CN110566073A - Door closer - Google Patents
Door closer Download PDFInfo
- Publication number
- CN110566073A CN110566073A CN201911010982.1A CN201911010982A CN110566073A CN 110566073 A CN110566073 A CN 110566073A CN 201911010982 A CN201911010982 A CN 201911010982A CN 110566073 A CN110566073 A CN 110566073A
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- China
- Prior art keywords
- piston
- door closer
- flow
- piston rod
- channel
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- 230000007246 mechanism Effects 0.000 claims abstract description 48
- 238000013016 damping Methods 0.000 claims abstract description 24
- 230000033001 locomotion Effects 0.000 claims abstract description 14
- 230000000694 effects Effects 0.000 claims abstract description 7
- 230000005540 biological transmission Effects 0.000 claims description 27
- 238000007789 sealing Methods 0.000 claims description 25
- 230000000903 blocking effect Effects 0.000 claims description 21
- 239000010720 hydraulic oil Substances 0.000 claims description 19
- 230000006835 compression Effects 0.000 claims description 14
- 238000007906 compression Methods 0.000 claims description 14
- 239000012530 fluid Substances 0.000 claims description 4
- 238000009434 installation Methods 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05F3/00—Closers or openers with braking devices, e.g. checks; Construction of pneumatic or liquid braking devices
- E05F3/04—Closers or openers with braking devices, e.g. checks; Construction of pneumatic or liquid braking devices with liquid piston brakes
- E05F3/10—Closers or openers with braking devices, e.g. checks; Construction of pneumatic or liquid braking devices with liquid piston brakes with a spring, other than a torsion spring, and a piston, the axes of which are the same or lie in the same direction
Landscapes
- Closing And Opening Devices For Wings, And Checks For Wings (AREA)
Abstract
The invention discloses a door closer, which comprises a force application mechanism and a bearing mechanism which are matched with each other, wherein the force application mechanism and the bearing mechanism are movably connected through a rotating arm, and the bearing mechanism is provided with a guide groove for the free end of the rotating arm to enter and slide; the force application mechanism sets gradually linkage part and acting part along length direction, the linkage part sets up in force application mechanism's one end, including the pivot and carry out the transfer line of push-and-pull to acting part, acting part includes airtight casing and damping portion and the bullet portion of pushing away in the casing, the damping portion includes the piston rod, piston rod one end and transfer line swing joint, the other end pushes away the portion with the bullet and is connected, the piston rod receives the damping effect along linear motion and in the motion in the casing, the bullet portion of pushing away gives the piston rod with the motive force in the piston rod motion. The invention has the advantages of simple structure, few components, reduced production cost, convenient installation and use, compact structure, smaller size and longer service life.
Description
Technical Field
The present invention relates to an opening/closing assist device for doors and windows, and particularly to a door closer.
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.
Chinese utility model publication No. CN102472068A discloses a door and window opening and closing device, in which an arm block of a pull arm rotating from an open state to a closed state is provided in a main body box elongated in one direction, a 1 st slider linearly moving in one direction in association with the rotation of the arm block is provided on one side of the main body box, a 2 nd slider is provided on the opposite side of the 1 st slider, an additional force member for adding force to the 1 st slider in one direction is provided on one side of the main body box, and a damper for blocking the linear movement of the 2 nd slider is provided on the opposite side of the main body box. Just as this utility model discloses, door closer on the market, the majority is by a single arm-drag and set up rather than an additional power part and a buffer of both sides and constitute, such door closer structure is more complicated, the component part is numerous, the equipment is wasted time and energy, and has the problem that whole size is bigger than normal, can only install with the form that exposes door plant or door frame greatly, not only influences pleasing to the eye, also can influence its use sometimes to bring inconvenience.
Therefore, those skilled in the art have endeavored to develop a door closer having a simpler structure, which reduces the manufacturing cost and improves the convenience of use.
Disclosure of Invention
In view of the above defects of the prior art, the technical problem to be solved by the present invention is the disadvantages that the existing door closer is complex in structure, is not easy to assemble and install, and has large overall size, which affects the use.
In order to achieve the purpose, the invention provides a door closer, which comprises a force application mechanism and a bearing mechanism which are matched with each other, wherein the force application mechanism and the bearing mechanism are respectively selected and installed on one of a door frame and a door body; the force application mechanism sets gradually linkage part and acting part along length direction, wherein, the linkage part sets up in force application mechanism's one end, the linkage part includes the pivot of being connected with the rotor arm transmission and the transfer line that carries out the push-and-pull to the acting part through the transmission, the acting part includes inclosed casing and the adjacent damping portion of length direction and bullet portion of pushing away in the casing, the damping portion includes the piston rod, piston rod one end and transfer line swing joint, the other end is connected with the bullet portion of pushing away, the piston rod can be in the casing along linear motion and receive the damping effect in the motion through the transfer line transmission, the bullet portion of pushing away gives the piston rod with the motive force in the piston rod motion.
Furthermore, the end part of one end of the piston rod, which extends into the shell, is fixedly connected with a piston, the inner cavity of the shell is divided into a front cavity and a rear cavity by the piston, and the elastic pushing part is arranged in the front cavity; the front cavity and the rear cavity are filled with damping media in a fluid form, 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, and at least one channel which is communicated to the cavity corresponding to the other end face through one end face is communicated with the piston to form a flow channel of the damping media. 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.
In one embodiment of the invention, 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 front-back sliding manner, and the outer wall of the flow blocking ring is close to the inner wall of the shell; at least one drainage channel communicated to the annular groove is formed in one end face of the piston, an inner hole of the flow blocking ring is communicated with the drainage channel, a backflow channel is communicated in the piston, and openings of the backflow channel are respectively located on two end faces of the piston; when the flow blocking ring slides to one side close to one end face of the piston along the annular groove, the outer annular wall of the flow blocking ring blocks a gap between the end face and the shell.
Furthermore, 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.
In another embodiment of the invention, the outer wall of the piston and the inner wall of the housing are sealed, a plurality of flow guide channels are arranged in the piston, a first channel and a second channel which are communicated with the flow guide channels are respectively arranged on the front end surface and the rear end surface of the piston, and one-way valves are arranged in part of the flow guide channels. This embodiment provides another damping solution, with part of the flow guide being free of check valve control and part being check valve control, and when the check valve closes the flow guide, the flow through the piston decreases, increasing the resistance. The one-way valve is arranged in the piston, the resistance borne by the piston is adjusted by adjusting the flow condition of the damping medium, and the damping action of the spring is replaced by the mode, so that the mechanism is simple in composition, the fatigue defect of the spring after being used for multiple times can be overcome, and the service life of the door closer is prolonged.
As a further embodiment, each flow guide channel is formed by connecting a first cylindrical channel and a second cylindrical channel, wherein the inner diameter of the first cylindrical channel is smaller than that of the second cylindrical channel, so that an annular step is formed at the joint of the two cylindrical channels, a movable sealing member is arranged in part of the second cylindrical channels in the plurality of flow guide channels, the outer diameter of the sealing member is larger than the inner diameter of the first cylindrical channel, and the first cylindrical channel is blocked when the sealing member moves to the annular step.
In one embodiment of the invention, the linkage part comprises a cam in transmission connection with the rotating shaft, the cam is sleeved outside the rotating shaft, and the periphery of the cam is hinged with the transmission rod.
In another embodiment of the present invention, the linkage member includes a connecting rod drivingly connected to the rotating shaft, one end of the connecting rod being hinged to the rotating shaft, and the other end being hinged to the driving rod. The connecting rod transmission is adopted, the hydraulic mechanism and the elastic pushing mechanism are integrated in a cavity of the shell, and the structure is simple and compact.
Preferably, the urging portion comprises a compression spring or gas spring abutting an end of the piston rod of the damping portion. Compared with a compression spring, the gas spring is adopted as the ejection pushing piece, so that stronger ejection pushing force can be maintained for a long time, the pushing force given to the piston can be adjusted to a larger range, and the service life is long.
Preferably, the damping medium is hydraulic oil.
Compared with the existing product, the door closer has longer service life, simple structure, less component parts, reduced production cost and convenient installation and use, has the advantage of smaller size due to compact structure, and has better appearance effect when being installed on or in doors and windows.
The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings 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 view of a carrying mechanism of the door closer of the present invention.
Fig. 3 is a schematic configuration diagram of the urging mechanism of the door closer according to embodiment 1.
Fig. 4 is an exploded schematic view of each component of the door closer of embodiment 1.
Fig. 5 is a schematic structural view of a piston rod and a piston of the door closer of embodiment 1.
Fig. 6 is a schematic sectional structure view of the urging mechanism of the door closer of embodiment 1 when the piston moves rearward.
FIG. 7 is a schematic diagram of the position relationship between the piston and the baffle ring in the state of FIG. 6: (a) front view and (b) cross-sectional view.
Fig. 8 is a schematic sectional structure view of the urging mechanism of the door closer according to embodiment 1 when the piston moves forward.
FIG. 9 is a schematic view of the piston and baffle ring position in the condition of FIG. 8: (a) front view and (b) cross-sectional view.
Fig. 10 is a schematic structural view of the door closer of embodiment 2.
Fig. 11 is a schematic structural view of the door closer of embodiment 3.
Fig. 12 is a schematic structural view of the door closer of embodiment 4.
Fig. 13 is a schematic structural view of the door closer of embodiment 5.
Fig. 14 is a partially enlarged schematic view of a portion a in fig. 13.
Fig. 15 is a schematic structural view of the door closer of embodiment 6.
Fig. 16 is a partially enlarged schematic view of a portion B in fig. 15.
In the figure, 100 force application mechanisms, 1 linkage component, 11 rotating shafts, 12 cams, 13 boxes, 14 transmission rods, 15 transmission blocks, 16 connecting rods, 2 acting components, 21 first fixed ends, 22 second fixed ends, 23 shells, 231 sleeves, 232 first sealing ends, 233 second sealing ends, 234 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, 266 first channels, 267 second channels, 27 flow blocking rings, 28 sealing rings, 29 flow guiding channels, 291 first cylindrical channels, 292 second cylindrical channels, 293 annular steps, 294 sealing balls, 295 baffles, 31 compression springs, 32 gas springs, 200 bearing mechanisms, 201 guide grooves, 202 inlets, 300 rotating arms, 301 rollers and 302 shaft columns are adopted.
Detailed Description
Example 1
Fig. 1 shows a door closer of the present embodiment, which includes a force applying mechanism 100 and a carrying mechanism 200, which are mutually matched, and are selectively installed on one of the door frame and the door body, for example, a user can install the force applying mechanism on the bottom side of the upper door frame, and install the carrying mechanism on the upper side of the door body or the upper side of the door surface of the door body in the pushing direction close to the door frame, and the installation manner includes hidden installation (e.g. installation in the groove of the door body), for example, the above two mechanisms can be installed on the lower sides of the door frame and the door body, or conversely, the force applying mechanism can be installed on the door body, and the carrying mechanism is installed on. 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 inlet 202 of the guide groove is required to be positioned on an arc track through which the free end of the rotating arm 300 rotates when being installed. Alternatively, the length direction of the guide groove is along the direction of the door surface when the support mechanism is mounted on the door, and the length direction of the guide groove is along the direction of the door surface when the door is closed when the support mechanism is mounted on the door frame.
As shown in fig. 3 and 4, the force applying mechanism 100 includes a linkage component 1 and a working component 2, a first fixing end 21 and a second fixing end 22 are respectively disposed at two ends of the linkage component 1 and the working component 2, and mounting holes fixed on a door or a door frame are disposed on the first fixing end 21 and the second fixing end 22. The first fixed end 21 is fixedly connected with the front end of the closed shell 23 of the acting component 2, the linkage component 1 is installed in the second fixed end 22, the second fixed end 22 penetrates through the rotating shaft 11, the rotating arm 300 and the linkage component 1 are embedded in the rotating shaft 11, and the rotating arm 300 rotates to drive the rotating shaft 11 to rotate. 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.
In this embodiment, the linkage component 1 includes a cam 12, the cam 12 is installed in a box 13, the rotating shaft 11 passes through the cam 12, and a pad or a gasket for positioning and installing the rotating shaft 11 is fixedly disposed on both the top surface and the bottom surface of the box 13. The periphery of the cam 12 is provided with a hinge hole for hinging the transmission rod 14. The transmission rod 14 performs push-pull action on the acting component 2 through the rotation transmission of the cam 12.
As shown in fig. 4, the acting component 2 includes a sealed housing 23, the sealed housing 23 is composed of a sleeve 231, a first sealed end 232 and a second sealed end 233, the first sealed end 232 and the second sealed end 233 are sealed at two ends of the sleeve 231, wherein a piston rod 25 is inserted into the second sealed end 233, and the aperture of a hole connecting the second sealed end 233 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 performance. 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 234 is further sleeved at the joint of the end of the piston rod 25 and the transmission block 15, and the sealing sleeve 234 is connected with the end of the second sealing end 233. When the transmission rod 14 is driven by the cam 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 front cavity 241 and the rear cavity 242 are filled with a damping medium in a fluid form, which is hydraulic oil in one embodiment of the present invention. 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 door closer urging mechanism of the present embodiment as shown in fig. 6, the diameter of the piston 26 is smaller than the inner diameter of the housing 23 so that a gap is formed between the outer wall of the piston 26 and the inner wall of the housing 23, the middle portion of the piston 26 is radially recessed to form an annular groove 263, a flow blocking ring 27 is inserted into the annular groove 263 in a manner of sliding back and forth, and the outer wall of the flow blocking ring 27 is close to the inner wall of the housing 23. As shown in fig. 5, four drainage channels 264 are symmetrically formed on the rear end surface 262 of the piston 26 to communicate with the annular groove 263, and the inner hole of the baffle ring 27 is sized to sufficiently communicate with the drainage channels 264, for example, when the drainage channels 264 communicate 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 abuts against the piston 26 so as to continuously give an elastic pushing force to the piston 26 and the piston rod 25, and when the piston 26 moves forward in a direction in which the compression spring 31 is compressed, a buffering force is given to the piston rod 25; when the piston rod 25 moves in the direction of returning the compression spring 31, the elastic potential energy is released, and the piston rod 25 is given a thrust force, which is transmitted to facilitate the rotation of the rotation shaft 11 and the rotation arm 300.
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. 6), the compression spring in the front cavity pushes the piston to move backwards, meanwhile, the flow blocking ring relatively forwards in the annular groove 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. 6 and fig. 7; 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 (upwards move as shown in figure 8), the compression spring is compressed, the flow blocking ring oppositely and backwards reaches the rear side of the piston in the annular groove and blocks the rear end face of the piston 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 parts of the piston part is shown in figures 8 and 9, the flow of the hydraulic oil is large enough at the moment, so that the piston cannot bear the resistance of the hydraulic oil when compressing the spring, the resistance on the door is small, and along with the.
Example 2
The structure of the door closer of the present embodiment is substantially the same as that of embodiment 1, as shown in fig. 10, wherein the improved technical solution is as follows: the cam in the linkage part 1 is simplified into a connecting rod 16, one end of the connecting rod 16 is fixedly sleeved on the rotating shaft 11, the other end of the connecting rod 16 is hinged with the transmission rod 14, and the transmission rod 14 is transmitted through the connecting rod 16 so as to drive the piston rod 25 to move back and forth.
Example 3
The door closer of the present embodiment has substantially the same structure as that of embodiment 1, as shown in fig. 11, except that the compression spring is replaced with a gas spring 32.
Example 4
As shown in fig. 12, the door closer of the present embodiment is different from the structure of embodiment 1 in that a drain passage 264 is opened in a front end surface 261 of a piston 26 in a piston 26 portion. Similarly, a return passage 265 extends through the piston 26, and the drain passage 264 has a larger flow rate than the return passage 265.
Based on the structure of the embodiment, when the door is closed, the flow blocking ring reaches the front side of the piston in the annular groove in a forward direction and blocks an oil passing gap between the front end surface of the piston and the inner wall of the shell, but a discharge passage of the front end surface of the piston is communicated with the rear cavity, hydraulic oil has a large flow rate, and due to the pushing of the compression spring, the resistance on the closing of the door is small, and the door can be easily closed under the action of the force application mechanism; when the door is opened, the position of the flow blocking ring is located on the rear side of the piston, the oil passing gap on the rear end face is blocked, the drainage channel on the front end face of the piston cannot be communicated with the rear cavity, hydraulic oil can only slowly flow through the return channel to form resistance, and meanwhile, the compression spring is compressed and provides reverse thrust, so that the resistance for opening the door is further increased. The door closer of this embodiment is suitable for the occasion of making the door normally closed.
Example 5
As shown in fig. 13 and 14, the door closer of the present embodiment differs from that of embodiment 1 in the structure of the piston 26 portion. Specifically, the outer wall of the piston 26 is directly sealed with the inner wall of the housing 23, or sealed with the inner wall of the housing 23 by the sealing ring 28, the piston 26 is internally provided with a plurality of flow guide channels 29, as shown in the figure, two flow guide channels 29 are provided, the front end surface 261 and the rear end surface 262 of the piston 26 are respectively provided with a first channel 266 and a second channel 267 which are communicated with the two flow guide channels 29, the two flow guide channels 29 have the same structure and are formed by connecting a first cylindrical channel 291 and a second cylindrical channel 292, wherein the inner diameter of the first cylindrical channel 291 is smaller than that of the second cylindrical channel 292, so that an annular step 293 is formed at the joint of the two cylindrical channels. A sealing ball 294 is provided in the second cylindrical passage 292 of one of the two flow guides 29, the sealing ball 294 is restricted to move in the second cylindrical passage, a stopper ring or the like may be provided in the second passage, an outer diameter of the sealing ball 294 is larger than an inner diameter of the first cylindrical passage 291, and the first cylindrical passage 291 is closed when the sealing ball 294 moves to the annular step 293.
According to the structure, when the piston moves towards the front end, the sealing ball reaches the bottom of the second cylindrical channel under the action of the viscous force of hydraulic oil, at the moment, the two flow guide channels are communicated, the resistance formed by the hydraulic oil is smaller, when the piston moves towards the rear end, the sealing ball reaches the annular step and blocks the first cylindrical channel, at the moment, only the flow guide channel without the sealing ball is communicated, and the resistance formed by the hydraulic oil is larger.
Example 6
The door closer of this embodiment is similar to embodiment 5, as shown in fig. 15 and 16, except that the sealing ball is replaced by a flap 295 disposed at the position of the second cylindrical passage 292 near the annular step 293, the face of the flap 295 is capable of blocking the first cylindrical passage 291, and the rotating shaft of the flap 295 is disposed at the side of the annular step 293 near the second cylindrical passage 292. When the piston moves towards the front end, the baffle is pushed away towards the second cylindrical channel because the flow direction of the hydraulic oil is from the front cavity to the rear cavity, and the two flow guide channels are communicated; when the piston moves towards the rear end, the flow direction of the hydraulic oil is from the rear cavity to the front cavity, the baffle is pushed towards the first cylindrical channel and is blocked at the channel opening of the annular step to seal the flow guide channel, and only the flow guide channel without the baffle is communicated, so that the resistance formed by the hydraulic oil is larger in the state.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (10)
1. A door closer 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 sets gradually linkage part and acting part along length direction, wherein, the linkage part sets up in force application mechanism's one end, the linkage part includes the pivot of being connected with the rotor arm transmission and the transfer line that carries out the push-and-pull to the acting part through the transmission, the acting part includes inclosed casing and the adjacent damping portion of length direction and bullet portion of pushing away in the casing, the damping portion includes the piston rod, piston rod one end and transfer line swing joint, the other end is connected with the bullet portion of pushing away, the piston rod can be in the casing along linear motion and receive the damping effect in the motion through the transfer line transmission, the bullet portion of pushing away gives the piston rod with the motive force in the piston rod motion.
2. The door closer according to claim 1, wherein a piston is fixedly connected to an end of one end of the piston rod extending into the housing, an inner cavity of the housing is divided into a front cavity and a rear cavity by the piston, and the elastic pushing part is installed in the front cavity; the front cavity and the rear cavity are filled with damping media in a fluid form, 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, and at least one channel which is communicated to the cavity corresponding to the other end face through one end face is communicated with the piston to form a flow channel of the damping media.
3. A door closer 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, and a flow blocking ring is slidably inserted in the annular groove in the forward and backward directions, and the outer wall of the flow blocking ring is close to the inner wall of the housing; at least one drainage channel communicated to the annular groove is formed in one end face of the piston, an inner hole of the flow blocking ring is communicated with the drainage channel, a backflow channel is communicated in the piston, and openings of the backflow channel are respectively located on two end faces of the piston; when the flow blocking ring slides to one side close to one end face of the piston along the annular groove, the outer annular wall of the flow blocking ring blocks a gap between the end face and the shell.
4. A door closer according to claim 3, wherein the flow rate of the bleed duct per unit time is greater than the flow rate of the return duct when the flow duct is not closed.
5. The door closer of claim 2, wherein the outer wall of the piston is sealed with the inner wall of the housing, the piston has a plurality of flow guide channels therein, the front end surface and the rear end surface of the piston are respectively provided with a first channel and a second channel which are communicated with the flow guide channels, and the interior of part of the flow guide channels is provided with a one-way valve.
6. A door closer according to claim 5, wherein each flow leader is formed by joining a first cylindrical track and a second cylindrical track, wherein the first cylindrical track has a smaller inner diameter than the second cylindrical track, thereby forming an annular step at the junction of the two cylindrical tracks, and wherein a portion of the second cylindrical tracks of the plurality of flow leaders are provided with a movable sealing member having an outer diameter greater than the inner diameter of the first cylindrical track, the sealing member sealing off the first cylindrical track when the sealing member moves to the annular step.
7. The door closer of claim 1, wherein the linkage part comprises a cam in transmission connection with the rotating shaft, the cam is sleeved outside the rotating shaft, and the periphery of the cam is hinged with the transmission rod.
8. A door closer according to claim 1, wherein the linkage member comprises a link drivingly connected to the shaft, one end of the link being hinged to the shaft and the other end being hinged to the drive rod.
9. A door closer according to claim 1, wherein the urging portion comprises a compression or gas spring abutting an end of the piston rod of the damping portion.
10. A door closer according to any one of claims 1 to 9, wherein the damping medium is hydraulic oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911010982.1A CN110566073A (en) | 2019-10-22 | 2019-10-22 | Door closer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911010982.1A CN110566073A (en) | 2019-10-22 | 2019-10-22 | Door closer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110566073A true CN110566073A (en) | 2019-12-13 |
Family
ID=68785874
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911010982.1A Pending CN110566073A (en) | 2019-10-22 | 2019-10-22 | Door closer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110566073A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113323531A (en) * | 2021-05-31 | 2021-08-31 | 深圳市金裕仁实业有限公司 | Hydraulic self-closing hinge and hydraulic self-closing door |
| WO2023004877A1 (en) * | 2021-07-28 | 2023-02-02 | 箭牌家居集团股份有限公司 | Door closer |
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| JP2008038389A (en) * | 2006-08-02 | 2008-02-21 | Miwa Lock Co Ltd | Door closer |
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| CN113323531A (en) * | 2021-05-31 | 2021-08-31 | 深圳市金裕仁实业有限公司 | Hydraulic self-closing hinge and hydraulic self-closing door |
| WO2023004877A1 (en) * | 2021-07-28 | 2023-02-02 | 箭牌家居集团股份有限公司 | Door closer |
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