CN211173633U - Door closer with two-cavity structure - Google Patents

Abstract

The utility model discloses a door closer with a two-cavity structure, which is characterized in that a force application mechanism and a bearing mechanism are movably connected through a rotating arm, the bearing mechanism is provided with a guide groove, the force application mechanism is arranged in a two-cavity fixed shell, and a linkage part and an acting part are arranged in the force application mechanism; the linkage component provides push-pull force for the acting component through the rotating arm, the acting component comprises a closed shell, the inner cavity of the shell is filled with damping media in a fluid form, a piston is arranged in the shell, the piston moves in the length direction of the shell in the shell, and resistance from the damping media is applied to the piston in the movement process. The utility model discloses simple structure, component part are few, have reduced the cost of production, and through the structure that sets up two cavitys, linkage part and acting part are installed separately, are difficult for receiving external disturbance, and the location is steady, long service life, and this door closer has the less advantage of size, installs on door and window or inside door and window, has better outward appearance effect.

Description

Door closer with two-cavity structure

Technical Field

The utility model relates to a switching auxiliary device of door, window class especially relates to a door closer with two chamber structures.

Background

A door closer is a device designed to assist opening and closing operations of a door and a window. The door closer has the significance of not only automatically closing the door, but also protecting the door frame and the door body (smooth closing), and is used in commercial and public buildings to automatically close the door to limit the spread of fire and ventilation in the building. In addition, the application of door closers in home life is gradually popularized by people.

The door closer in the prior art is mostly composed of a pull arm, an additional force component and a buffer, wherein the additional force component and the buffer are arranged on two sides of the pull arm, the door closer is complex in structure, multiple in component parts, time-consuming and labor-consuming in assembly, and large in overall size, can be installed only in a mode of greatly exposing a door plate or a door frame, and not only is the appearance influenced, but also the use of the door closer is sometimes influenced, so that inconvenience is brought. In the process of simplifying the structure of the door closer, a person skilled in the art finds that if the door closer is not installed properly, the acting force of the additional force component and the buffer is not in a straight line, and the long-term use can cause the displacement, deformation and even damage of the components, so that an external structure is needed to assist the fixation, and the service life is prolonged.

Accordingly, those skilled in the art have endeavored to develop a door closer having a two-chamber construction which, on the one hand, facilitates installation and, on the other hand, also provides stability of the components during operation.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned defect of prior art, the technical problem to be solved by the utility model is that cause the part to shift after the door closer is installed improperly and influence life's problem.

In order to achieve the above object, the present invention provides a door closer with a two-chamber structure, which comprises a force application mechanism and a bearing mechanism, wherein the force application mechanism and the bearing mechanism are matched with each other, and are respectively installed on one of a door frame and a door body in a selective manner; the force application mechanism is arranged in a two-cavity fixed shell, the fixed shell is separated by a partition plate to form a driving cavity and a hydraulic cavity, a linkage part is arranged in the driving cavity, and a working part is arranged in the hydraulic cavity; the linkage component comprises a rotating shaft in transmission connection with the rotating arm, the rotating shaft can rotatably and vertically penetrate through the driving cavity, a cam is in transmission connection with the rotating shaft and is hinged with a transmission rod, and the transmission rod penetrates through the partition board and is connected with the acting component; the acting component comprises a closed shell which is abutted with the partition plate, the inner cavity of the shell is filled with damping medium in a fluid state, a piston connected with a piston rod is arranged in the shell, the inner cavity of the shell is divided into a front cavity and a rear cavity by the piston, and the piston rod is arranged in the rear cavity and penetrates out of the rear end of the shell to be in transmission connection with the transmission rod; the piston is provided with a front end face and a rear end face which respectively correspond to the front cavity and the rear cavity, the front end face is pushed by a pushing part arranged in the front cavity, and the piston moves in the shell along the length direction of the shell and receives resistance from a damping medium in the movement. When the piston moves along the length direction of the shell, the damping medium in the front cavity and the damping medium in the rear cavity are promoted to flow relatively through the piston, and the flow resistance is generated under the action of the flow passage, so that the stress of the piston is influenced.

Furthermore, the rear end face of the piston is provided with at least one flow discharge channel which penetrates through the piston and is communicated with the front cavity and used for flowing of the damping medium, the flow discharge channel is also provided with a return channel which is communicated with the rear end face and the front end face, and the inner diameter of the flow discharge channel is larger than that of the return channel. When the flow channel is not closed, the flow rate of the flow leakage channel in unit time is greater than that of the return channel. Thus, when the drain is open, the damping medium flows more easily and provides less resistance to movement of the piston, whereas when the drain is blocked, fluid can only flow through the return, increasing resistance.

Furthermore, the diameter of the piston is smaller than the inner diameter of the shell so that a gap is reserved between the outer wall of the piston and the inner wall of the shell, the middle part of the piston is radially recessed to form an annular groove, a flow blocking ring is embedded in the annular groove in a sliding manner in the front-back direction, and the outer wall of the flow blocking ring is close to the inner wall of the shell; the outlet of the flow discharge channel is arranged on the annular groove, when the flow blocking ring slides to one side close to the front end face along the annular groove, the outer annular wall of the flow blocking ring blocks a gap between the front end face and the shell, and the flow discharge channel to the front cavity is blocked, so that the flow of a damping medium is slowed down.

Further, the drain passages are provided in plural and uniformly distributed along the circumferential direction of the piston.

Preferably, the urging portion is a compression spring.

In one embodiment of the present invention, a column is vertically disposed on the free end of the rotating arm along the surface of the rotating arm, and a roller is sleeved outside the column.

The utility model discloses an in the embodiment, the pivot is polygon prism shape, and it has the stupefied post through-hole more that match with the pivot to link up in the cam, and the pivot inlays in the through-hole of cam, sets up the polygon hole corresponding with pivot cross sectional dimension on the rotor arm, and the rotor arm is fixed to be cup jointed in the pivot.

Furthermore, a hinge hole is formed in the periphery of the cam, and the cam is movably connected with the transmission rod through the hinge hole.

Preferably, the damping medium is hydraulic oil.

Compared with the existing products, the door closer of the utility model has the advantages of simple structure, few component parts, reduced production cost, and the linkage part and the acting part are separately installed by the structure of the two cavities, thus being not easy to be interfered by the outside, stable in positioning and long in service life; and the door closer is arranged on a door or a door frame and only needs to be fixed through a positioning hole, so that the door closer is convenient to install and use, has the advantage of small size due to compact structure, is arranged on the door or the window or in the door or the window, and has better appearance effect.

The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings, so as to fully understand the objects, the features and the effects of the present invention.

Drawings

Fig. 1 is an external schematic view of the door closer of the present invention.

Fig. 2 is a schematic structural diagram of a bearing mechanism of the door closer of the present invention.

Fig. 3 is a schematic structural view of a force application mechanism of the door closer of the present invention.

Fig. 4 is a schematic structural diagram of a piston rod and a piston of the door closer of the present invention.

Fig. 5 is a schematic sectional structure view of the urging mechanism of the door closer according to the present invention when the piston moves backward.

FIG. 6 is a schematic diagram of the position relationship between the piston and the baffle ring in the state of FIG. 5: (a) front view (b) cross-sectional view.

Fig. 7 is a schematic sectional structure view of the urging mechanism of the door closer according to the present invention when the piston moves forward.

FIG. 8 is a schematic diagram of the position relationship between the piston and the baffle ring in the state of FIG. 7: (a) front view (b) cross-sectional view.

In the figure, 100 force application mechanisms, 1 linkage component, 11 rotating shafts, 12 cams, 13 fixed shells, 131 driving cavities, 132 hydraulic cavities, 14 transmission rods, 15 transmission blocks, 16 connecting rods, 2 acting components, 21 mounting holes, 22 partition plates, 23 shells, 231 sleeves, 232 sealing sleeves, 24 shell inner cavities, 241 front cavities, 242 rear cavities, 25 piston rods, 26 pistons, 261 front end surfaces, 262 rear end surfaces, 263 annular grooves, 264 leakage channels, 265 return channels, 27 flow blocking rings, 31 compression springs, 200 bearing mechanisms, 201 guide grooves, 202 inlets, 300 rotating arms, 301 rollers and 302 shaft columns.

Detailed Description

As shown in fig. 1, the utility model discloses a door closer of two chamber structures, including the application of force mechanism 100 and the load-bearing mechanism 200 of mutually supporting, each alternative is installed in one of door frame and the door body, for example, the user can install application of force mechanism in the bottom side of last door frame, install load-bearing mechanism in door body upside or the door body by the upside that is close with the door frame of the door face of the direction of pushing away, the mode of installation is including hiding the installation, again for example, can install above-mentioned two mechanisms in the downside of door frame and the door body, or vice versa, install application of force mechanism on the door body, install load-bearing mechanism on the door frame. The force application mechanism 100 and the bearing mechanism 200 are movably connected through a rotating arm 300, as shown in fig. 2, the bearing mechanism 200 is provided with a guide groove 201 for the free end of the rotating arm 300 to enter and slide, the guide groove 201 is provided with an inlet 202 for the free end of the rotating arm 300 to enter, and the position of the inlet 202 is matched with the position of the free end of the rotating arm 300, for example, when the bearing mechanism 200 is installed on a door and the force application mechanism 100 is installed on a door frame, the inlet 202 of the guide groove 201 needs to be on an arc track through which the free end of the rotating arm 300 rotates relative to the door. Alternatively, the longitudinal direction of the guide groove 201 is along the direction of the door surface when the support mechanism 200 is mounted on the door, and the longitudinal direction of the guide groove 201 is along the direction of the door surface when the door is closed when the support mechanism is mounted on the door frame.

The force applying mechanism 100 is installed in a fixed housing 13 having two cavities, as shown in fig. 3, two ends of the fixed housing 13 are provided with installation holes 21 for fixing on a door or a door frame; the fixed shell 13 is separated by a partition 22 to form a driving cavity 131 and a hydraulic cavity 132, a linkage part 1 is arranged in the driving cavity 131, and a working part 2 is arranged in the hydraulic cavity 132.

The linkage part 1 comprises a rotating shaft 11 in transmission connection with the rotating arm 300, the rotating shaft 11 rotatably and vertically penetrates through the driving cavity 131, the linkage part further comprises a cam 12, the cam 12 is installed in the driving cavity 131, the rotating shaft 11 penetrates through the cam 12, and cushion blocks or gaskets for positioning and installing the rotating shaft 11 are fixedly arranged on the top surface and the bottom surface of the driving cavity 131. The cam 12 is provided with a hinge hole at its outer circumference to hinge a driving lever 14. The transmission rod 14 passes through the partition plate to be connected with the acting component, and the cam 12 rotates to transmit to push and pull the acting component 2.

In a preferred embodiment, the shaft 11 has a hexagonal cylindrical shape, and the rotating arm 300 has a hexagonal hole corresponding to the sectional size of the shaft 11. The other end of the rotating arm 300 is a free end and is provided with a roller 301, and the roller 301 is sleeved on a shaft column 302 fixed on the end part of the free end of the rotating arm 300. Under the condition that the linkage part 1 is not forced to rotate, the rotating arm has an initial position, along with the closing action of the door, the force application mechanism 100 makes an arc motion relative to the bearing mechanism 200, the roller 301 at the free end of the rotating arm 300 enters the guide groove 201 and slides along the guide groove 201, and the rotating arm 300 rotates, so that the rotating shaft 11 is driven to rotate, and the linkage part 1 makes a synchronous rotation.

As shown in fig. 4 and 5, the working element 2 includes a sealed housing 23 abutting against the partition 22, the sealed housing 23 includes a sleeve 231, both ends of the sleeve are sealed, one end of the housing 23 is penetrated with a piston rod 25 from the outside, and the aperture of the hole of the end of the housing 23 through which the piston rod 25 passes is set to be equal to the outer diameter of the piston rod 25, so that the two are close to each other to improve the sealing property. One end of the piston rod 25 is fixedly inserted with a transmission block 15, the transmission block 15 is in transmission connection with the transmission rod 14, a sealing sleeve 232 is further sleeved at the joint of the end of the piston rod 25 and the transmission block 15, and the sealing sleeve 232 is connected with the end of the shell 23. When the transmission rod 14 is driven by the connecting rod 12, the transmission block 15 is pushed and pulled to drive the piston rod 25 connected with the transmission block 15 to move forwards and backwards.

The end of the piston rod 25 extending into the housing 23 is fixedly connected with a piston 26, and the housing inner cavity 24 is divided into a front cavity 241 and a rear cavity 242 by the piston 26. The damping medium in fluid form is filled in the front cavity 241 and the rear cavity 242, in an embodiment of the present invention, the damping medium is hydraulic oil. The piston 26 has a front end surface 261 and a rear end surface 262 corresponding to the front cavity 241 and the rear cavity 242, respectively, and at least one passage leading to the cavity corresponding to the other end surface through one of the end surfaces is opened on the piston 26 to form a flow passage of hydraulic oil, as shown in fig. 5.

In the sectional structure of the force applying mechanism of the door closer of the present invention as shown in fig. 5, the diameter of the piston 26 is smaller than the inner diameter of the housing 23 so that the outer wall of the piston 26 and the inner wall of the housing 23 have a gap, the middle portion of the piston 26 is radially recessed to form an annular groove 263, and a flow blocking ring 27 is embedded in the annular groove 263 in a forward and backward sliding manner, and the outer wall of the flow blocking ring 27 is close to the inner wall of the housing 23. As shown in fig. 3, four drainage channels 264 are symmetrically formed on the rear end surface 262 of the piston 26 and are communicated with the annular groove 263, and the inner hole of the baffle ring 27 is sized to be sufficiently communicated with the drainage channels 264, for example, when the drainage channels 264 are communicated with the recessed wall of the annular groove 263, the inner hole is formed to provide a gap between the baffle ring 27 and the recessed wall of the annular groove 263. A return passage 265 further penetrates through the piston 26, and openings at both ends of the return passage 265 are respectively located on both end surfaces of the piston 26; when the piston moves, the baffle ring 27 moves in the annular groove 263 due to the viscous action of the hydraulic oil, and the baffle ring 27 slides along the annular groove 263 to a side close to one of the end surfaces of the piston due to the continuous movement of the piston, the outer annular wall of the baffle ring 27 blocks the gap between the end surface and the housing, thereby blocking the flow of the hydraulic oil in the gap. When the flow channel is not closed, the flow rate of the flow leakage channel per unit time is greater than that of the return channel, and an optional embodiment for achieving the purpose is to set the aperture of the flow leakage channel to be greater than that of the return channel.

A compression spring 31 is provided in the front cavity 241, the compression spring 31 abutting against the piston 26 so as to continuously give an elastic pushing force to the piston rod 25 connected to the piston 26, and giving a buffering force to the piston rod 25 when the piston 26 moves forward in a direction in which the compression spring 31 is compressed; when the piston rod 25 moves in the direction in which the compression spring 31 is returned, the elastic potential energy is released, giving the piston rod 25 a thrust force.

The door closer operating mechanism is exemplified as follows: when the door is closed, the free end of the rotating arm in the force application mechanism makes arc motion towards the guide groove of the bearing mechanism along the door closing direction and slides into the guide groove, so that the rotating arm rotates to drive the cam to rotate, the transmission rod drives the piston rod to pull the piston backwards (downwards as shown in fig. 5), the compression spring in the front cavity pushes the piston to move backwards, meanwhile, the flow blocking ring in the annular groove relatively forwards reaches the front side of the piston and blocks an oil passing gap between the front end surface of the piston and the inner wall of the shell, hydraulic oil in the flow release channel cannot flow to the front cavity, hydraulic oil in the front cavity can only slowly enter the rear cavity through the return channel, so that hydraulic resistance is formed, the acting force of the compression spring is partially counteracted, the effect of slowly closing the door is achieved, and the position relation of parts of the piston part is shown in fig. 5 and fig. 6; when the door is opened, the rotating direction of the rotating arm is opposite to that of the door when the door is closed, so that the piston rod is pushed to push the piston forwards, the compression spring is compressed, the flow blocking ring is oppositely arranged in the annular groove and reaches the rear side of the piston backwards, the rear end face of the piston is blocked and the inner wall of the shell, the drainage channel passes through an inner hole of the flow blocking ring and passes through a gap between the front end face of the piston and the inner wall of the shell and is communicated with the front cavity, so that hydraulic oil in the rear cavity can quickly enter the front cavity, the position relation of all parts of the piston part is shown in figures 7 and 8, the flow of the hydraulic oil is large enough at the moment, the piston cannot receive the resistance of the hydraulic oil when compressing the spring, the resistance received by the door is small, and along with.

The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the teachings of the present invention without undue experimentation. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.

Claims (9)

1. A door closer with a two-cavity structure comprises a force application mechanism and a bearing mechanism which are matched with each other, wherein one of the force application mechanism and the bearing mechanism is mounted on a door frame or a door body; the force application mechanism is arranged in a two-cavity fixed shell, the fixed shell is separated by a partition plate to form a driving cavity and a hydraulic cavity, a linkage part is arranged in the driving cavity, and a working part is arranged in the hydraulic cavity; the linkage component comprises a rotating shaft in transmission connection with the rotating arm, the rotating shaft can rotatably and vertically penetrate through the driving cavity, a cam is in transmission connection with the rotating shaft and is hinged with a transmission rod, and the transmission rod penetrates through the partition board and is connected with the acting component; the acting component comprises a closed shell which is abutted with the partition plate, the inner cavity of the shell is filled with damping medium in a fluid state, a piston connected with a piston rod is arranged in the shell, the inner cavity of the shell is divided into a front cavity and a rear cavity by the piston, and the piston rod is arranged in the rear cavity and penetrates out of the rear end of the shell to be in transmission connection with the transmission rod; the piston is provided with a front end face and a rear end face which respectively correspond to the front cavity and the rear cavity, the front end face is pushed by a pushing part arranged in the front cavity, and the piston moves in the shell along the length direction of the shell and receives resistance from a damping medium in the movement.

2. The door closer of two chamber structure as claimed in claim 1, wherein the rear end surface of the piston is opened with at least one discharge passage for the flow of the damping medium which passes through the piston to the front chamber, and a return passage for communicating the rear end surface with the front end surface, and the discharge passage is larger in inner diameter than the return passage.

3. The door closer of two-chamber structure according to claim 2, wherein the diameter of the piston is smaller than the inner diameter of the housing so that a gap is formed between the outer wall of the piston and the inner wall of the housing, the middle part of the piston is radially recessed to form an annular groove, a flow blocking ring is embedded in the annular groove in a forward and backward sliding manner, and the outer wall of the flow blocking ring is close to the inner wall of the housing; the outlet of the flow discharge channel is arranged on the annular groove, when the flow blocking ring slides to one side close to the front end face along the annular groove, the outer annular wall of the flow blocking ring blocks a gap between the front end face and the shell, and the flow discharge channel to the front cavity is blocked, so that the flow of a damping medium is slowed down.

4. A door closer of two-chamber structure as claimed in claim 3, wherein the drain passage is provided in plural and uniformly distributed in a circumferential direction of the piston.

5. The door closer of two-chamber structure as claimed in claim 1, wherein the urging portion is a compression spring.

6. A door closer of two-chamber construction as claimed in claim 1, wherein the free end of the pivotal arm is provided with an axle stub upstanding along the surface of the pivotal arm, the axle stub being externally fitted with a roller.

7. The door closer of the two-chamber structure as claimed in claim 1, wherein the rotating shaft is polygonal prism shaped, a through hole of a polygonal prism matching with the rotating shaft is penetrated in the cam, the rotating shaft is embedded in the through hole of the cam, a polygonal hole corresponding to the cross section size of the rotating shaft is opened on the rotating arm, and the rotating arm is fixedly sleeved on the rotating shaft.

8. A door closer of two-chamber structure as claimed in claim 1, wherein a hinge hole is provided on the outer circumference of the cam and the driving lever is movably connected through the hinge hole.

9. A door closer of two-chamber construction according to any one of claims 1 to 8, wherein the damping medium is hydraulic oil.

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