CN113023501B

CN113023501B - High-efficient driven rope belt elastic device and wearing article

Info

Publication number: CN113023501B
Application number: CN201911250827.7A
Authority: CN
Inventors: 李蒙; 张金宇; 叶茂; 李清; 蔡益民; 朱锐
Original assignee: Suzhou Sinnotech Technology Co ltd
Current assignee: Suzhou Sinnotech Technology Co ltd
Priority date: 2019-12-09
Filing date: 2019-12-09
Publication date: 2023-05-26
Anticipated expiration: 2039-12-09
Also published as: CN113023501A

Abstract

The invention discloses a rope belt elastic device with high-efficiency transmission and a wearing product, wherein the rope belt with the high-efficiency transmission comprises a base, an upper shell, a driving mechanism and a winding shaft; the spool is provided with a spool and a fluted disc; the driving mechanism comprises a motor, a gearbox and a worm, and the motor drives the worm to rotate through the gearbox; the worm is meshed with the fluted disc and drives the wire spool fixedly connected with the fluted disc to rotate so as to tighten or loosen the rope belt; one end of the worm, which is far away from the gearbox, is provided with an arc-shaped end head; an axial supporting part is arranged on the upper shell, and the arc-shaped end head is propped against the axial supporting part; when the worm is a right-handed worm, the wire spool is arranged to tighten the rope when rotating clockwise; when the worm is a left-hand worm, the spool is arranged to tighten the strap when rotated counter-clockwise. The rope belt loosening and tightening device with high-efficiency transmission can effectively reduce friction resistance of the worm in the tightening and rotating process, and improves transmission efficiency.

Description

High-efficient driven rope belt elastic device and wearing article

Technical Field

The invention relates to the technical field of automatic rope belt tightness, in particular to a rope belt tightness device with efficient transmission and a wearing product.

Background

Currently, wearing articles, such as shoes, briefs, undergarments, windwear, etc., are often provided with cinching straps to facilitate adjustment of the state of use. With the improvement of the living standard of people, products capable of realizing the automatic tightening demand of the lace are increasingly popular with people, such as shoes capable of automatically tightening laces, automatically tightening plastic bras and the like. In the prior art, the automatic tightening of the rope belt is generally realized by arranging a rope belt tightening device with high-efficiency transmission in the wearing product.

A winding shaft is arranged in a common rope belt tightening device with high-efficiency transmission, and the rope belt is wound or unwound through rotation of the winding shaft, so that the rope belt is tightened or loosened. In the prior art, the motor and the worm are matched to drive the winding shaft to rotate, and the motor can generate axial force extending along the axial direction of the worm in the process of driving the worm, and the axial force can increase the friction force between the end face of the worm and the corresponding supporting surface, so that the friction torque of the worm is increased, and the transmission efficiency is reduced. In addition, the spool can also be acted by axial force in the rotating process so that friction torque is generated in the rotating process of the spool and the shell.

Disclosure of Invention

The invention aims to provide a rope belt loosening and tightening device with high-efficiency transmission, which solves the defects in the prior art, can effectively reduce the friction resistance of a worm in the tightening and rotating process, and can effectively improve the transmission efficiency.

The invention provides a rope belt tightening device with high-efficiency transmission, which comprises a base, an upper shell matched with the base, a driving mechanism and a winding shaft, wherein the driving mechanism and the winding shaft are arranged on the base;

the winding shaft is provided with a winding disc and a fluted disc which are used for winding the rope belt; the driving mechanism comprises a motor, a gearbox and a worm, wherein the motor drives the worm to rotate through the gearbox;

the worm is meshed with the fluted disc and drives the wire spool fixedly connected with the fluted disc to rotate;

one end, far away from the gearbox, of the worm is provided with an arc-shaped end head; an axial supporting part matched with the arc-shaped end head is arranged on the upper shell;

when the worm is a right-handed worm, the wire spool is arranged to tighten the rope when rotating clockwise;

when the worm is a left-handed worm, the wire spool is arranged to tighten the rope when rotating anticlockwise;

when the wire spool tightens up the rope and rotates, the biggest curvature position department in the arc-shaped end offsets with axial supporting part.

As a further development of the invention, the arcuate end head has a hemispherical structure.

As a further improvement of the present invention, the spool is rotatably installed between the upper housing and the base;

the winding shaft is also provided with a rotating shaft arranged on the winding disc, and the upper shell is provided with a rotating shaft limiting hole matched with the rotating shaft; the base is provided with a rotation limiting groove matched with the wire spool.

As a further improvement of the invention, a rotating boss which is in rotating fit with the rotating shaft limiting hole is arranged on the rotating shaft, and the rotating boss is arranged at one end of the rotating shaft, which is close to the upper shell; the rotating boss is provided with a hemispherical structure.

As a further improvement of the invention, the rotating shaft limiting hole is in clearance fit with the rotating boss, and the hole depth of the rotating shaft limiting hole is smaller than the height of the rotating boss.

As a further improvement of the invention, a support table for radially supporting the worm is provided on the base.

As a further improvement of the invention, a limiting groove for limiting the swing of the arc-shaped end head is arranged on the upper shell at the position opposite to the supporting table.

As a further development of the invention, the output end of the gearbox is connected to the worm by means of a sliding key.

As a further improvement of the invention, a cross-shaped key pin is arranged on the output end of the gearbox, and a key groove matched with the cross-shaped key pin is arranged on the worm.

As a further improvement of the invention, a limit stop ring is arranged on the worm, the gearbox comprises an outer shell, and a stop ring which is propped against the limit stop ring is arranged on the outer shell.

As a further development of the invention, the gearbox is a compound planetary gearbox.

As a further improvement of the present invention, the gear box includes an outer casing, a planet carrier, a planet wheel rotatably mounted on the planet carrier, a sun gear engaged with the planet wheel, a ring gear engaged with the sun gear, and a gear box base fixing the outer casing, the ring gear being provided on an inner side wall of the outer casing; the motor is fixed on the gearbox base.

As a further improvement of the invention, the planetary gear, the sun gear and the planet carrier are all made of plastics.

As a further improvement of the present invention, the lead angle of the worm is set to 2 ° -6 °.

The wearing product comprises the rope belt elastic device with high-efficiency transmission, the wearing product is provided with a flexible substrate and a rope belt arranged on the flexible substrate, and the rope belt elastic device is matched with the rope belt to carry out tightening or loosening operation on the flexible substrate.

As a further improvement of the invention, the wearing article is a shoe, the flexible base is a shoe body, and the rope belt elastic device is arranged on the shoe body and is matched with the rope belt to tighten or loosen the shoe body.

Compared with the prior art, the end head of the worm is designed to be the arc-shaped end head, so that the contact area between the end face of the worm and the axial supporting part for supporting the end head of the worm is reduced, friction torque formed by the end face of the worm can be reduced, and meanwhile, the rotating direction of the worm with small friction torque is set to be the tightening direction of the wire reel, so that the transmission efficiency in the tightening process can be improved.

Drawings

FIG. 1 is a perspective view of a high efficiency drive belt tensioner according to an embodiment of the present invention;

FIG. 2 is an exploded view of a high efficiency drive belt tensioner according to an embodiment of the present invention;

FIG. 3 is a schematic view of the internal structure of a high-efficiency transmission rope belt tensioner according to an embodiment of the present invention;

FIG. 4 is a cross-sectional view of a high efficiency drive belt tensioner as disclosed in an embodiment of the present invention;

FIG. 5 is a schematic view of the installation structure of a worm in a high-efficiency driven rope belt tightening device according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of the installation structure of the driving mechanism in the rope belt tightening device with high-efficiency transmission according to the embodiment of the invention;

FIG. 7 is a first schematic view of the upper housing of the high-efficiency drive belting apparatus according to the present invention;

FIG. 8 is a second schematic view of the upper housing of the high efficiency drive belting disclosed in the embodiments of the present invention;

FIG. 9 is a schematic view of the base of the high-efficiency drive belt tensioner according to the present invention;

FIG. 10 is a first schematic view of a separator in a high-efficiency drive belt tensioner according to an embodiment of the present invention;

FIG. 11 is a second schematic view of the separator in the high-efficiency drive belt tensioner according to the present invention;

FIG. 12 is an exploded view of the drive mechanism in the high efficiency drive belting disclosed in the present invention;

FIG. 13 is an exploded view of a transmission in a high-efficiency drive belt tensioner in accordance with an embodiment of the present invention;

FIG. 14 is a first schematic structural view of the outer housing of the transmission in the high-efficiency drive belt tensioner of the present invention;

FIG. 15 is a second schematic view of the outer housing of the transmission in the high-efficiency drive belt tensioner of the present invention;

FIG. 16 is a schematic illustration of the structure of a worm in a high efficiency drive belting disclosed in an embodiment of the present invention;

fig. 17 is a schematic diagram of an installation structure of a worm in the high-efficiency driving rope belt tightening device disclosed in the embodiment of the invention when the worm is a right-handed worm;

fig. 18 is a schematic diagram of an installation structure of a worm in the rope belt tightening device with efficient transmission disclosed in the embodiment of the invention when the worm is a left-handed worm;

FIG. 19 is a first schematic view of the shaft of the high-efficiency drive belt tensioner of the present invention;

FIG. 20 is a second schematic view of the shaft of the high-efficiency drive belt tensioner of the present invention;

fig. 21 is a schematic structural diagram of a normally open switch of a switch unit in the rope belt tightening device with efficient transmission disclosed in the embodiment of the invention;

FIG. 22 is a schematic diagram of a switch unit of a rope belt tensioner with high efficiency transmission according to an embodiment of the present invention, which is a normally closed switch;

FIG. 23 is a schematic view showing the installation structure of a switch unit in a rope belt tightening device with high efficiency transmission according to an embodiment of the present invention;

FIG. 24 is a schematic view showing a structure in which two protrusions are provided on a rotating shaft in a rope belt tightening device according to an embodiment of the present utility model;

reference numerals illustrate: 1-an upper shell, 11-a first channel, 12-a top cover, 13-a left side plate, 14-a right side plate, 15-a shell mounting groove, 16-a avoiding hole, 17-a blocking part, 18-a rotating shaft limiting hole, 19-a limiting groove,

2-a base, 21-a positioning column, 22-a rotation limiting groove, 23-an annular boss, 24-a supporting table, 25-a first supporting plate, 26-a second supporting plate,

3-drive mechanism, 31-motor, 32-gearbox, 320-cross key pin,

321-an outer shell, 3211-a gear ring, 3212-a body, 3213-a special-shaped part, 322-a blocking ring,

323-planet carrier, 324-planet gears, 325-sun gear, 326-gearbox foundation,

33-worm, 331-hemispherical end, 332-limit stop ring, 333-keyway,

4-spool, 41-spool, 410-rope threading slot, 411-lightening hole, 42-fluted disc, 43-connecting part, 431-groove, 44-spindle, 441-protruding part, 442-rotating boss,

5-dividers, 50-roping cavities, 51-perforations, 52-second channels, 521-inlets, 522-outlets, 53-top plates, 531-support bosses, 532-relief slots, 54-first side plates, 55-second side plates, 56-locating holes,

6-seal, 7-switch key housing,

8-switch unit, 81-first contact, 811-first contact, 82-second contact, 821-second contact, 83-push block, 84-contact support block,

9-electric control mechanism, 91-power supply and 92-circuit board.

Detailed Description

The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.

Embodiments of the invention: as shown in fig. 1 to 20, a rope belt tightening device with high efficiency transmission comprises a base 2, an upper shell 1 matched with the base 2, a driving mechanism 3 arranged on the base 2 and a winding shaft 4.

As shown in fig. 19 and 20, the spool 4 has a spool 41 for winding a rope, a toothed plate 42 fixedly connected to the spool 41, a connecting portion 43 connecting the spool 41 and the toothed plate 42, and a rotating shaft 44 provided on the spool 41. The driving mechanism 3 drives the wire spool 41 to rotate through the fluted disc 42 to tighten or loosen the rope belt, thereby realizing automatic tightening of the rope belt.

As shown in fig. 12 and 13, the driving mechanism 3 includes a motor 31, a gear box 32, and a worm 33, the motor 31 and the gear box 32 are fixed on the base 2, an output end of the motor 31 is connected to an input end of the gear box 32, the worm 33 is fixed with an output shaft of the gear box 32, and the worm 33 is meshed with the toothed disc 42 to realize driving of the toothed disc 42.

It will be appreciated that the rope tightening device further comprises an electric control mechanism controlling the drive mechanism 3, as shown in fig. 2 and 3, which comprises a power source 91 for powering the motor 31 and a control unit controlling the rotation of the motor 31. The control unit is provided on the circuit board 92, and is electrically connected to the motor 31 and the power source 91. Note that, in the embodiment of the present invention, the motor 31 is a motor capable of achieving both forward rotation and reverse rotation, and the control unit is used to control the rotation direction and the rotation angle of the motor 31. The motor 31 can rotate forward or backward to rotate the spool 4 forward or backward to wind or unwind the rope on the spool 41.

In the embodiment of the invention, the motor 31 is a hollow cup motor, and the hollow cup motor adopts a coreless rotor, so that the volume is small, and the integrated design of the whole structure is facilitated. And the hollow cup has low electric energy loss, and a small power supply can be adopted for supplying power to the hollow cup, so that the volume and the weight of the rope belt tightening device are further reduced, and the applicability of the rope belt tightening device is improved.

As shown in fig. 4, in the present embodiment, the spool 4 is rotatably installed in a cavity between the upper housing 1 and the base 2, and the spool 41 is located between the fluted disc 42 and the base 2, and a first passage 11 communicating the inside and the outside of the cavity is provided at a position of the upper housing 1 close to the base 2 or on the base 2.

As shown in fig. 1-3, the first passage 11 is used for threading the lace, and the lace enters the cavity from the outside through the first passage 11. The first channel 11 may be disposed on the upper housing 1 at a position close to the base 2, or the first channel may be disposed directly on the base 2, and the disposed position of the first channel 11 is determined according to the specific structural shapes of the upper housing 1 and the base 2.

In particular, as shown in fig. 7-8, in the first case, a groove body is provided on the upper case 1, and the base 2 is plugged at the notch position of the groove body to form a cavity. At this time, the upper case 1 is provided with a top cover 12 and left and

right side plates

13, 14, front and rear side plates which are distributed along the circumference of the top cover 12 and perpendicular to the top cover 12. The left side plate 13 and the right side plate 14 are oppositely arranged, the front side plate is an arc plate, the rear side plate is opposite to the front side plate, the left side plate 13, the front side plate, the right side plate 14 and the rear side plate are connected end to end in sequence and form a groove body with an opening facing the base 2 with the top cover 12, and the base 2 is blocked on a notch of the groove body.

The first channel 11 is disposed on the upper housing 1 near the base 2, so that the first channel 11 is opposite to the spool 4, so as to wind the rope belt and the spool 4. Specifically, as shown in fig. 8, there are two first passages 11 provided on the left side plate 13 and the right side plate 14, respectively.

In another embodiment, a slot (not shown) may be disposed on the base 2, where the upper housing 1 is blocked at the slot of the slot, and the first channel 11 is disposed on the base 2, specifically, the base 2 has a bottom plate, and a side plate vertically fixed around the bottom plate, where the side plate and the bottom plate enclose a slot with an opening facing the upper housing 1, and the upper housing 1 is blocked at the slot of the slot, and the first channel 11 is disposed on the side plate of the base 2.

The upper shell 1 is fixedly connected with the base 2, and specifically, the upper shell 1 and the base 2 are fixedly welded by laser welding or ultrasonic welding. The tightness of connection fixation between the connections can be ensured by means of laser welding or ultrasonic welding. In order to avoid the occurrence of welding leakage in the welding process between the upper shell 1 and the base 2, the sealing performance between the upper shell 1 and the base 2 is problematic, and a shell sealing piece is further arranged at the joint between the upper shell 1 and the base 2. The provision of the housing seal member can enhance the sealability between the upper housing 1 and the base 2. In the present embodiment, the housing seal member is an elastomer layer insert-molded on the base 2 toward the housing 1 side, the elastomer layer being provided inside the laser-welded or ultrasonic-welded portion. The material of the elastomeric layer may be TPU, TPE, TPV, EVA, PU, EPDM, NBR, SR or the like.

As shown in fig. 4, 19 and 20, in the embodiment of the present invention, a first end of the spool 4 is rotatably mounted on the upper housing 1, and a second end of the spool 4 is rotatably mounted on the base 2. Specifically, a first end of the rotating shaft 44 is integrally formed on the spool 41, and a second end of the rotating shaft 44 is rotatably mounted on the upper housing 1. The second end of the rotary shaft 44 is provided with a rotary boss 442. The rotating boss 442 is integrally formed on the rotating shaft 44, a rotating shaft limiting hole 18 adapted to the rotating boss 442 is arranged on the inner side wall of the upper housing 1, and the rotating shaft limiting hole 18 is arranged on the top cover 12. The rotation boss 442 is clearance fit with the rotation shaft limiting hole 18 such that the rotation boss 442 can rotate within the rotation shaft limiting hole 18.

As shown in fig. 9, the base 2 is provided with a rotation limiting groove 22 adapted to the wire spool 41, and the wire spool 41 rotates in the rotation limiting groove 22. The rotation limiting groove 22 is actually a groove body formed in the middle of an annular boss 23 arranged on the base 2. The annular boss 23 limits the spool 41 so that the spool 41 rotates in the rotation limiting groove 22. The embodiment of the invention realizes that the winding shaft 4 is rotatably arranged between the upper shell 1 and the base 2 under the action of the rotation limiting groove 22 and the rotation limiting hole 18.

In order to facilitate the winding of the strap around the spool 41 in the embodiment of the present invention, a strap threading groove 410 penetrating the spool 41 is provided on the spool 41, and the strap threading groove 410 extends in the radial direction of the spool 41. The rope threading groove 410 is located opposite to the first passage 11. The string is threaded through the first passage 11 and positioned in the string threading groove 410, and wound around the spool 41 as the spool 41 rotates. It is of course also possible to fix the strap directly to the spool 41, but fixing the strap directly to the spool 41 does not facilitate adjustment of the strap. The position of the rope on the spool 41 can be conveniently adjusted by providing the rope threading groove 410 on the spool 41.

In order to further realize the weight reduction of the rope belt tightening device, as shown in fig. 20, the spool 41 may further be provided with weight reducing holes 411, and the weight reducing holes 411 are provided with four in total and are symmetrically distributed on both sides of the rope belt threading slot 410. The symmetrical arrangement of the lightening holes 411 can prevent the spool 41 from being deflected during rotation.

According to the embodiment of the invention, the winding shaft 4 is rotatably arranged in the cavity formed by the upper shell 1 and the base 2, so that the winding shaft 4 and the driving mechanism 3 are covered in the upper shell 1 at the same time, and the whole rope belt tightening device only uses one complete shell. Compared with the structure that a shell is independently arranged for a winding shaft in the prior art, the production and use cost of the shell is saved, the assembly efficiency of the whole rope belt tightening device is improved, the integration of the whole structure is facilitated, the volume can be reduced, and the rope belt tightening device is applied to a smaller space. Meanwhile, the integration of the shell is favorable for sealing and waterproofing.

As shown in fig. 3 and 4, after the base 2 is installed and fixed, the driving mechanism 3 has a height difference between the output shaft of the gearbox 32 and the base 2 due to a larger volume of the gearbox 32, and the worm 33 is fixed to the output shaft of the gearbox 32, so that the worm 33 is in an overhead state after being installed and fixed, and a certain gap exists between the worm 33 and the base 2 after the worm 33 is overhead. In the prior art, since the worm 33 is overhead, in order to match the fluted disc 42 with the worm 33, the fluted disc 42 needs to be lifted to the same height as the worm 33, and the structural arrangement of the lifted fluted disc 42 occupies a large space, which is not beneficial to the integrated design of the housing.

Referring to fig. 4, in the embodiment of the present invention, the spool 41 is disposed between the toothed disc 42 and the base 2, that is, the toothed disc 42 on the spool 4 is disposed at a position away from the base 2, so that the toothed disc 42 is lifted up by the spool 41 to facilitate engagement of the toothed disc 42 with the worm 33 to be raised. While facilitating placement of the spool 41. At this time, a gap exists between the worm 33 and the base 2, and the spool 41 is opposite to the gap, so that the rope is threaded through the gap to effectively utilize the gap, thereby facilitating the integrated design of the rope tightening device.

As shown in fig. 2-11, the base 2 is further provided with a partition 5, the partition 5 divides the cavity into an electric control cavity and a rope winding cavity 50, and the driving mechanism 3 is arranged in the electric control cavity. A roping chamber 50 is provided between the partition 5 and the base 2, and communication between the roping chamber 50 and the first channel 11 is performed through a second channel 52.

The electric control mechanism 9 is further arranged in the electric control cavity, and because of the existence of the electric control mechanism 9, the waterproof requirement of parts in the electric control cavity is high, and the cavity where the wire spool 41 is located is required to be communicated with the outside through the first channel 11 so as to facilitate the threading of the rope, so that the space where the wire spool 41 is located cannot be sealed. If the chamber in which the electric control mechanism 9 is located is the same chamber as the chamber in which the spool 41 is located, it is difficult to effectively seal the electric control mechanism 9. According to the embodiment of the invention, the electric control cavity in which the electric control mechanism 9 is positioned is independently separated by the separation of the separation plate 5, so that the sealing and the water prevention of the electric control cavity are conveniently realized.

In order to ensure the sealing in the electric control cavity, the side wall of the partition 5 comprising the second channel 52 is attached to the side wall of the upper shell 1 comprising the first channel 11, so that the first channel 11 is directly communicated with the second channel 52, and the rope entering the first channel 11 directly enters the rope winding cavity 50 through the second channel 52, thereby isolating the connecting channel between the first channel 11 and the electric control cavity, and playing an important role in waterproof sealing in the electric control cavity. A sealing element can be arranged between the two to further seal the water-proof sealing.

In the implementation of the present invention, as shown in fig. 4, the fluted disc 42 and the wire spool 41 are disposed on two sides of the partition 5 along the up-down direction, and the electric control chamber covers the upper side of the partition 5. The partition 5 is provided with a perforation 53 which communicates the rope winding cavity 50 with the electric control cavity; the connecting portion 43 between the fluted disc 42 and the wire spool 41 on the wire spool 4 is arranged in the through hole 53 in a penetrating way.

In this embodiment, the toothed disc 42 of the spool 4 and the wire spool 41 are further separated into two different cavities by the separating member 5, and the toothed disc 42 is meshed with the driving mechanism 3, so that the toothed disc 42 is disposed in the electric control cavity where the driving mechanism 3 is located, and the wire spool 41 is disposed in the rope winding cavity 50. Since the bobbin 4 is partitioned by the partition 5, the bobbin 4 must be inserted through the partition 5, and the partition 5 must be provided with a hole 53 through which the bobbin 4 is inserted. Specifically, as shown in fig. 10, the connection portion 43 on the spool 4 is inserted into the through hole 53. Since the presence of the perforations 53 breaks the integrity of the partition plate 5, the perforation 53 locations need to be sealed when the electrical control chamber is sealed. Therefore, a seal ring is provided between the connecting portion 43 and the inner side wall of the through hole 53. As shown in fig. 20, in order to facilitate the installation and fixation of the seal ring, a groove 431 for placing the seal ring is provided on the connection portion 43, and the groove 431 is opposite to the inner side wall of the through hole 51 (fig. 4). Here, although a seal ring is provided between the connecting portion 43 and the inner wall of the through hole 51, the seal ring does not prevent the rotation of the spool 4 in the through hole 51.

In addition, the toothed disc 42 and the wire spool 41 are separated into two different chambers, so that the rope belt can be further prevented from being wound on the toothed disc 42 in the process of winding on the wire spool 41.

Of course, in other embodiments, the spool 41 and the fluted disc 42 of the spool 4 may be disposed in the rope winding cavity 50, the motor 31 and the gearbox 32 of the driving mechanism 3 are disposed in the electric control cavity, and the worm 33 of the driving mechanism 3 penetrates the partition plate 5 to extend in the rope winding cavity to be matched with the fluted disc 42. The rope winding cavity 50 separated by the separation plate 5 is communicated with the electric control cavity through the hole penetrated by the worm 33, and the hole is only required to be sealed in the process of sealing and waterproofing the electric control cavity. But in this way separation of the spool 41 and the toothed disc 42 is not possible.

In the preferred embodiment of the present invention, the spacer 5 is a single component independent of the base 2, and the spacer 5 is clamped between the upper case 1 and the base 2, and the spacer 5 is pressed against the base 2 by the pressing force generated by the upper case 1 after the upper case 1 is fixedly connected to the base 2. In another embodiment, the separating element 5 can of course also be integrally fastened to the base 2. In order to ensure the tightness of the connection of the spacer 5 to the base 2, as shown in fig. 4, a sealing member 6 is provided at the connection of the spacer 5 to the base 2, the sealing member 6 being an elastomer layer insert-molded on the base 2 on the side facing the spacer in this embodiment. The material of the elastomeric layer may be TPU, TPE, TPV, EVA, PU, EPDM, NBR, SR or the like. Of course, the use of the sealing element 6 can be avoided if the separating element 5 is provided integrally on the base 2.

In the embodiment of the invention the roping chamber 50 is a groove provided in the partition 5, which groove is provided on the opposite side of the partition 5 from the base 2, as shown in fig. 10-11. Specifically, the partition 5 is provided with a top plate 53 and first, second, third, and

fourth side plates

54, 55, which are connected perpendicularly to the top plate 53. The first side plate 54 and the second side plate 55 are located opposite to each other, and the first side plate 54 and the second side plate 55 are disposed on opposite sides of the top plate 53, respectively. The first side plate 54, the second side plate 55, the third side plate and the fourth side plate are connected in sequence in an end-to-end manner. The rope winding cavity 50 is a cavity surrounded by a top plate 53, a first side plate 54, a second side plate 55, a third side plate and a fourth side plate, and the opening faces the base 2. The electric control chamber is covered above the partition 5, and the through hole 51 is provided on the top plate 53. The second passages 52 are provided in total in two, and the two second passages 52 are provided on the first side plate 54 and the second side plate 55, respectively.

As shown in fig. 4 and 10, a supporting boss 531 is further disposed on the top plate 53, the supporting boss 531 is disposed along the edge of the through hole 51, the supporting boss 531 plays a supporting role on the fluted disc 42, after the fluted disc 42 is supported by the supporting boss 531, the contact area between the fluted disc 42 and the supporting boss 531 is limited to the top surface of the supporting boss 531, so that the contact area between the fluted disc 42 and the top plate 53 is reduced, friction between the fluted disc 42 and the top plate 53 in the rotation process can be effectively reduced, and the transmission efficiency can be improved. Correspondingly, an avoidance groove 532 may be further formed on the top plate 53, the avoidance groove 532 surrounds the outer edge of the supporting boss 531, and the avoidance groove 532 is formed to prevent the plane where the supporting boss 531 is located from being higher than the plane where the top plate 53 is located, but to support the fluted disc 42 in the same manner. Such an arrangement can effectively reduce the thickness of the entire housing.

In the embodiment of the invention, the upper shell 1 is actually covered outside the partition 5, the partition 5 is placed in a groove formed in the upper shell 1, the first side plate 54 is attached to the left side plate 13, the second side plate 55 is attached to the right side plate 14, so that the rope belt entering the first channel 11 directly enters the rope winding cavity 50 through the second channel 52, and the connecting channel between the first channel 11 and the electric control cavity is blocked, thereby playing an important role in waterproof sealing in the electric control cavity.

As shown in fig. 9 and 11, in order to facilitate the installation and positioning of the spacer 5, a positioning column 21 is provided on the base 2, and a positioning hole 56 adapted to the positioning column 21 is provided on the spacer 5. The mounting and positioning of the partition 5 are conveniently realized by the cooperation of the positioning posts 21 and the positioning holes 56.

As shown in fig. 4, a space formed between the outer wall of the wire reel 41 and the inner wall of the wire winding chamber 50 is a receiving space for a string wound around the wire reel 41. The size of the receiving space determines the length of the winding rope and thus the number of turns to be rotated to a limit position during the rotation of the spool 4, which will be described in detail below.

In the embodiment of the invention, the partition 5 is mounted on the base 2, and the rope winding cavity 50 formed by the partition 5 and the base 2 is directly communicated with the outside through the second channel 51 and the first channel 11. The perforation 51 that supplies connecting portion 43 to wear to establish is provided on the partition piece 5, this perforation makes its sealedly through the setting of sealing washer, and owing to also set up the sealing washer between partition piece 5 and the base 2, make in the wiring chamber 50 only can be connected with the external world through first passageway 11 and second passageway 52 like this, thereby make automatically controlled chamber and external completely separate, effectively prevented the water in the wiring chamber from entering into automatically controlled intracavity, and owing to weld through laser welding or ultrasonic welding between base 2 and the last casing 1 can effectually prevent that water from entering into automatically controlled intracavity from the hookup location between base 2 and the last casing 1, and then effectively guaranteed automatically controlled intracavity waterproof. The rope belt tightening device disclosed by the embodiment of the invention has good tightness. Meanwhile, the rope belt tightening device has compact structure and high integration, and improves the applicability of the rope belt tightening device.

As shown in fig. 2, the rope belt tightening device further comprises a switch key housing 7, and a housing mounting groove 15 matched with the switch key housing 7 is arranged on the upper housing 1. The switch key shell 7 is provided with a switch button, the switch button is used for triggering a circuit on the circuit board, an instruction for tightening or loosening is sent to the control unit, and the control unit is combined with the position of the winding shaft again according to the instruction to control the driving mechanism 3 to rotate. For facilitating the installation and fixation of the switch key housing 7, a housing installation groove 15 is provided on the upper housing 1 to install and fix the switch key housing 7. The shell mounting groove is an avoidance groove excavated on the upper shell 1 in the 15 th century, and the avoidance groove enables the situation that the switch key shell 7 and the upper shell 1 are not overlapped in thickness to appear, so that the reduction of the volume of the rope belt tightening device is facilitated. The upper shell 1 is provided with a switch hole which is positioned in the shell mounting groove 15 and is the mounting position of a switch button. The presence of the switch hole causes a disruption of the tightness of the housing, in order to guarantee the tightness of the switch key housing 7, the switch key housing 7 is provided with elastomer keys which are insert-molded in the housing mounting groove 15. The material of the elastomeric key may be TPU, TPE, TPV, EVA, PU, EPDM, NBR, SR, etc.

In the embodiment of the present invention, as shown in fig. 1, 2, 14 and 15, the transmission 32 includes an outer case 321, and the outer case 321 includes a body 3212 and a profiled portion 3213 provided outside the body 3212; the body 3212 is annular, the special-shaped portion 3213 is sleeved outside the body 3212, and the special-shaped portion 3213 is matched with the upper shell 1 in shape. Further, in order to avoid the volume increase of the rope belt tightening device generated by overlapping the outer casing 321 of the gearbox 32 and the casing of the upper casing 1, the upper casing 1 is provided with a avoiding hole 16 opposite to the gearbox 32, the shape of the special-shaped portion 3213 is adapted to the avoiding hole 16, and the side wall of the special-shaped portion 3213 is attached to the wall of the avoiding hole 16. The presence of the escape hole 16 directly exposes the surface of the shaped portion 3213 of the outer case 321 facing the escape hole 16, and thus the problem of an increase in volume due to the superposition of the thickness of the outer case 321 of the transmission case 32 and the thickness of the upper case 1 can be avoided.

The exposed housing portion of the gearbox 32 is limited to a certain extent, which would otherwise cause an increase in the thickness of the belt tensioner. The upper surface of the profiled portion 3213 of the transmission 32 and the upper surface of the upper case 1 are located on the same plane. The outer housing 321 of the gearbox 32 is adapted to the shape of the corresponding location on the outer housing 1. The same provision of the relief hole 16 breaks the sealability of the upper case 1, and in order to solve the above-described problem, a transmission seal is provided between the wall of the relief hole 16 and the profiled portion 3213. The gearbox seal may also be an elastomer layer insert injection molded onto the upper housing 1. The material of the elastomeric layer may be TPU, TPE, TPV, EVA, PU, EPDM, NBR, SR or the like.

In the embodiment of the present invention, the worm 33 is used for driving the fluted disc 42 to rotate, the motor 31 drives the worm 33 through the gearbox 32, one end of the worm 33 is connected with the output end of the gearbox 32, and the second end of the worm 33 abuts against the axial supporting part 17 (fig. 5) arranged on the upper casing 1. The worm 33 generates an axial force along the axial direction thereof during the transmission process, specifically, as shown in fig. 17, when the worm 33 is a right-handed worm, the worm rotates clockwise to generate an axial force driving the worm 33 to move toward the axial support portion 17, and when the worm rotates counterclockwise to generate an axial force driving the worm 33 to move toward the gearbox 32. The clockwise and counterclockwise direction of the worm 33 in this embodiment is referenced to the orientation of the worm 33 in the figures of the drawings 16-18 of the specification. As shown in fig. 18, when the worm 33 is a left-handed worm, an axial force is generated to drive the worm 33 to move in the direction of the transmission case 32 when the worm rotates clockwise, and an axial force is generated to drive the worm 33 to move in the direction of the axial support 17 when the worm rotates counterclockwise.

In order to prevent the axial force from affecting the transmission of the transmission shaft of the gearbox 32, as shown in fig. 12, the output shaft of the gearbox 32 is connected with the worm 33 through a sliding key, and a certain sliding can be realized between the worm 33 and the output shaft of the gearbox 32 through the sliding key connection, so that the transmission of the axial force generated by the worm 33 in the rotation process to the gearbox 32 is slowed down. Specifically, the output end of the gearbox 32 is provided with a cross-shaped key pin 320, and the worm 33 is provided with a key groove 330 adapted to the cross-shaped key pin 320. The cross key pin 320 is inserted into the key groove 330, the cross key pin 320 and the key groove 330 can slide upwards, and the force transmission of torque during the rotation of the driving worm 33 is more uniform by adopting the cross key pin 320.

In order to further avoid the transmission of the axial force on the worm 33 to the transmission shaft of the gearbox 32, a limiting stop ring 332 is further arranged on the worm 33, and the limiting stop ring 332 is a circle of boss arranged along the circumferential direction of the worm 33. Correspondingly, a blocking ring 322 corresponding to the limiting baffle ring 332 is arranged on the outer shell 321 of the gearbox 32, the blocking ring 322 is propped against the limiting baffle ring 332 by the axial force driving the worm 33 to move towards the direction close to the gearbox 32, and the axial force is transmitted to the outer shell 321 after the blocking ring 322 is propped against the limiting baffle ring 332, so that the axial force on the worm 33 is effectively prevented from being transmitted to the rotating shaft of the motor 31 through the transmission shaft of the gearbox 32.

The axial support 17 is adapted to receive axial forces generated during rotation of the worm 13. Friction exists between the end face of the worm 33, against which the worm 33 abuts against the axial support 17, and the axial support 17, thereby increasing the friction moment of the worm 33, which can cause a reduction in efficiency during transmission. In this embodiment, in order to improve the efficiency of the transmission of the worm 33, the end of the worm 33 remote from the gearbox 32 is provided as a curved end 331, and the curved end 331 is abutted against the axial support 17 at the position of maximum curvature. The above-described design reduces the contact area between the arc-shaped end 331 and the axial support 17, which reduces the friction torque applied to the worm 33, thereby contributing to an improvement in the transmission efficiency of the worm 33.

As mentioned above, the form and rotation of the worm 33 have an effect on the direction of the axial force generated by the worm 33, which forces the tip of the worm 33 against the axial support 17 or against the blocking ring 322 of the gearbox 32. When the axial force urges the tip of the worm 33 against the stopper ring 322, the friction force between the stopper ring 322 and the stopper ring 332 is inconvenient to decrease, whereas when the axial force urges the tip of the worm 33 against the axial support 17, the friction force between the tip of the worm 33 and the axial support 17 can decrease.

Therefore, when the axial force generated in the rotation direction of the worm 33 drives the rotation direction in which the tip of the worm 33 abuts against the axial support portion 17 for tightening the rope belt, the transmission efficiency can be effectively improved. Because the moment required during tightening of the rope is large, a corresponding small friction moment is required during transmission of the worm 33. While the friction moment between the faces of the axial support 17 and the end contact of the worm 33 can be effectively reduced. Defining the direction of rotation of the tip of the axial force-driven worm 33 against the axial support 17 as the direction of tightening the lace can thus effectively improve the transmission efficiency.

Specifically, as shown in fig. 17, when the worm 33 is a right-handed worm, the worm 33 is rotated clockwise to satisfy the above requirement, and the worm 33 is disposed on the right side of the toothed plate 42. When the worm 33 is a left-handed worm, as shown in fig. 18, the counterclockwise rotation of the worm 33 also satisfies the above requirement, and the worm 33 is disposed on the left side of the toothed plate 42. When the worm 33 is a right-handed worm, the toothed disc 42 engaged with the worm 33 is rotated clockwise at this time, and thus, the direction in which the spool 41 is rotated clockwise is defined as the direction in which the webbing is tightened. When the worm 33 is a left-hand worm, the toothed disc 42 is rotated counterclockwise at this time, and thus the direction in which the spool 4 is rotated counterclockwise is defined as the direction in which the rope belt is tightened. It should be noted here that both the clockwise rotation and the counterclockwise rotation of the spool 4 are described in terms of the orientation of the spool 4 shown in fig. 17 and 18.

The design of the above structure enables the worm 33 to be subjected to smaller friction moment in the process of tightening the rope belt, thereby improving the moment in the process of tightening the rope belt and improving the transmission efficiency.

When the worm 33 is a right-handed worm, the spool 4 is also subjected to an axial force in its axial direction, which tends to move the spool 4 in a direction approaching the upper housing 1, due to the meshing transmission of the worm 33 with the toothed disc 42, when the worm 33 rotates clockwise.

When the worm 33 is a left-hand worm, the spool 4 is also subjected to an axial force in its axial direction, which tends to move the spool 4 in a direction approaching the upper housing 1, when the worm 33 rotates counterclockwise.

The axial forces generated in the two modes make the rotating boss 442 on the rotating shaft 44 prop against the upper casing 1, specifically, the rotating boss 442 and the upper casing 1 prop against the hole bottom (fig. 18) of the rotating shaft limiting hole 18, and at this time, the hole depth of the rotating shaft limiting hole 18 needs to be smaller than the height of the rotating boss 442. Therefore, the rotating boss 442 is designed as an arc-shaped end, so that the position with the maximum curvature on the arc-shaped end is propped against the upper shell 1, and the contact area between the rotating boss 442 and the upper shell 1 is reduced, so that the friction moment generated in the rotating process of the rotating boss 442 is reduced, and the efficiency in the rope winding process is further improved. Further rotational bosses 442 may also be provided in a hemispherical configuration.

Further, as shown in fig. 5, in order to better support the worm 33, the base 2 is further provided with a support table 24 for supporting the radial direction of the worm 33, and the worm 33 is lapped on the support table 24. The support stand 24 may be a separate protrusion provided on the base 2. As a preferred solution, as shown in fig. 3, the support stand 24 is provided on the top plate 53 of the partition plate 5 in this embodiment, and the integration of the support stand 24 on the partition plate 5 can effectively reduce the occupation of the volume.

Further, as shown in fig. 5, a limiting groove 19 is provided on the upper housing 1 opposite to the supporting table 24 to limit the swing of the arc-shaped end 331. The limit groove 19 further plays a limiting and supporting role on the end part of the worm 33 far away from the gearbox 32, and swing in the rotation process of the worm 33 can be better avoided. The limit groove 19 is arranged on the groove body on the upper shell 1.

The arc-shaped tip 331 of the preferred embodiment of the invention has a hemispherical configuration. The hemispheric structure is designed to further reduce friction between the arc-shaped tip 331 and its contact surface.

In order to better achieve self-locking of the worm 33 in the embodiment of the present invention, the lead angle of the worm 33 is set between 2 ° -6 °.

21-23, the rope belt tightening device in the embodiment of the invention further comprises a travel control mechanism matched with the winding shaft, wherein the travel control mechanism comprises a switch unit 8 and a control unit electrically connected with the switch unit 8 and the driving mechanism 3;

as shown in fig. 19, the rotary shaft 44 is provided with a boss 441 extending in the radial direction of the rotary shaft 44, and when the boss 441 rotates to be opposite to the position of the switch unit 8, the switch unit 8 responds, and the control unit controls the driving mechanism 3 in accordance with the response of the switch unit 8.

The switching unit 8 is used to record the number of turns of the rotation shaft 44, and thus to reflect the number of turns of the winding shaft 4. In this embodiment, the protruding portion 441 is provided with one, so that the switching unit 8 responds once every rotation of the rotating shaft 44 and transmits the response to the control unit, and the control unit obtains whether the motor 31 is rotating forward or rotating backward at this time, and can know the number of turns of the winding shaft 4 rotating forward and the number of turns of rotating backward according to the above data. The number of turns of the spool 4 can be related to the length of the wound or unwound rope.

In the embodiment of the present invention, it is necessary to determine an initial position, which records the initial state of the spool, and rotate the spool 4 with the initial state as the initial position. For better counting the number of turns of the spool 4, the initial position is set to the position where the boss 441 first activates the switch unit 8. Setting the initial position at the position where the boss 411 triggers the switch unit 8 can conveniently realize statistics of the number of turns, because the initial position is a position point where the switch unit 8 responds, the winding shaft 4 can be conveniently returned to the initial position according to the response times. In the actual installation process, the protruding portion 441 may be at an arbitrary position at the beginning, and before the rope is threaded on the spool 41, the protruding portion 441 is turned to set the position where the protruding portion first triggers the switch unit 8 as an initial position, at this time, the control unit records the response of the switch unit 8, and after determining the initial position, the rope is threaded on the spool 41.

Here, the winding shaft 4 starts to rotate forward from the initial position to tighten, the switching unit 8 is triggered once every rotation of the winding shaft 4 during the rotation, the switching unit 8 transmits the triggering signal of the time to the control unit, and the control unit can determine how many turns of the winding shaft 4 are tightened according to the steering condition of the motor 31 and the response condition of the switching unit 8. When the rope belt is required to be loosened after the tightening state is reached, the control unit controls the motor 31 to reversely rotate again, and the number of times of reversely rotating the winding shaft 4 is also determined according to the response times so as to enable the winding shaft 4 to return to the initial position. For example, if the motor 31 rotates forward from the initial position to tighten the rope belt, the control unit receives signal feedback twice during rotation, which means that the spool rotates at least two times, the control unit needs to control the motor to rotate in the reverse direction when the rope belt is loosened and stops rotating back to the initial position when receiving signal feedback from the three switching units. According to the embodiment of the invention, the number of turns of the winding shaft 4 is converted into the response times of the switch unit 8, and the structure is simpler and the use is more convenient according to the response control of the rotation condition of the winding shaft 4.

In the process of winding the rope belt by rotating the spool 4 from the initial position, since the length of the rope belt is limited and the accommodating space for accommodating the rope belt wound on the spool 4 is limited, the spool 4 cannot rotate in the tightening direction infinitely, so that excessive tightening of the rope belt is caused, and the rope belt is blocked in the accommodating space by continuing to tighten the rope belt when the accommodating space for accommodating the rope belt on the spool 41 is full. Thus, the spool 4 has a limit number of turns during tightening, which is used to indicate the maximum number of turns the spool 4 is allowed to rotate.

The limit number of turns is determined according to the size of the receiving space, the length of the string, the diameter of the string, and the diameter of the spool 41. The size of the receiving space is the size of the space between the outer diameter of the wire spool 41 and the inner side wall of the wire winding chamber 50. The larger the diameter of the spool 41, the more the length of the strap is wound one turn. The larger the diameter of the rope belt is, the larger the space of the accommodating space occupied by winding the rope belt for one circle is. The number of limit turns is determined in particular according to the actual requirements and can be realized by a person skilled in the art without further elaboration here.

The design of above-mentioned structure is through setting up the bellying in the pivot, and the bellying rotates with control switch unit response along with the pivot, and the response of switch unit has instructed the spool to rotate one round each time, and switch unit is with this response data transmission to control unit, and control unit is according to this response data in order to adjust actuating mechanism's rotation to can avoid the spool to rotate extreme position and control spool to relax initial position. The rope belt tightening device is simple in structure and reduces the cost of the rope belt tightening device.

In the prior art, the number of turns of the winding shaft 4 is determined through the results of an encoder and the like, the results are complex, the assembly cost is high, the embodiment of the invention adopts the cooperation of the switch unit 8 and the protruding part 441 on the rotating shaft 44 to realize the counting of the number of turns of the winding shaft 4, the cam 441 is triggered to respond to the switch unit 8 after rotating for one turn to record the rotation, and the limit position of the rotation of the winding shaft 4 can be further obtained through the accurate recording of the number of turns, so that the rotation of the winding shaft is convenient to adjust. In order to achieve a smooth response of the control switch unit 8 by the boss 441, the boss 441 is a cam provided on the rotating shaft 44.

The above embodiment describes the case where one projection 441 is provided on the rotary shaft 44, and in this state, the rotary shaft 44 rotates one turn to make the switch unit 8 correspond one time. In order to more accurately record the rotation position of the spool 4, in another embodiment, as shown in fig. 24, two protrusions 441 are provided on the rotating shaft 44, the two protrusions 441 are symmetrically provided on both sides of the rotating shaft 44, and the protruding directions of the two protrusions 44 are 180 degrees different. So that the shaft 44 triggers the response of the switching unit 8 twice during one rotation. The accuracy is better with respect to the half turn when determining the rotational position of the spool 4 than with respect to one turn. It should be noted that the number of the protruding portions 441 may be four or three, and the protruding portions 441 need to be uniformly distributed along the circumferential direction of the rotating shaft 44.

Specifically, the switch unit 8 includes a first contact 81 and a second contact 82, and the first contact 81 and the second contact 82 interact to respond under the action of the protruding portion 441.

The switch unit 8 may be a normally open switch or a normally closed switch, as shown in fig. 21, in which the first contact 81 and the second contact 82 are disposed at a distance, and when the protruding portion 441 rotates to be opposite to the first contact 81, the protruding portion 441 drives the first contact 81 to elastically deform to engage with the second contact 82. The switch unit 8 responds when the first contact 81 is in contact with the second contact 82.

In order to facilitate the elastic deformation of the first contact 81, the switch unit 8 further includes a pushing block 83 that facilitates the protrusion 441 to push the elastic deformation of the first contact 81, where the pushing block 83 is fixed on the first contact 81, and the pushing block 83 is disposed opposite to the rotating shaft 44. A gap exists between the pushing block 83 and the rotating shaft 44, and when the protruding portion 441 of the rotating shaft 44 rotates to the position of the pushing block 83, the first contact piece 81 is driven to elastically deform so as to be combined with the second contact piece 82.

In order to facilitate the bonding of the first contact 81 and the second contact 82, the first contact 81 is provided with a first contact portion 811 protruding in the direction of the second contact 82. The second contact piece 82 is provided with a second contact portion 821 protruding in the direction of the first contact piece 81, and the first contact portion 811 is located opposite to the second contact portion 821. The bonding between the first contact portion 811 and the second contact portion 821 is achieved first during the elastic deformation of the first contact piece 81.

In this embodiment, the first contact 81 and the second contact 82 are attached, and when the protruding portion 441 rotates to be opposite to the second contact 82, the protruding portion 441 drives the second contact 82 to elastically deform to separate from the first contact 81, so as to achieve a response to the protruding portion 441.

In this embodiment, a pushing block 83 is fixed on the second contact 82, so that the protruding portion 441 pushes the second contact 82 to elastically deform, and the pushing block 83 is disposed opposite to the rotating shaft 44. The protrusion 441 rotates to a position of the pushing block 83 to push the second contact 82 to be elastically deformed to be separated from the first contact 81.

In order to facilitate the threading of the rope, the initial position is usually set such that the rope threading groove 410 on the spool 41 is opposite to the first channel 11, so that the protruding direction of the protruding portion 441 is consistent with the penetrating direction of the rope threading groove 410 in this embodiment, and the pushing block 83 is correspondingly disposed directly above the penetrating direction of the first channel 11, so that the rope threading groove 410 is opposite to the first channel 11 when the protruding portion 441 is located at the initial position.

In the present embodiment, the first contact 81 and the second contact 82 are electrically connected to the control unit, and in order to achieve stability of the first contact 81 and the second contact 82 during use, the first contact 81 and the second contact 82 are fixed on the contact support block 84 at a distance, and the contact support block 84 is fixed on the upper case 1. The contact supporting block 84 plays a supporting role on the first contact 81 and the second contact 82, a mounting fixing column is arranged on the specific contact supporting block 84, and a mounting fixing groove buckled with the mounting fixing column is arranged on the upper shell 1.

The motor 31 is usually connected to the worm 33 via a gearbox 32 for better driving of the worm 33. The gear box 32 in the prior art is mostly a parallel shaft gear box, and the transmission of the parallel shaft gear box is not compact due to the internal structure, the transmission process is not stable, so that the abrasion between gears is large, and therefore, the materials of the gears are usually selected from metals. The use of metal gears not only results in increased costs but also increases the weight of the gearbox. In order to further reduce the cost of parts, the embodiment of the invention further improves the gearbox.

Specifically, the transmission adopts a planetary transmission, as shown in fig. 13, the transmission 32 comprises an outer shell 321 and a planetary transmission mechanism arranged in the outer shell 321, the planetary transmission mechanism comprises a planet carrier 323, a plurality of planet gears 324 rotatably arranged on the planet carrier 323, a sun gear 325 meshed between the plurality of planet gears 324 and a gear ring 3211 meshed with the planet gears 324; the ring gear 3211 is provided on an inner side wall of the outer case 321. In the embodiment of the invention, the body 3212 is annular, and the gear ring 3211 is arranged on the inner side wall of the body 3212.

The motor 31 is arranged parallel to the base 2, the gearbox 32 further comprises a gearbox base 326, the outer shell 1 and the motor 31 are fixed on two sides of the gearbox base 326, and an output shaft of the motor 31 penetrates through the gearbox base 326 to be connected with the planetary transmission mechanism. The output shaft of the specific motor 31 is fixedly connected with the sun gear 325.

The gearbox base 326 is in this embodiment fixed to the outer casing 1 by means of a laser welded connection. The tightness between the two can be ensured by laser welding connection and fixation.

In the embodiment of the present invention, three planetary gears 324 are provided, and a sun gear 325 is installed at a position opposite to the center position of the carrier 323, and the sun gear 325 is engaged with each of the three planetary gears 324. The motor 31 is fixedly connected with the sun gear 325, the motor 31 drives the sun gear 325 to rotate, the sun gear 325 drives the planet gears 324, and the planet gears 324 and the gear ring 3211 move relatively, so that the planet carrier 323 is driven to rotate. The output of the gearbox 32 is arranged on a planet carrier 323, and the output of the gearbox 32 is connected with a worm 33 to realize transmission control of the worm 33.

In the embodiment of the present invention, the planetary gears 324, the sun gear 325 and the planet carrier 323 are all made of plastic. Because the planetary gears are adopted for transmission, the uniform load performance is good in the rotating process, and the abrasion between the gears is low. In view of the characteristics, the plastic gear with weaker bearing capacity can also meet the use requirement, and the processing technology of the plastic gear can be batch injection molding, so that the cost of product parts and assembly is reduced.

As a further optimization, the planetary gear box is a compound planetary gear box. Two sets of planetary transmission mechanisms are arranged in the compound planetary transmission case.

The transmission with planetary gears requires a small enough gearbox volume, in this embodiment the maximum outer diameter of the ring gear 3211 of the outer housing is 8-10mm. Correspondingly, the modulus of the planetary transmission 323 is 0.15-0.2. The design of the structure can conveniently realize the integrated design of the gearbox, and is beneficial to the reduction of the volume.

Further, in order to facilitate the installation of the rope belt tightening device with high efficiency transmission on the wearing article, the two sides of the base 2 are symmetrically provided with a first supporting plate 25 and a second supporting plate 26. The first support plate 25 and the second support plate 26 are respectively used for connecting and fixing with the wearing article.

The embodiment of the invention also discloses a wearing product, which is provided with a flexible substrate and a rope belt arranged on the flexible substrate, wherein the rope belt elastic device is matched with the rope belt to tighten or loosen the flexible substrate.

The wearable product can be a shoe, the flexible substrate is a shoe body, and the rope belt is arranged on the shoe body in an elastic mode and matched with the rope belt to tighten or loosen the shoe body. The shoe further comprises a sole, and the shoe body is arranged on the sole.

Preferably, the rope belt elastic device is arranged at the tongue position of the shoe body. Of course, the rope belt tightening device can be placed at the sole position due to the smaller structure.

In addition, the rope belt tightening device can be applied to wearing products such as underwear or schoolbags.

While the foregoing is directed to embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.

Claims

1. A rope belt tightening device with high-efficiency transmission comprises a base, an upper shell matched with the base, a driving mechanism arranged on the base and a winding shaft;

The method is characterized in that: one end, far away from the gearbox, of the worm is provided with an arc-shaped end head; an axial supporting part matched with the arc-shaped end head is arranged on the upper shell; the winding shaft is rotatably arranged between the upper shell and the base;

the winding shaft is also provided with a rotating shaft arranged on the winding disc, and the upper shell is provided with a rotating shaft limiting hole matched with the rotating shaft; the base is provided with a rotation limiting groove matched with the wire spool; the base is provided with a supporting table for radially supporting the worm; a limiting groove for limiting the arc-shaped end head to swing is formed in the upper shell at the position opposite to the supporting table;

a rotating boss in rotating fit with the rotating shaft limiting hole is arranged on the rotating shaft, and the rotating boss is arranged at one end, close to the upper shell, of the rotating shaft; the rotating boss is provided with a hemispherical structure; the arc-shaped end head is provided with a hemispherical structure;

When the axial force generated in the rotation direction of the worm drives the rotation direction of the end head of the worm, which is propped against the axial supporting part, to tighten the rope;

when the worm is a right-handed worm and rotates clockwise, the spool is subjected to an axial force in the axial direction of the worm, and the axial force tends to move the spool in a direction approaching the upper housing;

when the worm is a left-hand worm, the spool receives an axial force in its axial direction when the worm rotates counterclockwise, which tends to move the spool in a direction approaching the upper housing.

2. The high-efficiency driven rope belt tightening device according to claim 1, wherein the rotating shaft limiting hole is in clearance fit with the rotating boss, and the hole depth of the rotating shaft limiting hole is smaller than the height of the rotating boss.

3. The high-efficiency transmission rope belt tightening device according to claim 1, wherein the output end of the gearbox is connected with the worm through a sliding key.

4. A rope belt tightening device with efficient transmission as recited in claim 3, wherein a cross key pin is provided at an output end of the gearbox, and a key slot adapted to the cross key pin is provided on the worm.

5. The efficient drive rope belt tightening device according to claim 1, wherein a limit stop ring is arranged on the worm, the gearbox comprises an outer shell, and a stop ring propped against the limit stop ring is arranged on the outer shell.

6. The high-efficiency drive rope belt tensioner of claim 1, wherein the gearbox is a compound planetary gearbox.

7. The high-efficiency drive rope belt tensioner of claim 6, wherein the gearbox comprises an outer housing, a planet carrier, planet gears rotatably mounted on the planet carrier, a sun gear engaged with the planet gears, a ring gear engaged with the sun gear, and a gearbox base for fixing the outer housing, the ring gear being disposed on an inner sidewall of the outer housing; the motor is fixed on the gearbox base.

8. The high-efficiency drive rope belt tightening device according to claim 7, wherein the planetary gear, the sun gear and the planet carrier are all made of plastic.

9. The high-efficiency drive rope belt tightening device according to claim 1, characterized in that the lead angle of the worm is set to 2 ° -6 °.

10. A wearing article comprising the high efficiency transmission lace tightening device of any one of claims 1-9, said wearing article having a flexible substrate and a lace disposed on said flexible substrate, said lace tightening device cooperating with said lace to tighten or loosen said flexible substrate.

11. The wearing article of claim 10, wherein: the wearing article is a shoe, the flexible substrate is a shoe body, and the rope belt elastic device is arranged on the shoe body and is matched with the rope belt to tighten or loosen the shoe body.