Hidden door closer

Abstract

The utility model discloses a hidden door closer which comprises a door closer main body and a supporting seat, and the door closer main body is provided with a first rotating shaft capable of resetting; the supporting seat is connected with the door closer body and provided with a second rotating shaft, and the end of the first rotating shaft extends into the supporting seat and is connected with the second rotating shaft. Wherein a supporting face is arranged in the supporting seat, the second rotating shaft is provided with a positioning table, a plane thrust bearing is arranged between the positioning table and the supporting face, a tight ring of the plane thrust bearing is attached to the supporting face, a loose ring of the plane thrust bearing is arranged on the second rotating shaft in a sleeving mode and abuts against the positioning table, and the loose ring is located below the tight ring. The supporting base is matched with the plane thrust bearing, so that the hidden door closer can be normally installed at the top end of a hinged door for use and can also be installed at the bottom end of a door body, a heaven and earth shaft structure is replaced to enable a door plate to rotate, meanwhile, the hidden door closer is not affected to control the door body to reset, and the application range of the door closer is effectively expanded.

Description

Technical Field

[0001] The utility model relates to the technical field of door closers, in particular to a hidden door closer. Background Art

[0002] The existing door closer mainly compresses the spring through the internal rotating shaft and other transmission structures, and then the door body is reset through the cooperation of the spring and the oil chamber. Since the rotating shaft of the door closer is not dedicated to load-bearing, in order to ensure the normal use of the door closer, the existing door closer is usually installed on the top of the hinged door (i.e., the door body with one side hinged to the door frame). Obviously, the door closers currently on the market are limited in their applicable objects and installation locations, which seriously compresses the scope of application of the door closer. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a hidden door closer that can be applied to ordinary door bodies or floor-to-ceiling door bodies, effectively expanding the scope of application of the door closer.

[0004] A concealed door closer according to an embodiment of the utility model comprises a door closer body and a support seat, the door closer body is provided with a first rotating shaft that can be reset; the support seat is connected to the door closer body, the support seat is provided with a second rotating shaft, the end of the first rotating shaft extends into the support seat and is connected to the second rotating shaft; wherein a supporting surface is provided in the support seat, the second rotating shaft is provided with a positioning platform, a planar thrust bearing is provided between the positioning platform and the supporting surface, a tight ring of the planar thrust bearing is abutted against the supporting surface, a loose ring of the planar thrust bearing is sleeved on the second rotating shaft and abuts against the positioning platform, and the loose ring is located below the tight ring.

[0005] A hidden door closer according to an embodiment of the utility model has at least the following beneficial effects: the door closer body is connected to the support seat, which is equivalent to increasing the height of the door closer, and the door closer body can be normally installed on the top of the hinged door for use. By setting the support seat and the plane thrust bearing, the user can install the hidden door closer at the bottom of the door body and connect it with the external door shaft seat. At this time, the hidden door closer evenly disperses the stress of the door body to the second rotating shaft through the plane thrust bearing, and then disperses the stress of the door body to the external door shaft seat through the second rotating shaft. Since the door closer body itself does not bear the door body stress, it can be ensured that the door closer body is not damaged. When the user rotates the door body, the door closer body rotates with the door body, and the first rotating shaft is fixed by the second rotating shaft and the external door shaft seat. At this time, the first rotating shaft rotates relative to the transmission mechanism inside the door closer, ensuring that the door closer body normally performs the reset function. The support seat and the plane thrust bearing work together so that the hidden door closer can be installed normally on the top of the hinged door or on the bottom of the door body. It replaces the top-bottom axis structure to rotate the door panel without affecting the hidden door closer's control of resetting the door body, effectively expanding the scope of application of the door closer.

[0006] According to some embodiments of the utility model, a positioning wheel is provided in the door closer body, the first rotating shaft is provided with a cam portion, the cam portion is provided with two positioning grooves, the two positioning grooves are symmetrically arranged on both sides of the center line of the cam portion, and the positioning grooves and the positioning wheel cooperate to position the door closer body.

[0007] According to some embodiments of the utility model, an insertion portion is provided at one end of the first rotating shaft facing the support seat, the outer wall of the insertion portion is provided with at least one plane, and a socket is provided at the top end of the second rotating shaft, and the insertion portion and the socket are plug-fitted.

[0008] According to some embodiments of the present utility model, the second rotating shaft is connected with a screw, and the screw is passed through the insertion hole and connected to the first rotating shaft.

[0009] According to some embodiments of the utility model, the support seat is provided with a shaft sleeve, and one end of the second rotating shaft facing the door closer body is gap-fitted with a center hole of the shaft sleeve.

[0010] According to some embodiments of the utility model, a limiting portion is provided at the top end of the sleeve, the limiting portion is arranged around the first rotating shaft and extends inwardly along the radial direction of the sleeve, and the limiting portion abuts against the second rotating shaft.

[0011] According to some embodiments of the utility model, the door closer body is provided with a rotatable speed regulating valve, the support seat is provided with a rotatable adjusting column, the top end of the adjusting column is fixedly connected to the speed regulating valve, and the bottom end of the adjusting column passes through the bottom end surface of the support seat.

[0012] According to some embodiments of the utility model, the support seat is provided with a accommodating hole, the adjusting column is accommodated in the accommodating hole, the top end of the adjusting column is provided with a pressing portion, the pressing portion is arranged around the adjusting column, a spring is provided in the accommodating hole, the spring is sleeved on the adjusting column, and both ends of the spring are respectively in contact with the pressing portion and the inner end surface of the support seat.

[0013] According to some embodiments of the utility model, connecting holes are respectively provided at both ends of the door closer body in the horizontal direction, the support seat is provided with through holes corresponding to the connecting holes one by one, and the support seat is bolted to the door closer body through the connecting holes, the through holes and screws.

[0014] According to some embodiments of the present invention, along the width direction of the door closer body, two sides of the door closer body are flush with two side end surfaces of the support seat.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:

[0017] Figure 1 This is a structural schematic diagram of a concealed door closer according to an embodiment of the utility model;

[0018] Figure 2 This is an exploded schematic diagram of a concealed door closer according to an embodiment of the utility model;

[0019] Figure 3 This is a schematic diagram of the installation of the second rotating shaft of an embodiment of the utility model;

[0020] Figure 4 It is a schematic diagram of the installation of an adjusting column according to an embodiment of the utility model.

[0021] Figure numerals: door closer body 100; first rotating shaft 110; insertion portion 111; support seat 200; accommodating hole 201; through hole 202; second rotating shaft 210; insertion hole 2101; positioning platform 211; screw 212; support surface 220; plane thrust bearing 230; tightening ring 231; loose ring 232; sleeve 240; limiting portion 241; adjusting column 250; spring 260; support portion 270. DETAILED DESCRIPTION

[0022] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0023] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0024] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0025] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0026] Reference Figure 1 and Figure 2 As shown, a concealed door closer of an embodiment of the utility model comprises a door closer body 100 and a support seat 200, and the door closer body 100 is provided with a first rotating shaft 110 which can be reset; specifically, when the user pushes the door panel, the door panel drives the first rotating shaft 110 to rotate, and the first rotating shaft 110 can cooperate with the transmission components in the door closer, such as gear racks, cam positioning wheels, etc., so as to drive the spring 260 in the door closer to compress. After the user releases the door panel, under the action of the elastic force of the spring 260 and the hydraulic oil in the oil chamber of the door closer, the first rotating shaft 110 resets and drives the door panel to reset.

[0027] The support seat 200 is connected to the door closer body 100, and support parts 270 connected to the door body are provided at both ends of the support seat 200. A receiving groove is provided in the support seat 200, and a second rotating shaft 210 is installed in the receiving groove. The end of the first rotating shaft 110 extends into the support seat 200 and is connected to the second rotating shaft 210; specifically, an insertion part 111 is provided at one end of the first rotating shaft 110 facing the support seat 200, and the outer wall of the insertion part 111 is provided with at least one plane, that is, the insertion part 111 is a column or a polygonal prism with at least one cross-section, and a socket 2101 is provided at the top of the second rotating shaft 210, and the insertion part 111 and the socket 2101 are plugged into each other.

[0028] By providing the insertion portion 111 with a plane, on the one hand, the connection and cooperation between the first rotating shaft 110 and the second rotating shaft 210 can be facilitated, thereby improving the assembly efficiency of the hidden door closer; on the other hand, the synchronization rate of the rotation of the first rotating shaft 110 and the second rotating shaft 210 can be improved, thereby ensuring the normal operation of the hidden door closer.

[0029] Reference Figure 3 As shown, it can be understood that the second rotating shaft 210 is connected with a screw 212 , and the screw 212 is inserted into the insertion hole 2101 with the screw facing upward and connected to the first rotating shaft 110 .

[0030] By providing screws 212 to bolt the first rotating shaft 110 and the second rotating shaft 210 , the connection stability of the first rotating shaft 110 and the second rotating shaft 210 can be effectively improved, radial movement of the first rotating shaft 110 can be avoided, and the synchronization rate of the rotation of the first rotating shaft 110 and the second rotating shaft 210 can be further improved.

[0031] Reference Figure 2 and Figure 3 As shown, it can be understood that the support seat 200 is provided with a shaft sleeve 240 , and one end of the second rotating shaft 210 facing the door closer body 100 is gap-matched with the center hole of the shaft sleeve 240 .

[0032] By providing the shaft sleeve 240 , the shaft sleeve 240 can reduce the friction and wear of the second rotating shaft 210 , guide the second rotating shaft 210 to rotate stably, avoid radial runout of the second rotating shaft 210 , effectively improve the rotation stability of the second rotating shaft 210 , and extend the service life of the second rotating shaft 210 .

[0033] Furthermore, a limiting portion 241 is provided at the top end of the shaft sleeve 240 . The limiting portion 241 is arranged around the insertion portion 111 and extends inwardly along the radial direction of the shaft sleeve 240 . The limiting portion 241 abuts against the second rotating shaft 210 .

[0034] By providing the limiting portion 241 , the limiting portion 241 can limit the sleeve 240 from moving downward along the axial direction of the second rotating shaft 210 , thereby affecting the fit between the sleeve 240 and the second rotating shaft 210 and effectively improving the installation stability of the sleeve 240 .

[0035] Reference Figure 2 and Figure 4 As shown, it can be understood that the door closer body 100 is provided with at least one rotatable speed regulating valve, which controls the speed of resetting the door closer by adjusting the oil flux in the door closer body 100, and the support seat 200 is provided with a rotatable adjusting column 250, the top end of the adjusting column 250 is fixedly connected to the speed regulating valve, that is, the top end of the adjusting column 250 is snap-fitted with the hexagonal screw hole at the end of the speed regulating valve, and the bottom end of the adjusting column 250 passes through the bottom end surface of the support seat 200.

[0036] The door closer body 100 is usually provided with a speed regulating valve with a hexagonal screw hole. When the door closer body 100 is connected to the support seat 200, the door closer body 100 will cover the speed regulating valve. By providing an adjusting column 250, the adjusting column 250 is rotatably mounted on the support seat 200 and fixedly connected to the speed regulating valve, and the bottom end of the adjusting column 250 passes through the bottom end surface of the support seat 200, at this time, the adjusting column 250 can be regarded as an extension of the speed regulating valve, ensuring that the reset speed of the door closer body 100 can still be adjusted normally after the door closer body 100 is connected to the support seat 200, effectively improving the structural rationality of the hidden door closer.

[0037] Reference Figure 4 As shown, it can be understood that the support seat 200 is provided with a receiving hole 201, the adjusting column 250 is received in the receiving hole 201, the top of the adjusting column 250 is provided with a pressing portion, the pressing portion is arranged around the adjusting column 250, a spring 260 is provided in the receiving hole 201, the spring 260 is sleeved on the adjusting column 250, and the two ends of the spring 260 are respectively abutted against the pressing portion and the inner end surface of the support seat 200.

[0038] By providing the spring 260 , the spring 260 can press the adjusting column 250 tightly to prevent the adjusting column 250 from loosening or even detaching from the speed regulating valve, thereby effectively improving the connection stability between the adjusting column 250 and the speed regulating valve.

[0039] The support seat 200 is provided with a support surface 220, which is the inner end surface of the accommodating groove. The second rotating shaft 210 is provided with a positioning platform 211. A plane thrust bearing 230 is provided between the positioning platform 211 and the support surface 220. The plane thrust bearing 230 mainly consists of a tight ring 231, a loose ring 232 and a ball. The ball is located between the tight ring 231 and the loose ring 232. The tight ring 231 of the plane thrust bearing 230 is close to the support surface 220, and the loose ring 232 of the plane thrust bearing 230 is sleeved on the second rotating shaft 210 and abuts against the positioning platform 211. The loose ring 232 is located below the tight ring 231.

[0040] It can be understood that the door closer body 100 is connected to the support base 200. When the hidden door closer is conventionally installed at the top of the hinged door (at this time, the hidden door closer is inverted, that is, the support base 200 is located above the door closer body 100), the support base 200 is equivalent to increasing the height of the door closer. The part of the second rotating shaft 210 that passes through the support base 200 is equivalent to an extension of the first rotating shaft 110. The second rotating shaft 210 can be connected to the connecting rod structure to ensure that the door closer body 100 is installed and used normally.

[0041] By providing the support seat 200 and the plane thrust bearing 230, the user can install the hidden door closer at the bottom of the door body and connect it to the external door shaft seat. At this time, the stress of the door body acts on the support part 270, and the hidden door closer evenly disperses the stress of the door body to the second rotating shaft 210 through the plane thrust bearing 230, and then disperses the stress of the door body to the external door shaft seat through the second rotating shaft 210. Since the door closer body 100 itself does not bear the stress of the door body, it can be ensured that the door closer body 100 is not damaged.

[0042] When the user rotates the door body, the door closer body 100 rotates with the door body, and the first rotating shaft 110 is fixed by the second rotating shaft 210 and the external door shaft seat. At this time, the second rotating shaft 210 rotates relative to the support seat 200. Therefore, the tight ring 231 of the plane thrust bearing 230 needs to be abutted against the support surface 220, and the loose ring 232 of the plane thrust bearing 230 is sleeved on the second rotating shaft 210 and abuts against the positioning platform 211 to ensure the normal operation of the plane thrust bearing 230 and improve the rationality of the hidden door closer structure. At the same time, the first rotating shaft 110 rotates relative to the transmission mechanism inside the door closer to ensure that the door closer body 100 performs the reset function normally.

[0043] The support seat 200 and the plane thrust bearing 230 cooperate so that the hidden door closer can be installed normally on the top of the hinged door or on the bottom of the door body. It replaces the top-bottom axis structure to rotate the door panel without affecting the hidden door closer's control of resetting the door body, effectively expanding the scope of application of the door closer.

[0044] Reference Figure 2 As shown, it can be understood that, along the horizontal direction, connecting holes are respectively provided at both ends of the door closer body 100, and the support seat 200 is provided with through holes 202 corresponding to the connecting holes one by one, and the support seat 200 is bolted to the door closer body 100 through the connecting holes, the through holes 202 and screws.

[0045] Conventional door closers are usually provided with a connecting plate to connect the door body, and the connecting plate is bolted to the connecting plate through the connecting holes on the door closer. Therefore, the door closer is pre-set with connecting holes when it leaves the factory. By providing through holes 202 corresponding to the connecting holes on the support base 200, the originally reserved mounting holes of the door closer body 100 are reasonably utilized, and the installation and use of the support base 200 is convenient, and there is no need to re-open a new hole and groove structure on the door closer body 100. In other words, the support base 200 can be directly used in the existing door closer, which greatly reduces the production and manufacturing cost of the hidden door closer and facilitates the promotion and use of the hidden door closer.

[0046] Reference Figure 1 and Figure 2 As shown, it can be understood that along the width direction of the door closer body 100 , both sides of the door closer body 100 are flush with both side end surfaces of the support base 200 .

[0047] Since the support base 200 needs to be provided with a support portion 270 to connect the door body, in the horizontal direction, both ends of the support base 200 will protrude from the door closer body 100. In the width direction of the door closer body 100, the door closer body 100 and the support base 200 are arranged flush with each other. On the one hand, it is convenient to pack and transport the hidden door closer, and at the same time, Fang Bo Ni users can open a mounting groove of the same width on the door body to install the hidden door closer, saving the assembly cost of the hidden door closer; on the other hand, it can make the appearance of the hidden door closer neat and consistent, without redundant step structures, effectively improving the appearance of the hidden door closer.

[0048] In fact, when the door closer body 100 retains the connecting plate, the support portion 270 is flush with the end surface of the connecting plate. At this time, the connecting plate can be approximately regarded as a part of the door closer body 100. That is to say, when the door closer body 100 retains the connecting plate, the outer peripheral wall of the support seat 200 is flush with the end surface of the outer peripheral wall of the door closer body 100.

[0049] It can be understood that a positioning wheel is provided in the door closer body 100, and the first rotating shaft 110 is provided with a cam portion (that is, the door closer body 100 adopts a transmission structure such as a cam positioning wheel to drive the return spring to compress), and the cam portion is provided with two positioning grooves, and the two positioning grooves are symmetrically arranged on both sides of the center line of the cam portion. The positioning groove and the positioning wheel cooperate to position the door closer body 100. When the first rotating shaft 110 rotates 90°, the positioning wheel is just stuck in the positioning groove, thereby fixing the door panel through the first rotating shaft 110.

[0050] By setting the positioning groove, when the user uses a hidden door closer to replace the top and bottom axis to control the rotation of the door body, the door body can be positioned even if the traditional connecting rod slider mechanism is omitted, thereby increasing the functionality of the hidden door closer and effectively improving the user experience.

[0051] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A concealed door closer, characterized in that: include: The door closer body is provided with a first rotating shaft capable of being reset; A support seat connected to the door closer body, the support seat being provided with a second rotating shaft, an end of the first rotating shaft extending into the support seat and connected to the second rotating shaft; Among them, a supporting surface is provided in the supporting seat, a positioning platform is provided in the second rotating shaft, a planar thrust bearing is provided between the positioning platform and the supporting surface, a tight ring of the planar thrust bearing is abutted against the supporting surface, a loose ring of the planar thrust bearing is sleeved on the second rotating shaft and abutted against the positioning platform, and the loose ring is located below the tight ring.

2. A concealed door closer according to claim 1, characterized in that: A positioning wheel is provided inside the door closer body, the first rotating shaft is provided with a cam portion, the cam portion is provided with two positioning grooves, the two positioning grooves are symmetrically arranged on both sides of the center line of the cam portion, and the positioning grooves and the positioning wheel cooperate to position the door closer body.

3. A concealed door closer according to claim 1 or 2, characterized in that: An insertion portion is provided at one end of the first rotating shaft facing the support seat, and an outer side wall of the insertion portion is provided with at least one plane. A plug hole is provided at the top end of the second rotating shaft, and the insertion portion and the plug hole are plug-fitted.

4. A concealed door closer according to claim 3, characterized in that: The second rotating shaft is connected with a screw, and the screw is passed through the insertion hole and connected with the first rotating shaft.

5. A concealed door closer according to claim 1 or 2, characterized in that: The support seat is provided with a shaft sleeve, and one end of the second rotating shaft facing the door closer body is gap-matched with the center hole of the shaft sleeve.

6. A concealed door closer according to claim 5, characterized in that: A limiting portion is provided at the top end of the shaft sleeve. The limiting portion is arranged around the first rotating shaft and extends inwardly along the radial direction of the shaft sleeve. The limiting portion abuts against the second rotating shaft.

7. A concealed door closer according to claim 1, characterized in that: The door closer body is provided with a rotatable speed regulating valve, the support seat is provided with a rotatable adjusting column, the top end of the adjusting column is fixedly connected to the speed regulating valve, and the bottom end of the adjusting column passes through the bottom end surface of the support seat.

8. A concealed door closer according to claim 7, characterized in that: The support seat is provided with a receiving hole, the adjusting column is received in the receiving hole, a pressing portion is provided at the top of the adjusting column, the pressing portion is arranged around the adjusting column, a spring is provided in the receiving hole, the spring is sleeved on the adjusting column, and two ends of the spring are respectively in contact with the pressing portion and the inner end surface of the support seat.

9. The concealed door closer according to claim 1, characterized in that: Along the horizontal direction, both ends of the door closer body are respectively provided with connecting holes, the support seat is provided with through holes corresponding to the connecting holes one by one, and the support seat is bolted to the door closer body through the connecting holes, the through holes and screws.

10. A concealed door closer according to claim 1 or 9, characterized in that: Along the width direction of the door closer body, two sides of the door closer body are flush with two side end surfaces of the support seat.

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