KR102156623B1 - Geard motor assembly for automatic door and automatic door using thereof - Google Patents

Abstract

The present invention relates to a geared motor assembly for an automatic door that can be downsized. The geared motor assembly for an automatic door includes: a motor that rotates and generates a driving force; a reduction gear part that receives the driving force of the motor and adjusts the rotation speed; a gearbox that accommodates the reduction gear part therein and couples the motor and the reduction gear part; a drive pulley provided on one side of the motor in an upper part of the gearbox to receive the driving force from the reduction gear part and transfer the driving force to a belt, wherein the motor is provided as an outer rotor type BLDC motor.

Description

Geared motor assembly for automatic door and automatic door using it {GEARD MOTOR ASSEMBLY FOR AUTOMATIC DOOR AND AUTOMATIC DOOR USING THEREOF}

The present invention relates to a geared motor assembly and an automatic door using the same, and more particularly, to a geared motor assembly for an automatic door capable of miniaturizing a size and preventing jamming accidents, and an automatic door using the same.

In general, automatic doors are installed at entrances and exits of buildings, such as hotels and buildings, where many people enter.

The automatic door opens or closes the door automatically by actuating the motor by hooking the door installed to be slidable by a guide rail installed on the frame to a drive belt that rotates by a motor.

In general, a geared motor that drives a drive belt is coupled to an automatic door.

1 is a perspective view showing the configuration of a conventional geared motor 10. As shown, the conventional geared motor 10 includes a direct current motor 11 that is driven by receiving a DC power of 24V, and a drive pulley 13 that transmits the drive of the DC motor 11 to a drive belt. , It includes a gearbox 15 accommodating a reduction gear for transmitting the drive of the DC motor 11 to the drive pulley (13).

The DC motor 11 provided in the conventional geared motor 10 has a large starting torque, a rotational characteristic linearly proportional to an applied voltage, and an output torque linearly proportional to an input current, so rotation control is easy, and the price is low. As it has inexpensive characteristics, it is widely used as a control motor. However, the DC motor 11 has a disadvantage of being relatively bulky.

In addition, in the conventional geared motor 10, a worm gear is used to change the power transmission path of the DC motor 11 to a right angle, but due to the characteristics of the worm gear, it takes up a lot of installation space and has a disadvantage that the power transmission efficiency is not large.

In addition, since the conventional geared motor 10 has a structure in which a number of parts are installed in the gearbox 15, the size of the gearbox 15 increases by that amount, and accordingly, the overall volume increases, thereby increasing the overall length and increasing the height. there is a problem.

Meanwhile, in the conventional automatic door, if an obstacle such as a person or object is caught in the process of closing the door, the door is opened again after contact with the closing door. Accordingly, when a child or an elderly person gets caught in the door, there are cases where they feel pain or startled by feeling great pressure on the part that touches the door.

An object of the present invention is to solve the above-described problem, and to provide a geared motor assembly for an automatic door capable of miniaturizing the size and an automatic door using the same.

Another object of the present invention is to provide a geared motor assembly for an automatic door and an automatic door using the same, which detects the obstacle in advance when there is an obstacle when the door is closed and the door is opened to prevent the door from contacting the obstacle.

The above objects and various advantages of the present invention will become more apparent from the preferred embodiments of the present invention by those skilled in the art.

The object of the present invention can be achieved by a geared motor assembly for an automatic door that provides a driving force so that the door can be automatically opened and closed. The geared motor assembly of the present invention includes a motor that rotates and generates a driving force; A reduction gear unit that receives the driving force of the motor and adjusts the rotation speed; A gearbox receiving the reduction gear unit therein and coupling the motor and the reduction gear unit; And a driving pulley provided on one side of the motor on the top of the gearbox to receive driving force from the reduction gear unit and transmit it to the belt, wherein the motor is provided as an abduction type BLDC motor.

According to an embodiment, the gearbox has a motor seating surface on which the motor is seated on an upper surface, and a pulley seating surface on which the driving pulley is seated on one side of the motor seating surface, and the reduction gear unit includes the motor A first gear shaft that is accommodated in the gearbox perpendicular to the seating surface and rotates forward and backward in connection with the driving of the motor, a third gear shaft that is accommodated in the gearbox perpendicular to the pulley seating surface, and the third gear shaft. A first reduction gear including a second gear shaft that is rotatably provided in parallel between the first gear shaft and the third gear shaft and is provided on the first gear shaft; A second reduction gear coupled to the second gear shaft and rotating in engagement with the first reduction gear and having a larger diameter than the first reduction gear; A third reduction gear provided on the second gear shaft under the second reduction gear and having a diameter smaller than that of the second reduction gear; It may include a fourth reduction gear that is provided on the third gear shaft, rotates by meshing with the third reduction gear, and has a larger diameter than the third reduction gear.

On the other hand, the object of the present invention can be achieved by the automatic door. The automatic door of the present invention includes a door frame provided horizontally on an upper portion of the entrance; A motor assembly provided on one side of the door frame; A driven pulley provided on the door frame at a position opposite to the driving pulley of the motor assembly; A belt coupled to the driving pulley and the driven pulley; A door provided below the door frame and having a belt coupling ring provided thereon fixed to a region of the belt; A proximity sensor provided on a side of the door closing direction to detect an obstacle positioned in front of the door closing direction; and a control unit controlling driving of the geared motor assembly to open and close the door, wherein the When the proximity sensor detects an obstacle while the motor is being driven in the direction in which the door is closed, the controller stops driving the motor and drives the motor in the direction in which the door is opened to control the door so that it does not contact the obstacle. It features.

The geared motor assembly for an automatic door and the automatic door using the same according to the present invention have the advantage of being able to reduce the overall size by using an abduction type BLDC motor.

In addition, a proximity sensor is provided on one side of the door, so that when there is an obstacle when the door is closed, the door is opened in advance without touching the obstacle. Accordingly, it is possible to prevent an accident in which a person is caught in the automatic door, and a problem in which the person is surprised or injured the person because the person does not touch the door can be prevented.

1 is a perspective view showing the configuration of a conventional geared motor,
2 is a perspective view showing the configuration of an automatic door to which a geared motor according to the present invention is applied,
3 is a perspective view showing the configuration of a geared motor according to the present invention,
4 is an exploded perspective view showing the configuration of a geared motor according to the present invention.

In order to fully understand the present invention, preferred embodiments of the present invention will be described with reference to the accompanying drawings. The embodiments of the present invention may be modified in various forms, and the scope of the present invention should not be construed as being limited to the embodiments described in detail below. This embodiment is provided to more completely explain the present invention to those with average knowledge in the art. Accordingly, the shape of the element in the drawings may be exaggerated to emphasize a clearer description. It should be noted that in each drawing, the same member may be indicated by the same reference numeral. Detailed descriptions of known functions and configurations that are determined to unnecessarily obscure the subject matter of the present invention will be omitted.

2 is a perspective view showing the configuration of the automatic door 1 according to the present invention. As shown, the automatic door 1 according to the present invention is coupled to the door frame 200 and the door 300 provided under the door frame 200, and the door 300 is automatically A motor assembly 100 that forms a driving force so that it can be moved, an access sensor 400 provided in the door frame 200 to detect the approach of a person entering, and a door 300 coupled to the inside of the door 300 A proximity sensor 500 that detects in advance whether there is an obstacle in the path to which) is closed, and a control unit (not shown) that controls the driving of the motor assembly 100 according to the detection results of the access detection sensor 400 and the proximity sensor 500 ).

As shown, the automatic door 1 is installed at the entrance of the building. Although only one door 300 is shown in FIG. 2, this is only an example, and the door 300 may be installed on both sides depending on the size of the entrance.

The door 300 is formed to correspond to the size of the entrance and is opened and closed by the driving force of the motor assembly 100. A belt coupling ring 310 is formed to protrude toward the door frame 200 on the upper part of the door 300, and a fastening member 320 fixed to the belt 220 is provided on the belt coupling ring 310.

The door frame 200 is provided in the horizontal direction above the entrance to move the door 300 and guide the door 300 to open and close the entrance. The door frame 200 is provided with a motor assembly 100 and electric means for forming a driving force so that the door 300 can be moved. The electric means is coupled to the driven pulley 210 provided in a direction opposite to the driving pulley 140 of the motor assembly 100, the driving pulley 140 and the driven pulley 210, and the belt coupling ring of the door 300 It includes 310 and a belt 220 to be fixed.

The motor assembly 100 is provided on one side of the door frame 200 to provide a driving force so that the belt 220 moves forward and backward.

Figure 3 is a perspective view showing the configuration of the motor assembly 100 of the present invention, Figure 4 is an exploded perspective view showing the configuration of the motor assembly 100 in an exploded manner.

As shown, the motor assembly 100 includes a motor 110, a driving pulley 140 disposed to be spaced apart from the motor 110, a gearbox 120 provided under the motor 110, and a gearbox. (120) It includes a reduction gear unit 130, which is provided inside and transmits the speed of the motor 110 to the driving pulley 140 by decelerating.

Here, the motor 110 used in the motor assembly 100 of the present invention is provided as an abduction type BLDC motor. The abduction type BLDC motor has the advantage of excellent reliability and long lifespan since there is no brush and commutator compared to the conventional DC motor (DC motor), so there is no need for regular maintenance. In addition, since there are no brushes and commutators, miniaturization is possible, thereby reducing the overall length and height. Accordingly, the height of the geared motor 10 shown in FIG. 1 is 75 mm, whereas the height of the motor assembly 100 of the present invention can be reduced to 60 mm.

In addition, the abduction type BLDC motor has a large outer diameter of the rotor compared to the withdrawal type motor, so that the moment of inertia is large, and it is suitable for high speed use. Accordingly, there is an advantage in that the opening and closing speed of the door 300 can be increased.

The gearbox 120 couples the motor 110, the reduction gear unit 130, and the driving pulley 140 to each other, and enables a thin design. A motor seating surface 121 on which the motor 110 is seated and a pulley seating surface 123 on which the driving pulley 140 are seated are respectively provided on the upper surface of the gearbox 120.

A box cover 125 is coupled to the lower portion of the gearbox 120 to support the respective gear shafts 131, 134, and 137 of the reduction gear unit 130 to be rotated. Both sides of the gearbox 120 are provided with a first bracket coupling portion 122 and a second bracket coupling portion 124 to which the bracket 150 is coupled.

The bracket 150 for fixing the gearbox 120 to the door frame 200 is coupled to the first bracket fitting 122 and the second bracket fitting 124 as shown in FIG. 2. The bracket 150 fixes the gear box 120 to the door frame 200 using a fastening member such as a bolt.

The reduction gear unit 130 reduces the rotational speed of the motor 110 and increases the output and transmits it to the driving pulley 140. The reduction gear unit 130 includes a first gear shaft 131 coupled to the motor 110 and rotated, a third gear shaft 137 coupled to the driving pulley 140, a first gear shaft 131 and a It includes a second gear shaft 134 provided between the three gear shafts 137.

The conventional geared motor 10 shown in FIG. 1 transmits power using a conventional worm gear. In this case, due to the characteristics of the worm gear, space is required in both the horizontal direction and the vertical direction, so that it is difficult to thin the gearbox.

Accordingly, the reduction gear unit 130 of the present invention is designed to reduce the thickness of the entire gear box 120 by using gear shafts arranged parallel in the vertical direction.

The first gear shaft 131 is provided with a first reduction gear 132 and first bearings 133 and 133a, and a second reduction gear 135 and a third reduction gear 135a on the second gear shaft 134 And second bearings 136 and 136a are provided, and a fourth reduction gear 138 and third bearings 139 and 139a are provided on the third gear shaft 137.

The second reduction gear 135 is provided to have a larger diameter than the first reduction gear 132 to reduce the first reduction. The third reduction gear 135a is coupled with the second reduction gear 135 to the second gear shaft 134 and rotates in engagement with the fourth reduction gear 138. The fourth reduction gear 138 is provided to have a diameter larger than that of the third reduction gear 135a to reduce the secondary speed.

By such a reduction gear train, the reduction gear unit 130 reduces the speed of the motor 110 at a ratio of 1:12 and transmits it to the driving pulley 140. The reduction gear unit 130 is only an example, and the speed may be further reduced by increasing the number of gear shafts or by further increasing the reduction gear.

On the other hand, the bearings (133, 133a, 136, 136a, 139, 139a) coupled to the top and bottom of each gear shaft (131, 134, 137) support each gear shaft (131, 134, 137) in the gearbox 120 so that it can rotate smoothly.

The driving pulley 140 is rotatably coupled to the pulley seating surface 123 of the gearbox 120. The driving pulley 140 is coupled to the third gear shaft 137 and rotates in conjunction with the forward and reverse rotation of the motor 110. A shaft insertion hole 141 into which the third gear shaft 137 is inserted is formed in the center region of the driving pulley 140.

A belt 220 is coupled to the outer periphery of the driving pulley 140 as shown in FIG. 2. The belt 220 is coupled between the driving pulley 140 and the driven pulley 210 and rotates in conjunction with the rotation direction of the driving pulley 140.

One area of the belt 220 is fixed to the belt coupling ring 310 of the door 300 by a fastening member 320. Accordingly, the movement of the belt 220 is transmitted to the door 300 so that the door 300 is automatically moved and the entrance is opened and closed.

The door frame 200 is provided with an access detection sensor 400 that detects the entry of a person entering. The entrance detection sensor 400 detects that a person entering near the door 300 approaches. The entrance sensor 400 may be provided in various known forms, such as a motion sensor or a heat sensor. In some cases, the access detection sensor 400 may be separately provided in front of the entrance in the form of authenticating an access card, a fingerprint, and a password.

Meanwhile, a proximity sensor 500 is provided on one side of the door 300, that is, a side in the direction in which the door 300 is closed. When the door 300 is closed, the proximity sensor 500 serves to detect in advance whether there is an obstacle in the entrance in the direction in which the door 300 is closed.

The proximity sensor 500 applies a detection signal to a controller (not shown) when there is an obstacle within a preset detection distance.

When a detection signal is transmitted from the proximity sensor 500, the control unit (not shown) stops driving the motor 110 that has been driven in the closing direction and restarts the motor 110 in the direction in which the door 300 opens. The control unit (not shown) drives the motor 110 until the door 300 is completely open, and the direction in which the door 300 is closed when detection signals are not transmitted from both the proximity sensor 500 and the entrance sensor 400 It drives the motor 110.

Under the control of the proximity sensor 500 and a controller (not shown), even if the door is closed in a state where there is an obstacle such as a person entering or an object in the automatic door 1, the door is opened in advance without direct contact with the door. Accordingly, it is possible to solve the conventional problem in which the door touches the body of the person and the person is surprised or injured the body.

The assembly process and the use process of the automatic door 1 according to the present invention having such a configuration will be described with reference to FIGS. 2 to 4.

As shown in Figure 2, the door frame 200 is installed on the upper part of the entrance. Then, the motor assembly 100 is fixed to one side of the door frame 200. The motor assembly 100 is fixed to the door frame 200 using the bracket 150. The motor assembly 100 of the present invention has the advantage that the overall size is reduced by using an abduction type BLDC motor.

The driven pulley 210 is rotatably installed in a direction opposite to the driving pulley 140 of the motor assembly 100, and the belt 220 is coupled to the driving pulley 140 and the driven pulley 210.

The door 300 is movably provided under the door frame 200, and the belt coupling ring 310 fixed to the upper portion of the door 300 is fixed to the belt 220 using the fastening member 320. Accordingly, the movement of the belt 220 is transmitted to the door 300.

When the access detection sensor 400 detects a person who approaches the door 300, the controller (not shown) operates the motor 110 in the direction in which the door 300 is opened.

When the motor 110 is operated, as shown in FIG. 4, the first gear shaft 131 is driven, and the second reduction gear 135 engaged with the first reduction gear 132 of the first gear shaft 131 Is rotated. When the first reduction gear 132 rotates multiple times due to the difference in diameter between the first reduction gear 132 and the second reduction gear 135, the second reduction gear 135 rotates once and reduces the speed by the first time. do.

The third reduction gear 135a coupled to the second gear shaft 134 together with the second reduction gear 135 is rotated by meshing with the fourth reduction gear 138. When the third reduction gear 135a rotates multiple times due to the difference in diameter between the third reduction gear 135a and the fourth reduction gear 138, the fourth reduction gear 138 rotates once and the speed is reduced by the second. do.

The third gear shaft 137 transmits a larger force to the driving pulley 140 by the second speed reduction. The driving pulley 140 rotates in the rotational direction of the motor 110, and the belt 220 rotates in the rotational direction of the driving pulley 140.

The door 300 coupled to the belt 220 moves in the moving direction of the belt 220 and opens the door 300.

When the reference time elapses after the door 300 is opened, the controller (not shown) drives the motor 110 in the direction in which the door 300 is closed. The proximity sensor 500 provided on the side of the door 300 in the closing direction detects whether there is an obstacle while the door 300 is being closed.

When the proximity sensor 500 detects an obstacle, the controller (not shown) drives the motor 110 to open the door 300. Accordingly, since the door 300 is opened in advance before the door 300 reaches an obstacle, there is an advantage of preventing an accident in which a conventional person is caught in the automatic door 1 in advance.

As described above, the geared motor assembly and the automatic door using the same according to the present invention have the advantage of miniaturizing the overall size by using an abduction type BLDC motor.

In addition, a proximity sensor is provided on one side of the door, so that when there is an obstacle when the door is closed, the door is opened in advance without touching the obstacle. Accordingly, it is possible to prevent an accident in which a person is caught in the automatic door, and a problem in which the person is surprised or injured the person because the person does not touch the door can be prevented.

Meanwhile, an anti-corrosion coating layer may be applied to the reduction gear unit 130 to prevent corrosion of the metal surface. The coating material of this anticorrosive coating layer is benzimidazole 20% by weight, propylene glycol methyl ether 30% by weight, hafnium 15% by weight, molybdenum emulsified (MoS2) 10% by weight, aluminum oxide 15% by weight, bisphenol F type diglyci It consists of 10% by weight of diether, and the coating thickness can be formed to 8㎛.

Benzimidazole, propylene glycol methyl ether, and bisphenol F type diglycidyl ether play a role in preventing corrosion and discoloration.

Hafnium is a transition metal element with corrosion resistance and plays a role in having excellent waterproof and corrosion resistance.

Molybdenum emulsified plays a role of imparting wetness and lubricity to the surface of the coating film.

Aluminum oxide is added for the purpose of fire resistance and chemical stability.

The reason why the ratio of the constituent components and the coating thickness were numerically limited as described above is that the present inventors analyzed through the test results while repeatedly failing several times, and as a result, the optimum anti-corrosion effect was shown in the ratio.

In addition, an antifouling coating layer made of a composition for antifouling coating may be applied to the outer surface of the gearbox 120 so as to effectively prevent adhesion and removal of pollutants.

The antifouling coating composition contains cocamidopropylbetaine and amphoglycinate in a molar ratio of 1:0.01 to 1:2, and the total content of cocamidopropylbetaine and amphoglycinate is 1 to 10% by weight.

The molar ratio of cocamidopropylbetaine and amphoglycinate is preferably 1:0.01 to 1:2. If the molar ratio is out of the above range, the applicability of the gearbox 120 decreases or moisture absorption on the surface after application is reduced. There is a problem that the coating film is removed by increasing.

The cocamidopropylbetaine and amphoglycinate are preferably 1 to 10% by weight in the total composition aqueous solution, and if less than 1% by weight, there is a problem that the applicability of the gearbox 120 is deteriorated, and exceeds 10% by weight. Crystal precipitation is likely to occur due to an increase in the thickness of the coating film.

On the other hand, as a method of applying the present antifouling coating composition to the gearbox 120, it is preferable to apply it by a spray method. In addition, the thickness of the final coating film of the gearbox 120 is preferably 550 ~ 2000Å, more preferably 1100 ~ 1900Å. If the thickness of the coating film is less than 550 Å, there is a problem of deterioration in the case of high-temperature heat treatment, and if it exceeds 2000 Å, crystal precipitation on the coated surface is liable to occur.

In addition, the present antifouling coating composition may be prepared by adding 0.1 mol of cocamidopropylbetaine and 0.05 mol of amphoglycinate to 1000 ml of distilled water, followed by stirring.

In addition, a metal mesh foam is attached to the outer surface of the motor 110. This metal mesh foam is in the form of a metal mesh foam having pores.

The thermochromic layer is formed in a form that is applied to the surface of the metal mesh foam and penetrates the surface of the metal mesh foam.

In the thermochromic layer, two or more thermochromic materials that change color when the temperature is higher than a predetermined temperature are applied to the surface of the metal mesh foam and are separated into two or more sections according to the temperature change, so that a stepwise temperature change can be determined. A protective layer may be applied on the thermochromic layer to prevent damage to the thermochromic layer.

Here, the thermochromic layer may be formed by applying a thermochromic material having a discoloration temperature of 40°C or more and 60°C or more, respectively. The temperature discoloration layer is for detecting a temperature change of the heater motor 110 by changing color according to the temperature of the motor 110 that is indirectly heated as the internal temperature rises by the heater unit. The temperature of the motor 110 is transmitted to the metal mesh foam, and the temperature change layer 162 reacts according to the temperature change of the metal mesh foam, and as a result, the temperature change of the motor 110 can be sensed.

The thermochromic layer may be formed by applying a thermochromic material that changes color when it reaches a predetermined temperature or higher on the surface of the metal mesh foam. In addition, the thermochromic layer is generally composed of a microcapsule structure of 1 to 10 µm, and can be colored and transparent due to the bonding and separation phenomena of the electron donor and the electron acceptor according to the temperature in the microcapsule.

In addition, the color change layer has a fast color change, and may have various color change temperatures such as 40°C, 60°C, 70°C, 80°C, and the like, and the color change temperature can be easily adjusted in various ways. The thermochromic layer may use various types of thermochromic materials based on the principle of molecular rearrangement of organic compounds and spatial rearrangement of atomic groups.

To this end, it is preferable that the thermochromic layer is formed to be separated into two or more sections according to temperature changes by applying two or more thermochromic materials having different discoloration temperatures. It is preferable to use a thermochromic material having a relatively low discoloration temperature and a thermochromic material having a relatively high discoloration temperature, and more preferably, a discoloration temperature of 40℃ or more and 60℃ or more. A thermochromic layer can be formed by using a thermochromic material.

Through this, it is possible to check the temperature change of the motor 110 so that the temperature change of the motor 110 can be detected, and accordingly, it is easy to visually check whether the current motor 110 is in a normal driving state or an overheated state. There is an advantage to be able to.

In addition, the protective film layer is applied on the thermochromic layer to prevent damage to the thermochromic layer due to external impact, and at the same time, it is easy to check whether the thermochromic layer is discolored, and at the same time consider that the thermochromic material is weak to heat, it has an insulation effect. It is preferable to use a transparent coating material.

In addition, the belt 220 may be made of a rubber material, the raw material content ratio of the belt 220 is rubber 60% by weight, carbon black 33 to 36% by weight, antioxidant 2 to 5% by weight, accelerator sulfur 1 Mix ~3% by weight.

Carbon black is to increase abrasion resistance, so it is added, but if the content is less than 33% by weight, elasticity and abrasion resistance decrease, and if it exceeds 36% by weight, the content of rubber, which is the main component, is relatively small, so the elasticity may decrease. , 33 to 36% by weight are mixed.

Antioxidant is 3C (N-PHENYL-N'-ISOPROPYL- P-PHENYLENEDIAMINE) or RD (POLYMERIZED 2,2,4-TRIMETHYL-1,2-DIHYDROQUINOLINE) to add 2 to 5% by weight, 2 If it is less than% by weight, the product is liable to be oxidized, and if too much is added and exceeds 5% by weight, the content of rubber, which is the main component, is relatively small, and there is a fear that the elasticity may decrease, and the price of the antioxidant is expensive. ~5% by weight is appropriate.

Sulfur, which is an accelerator, is mixed with 1 to 3% by weight. If less than 1% by weight, the vulcanization effect in the heating process during molding is insignificant, so 1% by weight or more is added. If it exceeds 3% by weight, since the content of the rubber as the main component is relatively small, the elasticity may be lowered, so 1 to 3% by weight is appropriate.

Accordingly, the present invention is reinforced with synthetic rubber having elasticity in various directions, so that the elasticity, toughness and rigidity of the belt 220 are increased, so that durability is improved, and thus the life of the belt 220 is increased.

The embodiments of the geared motor assembly and the automatic door using the same of the present invention described above are merely exemplary, and various modifications and other equivalent embodiments are possible from those of ordinary skill in the art to which the present invention belongs. You can see the point well. Therefore, it will be appreciated that the present invention is not limited to the form mentioned in the detailed description above. Therefore, the true technical protection scope of the present invention should be determined by the technical spirit of the appended claims. In addition, the present invention is to be understood as including the spirit of the present invention as defined by the appended claims and all modifications, equivalents and substitutes within the scope thereof.

1: automatic door 100: motor assembly
110: motor 120: gearbox
121: motor seating surface 122: first bracket fitting
123: pulley seating surface 124: second bracket fitting
125: box cover 125a: second gear shaft coupling hole
125b: third gear shaft coupling hole 130: reduction gear part
131: first gear shaft 132: first reduction gear
133,133a: first bearing 134: second gear shaft
135: second reduction gear 135a: third reduction gear
136,136a: second bearing 137: third gear shaft
138: fourth reduction gear 139,139a: third bearing
140: drive pulley 141: shaft insertion hole
150: bracket 200: door frame
210: driven pulley 220: belt
300: door 310: belt coupling ring
320: fastening member 400: access detection sensor
500: proximity sensor

Claims (3)

A door frame 200 provided horizontally on the upper part of the entrance; A motor assembly 100 provided on one side of the door frame 200; An access detection sensor 400 provided in the door frame 200 to detect the approach of a person entering; A driven pulley 210 provided on the door frame 200 at a position opposite to the driving pulley 140 of the motor assembly 100; A belt 220 coupled to the driving pulley 140 and the driven pulley 210; A door 300 provided below the door frame 200 and having a belt coupling ring 310 provided thereon fixed to a region of the belt 220; A proximity sensor 500 provided on a side of the door 300 in a closing direction to detect an obstacle positioned in front of the door 300 in a closing direction; In the geared motor assembly for an automatic door further comprising a control unit for controlling the driving of the motor assembly 100 to open and close the door 300 according to the detection result of the entrance sensor 400 and the proximity sensor 500,
The motor assembly 100,
A motor 110 that is rotated and generates a driving force; A reduction gear unit 130 that receives the driving force of the motor 110 and adjusts the rotational speed; A gearbox 120 accommodating the reduction gear unit 130 therein and coupling the motor 110 and the reduction gear unit 130; A first bracket coupling portion 122 and a second bracket coupling portion 124 provided on both sides of the gearbox 120 and to which the bracket 150 is coupled; The gearbox 120 includes a driving pulley 140 provided on one side of the motor 110 to receive a driving force from the reduction gear unit 130 and transmit the driving force to the belt 220, and the motor 110 ) Is provided with an abduction type BLDC motor; The gearbox 120 includes a motor seating surface 121 on which the motor 110 is seated on an upper surface, and a pulley seating surface 123 on which the driving pulley 140 is seated on one side of the motor seating surface 121 Each is provided;
The reduction gear unit 130,
The first gear shaft 131, which is accommodated in the gearbox 120 perpendicular to the motor seating surface 121 and rotated forward and backward in connection with the driving of the motor 110, and the pulley seating surface 123 A third gear shaft 137 vertically accommodated in the gearbox 120, and a second gear rotatably provided in parallel between the first gear shaft 131 and the third gear shaft 137 Includes an axis 134; A first reduction gear 132 provided on the first gear shaft 131; A second reduction gear 135 coupled to the second gear shaft 134 and rotated in engagement with the first reduction gear 132 and provided with a larger diameter than the first reduction gear 132; A third reduction gear (135a) provided on the second gear shaft (134) under the second reduction gear (135) and having a diameter smaller than that of the second reduction gear (135); And a fourth reduction gear 138 provided on the third gear shaft 137 and rotated by meshing with the third reduction gear 135a and formed with a larger diameter than the third reduction gear 135a; The speed of the motor 110 is reduced by a ratio of 1:12 by the reduction gear train of the reduction gear unit 130 and transmitted to the driving pulley 140;
The box cover 125 is coupled to the lower portion of the gearbox 120 so that the first gear shaft 131, the second gear shaft 134, and the third gear shaft 137 of the reduction gear unit 130 can be rotated. Support; The box cover 125 includes a first bearing 133a supporting the lower end of the first gear shaft 131 and a second bearing 136a supporting the lower end of the second gear shaft 134. Geared motor for automatic door, characterized in that it is provided with a gear shaft coupling hole (125a) and a third gear shaft coupling hole (125b) in which the third bearing (139a) is seated to support the lower end of the third gear shaft (137) Assembly. delete delete

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