Driving host of electric lifting clothes drying rack

Abstract

The present invention discloses a driving host of an electric lifting clothes drying rack, the host comprises a machine box, two symmetrically arranged winding wheels are arranged in the machine box, each winding wheel has a worm wheel located at one end of the winding wheel, and a lifting and pulling line is respectively wound on the winding wheel, a driving motor is arranged on the machine box, a worm located between the two worm wheels is connected to the power shaft of the driving motor, and the worm is respectively meshed with the two worm wheels, the driving motor is electrically connected to an electric control mechanism, and a signal acquisition unit for collecting a signal of the number of revolutions of the worm and / or the number of revolutions of the winding wheel is connected to the electric control mechanism. The power shaft of the driving motor and the winding wheel are in a linkage relationship, the two rotate synchronously, and are directly related to the driving motor, so the signal collected by the signal acquisition unit can be fed back to the electric control mechanism in real time, and the electric control mechanism can also control the driving motor in a timely and rapid manner without time lag.

Description

Technical Field

[0001] The invention belongs to the technical field of electric clothes drying racks, and in particular relates to a driving main unit of an electric lifting clothes drying rack. Background Art

[0002] The electric lifting clothes rack is an intelligent furniture that many families will be equipped with. It not only eliminates the inconvenience caused by manual lifting, but also gives the clothes rack more additional functions.

[0003] In an electric lifting clothes drying rack, the lifting of the clothes drying rod is realized by a lifting control device. There are two common lifting control devices. One is as shown in the Chinese utility model patent with publication number CN207053319U, which includes a motor, a control circuit module for controlling the operation of the motor and a reduction mechanism. The reduction mechanism includes a reduction box and a transmission assembly arranged therein. The motor is installed on the reduction box, and the motor shaft of the motor extends into the reduction box and is connected to the transmission assembly in a transmission manner; the transmission assembly includes two wire rope winding wheels symmetrically installed in the reduction box, one end of the wire rope is fixed on the wire rope winding wheel, and the other end extends downward and is fixed to the clothes drying rod; the motor shaft is used to simultaneously drive the two wire rope winding wheels to rotate, so as to achieve simultaneous lifting and lowering of both ends of the clothes drying rod.

[0004] There is also a lifting control device as shown in the Chinese invention patent application with publication number CN107956093A, which includes a lifter shell, in which two symmetrical lifting systems are installed, and the working principles are exactly the same. Each lifting system includes a worm gear reduction drive motor, which is used to drive a wire rope winding wheel to rotate alone. The wire ropes at both ends of a clothesline are wound around a wire rope winding wheel, and the two lifting systems each drive a clothesline to lift and lower.

[0005] Regardless of the type of lifting control device, a driving motor braking mechanism needs to be set so that when the clothes drying rod is lifted to the extreme position, the driving motor can stop rotating to avoid over-driving and causing structural instability.

[0006] A limit and fault detection mechanism is disclosed in a Chinese invention patent application with publication number CN107956093A, which includes a bracket fixedly connected to a lifter housing, an intermediate fixed pin being installed on the bracket, and a movable pulley connected to the intermediate fixed pin through a tension spring; a lower limit switch located between the movable pulley and the intermediate fixed pin is also installed on the bracket, and an upper limit switch is also installed on the side of the movable pulley facing away from the intermediate fixed pin; the upper limit switch and the lower limit switch are both in a disconnected state when pressed down, and in a connected state when released, and the upper limit switch and the lower limit switch are respectively electrically connected to an electric control mechanism in the lifter housing. One end of the steel wire rope on the driving motor is fixed on the steel wire rope winding wheel, and the other end is connected to one end of the steel wire rope connector outside the lifting device housing after passing between the moving pulley on the limit and fault detection mechanism and the lower limit switch. The other end of the steel wire rope connector is connected to the front end steel wire rope of the clothes drying rod and the rear end steel wire rope of the clothes drying rod at the same time. After passing through a double fixed pulley installed on the top of the wall, the front end steel wire rope of the clothes drying rod and the rear end steel wire rope of the clothes drying rod are connected to the two ends of the clothes drying rod through the front end hoisting fixed pulley of the clothes drying rod and the rear end hoisting fixed pulley of the clothes drying rod respectively. There is a lower limit positioning rod between the front end steel wire rope of the clothes drying rod and the rear end steel wire rope of the clothes drying rod, which is installed at an appropriate height on the wall and is used to limit the downward limit position of the clothes drying rod.

[0007] During the descent of the clothes-drying rod, the steel wire rope is sent upward. When the clothes-drying rod is blocked by an obstacle, the steel wire rope between the moving pulley and the lower limit switch will loosen, and the moving pulley moves toward the middle fixed pin shaft under the tension of the tension spring. During the movement, the lower limit switch is pressed down and is in a disconnected state, and the drive motor stops working. When the obstacle is removed, the winding steel wire rope returns to a tensioned state under the gravity of the clothes-drying rod, and the moving pulley moves away from the lower limit switch under the tension of the winding steel wire rope. The lower limit switch is loosened and reconnected, and the drive motor resumes normal operation. When the clothes-drying rod reaches the lower limit position, the upward movement of the steel wire rope connector is blocked by the lower limit positioning rod, and the winding steel wire rope passing through the moving pulley will also loosen. The moving pulley presses the lower limit switch again under the tension of the tension spring, and the lower limit switch is in a disconnected state, and the drive motor stops working. During the rising process of the clothes drying rod, the winding wire rope is pulled down. When the wire rope connector moves downward and presses the upper limit switch, the upper limit switch is disconnected, the drive motor stops working, and the clothes drying rod reaches the upper limit position.

[0008] The shortcoming of this limiting mechanism is that its limiting method is to wait until the clothes drying rod reaches the upper or lower limit position, then trigger the limit switch, and finally the drive motor stops working; before the drive motor stops working, it takes a certain amount of time for the wire rope to loosen and the moving pulley to move, which causes a time lag in the drive motor stopping working. Summary of the invention

[0009] The object of the present invention is to provide a driving host of an electric lifting clothes drying rack capable of rapid response and timely control.

[0010] To achieve the above-mentioned object of the invention, the technical solution of the present invention is as follows:

[0011] A driving host of an electric lifting clothes drying rack comprises a machine box, in which two symmetrically arranged winding wheels are arranged, each winding wheel has a worm wheel located at one end of the winding wheel, and a lifting pulling line is respectively wound around the winding wheel, the machine box is provided with a driving motor, a worm located between the two worm wheels is connected to the power shaft of the driving motor, and the worm is respectively meshed with the two worm wheels, the driving motor is electrically connected to an electric control mechanism, and the electric control mechanism is connected to a signal collection unit for collecting signals of the number of rotations of the worm wheel and / or the number of rotations of the winding wheel.

[0012] The present invention utilizes a signal acquisition unit electrically connected to an electric control mechanism to realize braking of a driving motor. The signal acquisition unit can acquire a signal of the number of revolutions of the worm and / or the number of revolutions of the winding wheel. When the number of revolutions of the worm and / or the number of revolutions of the winding wheel reaches a preset value, the signal acquisition unit sends a control signal to the electric control mechanism, and the electric control mechanism commands the driving motor to stop working. The power shaft of the driving motor and the winding wheel are in a linkage relationship, the two rotate synchronously, and are directly related to the driving motor. Therefore, the signal acquired by the signal acquisition unit can be fed back to the electric control mechanism in real time, and the electric control mechanism can also control the driving motor promptly and quickly without time lag.

[0013] In the present invention, the signal acquisition unit may only acquire the signal of the number of rotations of the worm or the number of rotations of the winding wheel. In order to improve the braking accuracy, the signal of the number of rotations of the worm and the number of rotations of the winding wheel may also be acquired simultaneously.

[0014] There are various signal acquisition units that can identify and collect rotation number signals. As an example of a specific implementation, in the driving host of the above-mentioned electric lifting clothes drying rack, the signal acquisition unit includes a first magnetic body fixed on the worm and a second magnetic body fixed on any one of the winding wheels, the first magnetic body is correspondingly arranged with a fixed first Hall sensor element, the second magnetic body is correspondingly arranged with a fixed second Hall sensor element, and the first Hall sensor element and the second Hall sensor element are respectively connected to the electric control mechanism.

[0015] In order to further improve the control accuracy of the driving host over the driving motor, in the driving host of the above-mentioned electric lifting clothes drying rack, the electric control mechanism is also connected with an upper stroke touch switch and a lower stroke touch switch, and the upper stroke touch switch and the lower stroke touch switch are both located on the periphery of the trigger turntable, and an upper limit block and a lower limit block are provided on the outer edge of the trigger turntable. The winding wheel is connected to the trigger turntable through a gear reduction structure and can drive the trigger turntable to rotate, and when the trigger turntable rotates a set angle, the upper limit block and the lower limit block can respectively contact the upper stroke touch switch and the lower stroke touch switch to generate an upper stroke signal and a lower stroke signal respectively.

[0016] Under the action of the gear reduction structure, the trigger turntable only rotates one circle or less in each working process; when the number of turns of the winding wheel reaches the preset value (the trigger turntable rotates the preset angle), the upper limit block on the outer edge of the trigger turntable happens to contact the upper stroke touch switch, and an upper stroke signal is generated; or the lower limit block happens to contact the lower stroke touch switch, and a lower stroke signal is generated; after the electronic control mechanism receives the above-mentioned upper stroke signal or lower stroke signal, it commands the drive motor to stop working.

[0017] In the driving main unit of the above-mentioned electric lifting clothes drying rack, the gear reduction structure includes a first pinion rotating coaxially with the winding wheel and a gear ring arranged on the trigger turntable, and at least one double gear rotatably connected to the machine box, the double gear includes a large gear and a second small gear arranged coaxially, the large gear is meshed with the first pinion for transmission, and the second pinion is meshed with the gear ring for transmission.

[0018] The first small gear rotating coaxially with the winding wheel can realize the first reduction transmission, the large gear and the first small gear meshing with each other can realize the second reduction transmission, and the second small gear and the gear ring meshing with each other can realize the third reduction transmission, thereby effectively controlling the number of rotations of the trigger turntable within one week.

[0019] In the driving host of the above-mentioned electric lifting clothes drying rack, a stroke setting structure capable of adjusting the position of the upper limit block and / or the lower limit block on the circumference of the trigger turntable is provided between the trigger turntable and the upper limit block and / or the lower limit block, thereby changing the upper stroke and / or the lower stroke. The stroke setting structure can be used to adjust the position of the upper limit block and / or the lower limit block on the circumference of the trigger turntable, thereby adjusting the contact timing between the upper limit block and the upper stroke touch switch and / or the lower limit block and the lower stroke touch switch, so as to facilitate the customized adjustment of the stroke of the lifting and lowering pull line.

[0020] In the driving main unit of the above-mentioned electric lifting clothes drying rack, the stroke setting structure includes an adjustment block provided with an upper limit stopper, the adjustment block is provided with at least one first positioning hole, the outer edge of the trigger turntable is provided with a plurality of second positioning holes distributed in the circumferential direction, the first positioning hole and the second positioning hole are fixedly connected by fasteners; the lower limit stopper is connected as a whole with the trigger turntable.

[0021] Of course, the lower limit stopper can also be set to be movable along the outer edge of the trigger turntable, and the upper limit stopper can be set to be connected to the trigger turntable as a whole; or both the upper limit stopper and the lower limit stopper can be set to be movable along the outer edge of the trigger turntable.

[0022] In the driving main unit of the above-mentioned electric lifting clothes drying rack, the first positioning hole is in an arc shape.

[0023] In the driving host of the electric lifting clothes drying rack, the surface of the trigger turntable is provided with a travel indicator mark, and the adjustment block is provided with a pointing portion, and when the adjustment block changes position, the pointing portion points to a different position of the travel indicator mark. This makes it convenient for users to quickly adjust the position of the adjustment block according to specific application scenarios.

[0024] The signal acquisition unit, the upper stroke touch switch and the lower stroke touch switch can only control the travel end points of the lifting and pulling wire. However, when the lifting and pulling wire reaches the upper and lower limit positions, the lifting and pulling wire loaded with the clothes drying rack will continue to pull the winding wheel, causing a large load on the winding wheel and the driving motor; and when the lifting and pulling wire suddenly loosens and separates, the signal acquisition unit, the upper stroke touch switch and the lower stroke touch switch cannot send a signal to the electric control mechanism in time to stop the motor, and it is difficult to grasp the lifting and pulling wire in time, resulting in the risk of the clothes drying rack falling suddenly.

[0025] Therefore, in the driving main unit of the above-mentioned electric lifting clothes drying rack, the machine box is provided with two pulling wire inlets and outlets corresponding to the two winding wheels respectively, and each pulling wire inlet and outlet is provided with an auxiliary wire control mechanism.

[0026] In the driving main unit of the above-mentioned electric lifting clothes drying rack, the auxiliary control line mechanism includes a swinging member, one end of the swinging member is hinged at a hinge point located on one side of the lifting pull line, and a lateral touch switch is provided on one side of the swinging member. The swinging member is connected with an elastic structure that enables the swinging member to have a swinging tendency toward the lateral touch switch. When the lifting pull line passes through the swinging member and the lifting pull line is in a normally taut state, the lifting pull line applies a force to the swinging member to offset the swinging tendency, and when the lifting pull line is lower than the normally taut state, the swinging member swings toward the lateral touch switch and contacts the lateral touch switch to generate a control signal, and the lateral touch switch is electrically connected to the electric control mechanism, and when the electric control mechanism receives the control signal generated by the lateral touch switch, the electric control mechanism controls the drive motor to stop working.

[0027] In the auxiliary wire control mechanism, the swing member and the lateral touch switch are arranged relative to each other, and under the action of the elastic structure, the swing member has a tendency to swing toward the lateral touch switch; but since the lifting and pulling wire is passed through the swing member, when the lifting and pulling wire works normally and is in a taut state, the lifting and pulling wire will generate lateral pressure on the swing member, and the lateral pressure can offset the swinging tendency of the swing member toward the lateral touch switch, and the lateral touch switch is not triggered at this time. When the lifting and pulling wire reaches the limit position and stops lifting or the wire end is loose (i.e., lower than the normal taut state), the lateral pressure applied by the lifting and pulling wire on the swing member disappears, and the swing member swings toward the lateral touch switch under the action of the elastic structure and triggers the lateral touch switch; after receiving the control signal sent by the lateral touch switch, the electric control mechanism immediately commands the drive motor to stop working and stop retracting and releasing the lifting and pulling wire; at the same time, the swinging of the swing member can also clamp the lifting and pulling wire to prevent the lifting and pulling wire from lifting.

[0028] The auxiliary wire control mechanism can not only assist the upper and lower limit switches to stop the driving motor in time when the lifting and pulling wire reaches the upper and lower limit positions, but also clamp the lifting and pulling wire, thereby reducing the load pressure of the winding wheel and the driving motor to a certain extent; it can also stop the driving motor in time and clamp the lifting and pulling wire into position when the lifting and pulling wire accidentally loosens, thereby preventing the danger of the clothes drying rack falling suddenly.

[0029] In the driving host of the above-mentioned electric lifting clothes drying rack, the swinging member is hinged to the machine box and the hinge point is located on one side of the pull wire entrance and exit, and the lateral touch switch is fixed on the machine box and located on the other side of the pull wire entrance and exit.

[0030] In the driving main unit of the above-mentioned electric lifting clothes drying rack, the elastic structure includes a torsion spring arranged at the hinge point; or the elastic structure includes a tension spring, one end of which is connected to one end of the swinging member, and the other end is connected to the machine box.

[0031] In the driving main unit of the above-mentioned electric lifting clothes drying rack, a wire passing groove is opened on the swinging member, and the lifting and pulling wire is passed through the wire passing groove; a rolling body is provided on one side of the wire passing groove, and when the lifting and pulling wire is in a normally taut state, the lifting and pulling wire is suspended and passed through the wire passing groove and is in rolling contact with the rolling body, and when the swinging member swings to contact the lateral touch switch, the lifting and pulling wire is in contact with the groove wall of the wire passing groove; the wire passing groove is in the shape of an elongated strip and its extension direction is consistent with the width direction of the pulling wire entrance and exit; the rolling body is in the shape of a cylinder and is arranged parallel to the wire passing groove.

[0032] When the lifting and pulling wire is working normally and in a normal tension state, the lifting and pulling wire only rolls in contact with the rolling body, which not only enables the lifting and pulling wire to apply a force to the swinging member to offset its swinging tendency, but also protects the lifting and pulling wire and prevents the lifting and pulling wire from being excessively rubbed and shortening its service life. When the lifting and pulling wire is lower than the normal tension state, the swing of the swinging member causes the lifting and pulling wire to contact the groove wall of the wire groove, thereby achieving the clamping and positioning of the lifting and pulling wire.

[0033] On the one hand, the long wire groove provides sufficient space for the normal lifting and lowering of the lifting and pulling wire, and on the other hand, it shortens the swing distance of the swing member required to clamp the lifting and pulling wire, so that once the lifting and pulling wire has an abnormal working condition, the swing member can respond quickly and clamp the lifting and pulling wire.

[0034] Arranging the rolling body in parallel with the wire groove can further provide sufficient space for the normal lifting and lowering of the lifting and pulling wire.

[0035] When the lifting and pulling wire is clamped and positioned, the lifting and pulling wire is in an angled state at the swinging member, and the lifting and pulling wire fits the surface of the rolling body and the wall of the wire-passing groove respectively. However, the wall of the wire-passing groove has edges and corners, which will cause the lifting and pulling wire to be worn. Therefore, in the driving main unit of the above-mentioned electric lifting clothes drying rack, a recessed area is provided in the middle of the side of the wire-passing groove close to the rolling body, and when the swinging member swings to contact the lateral touch switch, the lifting and pulling wire is located in the recessed area. The recessed area prevents the lifting and pulling wire from contacting the edges and corners between the walls when it contacts the wire-passing groove, thereby preventing the lifting and pulling wire from being worn.

[0036] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0037] (1) The present invention utilizes a signal acquisition unit electrically connected to the electric control mechanism to realize the braking of the drive motor. The signal acquisition unit can acquire the signal of the number of revolutions of the worm and / or the number of revolutions of the winding wheel. When the number of revolutions of the worm and / or the number of revolutions of the winding wheel reaches a preset value, the signal acquisition unit sends a control signal to the electric control mechanism, and the electric control mechanism commands the drive motor to stop working. The power shaft of the drive motor and the winding wheel are in a linkage relationship, the two rotate synchronously, and are directly related to the drive motor. Therefore, the signal collected by the signal acquisition unit can be fed back to the electric control mechanism in real time, and the electric control mechanism can also control the drive motor in a timely and rapid manner without time lag.

[0038] (2) The driving host of the present invention is also provided with an upstroke touch switch and a downstroke touch switch connected to the electric control mechanism. Under the action of the gear reduction structure, the trigger turntable only rotates one circle or less in each working process; when the number of rotations of the winding wheel reaches a preset value (a set angle is rotated), the upper limit block on the outer edge of the trigger turntable happens to contact the upstroke touch switch, and an upstroke signal is generated; or the lower limit block happens to contact the downstroke touch switch, and a downstroke signal is generated; after the electric control mechanism receives the above-mentioned upstroke signal or downstroke signal, it commands the drive motor to stop working, and the auxiliary signal acquisition unit controls the drive motor, thereby further improving the control accuracy of the drive host over the drive motor.

[0039] (3) In the present invention, the stroke setting structure can be used to adjust the position of the upper limit block and / or the lower limit block on the circumference of the trigger turntable, thereby adjusting the contact timing between the upper limit block and the upper stroke touch switch and / or the lower limit block and the lower stroke touch switch, thereby facilitating customized adjustment of the stroke of the lifting and pulling line.

[0040] (4) The driving host of the present invention is also provided with an auxiliary line control mechanism, which can not only assist the upper and lower limit switches to stop the driving motor in time when the lifting and pulling wire reaches the upper and lower limit positions, but also clamp the lifting and pulling wire, thereby reducing the load pressure of the winding wheel and the driving motor to a certain extent; and can also stop the driving motor in time and clamp the lifting and pulling wire in place when the lifting and pulling wire is accidentally loosened, thereby preventing the danger of the clothes drying rack falling suddenly. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a structural schematic diagram of a driving main unit of the electric lifting clothes drying rack of the present invention;

[0042] Figure 2 It is a structural schematic diagram of the driving main body of the electric lifting clothes drying rack of the present invention from another viewing angle;

[0043] Figure 3 It is a schematic diagram of the exploded structure of the driving main unit of the electric lifting clothes drying rack of the present invention;

[0044] Figure 4 It is a structural schematic diagram of a signal acquisition unit in a driving host of an electric lifting clothes drying rack of the present invention;

[0045] Figure 5 It is a structural schematic diagram of a signal acquisition unit in a driving host of an electric lifting clothes drying rack of the present invention at another viewing angle;

[0046] Figure 6 for Figure 3 The structural diagram of the middle box;

[0047] Figure 7 for Figure 3 Structural diagram of the gear reduction structure. DETAILED DESCRIPTION

[0048] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0049] Example 1

[0050] like Figure 1 , Figure 2 and Figure 3 As shown, the driving main body of an electric lifting clothes drying rack in this embodiment includes a machine box 1, and the machine box 1 is composed of a box body 11 and a box cover 12, which are fixedly connected by bolts.

[0051] Two accommodating spaces 13 are symmetrically arranged in the box body 11. A winding wheel 3 is installed in each accommodating space 13. The central axis of the winding wheel 3 is rotationally connected to the machine box 1, and each winding wheel 3 has a worm gear 31 located at one end of the winding wheel 3.

[0052] A driving motor 2 electrically connected to an electric control mechanism (not shown) is fixedly mounted on one side of the box body 11, and a power shaft of the driving motor 2 is connected to a worm 21 disposed in the box body 11, and the worm 21 is respectively meshed with two worm wheels 31, so that the driving motor 2 drives the two winding wheels 3 to rotate simultaneously.

[0053] like Figure 4 and Figure 6 As shown, the box body 11 is formed with an oil storage tank 14 opposite to the worm 21. Lubricating oil is placed in the oil storage tank 14 to achieve real-time lubrication of the worm 21, so as to reduce the wear between the worm 21 and the worm wheel 31 and ensure the smooth operation of the drive motor 2. In the installation mode of the machine box 1 with the box cover 12 at the bottom and the box body 11 at the top, solid lubricating oil can be placed in the oil storage tank 14.

[0054] like Figure 4 and Figure 5 Shown, combined Figure 3It can be seen that a signal acquisition unit 6 connected to the electric control mechanism is installed on the machine box 1. The signal acquisition unit 6 is used to collect the rotation number signal of the worm 21 and the rotation number signal of the winding wheel 3.

[0055] In this embodiment, the signal acquisition unit 6 includes a first magnetic body (not shown in the figure) fixed on the worm 21 and a second magnetic body (not shown in the figure) fixed on any one of the winding wheels 3. A first through hole 21a for installing the first magnetic body is formed on the worm 21, and a second through hole 32 for installing the second magnetic body is formed on the winding wheel 3; the first magnetic body is arranged corresponding to the first Hall sensing element 61 fixedly set on the machine box 1, and the second magnetic body is arranged corresponding to the second Hall sensing element 62 fixedly set on the machine box 1, and the first Hall sensing element 61 and the second Hall sensing element 62 are respectively connected to the electric control mechanism.

[0056] When at least one of the number of revolutions of the worm 21 and the number of revolutions of the winding wheel 3 reaches a preset value, the signal acquisition unit 6 sends a control signal to the electric control mechanism, and the electric control mechanism instructs the drive motor 2 to stop working. The power shaft of the drive motor 2 and the winding wheel 3 are in a linkage relationship, the two rotate synchronously, and are directly related to the drive motor 2, so the signal collected by the signal acquisition unit 6 can be fed back to the electric control mechanism in real time, and the electric control mechanism can also control the drive motor 2 in a timely and rapid manner.

[0057] In addition to using the signal acquisition unit 6 to control the drive motor 2 , a brake mechanism 4 is also provided in this embodiment as an auxiliary to improve the control accuracy of the drive motor 2 by the electric control mechanism.

[0058] like Figure 2 and Figure 3 As shown, the brake mechanism 4 includes an upper stroke touch switch 41 and a lower stroke touch switch 42 connected to the electric control mechanism, the upper stroke touch switch 41 and the lower stroke touch switch 42 are fixedly mounted on the box body 11, and are both located on the periphery of the trigger turntable 44, and an upper limit stopper 44a and a lower limit stopper 44b are provided on the outer edge of the trigger turntable 44; the winding wheel 3 is connected to the trigger turntable 44 through a gear reduction structure 43 and can drive the trigger turntable 44 to rotate, and when the trigger turntable 44 rotates a set angle, the upper limit stopper 44a and the lower limit stopper 44b can respectively contact the upper stroke touch switch 41 and the lower stroke touch switch 42 to generate an upper stroke signal and a lower stroke signal respectively.

[0059] like Figure 7 Shown, combined Figure 3It can be seen that in this embodiment, the gear reduction structure 43 includes a first pinion 43a rotating coaxially with the winding wheel 3 and a toothed ring 43b arranged on the trigger turntable 44, and a double gear 43c rotatably connected to the machine box 1, and the double gear 43c includes a large gear 43ca and a second small gear 43cb arranged coaxially, the large gear 43ca is meshed with the first pinion 43a for transmission, and the second pinion 43cb is meshed with the toothed ring 43b for transmission.

[0060] The first pinion 43a rotating coaxially with the winding wheel 3 can realize the first reduction transmission, the large gear 43ca and the first pinion 43a meshing with each other can realize the second reduction transmission, and the second pinion 43cb and the gear ring 43b meshing with each other can realize the third reduction transmission, thereby effectively controlling the number of rotations of the trigger turntable 44 within one week.

[0061] When the number of rotations of the winding wheel 3 reaches a preset value (the trigger dial 44 rotates to a set angle), the upper limit stopper 44a on the outer edge of the trigger dial 44 happens to contact the upper stroke touch switch 41, and an upper stroke signal is generated; or the lower limit stopper 44b happens to contact the lower stroke touch switch 42, and a lower stroke signal is generated; after the electronic control mechanism receives the above-mentioned upper stroke signal or lower stroke signal, it commands the drive motor 2 to stop working.

[0062] The braking of the drive motor 2 caused by the signal acquisition unit 6 and the braking mechanism 4 is synchronous, and the two complement each other, which can improve the functional stability of the electronic control mechanism and the drive motor 2.

[0063] like Figure 2 and Figure 3 As shown, a stroke setting structure 7 is provided between the trigger turntable 44 and the upper limit stopper 44a, which can adjust the position of the upper limit stopper 44a on the circumference of the trigger turntable 44 to change the upper stroke. The stroke setting structure 7 can be used to adjust the position of the upper limit stopper 44a on the circumference of the trigger turntable 44, thereby adjusting the contact timing between the upper limit stopper 44a and the upper stroke touch switch 41, so as to facilitate the custom adjustment of the stroke of the lifting and pulling wire 100.

[0064] In this embodiment, the stroke setting structure 7 includes an adjustment block 71 provided with an upper limit stopper 44a, the adjustment block 71 is provided with at least one first positioning hole 71a, the outer edge of the trigger turntable 44 is provided with a plurality of second positioning holes 72 distributed in the circumferential direction, the first positioning hole 71a and the second positioning hole 72 are fixedly connected by fasteners; and the lower limit stopper 44b is connected to the trigger turntable 44 as a whole.

[0065] The first positioning hole 71a may be circular or may be shaped as follows. Figure 2As shown in the figure, compared with a circular shape, the arc-shaped first positioning hole 71 a has a larger adjustable range, and the position of the adjustment block 71 can be adjusted more accurately.

[0066] Of course, the lower limit stopper 44b can also be set to be movable along the outer edge of the trigger turntable 44, and the upper limit stopper 44a can be set to be connected to the trigger turntable 44 as a whole; or both the upper limit stopper 44a and the lower limit stopper 44b can be set to be movable along the outer edge of the trigger turntable 44.

[0067] like Figure 2 and Figure 3 As shown, the surface of the trigger dial 44 is also provided with a travel indicator mark 73, and the adjustment block 71 is provided with a pointing portion 71b. When the adjustment block 71 changes its position, the pointing portion 71b points to a different position of the travel indicator mark 73. This makes it convenient for the user to quickly adjust the position of the adjustment block 71 according to a specific application scenario.

[0068] The signal acquisition unit 6 and the braking mechanism 4 can only control the end points of the travel of the lifting and pulling wire 100, but when the lifting and pulling wire 100 reaches the upper and lower limit positions, the lifting and pulling wire 100 loaded with the clothes drying rack will continue to pull the winding wheel 3, causing a large load on the winding wheel 3 and the driving motor 2; and when the lifting and pulling wire 100 suddenly loosens (the lower end encounters resistance or the upper end is separated from the winding wheel 3), the signal acquisition unit 6 and the braking mechanism 4 cannot send a signal to the electronic control mechanism in time to stop the driving motor 2, and it is difficult to grasp the lifting and pulling wire 100 in time, resulting in the danger of the clothes drying rack falling suddenly.

[0069] Therefore, if Figure 2 and Figure 3 and Figure 4 and Figure 5 As shown, the box body 11 is provided with two pulling line inlets and outlets 15 corresponding to the two winding wheels 3 respectively, and each pulling line inlet and outlet 15 is provided with an auxiliary line control mechanism 5.

[0070] In this embodiment, the auxiliary line control mechanism 5 includes a swinging member 51, which is L-shaped. One end of the swinging member 51 is hinged to the box body 11 through a hinge shaft 52 to form a hinge point 50 located on one side of the pull line entrance and exit 15; a lateral touch switch 53 located on the other side of the pull line entrance and exit 15 is fixedly installed on the box body 11, and the touch point 53a of the lateral touch switch 53 is located on the arc trajectory at the end of the swinging member 51.

[0071] The swing member 51 is provided with a wire groove 51a, and the lifting and pulling wire 100 is passed through the wire groove 51a. Figure 2 and Figure 3As shown, the wire groove 51a is in a long strip shape and its extension direction is consistent with the width direction of the pull wire inlet and outlet 15. The length of the wire groove 51a is equivalent to the width of the pull wire inlet and outlet 15, which can provide sufficient space for the normal retraction and release of the lifting pull wire 100; and the width of the wire groove 51a is narrow, when the swing member 51 swings, it only needs to swing a small distance to drive the lifting pull wire 100 to deviate from the original running track, so as to achieve the clamping and positioning of the lifting pull wire 100.

[0072] like Figure 2 As shown, the swing member 51 is provided with an elastic structure 54 which enables the swing member 51 to have a swinging tendency toward the lateral touch switch 53. However, since the lifting and pulling wire 100 is passed through the swing member 51, when the lifting and pulling wire 100 works normally and is in a normally taut state, the lifting and pulling wire 100 will generate lateral pressure on the swing member 51, and the lateral pressure can offset the swinging tendency of the swing member 51 toward the lateral touch switch 53, and the lateral touch switch 53 is not triggered at this time. When the lifting and pulling wire 100 reaches the extreme position and stops lifting or the wire end is loose (that is, when it is lower than the normal tension state), the lateral pressure exerted by the lifting and pulling wire 100 on the swinging member 51 disappears, and the swinging member 51 swings toward the lateral touch switch 53 under the action of the elastic structure 54, and triggers the lateral touch switch 53; after receiving the control signal from the touch switch, the electric control mechanism immediately orders the drive motor 2 to stop working and stop retracting and releasing the lifting and pulling wire 100; at the same time, the swinging of the swinging member 51 can also clamp the lifting and pulling wire 100 to prevent the lifting and pulling wire 100 from lifting and lowering.

[0073] The lateral touch switch 53 used in this embodiment is a micro switch, which has high sensitivity and can respond quickly to generate a control signal.

[0074] The elastic structure 54 used in this embodiment includes a tension spring 54 a , one end of which is connected to one end of the swinging member 51 , and the other end of which is connected to the box body 11 .

[0075] like Figure 5 Shown, combined Figure 2 and Figure 3It can be seen that a cylindrical rolling body 55 is also rotatably installed on the side of the swing member 51 facing the pull wire entrance and exit 15, and the rolling body 55 is arranged parallel to the wire groove 51a. When the lifting pull wire 100 is in a normal tension state, the lifting pull wire 100 is suspended and passes through the wire groove 51a and rolls with the rolling body 55, so that the lifting pull wire 100 can not only apply a force to the swing member 51 to offset its swinging tendency, but also protect the lifting pull wire 100 and avoid excessive friction of the lifting pull wire 100, which will shorten its service life; and when the swing member 51 swings to contact the lateral touch switch 53, the lifting pull wire 100 contacts the groove wall of the wire groove 51a, thereby realizing the clamping and positioning of the lifting pull wire 100.

[0076] When the lifting and pulling wire 100 is clamped and positioned, the lifting and pulling wire 100 is in a folded state at the swinging member 51, and the lifting and pulling wire 100 is respectively in contact with the surface of the rolling body 55 and the groove wall of the wire groove 51a. However, there are edges and corners between the groove walls of the wire groove 51a, which will cause the lifting and pulling wire 100 to be worn. Figure 2 and Figure 3 As shown, in this embodiment, a recessed area 51b is provided in the middle of one side of the wire groove 51a close to the rolling body 55, and when the swing member 51 swings to contact the lateral touch switch 53, the lifting and pulling wire 100 is located in the recessed area 51b. The recessed area 51b prevents the lifting and pulling wire 100 from contacting the wire groove 51a without contacting the corners between the walls, thereby preventing the lifting and pulling wire 100 from being worn.

[0077] The working principle of the driving main unit of the electric lifting clothes drying rack in this embodiment is as follows:

[0078] When it is necessary to lower the lifting and pulling line 100, start the drive motor 2, and the drive motor 2 drives the winding wheel 3 to rotate through the worm 21 to release the lifting and pulling line 100. The lifting and pulling line 100 passes through the pulling line entrance and exit 15 and the wire groove 51a and then goes down; in this process, the signal acquisition unit 6 collects the number of rotations of the worm 21 and the number of rotations of the winding wheel 3, and the trigger turntable 44 also rotates slowly under the drive of the winding wheel 3; when the number of rotations of the worm 21 and the number of rotations of the winding wheel 3 detected by the signal acquisition unit 6 are equivalent to the preset values, the lower limit block 44b also contacts the lower stroke touch switch 42, and the electric control mechanism receives the control signal from the signal acquisition unit 6 and the lower stroke touch switch 42, and commands the drive motor 2 to stop working.

[0079] When it is necessary to retract the lifting and pulling wire 100, the drive motor 2 is started again, and the worm 21 drives the winding wheel 3 to rotate in the opposite direction to roll up the lifting and pulling wire 100. The lifting and pulling wire 100 passes through the pulling wire entrance and exit 15 and the wire groove 51a and then goes upward; in this process, the signal acquisition unit 6 collects the rotation number signal of the worm 21 and the rotation number signal of the winding wheel 3, and the trigger turntable 44 also rotates slowly under the drive of the winding wheel 3; when the rotation number of the worm 21 and the rotation number of the winding wheel 3 detected by the signal acquisition unit 6 are equivalent to the preset value, the upper limit block 44a also contacts the upper stroke touch switch 41, and the electric control mechanism receives the control signal sent by the signal acquisition unit 6 and the upper stroke touch switch 41, and commands the drive motor 2 to stop working.

[0080] During the entire process of lowering or retracting the lifting and pulling wire 100, the lifting and pulling wire 100 is in a normally taut state, and the force applied by the lifting and pulling wire 100 on the swinging member 51 prevents the swinging member 51 from swinging toward the lateral touch switch 53; when the lifting and pulling wire 100 reaches the lower limit position or the upper limit position, the force applied by the lifting and pulling wire 100 on the swinging member 51 disappears, and the swinging member 51 swings toward the lateral touch switch 53 driven by the tension spring 54a, and when the swinging member 51 contacts the touch point 53a of the lateral touch switch 53, the lateral touch switch 53 sends a control signal to the electric control mechanism, and after receiving the control signal sent by the touch switch, the electric control mechanism immediately orders the drive motor 2 to stop working and stop lowering or retracting the lifting and pulling wire 100; at the same time, after the swinging member 51 swings into place, it also clamps the lifting and pulling wire 100 to prevent the lifting and pulling wire 100 from rising and falling.

[0081] When the lifting and pulling wire 100 is lowered, if there is an obstacle under the clothes drying rack, or when the lifting and pulling wire 100 is lowered or retracted, if the end of the lifting and pulling wire 100 is loosened from the winding wheel 33 and drops rapidly, the lifting and pulling wire 100 will no longer remain taut; at this time, the force applied by the lifting and pulling wire 100 on the swinging member 51 also disappears, and the swinging member 51 swings toward the lateral touch switch 53 driven by the tension spring 54a. When the swinging member 51 contacts the touch point 53a of the lateral touch switch 53, the lateral touch switch 53 sends a control signal to the electric control mechanism. After receiving the control signal sent by the touch switch, the electric control mechanism immediately orders the drive motor 2 to stop working and stop lowering or retracting the lifting and pulling wire 100; at the same time, after the swinging member 51 swings into place, it also clamps the lifting and pulling wire 100 to prevent the lifting and pulling wire 100 from continuing to rise and fall.

Claims

1. A driving main unit of an electric lifting clothes drying rack, comprising a machine box (1), wherein two symmetrically arranged winding wheels (3) are arranged in the machine box (1), each winding wheel (3) has a worm wheel (31) located at one end of the winding wheel (3), and a lifting pulling line (100) is wound around the winding wheels (3), the machine box (1) is provided with a driving motor (2), a worm (21) located between the two worm wheels (31) is connected to the power shaft of the driving motor (2), and the worm (21) is meshed with the two worm wheels (31), the driving motor (2) is electrically connected to an electric control mechanism, and is characterized in that: The electric control mechanism is connected to a signal collection unit (6) for collecting a signal of the number of revolutions of the worm (21) and / or a signal of the number of revolutions of the winding wheel (3); The machine box (1) is provided with two pulling line inlets and outlets (15) corresponding to the two winding wheels (3), respectively, and each pulling line inlet and outlet (15) is provided with an auxiliary line control mechanism (5); The auxiliary line control mechanism (5) comprises a swinging member (51), one end of the swinging member (51) is hinged to a hinge point (50) located on one side of the lifting and pulling wire (100), one side of the swinging member (51) is provided with a lateral touch switch (53), the swinging member (51) is connected to an elastic structure (54) that enables the swinging member (51) to have a swinging tendency toward the lateral touch switch (53), the lifting and pulling wire (100) passes through the swinging member (51) and the lifting and pulling wire (100) is in a normally taut state. When the lifting and pulling wire (100) is in a tensioned state, the lifting and pulling wire (100) applies a force to the swinging member (51) to counteract the swinging tendency, and when the lifting and pulling wire (100) is lower than the normal tensioned state, the swinging member (51) swings toward the lateral touch switch (53) and contacts the lateral touch switch (53) to generate a control signal, the lateral touch switch (53) is electrically connected to the electric control mechanism, and when the electric control mechanism receives the control signal generated by the lateral touch switch (53), the electric control mechanism controls the drive motor (2) to stop working; The swing member (51) is provided with a wire groove (51a), and the lifting and pulling wire (100) is passed through the wire groove (51a); a rolling body (55) is provided on one side of the wire groove (51a); when the lifting and pulling wire (100) is in a normally taut state, the lifting and pulling wire (100) is suspended and passed through the wire groove (51a) and is in rolling contact with the rolling body (55); and when the swing member (51) swings to contact the lateral touch switch (53), the lifting and pulling wire (100) is in contact with the groove wall of the wire groove (51a); The swinging member and the lateral touch switch are arranged relatively to each other, and under the action of the elastic structure, the swinging member has a tendency to swing toward the lateral touch switch; but since the lifting and pulling wire is passed through the swinging member, when the lifting and pulling wire works normally and is in a taut state, the lifting and pulling wire will generate lateral pressure on the swinging member, and the lateral pressure can offset the swinging tendency of the swinging member toward the lateral touch switch, and the lateral touch switch is not triggered at this time; and when the lifting and pulling wire reaches the limit position and stops lifting or the wire end is loose, the lateral pressure applied by the lifting and pulling wire on the swinging member disappears, and the swinging member swings toward the lateral touch switch under the action of the elastic structure and triggers the lateral touch switch; after receiving the control signal from the lateral touch switch, the electric control mechanism immediately commands the drive motor to stop working and stop retracting and releasing the lifting and pulling wire; at the same time, the swinging of the swinging member can also clamp the lifting and pulling wire to prevent the lifting and pulling wire from lifting.

2. The driving main unit of the electric lifting clothes drying rack according to claim 1, characterized in that: The signal acquisition unit (6) comprises a first magnetic body fixed on the worm (21) and a second magnetic body fixed on any one of the winding wheels (3); the first magnetic body is arranged corresponding to a first fixed Hall sensing element (61); the second magnetic body is arranged corresponding to a second fixed Hall sensing element (62); the first Hall sensing element (61) and the second Hall sensing element (62) are respectively connected to an electric control mechanism.

3. The driving main unit of the electric lifting clothes drying rack according to claim 1 or 2, characterized in that: The electric control mechanism is also connected to an upper stroke touch switch (41) and a lower stroke touch switch (42). The upper stroke touch switch (41) and the lower stroke touch switch (42) are both located on the periphery of the trigger turntable (44). An upper limit stopper (44a) and a lower limit stopper (44b) are provided on the outer edge of the trigger turntable (44). The winding wheel (3) is connected to the trigger turntable (44) through a gear reduction structure (43) and can drive the trigger turntable (44) to rotate. When the trigger turntable (44) rotates by a set angle, the upper limit stopper (44a) and the lower limit stopper (44b) can respectively contact the upper stroke touch switch (41) and the lower stroke touch switch (42) to generate an upper stroke signal and a lower stroke signal respectively.

4. The driving main unit of the electric lifting clothes drying rack according to claim 3, characterized in that: The gear reduction structure (43) comprises a first pinion (43a) coaxially rotating with the winding wheel (3) and a toothed ring (43b) arranged on the triggering rotating disk (44), and at least one double gear (43c) rotatably connected to the machine box (1), the double gear (43c) comprising a large gear (43ca) and a second pinion (43cb) coaxially arranged, the large gear (43ca) meshing with the first pinion (43a) for transmission, and the second pinion (43cb) meshing with the toothed ring (43b) for transmission.

5. The driving main unit of the electric lifting clothes drying rack according to claim 3, characterized in that: A stroke setting structure (7) is provided between the trigger turntable (44) and the upper limit stopper (44a) and / or the lower limit stopper (44b), which is capable of adjusting the position of the upper limit stopper (44a) and / or the lower limit stopper (44b) on the circumference of the trigger turntable (44) to thereby change the upper stroke and / or the lower stroke.

6. The driving main unit of the electric lifting clothes drying rack according to claim 5, characterized in that: The stroke setting structure (7) comprises an adjustment block (71) provided with an upper limit stopper (44a), the adjustment block (71) being provided with at least one first positioning hole (71a), the outer edge of the trigger turntable (44) being provided with a plurality of second positioning holes (72) distributed in a circumferential direction, the first positioning hole (71a) and the second positioning holes (72) being fixedly connected by a fastener; and the lower limit stopper (44b) being connected to the trigger turntable (44) as a whole.

7. The driving main unit of the electric lifting clothes drying rack according to claim 6, characterized in that: The first positioning hole (71a) is in an arc shape.

8. The driving main unit of the electric lifting clothes drying rack according to claim 6, characterized in that: A travel indication mark (73) is provided on the surface of the trigger turntable (44), and a pointing portion (71b) is provided on the adjustment block (71), and when the adjustment block (71) changes position, the pointing portion (71b) points to a different position of the travel indication mark (73).

9. The driving main unit of the electric lifting clothes drying rack according to claim 1, characterized in that: The swing member (51) is hinged to the machine box (1) and the hinge point (50) is located on one side of the pull wire inlet and outlet (15), and the lateral touch switch (53) is fixed on the machine box (1) and is located on the other side of the pull wire inlet and outlet (15).

10. The driving main unit of the electric lifting clothes drying rack according to claim 1, characterized in that: The elastic structure (54) includes a torsion spring arranged at the hinge point (50); or the elastic structure (54) includes a tension spring (54a), one end of the tension spring (54a) is connected to one end of the swinging member (51), and the other end is connected to the machine box (1).

11. The driving main unit of the electric lifting clothes drying rack according to claim 1, characterized in that: The wire passing groove (51a) is in the shape of an elongated strip and its extension direction is consistent with the width direction of the pulling wire inlet and outlet (15); the rolling body (55) is in the shape of a cylinder and is arranged parallel to the wire passing groove (51a).

12. The driving main unit of the electric lifting clothes drying rack according to claim 1, characterized in that: A recessed area (51b) is provided in the middle of one side of the wire passing groove (51a) close to the rolling body (55), and when the swing member (51) swings to contact the lateral touch switch (53), the lifting and pulling wire (100) is located in the recessed area (51b).

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