Eccentric cam action door closer for glass door

Abstract

To provide an eccentric cam action door closer for a glass door, which can maintain an opened / closed state thereof.SOLUTION: Opening a door clockwise to a prescribed position causes a first roller 410 to fit into a first opening arc groove, resulting in being relatively fixed to an eccentric cam 210. Opening the door counterclockwise to a prescribed position causes a second roller 420 to fit into a second opening arc groove, resulting in being relatively fixed to the eccentric cam 210. Closing the door to a prescribed position causes the first roller 410 to fit into a first closing arc groove and the second roller 420 fits into a second closing arc groove, resulting in being relatively fixed to the eccentric cam 210. This prevents a camshaft from rotating further within a housing 100, positions the door at a prescribed position with respect to an opening / closing angle, and finally stops the door at a prescribed position.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to the technical field of door closers, and particularly to an eccentric cam door closer for glass doors.

Background Art

[0002] A door closer is a hydraulic device such as a spring provided at the upper part of a door. After the door is opened, it is compressed and released to automatically close the door, having an effect similar to that of a spring door, and ensuring that the door can be accurately and timely closed to the initial position after being opened.

[0003] During the process of the spring being released, the hydraulic oil in the left chamber of the door closer is compressed and the check valve is closed. The hydraulic oil flows out through the gap between the door closer housing and the plunger, and returns to the right chamber through two flow paths provided with small holes in the plunger and the throttle valve core. Therefore, the hydraulic oil becomes the resistance for the spring to be released, and the cushioning effect by throttling is obtained, and the closing speed of the door is controlled. The throttle valve of the valve body is adjustable, and the closing speed of the door can be variably controlled in different stroke intervals.

[0004] Currently, commercially available door closers can close the door after it is opened, but they cannot maintain the open / closed state, which affects the use.

Summary of the Invention

Problems to be Solved by the Invention

[0005] The object of the present invention is to provide an eccentric cam door closer for glass doors, and to solve the technical problem of conventional door closers that cannot maintain the open / closed state.

Means for Solving the Problems

[0006] To achieve the above object, an eccentric cam door closer for a glass door according to an embodiment of the present invention includes a housing, a camshaft, a valve assembly, and a piston compression assembly. In the housing, an inner cavity is formed inside the housing along its axial direction. The camshaft is rotatably supported in the housing, and an eccentric cam that can rotate synchronously is installed on the camshaft. The valve assembly is slidably installed in the inner cavity and is located on the left side of the eccentric cam. The piston compression assembly is slidably provided in the inner cavity and is located on the right side of the eccentric cam. In the piston compression assembly, a first roller and a second roller are installed at an end near the eccentric cam. On the outer peripheral surface of the eccentric cam, a first closing arc-shaped groove and a second closing arc-shaped groove used for closing positioning, and a first opening arc-shaped groove and a second opening arc-shaped groove used for opening positioning are installed. In the closed state, the first roller is fitted into the first closing arc-shaped groove, and the second roller is fitted into the second closing arc-shaped groove. In the fully open state in the clockwise direction, the first roller is fitted into the first opening arc-shaped groove. In the fully open state in the counterclockwise direction, the second roller is fitted into the second opening arc-shaped groove.

[0007] Preferably, the first roller and the second roller always contact the outer peripheral surface of the eccentric cam regardless of the rotational position of the eccentric cam, suppressing the generation of a gap between the first roller and the second roller and the eccentric cam.

[0008] Preferably, a spring member is installed in the piston compression assembly. The spring member presses the first roller and the second roller, and always makes the first roller and the second roller softly contact with the outer peripheral surface of the eccentric cam.

[0009] Preferably, the piston compression assembly further includes a compression piston block slidably provided in the inner cavity. One end of the spring member abuts against and is supported by the housing, and the other end is inserted into the compression piston block and abuts against and is supported by the compression piston block. In the compression piston block, two fixing pins are provided at intervals at an end close to the eccentric cam, and the first roller and the second roller are rotatably attached to the two fixing pins respectively.

[0010] Preferably, the spring member includes an inner spring and an outer spring. The outer spring covers the outside of the inner spring. One ends of the outer spring and the inner spring simultaneously abut against and are supported by the housing, and the other ends of the outer spring and the inner spring are simultaneously inserted into the compression piston block and abut against and are supported by the compression piston block.

[0011] Preferably, the inner cavity is partitioned by the valve assembly, and a first oil passage and a second oil passage located on both sides of the valve assembly are formed. The communication between the first oil passage and the second oil passage is controlled by the valve assembly. A third oil passage communicating with the second oil passage is installed in the piston compression assembly.

[0012] Preferably, the valve assembly includes a valve piston, a valve body, a valve core member, and a core spring. The valve piston is slidably provided in the inner cavity. The valve body is mounted inside the valve piston, and a valve flow path communicating with the first oil path and the second oil path is provided therethrough. The valve core member is movably provided inside the valve flow path and is used to realize the opening or blocking of the valve flow path. The core spring is accommodated inside the valve flow path, one end is connected to the valve body, the other end is connected to the valve core member, and biases the valve core member to block the valve flow path.

[0013] Preferably, the housing is provided with a first bearing cylinder at a position corresponding to the front end of the camshaft, a position-limiting mounting seat is installed at a position corresponding to the rear end of the camshaft, a second bearing cylinder is installed on the position-limiting mounting seat, the midpoints of the first bearing cylinder and the second bearing cylinder are located on the same axis, and the camshaft is provided to penetrate through the first bearing cylinder and the second bearing cylinder.

[0014] One or more of the above-described means of the eccentric cam door closer for a glass door according to an embodiment of the present invention have at least one of the following technical effects. This eccentric cam door closer for a glass door has a novel structure. The door body of the door is attached to the housing, and by the cooperation of the first roller and the second roller installed in the piston compression assembly and the eccentric cam of the camshaft, the door closer can stably maintain the open and closed states of the door. When the door is opened clockwise to a predetermined position, the first roller fits into the first open arc-shaped groove and is fixed relative to the eccentric cam. When the door is opened counterclockwise to a predetermined position, the second roller fits into the second open arc-shaped groove and is fixed relative to the eccentric cam. When the door is closed to a predetermined position, the first roller fits into the first closed arc-shaped groove, the second roller fits into the second closed arc-shaped groove, and is fixed relative to the eccentric cam. Thereby, the camshaft is prevented from rotating further within the housing, positioning is performed at a predetermined position with respect to the opening and closing angle of the door, and finally the purpose of stopping the door at the predetermined position is achieved, and the reliability can be improved.

[0015] To more clearly explain the technical aspects in the embodiments of the present invention, the drawings required in the description of the embodiments or the prior art are briefly described below. It is obvious that the drawings in the following description are only some embodiments of the present invention, and those skilled in the art can obtain other drawings from these drawings without creative efforts.

Brief Description of the Drawings

[0016]

Figure 1

Figure 2

Figure 3

Figure 4

Best Mode for Carrying Out the Invention

[0017] Hereinafter, embodiments of the present invention will be described in detail. Examples of the embodiments are shown in the drawings. Here, the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the drawings are exemplary for explaining the embodiments of the invention and should not be construed as a limitation on the present invention.

[0018] In the description of the embodiments of the present invention, the orientation or positional relationship indicated by terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is the orientation or positional relationship shown based on the drawings, and is for the purpose of explaining and simplifying the description of the embodiments of the present invention, and does not indicate or imply that the device or member needs to have a specific orientation and be constructed and operate in a specific orientation, so it should not be construed as a limitation on the present invention.

[0019] Furthermore, the terms "first" and "second" are used for the purpose of description and should not be construed as indicating relative importance or implying the number of technical features. Therefore, the features defined as "first" and "second" explicitly or implicitly include one or more features. In the description of the embodiments of the present invention, "a plurality" means two or more unless specifically and clearly limited.

[0020] In the embodiments of the present invention, terms such as "attachment", "connected to each other", "connection", "fixation", etc. should be understood broadly unless otherwise specifically defined. For example, they may be fixedly connected, removably connected, integrated, mechanically connected or electrically connected, directly connected or indirectly connected via an intermediate medium, and may also be internal communication between two members or interaction between two members. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention based on the specific situation.

[0021] (First Embodiment) In the first embodiment of the present invention, as shown in FIGS. 1 to 3, the eccentric cam door closer for a glass door includes a housing 100, a camshaft 200, a valve assembly 300, and a piston compression assembly 400.

[0022] The housing 100 has an inner cavity 110 formed inside the housing 100 along its axial direction.

[0023] The camshaft 200 is rotatably supported in the housing 100, and an eccentric cam 210 that can rotate synchronously is installed on the camshaft 200.

[0024] The valve assembly 300 is slidably installed in the inner cavity 210 and is located on the left side of the eccentric cam 210.

[0025] The piston compression assembly 400 is slidably provided in the inner cavity 110 and is located on the right side of the eccentric cam 210.

[0026] In the piston compression assembly 400, a first roller 410 and a second roller 420 are installed near the end of the eccentric cam 210. On the outer peripheral surface of the eccentric cam 210, a first closing arc-shaped groove 220 and a second closing arc-shaped groove 230 used for closing positioning, as well as a first opening arc-shaped groove 240 and a second opening arc-shaped groove 250 used for opening positioning, are installed.

[0027] In the closed state, the first roller 410 is fitted into the first closing arc-shaped groove 220, and the second roller 420 is fitted into the second closing arc-shaped groove 230. In the fully open state in the clockwise direction, the first roller 410 is fitted into the first opening arc-shaped groove 240. In the fully open state in the counterclockwise direction, the second roller 420 is fitted into the second opening arc-shaped groove 250.

[0028] Specifically, in this embodiment, this eccentric cam door closer for a glass door has a novel structure. The door body of the door is attached to the housing 100 and is installed in the piston compression assembly 400. Through the linkage between the first roller 410 and the second roller 420 and the eccentric cam 210 of the camshaft 200, the door closer can stably maintain the open and closed states of the door. When the door is opened clockwise to a predetermined position, the first roller 410 fits into the first opening arc-shaped groove 240 and is relatively fixed to the eccentric cam 210. When the door is opened counterclockwise to a predetermined position, the second roller 420 fits into the second opening arc-shaped groove 250 and is relatively fixed to the eccentric cam 210. When the door is closed to a predetermined position, the first roller 410 fits into the first closing arc-shaped groove 220, the second roller 420 fits into the second closing arc-shaped groove 230, and they are relatively fixed to the eccentric cam 210. Thereby, the camshaft 200 is prevented from rotating further within the housing 100, positioning is performed at a predetermined position with respect to the opening and closing angle of the door, and finally the purpose of stopping the door at the predetermined position is achieved, and the reliability can be improved.

[0029] (Second Embodiment) In the second embodiment of the present invention, as shown in FIG. 2, the first roller 410 and the second roller 420 always contact the outer peripheral surface of the eccentric cam 210 regardless of the rotational position of the eccentric cam 210, suppressing the generation of a gap between the first roller 410 and the second roller 420 and the eccentric cam 210.

[0030] Specifically, in this embodiment, the first roller 410 and the second roller 420 always contact the outer peripheral surface of the eccentric cam 210. Therefore, when the camshaft 200 rotates within the housing 100, the first roller 410 and the second roller 420 are subject to a damping action on the eccentric cam 210. As a result, the instantaneous speed when the door is closed is reduced, sufficient buffering by the door closer is realized when the door is closed, and the buffering effect of the door closer is enhanced.

[0031] Other parts of this embodiment are the same as those of the first embodiment. For features not described in this embodiment, the interpretation of the first embodiment is applied, and the description is omitted here.

[0032] (Third Embodiment) In the third embodiment of the present invention, as shown in FIG. 2, a spring member 430 is installed in the piston compression assembly 400. The spring member 430 presses the first roller 410 and the second roller 420, always making the first roller 410 and the second roller 420 flexibly contact the outer peripheral surface of the eccentric cam 210.

[0033] Specifically, in this embodiment, the spring member 430 has a predetermined elasticity. The moving first roller 410 and second roller 420 flexibly contact the outer peripheral surface of the eccentric cam 210 via the spring member 430. Furthermore, the effect of a flexible clamp on the eccentric cam 210 is realized, suppressing damage to the eccentric cam 210 due to excessive pressing and enhancing the usage effect.

[0034] Other parts of this embodiment are the same as those of the second embodiment. For features not described in this embodiment, the interpretation of the second embodiment is applied, and the description is omitted here.

[0035] (Fourth Embodiment) In the fourth embodiment of the present invention, as shown in FIG. 2, the piston compression assembly 400 further includes a compression piston block 440 slidably provided in the inner cavity 110. One end of the spring member 430 abuts against and is supported by the housing 100, and the other end is inserted into the compression piston block 440 and abuts against and is supported by the compression piston block 440. In the compression piston block 440, two fixed pins 450 are provided at intervals at the end close to the eccentric cam 210, and a first roller 410 and a second roller 420 are rotatably attached to the two fixed pins 450, respectively.

[0036] Specifically, in this embodiment, the compression piston block 440 and the inner wall of the inner cavity 110 slide in unison, and the guide configuration for axially synchronizing the compression piston block 440 is reduced. During use, the compression piston block 440 is pushed by the spring member 430 to move. The compression piston block 440 moves in the longitudinal direction of the housing 100 by the guiding function of the inner cavity 110. Therefore, the first roller 410 and the second roller 420 accurately abut against the eccentric cam 210, enhancing the reliability of operation.

[0037] Other parts of this embodiment are the same as those of the third embodiment. For features not described in this embodiment, the interpretation of the third embodiment is applied, and the description is omitted here.

[0038] (Fifth Embodiment) In the fifth embodiment of the present invention, as shown in FIG. 2, the spring member 430 includes an inner spring 431 and an outer spring 432. The outer spring 432 covers the outside of the inner spring 431. One ends of the outer spring 432 and the inner spring 431 simultaneously abut against and are supported by the housing 100. The other ends of the outer spring 432 and the inner spring 431 are simultaneously inserted into the compression piston block 440 and abut against and are supported by the compression piston block 440.

[0039] Specifically, in this embodiment, the spring member 430 has a simple structure and a reasonable design. When the spring member 430 is stretched or compressed under force, both the inner spring 431 and the outer spring 432 stretch or compress accordingly and do not interfere with each other. Therefore, when the inner spring 431 and the outer spring 432 are used in combination, deformation is less likely to occur, and the service life of the inner spring 431 and the outer spring 432 can be effectively increased. Due to the composite design, the elasticity of the spring member 430 is greatly improved, and the verticality and stability of the spring force are ensured. In addition, it can effectively prevent the inner spring 431 and the outer spring 432 from being damaged due to excessive load.

[0040] Other parts of this embodiment are the same as those of the fourth embodiment. For the features not described in this embodiment, the interpretation of the fourth embodiment is applied, and the description is omitted here.

[0041] (Sixth Embodiment) In the sixth embodiment of the present invention, as shown in FIGS. 1-2, the inner cavity 110 is partitioned by the valve assembly 300, and the first oil passage 500 and the second oil passage 600 located on both sides of the valve assembly 300 are formed. The communication between the first oil passage 500 and the second oil passage 600 is controlled by the valve assembly 300. A third oil passage 700 communicating with the second oil passage 600 is installed in the piston compression assembly 400.

[0042] Specifically, in this embodiment, hydraulic oil is contained in both the first oil passage 500 and the third oil passage 700. As the housing 100 rotates with the rotation of the door body, the positions of the first roller 410 and the second roller 420 in the eccentric cam 210 change. As a result, the volume of the third oil passage 700 changes, the hydraulic oil in the second oil passage 600 and the third oil passage 700 flows, a pressure difference is generated between the first oil passage 500 and the second oil passage 600, and the state of the valve assembly 300 changes. Therefore, hydraulic oil flows between the first oil passage 500 and the second oil passage 600, and the balance of the pressure difference between the first oil passage 500 and the second oil passage 600 is maintained. That is, the flow of the hydraulic oil in the first oil passage 500, the second oil passage 600, and the third oil passage 700 can be adjusted according to the movement of the door body.

[0043] Other parts of this embodiment are the same as those of the first embodiment. For features not described in this embodiment, the interpretation of the first embodiment is applied, and the description is omitted here.

[0044] (Seventh Embodiment) In the seventh embodiment of the present invention, as shown in FIG. 4, the valve assembly 300 includes a valve piston 310, a valve body 320, a valve core member 340, and a core spring 350.

[0045] The valve piston 310 is slidably provided in the inner cavity 110.

[0046] The valve body 320 is attached to the valve piston 310. The valve body 320 is provided with a valve flow passage 330 that communicates with the first oil passage 500 and the second oil passage 600, respectively.

[0047] The valve core member 340 is movably provided in the valve flow passage 330 and is used to realize the opening or blocking of the valve flow passage 330.

[0048] The core spring 350 is accommodated in the valve flow path 330, one end is connected to the valve body 320, the other end is connected to the valve core member 340, and the valve core member 340 is biased to block the valve flow path 330.

[0049] Specifically, in this embodiment, the movement of the valve core member 340 realizes the opening or blocking of the valve flow path 330. The installation of the core spring 350 ensures the accuracy of the movement of the valve core member 340. When a pressure difference occurs between the first oil path 500 and the second oil path 600, the valve core member 340 pushed by the hydraulic pressure moves in the valve flow path 330 while overcoming the elastic force of the core spring 350, and releases the valve flow path 330. When the pressure difference between the first oil path 500 and the second oil path 600 is balanced, the valve core member 340 is pushed by the elastic force of the core spring 350, moves in the valve flow path 330, returns to its original position, and blocks the valve flow path 330. The state of the valve assembly 300 automatically changes, and the reliability is high.

[0050] Other parts of this embodiment are the same as those of the sixth embodiment. For the features not described in this embodiment, the interpretation of the sixth embodiment is applied, and the description is omitted here.

[0051] (Eighth Embodiment)

[0052] In the seventh embodiment of the present invention, as shown in FIG. 1, The housing 100 is provided with a first bearing cylinder 120 at a position corresponding to the front end of the camshaft 200, a position-limiting mounting seat 130 is installed at a position corresponding to the rear end of the camshaft 200, and a second bearing cylinder 140 is installed on the position-limiting mounting seat 130. The midpoints of the first bearing cylinder 120 and the second bearing cylinder 140 are located on the same axis, and the camshaft 200 is provided to penetrate through the first bearing cylinder 120 and the second bearing cylinder 140.

[0053] Specifically, in this embodiment, the main function of the first bearing cylinder 120 and the second bearing cylinder 140 is to fix the camshaft 200. When the camshaft 200 rotates, the first bearing cylinder 120 and the second bearing cylinder 140 play a role in reducing vibration, support the balance and stability of the camshaft 200, reduce friction and wear, and can extend the service life of the camshaft 200.

[0054] Other parts of this embodiment are the same as those of the first embodiment. For the features not described in this embodiment, the interpretation of the first embodiment shall apply, and the description thereof is omitted here.

[0055] The above are only preferred embodiments of the present invention, and do not limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention shall all be included within the protection scope of the present invention.

Description of Reference Numerals

[0056] 100 Housing 110 Inner cavity 120 First bearing cylinder 130 Position-limiting mounting seat 140 Second bearing cylinder 200 Camshaft 210 Eccentric cam 220 First closed arc-shaped groove 230 Second closed arc-shaped groove 240 First open arc-shaped groove 250 Second open arc-shaped groove 300 Valve assembly 310 Valve piston 320 Valve body 330 Valve flow path 340 Valve core member 350 Core spring 400 Piston compression assembly 410 First roller 420 Second roller 430 Spring member 431 Inner spring 432 Outer spring 440 Compression piston block 450 Fixed pin 500 First oil passage 600 Second oil passage 700 Third oil passage

Claims

1. An eccentric cam door closer for a glass door, a housing, a camshaft, a valve assembly, and a piston compression assembly; The housing has an inner cavity formed therein along an axial direction thereof, the camshaft is rotatably supported within the housing, and an eccentric cam is mounted on the camshaft and rotatable in synchronism with the camshaft; the valve assembly is slidably mounted within the bore and is located to the left of the eccentric cam; the piston compression assembly is slidably disposed within the bore and is located to the right of the eccentric cam; a first roller and a second roller are disposed on the piston compression assembly near an end of the eccentric cam; a first closing arc groove and a second closing arc groove used for closing positioning, and a first opening arc groove and a second opening arc groove used for opening positioning are provided on an outer circumferential surface of the eccentric cam; In a closed state, the first roller is fitted into the first closing arcuate groove, and the second roller is fitted into the second closing arcuate groove; In a fully open state in a clockwise direction, the first roller is fitted into the first open arc-shaped groove; In the fully open state in the counterclockwise direction, the second roller is fitted into the second open arc-shaped groove. An eccentric cam door closer for glass doors.

2. 2. The eccentric cam door closer for glass doors according to claim 1, The first roller and the second roller always contact the outer circumferential surface of the eccentric cam regardless of the rotational position of the eccentric cam, thereby suppressing the occurrence of gaps between the first roller and the eccentric cam and between the second roller and the eccentric cam. An eccentric cam door closer for glass doors.

3. The eccentric cam door closer for glass doors according to claim 2, a spring member disposed within the piston compression assembly; The spring member presses the first roller and the second roller, and always flexibly brings the first roller and the second roller into contact with the outer circumferential surface of the eccentric cam. An eccentric cam door closer for glass doors.

4. The eccentric cam door closer for glass doors according to claim 3, The piston compression assembly further includes a compression piston block slidably disposed within the bore; The spring member has one end supported in contact with the housing, and the other end inserted into the compression piston block and supported in contact with the compression piston block, The compression piston block is provided with two fixed pins spaced apart at an end close to the eccentric cam, and the first roller and the second roller are rotatably attached to the two fixed pins, respectively. An eccentric cam door closer for glass doors.

5. The eccentric cam door closer for glass doors according to claim 4, The spring member includes an inner spring and an outer spring, the outer spring is placed on the outside of the inner spring, one ends of the outer spring and the inner spring are simultaneously supported in contact with the housing, and the other ends of the outer spring and the inner spring are simultaneously inserted into the compression piston block and supported in contact with the compression piston block. An eccentric cam door closer for glass doors.

6. 2. The eccentric cam door closer for glass doors according to claim 1, The bore body is partitioned by the valve assembly, and a first oil passage and a second oil passage are formed on both sides of the valve assembly. The communication between the first oil passage and the second oil passage is controlled by the valve assembly. A third oil passage that is connected to the second oil passage is provided in the piston compression assembly. An eccentric cam door closer for glass doors.

7. 7. The eccentric cam door closer for glass doors according to claim 6, The valve assembly includes a valve piston, a valve body, a valve core member, and a core spring. The valve piston is slidably disposed within the bore body, the valve body is attached in the valve piston, and has valve flow passages extending therethrough that communicate with the first oil passage and the second oil passage, respectively; The valve core member is movably disposed in the valve flow passage and is used to open or close the valve flow passage; The core spring is housed in the valve flow passage, has one end connected to the valve body, and the other end connected to the valve core member, and biases the valve core member to close the valve flow passage. An eccentric cam door closer for glass doors.

8. 2. The eccentric cam door closer for glass doors according to claim 1, The housing has a first bearing sleeve installed at a position corresponding to a front end of the camshaft, a position limiting mounting seat installed at a position corresponding to a rear end of the camshaft, a second bearing sleeve installed on the position limiting mounting seat, the midpoints of the first bearing sleeve and the second bearing sleeve are located on the same axis, and the camshaft is provided to pass through the first bearing sleeve and the second bearing sleeve. An eccentric cam door closer for glass doors.

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