Door closer convenient to maintain

Abstract

The door closer convenient to maintain comprises a base body, a piston piece, a transmission mechanism and a first filter, an oil cavity and a first oil way channel are arranged in the base body, the piston piece is arranged in the oil cavity in a sliding mode and can divide the oil cavity into a first cavity body and a second cavity body, one end of the first oil way channel is connected with the first cavity body, and the other end of the first oil way channel is connected with the second cavity body. The transmission mechanism is in transmission connection with the piston piece, the first filter is arranged on the base body, a mounting groove is formed in the outer side wall of the base body, the mounting groove is communicated with the first oil way channel, the first filter is mounted in the mounting groove, the first filter is provided with a filtering cavity, and the filtering cavity is communicated with the first oil way channel. A mounting groove is formed in the outer side wall of the base body, and the first filter can be directly mounted in the mounting groove, so that the first filter can be detached for maintenance, filtered iron powder impurities can be cleaned, and maintenance is convenient.

Description

Technical Field

[0001] This utility model relates to the technical field of door closers, and in particular to a door closer that is easy to maintain. Background Technology

[0002] Door closers generally use a hydraulic structure with hydraulic buffer reset. However, the mechanical transmission structure inside the door closer will wear during rotation. Wear debris can enter the oil circuit, which may cause blockage and malfunction. In the existing technology, some door closers have filters installed in the oil circuit to filter the oil circuit. However, the filters are generally difficult to remove and maintain, and are prone to failure after long-term use. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a door closer that is easy to maintain, solving the problem of cumbersome maintenance of filter components.

[0004] A maintenance-friendly door closer according to a first aspect embodiment of the present invention includes: a base, a piston, a transmission mechanism, and a first filter. The base has an oil cavity and a first oil passage. The piston is slidably disposed in the oil cavity and can divide the oil cavity into a first cavity and a second cavity. One end of the first oil passage is connected to the first cavity, and the other end is connected to the second cavity. The transmission mechanism is disposed in the base and is drively connected to the piston. The first filter is disposed in the base. The outer wall of the base has a mounting groove that communicates with the first oil passage. The first filter is installed in the mounting groove and has a filter cavity that communicates with the first oil passage.

[0005] The easy-to-maintain door closer according to the embodiments of this utility model has at least the following beneficial effects: During the use of the door closer, the transmission mechanism drives the piston to slide. The oil chamber contains hydraulic oil. When the piston slides in the oil chamber, it can form a buffering and resetting effect in conjunction with the first oil passage. The outer wall of the seat has a mounting groove, and the first filter can be directly installed in the mounting groove without disassembling the seat, which is convenient for disassembly and assembly. When the first filter is installed in the mounting groove, the first oil passage can communicate with the filter chamber to achieve oil filtration. The iron powder and other impurities generated by the transmission mechanism during operation can be filtered clean in the filter chamber of the first filter in the first oil passage to keep the oil passage unobstructed. The first filter can be disassembled for maintenance and can clean the filtered iron powder impurities, which is convenient for maintenance.

[0006] According to some embodiments of the present invention, the first filter includes a blocking member that can cooperate with the mounting groove to block the opening of the mounting groove.

[0007] According to some embodiments of the present invention, the blocking component is provided with a first groove with an opening facing the seat body. The opening of the first groove is connected to the first cavity through the first oil passage. The blocking component is also provided with a filter body. The filter body blocks the opening of the first groove. The filter body and the first groove define the filter cavity. The side wall of the blocking component is provided with a first through hole. The first through hole is connected to the second cavity through the first oil passage.

[0008] According to some embodiments of the present invention, the plugging component is threadedly connected to the mounting groove.

[0009] According to some embodiments of this utility model, the filter body is configured as a filter screen.

[0010] According to some embodiments of this utility model, it also includes a needle valve. The seat is provided with a valve groove, the needle valve is installed in the valve groove, the needle valve cooperates with the valve groove to define a valve cavity, the valve cavity is connected to the first oil passage, and the needle valve can adjust the size of the valve cavity.

[0011] According to some embodiments of the present invention, a second filter is also included. The seat body also has a second oil passage. The second filter is capable of filtering the second oil passage. The first oil passage has a first opening and a second opening. The first opening communicates with the first cavity, and the second opening communicates with the second cavity. The second oil passage has a third opening and a fourth opening. The third opening is offset to the left from the first opening, and the fourth opening is offset to the left from the second opening.

[0012] According to some embodiments of the present invention, the transmission mechanism includes a rotating member and a transmission assembly. The rotating member is rotatably disposed on the base, and the transmission assembly is connected to the rotating member and the piston member in a transmission manner. Rotating the rotating member can drive the transmission assembly to push the piston member to slide.

[0013] According to some embodiments of the present invention, the transmission assembly includes a cam and a sliding assembly. The cam is disposed on the rotating member, and the rotating member can drive the cam to rotate. The sliding assembly is connected to the cam in a transmission manner, and the cam can drive the sliding assembly to slide in the left-right direction.

[0014] According to some embodiments of the present invention, the sliding assembly includes an upper support plate, a lower support plate, a first roller, a second roller, and a connecting member. The first roller and the second roller are rotatably disposed between the upper support plate and the lower support plate. The connecting member is disposed on the upper support plate and / or the lower support plate and is connected to the piston member. The first roller and the second roller are arranged opposite to each other in the left-right direction. The cam can cooperate with the first roller or the second roller to drive the connecting member to move left and right.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The above or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0017] Figure 1 This is a general schematic diagram of some embodiments of the present utility model;

[0018] Figure 2 This is a general schematic diagram of some embodiments of the present utility model;

[0019] Figure 3 This is an exploded view of the first and second filters;

[0020] Figure 4 for Figure 2 The front view;

[0021] Figure 5 for Figure 4 Sectional view at point AA;

[0022] Figure 6 for Figure 4 Sectional view at point BB;

[0023] Figure 7 This is a cross-sectional view of some sliding positions of the piston component of this utility model;

[0024] Figure 8 This is a cross-sectional view of some sliding positions of the piston component of this utility model;

[0025] Figure 9 This is an exploded view of the transmission mechanism.

[0026] Figure label:

[0027] Seat 100, first cavity 111, second cavity 112, first oil passage 120, first opening 121, second opening 122, mounting groove 130, valve groove 140, valve cavity 141, second oil passage 150, third opening 151, fourth opening 152;

[0028] Piston part 200;

[0029] Transmission mechanism 300, rotating part 310, transmission assembly 320, cam 321, sliding assembly 322, upper support plate 3221, lower support plate 3222, first roller 3223, second roller 3224, connecting part 3225;

[0030] First filter 400, filter chamber 410, plug 420, first tank 421, filter body 422, first through hole 423;

[0031] Needle valve 500;

[0032] Second filter 600. Detailed Implementation

[0033] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0034] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0035] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0036] Reference Figures 1 to 6 According to a first aspect of the present invention, a door closer that is easy to maintain includes a base 100, a piston 200, a transmission mechanism 300, and a first filter 400. The base 100 has an oil cavity and a first oil passage 120. The piston 200 is slidably disposed in the oil cavity and can divide the oil cavity into a first cavity 111 and a second cavity 112. One end of the first oil passage 120 is connected to the first cavity 111, and the other end is connected to the second cavity 112. The transmission mechanism 300 is drivenly connected to the piston 200. The first filter 400 is disposed in the base 100. The outer wall of the base 100 is provided with a mounting groove 130, which communicates with the first oil passage 120. The first filter 400 is installed in the mounting groove 130 and has a filter cavity 410, which communicates with the first oil passage 120. During the use of the door closer, the transmission mechanism 300 drives the piston 200 to slide. The oil chamber contains hydraulic oil. When the piston 200 slides in the oil chamber, it can form a buffer and reset function in conjunction with the first oil passage 120. The outer wall of the seat 100 has a mounting groove 130. The first filter 400 can be directly installed in the mounting groove 130 without disassembling the seat 100, which is convenient for disassembly and assembly. When the first filter 400 is installed in the mounting groove 130, the first oil passage 120 can be connected to the filter chamber 410 to achieve oil filtration. The iron powder and other impurities generated by the transmission mechanism 300 during operation can be filtered clean in the filter chamber 410 of the first filter 400 in the first oil passage to keep the oil passage unobstructed. The first filter 400 can be disassembled for maintenance and the filtered iron powder impurities can be cleaned, which is convenient for maintenance.

[0037] Specifically, the door closer can be installed on the door frame or the door body. When installed on the door frame, the door body can be connected to the transmission mechanism 300. The transmission mechanism 300 can be located in the oil chamber within the base 100. When the door body rotates, the transmission mechanism 300 can drive the piston 200 to move within the oil chamber. When the piston 200 moves, the first chamber 111 and the second chamber 112, which are separated, are connected through the first oil passage 120. The first oil passage 120 can be made by drilling holes in the base 100, and some of the pipes can be located close to the side wall to facilitate installation. The mounting groove 130 can be connected to the first oil passage 120. The shape of the first filter 400 matches that of the mounting groove 130. The first filter 400 can be directly installed in the mounting groove 130. The first filter 400 has a filter chamber 410. It can be understood that the filter chamber 410 can filter the fluid passing through. The oil in the first oil passage 120 can be filtered through the filter chamber 410. Moreover, the first filter 400 is easy to disassemble. After disassembly, impurities such as iron powder in the filter chamber 410 can be cleaned, which is convenient for maintenance and therefore not easy to clog.

[0038] Reference Figure 3 and Figure 6 In some embodiments of this utility model, the first filter 400 includes a plugging member 420, which can cooperate with the mounting groove 130 to block the opening of the mounting groove 130. Specifically, the mounting groove 130 can be directly connected to the first oil passage 120, and the first filter 400 can act as the plugging member 420 to block the opening of the mounting groove 130, while also filtering the oil.

[0039] Reference Figures 3 to 6 In some embodiments of this utility model, the blocking member 420 is provided with a first groove 421 with an opening facing the seat 100. The opening of the first groove 421 is connected to the first cavity 111 through the first oil passage 120. The blocking member 420 is also provided with a filter body 422, which blocks the opening of the first groove 421. The filter body 422 and the first groove 421 define a filter cavity 410. The side wall of the blocking member 420 is provided with a first through hole 423, which is connected to the second cavity 112 through the first oil passage 120. Specifically, the first tank 421 has a first through hole 423 on its side wall, which allows oil to flow through. The opening of the first tank 421 can be sealed with a filter body 422. The opening of the first tank 421 is opposite to the first cavity 111, so that the filter cavity 410 can be directly connected to the second cavity 112 through the first through hole 423. The transmission mechanism 300 can be located in the second cavity 112. The oil in the second cavity 112 can lubricate the transmission mechanism 300. In use, the filter body 422 can prevent iron powder in the second cavity 112 from flowing to the first cavity 111 and can trap iron powder impurities in the second cavity 112 in the filter cavity 410, thus preventing impurities from clogging the oil passage.

[0040] In some embodiments of this utility model, the plug 420 is threadedly connected to the mounting groove 130. Specifically, the side wall of the plug 420 may be provided with external threads, and the inner side wall of the mounting groove 130 may be provided with internal threads, so that the plug 420 can be threadedly connected to the seat 100, which is convenient for installation and has good sealing performance.

[0041] In some embodiments of this invention, the filter body 422 is configured as a filter screen. Specifically, the filter screen can filter impurities and is also easy to clean.

[0042] Reference Figures 2 to 5 In some embodiments of this utility model, a needle valve 500 is also included. The seat 100 is provided with a valve groove 140, and the needle valve 500 is installed in the valve groove 140. The needle valve 500 and the valve groove 140 cooperate to define a valve cavity 141, which is connected to the first oil passage 120. The needle valve 500 can adjust the size of the valve cavity 141. Specifically, the needle valve 500 can be threaded to the valve groove 140. Rotating the needle valve 500 can move it closer to or away from the valve cavity 141, thereby changing the size of the valve cavity 141, and thus controlling the flow rate of oil through the first oil passage 120, thereby controlling the damping intensity.

[0043] Reference Figure 3 , Figures 7 to 8 In some embodiments of this utility model, a second filter 600 is also included. The seat 100 also has a second oil passage 150. The second filter 600 can filter the second oil passage 150. The first oil passage 120 has a first opening 121 and a second opening 122. The first opening 121 is connected to the first cavity 111, and the second opening 122 is connected to the second cavity 112. The second oil passage 150 has a third opening 151 and a fourth opening 152. The third opening 151 is offset to the left from the first opening 121, and the fourth opening 152 is offset to the left from the second opening 122. Specifically, the first cavity 111 is located near the left side. The second oil passage 150 can have a structure that is roughly the same as the first oil passage 120. The second filter 600 can have a structure that is roughly the same as the first filter 400. The second oil passage 150 can move to the left so that it can be offset from the first oil passage 120. Thus, the first opening 121 and the third opening 151 can be offset, and the second opening 122 and the fourth opening 152 can be offset. After the piston 200 slides to the left to block the first opening 121, the oil does not flow back from the first oil passage 120, while the third opening 151 can still be connected. At this time, the distance between the fourth opening 152 and the edge of the piston 200 is reduced, which can force open the piston 200 under pressure and make the oil flow from the second oil passage 150 to the second cavity 112, and further increase the damping to form two different damping sections.

[0044] Reference Figures 7 to 9 In some embodiments of this utility model, the transmission mechanism 300 includes a rotating member 310 and a transmission assembly 320. The rotating member 310 is rotatably disposed on the base 100, and the transmission assembly 320 is drively connected to the rotating member 310 and the piston member 200. Rotating the rotating member 310 can drive the transmission assembly 320 to push the piston member 200 to slide. Specifically, the rotating member 310 can be connected to a door hinge, and the transmission assembly 320 is drively connected to the rotating member 310, which can transmit the rotation to the piston member 200 for translation, thereby causing the rotating member 310 to generate damping and return elastic force.

[0045] Reference Figure 9 In some embodiments of this utility model, the transmission assembly 320 includes a cam 321 and a sliding assembly 322. The cam 321 is disposed on the rotating member 310, and the rotating member 310 can drive the cam 321 to rotate. The sliding assembly 322 is connected to the cam 321 in a transmission manner, and the cam 321 can drive the sliding assembly 322 to slide in the left and right direction. Specifically, when the rotating member 310 rotates, the cam 321 can abut against the sliding assembly 322, thereby enabling it to reciprocate in the left and right direction, thereby driving the piston member 200 to move.

[0046] Reference Figure 9 In some embodiments of this utility model, the sliding component 322 includes an upper support plate 3221, a lower support plate 3222, a first roller 3223, a second roller 3224, and a connecting member 3225. The first roller 3223 and the second roller 3224 are rotatably disposed between the upper support plate 3221 and the lower support plate 3222. The connecting member 3225 is disposed on the upper support plate 3221 and / or the lower support plate 3222, and the connecting member 3225 is connected to the piston component 200. The first roller 3223 and the second roller 3224 are arranged opposite to each other in the left-right direction. The cam 321 can cooperate with the first roller 3223 or the second roller 3224 to drive the connecting member 3225 to move left and right. Specifically, the first roller 3223 and the second roller 3224 can connect the upper support plate 3221 and the lower support plate 3222, and the two can be arranged in parallel and spaced apart. A connecting member 3225 can be provided on the side of the upper support plate 3221 and the lower support plate 3222 near the piston member 200. The connecting member 3225 can be installed between the upper support plate 3221 and the lower support plate 3222 and is connected to the piston member 200. When the cam 321 rotates, it will abut against the first roller 3223 and the second roller 3224, thereby driving the upper support plate 3221, the lower support plate 3222 and the connecting member 3225 to reciprocate in the left and right direction. Through the cooperation of the first roller 3223 and the second roller 3224 with the cam 321, wear can be reduced and service life can be improved.

[0047] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0048] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A door closer that is easy to maintain, characterized in that, include: The seat (100) has an oil cavity and a first oil passage (120) inside; The piston (200) is slidably disposed in the oil chamber and can divide the oil chamber into a first chamber (111) and a second chamber (112). One end of the first oil passage (120) is connected to the first chamber (111) and the other end is connected to the second chamber (112). A transmission mechanism (300) is provided on the seat (100) and is connected to the piston (200) in a transmission manner; A first filter (400) is disposed on the base (100). The outer wall of the base (100) is provided with a mounting groove (130). The mounting groove (130) is connected to the first oil passage (120). The first filter (400) is installed in the mounting groove (130). The first filter (400) is provided with a filter chamber (410). The filter chamber (410) is connected to the first oil passage (120).

2. The easy-to-maintain door closer according to claim 1, characterized in that, The first filter (400) includes a plug (420) that can engage with the mounting slot (130) to block the opening of the mounting slot (130).

3. The easy-to-maintain door closer according to claim 2, characterized in that, The plugging component (420) is provided with a first groove (421) with an opening facing the seat (100). The opening of the first groove (421) is connected to the first cavity (111) through the first oil passage (120). The plugging component (420) is also provided with a filter (422). The filter (422) blocks the opening of the first groove (421). The filter (422) and the first groove (421) define the filter cavity (410). The side wall of the plugging component (420) is provided with a first through hole (423). The first through hole (423) is connected to the second cavity (112) through the first oil passage (120).

4. The easy-to-maintain door closer according to claim 2, characterized in that, The plug (420) is threadedly connected to the mounting groove (130).

5. The easy-to-maintain door closer according to claim 3, characterized in that, The filter body (422) is configured as a filter screen.

6. The easy-to-maintain door closer according to claim 1, characterized in that, It also includes a needle valve (500), the seat (100) is provided with a valve groove (140), the needle valve (500) is installed in the valve groove (140), the needle valve (500) cooperates with the valve groove (140) to define a valve cavity (141), the valve cavity (141) is connected to the first oil passage (120), and the needle valve (500) can adjust the size of the valve cavity (141).

7. The easy-to-maintain door closer according to claim 1, characterized in that, It also includes a second filter (600), and the seat (100) further has a second oil passage (150). The second filter (600) is capable of filtering the second oil passage (150). The first oil passage (120) has a first opening (121) and a second opening (122). The first opening (121) communicates with the first cavity (111), and the second opening (122) communicates with the second cavity (112). The second oil passage (150) has a third opening (151) and a fourth opening (152). The third opening (151) is offset to the left from the first opening (121), and the fourth opening (152) is offset to the left from the second opening (122).

8. The easy-to-maintain door closer according to claim 1, characterized in that, The transmission mechanism (300) includes a rotating member (310) and a transmission assembly (320). The rotating member (310) is rotatably disposed on the seat (100). The transmission assembly (320) is connected to the rotating member (310) and the piston member (200) in a transmission manner. Rotating the rotating member (310) can drive the transmission assembly (320) to push the piston member (200) to slide.

9. The easy-to-maintain door closer according to claim 8, characterized in that, The transmission assembly (320) includes a cam (321) and a sliding assembly (322). The cam (321) is disposed on the rotating member (310), and the rotating member (310) can drive the cam (321) to rotate. The sliding assembly (322) is connected to the cam (321) in a transmission manner, and the cam (321) can drive the sliding assembly (322) to slide in the left and right direction.

10. The easy-to-maintain door closer according to claim 9, characterized in that, The sliding assembly (322) includes an upper support plate (3221), a lower support plate (3222), a first roller (3223), a second roller (3224), and a connecting member (3225). The first roller (3223) and the second roller (3224) are rotatably disposed between the upper support plate (3221) and the lower support plate (3222). The connecting member (3225) is disposed on the upper support plate (3221) and / or the lower support plate (3222), and the connecting member (3225) is connected to the piston (200). The first roller (3223) and the second roller (3224) are arranged opposite to each other in the left-right direction. The cam (321) can cooperate with the first roller (3223) or the second roller (3224) to drive the connecting member (3225) to move left and right.

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