CN109930936B

CN109930936B - Hydraulic door closer

Info

Publication number: CN109930936B
Application number: CN201910223468.XA
Authority: CN
Inventors: 陈招胜; 陆际泽
Original assignee: Oude Door Control Technology Co ltd
Current assignee: Oude Door Control Technology Co ltd
Priority date: 2019-03-22
Filing date: 2019-03-22
Publication date: 2020-09-22
Anticipated expiration: 2039-03-22
Also published as: CN109930936A

Abstract

The invention discloses a hydraulic door closer, which relates to the technical field of door closers and comprises a shell, a piston, a front end cover, a rear end cover, a cam, a first one-way valve, a second one-way valve, a first rotating wheel and a second rotating wheel, wherein a cavity filled with hydraulic oil is arranged in the shell, the piston is arranged in the cavity and is in sliding and sealing connection with the inner wall of the shell, a first cavity is formed between the piston and the front end cover, a second cavity is formed between the piston and the rear end cover, the cam is arranged between the first rotating wheel and the second rotating wheel and is respectively abutted against the circumferential surfaces of the first rotating wheel and the second rotating wheel, an arc-shaped slot is arranged on the cam, when the door is closed, the first rotating wheel is arranged in the arc-shaped slot, the second rotating wheel is abutted against the convex part of the cam, when the door is opened to the maximum corner, the first rotating wheel is abutted against one side edge of the cam boss, and the second rotating wheel is abutted against one side edge of the arc-shaped groove; the door opening and closing sound is light, and the use operability is improved.

Description

Hydraulic door closer

Technical Field

The invention relates to the technical field of door closers, in particular to a hydraulic door closer.

Background

Door closers have become popular in every area of society as an essential facility device for modern buildings. With the continuous development and progress of society, the national requirements on fire protection and security are higher and higher, and door closers are required to be installed on a plurality of passage doors and fire doors; the door closer is a hydraulic press similar to a spring on the door head, can be released after being compressed after the door is opened, automatically closes the door, has the effect like a spring door, and can ensure that the door is accurately and timely closed to an initial position after being opened.

The internal structure of the door closer is a secret world which can operate at any time and stably; also mounted with the door closer is an arm assembly which is connected by a door closer shaft on the door closer, which is currently a gear shaft, and which is rotated through the arm assembly in the door opening operation, and rotates a gear through the arm assembly to compress an inner spring at the time of opening and closing the door, resulting in a change of hydraulic oil.

However, the gear and the rack are matched to cause the following problems, the gear and the rack have larger door closing sound in the transmission process, the door is hard and labor-saving, and certain inadaptability is caused in the use process.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a hydraulic door closer which has the functions of making a door open and close with light sound and improving the use operability.

In order to achieve the purpose, the invention provides the following technical scheme:

a hydraulic door closer comprises a shell, wherein a cavity full of hydraulic oil is arranged in the shell, a piston is arranged in the cavity and is connected with the inner wall of the shell in a sliding and sealing manner, a front end cover and a rear end cover are respectively arranged at two ends of the cavity, a first cavity is formed between the piston and the front end cover, a second cavity is formed between the piston and the rear end cover, a first check valve used for enabling hydraulic oil in the first cavity to flow into the second cavity is arranged on the piston, a first through hole is formed in the first cavity, a second through hole is formed in the second cavity, a second check valve used for enabling hydraulic oil in the second cavity to flow into the first cavity is arranged between the first through hole and the second through hole, a cam used for connecting an arm assembly is arranged in the piston, and the cam is rotationally connected into the cavity, rotating on the piston and having first rotation wheel and second rotation wheel, the cam arrange rotate between the wheel in first rotation wheel and second and rotate the periphery of taking turns respectively with first rotation wheel and second inconsistent arc-shaped groove of being reserved on the cam when the door is closed, first rotation wheel is arranged in arc-shaped in-slot, the second rotate the wheel with the bellying of cam is contradicted, when the door is opened to the maximum corner, first rotation wheel contradicts in the side of cam bellying, the second rotates the wheel contradict in a side of arc-shaped groove.

When the door is closed, the first rotating wheel is arranged in the arc-shaped slot of the cam, and the second rotating wheel is abutted against the convex part of the cam and is in a static state; when the door is opened, the arm component drives the cam to rotate between the first rotating wheel and the second rotating wheel, the piston is enabled to slide in the cavity due to the eccentric arrangement between the rotating point and the cam, the piston slides towards the front end cover, the volume of the first cavity is gradually reduced, hydraulic oil in the first cavity flows into the second cavity through the first one-way valve, the effect of buffering when the door is opened is achieved, and the purpose of light sound when the door is opened and closed is achieved; when the door is opened to the maximum corner, the first rotating wheel abuts against the side edge of the cam boss, the second rotating wheel abuts against one side edge of the arc-shaped groove, and the piston abuts against the front end cover towards the end face of the first cavity; when the external force acting on the cam disappears, the first rotating wheel props against the side edge of the cam boss, the second rotating wheel props against the side edge of the arc-shaped relief groove, the cam is positioned between the first rotating wheel and the second rotating wheel under the action of unbalanced stress, the cam is enabled to rotate reversely gradually, hydraulic oil in the second cavity is conveyed into the first cavity through the second one-way valve between the first through hole and the second through hole, the piston is enabled to be positioned in the cavity and slide towards the direction of the rear end cover, and the arm component connected with the driving shaft is enabled to shrink gradually, so that the effect of automatically closing the door is achieved; the cam is positioned between the first rotating wheel and the second rotating wheel under the action of stress, so that the piston of the cam is positioned in the cavity to slide in a reciprocating manner, and the cam has the effects of light door opening and closing sound and improvement of the use operability of the cam under the action of the flow of hydraulic oil.

Further setting: the arc-shaped starved groove is located on the circle, and the diameter of the circle is larger than or equal to the diameter of the first rotating wheel.

So set up, when the door was closed, arrange in the arc of cam and strut in the groove through first rotating wheel, the second rotates the bellying of wheel and cam and contradicts, is in stable quiescent condition when making it close the door.

Further setting: the piston is internally provided with an installation cavity, the first rotating wheel, the second rotating wheel and the cam are uniformly arranged in the installation cavity, the first check valve is arranged on one end face of the piston, and the other end face of the piston is provided with an opening communicated with the installation cavity.

So set up, through rotating wheel, second and arranging wheel and cam in the installation cavity of piston, make it when the piston is in the motion of cavity, simultaneously through check valve and opening, make hydraulic oil be in the installation intracavity and flow, reach and rotate wheel and cam lubricated effect to first rotation wheel, second, improve its first rotation wheel, second and rotate the pivoted rotation performance of contradicting each other between wheel and the cam.

Further setting: offer the groove of stepping down that is linked together with the installation cavity on the circumference lateral wall of piston, cam body coupling has the pivot, the pivot arrange in the inslot of stepping down, just the pivot is rotated through the deep groove ball bearing that sets up in the cavity and is connected with the casing.

So set up, the pivot is in the cavity internal rotation through deep groove ball bearing to be in the reciprocating motion of the inslot of stepping down, realize the cam and act on between first rotating wheel and the second rotating wheel, make its piston reciprocating sliding in the effect in the cavity.

Further setting: and a bearing groove is formed in the inner wall of the cavity, and the deep groove ball bearing is arranged in the bearing groove.

So set up, set up in the bearing groove through with deep groove ball bearing, improve the effect that the cam is in cavity internal rotation stability.

Further setting: the installation groove has been seted up on the circumference lateral wall of casing the installation groove internal fixation is provided with the tooth axle lid, the cam is connected with the drive shaft, the drive shaft rotates and wears to locate the tooth axle lid.

So set up, through the mounting groove seal on the tooth shaft lid with the casing, make its drive shaft and arm subassembly be connected, realize being in the purpose of rotating between first rotating wheel and the second rotating wheel to the cam.

Further setting: and a first sealing ring is sleeved on the circumferential side wall of the gear shaft cover.

So set up, through first sealing washer improve the sealing performance between tooth shaft cover and the casing, improve the stability of hydraulic pressure door closer work.

Further setting: and the front end cover and the rear end cover are both sleeved with second sealing rings.

So set up, improve the sealing performance between front end housing, rear end cap and the casing through the second sealing washer, improve the stability of hydraulic pressure door closer work.

Further setting: the outer circumferential surface of the piston is provided with a plane part, and a buffer cavity is formed between the plane part and the cavity.

So set up, make through plane portion and form the cushion chamber between its and the cavity, when the piston was in the cavity and slides, reach certain space capacity compression effect through the cushion chamber, improve the piston and be in reciprocating sliding's in the cavity stability.

Further setting: the outer surface of the shell is provided with a clamping notch, and the side wall of the clamping notch is provided with a plurality of mounting lock holes.

So set up, through connect corresponding retaining member on the installation lockhole, make its joint notch be fixed in on corresponding carrier, reach the purpose to hydraulic pressure door closer installation.

Compared with the prior art, the invention has the following advantages by adopting the technical scheme:

1. when the door is opened to the maximum corner, the first rotating wheel abuts against the side edge of the cam boss, the second rotating wheel abuts against one side edge of the arc-shaped relief groove, the end face of the piston facing the first cavity abuts against the front end cover, the piston is positioned in the cavity to slide in a reciprocating manner under the action of the force applied between the first rotating wheel and the second rotating wheel by the cam, and the door opening and closing sound is light and the use operability of the door opening and closing sound is improved under the flowing action of hydraulic oil;

2. the first rotating wheel, the second rotating wheel and the cam are arranged in the mounting cavity of the piston, so that when the piston moves in the cavity, hydraulic oil flows in the mounting cavity through the one-way valve and the opening, the first rotating wheel, the second rotating wheel and the cam are lubricated, and the rotating performance of mutual interference rotation among the first rotating wheel, the second rotating wheel and the cam is improved;

3. the rotating shaft rotates in the cavity through the deep groove ball bearing and reciprocates in the abdicating groove, so that the cam acts between the first rotating wheel and the second rotating wheel, a piston of the cam slides in the cavity in a reciprocating manner, and the action of the cam on the rotation stability in the cavity is improved;

4. a buffer cavity is formed between the piston and the cavity through the plane part, and when the piston slides in the cavity, a certain space capacity compression effect is achieved through the buffer cavity, so that the reciprocating sliding stability of the piston in the cavity is improved;

5. through setting up first sealing washer, second sealing washer, improve the sealing performance between front end housing, rear end cap, tooth shaft cover and the casing, and then improve the stability of hydraulic pressure door closer work.

Drawings

FIG. 1 is a schematic structural diagram of a hydraulic door closer;

FIG. 2 is a cross-sectional view of the first check valve axis with the hydraulic door closer open at a maximum rotation angle;

FIG. 3 is a cross-sectional view on the axis of a first through hole in the hydraulic door closer;

FIG. 4 is a cross-sectional view on the axis of the cam shaft in the hydraulic door closer;

FIG. 5 is a schematic view of the piston in engagement with a camshaft;

FIG. 6 is a schematic structural diagram of a cam shaft in the hydraulic door closer;

fig. 7 is a structural sectional view of the hydraulic door closer in the closed state.

In the figure: 1. a housing; 11. a cavity; 12. a first cavity; 13. a second cavity; 14. a buffer chamber; 15. a bearing groove; 16. a first through hole; 17. a second through hole; 18. mounting grooves; 19. clamping the notch; 191. installing a lock hole; 2. a piston; 21. a mounting cavity; 22. a planar portion; 23. a pin shaft; 24. an opening; 25. a yielding groove; 3. a front end cover; 4. a rear end cap; 5. a camshaft; 51. a rotating shaft; 52. a cam; 521. an arc-shaped slot is reserved; 522. a boss portion; 53. a drive shaft; 54. a gear shaft cover; 6. a first rotating wheel; 7. a second rotating wheel; 8. a deep groove ball bearing; 9. a first check valve; 10. a second one-way valve.

Detailed Description

The hydraulic door closer is further explained with reference to the attached drawings.

A hydraulic door closer is shown in figures 1 and 2 and comprises a shell 1, a piston 2, a front end cover 3, a rear end cover 4, a first rotating wheel 6, a second rotating wheel 7 and a cam shaft 5 for connecting an arm assembly; the front end cover 3 and the rear end cover 4 are respectively arranged on two sides of the shell 1, and a cavity 11 for fully storing hydraulic oil is formed between the front end cover 3 and the shell 1; as shown in fig. 3, the piston 2 is disposed in the cavity 11 and is connected to the inner wall of the housing 1 in a sliding and sealing manner, such that a first cavity 12 is formed between the piston 2 and the front end cap 3, and a second cavity 13 is formed between the piston 2 and the rear end cap 4.

As shown in fig. 2, a mounting cavity 21 is formed in the piston 2, and the first rotating wheel 6 and the second rotating wheel 7 are rotatably arranged in the mounting cavity 21 through a pin 23 fixedly arranged in the mounting cavity 21; in order to facilitate the piston 2 to slide back and forth in the cavity 11, a plane portion 22 is formed on the outer circumferential surface of the piston 2, and a buffer chamber 14 is formed between the plane portion 22 and the cavity 11.

As shown in fig. 4 to 6, the camshaft 5 includes a rotating shaft 51, a cam 52, and a driving shaft 53 for connecting the arm assembly, which are integrally provided in this order; a bearing groove 15 is formed on the inner wall of the cavity 11, a deep groove ball bearing 8 is arranged in the bearing groove 15, and the rotating shaft 51 rotates in the cavity 11 through the deep groove ball bearing 8.

As shown in fig. 4 to 6, the cam 52 is disposed between the first rotating wheel 6 and the second rotating wheel 7 and interferes with the circumferential surfaces of the first rotating wheel 6 and the second rotating wheel 7, respectively; an arc-shaped relief groove 521 is formed in the circumferential side wall of the cam 52, and the diameter of a circle where the arc-shaped relief groove 521 is located is larger than or equal to the diameter of the first rotating wheel 6; as shown in fig. 7, when the door is closed, the circumferential surface of the first rotating wheel 6 is placed in the arc-shaped relief groove 521, and the circumferential surface of the second rotating wheel 7 is abutted against the protrusion 522 of the cam 52; referring to fig. 2, when the door is opened to the maximum rotation angle, the side edge of the convex portion 522 of the cam 52 abuts against the circumferential surface of the first rotating wheel 6, and the side edge of the arc-shaped relief groove 521 abuts against the circumferential surface of the second rotating wheel 7.

As shown in fig. 4 to fig. 6, two end faces of the piston 2 are both provided with openings 24, and the opening 24 of the piston 2 facing the front end cover 3 is fixedly provided with a first check valve 9 for flowing the hydraulic oil in the first cavity 12 into the second cavity 13; a first through hole 16 is formed in the first cavity 12, a second through hole 17 is formed in the second cavity 13, and the second through hole 17 is communicated with the mounting cavity 21; meanwhile, a second check valve 10 for flowing the hydraulic oil in the second cavity 13 into the first cavity 12 is provided between the first through hole 16 and the second through hole 17.

Referring to fig. 5 and 6, the circumferential side wall of the piston 2 is symmetrically provided with relief grooves 25 communicated with the mounting cavity 21, and the rotating shaft 51 and the driving shaft 53 are respectively arranged in the relief grooves 25 at both sides; as shown in fig. 4, an installation groove 18 is formed in the side wall of the housing 1, a gear cover 54 is fixedly disposed in the installation groove 18, and the driving shaft 53 rotates and penetrates the gear cover 54.

In order to improve the sealing performance of the hydraulic oil in the cavity 11, the circumferential side walls of the gear shaft cover 54 are respectively sleeved with a first sealing ring, and the front end cover 3 and the rear end cover 4 are respectively sleeved with a second sealing ring, so that the sealing performance of the fixed connection between the front end cover 3 and the shell 1 is realized.

As shown in fig. 4, in order to improve the installation of the housing 1 on the carrier, a clamping notch 19 is formed in the outer surface of the housing 1, a plurality of installation locking holes 191 are formed in the side wall of the clamping notch 19, and the housing 1 is fixedly installed on the carrier by passing through the installation locking holes 191 through corresponding fixing members.

The working principle is as follows: when the door is closed, the first rotating wheel 6 is placed in the arc-shaped gas-relief groove 521 of the cam 52, and the second rotating wheel 7 is abutted against the convex part 522 of the cam 52 and is in a static state; when the door is opened, the arm component drives the camshaft 5 to rotate, so that the cam 52 of the camshaft is positioned between the first rotating wheel 6 and the second rotating wheel 7 to rotate, the rotating shaft 51 is eccentrically arranged on the cam 52, the piston 2 is enabled to be positioned in the cavity 11 to slide, the piston 2 slides towards the front end cover 3, the volume of the first cavity 12 is gradually reduced, hydraulic oil in the first cavity 12 firstly flows into the mounting cavity 21 through the first one-way valve 9 and then flows into the second cavity 13 through the opening 24 on the piston 2, the buffering effect during door opening is achieved, and the door opening and closing sound is light; when the door is opened to the maximum rotation angle, the first rotating wheel 6 abuts against the side edge of the convex part 522 of the cam 52, the second rotating wheel 7 abuts against one side edge of the arc-shaped relief groove 521, and the end surface of the piston 2 facing the first cavity 12 abuts against the front end cover 3; when the external force applied to the camshaft 5 disappears, the first rotating wheel 6 abuts against the side edge of the convex part 522 of the cam 52, the second rotating wheel 7 abuts against one side edge of the arc-shaped relief slot 521, so that the cam 52 is positioned between the first rotating wheel 6 and the second rotating wheel 7 under the unbalanced stress action, the cam 52 is enabled to gradually rotate reversely, the hydraulic oil in the second cavity 13 is conveyed into the first cavity 12 through the second one-way valve 10 between the first through hole 16 and the second through hole 17, the piston 2 is enabled to be positioned in the cavity 11 and slide towards the direction of the rear end cover 4, and the arm component connected with the driving shaft 53 is enabled to gradually contract, so that the effect of automatically closing the door is achieved; the cam 52 is positioned between the first rotating wheel 6 and the second rotating wheel 7 under the action of stress, so that the piston 2 is positioned in the cavity 11 to slide in a reciprocating manner, and the door opening and closing sound is light under the action of the flowing of hydraulic oil, and the use operability of the door opening and closing device is improved.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.

Claims

1. A hydraulic door closer comprises a shell (1), and is characterized in that: be provided with cavity (11) that store up full hydraulic oil in casing (1) be provided with piston (2) in cavity (11), just piston (2) with casing (1) inner wall sliding seal connects the both ends of cavity (11) are provided with front end housing (3) and rear end cap (4) respectively, be formed with first cavity (12) between piston (2) and front end cap (3), be formed with second cavity (13) between piston (2) and rear end cap (4) be provided with on piston (2) and be used for first check valve (9) in first cavity (12) interior hydraulic oil stream to second cavity (13) first through-hole (16) have been seted up on first cavity (12) second through-hole (17) have been seted up on second cavity (13), be provided with between first through-hole (16) and second through-hole (17) and be used for flowing the second cavity (13) interior hydraulic oil to the second cavity (12) in the second cavity (13) second through-hole (17) The first check valve (9) is arranged on one end face of the piston (2), and an opening (24) communicated with the mounting cavity (21) is formed in the other end face of the piston (2); a cam (52) for connecting the arm assembly is arranged in the piston (2), and the cam (52) is rotatably connected in the cavity (11), a first rotating wheel (6) and a second rotating wheel (7) are arranged on the piston (2) in a rotating way, the cam (52) is arranged between the first rotating wheel (6) and the second rotating wheel (7) and respectively pushes against the circumferential surfaces of the first rotating wheel (6) and the second rotating wheel (7), an arc-shaped relief groove (521) is formed on the cam (52), and when the door is closed, the first rotating wheel (6) is arranged in the arc-shaped starved groove (521), the second rotating wheel (7) is abutted against the convex part (522) of the cam (52), when the door is opened to the maximum rotation angle, the first rotating wheel (6) is abutted against the side edge of the convex part (522) of the cam (52), the second rotating wheel (7) abuts against one side edge of the arc-shaped starving groove (521); an installation cavity (21) is formed in the piston (2), and the first rotating wheel (6), the second rotating wheel (7) and the cam (52) are uniformly arranged in the installation cavity (21).

2. The hydraulic door closer of claim 1, wherein: the arc-shaped relief groove (521) is located on a circle with a diameter larger than or equal to the diameter of the first rotating wheel (6).

3. The hydraulic door closer of claim 1, wherein: offer groove of stepping down (25) that is linked together with installation cavity (21) on the circumference lateral wall of piston (2), cam (52) an organic whole is connected with pivot (51), pivot (51) arrange in groove of stepping down (25), just pivot (51) are connected with casing (1) rotation through setting up deep groove ball bearing (8) in cavity (11).

4. The hydraulic door closer of claim 3, wherein: and a bearing groove (15) is formed in the inner wall of the cavity (11), and the deep groove ball bearing (8) is arranged in the bearing groove (15).

5. The hydraulic door closer of claim 1, wherein: the side wall of the circumference of the shell (1) is provided with an installation groove (18), a gear shaft cover (54) is fixedly arranged in the installation groove (18), the cam (52) is connected with a driving shaft (53), and the driving shaft (53) rotates and penetrates through the gear shaft cover (54).

6. The hydraulic door closer of claim 5, wherein: and a first sealing ring is sleeved on the circumferential side wall of the gear shaft cover (54).

7. The hydraulic door closer of claim 1, wherein: and the front end cover (3) and the rear end cover (4) are respectively sleeved with a second sealing ring.

8. The hydraulic door closer of claim 1, wherein: the outer circumferential surface of the piston (2) is provided with a plane part (22), and a buffer cavity (14) is formed between the plane part (22) and the cavity (11).

9. The hydraulic door closer of claim 1, wherein: the outer surface of the shell (1) is provided with a clamping notch (19), and the side wall of the clamping notch (19) is provided with a plurality of mounting lock holes (191).