KR200419017Y1 - Speed reduction motor with wire bobbin - Google Patents

Abstract

The present invention relates to a wire bobbin-integrated reduction motor, which can compact the structure of the reduction motor, protect the components of the reduction gear, and smoothly lift the lifting object connected to the free end of the wire. The purpose.

The wire bobbin integrated reduction motor of the present invention includes a motor capable of forward and reverse driving and a speed reducer for reducing the rotational speed of the motor. The speed reducer includes a housing having an insertion space opened and closed by a cover and having a drawing slit for drawing wires on both sides of the sidewall, a worm formed on a drive shaft of the motor drawn out from the motor into the insertion space, and the worm. A pair of worm wheels engaged with the left and right sides to be rotatably inserted into the insertion space, and coaxially coupled to each of the worm wheels and inserted to rotate together with the worm wheel in the insertion space, and one end of each wire is connected. And a reducer having a pair of bobbins wound around the outer circumferential surface and having a free end formed to be connected to the lifting object through the drawout slit.

Description

Reduction Motor with Integrated Wire Bobbins {SPEED REDUCTION MOTOR WITH WIRE BOBBIN}

1 is a perspective view showing a general ceiling-type electric laundry dryer.

2 is a cross-sectional view showing a state where a conventional electric laundry dryer to which a reduction speed motor is applied is installed on a ceiling.

3 is a schematic perspective view showing an example of a wire bobbin-integrated reduction motor according to the present invention.

4 is a plan sectional view showing an example of a wire bobbin-integrated reduction motor according to the present invention.

Figure 5 is a front sectional view showing the internal structure of the reducer constituting the wire bobbin integrated reduction motor according to the present invention.

6 is a plan sectional view showing another example of the wire bobbin-integrated reduction motor according to the present invention.

7 is a cross-sectional view showing a state in which the wire bobbin-integrated reduction motor according to the present invention is installed on an electric laundry dryer.

<Explanation of symbols for the main parts of the drawings>

15: bracket, 45a, 45b: wire,

110: motor, 111: motor case,

113: drive shaft, 114: worm (Worm),

120: reducer, 121: housing,

122: insertion space, 123: withdrawal slit,

124: support shaft, 125: insertion groove,

126: support flange, 128: cover,

129: Gasket, 130a, 130b: Worm Wheel,

131: coupling groove, 132: Worm Wheel Shaft,

140a, 140b: Bobbin, 141: Bobbin shaft,

143: engaging projection, 150: rotary encoder (Rotary Encoder),

160a, 160b: tension sensor.

The present invention relates to a wire bobbin-integrated reduction motor, and in particular, employs a reducer having a pair of worm wheels engaged to both left and right sides by a worm formed on a drive shaft of a motor, and a wire connected to a lifting object. Combining the bobbin is wound around the worm wheel integrally, and by winding and unwinding the wire to each bobbin through the left and right sides of the reducer, it is possible to compact the structure of the reduction motor, and to protect the components of the reducer. The present invention relates to a wire bobbin-integrated reduction motor capable of smoothly elevating an elevating object connected to a free end of a wire.

Among the devices constituting various lifting devices including a reduction motor, for example, lifting devices, lifting banners, electric laundry dryers installed in the interior or veranda of various residential areas such as apartments or general houses, for example, The electric laundry dryer is configured as shown in FIGS. 1 and 2.

As shown in Fig. 1 and 2, the electric clothes drying rack, the housing 10, the lower portion of which is opened and closed by the cover 11 and fixed to the ceiling; A pair of holders (21a, 21b) disposed on both lower sides of the housing (10) and a plurality of drying rods (22) supported in parallel at predetermined intervals across the holders to hang the laundry; A drying rack 20; A pair of elastic links 30a and 30b having an upper end coupled to the housing 10 and a lower end coupled to the holder 21; And, the lifting device 40 for stretching and adjusting the expansion link (30a, 30b); comprises a.

The lifting and lowering device 40 includes a motor 42 capable of forward and backward driving provided in the housing 10 and a reduction gear 43 for reducing the rotational speed of the motor 42. And bobbins 44 coupled to the output shafts of the reducer 43 and alternately wound around the bobbins 44 so that both ends thereof are lower ends of the holders 21 or the elastic links 30a and 30b. It may be made including a wire 45 connected to. In addition, a plurality of support rollers 46a and 46b may be installed inside the housing 10 to guide the windings and the sea circle while supporting the wires 45a and 45b. In addition, moving passages 12 may be formed at both ends of the cover 11 so that the elastic links 30a and 30b and the wires 46a and 46b may move. The reducer 43 is typically provided with a worm formed on the drive shaft of the motor 42 and a worm wheel engaged with the worm, thereby reducing the rotational speed of the motor 42 to convert the driving direction to a right angle. The bobbin 44 is coupled to the output shaft of the worm wheel.

According to the conventional electric laundry dryer configured as described above, when the reduction motor 41 is driven down by, for example, an operation switch or a remote controller not shown, the rotational force of the motor 42 is decelerated through the reduction gear 43 so as to reduce the bobbin ( 44, and the extension link (30a) by the weight of the laundry widely distributed in the lifting object, that is, the expansion link (30a, 30b), drying table 20 and the drying table 20 in accordance with the rotation of the bobbin 44 And 30b are extended downwards, and the wires 45a and 45b are released to both sides of the bobbin 44, and the lifting object is lowered. When the position of the drying rod 22 of the drying table 20 is lowered to an appropriate position, the driving of the motor 42 is stopped, the laundry is placed on the drying rod 22, and then the motor 42 is moved to an appropriate position. Raise.

By the way, in the reduction motor 41 installed in the above-mentioned apparatus, such as a laundry drying rack, for elevating and driving a lifting object, there exist the following problems.

That is, since the bobbin 44 is coupled to the output shaft of the reducer 43 in the form of a cantilever, the load during winding and unwinding of the wires 45a and 45b is biased so that a bending moment acts greatly on the output shaft of the reducer 43. By doing so, there is a problem that the gears inside the reducer 43 are easily damaged. In addition, since the bobbin 44 is exposed to the outside of the reduction motor 41, when the tension of the wires 45a and 45b is loosened, the wires 45a and 45b may be separated from the bobbin 44. There is also.

The present invention has been made in view of the above-mentioned conventional problems, and employs a reducer having a pair of worm wheels engaged with both left and right sides with a worm formed on a drive shaft of a motor, and a bobbin on which a wire connected to a lifting object is wound. Is integrally coupled to each of the worm wheels, and by winding and unwinding the wires on the bobbins through the left and right sides of the reducer, the structure of the reduction motor can be made compact, and the components of the reducer can be protected, An object of the present invention is to make it possible to smoothly lift and lower the lifting object connected to the free end.

In order to achieve the above object, the wire bobbin-integrated reduction motor according to the present invention, the motor capable of forward and backward driving; A housing having an insertion space opened and closed by a cover and having a drawing slit through which wires can be drawn on both sides of the side wall, a worm formed on a drive shaft of the motor drawn out from the motor into the insertion space, and on the worm. A pair of worm wheels engaged with the left and right sides and rotatably inserted into the insertion space, and coaxially coupled to each worm wheel and inserted to rotate together with the worm wheel in the insertion space, and one end of each wire is connected And a reducer having a pair of bobbins wound around the outer circumferential surface thereof so that the free end is connected to the elevating object through the withdrawal slit.

In addition, the bobbin is disposed on the bottom side of the housing, the support shaft for rotatably supporting the bobbin may be formed on the bottom of the housing. On the contrary, an insertion groove is formed at the bottom of the housing, and the bobbin may be formed with a bobbin shaft rotatably inserted into the insertion groove.

In addition, the bobbin and the worm wheel, not only can be coupled to each other by a plurality of bolts, but also a plurality of coupling grooves formed in the worm wheel and a plurality of coupling protrusions formed in the bobbin to be inserted into the coupling grooves. Can be combined with each other.

In addition, any one of the worm wheels is provided with a worm wheel shaft (Worm Wheel Shaft) protruding out of the cover, the cover may be provided with a rotary encoder (Rotary Encoder) for detecting the rotational speed and rotation angle of the worm wheel shaft have.

In addition, a tension sensor may be installed at each lead slit side of the housing when the tension of the wire is loosened.

In addition, in order to prevent the wire from leaving out, it is preferable that the gap between the maximum outer diameter of the bobbin and the inner circumferential surface of the housing is smaller than the diameter of the wire.

In addition, a gasket may be interposed between the cover and the housing to prevent leakage of the lubricant supplied for lubrication inside the speed reducer.

In addition, it is preferable that the end opposite to the side on which the worm is formed in the drive shaft of the motor is drawn out of the case of the motor so as to be manually rotated.

In addition, at the bottom of the outer circumferential surface of the housing, at least two support flanges may be formed to be detachably coupled to the installation place by fastening means.

The features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings. Prior to this, terms or words used in the present specification and claims are defined in the technical spirit of the present invention based on the principle that the inventor can appropriately define the concept of the term in order to best describe his or her own design. It must be interpreted to mean meanings and concepts.

3 to 5 is shown a wire bobbin-integrated reduction motor according to the present invention.

The reduction motor 100 according to the present invention includes a motor 110 capable of forward and reverse driving, and a reduction gear 120 for reducing the rotation speed of the motor 110.

The reducer 120 is coupled to the housing 121, the worm 114 formed on the drive shaft 113 of the motor 110 drawn out into the housing 121, and a pair engaged with the worm 114. Worm wheels 130a and 130b and a pair of bobbins 140a and 140b coupled to the respective worm wheels 130a and 130b.

The housing 121 may be detachably coupled to the front of the case 111 of the motor 110 and may be integrally formed. The rear of the case 111 of the motor 110 is to be opened and closed by the cover (112). In addition, the housing 121 has an insertion space 122 that is opened and closed by the cover 128, the insertion space 122 may be formed, for example, of a substantially dumbbell-like structure. In addition, with both ends of the side wall of the housing 121, withdrawal slits for drawing wires 45a and 45b (see FIG. 7) connected to the lifting object while one end is wound and connected to the bobbins 140a and 140b ( 123 are formed respectively. In addition, a gasket 129 is interposed between the housing 121 and the cover 128 so that lubricant such as grease injected for lubrication of components inserted into the housing 121 does not leak. It is desirable to be. As the gasket 129, for example, oil paper may be applied.

The drive shaft 113 of the motor 110 is drawn out in a horizontal structure toward the center of the insertion space 122 of the housing 121, and a worm 114 is formed at an end portion of the drive shaft 113 drawn as described above. The worm wheels 130a and 130b are engaged with the worm 114 so as to rotate in accordance with the rotation of the worm 114 in both of the worms 114 of the insertion space 122. Therefore, when the worm 114 rotates, the worm wheels 130a and 130b rotate in opposite directions.

As shown in FIG. 5, the bobbins 140a and 140b are coaxially coupled to the respective worm wheels 130a and 130b and are inserted to rotate together with the worm wheels 130a and 130b in the insertion space 122. .

The bobbins 140a and 140b are disposed at the bottom of the housing 121, and the support shaft 124 is inserted into the bobbin 140a at the bottom of the housing 121 to rotatably support the bobbin 140a. ) May be formed. On the contrary, the insertion groove 125 may be formed at the bottom of the housing 121, and the bobbin shaft 141 may be formed in the bobbin 140b to be rotatably inserted into the insertion groove 125. In FIG. 5, for convenience of description, the rotary support structures of the bobbins 140a and 140b are different from each other by being divided into the left and right sides of the housing 121, but in any case, the same structure is preferably applied to the left and right. In addition, it is preferable that a bearing be interposed in such a rotation support structure.

On the other hand, looking at the coupling structure of the bobbin (140a, 140b) and the worm wheel (130a, 130b), as shown in Figure 5, the surface of the bobbin (140a) facing the worm wheel (130a) of the worm wheel (130a) A coupling shaft 142 coupled to the center is formed, and the bobbin 140a and the worm wheel 130a may be coupled to each other by a plurality of bolts 145. Alternatively, as illustrated in FIGS. 4 and 5, a coupling shaft 142 coupled to the center of the worm wheel 130b is formed on a surface facing the worm wheel 130b and a plurality of couplings along an edge portion thereof. A protrusion 143 is formed, and a plurality of coupling grooves 131 into which the coupling protrusion 143 is inserted and coupled to the worm wheel 130b is formed, such that the bobbin 140b and the worm wheel 130b are coupled to each other. Can be. In FIG. 5, for convenience of description, two types are shown differently from the left and right sides of the housing 121 with respect to the coupling structure of the bobbins 140a and 140b and the worm wheels 130a and 130b. It is preferable that the same structure is applied from side to side as shown in FIG.

Coupling shaft 142 formed on any one of the bobbin (140a, 140b) of the bobbin (140b) is projected out of the cover 128 through the worm wheel (130b), it can function as the worm wheel shaft 132 In addition, a worm wheel shaft 132 protruding out of the cover 128 may be provided separately from the center of one of the worm wheels 130b of the worm wheels 130a and 130b. In either case, the same is true of the function. In addition, a bearing may be interposed in the cover 128 to support rotation of the worm wheel shaft 132. As such, when the worm wheel shaft 132 protrudes out of the cover 128, a rotary encoder 150 is installed on the cover 128 to detect the rotation speed and the rotation angle of the worm wheel shaft 132. Lifting position control of the lifting object connected to 45 can be made easy.

In order for the wires 45a and 45b to be simultaneously wound on the bobbins 140a and 140b and to be unwound simultaneously from the bobbins 140a and 140b, the wires 45a and 45b are connected to the bobbins 140a and 140b respectively. The bobbins 140a and 140b are wound in opposite directions to each other, and are connected to the lifting object through the withdrawal slit 123. For example, Figure 7 shows that the wire bobbin-integrated reduction motor 100 of the present invention is installed on the ceiling-mounted electric clothes drying rack, where the other reference numerals of FIGS. 1 and 2 are shown.

Meanwhile, tension pull sensors 160a and 160b may be installed at the drawout slits 123 of the housing 121 to detect the tensions of the wires 45a and 45b, respectively. As the tension detecting sensors 160a and 160b, for example, a contact type proximity switch that senses an approach object by contact, such as a limit switch, or a non-contact proximity sensor that senses an access object by light or high frequency oscillation may be applied. . The tension detecting sensor (160a, 160b), in consideration of the fact that the reduction motor 100 of the present invention can be installed as shown in Figure 7, or inverted state, in any case wire 45a, It is preferable to be installed so as to be below 45b). That is, when the tension of the wires 45a and 45b is loosened, the wires 45a and 45b sag downwards as shown by the dotted lines in FIG. 5, and the tension sensors 160a and 160b are connected to the wires 45a and 45b. By being located underneath, it is possible to detect that the wires 45a and 45b sag.

In addition, in order to prevent the wires 45a and 45b from escaping out, the gap between the maximum outer diameter of the bobbins 140a and 140b and the inner circumferential surface of the housing 121 is preferably smaller than the diameter of the wires 45a and 45b. Do. In other words, the gap may be such that the wires 45a and 45b do not cause a problem in winding and unwinding.

In addition, the end of the driving shaft 113 of the motor 110 opposite to the side on which the worm 114 is formed may be drawn out of the case 111 of the motor 110 so as to be manually rotated. Specifically, it is drawn out of the cover 112 of the motor 110. As such, when the driving shaft 113 of the motor 110 is drawn out of the motor 110, when it is sensed that the tension of the wires 45a and 45b is loosened by the tension detecting sensors 160a and 160b, In order to solve this problem, by manually rotating the drive shaft 113 to wind the wires 45a and 45b, the tension can be properly adjusted.

In addition, in order to support the wire bobbin-integrated reduction motor 100 of the present invention in various installation places, for example, inside the housing 121 of the electric clothes dryer, as shown in FIG. 7, as shown in FIGS. 3 and 4, Before and after the lower end of the outer circumferential surface of the housing 121, four support flanges 126 that can be detachably coupled to the installation place may be formed. Unlike this, as shown in FIG. 6, support flanges 126 may be formed on both sides of lower ends of the outer circumferential surface of the housing 121, respectively. By the support flange 126 as described above, as shown in Figure 7, the reduction motor 100 of the present invention, for example, the fastening means to the bracket 15 formed in the housing 121 of the electric clothes dryer As the support flanges 126 are detachably coupled to each other, the support flanges 126 may be supported.

Next, the operation of the wire bobbin integrated reduction motor according to the present invention configured as described above will be described. Here, the reduction motor of the present invention, as shown in Figure 7, it will be described that applied to, for example, a ceiling-mounted clothes drying rack.

In order to dry the laundry, first driving down the reduction motor 100 of the present invention by an operation switch or a remote control not shown, the rotational force of the motor 110 is reduced by the worm 114 and the worm wheels (130a, 130b) And the driving direction is changed at right angles. Since the worm 114 is located at the center, the worm wheels 130a and 130b rotate to unwind the wires 45a and 45b in opposite directions. Therefore, the stretch links 30a and 30b are extended downward by the weight of the laundry, which is widely applied to lifting objects, that is, the stretchable links 30a and 30b, the drying table 20 and the drying table 20, and the wires 45a and 45b. ) Are released, the lifting object descends. When the position of the drying rod 22 of the drying rack 20 is lowered to an appropriate position, the driving of the reduction motor 100 is stopped, the laundry is hung on the drying rod 22, and the deceleration is performed again so that the activity of the occupants is not disturbed. The motor 100 is driven up and raised to an appropriate position to dry the laundry.

In the process as described above, the wires 45a and 45b are unwinded and wound in opposite directions from each bobbin 140a and 140b, and each bobbin 140a and 140b has a stable structure inside the housing 121. Since the rotation is prevented from occurring in the load, it is possible to effectively prevent the driving elements of the reducer 120 from being damaged, as well as to smoothly lift the elevating object.

In addition, the bobbins 140a and 140b to which the wires 45a and 45b are wound are inserted into the housing 121 to prevent the wires 45a and 45b from being separated from the bobbins 140a and 140b. Can be.

According to the wire bobbin-integrated reduction motor according to the present invention configured as described above, since the wires are to be unwinded and wound in opposite directions without being subjected to load variation from each bobbin, it is effective to prevent the driving elements of the reducer from being damaged. By preventing the durability of the reduction motor can be increased, and the lifting object can be lifted smoothly, the lifting performance can be improved.

In addition, since the bobbin to which the wire is wound may be inserted into the housing to prevent the wire from being separated from the bobbin, the lifting device to which the reduction motor of the present invention is applied may be prevented from being broken due to the detachment of the wire. In addition, the overall size of the wire bobbin-integrated reduction motor can be reduced.

Claims (8)

A motor capable of forward and reverse driving; A housing having an insertion space opened and closed by a cover and having a drawing slit for drawing wires on both sides of the side wall, a worm formed on a drive shaft of the motor drawn out from the motor into the insertion space, and to the left and right sides of the worm; A pair of worm wheels that are engaged and rotatably inserted into the insertion space, and are coaxially coupled to each of the worm wheels and inserted to rotate together with the worm wheel in the insertion space, and one end of each wire is connected and wound on an outer circumferential surface thereof. And a reducer having a pair of bobbins formed so that the free end is connected to the elevating object through the drawout slit. The method of claim 1, The bobbin is disposed on the bottom side of the housing, the bottom of the housing is a wire bobbin integrated reduction motor, characterized in that the support shaft for rotatably supporting the bobbin is formed. The method of claim 1, An insertion groove is formed in the bottom of the housing, and the bobbin integral reduction gear motor, characterized in that the bobbin shaft is rotatably inserted into the insertion groove. The method of claim 1, The bobbin and the worm wheel, wire bobbin-integrated reduction motor, characterized in that coupled to each other by a plurality of coupling grooves formed in the worm wheel and a plurality of coupling protrusions formed in the bobbin to be inserted into the coupling groove. The method of claim 1, One of the worm wheels is provided with a worm wheel shaft (Worm Wheel Shaft) protruding out of the cover, the cover is provided with a rotary encoder (Rotary Encoder) for detecting the rotational speed and rotation angle of the worm wheel shaft Reduction motor with integrated wire bobbin. The method of claim 1, Each pull-out slit side of the housing, the wire bobbin-integrated reduction motor, characterized in that the tension sensing sensor for detecting this when the tension of the wire is loosened, respectively. The method of claim 1, In order to prevent the wire wound around the bobbin is not separated out, the gap between the maximum outer diameter of the bobbin and the inner peripheral surface of the housing is smaller than the diameter of the wire bobbin-integrated reduction motor. The method of claim 1, End of the drive shaft of the motor opposite to the side on which the worm is formed, the wire bobbin-integrated reduction motor, characterized in that it is drawn out of the cover of the motor to be rotated manually.

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