door closer
By designing a door closing device that includes a housing, a rotating mechanism, and a damping mechanism, the problem of sliding doors closing too quickly or too quickly has been solved, achieving a slow and smooth closing effect and reducing closing noise and the risk of users being trapped.
Patent Information
- Application Number
- CN202611240860.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-08-14
- Publication Date
- 2026-11-06
AI Technical Summary
Existing sliding door closing mechanisms may cause problems such as excessive closing noise or users getting trapped if the closing speed is too fast or the closing time is too short.
The door closing device is designed with a housing, a first rotating mechanism, a damping mechanism, and an elastic element. It achieves automatic door closing through a mechanical structure and slows down the closing speed and time during the closing process. The closing speed is limited by a damper and a one-way transmission structure.
It effectively solves the problem of closing the door too quickly or in too short a time, reduces the noise of closing the door and avoids the risk of users getting their hands caught, achieving a slow and smooth closing effect.
Smart Images
Figure CN123044174A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of door and window fittings technology, and in particular to a door closing device. Background Technology
[0002] A sliding door is a type of door that opens and closes by sliding horizontally. Unlike traditional hinged doors that rotate around an axis, sliding doors move parallel to a track. The closing mechanism, often called a door closer, is a mechanical or hydraulic device installed on the door or door frame. Its function is to automatically close the door after it has been opened, and it is mostly used for hinged doors. For sliding doors, current technology mostly uses tension springs to achieve the automatic closing function. When a sliding door is opened by a pushing force, the tension spring deforms and stores elastic force; after the pushing force is removed, the elastic force stored in the tension spring acts on the sliding door, causing it to close. However, during the closing process, the elastic force of the tension spring acts directly on the sliding door without any restriction, which can lead to situations such as the sliding door closing too quickly, causing the user to be trapped, or the door closing too fast, resulting in excessively loud closing noise. Summary of the Invention
[0003] This application provides a door closing device to solve at least one technical problem in the prior art.
[0004] This application provides a door closing device, which includes a housing, on which a first rotating mechanism and a damping mechanism are provided. The first rotating mechanism includes: A first rotating shaft is rotatably connected to the housing; A drive wheel, which is tractively connected to the first rotating shaft, is configured to roll toward a first side extending in the direction of the guide structure and to drive the first rotating shaft to rotate in a first direction; and An elastic element, the first end of which is connected to the first rotating shaft and accumulates elastic force when the first rotating shaft rotates in the first direction; the elastic force is configured to drive the first rotating shaft to rotate in the second direction and drive the drive wheel to roll toward the second side of the extension direction of the guide structure via the first rotating shaft; the second end of the elastic element is fixed to the housing. The damping mechanism is connected to the first rotating shaft and is configured to provide resistance when the first rotating shaft rotates in the second direction to limit the rolling speed of the drive wheel.
[0005] In some embodiments, the elastic element includes a coil spring sleeved on the outside of the first rotating shaft, with a first end of the coil spring fixed to the first rotating shaft.
[0006] In some implementations, the drive wheel is coaxially connected to the first rotating shaft and is circumferentially limited.
[0007] In some embodiments, a rack is also included, which is configured to be stationary relative to the guide structure and extends along the extension direction of the guide structure; the drive wheel is configured as a first gear that meshes with the rack.
[0008] In some embodiments, a support wheel is also included, which is rotatably connected to the housing and configured to roll in connection with the guide structure as the housing moves along the extension direction of the guide structure, and to provide support to the housing.
[0009] In some embodiments, a guide rail is also included, which is configured to be disposed on the guide structure and extend along the extension direction of the guide structure; the support wheel is rotatable along the guide rail.
[0010] In some embodiments, the damping mechanism includes a damper and a one-way transmission structure, the one-way transmission structure comprising: A transmission component, wherein the damper is connected to the transmission component; An eccentric wheel, the protrusion of which is connected to the transmission member; and A one-way mechanism, wherein the one-way mechanism is coaxially rotatably connected to the eccentric wheel; The first rotating shaft is connected to the one-way mechanism, which drives the eccentric wheel to rotate when the first rotating shaft rotates in the second direction. The damper limits the rotational speed of the eccentric wheel through the transmission component.
[0011] In some embodiments, the transmission element is configured as a swing block, the swing block having a first through hole, the swing block being able to swing relative to the housing in a third direction; The eccentric wheel has a circular outer cross-sectional profile and a second through hole with a circular inner wall. The central axis of the eccentric wheel and the central axis of the second through hole are parallel to each other but offset from each other. The one-way mechanism is located in the second through hole. The eccentric wheel is rotatably disposed within the first through hole, and in the third direction, the outer wall of the eccentric wheel abuts against the inner wall of the first through hole.
[0012] In some embodiments, the one-way mechanism includes a wheel with at least one inwardly extending slot on its outer wall; the slot has a first side and a second side along the circumference of the wheel, the first side of the slot forming a first space with the inner wall of a second through hole, and the second side of the slot forming a second space with the inner wall of the second through hole; in the radial direction of the wheel, the inner distance of the first space is less than the inner distance of the second space; a roller is disposed within the slot, and the roller is movable within the slot along the circumference of the wheel; When the roller moves to the first space, it is in an interference fit with the inner wall of the first space; when the roller moves to the second space, it is in a clearance fit with the inner wall of the second space.
[0013] In some embodiments, the housing is provided with a second rotating mechanism, the second rotating mechanism including a second rotating shaft, the second rotating shaft being rotatably connected to the housing; the second rotating shaft being coaxially connected to the one-way mechanism and having a circumferential limiting fit; the first rotating shaft being drively connected to the second rotating shaft.
[0014] Compared with the prior art, this application realizes the function of automatic door closing through mechanical structure, and delays the closing time and reduces the closing speed during the automatic closing process, thus solving the problems in the prior art that cause excessive noise due to excessive closing speed or cause users to be trapped due to insufficient closing time. Attached Figure Description
[0015] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. Wherein: Figure 1 This is a schematic diagram of the overall structure of an application example in this application embodiment; Figure 2 for Figure 1 Cross-sectional view along the AA direction; Figure 3 This is a schematic diagram of the combination of the guide structure and the door closing device in an embodiment of this application; Figure 4 for Figure 3 A partial structural diagram from another perspective; Figure 5 for Figure 4 Cross-sectional view along the BB direction; Figure 6 This is a schematic diagram of the overall structure of the first type of door closing device in the embodiments of this application; Figure 7 This is a schematic diagram of the exploded structure of the first type of door closing device in the embodiments of this application; Figure 8This is an exploded structural diagram of the first rotating mechanism in an embodiment of this application; Figure 9 This is an exploded view of the second rotating mechanism in an embodiment of this application; Figure 10 This is a schematic diagram of a unidirectional transmission structure in an embodiment of this application; Figure 11 This is a schematic diagram and a partial enlarged view of the one-way mechanism in the embodiments of this application; Figure 12 for Figure 11 A partial structural schematic diagram in the enlarged view; Figure 13 This is one embodiment of the first door closing device in the present application. Figure 14 This is one embodiment of the first door closing device in the present application. Figure 15 and Figure 16 This is a schematic diagram of the first rotating mechanism and unidirectional transmission structure of the second type of door closing device in this application embodiment.
[0016] Explanation of reference numerals in the attached figures: 10-Door leaf; 101-Frame; 20-Guide structure; 201-Slide groove; 202-Guide rail; 203-Opening; 30, 31, 32 - Door closing device; 301 - Housing; 3011 - Cavity; 3012 - Main housing; 30121 - First side plate; 30122 - Second side plate; 3013 - Cover plate; 3014 - Limiting slot; 3015 - First mounting hole; 3016 - Second mounting hole; 302 - First rotating mechanism; 3021 - First gear; 3022 - First rotating shaft; 30221 - Mounting slot; 3023 - First bearing; 303 - Coil spring; 304 - Second rotating mechanism; 3041- Second gear; 3042- Second rotating shaft; 3043- Second bearing; 3051- Swing block; 3052- First through hole; 3053- Eccentric wheel; 3054- Second through hole; 30541- Inner wall; 3055- Limiting block; 306- One-way mechanism; 3061- Rotating wheel; 3062- Slot; 3063, 3063a, 3063b- Rollers; 307- Damper; 308- Support wheel; 309- Roller; 40-Rack; 50 - Connector; 501 - Adjusting bolt; 502 - Connecting plate; 60 - Pulley accessories; 601 - Pulley. Detailed Implementation
[0017] The present application will now be described in detail with reference to the accompanying drawings and embodiments. Various examples are provided by way of explanation and not by way of limitation. In fact, those skilled in the art will recognize that modifications and variations can be made to the present application without departing from the scope or spirit thereof. For example, a feature shown or described as part of one embodiment may be used in another embodiment to produce yet another embodiment. Therefore, it is desirable that the present application encompass such modifications and variations that fall within the scope of the appended claims and their equivalents.
[0018] In the description of this application, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and do not require that this application be constructed and operated in a specific orientation, and therefore should not be construed as limiting this application. The terms "connected," "linked," and "set up" used in this application should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; direct connections or indirect connections through intermediate components; wired connections, radio connections, or wireless communication signal connections. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.
[0019] The accompanying drawings illustrate one or more examples of this application. The detailed description uses numerical and alphabetic designations to refer to features in the drawings. Similar or analogous designations in the drawings and description have been used to refer to similar or analogous parts of this application. As used herein, the terms “first,” “second,” and “third,” etc., are used interchangeably to distinguish one component from another and are not intended to indicate the location or importance of individual components.
[0020] like Figure 1 and Figure 2 As shown in the embodiment of this application, a sliding door includes a door leaf 10 and a guide structure 20. The guide structure 20 is fixedly installed on the upper crossbeam of the door frame and extends along a predetermined direction. The guide structure 20 includes a slide groove 201 with an opening 203 facing downwards. The opening 203 of the slide groove 201 has an inwardly extending flange, and the two flanges form a guide rail 202, which extends along the extending direction of the guide structure 20. A pulley fitting 60 is installed on the top of the door leaf 10. The pulley 601 of the pulley fitting 60 is disposed in the slide groove 201 and is slidably connected to the guide rail 202 along the extending direction of the guide structure 20.
[0021] like Figure 1 and Figure 3As shown, an embodiment of this application discloses a first door closing device 30, which is mounted on the top frame 101 of the door leaf 10 via a connector 50. The door closing device 30 is disposed within a groove 201 of a guide structure 20 and is movable along the extending direction of the guide structure 20. A rack 40 is provided within the groove 201, and the rack 40 is fixedly mounted on the top wall of the groove 201, with its teeth facing the opening 203 of the groove 201. The rack 40 extends along the extending direction of the guide structure 20.
[0022] like Figures 5 to 8 As shown, the door closing device 30 includes a housing 301, which has a cavity 3011. A first rotating mechanism 302, a second rotating mechanism 304, and a damping mechanism are installed within the cavity 3011. The first rotating mechanism 302 includes a first rotating shaft 3022, which is rotatably connected to the housing 301. A coil spring 303 is coaxially sleeved on the first rotating shaft 3022. The inner torque end of the coil spring 303 is fixed to the first rotating shaft 3022, and the outer torque end of the coil spring 303 is fixed to the housing 301. A first gear 3021 is coaxially mounted on the first rotating shaft 3022. The first gear 3021 and the first rotating shaft 3022 are circumferentially limited to allow them to rotate synchronously. A portion of the first gear 3021 protrudes from the top of the housing 301 and meshes with a rack 40. The second rotating mechanism 304 includes a second rotating shaft 3042, which is rotatably connected to the housing 301. A second gear 3041 is coaxially mounted on the second rotating shaft 3042. The second gear 3041 and the second rotating shaft 3042 are circumferentially limited to ensure synchronous rotation. The first gear 3021 meshes with the second gear 3041. The damping mechanism includes a damper 307 and a one-way transmission structure. The first end of the damper 307 is fixedly mounted on the housing 301. The one-way transmission structure includes a one-way mechanism 306, which is coaxially connected to the second rotating shaft 3042. An eccentric wheel 3053 is coaxially connected to the one-way mechanism 306. The protrusion of the eccentric wheel 3053 is connected to the second end of the damper 307 via a transmission component. The one-way mechanism 306 can drive the eccentric wheel 3053 only in one direction of rotation.
[0023] In some embodiments, such as Figures 6 to 8As shown, the housing 301 includes a main housing 3012 and a cover plate 3013. The main housing 3012 has a first side plate 30121 and a second side plate 30122 disposed opposite to each other. The cavity 3011 is constructed between the first side plate 30121 and the second side plate 30122. Both the first side plate 30121 and the second side plate 30122 are provided with a first mounting hole 3015 and a second mounting hole 3016, and the two first mounting holes 3015 are axially aligned, and the two second mounting holes 3016 are axially aligned. A first bearing 3023 is installed in the first mounting hole 3015, and the first rotating shaft 3022 is rotatably connected to the housing 301 through the first bearing 3023. A second bearing 3043 is installed in the second mounting hole 3016, and the second rotating shaft 3042 is rotatably connected to the housing 301 through the second bearing 3043.
[0024] like Figure 8 As shown, in some embodiments, the outer wall of the first rotating shaft 3022 is provided with a mounting groove 30221 extending along the axial direction of the first rotating shaft 3022, and the inner torque end of the coil spring 303 is fixed in the mounting groove 30221. The first rotating shaft 3022 and the first gear 3021 can achieve circumferential limiting fit through key connection, pin / cam key fit, or interference fit, and the second rotating shaft 3042 and the second gear 3041 can adopt the same circumferential limiting fit.
[0025] In an example of an application, such as Figure 1As shown, pushing the door leaf 10 to the left causes the door closing device 30 to move to the left. When the door leaf 10 moves to the left, the first gear 3021 engages with the rack 40, causing the first gear 3021 to rotate clockwise. When the first shaft 3022 rotates synchronously with the first gear 3021, it drives the inner torque end of the coil spring 303 to rotate, causing the coil spring 303 to accumulate elastic force. Simultaneously, the first gear 3021 drives the second gear 3041, causing the second gear 3041 to rotate counterclockwise, which in turn drives the second shaft 3042 to rotate synchronously counterclockwise. In this embodiment, the one-way mechanism 306 is configured to transmit power only when rotating clockwise; power transmission is interrupted when rotating counterclockwise. Since the second shaft 3042 is rotating counterclockwise, the one-way mechanism 306 cannot transmit power from the second shaft 3042 to the eccentric wheel 3053. At this time, the eccentric wheel 3053 is stationary relative to the housing. After the push force of the door leaf 10 is released, the stored elastic force of the coil spring 303 drives the first rotating shaft 3022 to rotate counterclockwise. The first gear 3021 rotates counterclockwise synchronously with the first rotating shaft 3022. The first gear 3021 cooperates with the rack 40 to drive the closing device 30 and the door leaf 10 to move to the right, thereby realizing the automatic closing function. At the same time, the first gear 3021 drives the second gear 3041, causing the second gear 3041 to rotate clockwise, thereby driving the second rotating shaft 3042 to rotate clockwise synchronously. The one-way mechanism 306 can transmit the power of the second rotating shaft 3042 to the eccentric wheel 3053, so that the eccentric wheel 3053 rotates clockwise. The protrusion of the eccentric wheel 3053 transmits the power to the damper 307 through the transmission component. At this time, the damper 307 restricts the rotational speed of the eccentric wheel 3053 in the opposite direction through its own resistance, and further restricts the rotational speed of the first gear 3021 through the power transmission path, thereby limiting the closing speed of the door leaf 10 and extending the closing time. This solution solves the problems in the prior art, such as excessive closing noise caused by excessive closing speed, or user being trapped due to insufficient closing time.
[0026] More specifically, such as Figure 9 and Figure 10As shown, in some embodiments, the transmission component is constructed as a swing block 3051, which has a first through hole 3052. An eccentric wheel 3053 is rotatably disposed within the first through hole 3052. The eccentric wheel 3053 has a second through hole 3054 with a circular inner wall. The outer contour of the cross-section of the eccentric wheel 3053 is circular, and the central axis of the eccentric wheel 3053 and the central axis of the second through hole 3054 are parallel to each other but offset from each other. A one-way mechanism 306 is rotatably disposed within the second through hole 3054 and engages with the eccentric wheel 3053 in a one-way transmission manner. The swing block 3051 can swing relative to the housing 301 in a third direction within the housing 301. A damper 307 is disposed on one side of the swing block 3051 in a third direction. The first end of the damper 307 is fixed to the housing 301, and the second end of the damper 307 is connected to the swing block 3051. In the third direction, the outer wall of the eccentric wheel 3053 abuts against the inner wall of the first through hole 3052, and when the eccentric wheel 3053 rotates, it can drive the swing block 3051 to reciprocate along the third direction. The third direction is perpendicular to the axial direction of the second rotating shaft. The damper 307 can be a bidirectional damper 307, so that the swing block 3051 can provide resistance during the swinging process.
[0027] like Figure 5 and Figure 6 As shown, in some embodiments, the top of the swing block 3051 is slidably engaged with the bottom of the cover plate 3013, and the bottom of the swing block 3051 is slidably engaged with the bottom of the cavity 3011, so that the swing block 3051 is restricted in the vertical direction and cannot move. Furthermore, the cover plate 3013 is provided with a limiting slot 3014 extending in a third direction. The top of the swing block 3051 is provided with an upwardly extending limiting block 3055, which can extend into and slidably engage with the limiting slot 3014. The limiting slot 3014 and the limiting block 3055 cooperate with each other to restrict the movement of the swing block 3051 in the axial direction of the second rotating shaft 3042.
[0028] like Figures 9 to 12As shown, in some embodiments, the one-way mechanism 306 includes a rotating wheel 3061, which is coaxial with and circumferentially limited by a second rotating shaft 3042. The outer wall of the rotating wheel 3061 has three inwardly extending slots 3062, each slot 3062 containing a roller 3063. The roller 3063 can move circumferentially within the slots 3062 along the rotating wheel 3061. The slots 3062 have a first side 30621 and a second side 30622 along the circumferential direction of the rotating wheel 3061. The first side 30621 of the slot 3062 forms a first space with the inner wall 30541 of the second through hole 3054, and the second side 30622 of the slot 3062 forms a second space with the inner wall 30541 of the second through hole 3054. In the radial direction of the rotating wheel 3061, the inner distance d1 of the first space is less than the inner distance d2 of the second space. Roller 3063 can move between the first space and the second space, and the outer diameter of roller 3063 is greater than d1 so that roller 3063 can have an interference fit with the inner wall of the first space when it moves to the first space; the outer diameter of roller 3063 is less than d2 so that roller 3063 can have a clearance fit with the inner wall of the second space when it moves to the second space. Figure 11 As shown, when the rotating wheel 3061 rotates counterclockwise, the roller 3063a moves to the second space. The roller 3063a is clearance-fitted with the inner wall of the second space, and the power transmission between the rotating wheel 3061 and the eccentric wheel 3053 is interrupted. When the rotating wheel 3061 rotates clockwise, the roller 3063b moves to the first space. The roller 3063b is interference-fitted with the inner wall of the first space, and the rotating wheel 3061 can transmit power to the eccentric wheel 3053 so that the eccentric wheel 3053 rotates synchronously with the rotating wheel 3061.
[0029] like Figures 3 to 7 As shown, in some embodiments, the housing 301 is provided with support wheels 308, which are rotatably connected to the housing 301. When the housing 301 moves along the extending direction of the guide structure 20, the support wheels 308 are rolled in connection with the guide rail 202 of the guide structure 20 to provide support for the housing 301. In this embodiment, there are two sets of support wheels 308, with two support wheels 308 in each set. The two sets of support wheels 308 are located at both ends of the moving direction of the housing 301. In this embodiment, the guide rail 202 is constructed as a groove structure, allowing the support wheels 308 to roll under the constraint of the groove structure.
[0030] like Figure 1As shown, in some embodiments, the connector 50 includes a connecting plate 502 and an adjusting bolt 501. The connecting plate 502 is fixed to the door leaf 10, and the first end of the adjusting bolt 501 is rotatably connected to the bottom of the housing 301. The second end of the adjusting bolt 501 is rotatably threaded to the connecting plate 502. Rotating the adjusting bolt 501 adjusts the distance between the housing 301 and the door leaf 10. Furthermore, the adjusting bolt 501 can pass through the opening of the guide structure 20 and move along the extending direction of the guide structure 20. Of course, if the adjusting bolt 501 does not have an adjusting function, it can also be used only for the connection between the door closing device 30 and the door leaf 10.
[0031] like Figure 13 As shown, in some embodiments, the pulley fitting 60 is disposed at the bottom of the door leaf 10, and the pulley fitting 60 slides on the ground or on a track in the ground. Please refer to Figure 3 The rack 40 can be mounted on the guide rail 202 of the guide structure 20. The difference between the door closing device 31 in this embodiment and the previous embodiment is that a portion of the first gear 3021 can protrude from the bottom of the housing 301 and mesh with the rack 40. This solution can also achieve automatic, slow door closing.
[0032] like Figure 14 As shown in the above implementation scheme, in some embodiments, the first gear 3021 will not directly contact the guide structure 20. One alternative is that the first rotating shaft 3022 is coaxially connected to a roller 309, and the roller 309 and the first rotating shaft 3022 are circumferentially limited to each other so that they can rotate synchronously. When the door closing device 32 moves within the guide structure 20, the roller 309 is in rolling contact with the guide rail 202. The roller 309 drives the first rotating shaft 3022 and the first gear 3021 to rotate synchronously. The first gear 3021 meshes with the second gear 3041, thereby driving the second rotating shaft 3042 to rotate. At this time, the first gear 3021 is only used for power transmission between the first rotating shaft 3022 and the second rotating shaft 3042. When the door closes, the coil spring 303 drives the first rotating shaft 3022 and the roller 309 to rotate synchronously, causing the roller 309 to roll relative to the guide rail 202. Through the friction between the roller 309 and the guide rail 202, the closing device 32 and the door leaf 10 are driven to move, thus achieving the automatic closing function. Simultaneously, the first gear 3021 meshes with the second gear 3041, driving the second rotating shaft 3042 to rotate in the opposite direction. The one-way mechanism 306 is triggered and provides resistance to achieve the slow closing function. The roller 309 can be made of a material with good friction (such as rubber) to increase the friction between the roller 309 and the guide rail 202.
[0033] like Figure 15 and Figure 16 As shown (please refer to) Figure 6 and Figure 7This application discloses a second type of door closing device, which includes a housing 301. A first rotating mechanism 302 and a damping mechanism are provided on the housing 301. The first rotating mechanism 302 includes a first rotating shaft 3022, which is rotatably connected to the housing 301 via a first bearing 3023. A first gear 3021 is coaxial with the first rotating shaft 3022 and circumferentially limited. A coil spring 303 is coaxially connected to the first rotating shaft 3022, with its inner torque end fixed to the outer wall of the first rotating shaft 3022 and its outer torque end fixed to the housing 301. The damping mechanism includes a damper 307 and a one-way transmission structure. The first end of the damper 307 is fixedly mounted on the housing 301. The one-way transmission structure includes a one-way mechanism 306, which is coaxially connected to the first rotating shaft 3022. A one-way mechanism 306 is coaxially connected to an eccentric wheel 3053. The protrusion of the eccentric wheel 3053 is connected to the second end of the damper 307 via a transmission component (in the figure, the transmission component is a swing block 3051). The one-way mechanism 306 can drive the eccentric wheel 3053 in only one direction of rotation. In this embodiment, a rack 40 is provided within the guide structure 20, and a first gear 3021 meshes with the rack 40.
[0034] In one application example, pushing the door leaf 10 to the left causes the door closing device 30 to move to the left. As it moves to the left, the first gear 3021 engages with the rack 40, causing the first gear 3021 to rotate clockwise. When the first shaft 3022 rotates synchronously with the first gear 3021, the coil spring 303 accumulates elastic force. In this embodiment, the one-way mechanism 306 is configured to transmit power only when rotating counterclockwise; power is interrupted when rotating clockwise. Because the first shaft 3022 rotates clockwise, the one-way mechanism 306 cannot transmit power from the first shaft 3022 to the eccentric wheel 3053. After the push force of the door leaf 10 is released, the stored elasticity of the coil spring 303 drives the first rotating shaft 3022 to rotate counterclockwise. The first gear 3021 rotates counterclockwise synchronously with the first rotating shaft 3022 and cooperates with the rack 40 to drive the closing device 30 and the door leaf 10 to move to the right, thereby realizing the automatic closing function. At the same time, the one-way mechanism 306 can transmit the power of the first rotating shaft 3022 to the eccentric wheel 3053, so that the eccentric wheel 3053 rotates clockwise. The protrusion of the eccentric wheel 3053 transmits the power to the damper 307 through the transmission component. At this time, the damper 307 restricts the rotation speed of the eccentric wheel 3053 in the opposite direction through its own resistance, and further restricts the rotation speed of the first gear 3021 through the power transmission path, thereby restricting the closing speed of the door leaf 10 and prolonging the closing time. In addition, the first gear 3021 in the second closing device 30 can also be replaced by a roller 309.
[0035] It should be noted that in the first and second door closing devices, the first gear or roller can be understood as a specific structure of the drive wheel in different embodiments. This drive wheel is configured to roll towards a first side extending in the direction of the guide structure and to drive the first rotating shaft to rotate in a first direction. The transmission connection between the drive wheel and the first rotating shaft includes direct connection, meshing transmission, friction transmission, belt transmission, chain transmission, etc., and this application does not impose specific limitations. A coil spring can be understood as one specific structure of an elastic element, with its first end connected to the first rotating shaft, and the elastic element storing elastic force when the first rotating shaft rotates in the first direction. The elastic force is configured to drive the first rotating shaft to rotate in a second direction, and through the first rotating shaft, drive the drive wheel to roll towards the second side extending in the direction of the guide structure. A damping mechanism is connected to the first rotating shaft and configured to provide resistance when the first rotating shaft rotates in the second direction, thereby limiting the rolling speed of the drive wheel. In the above embodiments, the transmission connection between the first and second rotating shafts includes meshing transmission, friction transmission, belt transmission, chain transmission, etc., and this application does not impose specific limitations.
[0036] The above descriptions are merely some embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A door closing device, characterized in that, The system includes a housing, on which a first rotating mechanism and a damping mechanism are provided. The first rotating mechanism includes: A first rotating shaft is rotatably connected to the housing; A drive wheel, which is tractively connected to the first rotating shaft, is configured to roll toward a first side extending in the direction of the guide structure and to drive the first rotating shaft to rotate in a first direction; and An elastic element, the first end of which is connected to the first rotating shaft and accumulates elastic force when the first rotating shaft rotates in the first direction; the elastic force is configured to drive the first rotating shaft to rotate in the second direction and drive the drive wheel to roll toward the second side of the extension direction of the guide structure via the first rotating shaft; the second end of the elastic element is fixed to the housing. The damping mechanism is connected to the first rotating shaft and is configured to provide resistance when the first rotating shaft rotates in the second direction to limit the rolling speed of the drive wheel.
2. The door closing device according to claim 1, characterized in that, The elastic element includes a coil spring, which is sleeved on the outside of the first rotating shaft, and the first end of the coil spring is fixed to the first rotating shaft.
3. The door closing device according to claim 1, characterized in that, The drive wheel is coaxially connected to the first rotating shaft and is circumferentially limited.
4. The door closing device according to claim 1, characterized in that, The damping mechanism includes a damper and a one-way transmission structure, wherein the one-way transmission structure includes: A transmission component, wherein the damper is connected to the transmission component; An eccentric wheel, the protrusion of which is connected to the transmission member; and A one-way mechanism, wherein the one-way mechanism is coaxially rotatably connected to the eccentric wheel; The first rotating shaft is connected to the one-way mechanism, which drives the eccentric wheel to rotate when the first rotating shaft rotates in the second direction. The damper limits the rotational speed of the eccentric wheel through the transmission component.
5. The door closing device according to claim 4, characterized in that, The transmission component is constructed as a swing block, the swing block is provided with a first through hole, and the swing block can swing relative to the housing in a third direction; The eccentric wheel has a circular outer cross-sectional profile and a second through hole with a circular inner wall. The central axis of the eccentric wheel and the central axis of the second through hole are parallel to each other but offset from each other. The one-way mechanism is located in the second through hole. The eccentric wheel is rotatably disposed within the first through hole, and in the third direction, the outer wall of the eccentric wheel abuts against the inner wall of the first through hole.
6. The door closing device according to claim 5, characterized in that, The one-way mechanism includes a rotating wheel, the outer wall of which has at least one inwardly extending slot; the slot has a first side and a second side along the circumference of the rotating wheel, the first side of the slot and the inner wall of the second through hole form a first space, and the second side of the slot and the inner wall of the second through hole form a second space; in the radial direction of the rotating wheel, the inner distance of the first space is less than the inner distance of the second space; a roller is provided in the slot, and the roller can move along the circumference of the rotating wheel within the slot; When the roller moves to the first space, it is in an interference fit with the inner wall of the first space; when the roller moves to the second space, it is in a clearance fit with the inner wall of the second space.
7. The door closing device according to claim 4, characterized in that, The housing is provided with a second rotating mechanism, which includes a second rotating shaft that is rotatably connected to the housing; the second rotating shaft is coaxially connected to the one-way mechanism and is circumferentially limited; the first rotating shaft and the second rotating shaft are drively connected.
8. The door closing device according to any one of claims 1 to 7, characterized in that, It also includes a rack, which is configured to be stationary relative to the guide structure and extends along the extension direction of the guide structure; The drive wheel is configured as a first gear, which meshes with the rack.
9. The door closing device according to any one of claims 1 to 7, characterized in that, It also includes a support wheel, which is rotatably connected to the housing and configured to roll in connection with the guide structure as the housing moves along the extension direction of the guide structure, and to provide support for the housing.
10. The door closing device according to claim 9, characterized in that, It also includes a guide rail configured to be disposed on the guide structure and extend along the extension direction of the guide structure; the support wheel is rotatable along the guide rail.