CN111255326B

CN111255326B - Door closer

Info

Publication number: CN111255326B
Application number: CN202010047857.4A
Authority: CN
Inventors: 陈志红; 魏俊锦
Original assignee: Guangzhou Teboneng Door Control Co ltd
Current assignee: Guangdong Teboning Hardware Manufacturing Co.,Ltd.
Priority date: 2020-01-16
Filing date: 2020-01-16
Publication date: 2021-08-27
Anticipated expiration: 2040-01-16
Also published as: CN111255326A

Abstract

The invention discloses a door closer, comprising: a housing; the transmission cam shaft is pivoted in the shell, and the axial direction of the transmission cam shaft is vertical to the extension direction of the shell; the link arm, one end of the said link arm is connected with said drive cam shaft, the said link arm can drive the said drive cam shaft to rotate; the sliding rail assembly can be arranged on a door leaf and is connected with the other end of the connecting arm; the front piston assembly and the rear piston assembly are arranged in the shell and are respectively positioned at the front side and the rear side of the transmission cam shaft, and the front piston assembly is connected with the rear piston assembly; the transmission cam shaft can push the rear piston assembly and the front piston assembly to retreat; the rear piston assembly and the front piston assembly can automatically return and drive the transmission cam shaft to rotate.

Description

Door closer

Technical Field

The present invention relates to a door closer.

Background

Compared with the sliding rail door closer with the traditional gear rack structure, the sliding rail door closer with the cam transmission structure has the advantages that the door is opened very easily, and the door is closed very powerfully when the sliding rail door closer with the cam transmission structure is used, so that the door closer with the cam transmission structure has better service performance compared with the traditional gear rack door closer.

The door closer with the cam transmission structure has small resistance and easy door opening, can be opened by old people, children, handicapped people and the like, and can be suitable for door installation and use in special occasions such as barrier-free passages, and therefore, the door closer with the cam transmission structure has a wider application range.

At present, most pistons of a door closer with a cam structure are composed of a front end piston and a rear end piston, in order to enable the front end piston to move close to a transmission cam shaft along with the rotation of the transmission cam shaft when the door is opened, a pushing spring is generally added in front of the front end piston to push the front end piston to move along with the transmission cam shaft, when the door is automatically closed, a main driving spring releases kinetic energy compressed when the door is opened, the rear end piston is pushed to return, the transmission cam shaft is driven to rotate back, the front end piston is pushed to return when the transmission cam shaft rotates back, but the return stroke of the front end piston is subjected to the resistance of the pushing spring in front of the front end piston, so that mutual counter force and interference force between the main driving spring and the front end piston pushing spring are formed, and the operation of the whole door closer generates unstable factors.

Therefore, the internal structure of the device is required to be designed more reasonably, so that the device can run more smoothly and stably and is more convenient to use.

Disclosure of Invention

Based on the above, the invention aims to provide the door closer which has a simple structure, is convenient to use and runs stably and smoothly.

The door closer of the present invention includes:

a housing;

the transmission cam shaft is pivoted in the shell, and the axial direction of the transmission cam shaft is vertical to the extension direction of the shell;

the link arm, one end of the said link arm is connected with said drive cam shaft, the said link arm can drive the said drive cam shaft to rotate;

the sliding rail assembly can be arranged on a door leaf and is connected with the other end of the connecting arm;

the front piston assembly and the rear piston assembly are arranged in the shell and are respectively positioned at the front side and the rear side of the transmission cam shaft, and the front piston assembly is connected with the rear piston assembly; the transmission cam shaft can push the rear piston assembly and the front piston assembly to retreat; the rear piston assembly and the front piston assembly can automatically return and drive the transmission cam shaft to rotate.

According to the door closer, the transmission cam shaft, the link arm, the sliding rail assembly, the front piston assembly and the rear piston assembly are arranged, when the door is opened, external force is conducted through the link arm to drive the transmission cam shaft to rotate, and the transmission cam shaft can push the rear piston assembly and the front piston assembly to retreat; when the door is closed, the rear piston assembly and the front piston assembly can automatically return and drive the transmission cam shaft to rotate back, the acting directions of the rear piston assembly and the front piston assembly on the transmission cam shaft are consistent, mutual opposition and interference force cannot be generated, the transmission cam shaft drives the link arm and acts on the slide rail assembly to close the door leaf, the operation of the whole door closer is smooth and stable, and the problem that the mutual opposition force and interference force between a main driving spring and a front end piston pushing spring of the door closer in the prior art are unstable in operation of the whole door closer is solved.

In one embodiment, the housing is a cylindrical hollow structure. The columnar hollow structure is convenient to process, produce and install.

In one embodiment, the transmission cam shaft has an upper pivot shaft and a lower pivot shaft, the upper pivot shaft and the lower pivot shaft are respectively pivoted in the housing through a bearing, and an end of the upper pivot shaft is connected with the one end of the link arm. The upper pivot shaft and the lower pivot shaft are pivoted on the shell through the bearing, so that the rotation of the transmission cam shaft is smoother and more stable.

In one embodiment, a square column is arranged at the upper end of the upper pivot shaft, a square hole is formed in one end of the link arm, and the square column is embedded in the square hole and fastened through a fastening piece. The upper pin joint shaft is connected with one end of the link arm by matching the square column and the square hole, so that the connection is stable, and the connection between the upper pin joint shaft and the link arm can be prevented from slipping. Preferably, the square column can be fastened using screws with the addition of spacers, and further preferably M6 screws are used.

In one embodiment, the sliding rail assembly includes a sliding rail and a sliding block, the sliding rail is mountable on a door leaf, the sliding block is slidably disposed on the sliding rail, and the sliding block is connected to the other end of the link arm. Preferably, a round hole is formed in the other end, and the other end is connected with the sliding block by using a screw, and further preferably, an M8 screw is used.

In one embodiment, the rear piston assembly includes a rear piston, a rear roller, and a drive spring;

the rear roller is tightly attached to the rear side of the transmission cam shaft, a through hole is formed in the rear roller, the rear roller is inserted into the through hole, and two ends of the rear roller are connected with the front end of the rear piston;

and two ends of the driving spring are respectively abutted against the rear end of the rear piston and the rear end of the shell.

The transmission cam shaft can push the rear roller to retreat when rotating, so that the rear piston is driven to retreat, and the retreated rear piston can enable the driving spring to compress and accumulate energy.

In one embodiment, the front piston assembly comprises a front piston, a front roller, a follower spring and a reducing screw;

the front roller is tightly attached to the front side of the transmission cam shaft, a through hole is formed in the front roller, the front roller is inserted into the through hole, and two ends of the front roller are connected with the rear end of the front piston;

the front piston is provided with a step hole which is communicated along the horizontal direction, the follow-up spring is arranged in a large hole of the step hole, the reducing screw rod penetrates through the follow-up spring and the step hole, the front end of the reducing screw rod is abutted against the follow-up spring, and the rear end of the reducing screw rod is connected with the rear piston.

The rear piston pulls the reducing screw rod to retreat together when retreating, the retreating of the reducing screw rod can compress the follow-up spring, and then the follow-up spring pushes the front piston to cling to the transmission cam shaft to retreat. When the door is automatically closed, the driving spring releases the kinetic energy compressed when the door is opened to push the back piston return stroke to drive the transmission cam shaft to rotate, the transmission cam shaft pushes the front piston return stroke when rotating, meanwhile, the follow-up spring also releases the kinetic energy compressed when the door is opened to pull the back piston return stroke to transmit the force to the transmission cam shaft to generate a larger output force. The releasing force of the driving spring pushes the rear piston at the rear part, and the releasing force of the follow-up spring pulls the rear piston at the front part, so that the acting directions are consistent, and mutual confrontation and interference force cannot be generated, so that the whole door closer is smoother and more stable in operation.

In one embodiment, the front piston is provided with four stepped holes, the servo springs and the reducing screws are four, the rear piston is provided with four axial threaded holes, and the rear ends of the four reducing screws are respectively connected with the four axial threaded holes. The number of the sleeve holes, the servo springs, the diameter-variable screw rods and the axial threaded holes are four, so that the front end and the rear end of each diameter-variable screw rod are stably connected and stressed in a balanced manner, and the back movement and the return stroke of the front piston and the back piston are smoother and more stable.

In one embodiment, the outer walls of the front end and the rear end of the shell are respectively provided with a front mounting plate and a rear mounting plate;

the front end opening and the rear end opening of the shell are respectively covered with a front end cover and a rear end cover.

The front mounting plate and the rear mounting plate can be used for mounting and fixing the shell, and the front end cover and the rear end cover can be conveniently disassembled and assembled into the front piston assembly and the rear piston assembly.

In one embodiment, the door closer further comprises an adjustment assembly comprising an adjustment shaft, an adjustment nut, a first adjustment gear, and a second adjustment gear;

the adjusting shaft penetrates through the rear end cover, the adjusting nut is adjustably arranged on the adjusting shaft through threads, the front end of the adjusting shaft extends into the driving spring, and the rear end of the driving spring abuts against the adjusting nut;

first adjusting gear pin joint in on the rear mounting panel, second adjusting gear be located outside the rear end cap and with the rear end fixed connection of regulating spindle, first adjusting gear with the perpendicular meshing of second adjusting gear.

Can adjust through rotating first adjusting gear drives the rotation of second adjusting gear to make the regulating spindle rotates, the pivoted regulating spindle passes through the screw thread messenger adjusting nut removes, thereby adjusts drive spring's compression degree.

Compared with the prior art, the door closer is provided with the transmission cam shaft, the link arm, the sliding rail assembly, the front piston assembly and the rear piston assembly, when the door is opened, external force is transmitted through the link arm to drive the transmission cam shaft to rotate, and the transmission cam shaft can push the rear piston assembly and the front piston assembly to retreat; when the door is closed, the rear piston assembly and the front piston assembly can automatically return and drive the transmission cam shaft to rotate back, the acting directions of the rear piston assembly and the front piston assembly on the transmission cam shaft are consistent, mutual opposition and interference force cannot be generated, the transmission cam shaft drives the link arm and acts on the slide rail assembly to close the door leaf, the operation of the whole door closer is smooth and stable, and the problem that the mutual opposition force and interference force between a main driving spring and a front end piston pushing spring of the door closer in the prior art are unstable in operation of the whole door closer is solved. The door closer has the characteristics of simple structure, convenience in use, stability and smoothness in operation and the like.

For a better understanding and practice, the invention is described in detail below with reference to the accompanying drawings.

Drawings

Fig. 1 is a schematic structural view of a preferred structure of the door closer of the present invention.

Figure 2 is an exploded schematic view of a preferred construction of the door closer of the present invention.

Fig. 3 is a cross-sectional view of the housing internal structure.

Fig. 4 is a partial cross-sectional view of the structure within the housing.

FIG. 5 is a cross-sectional view of another embodiment.

Detailed Description

The terms of orientation of up, down, left, right, front, back, top, bottom, and the like, referred to or may be referred to in this specification, are defined relative to their configuration, and are relative concepts. Therefore, it may be changed according to different positions and different use states. Therefore, these and other directional terms should not be construed as limiting terms.

The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

The terminology used in the present disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used in this disclosure and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

Please refer to fig. 1 and fig. 2. Fig. 1 is a schematic structural view of a preferred structure of the door closer of the present invention. Figure 2 is an exploded schematic view of a preferred construction of the door closer of the present invention.

The door closer of the present invention includes:

a housing 1;

the transmission cam shaft 2 is pivoted in the shell 1, and the axial direction of the transmission cam shaft 2 is vertical to the extending direction of the shell 1;

a link arm 3, wherein one end of the link arm 3 is connected with the transmission cam shaft 2, and the link arm 3 can drive the transmission cam shaft 2 to rotate;

the sliding rail assembly 4 can be installed on a door leaf, and the sliding rail assembly 4 is connected with the other end of the connecting arm 3;

the front piston assembly 5 and the rear piston assembly 6 are arranged in the shell 1 and are respectively positioned at the front side and the rear side of the transmission camshaft 2, and the front piston assembly 5 is connected with the rear piston assembly 6; the transmission camshaft 2 can push the rear piston assembly 6 and drive the front piston assembly 5 to retreat; the rear piston assembly 6 and the front piston assembly 5 can automatically return and drive the transmission camshaft 2 to rotate.

By arranging the transmission cam shaft 2, the link arm 3, the sliding rail assembly 4, the front piston assembly 5 and the rear piston assembly 6, when the door is opened, external force is transmitted through the link arm 3 to drive the transmission cam shaft 2 to rotate, and the transmission cam shaft 2 can push the rear piston assembly 6 and drive the front piston assembly 5 to retreat; when the door is closed, the rear piston assembly 6 and the front piston assembly 5 can automatically return and drive the transmission cam shaft 2 to rotate back, the acting directions of the rear piston assembly 6 and the front piston assembly 5 on the transmission cam shaft 2 are consistent, mutual opposition and interference force cannot be generated, the transmission cam shaft 2 drives the link arm 3 and acts on the slide rail assembly 4 to close the door leaf, the operation of the whole door closer is smoother and more stable, and the problem that the mutual opposition force and the interference force between a main driving spring and a front end piston pushing spring of the door closer in the prior art are unstable in the operation of the whole door closer is solved.

Please further refer to fig. 3 and 4. Fig. 3 is a cross-sectional view of the housing internal structure. Fig. 4 is a partial cross-sectional view of the structure within the housing.

The housing 1 of the present embodiment is a cylindrical hollow structure. The columnar hollow structure is convenient to process, produce and install.

The transmission cam shaft 2 is provided with an upper pivot shaft and a lower pivot shaft, the upper pivot shaft and the lower pivot shaft are respectively pivoted in the shell 1 through a bearing 7, and the end part of the upper pivot shaft is connected with one end of the link arm 3. The upper pivoting shaft and the lower pivoting shaft are pivoted on the shell 1 through a bearing 7, so that the rotation of the transmission cam shaft 2 is smoother and more stable.

Preferably, a bearing hole is formed in the lower portion of the housing 1, and the bearing 7 located below is installed in the bearing hole. In addition, this embodiment also preferably has set up shaft cover 8, shaft cover 8 lid is located the middle part of casing 1 seals the opening, be located the top bearing 7 install in shaft cover 8, and shaft cover 8 will transmission camshaft 2 limits in casing 1, and leave suitable clearance and can let transmission camshaft 2 nimble rotation in certain extent.

In one embodiment, a square column is arranged at the upper end of the upper pivot shaft, a square hole is formed at the one end of the link arm 3, and the square column is embedded in the square hole and fastened through a fastener. The upper pivot shaft is connected to the one end of the link arm 3 by fitting the square column and the square hole, so that the connection is stabilized, and the connection of the upper pivot shaft and the link arm 3 can be prevented from slipping. Preferably, the square column can be fastened using screws 9 with the addition of spacers 91, further preferably M6 screws.

The slide rail assembly 4 includes a slide rail 41 and a slider 42, the slide rail 41 is mountable on a door leaf, the slider 42 is slidably disposed on the slide rail 41, and the slider 42 is connected to the other end of the link arm 3. It is preferable to open a round hole at the other end and connect the other end with the slider 42 using a screw 10, and it is further preferable to use an M8 screw.

The rear piston assembly 6 of the present embodiment includes a rear piston 61, a rear roller 62, a rear roller 63, and a drive spring 64.

The rear roller 62 is closely attached to the rear side of the transmission camshaft 2, the rear roller 62 is provided with a through hole, the rear roller 63 is inserted into the through hole, and two ends of the rear roller 63 are connected with the front end of the rear piston 61.

Both ends of the drive spring 64 abut against the rear end of the rear piston 61 and the rear end of the housing 1, respectively.

When the transmission camshaft 2 rotates, the rear roller 62 is pushed to retreat, so that the rear piston 61 is driven to retreat, and the retreated rear piston 61 can compress the driving spring 64 to accumulate energy.

The front piston assembly 5 of the present embodiment includes a front piston 51, a front roller 52, a front roller shaft 53, a follower spring 54, and a reducer screw 55.

The front roller 52 is closely attached to the front side of the transmission camshaft 2, the front roller 52 is provided with a through hole, the front roller 53 is inserted into the through hole, and two ends of the front roller 53 are connected with the rear end of the front piston 51.

The front piston 51 is provided with a step hole which is communicated in the horizontal direction, the follow-up spring 54 is arranged in a large hole of the step hole, the reducing screw 55 penetrates through the follow-up spring 54 and the step hole, the front end of the reducing screw 55 is pressed on the follow-up spring 54, and the rear end of the reducing screw 55 is connected with the rear piston 61.

The diameter of the small hole of the stepped hole is smaller than the outer diameter of the follower spring 54, so that the follower spring 54 is prevented from entering the small hole of the stepped hole. The following spring 54 keeps a certain gap with the large hole of the stepped hole, so that the following spring 54 can freely stretch and retract in the large hole of the stepped hole. In addition, of the head of the reducing screw 55Width of Degree of rotation(or the outer diameter) is larger than the inner diameter of the follow-up spring 54, so that the head of the reducing screw 55 is prevented from sinking into the follow-up spring 54, and a certain gap is kept between the head of the reducing screw 55 and the large hole of the stepped hole, so that the reducing screw can also freely move in the large hole of the stepped hole.

The rear piston 61 pulls the reducing screw 55 to retreat together while retreating, the retreating of the reducing screw 55 compresses the follower spring 54, and the follower spring 54 pushes the front piston 51 to cling to the transmission camshaft 2 to retreat. When the door is automatically closed, the driving spring 64 releases the kinetic energy compressed during door opening to push the back piston 61 to return and drive the transmission cam shaft 2 to rotate back, the transmission cam shaft 2 pushes the front piston 51 to return when rotating back, and meanwhile, the follow-up spring 54 releases the kinetic energy compressed during door opening to pull the back piston 61 to return and then transmit the force to the transmission cam shaft 2 to generate a larger output force. Because the releasing force of the driving spring 64 pushes the rear piston 61 at the rear, and the releasing force of the follower spring 54 pulls the rear piston 61 at the front, the acting directions are consistent, and mutual opposition and interference forces cannot be generated, so that the operation of the whole door closer is smoother and more stable.

In one embodiment, the front piston 51 is provided with four stepped holes, the follower spring 54 and the variable diameter screw 55 are both four, the rear piston 61 is provided with four axial threaded holes, and the rear ends of the four variable diameter screws 55 are respectively connected with the four axial threaded holes. The number of the sleeve holes, the follow-up spring 54, the reducing screw 55 and the axial threaded holes are four, so that the front end and the rear end of the reducing screw 55 are stably connected and are stressed in a balanced manner, and the backward movement and the return stroke of the front piston 51 and the rear piston 61 are smoother and more stable.

Referring to fig. 5, fig. 5 is a cross-sectional view of another embodiment. A stepped hole may be formed in the rear piston 61 in the figure, the head of the variable diameter screw and the follower spring may be placed in the large hole of the stepped hole in the same manner, and the rear end of the variable diameter screw may be connected to the front piston 51, which may also achieve the above-described effects.

The outer wall of the front end and the rear end of the shell 1 are respectively provided with a front mounting plate 11 and a rear mounting plate 12. The front mounting plate 11 and the rear mounting plate 12 are each preferably fastened to the housing 1 by screws. The housing 1 can be fixed by the front mounting plate 11 and the rear mounting plate 12.

The front end opening and the rear end opening of the shell 1 are respectively covered with a front end cover 13 and a rear end cover 14. The front end cover 13 and the rear end cover 14 can facilitate the disassembly and assembly of the front piston assembly 5 and the rear piston assembly 6.

In addition, the door closer further comprises an adjustment assembly comprising an adjustment shaft 15, an adjustment nut 16, a first adjustment gear 17 and a second adjustment gear 18.

The adjusting shaft 15 penetrates through the rear end cover 14, the adjusting nut 16 is adjustably arranged on the adjusting shaft 15 through threads, the front end of the adjusting shaft 15 extends into the driving spring 64, and the rear end of the driving spring 64 abuts against the adjusting nut 16.

The first adjusting gear 17 is pivoted on the rear mounting plate 12, the second adjusting gear 18 is positioned outside the rear end cover 14 and fixedly connected with the rear end of the adjusting shaft 15, and the first adjusting gear 17 is vertically meshed with the second adjusting gear 18.

The tooth profile of the first adjusting gear 17 faces downwards, and the tooth profile of the second adjusting gear 18 faces outwards, so that the first adjusting gear and the second adjusting gear are vertically meshed at an angle of 90 degrees.

The rear mounting plate 12 is provided with a mounting hole, and the shaft of the first adjusting gear 17 is mounted in the mounting hole. The mounting holes are preferably provided as round holes.

The first adjusting gear 17 can be adjusted by rotation to rotate the second adjusting gear 18, so that the adjusting shaft 15 is rotated, and the rotating adjusting shaft 15 moves the adjusting nut 16 through threads, so that the compression degree of the driving spring 64 is adjusted.

Preferably, a hexagonal hole is formed in the middle of the second adjusting gear 18, a hexagonal column is arranged at the rear end of the adjusting shaft 15, and the rear end of the adjusting shaft 15 is fixedly connected with the second adjusting gear 18 through the matching of the hexagonal column and the hexagonal hole.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.

Claims

1. A door closer, comprising:

a housing;

the front piston assembly and the rear piston assembly are arranged in the shell and are respectively positioned at the front side and the rear side of the transmission cam shaft, and the front piston assembly is connected with the rear piston assembly; the transmission cam shaft can push the rear piston assembly and the front piston assembly to retreat; the rear piston assembly and the front piston assembly can automatically return and drive the transmission cam shaft to rotate;

the rear piston assembly comprises a rear piston, a rear roller, a rear rolling shaft and a driving spring;

two ends of the driving spring are respectively abutted against the rear end of the rear piston and the rear end of the shell;

the front piston assembly comprises a front piston, a front roller, a front rolling shaft, a follow-up spring and a reducing screw rod;

2. A door closer according to claim 1, wherein: the shell is of a cylindrical hollow structure.

3. A door closer according to claim 1, wherein: the transmission cam shaft is provided with an upper pivot shaft and a lower pivot shaft, the upper pivot shaft and the lower pivot shaft are respectively pivoted in the shell through a bearing, and the end part of the upper pivot shaft is connected with one end of the link arm.

4. A door closer according to claim 3, wherein: the upper end of the upper pin joint shaft is provided with a square column, one end of the link arm is provided with a square hole, and the square column is embedded in the square hole and fastened through a fastener.

5. A door closer according to claim 1, wherein: the sliding rail assembly comprises a sliding rail and a sliding block, the sliding rail can be installed on a door leaf, the sliding block can be arranged on the sliding rail in a sliding mode, and the sliding block is connected with the other end of the connecting arm.

6. A door closer according to claim 1, wherein: four step holes are formed in the front piston, the servo springs and the reducing screw rods are four, four axial threaded holes are formed in the rear piston, and the rear ends of the four reducing screw rods are connected with the four axial threaded holes respectively.

7. A door closer according to any one of claims 1 to 5, wherein: the outer walls of the front end and the rear end of the shell are respectively provided with a front mounting plate and a rear mounting plate;

8. A door closer according to claim 7, wherein: the door closer also comprises an adjusting component, and the adjusting component comprises an adjusting shaft, an adjusting nut, a first adjusting gear and a second adjusting gear;