CN214145143U

CN214145143U - Speed adjustable door and window closer

Info

Publication number: CN214145143U
Application number: CN202022941632.1U
Authority: CN
Inventors: 赵锦攀; 黄申
Original assignee: Zhaoqing Yuxing Gated Co ltd
Current assignee: Zhaoqing Yuxing Gated Co ltd
Priority date: 2020-12-10
Filing date: 2020-12-10
Publication date: 2021-09-07
Anticipated expiration: 2030-12-10

Abstract

The utility model discloses a speed-adjustable door and window closer, which comprises a housin, the cam assembly, the connecting rod, piston and spring, the cam assembly, the connecting rod, in the casing was all located to piston and spring, the one end of connecting rod was fixed with the cam assembly, the other end and piston connection, the one end and the piston butt of spring, the other end and casing looks butt, the both sides of piston are equipped with first oil pocket and the second oil pocket that is linked together respectively, the spring is located the second oil intracavity, be equipped with the recess on the piston, be equipped with the oil circuit on the casing, be equipped with the governing valve on the recess, first oil pocket can communicate with the second oil pocket through oil circuit and recess. The cam assembly is arranged, so that the connection of the connecting rod can be facilitated, and the cam assembly and the connecting rod can be always connected; the speed regulating valve is arranged, when the door and window are gradually closed, the flow speed of the hydraulic oil on the groove is controlled by regulating the speed regulating valve, and the flow speed of the hydraulic oil in the first oil cavity to the second oil cavity is controlled, so that the closing speed of the door and window is controlled, the regulation is convenient, and different use requirements are met.

Description

Speed adjustable door and window closer

Technical Field

The utility model belongs to a closer especially relates to a speed-adjustable door and window closer.

Background

When the speed-adjustable door and window closer is used, doors and windows are installed on a rotating shaft of the cam, the cam is driven to rotate through the rotation of the doors and windows, and the opening angle of the doors and windows is positioned through the cam when the door and window closer is positioned. When the existing cam is installed, the cam is directly contacted with the piston and pushes the piston to move through the cam; when the farthest end of the cam is contacted with the piston, the spring in the closer is compressed under the action of the piston, and the door and the window are positioned under the action of the cam; when the door leaf continues to rotate and drives the cam to rotate, the cam directly rotates over the highest point, and the closing device is internally provided with the piston which is slower than the cam in speed due to the action of hydraulic pressure and the spring, so that the cam is separated from the piston easily, and the normal use of the cam is influenced. Meanwhile, the existing cam is only suitable for installing left or right doors and windows singly, the application range is limited, and the production cost is increased.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a can solve at least one adjustable speed door and window closer in the above-mentioned problem.

According to the utility model discloses an aspect provides adjustable speed door and window closer, which comprises a housin, the cam subassembly, the connecting rod, piston and spring are all located in the casing, the one end of connecting rod is fixed with the cam subassembly, the other end and piston connection, the one end and the piston butt of spring, the other end and casing looks butt, the both sides of piston are equipped with first oil pocket and the second oil pocket that is linked together respectively, the spring is located the second oil pocket, be equipped with the recess on the piston, be equipped with the oil circuit on the casing, be equipped with the governing valve on the recess, first oil pocket can communicate with the second oil pocket through oil circuit and recess.

The utility model has the advantages that: the cam assembly is arranged, so that the connecting rod can be conveniently connected, the connecting rod can be conveniently driven to move by the cam assembly when the door and window rotates, and then the piston is pushed, so that the cam assembly and the connecting rod can be always connected; through being equipped with the governing valve on the recess, consequently, door and window is when closing gradually, through adjusting the governing valve, can control the velocity of flow of hydraulic oil on the recess, and the hydraulic oil of control first oil pocket flows speed to the second oil pocket to control door and window's closing speed, it is convenient to adjust, satisfies different operation requirements.

In some embodiments, the groove includes a first groove and a second groove, the speed control valve is disposed on the first groove or the second groove, the oil path is provided with a first oil port, a second oil port and a third oil port, the first oil port, the second oil port and the third oil port are communicated with each other, the front end of the piston is provided with an oil return portion, the first groove, the second groove and the oil return portion are respectively provided with a fourth oil port, a fifth oil port and a sixth oil port, the outer diameter of the oil return portion is smaller than the outer diameter of the piston, the outer diameter of the oil return portion is smaller than the outer diameters of the first groove and the second groove, the first oil port corresponds to the fourth oil port, the second oil port corresponds to the fifth oil port, and the third oil port corresponds to the sixth oil port. Therefore, the speed regulating valve is arranged on the first groove or the second groove, and the flowing speed of the hydraulic oil on the first groove or the second groove can be correspondingly regulated, so that the closing speed of the door and window at a corresponding angle can be regulated, the closing speed of the door and window can be regulated, and the use requirements of different occasions can be met. Meanwhile, the flowing speed of hydraulic oil in the first oil cavity and the second oil cavity is realized by controlling the depth of the two grooves, so that the closing speed of the door and window can be further adjusted.

In some embodiments, the cam assembly comprises a cam and a cam outer frame, one end of the cam is arranged in the casing, the other end of the cam extends out after penetrating through the casing, the cam outer frame is provided with a mounting hole, the cam is arranged in the mounting hole, the front side of the cam outer frame is provided with a clamping groove, one end of the connecting rod is provided with a connecting head, and the connecting head is clamped into the clamping groove. Therefore, the cam outer frame is arranged, and the connecting rod is fixed with the cam outer frame, so that when the door leaf drives the cam to rotate, the cam pushes the cam outer frame to move, and the cam outer frame pushes the connecting rod to move together, so that the piston keeps moving synchronously, the phenomenon that the cam is separated from the piston due to the fact that the piston return speed is slower than the cam speed under the action of hydraulic pressure and a spring is effectively avoided, the normal use of the cam is ensured, and the effect of buffering the closing speed of the door window is achieved; the cam outer frame is arranged on the inner side of the shell and is tightly attached to the inner wall of the shell to prevent the cam outer frame from falling off, so that the distance between the position of the cam extending out of the shell and the corresponding side edge of the shell is greatly reduced, seamless splicing between the door and window after installation and a door frame or a window frame can be realized, the phenomenon of clamping the door and window in use is avoided, and the use safety is improved; the connecting rod is provided with a clamping groove which can be fixed in the clamping groove through the connector, so that the connecting rod is convenient to be connected with the cam outer frame.

In some embodiments, the speed-adjustable door and window closer further comprises a connecting screw, the other end of the connecting rod is provided with a threaded hole, one end of the connecting screw is located in the piston, and the other end of the connecting screw extends out of the piston and then is matched with the threaded hole of the connecting rod. Therefore, the piston and the connecting rod are conveniently connected and fixed through the connecting screw.

In some embodiments, the speed adjustable door and window closer further comprises a spring ejector, one end of the spring ejector abuts against the piston, and the other end of the spring ejector abuts against the spring. Therefore, the spring ejector rod is arranged, the piston pushes the spring ejector rod to move when moving, the spring is pushed through the spring ejector rod, and meanwhile acting force of the spring is conveniently transmitted to the piston through the spring ejector rod.

In some embodiments, the speed-adjustable door and window closer further comprises a rear cover and a force adjusting device, the force adjusting device comprises a force adjusting plate and a force adjusting rod, the rear cover is matched with the end face of the shell, a threaded hole is formed in the force adjusting plate, the force adjusting plate is abutted to the spring, the force adjusting rod is provided with an external thread, the force adjusting rod is matched with the threaded hole of the force adjusting plate, and one end of the force adjusting rod is located on the rear cover. From this, through rotating the accent power pole, can make the accent power board remove on the accent power pole to the degree that compresses tightly of control accent power board and spring, the dynamics of the regulation spring of being convenient for satisfies different operation requirements.

In some embodiments, the cam includes a body, a rotation shaft and an installation shaft, the rotation shaft and the installation shaft are respectively disposed at two ends of the body, the installation shaft is matched with the housing, the rotation shaft is located at an outer side of the housing, the body is matched with the installation hole, a rear wall of the installation hole is provided with a protrusion, the protrusion includes a horizontal plane, a third inclined plane and a fourth inclined plane, the third inclined plane and the fourth inclined plane are respectively disposed at two ends of the horizontal plane, the horizontal plane is parallel to a front wall of the installation hole, and an included angle between the third inclined plane and the horizontal plane is equal to an included. Therefore, the cam can be conveniently positioned under the combined action of the body and the protrusions through the protrusions, and accordingly the door and window opening angle can be positioned.

In some embodiments, the body includes arcwall face, first inclined plane and second inclined plane, and the both ends of arcwall face are located respectively to the one end on first inclined plane and the one end on second inclined plane, and the other end on first inclined plane coincides with the other end on second inclined plane, and the contained angle of first inclined plane and arcwall face equals the contained angle of second inclined plane and arcwall face, and the third inclined plane can laminate with first inclined plane, and the fourth inclined plane can laminate with the second inclined plane. Therefore, the cam can conveniently rotate by arranging the arc-shaped surface; the first inclined plane and the second inclined plane are arranged, so that the cam outer frame can be conveniently acted with the bulge on the rear wall and the front wall of the mounting hole, the cam outer frame can be pushed to move back and forth under the action of the cam, the cam can be conveniently positioned, the body can be conveniently mounted on two sides of the bulge, and the rotation and reversing of the cam are convenient; meanwhile, the phenomenon of locking of the cam when the cam rotates is effectively avoided, and meanwhile, the stability of the cam during positioning is improved and the positioning force is improved through the cooperation of the surface and the surface.

In some embodiments, the bottom of pivot is equipped with the backup pad, and the backup pad is circular, and the external diameter of backup pad is greater than the external diameter of pivot, and the external diameter of backup pad is unanimous with the external diameter of arcwall face, and the body is located between backup pad and the installation axle. From this, be equipped with the backup pad, can make things convenient for the cooperation of body and mounting hole, and make things convenient for the installation of cam and door and window.

In some embodiments, the axis of the rotating shaft, the center of the supporting plate and the axis of the rotating shaft are on the same straight line, a coincident line of the other end of the first inclined plane and the other end of the second inclined plane coincides with the axis of the rotating shaft, the length of the mounting hole in the cam outer frame is greater than or equal to the diameter of a circle where the arc-shaped plane is located, and the distance between the protrusion and the front wall of the mounting hole is equal to the radius of the circle where the arc-shaped plane is located. Therefore, the cam can be conveniently rotated, and the left and right adjustment of the cam to the installation direction is convenient; when can make things convenient for the cam to rotate bellied opposite side, the normal rotation of cam to and guarantee that the body of cam can be used in the antetheca of arch and mounting hole, be convenient for promote the cam frame and normally remove.

Drawings

Fig. 1 is a schematic structural view of the speed-adjustable door and window closer of the present invention;

FIG. 2 is a schematic cross-sectional view of the adjustable speed door and window closer of the present invention along the oil outlet of the housing;

FIG. 3 is an exploded view of the adjustable speed door and window closer of the present invention;

fig. 4 is a schematic structural view of a piston in the speed-adjustable door and window closer of the present invention;

FIG. 5 is a schematic structural view of a cam assembly of the adjustable speed door and window closer of the present invention;

fig. 6 is a schematic structural view of a cam in the speed-adjustable door/window closer of the present invention;

fig. 7 is a schematic structural view of another angle of the cam in the speed-adjustable door/window closer of the present invention;

fig. 8 is a schematic structural view of the cam outer frame of the speed-adjustable door/window closer of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Refer to fig. 1 to 8. Speed-adjustable door and window closer, which comprises a housin 1, cam subassembly 2, connecting rod 3, piston 4 and spring 5 are all located in casing 1, cam subassembly 2 includes cam 21 and cam frame 22, the one end of cam 21 is located in casing 1, the other end runs through and stretches out behind the casing 1, cam frame 22 is equipped with mounting hole 221, cam 21 is located in mounting hole 221, the one end and the cam frame 22 of connecting rod 3 are fixed, the other end is connected with piston 4, the one end and the 4 butt of piston 5, the other end and 1 looks butt of casing, the both sides of piston 4 are equipped with first oil pocket 11 and the second oil pocket 12 that are linked together respectively. Wherein the first oil chamber 11 is located on the cam 21 side, and the second oil chamber 12 is located on the spring 5 side.

When the speed-adjustable door and window closer is used, a door and a window are arranged on the cam 21, the cam 21 is driven to rotate through the rotation of the door and the window, when the door and the window are opened, the cam 21 pushes the cam outer frame 22 to move towards one side of the piston 4, so that the connecting rod 3 is driven to move, the connecting rod 3 pushes the piston 4 to move, so that the piston 4 pushes the spring 5, and the spring 5 is gradually compressed; at the same time, the hydraulic oil in the second oil chamber 12 is gradually pressed to the first oil chamber 11. On the contrary, when the door and window is gradually closed, the piston 4 moves reversely under the action of the resilience of the spring 5, and the hydraulic oil flows into the second oil chamber 12 from the first oil chamber 11.

The piston 4 is provided with a groove 20, the shell 1 is provided with an oil path 30, the groove 20 is provided with a speed regulating valve 40, and the first oil chamber 11 can be communicated with the second oil chamber 12 through the oil path 30 and the groove 20.

The groove 20 includes a first groove 41 and a second groove 42, the speed control valve 40 is disposed on the first groove 41 or the second groove 42, the oil path is provided with a first oil port 13, a second oil port 14 and a third oil port 15, the first oil port 13, the second oil port 14 and the third oil port 15 are communicated with each other, the front end of the piston 4 is provided with an oil return portion 43, the first groove 41, the second groove 42 and the oil return portion 43 are respectively provided with a fourth oil port 45, a fifth oil port 46 and a sixth oil port 47, the outer diameter of the oil return portion 43 is smaller than the outer diameter of the piston 4, the outer diameter of the oil return portion 43 is smaller than the outer diameters of the first groove 41 and the second groove 42, the first oil port 13 corresponds to the fourth oil port 45, the second oil port 14 corresponds to the fifth oil port 46, and the third oil port 15 corresponds to the sixth oil port 47.

In some embodiments, one end of the speed regulating valve 40 is mounted on the housing 1, and the other end is mounted on the first groove 41, and by adjusting the speed regulating valve 40, the flow speed of the hydraulic oil on the first groove 41 can be adjusted; therefore, when the door and window can be controlled to be closed, when the piston moves to the first groove 41 to be communicated with the oil path 30, the flowing speed of the hydraulic oil can be adjusted through the speed regulating valve 40, and therefore the corresponding closing angle of the door and window can be adjusted. Similarly, in other embodiments, one end of the speed regulating valve 40 is mounted on the housing 1, and the other end is mounted on the second groove 42, and the flow speed of the hydraulic oil in the second groove 42 can be adjusted by adjusting the speed regulating valve 40; therefore, when the door and window can be controlled to be closed, when the piston moves to the second groove 42 to be communicated with the oil path 30, the flowing speed of the hydraulic oil can be adjusted through the speed regulating valve 40, and therefore the corresponding closing angle of the door and window can be adjusted.

Specifically, when the door and window is opened, the cam 21 drives the piston 4 to move towards the second oil chamber 12, so that the hydraulic oil in the second oil chamber 12 moves towards the first oil chamber 11; in order to increase the closing speed of the door and window, the middle part of the piston 4 is provided with a through hole, the through hole is provided with a one-way valve 10, and when the door and window is opened, the one-way valve 10 is opened under the action of oil pressure, so that hydraulic oil in the second oil cavity 12 can rapidly enter the first oil cavity 11 through the through hole, and the opening speed of the door and window is met. When the door and window is gradually closed from the opening angle of 90 degrees, the spring 5 rebounds to drive the piston 4 to move towards one side of the first oil cavity 11, hydraulic oil moves towards the second oil cavity 12 through the first oil cavity 11, and when the hydraulic oil flows, the hydraulic oil flows to the third oil cavity 15 through the sixth oil hole 47, then flows to the first groove 41 through the first oil hole 13 and flows to the second oil cavity 12 through the fourth oil hole 45; as the door and window is continuously closed, the piston 4 continuously moves, so that the second recess 42 moves to the second oil port 14, and the hydraulic oil flows to the third oil port 15 through the sixth oil port 47, then flows to the second recess 42 through the second oil port 14, and then flows to the second oil chamber 12 through the fifth oil port 46. In the actual use process, the depth of the first groove 41 and/or the second groove 42 can be increased or decreased according to the closing speed requirement of the corresponding angle during closing, and the larger the depth of the corresponding groove is, the larger the flow speed of the hydraulic oil is, and the faster the closing speed of the door and window is; conversely, the smaller the depth of the corresponding groove is, the smaller the flow speed of the hydraulic oil is, and the slower the closing speed of the door window is. Thereby realizing the two-stage speed regulation of the closing speed of the door and the window.

The front side of the cam outer frame 22 is provided with a slot 222, one end of the connecting rod 3 is provided with a connector 31, and the connector 31 is clamped into the slot 222. The connector 31 and the connecting rod 3 are of an integrated structure, so that the connector 31 is convenient to form and process; the outer diameter of the connector 31 is larger than the outer diameter of the rest part of the connecting rod 3, so that the connector 31 is conveniently clamped in the clamping groove 222, and the cam outer frame 22 is connected with the connecting rod 3.

The utility model discloses a speed-adjustable door and window closer still includes connecting screw 6, and the other end of connecting rod 3 is equipped with the screw hole, and 6 one end of connecting screw are located piston 4, and the other end stretches out behind the piston 4 and cooperates with the screw hole of connecting rod 3. When the connecting screw 6 is tightly screwed with the threaded hole of the connecting rod 3, the connecting screw 6 and the connecting rod 3 clamp the end face of the piston 4, so that the connecting rod 3 is fixedly connected with the piston 4.

The speed-adjustable door and window closer further comprises a spring ejector rod 7, one end of the spring ejector rod 7 is abutted with the piston 4, and the other end of the spring ejector rod 7 is abutted with the spring 5. The cross section of the spring ejector rod 7 is T-shaped, the outer end face of the large end of the spring ejector rod 7 is abutted to the piston 4, and the inner end face of the large end of the spring ejector rod 7 is abutted to the spring 5. In the actual use process, in order to facilitate the abutting of the spring ejector rod 7 and the piston 4, a step surface is arranged on the inner wall of the piston 4, and one end of the spring ejector rod 7 abuts against the step surface in the piston 4, so that the transmission of force is facilitated.

The utility model discloses a but speed governing door and window closer still includes back lid 8 and accent power device 9, and accent power device 9 is including accent power board 91 and accent power pole 92, and back lid 8 cooperatees with casing 1's terminal surface, is equipped with the screw hole on the accent power board 91, and accent power board 91 and spring 5 looks butt, accent power pole 92 are equipped with the external screw thread, and accent power pole 92 cooperates with the screw hole of accent power board 91, and the one end of accent power pole 92 is located back lid 8. The cross section of the force adjusting rod 92 is T-shaped, the small end of the force adjusting rod 92 is provided with an external thread, the large end of the force adjusting rod 92 is mounted on the rear cover 8, and the large end of the force adjusting rod 92 is mounted on the rear cover 8. This accent power device 9 is when adjusting, through rotating accent power pole 92 for accent power board 91 relative accent power pole 92 back-and-forth movement, thereby make accent power board 91 to spring 5 one side or keep away from spring 5 one side and remove, thereby adjust spring 5's bounce-back dynamics, and then control door and window's closing speed.

A first groove 41 and a second groove 42 are arranged on the piston 4, a first oil port 13, a second oil port 14 and a third oil port 15 are arranged on the housing 1, the first oil port 13, the second oil port 14 and the third oil port 15 are communicated with each other, an oil return part 43 is arranged at the front end of the piston 4, a fourth oil port 45, a fifth oil port 46 and a sixth oil port 47 are respectively arranged on the first groove 41, the second groove 42 and the oil return part 43, the outer diameter of the oil return part 43 is smaller than that of the piston 4, the outer diameter of the oil return part 43 is smaller than that of the first groove 41 and that of the second groove 42, the first oil port 13 corresponds to the fourth oil port 45, the second oil port 14 corresponds to the fifth oil port 46, and the third oil port 15 corresponds to the sixth oil port 47.

When the door and window is opened, the cam 21 drives the piston 4 to move towards the second oil chamber 12 side, so that the hydraulic oil in the second oil chamber 12 moves towards the first oil chamber 11 side; in order to increase the closing speed of the door and window, the middle part of the piston 4 is provided with a through hole, the through hole is provided with a one-way valve 10, and when the door and window is opened, the one-way valve 10 is opened under the action of oil pressure, so that hydraulic oil in the second oil cavity 12 can rapidly enter the first oil cavity 11 through the through hole, and the opening speed of the door and window is met. When the door and window is gradually closed from the opening angle of 90 degrees, the spring 5 rebounds to drive the piston 4 to move towards one side of the first oil cavity 11, hydraulic oil moves towards the second oil cavity 12 through the first oil cavity 11, and when the hydraulic oil flows, the hydraulic oil flows to the third oil cavity 15 through the sixth oil hole 47, then flows to the first groove 41 through the first oil hole 13 and flows to the second oil cavity 12 through the fourth oil hole 45; as the door and window is continuously closed, the piston 4 continuously moves, so that the second recess 42 moves to the second oil port 14, and the hydraulic oil flows to the third oil port 15 through the sixth oil port 47, then flows to the second recess 42 through the second oil port 14, and then flows to the second oil chamber 12 through the fifth oil port 46. In the actual use process, the depth of the first groove 41 and/or the second groove 42 can be increased or decreased according to the closing speed requirement of the corresponding angle during closing, and the larger the depth of the corresponding groove is, the larger the flow speed of the hydraulic oil is, and the faster the closing speed of the door and window is; conversely, the smaller the depth of the corresponding groove is, the smaller the flow speed of the hydraulic oil is, and the slower the closing speed of the door window is. Thereby realizing the two-stage speed regulation of the closing speed of the door and the window.

The cam 21 comprises a body 211, a rotating shaft 212 and a mounting shaft 213, the rotating shaft 212 and the mounting shaft 213 are respectively arranged at two ends of the body 211, the mounting shaft is matched with the shell, the rotating shaft is positioned at the outer side of the shell, the body 211 is matched with a mounting hole 221, and a bulge 223 is arranged on the rear wall 225 of the mounting hole 221. Therefore, the cam outer frame 2 is arranged and connected with the piston 4 through the cam outer frame 22, so that the movement of the piston 4 is kept consistent with the movement of the cam outer frame 22 and the movement of the cam 21, and the stability of the movement transmission of the cam 21 is improved; through being equipped with arch 2223 in mounting hole 221 for the body 211 of cam installs the back in mounting hole 221, through mounting hole 221 inner wall and protruding 223 combined action, can make the cam drive cam frame 22 and rotate when rotating, and through the effect of protruding 223 with body 211, realize the positioning action to body 211, thereby realized the positioning action of cam 21 to door and window, convenient to use, positional stability is high. When the cam 21 and the cam outer frame 22 are assembled, the body 211 is inserted into the mounting hole 221 and positioned at one side of the projection 223; the bottom end of the cam 21 is arranged on the shell 1 through the mounting shaft 213, so that the rotation of the cam 21 is facilitated; the rotating shaft 213 is matched with the door window, so that the door window can drive the rotating shaft 212 to rotate, the rotation of the cam 21 is realized, and the door window is positioned by positioning the cam 21 on the cam outer frame 22.

The utility model discloses a but speed governing door and window closer can be used to the location when door and window opening angle is 90, through the effect of body 211 with arch 223, mounting hole 221 inner wall, realizes being 90 location to door and window opening angle.

The protrusion 223 includes a horizontal surface 2231, a third inclined surface 2232 and a fourth inclined surface 2233, the third inclined surface 2232 and the fourth inclined surface 2233 are respectively disposed at two ends of the horizontal surface 2231, the horizontal surface 2231 is parallel to the front wall 224 of the mounting hole 221, and an included angle between the third inclined surface 2232 and the horizontal surface 2231 is equal to an included angle between the fourth inclined surface 2233 and the horizontal surface 2231.

The body 211 comprises an arc-shaped surface 2111, a first inclined surface 2112 and a second inclined surface 2113, one end of the first inclined surface 2112 and one end of the second inclined surface 2113 are respectively arranged at two ends of the arc-shaped surface 2111, the other end of the first inclined surface 2112 coincides with the other end of the second inclined surface 2113, the included angle between the first inclined surface 2112 and the arc-shaped surface 2111 is equal to the included angle between the second inclined surface 2113 and the arc-shaped surface 2111, the third inclined surface 2232 can be attached to the first inclined surface 2112, and the fourth inclined surface 2233 can be attached to the second inclined surface 2113. The connection part of the first inclined surface 2112 and the arc-shaped surface 2111 is connected through a transition arc, so that the stable transition of the first inclined surface and the arc-shaped surface is facilitated; the connection part of the second inclined surface 2113 and the arc-shaped surface 2111 is connected through a transition arc, so that the smooth transition of the second inclined surface and the arc-shaped surface is facilitated. Since the angle between the first inclined surface 2112 and the arc surface 2111 is equal to the angle between the second inclined surface 2113 and the arc surface 2111, the left or right side of the projection 223 is convenient for the installation of the cam 21, even if the reverse installation of the cam 21 is facilitated.

Therefore, the cam 21 can be conveniently rotated by arranging the arc-shaped surface 2111; by providing the first inclined surface 2112 and the second inclined surface 2113, the cam outer frame 22 is pushed to move back and forth under the action of the cam 21, and the positioning of the cam 21 is facilitated, which is facilitated to interact with the boss 223 on the rear wall and the front wall of the mounting hole 221.

The bottom of pivot 212 is equipped with support plate 214, and support plate 214 is circular, and the external diameter of support plate 214 is greater than the external diameter of pivot 212, and the external diameter of support plate 214 is unanimous with the external diameter of arcwall face 2111, and body 211 is located between support plate 214 and installation axle 213. By arranging the support plate 214, and the outer diameter of the support plate 214 is consistent with that of the arc-shaped surface 2111, the rotating shaft 212 can be limited above the mounting hole 221, so that the mounting of the rotating shaft 212 and a door window is facilitated; meanwhile, the body 211 can be conveniently driven to rotate stably in the mounting hole 221 through the rotating shaft 212.

The axis of the rotating shaft 212, the center of the supporting plate 214 and the axis of the rotating shaft are on the same straight line, and the line of coincidence of the other end of the first inclined surface 2112 and the other end of the second inclined surface 2113 coincides with the axis of the rotating shaft 212, so that the cam 21 rotates along the axis of the rotating shaft 212 when rotating, namely the first inclined surface 2112 and the second inclined surface 2113 are positioned on the same side of the axis of the rotating shaft 212, and the rotation of the rotating shaft 212 is facilitated to drive the body 211 to change direction. The length of the mounting hole 221 in the cam outer frame 22 is greater than or equal to the diameter of the circle where the arc-shaped surface 2111 is located, and the distance between the protrusion 223 and the front wall 224 of the mounting hole 221 is equal to the radius of the circle where the arc-shaped surface 2111 is located. Thereby, it is convenient for the cam 21 to rotate to the other side of the projection 223, and ensure that the body of the cam 21 can act on the front wall of the projection 223 and the mounting hole 221, which is convenient for pushing the cam outer frame 22 to move normally.

Wherein, the protrusion 223 and the cam frame 22 are formed as an integral structure. Therefore, the body 211 and the protrusion 223 can be conveniently acted, the body 211 can be stably acted with the protrusion 223 on the left side and the right side of the protrusion 223, and the installation direction of the cam 21 can be conveniently adjusted.

Third inclined surface 2232 may be in contact with first inclined surface 2112, and fourth inclined surface 22333 may be in contact with second inclined surface 2113. From this, effectively avoided cam 21 dead phenomenon of card to appear when rotating, simultaneously, through the cooperation of face with the face, stability when having improved cam 21 location improves the positioning force.

When the cam 21 is installed at the left side of the installation hole 321, and is suitable for doors and windows with corresponding side opening angles, the specific process of the cam 31 in the opening and closing state of the door leaf is as follows:

when the door and window is in a closed state, the first inclined surface 2112 of the body 211 is in contact with the projection 223 at the transition section of the arc-shaped surface 2111, and the second inclined surface 2113 is in contact with the front wall 224 of the mounting hole 321; with the opening of the door and window, the door and window drives the cam 21 to rotate, the first inclined surface 2112 is in contact with the third inclined surface 2232 of the protrusion 22, and the second inclined surface 2113 rotates gradually, so that the second inclined surface 2113 and the transition section of the arc-shaped surface 2111 interact with the front wall 224 of the mounting hole 321, and the second inclined surface 2113 and the transition section of the arc-shaped surface 2111 push the cam outer frame 23 to move forward relative to the cam 21. With the continuous opening of the door and window, when the opening angle reaches 90 °, the junction of the first inclined surface 2112 and the second inclined surface 2113 rotates to the horizontal plane 2231 of the protrusion 223, and the protrusion 22 prevents the door and window from being further opened, thereby realizing the positioning of the door and window when the opening angle is 90 °. The speed-adjustable door and window closer is suitable for doors and windows with a one-way door opening angle of 90 degrees.

When the opening direction of the door/window is toward the other side, the cam 21 needs to be installed on the right side of the installation hole 321, before the door/window is installed, an external tool such as a wrench is used for acting on the rotating shaft 212 to rotate the rotating shaft 212, when the external force drives the cam 21 to rotate to the position where the opening angle of the door/window is 90 degrees, the rotating shaft 212 is continuously pulled by a large external force, so that the external force overcomes the resistance of the junction of the protrusion 223 and the first inclined surface 2112 and the second inclined surface 2113, and the cam 21 rotates to the right side of the installation hole 321. The principle of positioning the door and window by the cam 21 in this state is the same as that of the cam 21, and specifically comprises the following steps:

when the door and window is in a closed state, the second inclined surface 2113 of the body 211 and the transition section of the arc-shaped surface 2111 are in contact with the projection 223, and the first inclined surface 2112 is in contact with the front wall 224 of the mounting hole 321; along with the opening of the door and window, the door and window drives the cam 21 to rotate, the second inclined surface 2113 is in contact with the fourth inclined surface 2233 of the protrusion 22, and the first inclined surface 2112 rotates gradually, so that the transition section of the first inclined surface 2112 and the arc-shaped surface 2111 is acted with the front wall 224 of the mounting hole 321, and the first inclined surface 2112 and the transition section of the arc-shaped surface 2111 push the cam outer frame 22 to move forward relative to the cam 21. With the continuous opening of the door and window, when the opening angle reaches 90 degrees, the junction of the first inclined surface 2112 and the second inclined surface 2113 rotates to the horizontal plane 221 of the protrusion 223, the door and window is prevented from being further opened by the protrusion 223, and therefore the door and window is positioned when the opening angle is 90 degrees.

The above is only the preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, many variations and modifications can be made without departing from the inventive concept, and these all fall into the protection scope of the present invention.

Claims

1. The speed-adjustable door and window closer is characterized by comprising a shell (1), a cam component (2), a connecting rod (3), a piston (4) and a spring (5), the cam component (2), the connecting rod (3), the piston (4) and the spring (5) are all arranged in the shell (1), one end of the connecting rod (3) is fixed with the cam component, the other end is connected with the piston (4), one end of the spring (5) is abutted with the piston (4), the other end is abutted with the shell (1), a first oil chamber (11) and a second oil chamber (12) which are communicated with each other are respectively arranged at the two sides of the piston (4), the spring (5) is positioned in the second oil chamber (12), the piston (4) is provided with a groove (20), an oil way (30) is arranged on the shell (1), a speed regulating valve (40) is arranged on the groove (20), the first oil chamber (11) can be communicated with the second oil chamber (12) through an oil passage (30) and a groove (20).

2. The speed-adjustable door and window closer as claimed in claim 1, wherein the groove (20) comprises a first groove (41) and a second groove (42), the speed-adjusting valve is disposed on the first groove or the second groove, the oil circuit is provided with a first oil port (13), a second oil port (14) and a third oil port (15), the first oil port (13), the second oil port (14) and the third oil port (15) are communicated with each other, the front end of the piston (4) is provided with an oil return portion (43), the first groove (41), the second groove (42) and the oil return portion (43) are respectively provided with a fourth oil port (45), a fifth oil port (46) and a sixth oil port (47), the outer diameter of the oil return portion (43) is smaller than the outer diameter of the piston (4), the outer diameter of the oil return portion (43) is smaller than the outer diameters of the first groove (41) and the second groove (42), and the first oil port (13) corresponds to the fourth oil port (45), the second oil port (14) corresponds to a fifth oil port (46), and the third oil port (15) corresponds to a sixth oil port (47).

3. The speed-adjustable door and window closer as claimed in claim 2, wherein the cam assembly (2) comprises a cam (21) and a cam outer frame (22), one end of the cam (21) is arranged in the casing (1), the other end of the cam penetrates through the casing (1) and then extends out, the cam outer frame (22) is provided with a mounting hole (221), the cam (21) is arranged in the mounting hole (221), the front side of the cam outer frame (22) is provided with a clamping groove (222), one end of the connecting rod (3) is provided with a connecting head (31), and the connecting head (31) is clamped into the clamping groove (222).

4. The speed-adjustable door and window closer as claimed in claim 3, further comprising a connecting screw (6), wherein a threaded hole is formed in the other end of the connecting rod (3), one end of the connecting screw (6) is located in the piston (4), and the other end of the connecting screw extends out of the piston (4) and then is matched with the threaded hole of the connecting rod (3).

5. The adjustable speed door and window closer according to claim 4, further comprising a spring push rod (7), wherein one end of the spring push rod (7) abuts against the piston (4), and the other end abuts against the spring (5).

6. The speed-adjustable door and window closer as claimed in any one of claims 1 to 5, further comprising a rear cover (8) and a force adjusting device (9), wherein the force adjusting device (9) comprises a force adjusting plate (91) and a force adjusting rod (92), the rear cover (8) is matched with the end surface of the housing (1), a threaded hole is formed in the force adjusting plate (91), the force adjusting plate (91) abuts against the spring (5), the force adjusting rod (92) is provided with an external thread, the force adjusting rod (92) is matched with the threaded hole of the force adjusting plate (91), and one end of the force adjusting rod (92) is located on the rear cover (8).

7. The adjustable speed door and window closer of claim 5, wherein the cam (21) comprises a body (211), a rotating shaft (212), and a mounting shaft (213), the rotating shaft (212) and the mounting shaft (213) are respectively arranged at two ends of the body (211), the mounting shaft is matched with the shell, the rotating shaft is positioned at the outer side of the shell, the body (211) is matched with the mounting hole (221), the rear wall (225) of the mounting hole (221) is provided with a bulge (223), the protrusion (223) comprises a horizontal surface (2231), a third inclined surface (2232) and a fourth inclined surface (2233), the third inclined surface (2232) and the fourth inclined surface (2233) are respectively arranged at two ends of the horizontal surface (2231), the horizontal plane (2231) is parallel to the front wall (224) of the mounting hole (221), the included angle between the third inclined surface (2232) and the horizontal plane (2231) is equal to the included angle between the fourth inclined surface (2233) and the horizontal plane (2231).

8. The speed-adjustable door and window closer according to claim 7, wherein the body (211) comprises an arc-shaped surface (2111), a first inclined surface (2112) and a second inclined surface (2113), one end of the first inclined surface (2112) and one end of the second inclined surface (2113) are respectively arranged at two ends of the arc-shaped surface (2111), the other end of the first inclined surface (2112) is overlapped with the other end of the second inclined surface (2113), an included angle between the first inclined surface (2112) and the arc-shaped surface (2111) is equal to an included angle between the second inclined surface (2113) and the arc-shaped surface (2111), the third inclined surface (2232) can be attached to the first inclined surface (2112), and the fourth inclined surface (2233) can be attached to the second inclined surface (2113).

9. The adjustable speed door and window closer according to claim 8, wherein a support plate (214) is disposed at the bottom of the rotating shaft (212), the support plate (214) is circular, the outer diameter of the support plate (214) is larger than the outer diameter of the rotating shaft (212), the outer diameter of the support plate (214) is consistent with the outer diameter of the arc-shaped surface (2111), and the body (211) is located between the support plate (214) and the mounting shaft (213).

10. The speed-adjustable door and window closer as claimed in claim 9, wherein the axis of the rotating shaft (212), the center of the supporting plate (214) and the axis of the rotating shaft are on the same straight line, a line of coincidence between the other end of the first inclined surface (2112) and the other end of the second inclined surface (2113) coincides with the axis of the rotating shaft (212), the length of the mounting hole (221) in the cam housing (22) is greater than or equal to the diameter of a circle on which the arc-shaped surface (2111) is located, and the distance between the protrusion (223) and the front wall (224) of the mounting hole (221) is equal to the radius of the circle on which the arc-shaped surface (2111) is located.