping media in a fluid form are filled in the cavity I (211) and the cavity II (212), the piston (221) is provided with an end I (225) and an end II (226) which correspond to the cavity I (211) and the cavity II (212) respectively, and the diameter of the piston (221) is smaller than the inner diameter of the hydraulic cylinder (21) so that a gap is reserved between the outer wall of the piston (221) and the inner wall of the hydraulic cylinder (21).

7. The door closer of claim 6, wherein: the piston (221) is provided with at least one backflow channel (227) which is communicated with the cavity I (211) and the cavity II (212), an annular groove (228) is concavely formed between the end part I (225) and the end part II (226), a flow blocking ring (25) is slidably arranged in the annular groove (228), and a plurality of flow leaking grooves (229) which are communicated with the annular groove (228) are annularly and equidistantly arranged on the end part I (225); when the baffle ring (25) slides to be close to one of the end portions, the baffle ring (25) blocks a gap between the end portion and the hydraulic cylinder (21).

8. A door closer as claimed in claim 1, wherein: the shell (1) comprises a first shell (101) and a second shell (102) which are fixed with each other, the eccentric part (4) is rotatably arranged between the first shell (101) and the second shell (102), and one end of the eccentric part (4) passes through the first shell (101) and then is connected with the rotating arm (5).

9. A door closer as claimed in claim 1, wherein: one end of the rotating arm (5) is provided with a guide pillar (501) matched with the guide chute (301), and a roller (502) is arranged on the guide pillar (501).

10. The door closer of claim 9, wherein: a limiting boss (103) for limiting the eccentric part (4) is arranged in the shell (1), and when the eccentric part (4) abuts against the limiting boss (103), the guide pillar (501) is located at the inlet of the guide chute (301).