Manual-automatic integrated door closer and using method thereof

Abstract

The invention belongs to the technical field of door closers, and provides a manual-automatic integrated door closer and a using method thereof.The door closer comprises a bottom plate and a shell, the shell is fixedly installed on the bottom plate, an output shaft is rotatably installed in the shell, one end of the output shaft extends out of the shell, a speed reduction shaft parallel to the output shaft is rotatably installed in the shell, and the speed reduction shaft extends out of the shell; the speed reduction shaft is rotationally connected with the output shaft, and a rotary power piece is fixedly installed in the shell. Compared with the prior art, the door opening device has the following beneficial effects that the output shaft 3 is driven to rotate by rotating the power piece 7 during electrification so that the door can be driven to be opened, the output shaft 3 is driven to rotate reversely under the action of the second elastic piece 24 during outage or no electrification so that the door can be closed, and the door opening mode can be freely adjusted to be manual or automatic; and the flexibility and convenience of equipment use are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of door closers, and in particular relates to a manual-automatic door closer and a use method thereof. Background Art

[0002] The door closer is a spring-like hydraulic device on the door head. When the door is opened, it can be compressed and then released to automatically close the door. It acts like a spring door and can ensure that the door is closed to its initial position accurately and promptly after being opened.

[0003] When the door is opened, the door body drives the connecting rod to move and rotate the transmission gear, driving the rack plunger to move to the right. In the process of the plunger moving to the right, the spring is compressed, and the hydraulic oil in the right chamber is also pressurized. The one-way valve ball on the left side of the plunger opens under the action of oil pressure, and the hydraulic oil in the right chamber flows to the left chamber through the one-way valve. When the door opening process is completed, since the spring is compressed during the opening process, the accumulated elastic potential energy is released, pushing the plunger to the left, driving the transmission gear and the door closer connecting rod to rotate, thereby closing the door. However, there will be obvious resistance when opening the door, and the door will close quickly after opening, making it inconvenient for the elderly, children or people who are not convenient to push the door with objects in hand to open the door, reducing the convenience of the equipment. Summary of the invention

[0004] The object of the present invention is to provide a manual-automatic door closer and a method of using the same, aiming to solve the technical problem in the prior art that there is obvious resistance when opening the door, which reduces the convenience of using the device.

[0005] The present invention is implemented as follows: a manual-automatic door closer comprises a base plate and a housing, wherein the housing is fixedly mounted on the base plate, an output shaft is rotatably mounted in the housing, one end of the output shaft extends out of the housing, a reduction shaft parallel to the output shaft is rotatably mounted in the housing, the reduction shaft is rotatably connected to the output shaft, a rotating power member is fixedly mounted in the housing, a worm is fixedly mounted at the output end of the rotating power member, the worm is skewed and perpendicular to the reduction shaft and the worm is meshed with a worm wheel rotatably mounted on the reduction shaft, and a control assembly for controlling the worm wheel to rotate synchronously with the reduction shaft is arranged in the housing; A cam is fixedly mounted on the output shaft, a connecting column is fixedly mounted on one end of the cam away from the output shaft, the connecting column is connected to a connecting frame slidably mounted in the shell, a support rod is fixedly mounted on one side of the connecting frame, a support plate is provided on the side wall of the shell, a second telescopic rod extending into the shell is fixedly mounted on the support plate, a movable plate is fixedly mounted on the end of the second telescopic rod away from the support plate, a second elastic member distributed around the second telescopic rod is fixedly mounted on the movable plate, an end of the second elastic member away from the movable plate is fixedly connected to the support plate, and the movable plate conflicts with the end of the support rod.

[0006] Further technical solution: A first reduction gear is fixedly mounted on the reduction shaft, and the first reduction gear is meshed with a second reduction gear fixedly mounted on the output shaft.

[0007] Further technical solution: a guide plate is fixedly installed in the shell, the guide plate is parallel to the worm and a connecting frame is slidably installed on the guide plate, and the connecting column is located in the connecting frame and slides.

[0008] Further technical solution: The control component includes an electromagnet, which is fixedly installed in the shell through a support. The electromagnet is an annular structure and is coaxially arranged with the reduction shaft. A slide groove is opened on the reduction shaft and a permanent magnet used in conjunction with the electromagnet is slidably installed on the slide groove. Non-magnetic material is provided at the position where the permanent magnet contacts the reduction shaft. A friction ring is rotatably installed on the surface of the permanent magnet away from the electromagnet. The friction ring is used in conjunction with a friction plate fixedly installed on the worm gear. Both the friction ring and the friction plate are coaxially arranged with the reduction shaft.

[0009] Further technical solution: a first telescopic rod is fixedly installed on the inner bottom surface of the shell, the first telescopic rod is perpendicular to the second telescopic rod and a U-shaped limit frame used in conjunction with the movable plate is fixedly installed on the output end of the first telescopic rod, a first elastic member is fixedly installed on the bottom surface of the limit frame, one end of the first elastic member away from the limit frame is fixedly connected to the bottom side wall of the shell, and the limit frame is connected to the friction ring.

[0010] Further technical solution: The side of the principle support plate of the limit frame is provided with an inclined structure, the inclined structure is located at the end of the limit frame, and a rotating rod used in conjunction with the limit frame is rotatably installed on the bottom surface of the movable plate, and the diameter of the rotating rod is the same as the thickness of the movable plate.

[0011] Further technical solution: A connecting rod is fixedly installed on the side of the limit frame, and a mounting ring is fixedly installed on one end of the connecting rod away from the limit frame. The mounting ring is rotatably connected to the friction ring and is coaxially arranged.

[0012] Further technical solution: a buffer cylinder is fixedly installed on the inner wall of the shell, the buffer cylinder is parallel to the guide plate, a push plate is slidably installed in the buffer cylinder, a sliding rod is fixedly installed on the push plate, the sliding rod extends into the buffer cylinder and a power plate is fixedly installed on the end of the sliding rod away from the push plate, the power plate is slidably connected to the guide plate, a temporary storage cavity is provided at the end of the buffer cylinder away from the power plate, and the temporary storage cavity is connected to the buffer cylinder through a through hole.

[0013] The present invention also provides a method for using a door closer, which is applied to the above-mentioned manual-automatic door closer and comprises the following steps: Step S1: Install the device at a set position through the base plate and connect the output shaft to the door; Step S2: When in use in the power-on state, the control component causes the worm wheel and the reduction shaft to rotate synchronously. After the detection device detects a person coming, the rotating power component drives the worm to rotate, and the worm drives the reduction shaft to rotate synchronously through the meshing worm wheel. The reduction shaft drives the output shaft to rotate, and the output shaft rotates to drive the door to open. After the person passes, the rotating power component rotates in the opposite direction to complete the closing of the door. Step S3: When the power is on, the output shaft rotates to open the door, driving the cam to rotate. The cam drives the connecting frame to move along the guide plate toward the support plate through the connecting column. The connecting frame pushes the movable plate to move through the support rod and compresses the second elastic member. When the power is suddenly cut off due to fire or other reasons, the control component will synchronously disconnect the worm gear from the reduction shaft, so that the worm gear and the reduction shaft are in a free rotation state. At this time, under the action of the second elastic member, the movable plate will be pushed to reset and the output shaft will be driven to rotate in the opposite direction to complete the closing of the door.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The rotating power part 7 drives the worm 8 to rotate, and the worm 8 drives the reduction shaft 4 to rotate synchronously through the meshing worm gear 9, and the reduction shaft 4 drives the output shaft 3 to rotate. The output shaft 3 rotates to drive the door to open, and the subsequent rotating power part rotates in the opposite direction to close the door. Of course, the door can also be pushed open manually. At this time, the output shaft 3 rotates passively, and the cam 29 is driven to rotate when the door is opened. The cam 29 drives the connecting frame 27 to move along the guide plate 28 toward the support plate 21 through the connecting column 30. The connecting frame 27 pushes the movable plate 23 to move through the support rod 26 and compresses the second elastic member 24. Afterwards, under the action of the second elastic member 24, the movable plate 23 will be pushed to reset and the output shaft 3 will be driven to rotate in the opposite direction to complete the closing of the door. When the power is suddenly cut off due to fire or other reasons, the control component 37 will synchronously disconnect the connection between the worm gear 9 and the reduction shaft 4, so that the worm gear 9 and the reduction shaft 4 are in a free rotation state. After that, the automatic closing of the door is completed through the second elastic member 24. The door opening mode can be freely adjusted to manual or automatic, thereby improving the flexibility and convenience of the equipment. In addition, the door can be automatically closed in the event of fire or emergency power outage, thereby improving the safety of the equipment.

[0015] 2. When the power is on, opening the door will cause the movable plate 23 to move past the limit frame 19. When the door is closed subsequently, the output shaft 3 rotates in the opposite direction to reset the connecting frame 27. The movable plate 23 maintains its original position under the action of the limit frame 19. Therefore, during the subsequent rotation of the output shaft 3, the movable plate 23 will not generate additional force on the output shaft 3, thereby reducing the contact pressure between the first reduction gear 5 and the second reduction gear 6, and between the worm 8 and the worm wheel 9, thereby reducing the wear of the equipment and increasing the service life of the equipment. At the same time, it avoids frequent compression and reset of the second elastic member 24, slows down the fatigue process of the material of the second elastic member 24, reduces the probability of damage to the second elastic member 24, and increases the service life of the second elastic member 24.

[0016] 3. When the power is cut off subsequently, the electromagnet 11 no longer applies a repulsive magnetic force to the permanent magnet 13, and the permanent magnet 13 moves downward under the action of gravity. At the same time, under the action of magnetic force, the electromagnet 11 also generates a downward force on the permanent magnet 13 to ensure that the permanent magnet 13 can move downward. The downward movement of the permanent magnet 13 causes the top of the limit frame 19 to drop to the set position. At this time, the limit frame 19 no longer interferes with the movement of the rotating rod 25. Under the action of the second elastic member 24, the movable plate 23 moves until it contacts the support rod 26. After that, the movable plate 23 will push the output shaft 3 to rotate through the support rod 26, the connecting frame 27, the connecting column 30 and the cam 29. The rotation of the output shaft 3 closes the door, ensuring that the door can be automatically closed in time when the power is off, avoiding smoke and open flames from passing through when a fire occurs, and improving fire safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 It is a schematic diagram of the first viewing angle structure of the interior of the shell in the present invention.

[0019] Figure 3 It is a schematic diagram of the structure of the interior of the shell in the present invention from a second viewing angle.

[0020] Figure 4 It is a schematic diagram of the structure of the reduction shaft in the present invention.

[0021] Figure 5 It is a schematic diagram of the cross-sectional structure of the reduction shaft in the present invention.

[0022] Figure 6 It is a structural schematic diagram of the connecting frame in the present invention.

[0023] Figure 7 It is a schematic diagram of the cross-sectional structure of the buffer cylinder in the present invention.

[0024] Figure 8 for Figure 7 A magnified schematic diagram of area A in the middle.

[0025] In the accompanying drawings: 1. bottom plate; 2. shell; 3. output shaft; 4. reduction shaft; 5. first reduction gear; 6. second reduction gear; 7. rotating power part; 8. worm; 9. worm wheel; 10. pillar; 11. electromagnet; 12. slide groove; 13. permanent magnet; 14. friction ring; 15. friction plate; 16. mounting ring; 17. connecting rod; 18. first telescopic rod; 19. limit frame; 20. first elastic part; 21. support plate; 22. second telescopic rod; 23. moving plate; 24. second elastic part; 25. rotating rod; 26. support rod; 27. connecting frame; 28. guide plate; 29. ​​cam; 30. connecting column; 31. buffer cylinder; 32. slide rod; 33. power plate; 34. push plate; 35. temporary storage cavity; 36. through hole; 37. control component. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0027] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0028] like Figure 1-Figure 6 As shown, a manual-automatic door closer provided by the present invention comprises a base plate 1 and a housing 2, the housing 2 is fixedly mounted on the base plate 1, an output shaft 3 is rotatably mounted in the housing 2, one end of the output shaft 3 extends out of the housing 2, a reduction shaft 4 parallel to the output shaft 3 is rotatably mounted in the housing 2, the reduction shaft 4 is rotatably connected with the output shaft 3, a first reduction gear 5 is fixedly mounted on the reduction shaft 4, the first reduction gear 5 is meshed with a second reduction gear 6 fixedly mounted on the output shaft 3, a rotating power member 7 is fixedly mounted in the housing 2, a worm 8 is fixedly mounted on the output end of the rotating power member 7, the worm 8 is skewed and perpendicular to the reduction shaft 4 and the worm 8 is meshed with a worm wheel 9 rotatably mounted on the reduction shaft 4, and a control assembly 37 for controlling the worm wheel 9 to rotate synchronously with the reduction shaft 4 is provided in the housing 2; A cam 29 is fixedly mounted on the output shaft 3, and a connecting column 30 is fixedly mounted on one end of the cam 29 away from the output shaft 3. The connecting column 30 is connected to a connecting frame 27 slidably mounted in the housing 2. A guide plate 28 is fixedly mounted in the housing 2. The guide plate 28 is parallel to the worm 8 and the connecting frame 27 is slidably mounted on the guide plate 28. The connecting column 30 slides in the connecting frame 27. A support rod 26 is fixedly mounted on one side of the connecting frame 27. A support plate 21 is provided on the side wall of the housing 2. A second telescopic rod 22 extending into the housing 2 is fixedly mounted on the support plate 21. A movable plate 23 is fixedly mounted on the end of the second telescopic rod 22 away from the support plate 21. A second elastic member 24 distributed around the second telescopic rod 22 is fixedly mounted on the movable plate 23. An end of the second elastic member 24 away from the movable plate 23 is fixedly connected to the support plate 21, and the movable plate 23 conflicts with the end of the support rod 26.

[0029] In actual application of this embodiment, the device is installed at a set position through the base plate 1 and the output shaft 3 is connected to the door. When used in the power-on state, the control component 37 makes the worm wheel 9 and the reduction shaft 4 rotate synchronously. After the detection device detects a person coming, the rotating power member 7 drives the worm 8 to rotate, and the worm 8 drives the reduction shaft 4 to rotate synchronously through the meshing worm wheel 9. The reduction shaft 4 drives the output shaft 3 to rotate through the meshing first reduction gear 5 and the second reduction gear 6. The rotation of the output shaft 3 can drive the door to open. After the person passes, the rotating power member 7 rotates in the opposite direction to complete the closing of the door. When the output shaft 3 rotates to open the door, the cam 29 is driven to rotate. The cam 29 drives the connecting frame 27 to move along the guide plate 28 toward the support plate 21 through the connecting column 30. The connecting frame 27 pushes the movable plate 23 to move and compresses the second elastic member 24 through the support rod 26. When the power is suddenly cut off due to fire or other reasons, the control component 37 will synchronously disconnect the connection between the worm gear 9 and the reduction shaft 4, so that the worm gear 9 and the reduction shaft 4 are in a free rotation state. At this time, under the action of the second elastic member 24, the movable plate 23 will be pushed to reset and the output shaft 3 will be driven to rotate in the opposite direction to complete the closing of the door. Of course, the power can also be cut off actively, and the automatic closing of the door can be completed through the second elastic member 24. The door opening mode can be freely adjusted to manual or automatic, thereby improving the flexibility of the equipment. In addition, the door can be automatically closed in the event of fire or emergency power outage, thereby improving the safety of the equipment.

[0030] In an example of the present embodiment, the rotating power member 7 is a motor, and of course it can also be other components that can output rotating power, such as a hydraulic motor. The motor can drive the output shaft 3 to actively rotate to achieve automatic opening of the door. The second elastic member 24 is a second spring, and of course it can also be other elastic components such as an elastic ball. The compression deformation of the second spring provides thrust for closing the door.

[0031] like Figure 4 , Figure 5As shown, a manual-automatic door closer provided by the present invention, the control component 37 includes an electromagnet 11, the electromagnet 11 is fixedly installed in the housing 2 through a pillar 10, the electromagnet 11 is an annular structure and is coaxially arranged with the reduction shaft 4, a slide groove 12 is provided on the reduction shaft 4 and a permanent magnet 13 used in conjunction with the electromagnet 11 is slidably installed on the slide groove 12, a non-magnetic material is provided at the position where the permanent magnet 13 contacts the reduction shaft 4, a friction ring 14 is rotatably installed on the surface of the permanent magnet 13 away from the electromagnet 11, the friction ring 14 is used in conjunction with a friction plate 15 fixedly installed on the worm gear 9, and the friction ring 14 and the friction plate 15 are both coaxially arranged with the reduction shaft 4.

[0032] In actual application of this embodiment, after the electromagnet 11 is energized, its surface magnetic poles close to the permanent magnet 13 are the same, and the permanent magnet 13 moves upward under the action of magnetic force, so that the friction ring 14 and the friction plate 15 collide with each other. At this time, the worm wheel 9 rotates to drive the permanent magnet 13 to rotate through friction. Since the cross-section of the slide groove 12 is a non-circular structure, the permanent magnet 13 can drive the reduction shaft 4 to rotate synchronously. When the power is off, the electromagnet 11 no longer applies a repulsive magnetic force to the permanent magnet 13, and then the permanent magnet 13 moves downward under the action of gravity to make the friction ring 14 separate from the friction plate 15. At this time, the worm wheel 9 and the reduction shaft 4 are turned into a freely rotating connection state, avoiding the situation that the worm wheel 9 and the worm 8 are self-locking and the output shaft 3 cannot rotate, thereby realizing the conversion of the output shaft 3 from automatic rotation to manual rotation.

[0033] like Figure 4 , Figure 5 As shown, a manual-automatic door closer provided by the present invention is provided, wherein a first telescopic rod 18 is fixedly installed on the inner bottom surface of the shell 2, the first telescopic rod 18 is perpendicular to the second telescopic rod 22, and a U-shaped limit frame 19 used in conjunction with a movable plate 23 is fixedly installed on the output end of the first telescopic rod 18, a first elastic member 20 is fixedly installed on the bottom surface of the limit frame 19, and one end of the first elastic member 20 away from the limit frame 19 is fixedly connected to the bottom side wall of the shell 2, and the limit frame 19 is connected to the friction ring 14.

[0034] Specifically, the side of the limit frame 19 and the support plate 21 is provided with an inclined structure, and the inclined structure is located at the end of the limit frame 19. The bottom surface of the movable plate 23 is rotatably installed with a rotating rod 25 used in conjunction with the limit frame 19. The diameter of the rotating rod 25 is the same as the thickness of the movable plate 23.

[0035] Specifically, a connecting rod 17 is fixedly mounted on the side of the limiting frame 19 , and a mounting ring 16 is fixedly mounted on one end of the connecting rod 17 away from the limiting frame 19 . The mounting ring 16 is rotatably connected to the friction ring 14 and is coaxially arranged.

[0036] When the embodiment is actually used, in the power-on state, the output shaft 3 is driven to rotate by the rotating power member 7 to complete the door opening. During the door opening process, the output shaft 3 drives the cam 29 to rotate, and the cam 29 drives the connecting frame 27 to move along the guide plate 28 toward the support plate 21 through the connecting column 30. When the connecting frame 27 moves, it pushes the movable plate 23 to move and compress the second elastic member 24 through the support rod 26. When the rotating rod 25 contacts the inclined structure on the limit frame 19, the movable plate 23 continues to move so that the rotating rod 25 pushes the limit frame 19 to move downward and compress the first elastic member 20. When the rotating rod 25 passes over the limit frame 19, the limit frame 19 is reset under the action of the first elastic member 20. The top height of the limit frame 19 after reset is higher than the rotating rod 25 and lower than the lower surface of the movable plate 23. At this time, the door is opened to the set maximum angle. When the door is subsequently closed, the output shaft 3 rotates in the opposite direction to reset the connecting frame 27, and the movable plate 23 maintains its original position under the action of the limiting frame 19, so that the movable plate 23 will not generate additional force on the output shaft 3 during the subsequent rotation of the output shaft 3, thereby reducing the contact pressure between the first reduction gear 5 and the second reduction gear 6, and between the worm 8 and the worm wheel 9, thereby reducing the wear of the equipment and increasing the service life of the equipment, and at the same time avoiding frequent compression and reset of the second elastic member 24, slowing down the fatigue process of the material of the second elastic member 24, reducing the probability of damage to the second elastic member 24, and increasing the service life of the second elastic member 24; When the power is subsequently cut off, the electromagnet 11 no longer applies a repulsive magnetic force to the permanent magnet 13, and the permanent magnet 13 moves downward under the action of gravity. At the same time, under the action of magnetic force, the electromagnet 11 will also generate a downward force on the permanent magnet 13 to ensure that the permanent magnet 13 can move downward. When the permanent magnet 13 moves downward, the limiting frame 19 is driven downward by the mounting ring 16 and the connecting rod 17 to make the top of the limiting frame 19 drop to the set position. At this time, the limiting frame 19 no longer interferes with the movement of the rotating rod 25. Under the action of the second elastic member 24, the movable plate 23 moves until it contacts the support rod 26. After that, the movable plate 23 will push the output shaft 3 to rotate through the support rod 26, the connecting frame 27, the connecting column 30 and the cam 29. The rotation of the output shaft 3 causes the door to close, ensuring that the door can be automatically closed in time when the power is off, avoiding smoke and open flames from passing through when a fire occurs, and improving fire safety.

[0037] In an example of the present invention, the first elastic member 20 is a first spring, and of course, it can also be other elastic members such as an elastic ball. The first spring is compressed and deformed to provide a reset thrust for the limit frame 19 .

[0038] like Figure 7 , Figure 8As shown, a manual-automatic door closer provided by the present invention, a buffer cylinder 31 is fixedly installed on the inner wall of the shell 2, the buffer cylinder 31 is parallel to the guide plate 28, a push plate 34 is slidably installed in the buffer cylinder 31, a slide rod 32 is fixedly installed on the push plate 34, the slide rod 32 extends into the buffer cylinder 31 and a power plate 33 is fixedly installed at one end of the slide rod 32 away from the push plate 34, the power plate 33 is slidably connected to the guide plate 28, a temporary storage cavity 35 is provided at one end of the buffer cylinder 31 away from the power plate 33, and the temporary storage cavity 35 is connected to the buffer cylinder 31 through a through hole 36.

[0039] In actual application of this embodiment, a set volume of buffer oil is added to the buffer cylinder 31. In the initial state, a gap is set between the push plate 34 and the temporary storage chamber 35 and the buffer oil is located between the temporary storage chamber 35 and the push plate 34. The liquid level of the buffer oil is slightly lower than the height of the through hole 36. When the door is closed to a set angle, the connecting frame 27 contacts the power plate 33, and then the door continues to close. At this time, the power plate 33 pushes the push plate 34 to move through the sliding rod 32. When the push plate 34 moves, the space in front of its moving direction is reduced, and the buffer oil accumulates. Eventually, the oil will fill the area of ​​the buffer cylinder 31 on the front side of the push plate 34 and the buffer oil will enter the temporary storage chamber 35 through the through hole 36, thereby achieving buffering when closing the door. When the door is subsequently opened, the connecting frame 27 no longer applies pressure to the power plate 33. At this time, the oil will push the push plate 34 to move and flow out of the temporary storage chamber 35, and buffering can be performed again subsequently.

[0040] like Figure 1-Figure 6 As shown, a method for using a door closer provided by the present invention is applied to the above-mentioned manual-automatic door closer, and comprises the following steps: Step S1: Install the device at a set position through the base plate 1 and connect the output shaft 3 to the door; Step S2: When in use in the power-on state, the control component 37 makes the worm wheel 9 and the reduction shaft 4 rotate synchronously. After the detection device detects a person coming, the rotating power member 7 drives the worm 8 to rotate, and the worm 8 drives the reduction shaft 4 to rotate synchronously through the meshing worm wheel 9, and the reduction shaft 4 drives the output shaft 3 to rotate. The rotation of the output shaft 3 can drive the door to open. After the person passes, the rotating power member 7 rotates in the opposite direction to complete the closing of the door; Step S3: When the power is on, the output shaft 3 rotates to open the door, driving the cam 29 to rotate. The cam 29 drives the connecting frame 27 to move along the guide plate 28 toward the support plate 21 through the connecting column 30. The connecting frame 27 pushes the movable plate 23 to move and compresses the second elastic member 24 through the support rod 26. When the power is suddenly cut off due to fire or other reasons, the control component 37 will synchronously disconnect the connection between the worm gear 9 and the reduction shaft 4, so that the worm gear 9 and the reduction shaft 4 are in a free rotation state. At this time, under the action of the second elastic member 24, the movable plate 23 will be pushed to reset and the output shaft 3 will be driven to rotate in the opposite direction to complete the closing of the door.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0042] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A manual-automatic door closer, comprising a base plate (1) and a housing (2), characterized in that: The housing (2) is fixedly mounted on the bottom plate (1), an output shaft (3) is rotatably mounted in the housing (2), one end of the output shaft (3) extends out of the housing (2), a reduction shaft (4) parallel to the output shaft (3) is rotatably mounted in the housing (2), the reduction shaft (4) is rotatably connected to the output shaft (3), a rotating power member (7) is fixedly mounted in the housing (2), a worm (8) is fixedly mounted on the output end of the rotating power member (7), the worm (8) and the reduction shaft (4) are skewed and perpendicular, and the worm (8) is meshed with a worm wheel (9) rotatably mounted on the reduction shaft (4), and a control component (37) for controlling the worm wheel (9) to rotate synchronously with the reduction shaft (4) is provided in the housing (2); A cam (29) is fixedly mounted on the output shaft (3); a connecting column (30) is fixedly mounted on one end of the cam (29) away from the output shaft (3); the connecting column (30) is connected to a connecting frame (27) slidably mounted in the housing (2); a support rod (26) is fixedly mounted on one side of the connecting frame (27); a support plate (21) is provided on the side wall of the housing (2); a second telescopic rod (22) extending into the housing (2) is fixedly mounted on the support plate (21); a moving plate (23) is fixedly mounted on the end of the second telescopic rod (22) away from the supporting plate (21); a second elastic member (24) distributed around the second telescopic rod (22) is fixedly mounted on the moving plate (23); an end of the second elastic member (24) away from the moving plate (23) is fixedly connected to the supporting plate (21); the moving plate (23) contacts the end of the support rod (26).

2. The manual-automatic door closer according to claim 1, characterized in that: A first reduction gear (5) is fixedly mounted on the reduction shaft (4), and the first reduction gear (5) is meshed with a second reduction gear (6) fixedly mounted on the output shaft (3).

3. The manual-automatic door closer according to claim 1, characterized in that: A guide plate (28) is fixedly mounted in the housing (2), the guide plate (28) is parallel to the worm (8), and a connecting frame (27) is slidably mounted on the guide plate (28), and a connecting column (30) is slidably located in the connecting frame (27).

4. The manual-automatic door closer according to claim 1, characterized in that: The control component (37) comprises an electromagnet (11), the electromagnet (11) is fixedly mounted in the housing (2) via a support (10), the electromagnet (11) is annular in structure and is coaxially arranged with the reduction shaft (4), a slide groove (12) is provided on the reduction shaft (4), and a permanent magnet (13) used in conjunction with the electromagnet (11) is slidably mounted on the slide groove (12), a non-magnetic material is arranged at a position where the permanent magnet (13) contacts the reduction shaft (4), a friction ring (14) is rotatably mounted on a surface of the permanent magnet (13) away from the electromagnet (11), the friction ring (14) is used in conjunction with a friction plate (15) fixedly mounted on the worm gear (9), and both the friction ring (14) and the friction plate (15) are coaxially arranged with the reduction shaft (4).

5. The manual-automatic door closer according to claim 1, characterized in that: A first telescopic rod (18) is fixedly mounted on the inner bottom surface of the housing (2), the first telescopic rod (18) is perpendicular to the second telescopic rod (22), and a U-shaped limit frame (19) used in conjunction with a movable plate (23) is fixedly mounted on the output end of the first telescopic rod (18), a first elastic member (20) is fixedly mounted on the bottom surface of the limit frame (19), an end of the first elastic member (20) away from the limit frame (19) is fixedly connected to the bottom side wall of the housing (2), and the limit frame (19) is connected to the friction ring (14).

6. The manual-automatic door closer according to claim 5, characterized in that: The side surface of the support plate (21) of the limiting frame (19) is provided with an inclined surface structure, the inclined surface structure is located at the end of the limiting frame (19), and a rotating rod (25) used in conjunction with the limiting frame (19) is rotatably mounted on the bottom surface of the movable plate (23), and the diameter of the rotating rod (25) is the same as the thickness of the movable plate (23).

7. The manual-automatic door closer according to claim 6, characterized in that: A connecting rod (17) is fixedly mounted on the side of the limiting frame (19); a mounting ring (16) is fixedly mounted on one end of the connecting rod (17) away from the limiting frame (19); the mounting ring (16) is rotatably connected to the friction ring (14) and is coaxially arranged.

8. The manual-automatic door closer according to claim 3, characterized in that: A buffer cylinder (31) is fixedly mounted on the inner wall of the housing (2). The buffer cylinder (31) is parallel to the guide plate (28). A push plate (34) is slidably mounted in the buffer cylinder (31). A slide rod (32) is fixedly mounted on the push plate (34). The slide rod (32) extends into the buffer cylinder (31). A power plate (33) is fixedly mounted on one end of the slide rod (32) away from the push plate (34). The power plate (33) is slidably connected to the guide plate (28). A temporary storage cavity (35) is provided at one end of the buffer cylinder (31) away from the power plate (33). The temporary storage cavity (35) is connected to the buffer cylinder (31) via a through hole (36).

9. A method for using a door closer, characterized in that: A manual-automatic door closer as claimed in any one of claims 1 to 8, comprising the following steps: Step S1: Install the device at a set position through the base plate (1) and connect the output shaft (3) to the door; Step S2: When the device is in use under the power-on state, the control component (37) causes the worm wheel (9) and the reduction shaft (4) to rotate synchronously. After the detection device detects a person coming, the rotating power member (7) drives the worm (8) to rotate. The worm (8) drives the reduction shaft (4) to rotate synchronously through the meshing worm wheel (9). The reduction shaft (4) drives the output shaft (3) to rotate. The rotation of the output shaft (3) drives the door to open. After the person passes, the rotating power member (7) rotates in the opposite direction to complete the closing of the door. Step S3: When the power is on, the output shaft (3) rotates to open the door, driving the cam (29) to rotate. The cam (29) drives the connecting frame (27) to move along the guide plate (28) toward the support plate (21) through the connecting column (30). The connecting frame (27) pushes the movable plate (23) to move and compresses the second elastic member (24) through the support rod (26). When the power is suddenly cut off due to fire or other reasons, the control component (37) will synchronously disconnect the connection between the worm gear (9) and the reduction shaft (4), so that the worm gear (9) and the reduction shaft (4) are in a free rotation state. At this time, under the action of the second elastic member (24), the movable plate (23) will be pushed to reset and the output shaft (3) will be driven to rotate in the opposite direction to complete the closing of the door.

Images