CN209924725U - Hydraulic door closer - Google Patents

Abstract

The utility model discloses a hydraulic pressure door closer relates to door closer technical field, which comprises a housin, a piston, the front end housing, the rear end cap, a cam, a check valve, return spring, first rotation wheel and second rotation wheel, be provided with the cavity that stores up hydraulic oil in the casing, the piston sets up in the cavity and with shells inner wall sliding seal connection, be formed with first cavity between piston and the front end housing, be formed with the second cavity between piston and the rear end cap, the cam arranges between first rotation wheel and second rotation wheel, and respectively with the periphery of first rotation wheel and second rotation wheel inconsistent, arc edge groove has been seted up on the cam, when the door was closed, first rotation wheel was arranged in the arc edge groove, the second rotation wheel was contradicted with the bellying of cam, return spring's both ends are contradicted with the terminal surface of rear end housing and piston respectively; the door opening and closing sound is light, and the use operability is improved.

Description

Hydraulic door closer

Technical Field

The utility model relates to a door closer technical field, more specifically say, it relates to a hydraulic pressure 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.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims to provide a hydraulic pressure door closer has the switch door sound light, improves its effect of using the operability.

In order to achieve the above purpose, the utility model provides a 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, the first through hole is communicated with the second through hole, a cam used for connecting an arm assembly is arranged in the piston and is rotationally connected into the cavity, and a first rotating wheel and a second rotating wheel are rotationally arranged on the piston, the cam arranges that it is inconsistent in first rotation wheel and second rotation wheel between, and rotate the periphery of wheel with first rotation wheel and second respectively arc-shaped groove of being in order has been seted up on the cam, when the door was closed, first rotation wheel was arranged in arc-shaped groove of being in order, the second rotate the wheel with the bellying of cam is contradicted be provided with return spring in the second cavity, just return spring's both ends are contradicted with a terminal surface of rear end cap and piston respectively and are contradicted

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 end face of the piston facing the first cavity is abutted against the front end cover, and the return spring is in a stretching state; when the external force acting on the cam disappears, the piston is pulled to return under the action of a return spring between the piston and the shell, so that the cam is enabled to rotate reversely gradually, hydraulic oil in the second cavity is conveyed into the first cavity through 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, the arm component connected with the driving shaft of the piston is enabled to contract gradually, and the effect of automatically closing the door is achieved; the piston of the cam is positioned between the first rotating wheel and the second rotating wheel under the action of stress and under the action of the return spring, and slides in a reciprocating manner in the cavity, and the cam has the advantages of being light in door opening and closing sound and improving the use operability under the action of flowing 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.

Through arranging first rotating wheel, second rotating 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 the lubricated effect of first rotating wheel, second rotating wheel and cam, improve the rotational performance of mutual conflict rotation between its first rotating wheel, second rotating 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 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.

By adopting the technical scheme, the utility model discloses relative prior art compares, has following advantage:

1. when the door is opened to the maximum rotation angle, the end face of the piston facing the first cavity is abutted against the front end cover, the piston is positioned in the cavity to slide in a reciprocating manner under the stress action of the cam between the first rotating wheel and the second rotating wheel and the return action of the return spring, and the door has the advantages of light sound when being opened and closed and improvement of the use operability through 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. 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. and a return spring.

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; the piston 2 is arranged in the cavity 11 and is connected with the inner wall of the shell 1 in a sliding and sealing mode, a first cavity 12 is formed between the piston 2 and the front end cover 3, and a second cavity 13 is formed between the piston 2 and the rear end cover 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; a return spring 10 is arranged in the second cavity 13, and two ends of the return spring 10 respectively abut against the rear end cover 4 and one end face of the piston 2.

Referring to fig. 2 to 4, when the door is opened to the maximum rotation angle, the return spring 10 is in a stretching state, and when the external force acting on the cam 52 disappears, the return spring 10 between the piston 2 and the housing 1 pulls the piston 2 to return, so that the cam 52 gradually rotates reversely, the hydraulic oil in the second cavity 13 is conveyed into the first cavity 12 through the space between the first through hole 16 and the second through hole 17, so that the piston 2 is in the cavity 11 and slides towards the rear end cover 4, and the arm assembly connected with the driving shaft 53 is gradually contracted, thereby achieving the effect of automatically closing the door.

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 a mounting cavity 21.

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; the circumferential side wall of the housing 1 is provided with an installation groove 18, a gear shaft cover 54 is fixedly arranged in the installation groove 18, and the driving shaft 53 rotates and penetrates through the gear shaft 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 end surface of the piston 2 facing the first cavity 12 is abutted against the front end cover 3, and the return spring 10 is in a stretching state; when the external force acting on the camshaft 5 disappears, the piston 2 is pulled to return under the action of the return spring 10 between the piston 2 and the shell 1, the cam 52 is enabled to gradually rotate reversely, hydraulic oil in the second cavity 13 is conveyed into the first cavity 12 through the space 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 piston 2 is positioned in the cavity 11 to slide in a reciprocating way under the action of the stress between the first rotating wheel 6 and the second rotating wheel 7 of the cam 52 and the action of the return spring 10, and the door opening and closing sound is light and the use operability is improved under the flowing action of hydraulic oil.

It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (9)

1. A hydraulic door closer comprises a shell (1), and is characterized in that: the hydraulic oil pump is characterized in that a cavity (11) full of hydraulic oil is arranged in the shell (1), a piston (2) is arranged in the cavity (11), the piston (2) is connected with the inner wall of the shell (1) in a sliding and sealing manner, a front end cover (3) and a rear end cover (4) are respectively arranged at two ends of the cavity (11), a first cavity (12) is formed between the piston (2) and the front end cover (3), a second cavity (13) is formed between the piston (2) and the rear end cover (4), a first check valve (9) used for flowing hydraulic oil in the first cavity (12) into the second cavity (13) is arranged on the piston (2), 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 first through hole (16) is communicated with the second through hole (17), 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), and a return spring (10) is arranged in the second cavity (13), and two ends of the return spring (10) are respectively abutted against one end face of the rear end cover (4) and one end face of the piston (2).

2. A hydraulic door closer according to 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. A hydraulic door closer according to claim 1, wherein: seted up installation cavity (21) in piston (2), first rotation wheel (6), second rotation wheel (7) and cam (52) equipartition are arranged in installation cavity (21), first check valve (9) set up on one end face of piston (2) set up the through-hole that is linked together with installation cavity (21) on another terminal surface of piston (2).

4. A hydraulic door closer according to claim 3, 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).

5. A hydraulic door closer according to claim 4, 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).

6. A hydraulic door closer according to 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).

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

8. A hydraulic door closer according to claim 1, wherein: and the front end cover (3) and the rear end cover (4) are respectively sleeved with a second sealing ring.

9. A hydraulic door closer according to 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).

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