CN112412314B

CN112412314B - Lifting turner of variable-spacing louver

Info

Publication number: CN112412314B
Application number: CN202011310945.5A
Authority: CN
Inventors: 张一飞; 许辉文
Original assignee: Hangzhou Vpitch Technology Co ltd
Current assignee: Hangzhou Vpitch Technology Co ltd
Priority date: 2020-11-20
Filing date: 2020-11-20
Publication date: 2022-11-11
Anticipated expiration: 2040-11-20
Also published as: CN112412314A

Abstract

The invention provides a lifting turner of a variable-pitch blind window, wherein blades of the blind window are connected with a first ladder belt and a second ladder belt which are used for adjusting the pitch and the inclination angle of the blades, the lifting turner of the variable-pitch blind window comprises a lifting winding wheel, a variable-pitch turner, a switcher and a base with a central support and a right support, the lifting winding wheel, the variable-pitch turner and the switcher are coaxially arranged on the base, the first ladder belt and the second ladder belt are connected on the variable-pitch turner, a lifting rope used for drawing and unfolding the blades of the blind window is wound on the lifting winding wheel, the switcher is in transmission connection with the lifting winding wheel and the variable-pitch turner, a locking mechanism is arranged in the switcher, and the locking mechanism can enable the switcher to convert the power input between the lifting winding wheel and the variable-pitch turner. The invention can lead the lifting turner to have more reasonable and compact structure, eliminate the appearance defect that the lifting rope is far away from the ladder belt, and lead the connection of the ladder belt and the variable-spacing winding wheel to be changed into convenience.

Description

Lifting turner of variable-spacing louver

Technical Field

The present invention relates to a louver blade control device, and more particularly, to a lift turner of a variable-pitch louver.

Background

The switching of the folding and unfolding of the blades of the shutter and the turnover of the blades is realized by the friction sliding of the ladder belt and the rope winder or the torsion spring between the lifting winding wheel and the turnover winding wheel of the rope winder, and the switching mode has a defect that the blades are always in an inclined state in the folding and unfolding processes of the blades of the shutter, so that the lifting rope and the perforated edges of the blades are always in a friction state and are quickly worn until being broken; in order to overcome the defect, the blades can be always kept in a horizontal state in the folding and unfolding processes, friction between a lifting rope and the edge of a blade perforation is reduced, even friction is avoided, and abrasion of the lifting rope can be prevented; however, the crank limiting rod is used for pushing the lever, the displacement of the crank limiting rod is difficult to push the lever to be separated from the planet carrier cam, and the lever is difficult to reset, the utility model with the publication number of CN203361999U provides another mechanism for pushing the lever by the crank limiting rod, and the defects are still not effectively solved, therefore, the invention with the publication number of CN103388445B adopts a screw rope winder, a slide block is used for replacing the lever, the slide block is pushed to be separated from the planet carrier cam by driving the nut to axially move through the rotation of the screw rod, and the new solution also has a defect that the nut is gradually locked on the wall surface of a support of a base in the process of pushing the slide block to be separated from the planet carrier cam, so that the thread abrasion and the tooth slippage of the nut and the screw rod are easily caused, and the initial positions of the nuts on the screw rod rope winders at the two ends of the top rail of the shutter are inaccurately determined, so that the two ends are uneven when the bottom rail is lifted when the blade is folded; the publication number is CN105604467B, a cam cover with a reset torsion spring is arranged on the outer side of a lifting winding wheel, a lever mechanism is removed, a slider mechanism is introduced, the cam cover is driven by a crank limiting rod, the cam cover pushes the slider to unlock, when the lifting winding wheel rotates reversely, the reset torsion spring drives the cam cover to reset, and meanwhile, the slider also resets under the pushing of a spiral reset spring; the scheme and other crank and swing rod locking schemes have a common defect that the lifting rope is far away from the ladder belt of the control blade, and the appearance is poor except that the ladder belt cannot be restrained; the publication number CN106320954B proposes a slider mechanism which is not easy to lock a nut on a wall surface of a support to cause thread sliding and circumferentially lock a screw, but the contact between a circumferential projection of the screw and the slider depends on the thread pitch of the screw, because the thread pitch is generally very small, the contact surface between the circumferential projection of the screw and the slider is very small, which often causes the failure of the locking mechanism; the invention has a common characteristic that the swing rod with a V-shaped return spring arranged on the side surface locks the reverse rotation of the inner ring teeth, the swing rod is pressed by a planet wheel carrier connected with a variable-pitch turner to release the locking of the inner ring teeth, and because the swing rod is too long and the friction contact surface with the wall surface is larger, the inner ring teeth fixedly connected with the screw rod are locked and simultaneously extruded by the inner ring teeth to cause the failure of the locking mechanism; publication number CN205955615U discloses a connection mode of a variable-pitch winding wheel and a ladder belt, namely the variable-pitch winding wheel is separated into an inner ring and an outer ring, the inner ring is nested with a hollow shaft, the outer ring and the ladder belt rotate for an angle after being connected with the top of a variable-pitch overturning cylinder to ensure that the front ladder belt and the rear ladder belt are tangent to the peripheral groove of the variable-pitch winding wheel, and the outer ring and the inner ring are connected into the whole variable-pitch winding wheel through the bottom of the overturning cylinder by screws.

Disclosure of Invention

The invention provides a lifting turner of a variable-spacing blind window, which not only can provide a solution of a locking mechanism with a more compact structure, so that the lifting turner has a more reasonable and compact structure, but also can eliminate the appearance defect that a lifting rope is far away from a ladder belt, and in addition, the connection mode of the variable-spacing rolling wheel and the ladder belt is improved, so that the connection change of the ladder belt and the variable-spacing rolling wheel is simple and convenient.

The technical scheme of the invention is as follows: the utility model provides a lift turner of variable-pitch shutter, even have first ladder area and the second ladder area that is used for adjusting blade interval and inclination on the blade of shutter, this lift turner of variable-pitch shutter is including promoting the reel, become the pitch turner, the switch with have the support of centering, the base of right branch seat, promote the reel, become pitch turner and switch coaxial arrangement on the base, first ladder area and second ladder area are even on becoming the pitch turner, it has the lifting rope that is used for drawing in, expandes the shutter blade to coil on the promotion reel, the switch is connected with promotion reel and the transmission of variable-pitch turner, be equipped with locking mechanical system in the switch, locking mechanical system can make the switch change promote the reel and become the power input between the pitch turner. The pitch and pitch of the blades can be changed by a variable pitch turner. The lifting rope can be retracted and extended through the lifting reel so as to fold and unfold the blades of the shutter. The locking mechanism is arranged in the switcher, so that the lifting turner is more compact in structure.

Preferably, the switcher comprises a first-stage planetary gear clutch and a second-stage planetary gear clutch, the locking mechanism comprises a cam locking mechanism and a sliding block locking mechanism, the first-stage planetary gear clutch is in transmission connection with the lifting winding wheel and the second-stage planetary gear clutch, the second-stage planetary gear clutch is in transmission connection with the variable-pitch turner and the cam locking mechanism, the lifting winding wheel and the variable-pitch turner are located between the first-stage planetary gear clutch and the second-stage planetary gear clutch, the cam locking mechanism is located between the lifting winding wheel and the variable-pitch turner, two ends of the sliding block locking mechanism respectively correspond to the lifting winding wheel and the second-stage planetary gear clutch, the cam locking mechanism can be separated from the lifting winding wheel and can lock the lifting winding wheel in a one-way mode when the variable-pitch turner rotates in a reverse direction, and the sliding block locking mechanism can lock the second-stage planetary gear clutch and can unlock the second-stage planetary gear clutch under the driving of the lifting winding wheel. Through the structural configuration, when the switcher is operated, the power output of the switcher is interfered by the cam locking mechanism and the sliding block locking mechanism, and the function of switching on and switching off the working power between the lifting reel and the variable-pitch turner by the switcher is realized.

Preferably, the primary planetary gear clutch comprises a primary sun gear, a primary planetary gear, a primary planet gear carrier and primary inner ring teeth on the end face of the lifting reel, the primary planetary gear is arranged on the primary planet gear carrier and surrounds the primary sun gear, and the primary planetary gear is externally engaged with the primary sun gear and is simultaneously internally engaged with the primary inner ring teeth on the end face of the lifting reel. The power input from the first-stage sun gear can drive the lifting rolling wheel to reversely rotate through the inner meshing of the first-stage planetary gear and the first-stage inner ring gear on the end face of the lifting rolling wheel, the lifting rope wound on the lifting rolling wheel is released to descend and unfold the blades folded in the louver, the first-stage planetary gear carrier connected with the locked second-stage planetary gear clutch is static at the moment, when the lifting rolling wheel completely unfolds the blades of the louver, the lifting rolling wheel is locked, the second-stage planetary gear clutch is unlocked at the moment, the power input from the first-stage sun gear can be transmitted to the second-stage planetary gear clutch through the first-stage planetary gear carrier connected with the hollow tube, and then the variable-pitch turner and the cam locking mechanism are driven to work.

Preferably, the second-stage planetary gear clutch comprises a second-stage inner ring gear, a second-stage sun gear, a second-stage planetary gear and a second-stage planetary gear carrier, the second-stage planetary gear is externally meshed with the second-stage sun gear and is internally meshed with the second-stage inner ring gear, the second-stage sun gear is in transmission connection with the first-stage planetary gear carrier through a hollow tube, and a locking notch capable of forming locking fit with the sliding block locking mechanism and a limiting convex block capable of being clamped with the base are arranged on the periphery of the second-stage planetary gear carrier. The second-stage planetary gear clutch moves after receiving power transmitted by the first-stage sun gear through the hollow tube, the locking notch and the sliding block locking mechanism form locking fit, when the limiting convex block and the base form clamping connection, the second-stage planetary gear carrier cannot rotate, the second-stage planetary gear clutch is locked, and the second-stage planetary gear clutch stops working.

Preferably, the cam locking mechanism comprises an annular cam, an annular sliding block and an annular sliding block return spring, the annular cam and the annular sliding block are of a sleeve structure, the annular sliding block is circumferentially static, the annular sliding block return spring is located between the annular sliding block and a centered support, the annular cam comprises an annular step and a cam barrel, the annular step and the cam barrel are provided with a pair of radially staggered annular cam outer wall convex blocks, the outer wall of the annular sliding block is provided with a pair of symmetrical annular sliding block outer wall convex blocks, the end face of the annular sliding block is provided with a pair of symmetrical end ratchets capable of being engaged with the lifting winding wheel, and the inner wall of the annular sliding block is provided with a pair of radially staggered inner wall convex blocks capable of being abutted against the annular cam outer wall convex blocks. When the outer wall convex block of the annular cam is abutted against the inner wall convex block, the annular sliding block overcomes the elastic force of the return spring to be separated from the annular cam, and the end part ratchet is not contacted with the lifting winding wheel. When the annular cam rotates along with the second-stage planetary gear clutch and rotates relative to the annular sliding block, the convex block on the outer wall of the annular cam is staggered with the convex block on the inner wall of the annular cam, axial repulsive force between the annular cam and the annular sliding block disappears, the annular sliding block resets under the action of the return spring of the annular sliding block, and the end ratchet can be wedged into a matching structure in the lifting winding wheel, so that unidirectional locking is formed on the lifting winding wheel, and the lifting winding wheel can only rotate in a unidirectional mode.

Preferably, the lifting winding wheel comprises a left half wheel, a right half wheel, a pin shaft and a U-shaped swing rod, the left half wheel and the right half wheel are fixedly connected into a whole, the end of a lifting rope is connected between the left half wheel and the right half wheel through the pin shaft, the U-shaped swing rod is hinged between the left half wheel and the right half wheel, the free end of the U-shaped swing rod in a sagging state is abutted to the sliding block locking mechanism, and a pair of sector notches capable of being embedded into the end part ratchets is arranged on the right half wheel. When the lifting rope is wound, the U-shaped swing rod is folded and retracted; when the lifting rope is completely unfolded, the U-shaped swing rod restores the overturning function and can be abutted against the sliding block locking mechanism to stir the sliding block locking mechanism to move so as to unlock the secondary planetary gear clutch. When the ratchet at the end part is embedded into the sector notch of the right half wheel, the one-way locking of the cam locking mechanism to the lifting winding wheel is realized.

Preferably, the opposite end surfaces of the left half wheel and the right half wheel are respectively provided with a fan-shaped groove, and the U-shaped swing rod is turned in the fan-shaped grooves. The groove wall of the sector groove can support the U-shaped swing rod, so that force can be stably applied in the process that the U-shaped swing rod pulls the sliding block locking mechanism.

Preferably, the sliding block locking mechanism comprises a first sliding block, a first return spring, a second sliding block and a second return spring, the first sliding block and the second sliding block are connected to the base in a sliding mode and correspond to the lifting winding wheel and the second-stage planetary gear clutch respectively, the first return spring is located between the first sliding block and the base, the second return spring is located between the second sliding block and the base, the head end of the second sliding block is semicircular, the tail end of the second sliding block is provided with a step, the waist of the first sliding block is provided with a notch matched with the head end of the second sliding block, and the first sliding block is driven by the lifting winding wheel and drives the second sliding block to slide. Under a natural state, the first return spring and the second return spring respectively push the first sliding block and the second sliding block to return to the original point, the head end of the second sliding block is sunk into a notch of the waist part of the first sliding block, and the step at the tail end of the second sliding block is clamped in a locking notch of the secondary planet gear carrier to lock the secondary planet gear clutch; when the U-shaped swing rod stirs the first sliding block, the first sliding block slides and forces the second sliding block to slide through the thrust between the notch of the waist part of the first sliding block and the head end of the second sliding block so as to move the tail end step out of the locking notch, thereby unlocking the secondary planetary gear clutch.

Preferably, the variable-interval turning device comprises a variable-interval rolling wheel, a variable-interval turning cylinder, an intermittent mechanism and a hollow shaft, wherein a pair of fan-shaped openings are formed in the variable-interval rolling wheel, the variable-interval rolling wheel is embedded with the hollow shaft through a central key slot hole, the two upper ends of the first ladder belt penetrate through the bottom of the base and surround the variable-interval turning cylinder to be fixedly connected with the top of the variable-interval turning cylinder, the two upper ends of the second ladder belt penetrate through the bottom of the base and surround the turning device to enter the top opening of the variable-interval turning cylinder, and then arc-shaped pressing blocks fixed between the two fan-shaped openings on the variable-interval rolling wheel are respectively fixed in the two fan-shaped openings. Such ladder belt connected mode easy operation, labour saving and time saving.

Preferably, the arc-shaped pressing block is fixed between the two fan-shaped openings on the variable-pitch rolling wheel through screws. When fixed second ladder area upper end, only need through dismouting screw, loading and unloading arc briquetting can be accomplished, the simple operation.

The invention has the beneficial effects that:

the cam locking mechanism is arranged in the space between the lifting reel and the variable-interval turner, so that an external swing rod locking mechanism can be omitted, and the technical defects of dispersed original structure and overlarge volume are overcome.

One-level planetary gear clutch through with two-stage planetary gear clutch settles in the one side of promotion winding wheel, second grade planetary gear clutch settles in the promotion winding wheel with the opposite side of becoming interval turner, make the elevator rope be close to the ladder area of control blade, the outward appearance of shutter obtains very big improvement, restraint between elevator rope and the ladder area also becomes easier simultaneously, in addition, also make the elevator rope and the ladder area of shutter can install in the guide rail of both sides, make the rope of shutter no longer reveal.

When the lifting winding wheel directly pushes the first sliding block to move through the U-shaped oscillating bar, the freedom degree of movement of the U-shaped oscillating bar is more restricted, the U-shaped oscillating bar is not easy to deviate and dislocate, and the reliability of the whole sliding block locking mechanism is more guaranteed.

Drawings

FIG. 1 is a three-dimensional assembly view of the lift tumbler of the present variable pitch blind and a partial sectional view of the slider locking mechanism in a locked state and the cam locking mechanism in an unlocked state;

FIG. 2 is a front right three-dimensional exploded view of the lift flipper of the present variable pitch blind;

FIG. 3 is a rear right three-dimensional exploded view of the lifting and inverting device of the variable pitch blind;

FIG. 4 is a front right three-dimensional exploded view of a lifting roller of the lifting tumbler for variable pitch blinds;

FIG. 5 is a rear right three-dimensional exploded view of a lifting roller in the lifting and inverting device of the variable pitch blind;

FIG. 6 is a front right three-dimensional exploded view of the cam locking mechanism of the lift flipper of the present variable pitch blind;

FIG. 7 is a rear right three-dimensional exploded view of the cam locking mechanism of the lift tumbler of the present variable pitch blind;

FIG. 8 is a schematic structural view of a slider locking mechanism in the lifting tumbler of the present pitch blind;

FIG. 9 is a schematic structural view of another perspective of the slider locking mechanism in the lifter-flipper of the present variable pitch blind;

FIG. 10 is a cross-sectional view of the connection between the variable pitch winding wheel and the ladder tape of the lifting and turning device of the variable pitch blind;

FIG. 11 is an axial view of the relationship between the lift roller of the lift tumbler of the present variable pitch blind and the slider 52 of the slider lock mechanism.

FIG. 12 is a three-dimensional relationship and a partial cross-sectional view of the slider locking mechanism of the lift-tilt mechanism of the present variable pitch blind, with only the components in locking relationship retained, in a locked state;

FIG. 13 is a three-dimensional relationship and a partial sectional view of the lift-tilt mechanism of the present variable pitch blind, wherein only the slider locking mechanism of the member having a locking relationship is retained in the locked state, and the cam locking mechanism is in the unlocked state;

FIG. 14 is a three-dimensional relationship and a partial cross-sectional view of the lift tumbler of the present variable pitch blind with the slider locking mechanism of only the elements in locking relationship in an unlocked state;

fig. 15 is a three-dimensional relationship and a partial sectional view between the unlocked state of the slider lock mechanism and the locked state of the cam lock mechanism of the lifter/flipper of the variable pitch blind, in which only the members having the locked relationship are retained.

Detailed Description

The invention is further illustrated by the following specific embodiments in conjunction with the accompanying drawings.

Example (b):

the utility model provides a lift turner of variable-pitch shutter, even have the second ladder area 81 that is used for adjusting blade interval and inclination on the blade of shutter, the first ladder area 80 that is used for adjusting the blade slope, this lift turner of variable-pitch shutter includes promotion reel 1, become interval turner 2, switch 3 and have support 44 between two parties, base 6 of right support 45, promotion reel 1, become interval turner 2 and switch 3 coaxial arrangement on base 6, first ladder area 80, second ladder area 81 are connected on becoming interval turner 2, it has the lifting rope 7 that is used for drawing in, expanding the blade to coil on the promotion reel 1, switch 3 is connected with promotion reel 1 and the transmission of variable interval turner 2, be equipped with locking mechanical system in the switch 3, locking mechanical system can make switch 3 change the operating power between promotion reel 1 and the variable interval turner 2. The variable pitch inverter 2 controls horizontal pitch and inversion of the blades of the variable pitch blind. The variable-spacing turner 2 comprises a variable-spacing winding wheel 21, a variable-spacing turning cylinder 22, an intermittent mechanism 23 and a hollow shaft 24, the variable-spacing winding wheel 21, the variable-spacing turning cylinder 22 and the intermittent mechanism 23 are respectively provided with a central inner hole, the central inner hole of the variable-spacing winding wheel 21 is set to be a key slot hole, two upper ends of a first ladder tape 80 penetrate through the bottom of the base 6 and then surround the variable-spacing turning cylinder 22 and are fixedly connected to the top of the first ladder tape, two upper ends of a second ladder tape 81 penetrate through the bottom of the base 6 and then surround the turning cylinder 22 and enter from the top opening of the turning cylinder to be connected with the top of the variable-spacing winding wheel 21, and 4 key slots 241 are formed in the outer surface of the hollow shaft 24. The lifting winding wheel 1 comprises a left half wheel 11, a right half wheel 12, a first bearing 14, a sealing cover 15, a second bearing 16, a pin shaft 13 and a U-shaped swing rod 17, wherein the left half wheel 11 and the right half wheel 12 are respectively provided with a central inner hole and can be assembled and fixedly connected into a whole, the end 71 of the lifting rope 7 is connected between the left half wheel 11 and the right half wheel 12 through the pin shaft 13, the U-shaped swing rod 17 is hinged between the left half wheel 11 and the right half wheel 12, the free end 171 of the U-shaped swing rod 17 in a drooping state is abutted to the sliding block locking mechanism 5, the outer end face of the right half wheel 12 is provided with a pair of fan-shaped notches 125, and the outer end face of the left half wheel 11 is fixedly provided with a one-level inner ring gear 115. The inner side of the left half wheel 11 is provided with a left pin shaft hole 111, a left sector groove 112 with a left sector groove wall 1121, and a left notch 113, the center of the inner side of the left half wheel 11 is further provided with a cylindrical boss 114 with teeth and a central hole, and the outer peripheral surface of the left half wheel 11 has an annular step structure and is provided with a pair of bosses 116. The outer side of the right half wheel 12 is provided with a cylindrical boss 124 which is provided with a pair of symmetrical fan-shaped notches 125, the inner side of the right half wheel 12 is provided with a right pin shaft hole 121, a right fan-shaped groove 122 with a right fan-shaped groove wall 1221 and a right notch 123 which correspond to the left half wheel, and the right half wheel 12 is also provided with a central hole 126 with a key groove; the cover 15 is a thin circular cover with a flange, and a pair of cover gaps 151 are arranged at the flange. The U-shaped swing link 17 is turned in the sector groove formed by the left sector groove 112 and the right sector groove 122. The switcher 3 comprises a first-stage planetary gear clutch and a second-stage planetary gear clutch, the first-stage planetary gear clutch is in transmission connection with the second-stage planetary gear clutch, the locking mechanism comprises a cam locking mechanism 4 and a sliding block locking mechanism 5, the lifting winding wheel 1 and the variable-pitch turner 2 are located between the first-stage planetary gear clutch and the second-stage planetary gear clutch, the cam locking mechanism 4 is located between the lifting winding wheel 1 and the variable-pitch turner 2, two ends of the sliding block locking mechanism 5 respectively correspond to the lifting winding wheel 1 and the second-stage planetary gear clutch, the first-stage planetary gear clutch is in transmission connection with the lifting winding wheel 1, the second-stage planetary gear clutch is in transmission connection with the variable-pitch turner 2 and the cam locking mechanism 4, the cam locking mechanism 4 can be in clutch connection with the lifting winding wheel 1 and in unidirectional locking, and the sliding block locking mechanism 5 can lock the second-stage planetary gear clutch and can unlock the second-stage planetary gear clutch under the driving of the lifting winding wheel 1. The primary planetary gear clutch comprises a primary sun gear 311, six primary planetary gears 312, a primary planet carrier 313, primary inner ring teeth 115 on the end face of the lifting winding wheel 1 and a hollow pipe 314. The first-stage planetary gear 312 is externally engaged with the first-stage sun gear 311 and is simultaneously internally engaged with the first-stage inner ring teeth 115 on the end surface of the lifting reel 1, open grooves 3141 are arranged at two ends of the hollow pipe 314, the open groove 3141 at one end of the hollow pipe 314 is inserted into a central key hole of the first-stage planetary gear carrier 313, and the other end of the hollow pipe is in transmission connection with the second-stage planetary gear clutch. And the power input end of the shutter lifting turner is arranged on the first-stage planetary gear clutch, and the power input end of the shutter lifting turner is a square central hole of the first-stage sun gear 311. The secondary planetary gear clutch is positioned at one end of a right support 45 of the base 6 and comprises a secondary inner ring gear 321, a secondary sun gear 322, six secondary planetary gears 323 and a secondary planetary gear carrier 324, wherein the secondary inner ring gear 321, the secondary sun gear 322, the six secondary planetary gears 323 and the secondary planetary gear carrier 324 are fixedly arranged on the end surface of the right support 45, a central key hole of the secondary sun gear 322 is inserted into an open groove 3141 at the other end of the hollow tube 314 and is in transmission connection with the primary planetary gear carrier 313 through the hollow tube 314, and a locking notch 3241 which can form locking fit with the sliding block locking mechanism 5 and a limiting bump 3242 which can be clamped with the base 6 so as to stop the rotation of the secondary planetary gear carrier 324 are arranged on the periphery of the secondary planetary gear carrier 324. The cam locking mechanism 4 comprises an annular cam 41, an annular sliding block 42 and an annular sliding block return spring 43, the annular sliding block 42 is static in the circumferential direction, the annular sliding block return spring 43 is positioned between the annular sliding block 42 and a centering support 44, the annular cam 41 is a step sleeve with a spline groove central hole 413, the annular cam 41 comprises an annular step 411 and a cam cylinder 412, a pair of annular cam outer wall lugs 414 which are staggered in the radial direction are arranged at the junction of the annular step 411 and the cam cylinder 412, the annular sliding block 42 is a sleeve structure with a sealing cover 422, the sealing cover 422 of the annular sliding block 42 is provided with a central hole 426 which is matched with the cam cylinder 412 of the annular cam 41, the outer wall of the sealing cover 422 of the annular sliding block 42 is provided with circular holes for arranging the four annular sliding block return springs 43, the inner wall of the sliding block cylinder 421 of the annular sliding block 42 is nested with the annular step 411 of the annular cam 41, the outer wall of the sliding block cylinder 421 of the annular sliding block 42 is provided with a pair of symmetrical annular sliding block outer wall convex blocks 423, the end surface of the annular sliding block 42 is provided with a pair of symmetrical end ratchets 424 which can be embedded into the fan-shaped notches 124 and enable the annular sliding block 42 to be jointed with the lifting winding wheel 1, one end of each end ratchets 424 is an inclined surface, the other end of each end ratchets 424 is a radial plane which is coplanar with the axis of the annular sliding block, the inner wall of the sliding block cylinder 421 of the annular sliding block 42 is provided with a pair of inner wall convex blocks 425 which are radially staggered and can be abutted against the annular cam outer wall convex blocks 414 of the annular cam 41, one side of the central support 44 is provided with a sleeve 441 with a sealing cover, the inner side of the sealing cover of the central support 44 is provided with a round hole 443 for accommodating the annular sliding block return spring 43, the inner wall of the sleeve 441 of the centering support 44 is fitted with the outer wall of the slider cylinder 421 of the annular slider 42 and is provided with a pair of sliding grooves 442 fitted with the annular slider outer wall projections 423 of the annular slider 42. The sliding block locking mechanism 5 comprises a first sliding block 52, a first return spring 53, a second sliding block 54 and a second return spring 55, the first sliding block 52 and the second sliding block 54 are slidably connected to the base 6 and respectively correspond to the lifting reel 1 and the two-stage planetary gear clutch, the first return spring 53 is located between the first sliding block 52 and the side wall surface of the base 6, the second return spring 55 is located between the second sliding block 54 and the end wall surface of the base 6, the head end 541 of the second sliding block 54 is semicircular, the tail end of the second sliding block 54 is provided with an end step 542, the waist of the first sliding block 52 is provided with a waist notch 521 matched with the head end of the second sliding block 54, the first sliding block 52 is driven by the lifting reel 1, the tail end of the first sliding block 52 is provided with a barb 522 capable of preventing the U-shaped swing rod 17 from falling off when pushing the first sliding block 52, and a circular cavity 523 capable of accommodating the first return spring 53, and the tail end of the second sliding block 54 is provided with a circular cavity 543 capable of accommodating the second return spring 55. The variable-pitch winding wheel 21 is provided with a pair of sector-shaped openings 212, the variable-pitch winding wheel 21 and the hollow shaft 24 are embedded together through a key slot matching structure, and two upper ends 811 of the second ladder tape 81 are respectively fixed in the two sector-shaped openings 212 through an arc-shaped pressing block 211 fixed between the two sector-shaped openings 212. A screw hole 213 is arranged between the two fan-shaped openings 212, the arc-shaped pressing block 211 is fixed between the two fan-shaped openings 212 on the variable-pitch rolling wheel 21 by a screw 214 screwed on the screw hole 213, the upper end 811 of the second ladder tape 81 is knotted or forms a bead in other modes, then passes through the lower opening of the base 6 and enters the two fan-shaped openings 212 of the variable-pitch rolling wheel 21 from the top opening of the variable-pitch turning cylinder 22 around the variable-pitch turning cylinder 22, the upper end of the second ladder tape 81 is respectively pressed in the cavity formed by the arc-shaped pressing block 211 and the two fan-shaped openings 212 of the variable-pitch rolling wheel 21 by the arc-shaped pressing block 211, and the arc-shaped pressing block 211 is fixed on the variable-pitch rolling wheel 21 by the screw 214, so that the two upper ends 811 of the second ladder tape 81 cannot fall off from the variable-pitch rolling wheel 21.

The installation sequence of the lifting turner of the variable-pitch louver is as follows: inserting a boss rotating shaft 114 of a left half wheel 11 of a lifting reel 1 into a center hole 126 with a key groove of a right half wheel 12, inserting two ends 173 of a U-shaped swing rod 17 into a pin hole 111 of the left half wheel 11 and a pin hole 121 of the right half wheel 12 of the lifting reel 1 in the process, penetrating a pin shaft 13 into a head rope sleeve 71 of a lifting rope 7 after the lifting reel 1 is assembled, pressing two ends of the pin shaft 13 into a left notch 113 and a right notch 123 of the lifting reel 1, fixing the head rope sleeve 71 of the lifting rope on the lifting reel rotating shaft 114, as shown in fig. 4, 5 and 11, then sleeving a bearing 14 onto an outer cylindrical boss 124 of the right half wheel 12, assembling a primary sun wheel 311, a primary planet gear 312, a primary planet carrier 313 and a primary inner ring gear 115 on the left half wheel 11 together to form a primary planet gear clutch, then sleeving a sealing cover 15 onto the left half wheel 11, embedding a pair of notches 151 of the sealing cover 15 and a pair of bosses 151 on the left half wheel 11 into a pair of bosses 116, sleeving a bearing 15 onto a support seat 116, and then sleeving the bearing 15 onto a central base 6, namely a support seat 44; the hollow shaft 24 sequentially passes through the intermittent gear set 23, the variable pitch turning cylinder 22, the variable pitch winding wheel 21, the centering support 44, the annular slider 42, the annular cam 41 and the lifting winding wheel 1, one end of the hollow shaft 24 is embedded with a grooved central hole of the secondary planet wheel carrier 324, the other end of the hollow shaft 24 is arranged on the centering support 44 and sequentially embedded with a spline central hole 211 of the variable pitch winding wheel 21 and a spline central hole 413 of the annular cam 41; assembling the second-stage sun gear 322, the second-stage planetary gear 323 and the second-stage planetary gear carrier 324 which are positioned at the other sides of the lifting reel 1 and the variable pitch turner 2 and the second-stage inner ring gear 321 on the right support 45 together to form the second-stage planetary gear clutch, penetrating the hollow pipe 314 through the hollow shaft 24, embedding the open slot 3141 at one end of the hollow pipe 314 with the grooved central hole of the planetary gear carrier 313 of the first-stage planetary gear clutch, embedding the open slot 3141 at the other end of the hollow pipe 314 with the central hole of the second-stage sun gear 322 of the second-stage planetary gear clutch, then sequentially arranging the first sliding block 52 and the second sliding block 54 in the bottom slot of the base 6, and finally placing the lifting reel 1, the variable pitch turner 2 and the switcher 3 on the base 6 and fixing the same to form the lifting turner I.

The locking and unlocking operation mechanism of the lifting turner of the variable-pitch blind window is as follows: when the blades of the louver are folded at the top of the window, the lifting roller 1 restrains the U-shaped swing rod on the rotating shaft 114 of the lifting roller 1, under the action of the first return spring 53 and the second return spring 55, the head end 541 of the second slider is in a fit state with the waist notch 521 of the first slider 52, and the end step 542 at the tail end of the second slider is clamped at the locking notch 3241 of the second-stage planetary carrier 324, that is, the variable pitch tilter 2 connected with the second-stage planetary carrier 324 through the hollow shaft 24 and the second-stage sun gear 322 and the first-stage planetary carrier 313 connected through the hollow pipe 314 are locked, as shown in fig. 12 and 13; when the slats of the blind are gradually lowered, the lifting cords 7 are lowered by driving the primary sun wheel 311 to rotate in the direction of the arrow shown in fig. 2 and 3, and the lift roller 1 is rotated in the opposite direction, see fig. 12 and 13, and the primary sun wheel 311 is driven to rotate in the direction of the arrow shown in fig. 2 and 3 until the lifting cords 7 wound on the lift roller 1 are exhausted, so that the U-shaped rocker 17 is rotated under its own weight until its rocker arm 172 is held against, see fig. 11 and 14, by the left sector wall 1121 of the left sector 112 on the left half wheel 11 and the right sector wall 1221 of the right sector 122 on the right half wheel 12, and when the lift roller 1 is rotated further in the direction of the arrow shown in fig. 2 and 3, a left fan-shaped groove wall 1121 and a right fan-shaped wall 1221 of the lifting reel are abutted against the rocker arm 172 of the U-shaped swing rod 17 and abutted against the barb 522 of the first slider 52 through the free end 171 of the U-shaped swing rod so as to overcome the elastic force of the first return spring 53 to push the first slider 52 to slide against the wall surface of the base 6, so that the lifting reel 1 stops rotating, as shown in fig. 11 and 14, at this time, the first slider 52 overcomes the spring force of the second return spring 55 to push the semicircular head of the second slider 54 from the bottom of the waist notch 521 to the edge of the waist notch 521, so that the other end 542 of the second slider 54 is separated from the locking notch 3241 of the secondary planet carrier 324, and thus the locking of the variable pitch reel 21 of the variable pitch turner 2 connected with the secondary planet carrier 324 is released, as shown in fig. 14 and 15; when the variable pitch winding wheel 21 rotates along the secondary planet wheel carrier 324 in the direction of the arrow shown in fig. 15, the ring cam 41 also synchronously rotates in the same direction, the outer wall convex block 414 of the ring cam 41 slides down along the inclined plane of the inner wall convex block 425 of the ring slide block 42 and gradually converges together (see fig. 15) to cancel the axial thrust on the ring slide block, the ring slide block 42 extends the end ratchet 424 into the fan-shaped notch 125 on the cylindrical boss 124 of the right half wheel 12 of the lift winding wheel 1 under the pushing force of the return spring 43 of the ring slide block, so that the lift winding wheel 1 cannot rotate in the direction of the end ratchet 424 of the ring slide block 42, when the variable pitch winding wheel 21 and the ring cam 41 need to rotate back in the direction of the arrow shown in fig. 12 and 13, the primary sun wheel 311 needs to be driven to rotate in the direction opposite to the arrow in fig. 2, the lift winding wheel 1 fixed with the primary inner ring teeth is locked by the end ratchet 424 of the ring slide block 42, the annular cam 41 rotates in the same direction as the primary sun gear 311 and presses the inner wall protrusion 425 of the annular slider 42 through the outer wall protrusion 414 of the annular cam to slide the annular slider 42 in the direction of pushing away from the lift roller 1 against the action of the annular slider return spring 43, when the secondary planet carrier 324 rotates in the same direction as the variable pitch roller 21 and the annular cam 41 until the limit protrusion 3242 thereof rests on the side wall of the base 6 and no longer rotates and the locking notch 3241 thereof is aligned with the step 542 of the second slider 54, the end ratchet 424 of the annular slider 42 is out of the constraint with the fan-shaped notch 125 on the cylindrical boss 124 of the right half wheel 12 of the lift roller 1, the lift roller 1 then rotates in the direction opposite to the arrow in fig. 12 and 13 to wind up the lift rope 7, at this time, the U-shaped swing link 17 cancels the pushing force on the first slider 52 and the first slider 52 returns to the initial position under the action of the first return spring 53, the semicircular end 541 of the second slide block 54 returns to the waist notch 521 at the half waist of the first slide block 52 under the action of the second return spring 55, the end step 542 returns to the locking notch 3241 of the secondary planet carrier 324, and the lifting roller 1 continues to rotate until all the blades of the shutter are lifted and folded to the top of the window.

Claims

1. A lifting turner of a variable-pitch shutter is characterized by comprising a lifting winding wheel (1), a variable-pitch turner (2), a switcher (3), a base (6) with a middle support (44) and a right support (45), wherein a first ladder belt (80) and a second ladder belt (81) which are used for adjusting the pitch and the inclination angle of blades are connected to the blades of the shutter, the lifting winding wheel (1), the variable-pitch turner (2) and the switcher (3) are coaxially arranged on the base (6), the first ladder belt (80) and the second ladder belt (81) are connected to the variable-pitch turner (2), a lifting rope (7) used for drawing and unfolding the blades of the shutter is wound on the lifting winding wheel (1), the switcher (3) is in transmission connection with the lifting winding wheel (1) and the variable-pitch turner (2), a locking mechanism is arranged in the switcher (3), the locking mechanism can enable the switcher (3) to convert input power between the lifting winding wheel and the variable-pitch turner (2), the switcher (3) comprises a first-stage gear clutch and a second-stage gear transmission mechanism, the second-stage gear clutch mechanism (5) and a second-stage locking mechanism (5) and a second-stage gear transmission mechanism, the cam locking mechanism (4) is positioned between the lifting winding wheel (1) and the variable-pitch turner (2), two ends of the sliding block locking mechanism (5) are respectively corresponding to the lifting winding wheel (1) and the secondary planetary gear clutch, the primary planetary gear clutch is in transmission connection with the lifting winding wheel (1), the secondary planetary gear clutch is in transmission connection with the variable-pitch turner (2) and the cam locking mechanism (4), the cam locking mechanism (4) can be separated from the lifting winding wheel (1) and can unidirectionally lock the lifting winding wheel when the variable-pitch turner rotates reversely, the sliding block locking mechanism (5) can lock the secondary planetary gear clutch and unlock the secondary planetary gear clutch under the driving of the lifting winding wheel (1), the cam locking mechanism (4) comprises an annular cam (41), an annular sliding block (42) and an annular sliding block reset spring (43), the annular cam (41) and the annular sliding block (42) are both in a sleeve structure, the annular sliding block (42) is circumferentially static, the annular sliding block reset spring (43) is positioned between the annular sliding block (42) and the annular sliding block (411) and a pair of annular sliding blocks (412) is arranged on the outer wall of a central barrel body, and a pair of the annular sliding block (411) is arranged on the outer wall of the annular sliding block (412), the end face of the annular sliding block (42) is provided with a pair of symmetrical end ratchets (424) which can be jointed with the lifting winding wheel (1), and the inner wall of the annular sliding block (42) is provided with a pair of inner wall lugs (425) which are radially staggered and can be abutted against the outer wall lugs (414) of the annular cam.

2. The lifting turner of a variable pitch blind according to claim 1, wherein the primary planetary gear clutch comprises a primary sun gear (311), a primary planet gear (312), a primary planet carrier (313) and a primary inner ring gear (115) fixed on the end surface of the lifting roller (1), the primary planet gear (312) is arranged on the primary planet carrier (313) and surrounds the primary sun gear (311), and the primary planet gear (312) is externally engaged with the primary sun gear (311) and is simultaneously internally engaged with the primary inner ring gear (115) on the end surface of the lifting roller (1).

3. The lifting turner of the variable-pitch blind window as claimed in claim 2, wherein the secondary planetary gear clutch comprises a secondary inner ring gear (321), a secondary sun gear (322), a secondary planet gear (323) and a secondary planet carrier (324), the secondary planet gear (323) is fixedly arranged on the end surface of the right support (45), the secondary planet gear (323) is externally engaged with the secondary sun gear (322) and is internally engaged with the secondary inner ring gear (321), the secondary sun gear (322) is in transmission connection with the primary planet carrier (313) through a hollow tube (314), and a locking notch (3241) which can form locking fit with the sliding block locking mechanism (5) and a limit bump (3242) which can be clamped with the base (6) are arranged on the periphery of the secondary planet carrier (324).

4. The lifting and turning device of a variable-pitch blind according to claim 1, wherein the lifting roller (1) comprises a left half wheel (11), a right half wheel (12), a pin shaft and a U-shaped swing link (17), the left half wheel (11) and the right half wheel (12) are fixedly connected into a whole, the end of the lifting rope (7) is connected between the left half wheel (11) and the right half wheel (12) through the pin shaft, the U-shaped swing link (17) is hinged between the left half wheel (11) and the right half wheel (12), the free end of the U-shaped swing link (17) in a drooping state is abutted to the slider locking mechanism (5), and the right half wheel (12) is provided with a pair of fan-shaped notches (125) capable of being embedded with end ratchets (424).

5. The lifting and turning device of a variable-pitch blind according to claim 4, wherein the opposite end surfaces of the left half wheel (11) and the right half wheel (12) are respectively provided with a sector groove, and the U-shaped swing rod (17) turns in the sector grooves.

6. The lifting turner of a variable pitch blind according to claim 1, characterized in that the slider locking mechanism (5) comprises a first slider (52), a first return spring (53), a second slider (54) and a second return spring (55), the first slider (52) and the second slider (54) are slidably connected to the base (6) and respectively correspond to the lifting reel (1) and the two-stage planetary gear clutch (32), the first return spring (53) is located between the first slider (52) and the base (6), the second return spring (55) is located between the second slider (54) and the base (6), the head end (541) of the second slider (54) is semicircular, the tail end of the second slider (54) is provided with a step (542), the waist of the first slider (52) is provided with a waist notch (521) adapted to the head end of the second slider (54), the first slider (52) is driven by the lifting reel (1) and drives the second slider (54) to slide.

7. The lifting and turning device of the variable-pitch blind window according to any one of claims 1 to 6, wherein the variable-pitch turning device (2) comprises a variable-pitch rolling wheel (21), a variable-pitch turning cylinder (22), an intermittent mechanism (23) and a hollow shaft (24), a pair of fan-shaped openings (212) is arranged on the variable-pitch rolling wheel (21), the variable-pitch rolling wheel (21) and the hollow shaft (24) are embedded together through a key-slot matching structure, two upper ends of a first ladder belt (80) penetrate through the bottom of the base (6) and surround the variable-pitch turning cylinder (22) to be fixedly connected to the top of the variable-pitch turning cylinder (22), two upper ends of a second ladder belt (81) penetrate through the bottom of the base (6) and surround the turning device and enter the top opening of the variable-pitch turning cylinder (22), and then are respectively fixed in the two fan-shaped openings (212) through an arc-shaped pressing block (211) fixed between the two fan-shaped openings (212) on the variable-pitch rolling wheel (21).

8. A lifting and lowering turner for a variable pitch blind as claimed in claim 7, wherein the arc-shaped pressing piece (211) is fixed between the two sector-shaped openings (212) of the variable pitch winding wheel (21) by means of screws (214).