Automatic door opener with torque sensing and automatic clutch

Abstract

The present invention belongs to the field of smart home technology, and discloses an automatic door opener with torque sensing and automatic clutch, including a clutch output gear, an upper clutch plate movably sleeved in the middle of the clutch output gear, a clutch fixing ring movably sleeved in the upper side of the middle of the upper clutch plate, an electromagnetic coil fixedly installed on the top of the lower end of the upper clutch plate, a tower spring fixedly connected to the bottom of the upper clutch plate, a lower clutch plate fixedly connected to the lower end of the tower spring, a permanent magnet movably sleeved in the lower end of the lower clutch plate, and a clutch input gear fixedly sleeved in the inner part of the lower clutch plate. The present invention realizes the anti-pinch function by providing a pressure shaft, an elastic body, a resistance strain gauge, etc., and by providing an upper clutch plate, an electromagnetic coil, a tower spring and a lower clutch plate, the clutch output gear can rotate freely at this time, and then the connecting rod mechanism can rotate freely, which has the advantage of anti-pinch injury.

Description

Technical Field

[0001] The invention belongs to the technical field of smart home, in particular to an automatic door opener with torque sensing and automatic clutch. Background Art

[0002] With the development of technology, smart locks have been widely used, but there are currently two main types of automatic door closers on the market: one is the horizontal track type which can only be used for sliding doors with tracks, and the other is the spring or hydraulic type which is used for hinged doors, but can only play a one-way action of closing or opening the door and neither has anti-pinch functions.

[0003] In addition, the output shaft of the reduction motors on the market cannot move freely or requires a large torque to rotate due to the influence of the reduction mechanism. If the reduction ratio is high, it cannot rotate freely and the output shaft can only be driven by the motor through the reduction gear, which reduces the service life of the gear. Summary of the invention

[0004] The purpose of the present invention is to solve the above problems. The present invention provides an automatic door opener with torque sensing and automatic clutch, which has the advantages of anti-pinch and extended gear life.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: an automatic door opener with torque sensing and automatic clutch, comprising a clutch output gear, an upper clutch plate is movably sleeved in the middle of the clutch output gear, a clutch fixing ring is movably sleeved in the upper side of the middle of the upper clutch plate, an electromagnetic coil is fixedly installed on the top of the lower end of the upper clutch plate, a tower spring is fixedly connected to the bottom of the upper clutch plate, a lower clutch plate is fixedly connected to the lower end of the tower spring, a permanent magnet is movably sleeved inside the lower end of the lower clutch plate, and a clutch input gear is fixedly sleeved inside the lower clutch plate.

[0006] As a preferred technical solution of the present invention, the outer side of the clutch output gear is meshed with a torque sensing mechanism input gear, the lower end of the torque sensing mechanism input gear is fixedly connected with a pressure shaft, the inner side of the pressure shaft is fixedly connected with an elastic body, the middle part of the outer side of the elastic body is fixedly connected with a resistance strain gauge, the lower end of the outer side of the elastic body is fixedly connected with the torque sensing mechanism output shaft, the middle part of the torque sensing mechanism output shaft is movably sleeved with a slip ring, the lower end of the torque sensing mechanism output shaft is movably sleeved with a sleeve ring, the bottom of the torque sensing mechanism output shaft is fixedly sleeved with a connecting rod mechanism, the bottom of the lower clutch plate is fixedly installed with a bearing platform, the upper part of the left end of the bearing platform is fixedly installed with a convex table, the left side of the clutch input gear is meshed with a reduction mechanism, the left side of the reduction mechanism is meshed with a reduction motor, the bottom of the reduction mechanism is movably sleeved with a side cover body, the top of the side cover body is fixedly connected with an upper cover body, the rear side of the side cover body is fixedly connected with a wall fixing plate, and the top of the upper cover body is fixedly installed with a top cover box.

[0007] As a preferred technical solution of the present invention, the upper end of the output shaft of the torque sensing mechanism is in the shape of a semi-cylinder, the bottom of the semi-cylinder is a thin cylinder, the middle and bottom of the output shaft of the torque sensing mechanism are cylinders and D-shaped columns, the height of the thin cylinder is one twentieth of the height of the semi-cylinder, the inner side of the semi-cylinder is fixedly connected to the elastomer, the outer side of the middle cylinder is sleeved with a slip ring, the outer side of the D-shaped column is fixedly sleeved with a connecting rod mechanism and the bottom of the D-shaped column can resist the lower surface of the connecting rod mechanism.

[0008] As a preferred technical solution of the present invention, a rectangular notch is provided at the upper end of the elastomer, and both sides of the upper end of the elastomer are circular arc heads. Three circular holes are provided at the lower end of the elastomer. The notch allows the pressure shaft to rotate smoothly and leaves a certain elastic margin space when the device is running. The elastomer is fixedly connected to the output shaft of the torque sensing mechanism through the three circular holes and the fixed column.

[0009] As a preferred technical solution of the present invention, the lower end of the upper clutch plate is in the shape of a low cylinder with a groove inside the cylinder, six upper limit positioning bodies are evenly distributed on the bottom of the upper clutch plate, a high cylinder with an internal penetration is arranged in the middle of the upper clutch plate, the upper end of the upper clutch plate is an I-shaped D-type head with an I-shaped cross-section, the height of the low cylinder is half of the height of the high cylinder, the upper surface of the groove is flat for placing the electromagnetic coil, the through groove inside the high cylinder is D-shaped, which can be adapted to the center of the lower clutch plate and the clutch input gear, the D-type head is adapted to the clutch output gear, and the six upper limit positioning bodies form upper limit positioning grooves with each other, which are adapted to the inside of the lower clutch plate.

[0010] As a preferred technical solution of the present invention, the shape of the lower clutch plate is a cylinder, and a circular groove is provided inside the lower clutch plate, and six lower limit columns are evenly distributed on the upper surface of the groove. A connected D-shaped column is provided at the center of the interior of the lower clutch plate, and the outer side of the D-shaped column can be adapted to the center of the upper clutch plate, and a through D-shaped groove is provided inside the D-shaped column and can be adapted to the center of the clutch input gear. The six lower limit columns are consistent in size with the six upper limit columns of the upper clutch plate and form a lower limit groove, but their evenly distributed positions are staggered, and the limit grooves formed by mutual engagement, when the lower clutch plate and the upper clutch plate are not engaged, the top of the clutch input gear is flush with the top of the lower clutch plate.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] 1. The present invention realizes the anti-pinch function by providing a pressure shaft, an elastic body and a resistance strain gauge, etc. The pressure shaft is provided to press on the elastic body to drive the output shaft of the torque sensing mechanism to rotate, and the resistance of the resistance strain gauge can be changed. A zero to five volt-ampere voltage is output through a Wheatstone bridge and a voltage-stabilizing amplifier circuit, and then converted into torque through a program. By providing an upper clutch plate, an electromagnetic coil, a tower spring and a lower clutch plate, the program detects the torque change, and the electromagnetic coil can be controlled to demagnetize. The tower spring releases elastic potential energy to bounce off the lower clutch plate, and the upper clutch plate and the lower clutch plate are separated. In summary, at this time, the clutch output gear can rotate freely, and then the connecting rod mechanism can rotate freely, which has the advantage of preventing pinching.

[0013] 2. The present invention is provided with an upper clutch plate, an electromagnetic coil, a tower spring and a lower clutch plate. The electromagnetic coil is demagnetized, and the tower spring is stretched to bounce the lower clutch plate open, or the electromagnetic coil can be energized in the opposite direction, so that the upper clutch plate and the lower clutch plate are quickly separated under the repulsive force of the magnetic field, and then demagnetized. The clutch input gear is inside the lower clutch plate. At this time, the clutch input gear and the upper clutch plate have no force relationship. When the reduction motor drives the reduction mechanism and the clutch input gear to rotate, and when an external force drives the connecting rod mechanism to rotate and then drives the clutch output gear to rotate, there will be no influence on each other. In summary, at this time, there will be no rotational conflict between the gears to cause wear, which has the advantage of extending the life of the gears. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of the present invention without a cover;

[0015] Figure 2 This is a schematic diagram of the appearance of the closed cover of the present invention;

[0016] Figure 3 It is a cross-sectional schematic diagram of the clutch output gear, upper clutch plate, clutch fixing ring, electromagnetic coil, tower spring, lower clutch plate and permanent magnet of the present invention;

[0017] Figure 4 It is a connection diagram of the torque sensing mechanism input gear, pressure shaft, resistance strain gauge, elastic body, torque sensing mechanism output shaft, slip ring and sleeve ring of the present invention;

[0018] Figure 5 This is a schematic diagram of the appearance of the lower clutch plate of the present invention;

[0019] Figure 6 This is a schematic diagram of the appearance of the upper clutch plate of the present invention;

[0020] Figure 7 This is a schematic diagram of the appearance of the clutch input gear of the present invention;

[0021] Figure 8 This is a schematic diagram of the appearance of the clutch output gear of the present invention;

[0022] Fig. 9 Schematic diagram of the sensor circuit of the present invention.

[0023] In the figure: 1. clutch output gear; 2. upper clutch plate; 3. clutch fixing ring; 4. electromagnetic coil; 5. reduction mechanism; 6. tower spring; 7. lower clutch plate; 8. permanent magnet; 9. clutch input gear; 10. reduction motor; 11. embossing table; 12. bearing table; 13. torque sensing mechanism input gear; 14. pressure shaft; 15. resistance strain gauge; 16. elastic body; 17. torque sensing mechanism output shaft; 18. slip ring; 19. sleeve ring; 20. connecting rod mechanism; 21. upper cover body; 22. side cover body; 23. top cover box; 24. wall fixing plate. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] like Figures 1 to 9 As shown, the present invention provides an automatic door opener with torque sensing and automatic clutch, including a clutch output gear 1, an upper clutch plate 2 is movably sleeved in the middle of the clutch output gear 1, a clutch fixing ring 3 is movably sleeved in the upper side of the middle of the upper clutch plate 2, an electromagnetic coil 4 is fixedly installed on the top of the lower end of the upper clutch plate 2, a tower spring 6 is fixedly connected to the bottom of the upper clutch plate 2, a lower clutch plate 7 is fixedly connected to the lower end of the tower spring 6, a permanent magnet 8 is movably sleeved inside the lower end of the lower clutch plate 7, and a clutch input gear 9 is fixedly sleeved inside the lower clutch plate 7.

[0026] Among them, the outer side of the clutch output gear 1 is meshed with a torque sensing mechanism input gear 13, the lower end of the torque sensing mechanism input gear 13 is fixedly connected to a pressure shaft 14, the inner side of the pressure shaft 14 is fixedly connected to an elastic body 16, the middle part of the outer side of the elastic body 16 is fixedly connected to a resistance strain gauge 15, the lower end of the outer side of the elastic body 16 is fixedly connected to a torque sensing mechanism output shaft 17, the middle part of the torque sensing mechanism output shaft 17 is movably sleeved with a slip ring 18, the lower end of the torque sensing mechanism output shaft 17 is movably sleeved with a sleeve ring 19, and the torque sensing mechanism output shaft 17 is movably sleeved with a sleeve ring 19. The bottom of the mechanism output shaft 17 is fixedly sleeved with a connecting rod mechanism 20, the bottom of the lower clutch plate 7 is fixedly installed with a bearing platform 12, the upper part of the left end of the bearing platform 12 is fixedly installed with a convex platform 11, the left side of the clutch input gear 9 is meshed with a reduction mechanism 5, the left side of the reduction mechanism 5 is meshed with a reduction motor 10, the bottom of the reduction mechanism 5 is movably sleeved with a side cover body 22, the top of the side cover body 22 is fixedly connected to an upper cover body 21, the rear side of the side cover body 22 is fixedly connected to a wall fixing piece 24, and the top of the upper cover body 21 is fixedly installed with a top cover box 23.

[0027] Among them, the upper end of the torque sensing mechanism output shaft 17 is a semi-cylinder, the bottom of the semi-cylinder is a thin cylinder, the middle and bottom of the torque sensing mechanism output shaft 17 are cylinders and D-shaped columns, the height of the thin cylinder is one twentieth of the height of the semi-cylinder, the inner side of the semi-cylinder is fixedly connected to the elastomer 16, the outer side of the middle cylinder is sleeved with the slip ring 18, the outer side of the D-shaped column is fixedly sleeved with the connecting rod mechanism 20 and the bottom of the D-shaped column can resist the lower surface of the connecting rod mechanism 20.

[0028] Among them, a rectangular notch is opened at the upper end of the elastic body 16, and the two sides of the upper end of the elastic body 16 are circular arc heads. Three circular holes are opened at the lower end of the elastic body 16. The notch allows the pressure shaft 14 to rotate smoothly and leaves a certain elastic margin space when the device is running. The elastic body 16 is fixedly connected to the output shaft 17 of the torque sensing mechanism through the three circular holes and the fixed columns.

[0029] Among them, the lower end of the upper clutch plate 2 is a low cylinder with a groove inside. Six upper limit positioning bodies are evenly distributed on the bottom of the upper clutch plate 2. A high cylinder with an internal penetration is arranged in the middle of the upper clutch plate 2. The upper end of the upper clutch plate 2 is an I-shaped D-type head. The height of the low cylinder is half of the height of the high cylinder. The upper surface of the groove is flat for placing the electromagnetic coil 4. The through groove inside the high cylinder is D-shaped, which can be adapted to the center of the lower clutch plate 7 and the clutch input gear 9. The D-type head is adapted to the clutch output gear 1. The six upper limit positioning bodies form upper limit grooves with each other, which are adapted to the inside of the lower clutch plate 7.

[0030] Among them, the shape of the lower clutch plate 7 is a cylinder, and a circular groove is opened inside the lower clutch plate 7. Six lower limit columns are evenly distributed on the upper surface of the groove. A connected D-shaped column is set in the center of the lower clutch plate 7. The outer side of the D-shaped column can be adapted to the center of the upper clutch plate 2. A through D-shaped groove is opened inside the D-shaped column and can be adapted to the center of the clutch input gear 9. The six lower limit columns are the same size as the six upper limit columns of the upper clutch plate 2 and form a lower limit groove, but the evenly distributed positions are staggered, and the limit grooves formed by mutual engagement, when the lower clutch plate 7 and the upper clutch plate 2 are not engaged, the top of the clutch input gear 9 is flush with the top of the lower clutch plate 7.

[0031] The working principle and use process of the present invention:

[0032] The electromagnetic coil 4 is turned on. Under the action of the magnetic field of the electromagnetic coil 4 and the permanent magnet 8, the lower clutch plate 7 and the upper clutch plate 2 are engaged with each other, the tower spring 6 contracts, and the reduction motor 10 is started. The reduction motor 10 drives the reduction mechanism 5 to rotate, and the reduction mechanism 5 drives the clutch input gear 9 to rotate. At this time, the upper end of the clutch input gear 9 is inside the upper end of the lower clutch plate 7, and the upper end of the lower clutch plate 7 is inside the upper clutch plate 2. The rotation of the clutch input gear 9 can drive the lower clutch plate 7 and the upper clutch plate 2 to rotate together, and then drive the clutch output gear 1, so that the torque sensing mechanism input gear 13 rotates, the torque sensing mechanism input gear 13 drives the pressure shaft 14 to rotate, the pressure shaft 14 drives the elastic body 16 to rotate and then drives the torque sensing mechanism output shaft 17 to rotate, so that the connecting rod mechanism 20 generates a connecting rod movement, which can open and close the door;

[0033] The resistance strain gauge 15 attached to the elastic body 16 undergoes mechanical deformation due to the elastic body 16, so that the resistance of the resistance strain gauge 15 changes accordingly, and a zero to five volt-ampere voltage is output through the Wheatstone bridge and the voltage-stabilizing amplifier circuit, which is then converted into torque through a program. If the door clamps an object or an external force pushes the door at this time, a change in torque can be detected, and the electromagnetic coil 4 can be controlled by the program to disconnect the upper clutch plate 2 and the lower clutch plate 7, and then the clutch output gear 1 can rotate freely. At this time, the door can be pushed and pulled freely and it can prevent pinching.

[0034] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic door opener with torque sensing and automatic clutch, comprising a clutch output gear (1), characterized in that: The middle part of the clutch output gear (1) is movably sleeved with an upper clutch plate (2), the upper side of the middle part of the upper clutch plate (2) is movably sleeved with a clutch fixing ring (3), the top of the lower end of the upper clutch plate (2) is fixedly mounted with an electromagnetic coil (4), the bottom of the upper clutch plate (2) is fixedly connected with a tower spring (6), the lower end of the tower spring (6) is fixedly connected with a lower clutch plate (7), the lower end of the lower clutch plate (7) is movably sleeved with a permanent magnet (8), and the inner fixed sleeve of the lower clutch plate (7) is fixedly mounted with a permanent magnet (8). The clutch input gear (9) is connected to the clutch output gear (1); the outer side of the clutch output gear (1) is meshed with a torque sensing mechanism input gear (13); the lower end of the torque sensing mechanism input gear (13) is fixedly connected to a pressure shaft (14); the inner side of the pressure shaft (14) is fixedly connected to an elastic body (16); the middle part of the outer side of the elastic body (16) is fixedly connected to a resistance strain gauge (15); the lower end of the outer side of the elastic body (16) is fixedly connected to a torque sensing mechanism output shaft (17); the output shaft (17) of the torque sensing mechanism is fixedly connected to the inner side of the pressure shaft (14); A slip ring (18) is movably sleeved in the middle, a sleeve ring (19) is movably sleeved in the lower end of the torque sensing mechanism output shaft (17), a connecting rod mechanism (20) is fixedly sleeved in the bottom of the torque sensing mechanism output shaft (17), a bearing platform (12) is fixedly mounted on the bottom of the lower clutch plate (7), a convex platform (11) is fixedly mounted on the upper part of the left end of the bearing platform (12), a reduction mechanism (5) is meshed on the left side of the clutch input gear (9), and a reduction motor (10) is meshed on the left side of the reduction mechanism (5). The bottom of the speed reduction mechanism (5) is movably sleeved with a side cover body (22); the top of the side cover body (22) is fixedly connected to an upper cover body (21); the rear side of the side cover body (22) is fixedly connected to a wall fixing plate (24); the top of the upper cover body (21) is fixedly mounted with a top cover box (23); the lower clutch plate (7) is cylindrical in shape; a circular groove is provided inside the lower clutch plate (7); six lower limit posts are evenly distributed on the upper surface of the groove; and a connected D-shaped post is provided at the center of the lower clutch plate (7).

2. The automatic door opener with torque sensing and automatic clutch according to claim 1, characterized in that: The upper end of the torque sensing mechanism output shaft (17) is in the shape of a semi-cylinder, the bottom of the semi-cylinder is a thin cylinder, and the middle and bottom of the torque sensing mechanism output shaft (17) are cylinders and D-shaped columns.

3. The automatic door opener with torque sensing and automatic clutch according to claim 1, characterized in that: The upper end of the elastic body (16) is provided with a rectangular notch, both sides of the upper end of the elastic body (16) are circular arc heads, and the lower end of the elastic body (16) is provided with three circular holes.

4. The automatic door opener with torque sensing and automatic clutch according to claim 1, characterized in that: The lower end of the upper clutch plate (2) is in the shape of a low cylinder, the cylinder has a groove inside, six upper limit positioning bodies are evenly distributed on the bottom of the upper clutch plate (2), a high cylinder penetrating the interior is arranged in the middle of the upper clutch plate (2), and the upper end of the upper clutch plate (2) is an I-shaped D-shaped head in cross section.

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