CN112412313B

CN112412313B - Screw rod rope winder with switcher and variable-spacing shutter lifting turner

Info

Publication number: CN112412313B
Application number: CN202011310898.4A
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: CN112412313A

Abstract

The invention provides a screw rope winder with a switcher, which comprises a screw rope winder body, the switcher, a support and a base, wherein the screw rope winder body and the switcher are arranged in a shell enclosed by the support and the base, the screw rope winder body comprises a screwed nut and a screwed screw, the switcher comprises a two-stage reduction planetary gear clutch, a screw circumferential locking mechanism, a sliding block locking mechanism and a swing rod locking mechanism, the screw is in transmission connection with the two-stage reduction planetary gear clutch, the sliding block locking mechanism can convert a power transmission path of the two-stage reduction planetary gear clutch along with the movement of the nut, the screw circumferential locking mechanism can gradually lock the screw along with the rotation of the screw, and the swing rod locking mechanism can lock the reverse rotation of the screw. The invention also provides a variable-spacing blind window lifting turner comprising the screw rope winder.

Description

Screw rod rope winder with switcher and variable-spacing shutter lifting turner

Technical Field

The present invention relates to a shutter control device, and more particularly, to a screw winder with a switch and a variable-pitch shutter lifting and overturning device.

Background

The switching of the folding and unfolding of the louver blades and the turnover of the blades of the louver is realized by the friction sliding of a ladder belt and a rope winder or a torsion spring between a lifting winding wheel and a turnover winding wheel of the rope winder, and the switching mode has a defect that the blades are always in an inclined closing state in the folding and unfolding motion process of the louver blades, so that the lifting rope and the perforated edges of the blades are always in a friction state and are rapidly 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 through hole 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, 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 not effectively solved, therefore, the invention with the publication number of CN103388445B adopts the screw rope winder, the slider is used for replacing the lever, the nut is driven to move axially by the rotation of the screw to push the slider to be separated from the planet carrier cam, however, the new solution also has a defect that the nut is gradually locked on the support wall surface of the base in the process of pushing the slider to be separated from the planet carrier cam, the thread abrasion and the tooth slippage between the nut and the screw are easily caused, and the initial positions of the nuts on the screw rope winder at the two ends of the top rail of the shutter are not accurately determined, so that the two ends are uneven when the bottom rail is lifted and lowered when the blades are folded; publication No. CN106320954B proposes a slider mechanism that does not easily lock the nut to the wall surface of the seat to cause thread slippage and circumferentially lock the screw, but the contact between the circumferential projection of the screw and the slider depends on the pitch of the screw, which is generally very small, so that the contact surface between the circumferential projection of the screw and the slider is very small, which often results in failure of the locking mechanism; the above-mentioned patent adopting pendulum bar/locking lever has a common characteristic, namely lock the reversal of the inner ring tooth that couples to threaded spindle by the pendulum bar/locking lever with V-arrangement reset spring that is set up in the side, oppress the locking to the threaded spindle by the planet carrier that couples to turnover mechanism, because the pendulum bar is overlength, the frictional contact surface with wall is relatively large, also by inner ring tooth extrusion deformation make this pendulum bar locking mechanism fail while locking the inner ring tooth fixedly connected to threaded spindle, also, the synchronism problem often takes place with planet carrier unblock in screw locking, make the shutter working condition change incoherently. The three technical defects of easy failure of the sliding block mechanism locking mechanism, easy failure of the swing rod locking mechanism and asynchronous screw rod locking and planet wheel carrier unlocking are frequently exposed in the using process of a user to cause the user dissatisfaction, so a new solution is required to be provided to overcome the defects.

Disclosure of Invention

The invention provides a screw rod rope winder with a switcher and a variable-spacing blind window lifting turner, which adopt a screw rod circumferential locking mechanism, a slide block locking mechanism and a swing rod locking mechanism with more reliable performance, and aims to overcome the technical defects.

The technical scheme of the invention is as follows: the utility model provides a take screw rod ropewinder of switch, including screw rod ropewinder body, the switch, support and base, screw rod ropewinder body and switch are installed in the support and base enclose synthetic casing, screw rod ropewinder body is including the nut and the screw rod that close soon, the switch includes two-stage reduction planetary gear clutch, screw rod circumference locking mechanical system, slider locking mechanical system and pendulum rod locking mechanical system, the screw rod is connected with the transmission of two-stage reduction planetary gear clutch, slider locking mechanical system can change the power transmission route of two-stage reduction planetary gear clutch along with the removal of nut, screw rod circumference locking mechanical system can be along with the rotation of screw rod locking screw rod gradually, the reverse rotation of pendulum rod locking mechanical system lockable screw rod. The invention is used for a variable-pitch shutter lifting turner, a screw circumferential locking mechanism and a swing rod locking mechanism can respectively lock forward rotation and reverse rotation of a screw, wherein the forward direction corresponds to shutter unfolding, pitch reduction, blade inclination and closing of a shutter, and the reverse direction corresponds to blade return to the path. The slider locking mechanism can enable the two power transmission paths from the two-stage reduction planetary gear clutch to the downstream mechanism of the screw rope winder and from the two-stage reduction planetary gear clutch to the screw rope winder body to be switched, the slider locking mechanism can block and conduct the transmission path from the two-stage reduction planetary gear clutch to the downstream mechanism of the screw rope winder, when the slider locking mechanism blocks the transmission path from the two-stage reduction planetary gear clutch to the downstream mechanism of the screw rope winder, the transmission path between the two-stage reduction planetary gear clutch and the screw is only kept to be conducted, and external power introduced by the two-stage reduction planetary gear clutch can drive the screw to move; after the screw is locked, the slide block locking mechanism can be unlocked by continuously inputting power. The advance and retreat of the slide block locking mechanism are controlled by the movement of the nut, so that the slide block locking mechanism is not easy to lock. The screw rod circumferential locking mechanism gradually locks the screw rod along with the rotation of the screw rod, namely the screw rod cannot be locked immediately after the screw rod circumferential locking mechanism touches the lug on the outer wall of the screw rod, the screw rod can still be allowed to rotate by a small angle, namely the nut is locked finally after moving axially by a distance which is much smaller than the screw pitch, namely, the U-shaped block on the nut plays a role in amplifying the axial moving distance of the nut, and the locking failure caused by extrusion deformation can be better prevented. The motion surface of the locking piece of the swing rod locking mechanism is vertical to the axis of the screw rod, so that the locking piece is easier to collide with the rotation of the screw rod when moving, and a better locking effect is achieved.

Preferably, the two-stage reduction planetary gear clutch comprises a first-stage inner ring gear, a first-stage sun gear, a first-stage planetary gear carrier, a second-stage sun gear, a second-stage planetary gear carrier and a second-stage inner ring gear, wherein the first-stage inner ring gear is fixed at the end of the screw rod, the first-stage sun gear and the first-stage planetary gear are installed on the first-stage planetary gear carrier, the first-stage planetary gear is externally meshed with the first-stage sun gear and is internally meshed with the first-stage inner ring gear, the second-stage sun gear is installed on the first-stage planetary gear carrier and is opposite to the face where the first-stage sun gear is located, the second-stage planetary gear is installed on the second-stage planetary gear carrier and is installed on the second-stage planetary gear carrier additional gear, the second-stage sun gear penetrates through a center hole in the second-stage planetary gear carrier additional gear and is externally meshed with the second-stage inner ring gear, the second-stage inner ring gear is fixed on the base, and the second-stage planetary gear carrier additional gear can form locking fit with the sliding block locking mechanism. When the first-stage sun gear is driven to rotate by the outside, the screw rod can be driven by a transmission path of the first-stage planetary gear and the first-stage inner ring gear, and the power can also be transmitted to the variable-pitch turner by a transmission path of the first-stage planetary gear, the first-stage planet gear carrier, the second-stage sun gear, the second-stage planetary gear and the second-stage inner ring gear, the second-stage planet gear carrier is driven to transmit power to the variable-pitch turner, the power led in by the first-stage sun gear is transmitted to a downstream mechanism of the screw rope winder when the screw rod is locked, and the power led in by the first-stage sun gear is transmitted to the screw rod when an additional wheel of the second-stage planet gear carrier is locked by the sliding block locking mechanism.

Preferably, the screw circumferential locking mechanism comprises a U-shaped block and a U-shaped return spring, the U-shaped block is rotatably installed in a U-shaped cavity at the top of the nut, the U-shaped return spring is located between the U-shaped block and the inner wall of the U-shaped cavity, and an outer wall convex block which can gradually approach the U-shaped block until the convex block abuts against the inner wall of the U-shaped cavity to form locking is arranged on the circumferential surface of the inner ring tooth of the first stage. Under the normal state, the U-shaped block is clung to the inner side of the U-shaped cavity under the action of the U-shaped reset spring, the outer wall convex block is gradually close to the U-shaped block along with the rotation of the screw rod, the U-shaped block has certain freedom degree of movement, the relative rotation between the screw rod and the nut cannot be blocked immediately after the outer wall convex block touches the U-shaped block, the screw rod is locked, but the outer wall convex block can still push the U-shaped block to continue moving, the screw rod can still continue rotating for a small angle, so that the nut is finally locked after moving for a distance which is much smaller than a screw pitch in the axial direction, and finally, the outer wall convex block and the nut have larger intersection depth, namely, the U-shaped block has the function of amplifying the axial moving distance of the nut, and can better prevent the locking failure caused by extrusion deformation.

Preferably, the sliding block locking mechanism comprises an adjusting sliding block, a locking sliding block and a sliding block return spring, the adjusting sliding block and the locking sliding block are connected to the base in a sliding mode, the sliding block return spring is arranged between the second-stage inner ring teeth and the locking sliding block, the adjusting sliding block is driven by a nut and is abutted to the locking sliding block, and one side of the secondary planet gear carrier additional wheel is provided with an arc-shaped protruding block which can form locking matching with the locking sliding block and protrudes axially. Under normal state, the slide block return spring pushes the locking slide block to lock the arc-shaped convex block, when the screw rod rotates and the lifting rope is released to the limit, the position reached by forward movement of the nut can touch the adjusting slide block, the adjusting slide block is pushed to push the locking slide block to move backwards, the locking slide block moves backwards against the elastic force of the slide block return spring and returns to the position of avoiding the arc-shaped convex block, and therefore the secondary planet wheel carrier additional wheel is unlocked.

Preferably, an adjusting screw is arranged at one end of the adjusting slide block facing the locking slide block, and the adjusting slide block is abutted to the locking slide block through the adjusting screw. The distance between the adjusting slide block and the locking slide block can be changed through the adjusting screw, so that the adjusting screw can be better matched with the arc-shaped convex block in position. The synchronism of the plurality of screw rod rope winders on the shutter is ensured by adjusting the adjusting screws on the sliding block locking mechanism.

Preferably, the bottom of the nut is provided with a bottom boss, and the bottom boss is abutted to the adjusting slide block. When the nut rotates, the nut is driven to move axially, and the bottom boss pushes the adjusting slide block to slide, so that the adjusting slide block is driven by the nut.

Preferably, a square cavity facing the locking sliding block is arranged at the bottom of the second-stage inner ring teeth, a spring insertion hole is formed in one end, facing the second-stage inner ring teeth, of the locking sliding block, and two ends of a sliding block return spring are inserted into the square cavity and the spring insertion hole respectively. Two ends of the slide block return spring are respectively inserted into the square cavity and the spring insertion hole, so that the slide block return spring can stably maintain the position, and the function of pre-tightening and locking the slide block can be ensured to be reliably performed by the slide block return spring.

Preferably, the swing rod locking mechanism comprises a swing rod and a reset spring piece fixed at the bottom of the swing rod, the swing rod is rotatably connected to the base, and a radial convex block capable of touching and pressing the free end of the swing rod to force the swing rod to be inwardly folded is arranged on the periphery of the additional wheel of the secondary planet carrier. In the rotation process of the secondary planet carrier additional wheel, the radial convex block is pressed or leaves the free end of the swing rod to form two states of outward springing and inward springing of the swing rod, and the swing rod realizes locking and unlocking of the screw rod through the conversion of the outward springing state and the inward springing state.

Preferably, the outer edge of the inner ring gear of the first stage is provided with a gear ring radial projection which can form locking with the free end of the swing rod, and the rotation locking direction of the swing rod to the gear ring radial projection is opposite to the rotation locking direction of the screw rod circumferential locking mechanism to the screw rod. The swing rod swings upwards under the action of the elastic force of the bottom reset spring piece, the free end of the swing rod enters the position of propping against the radial convex block of the gear ring, one direction of the screw rod can be prevented from rotating, and the screw rod can be ensured to be reliably locked by combining the locking of the circumferential locking mechanism of the screw rod to the other rotating direction of the screw rod.

The utility model provides a contain variable interval shutter lift turner of screw rod ropewinder, includes screw rod ropewinder and variable interval turner, variable interval turner be located support and base enclose synthetic casing, the switch in the screw rod ropewinder is connected with variable interval turner transmission through a quill shaft. The variable-pitch turner is a downstream mechanism of the screw rope winder, and can receive the drive of the screw rope winder to control the blade turning and the blade pitch of the shutter so as to adjust the opening of the light inlet gap.

The beneficial effects of the invention are:

the rotation of the U-shaped block of the screw circumferential locking mechanism has an amplification effect, so that the screw locking is not limited by the size of the screw pitch any more, and the reliability of the screw locking mechanism is ensured.

The reverse force caused by the locking of the secondary planet gear carrier additional wheel at the output end of the switcher and the locking slide block is converted into circumferential force, so that the secondary planet gear carrier is not lifted away from the base together with the central shaft any more.

The swing rod for preventing the screw from reversing in the swing rod locking mechanism is changed into a swing rod perpendicular to the side wall of the base from a swing rod parallel to the side wall of the base, the arm of force of the swing rod is changed into a long arm from a short arm, the force for pushing and pressing the swing rod is greatly reduced, meanwhile, the friction force between the swing rod and the side wall of the base is eliminated, and the swing rod locking mechanism does not fail.

Drawings

FIG. 1 is a three-dimensional assembly drawing of the present invention;

FIG. 2 is a front right three-dimensional exploded view of the present invention;

FIG. 3 is a rear left three-dimensional exploded view of the present invention;

FIG. 4 is a partial cross-sectional top view of the screw lock mechanism of the present invention in an unlocked state;

FIG. 5 is a partial cross-sectional top view of the screw lock mechanism of the present invention in a locked condition;

FIG. 6 is a front right three-dimensional exploded view of the slider locking mechanism of the present invention;

FIG. 7 is a rear left three-dimensional exploded view of the slider locking mechanism of the present invention;

FIG. 8 is a partial cross-sectional view of the slider locking mechanism of the present invention in a locked state;

FIG. 9 is a partial cross-sectional view of the slider locking mechanism of the present invention in an unlocked state;

FIG. 10 is a different cross-sectional view of the rocker locking mechanism of the present invention in the unlocked state;

fig. 11 is a different cross-sectional view of the pendulum locking mechanism of the present invention in a locked state.

Detailed Description

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

Example (b):

as shown in fig. 1 to 11, the variable-pitch blind lifting and turning device comprises a screw rope winder and a variable-pitch turning device 3, wherein the variable-pitch turning device 3 is a downstream mechanism of the screw rope winder. The screw rod ropewinder includes screw rod ropewinder body 1, switch 2, support and base 6, screw rod ropewinder body 1, switch 2, become interval turner 3 and install in support and base 6 enclose synthetic casing, the support is including installing right support 4 at 6 both ends of base, left support 5, screw rod ropewinder body 1 is including the nut 11 and the screw rod 12 that close soon, 11 both sides of nut are equipped with pulley 113, the both sides wall of base 6 is equipped with spout 62, pulley 113 sliding connection is in spout 62, so 11 both sides of nut are restricted by base 6, only can axial displacement. The switcher 2 comprises a two-stage reduction planetary gear clutch, a screw circumferential locking mechanism, a slider locking mechanism and a swing rod locking mechanism, a screw 12 is in transmission connection with the two-stage reduction planetary gear clutch, the screw circumferential locking mechanism and the swing rod locking mechanism can lock the screw 12, the slider locking mechanism can convert a power transmission path of the two-stage reduction planetary gear clutch along with the movement of a nut 11, the screw circumferential locking mechanism can gradually lock the screw 12 along with the rotation of the screw 12, and the swing rod locking mechanism can lock the reverse rotation of the screw 12. The two-stage reduction planetary gear clutch comprises a primary inner ring gear 211, a primary sun gear 212, six primary planetary gears 213, a primary planet carrier 214, a secondary sun gear 215, a secondary planet carrier additional wheel 216, six secondary planetary gears 217, a secondary planet carrier 218 and a secondary inner ring gear 219, wherein the primary inner ring gear 211 is fixed at the end part of the screw 12, the primary sun gear 212 and the primary planetary gears 213 are installed on the primary planet carrier 214, the wheel shafts of the primary planetary gears 213 are rotatably inserted on the primary planet carrier 214, the primary planetary gears 213 are externally engaged with the primary sun gear 212 and are internally engaged with the primary inner ring gear 211, the secondary sun gear 215 is installed on the surface of the primary planet carrier 214 opposite to the surface where the primary sun gear 212 is located, the secondary planetary gears 217 are installed on the secondary planet carrier 218 and the secondary planet carrier additional wheel 216, the wheel shafts of the secondary planetary gears 217 are rotatably inserted on the secondary planet carrier 218 and the secondary planet carrier additional wheel 216, the secondary sun gear 215 penetrates through the central hole of the secondary planet carrier additional wheel 216 and is engaged with the secondary inner ring gear 217, and the secondary planet carrier additional wheel 219 is fixed on the secondary planet carrier base 6. The screw circumferential locking mechanism comprises a U-shaped block 221 and a U-shaped return spring 222, the U-shaped block 221 is rotatably installed in a U-shaped cavity 111 at the top of the nut 11, the rotation amplitude of the U-shaped block is limited by the inner walls of two sides of the U-shaped cavity 111, the U-shaped return spring 222 is located between the U-shaped block 221 and the inner wall of the U-shaped cavity 111, and an outer wall convex block 2111 which can gradually approach the U-shaped block 221 until the U-shaped block is attached and abutted to form locking is arranged on the circumferential surface of the primary inner ring tooth 211. The slide block locking mechanism comprises an adjusting slide block 231, a locking slide block 233 and a slide block return spring 234, wherein the adjusting slide block 231 and the locking slide block 233 are limited on the base 6 to slide in sequence, the slide block return spring 234 is arranged between the second-stage inner ring teeth 219 and the locking slide block 233, the adjusting slide block 231 is driven by the nut 11 and is abutted against the locking slide block 233, and one side of the second-stage planet carrier additional wheel 216 is provided with an axially protruding arc-shaped convex block 2162 which can form locking fit with the locking slide block 233. An adjusting screw 232 is provided at one end of the adjusting slider 231 facing the locking slider 233, and the adjusting slider 231 is finely adjusted between the adjusting slider 231 and the locking slider 233 by abutting the adjusting screw 232 against the locking slider 233. The bottom of the nut 11 is provided with a bottom boss 112, and the bottom boss 112 abuts against the adjusting slider 231. The bottom of the second-stage inner ring gear 219 is provided with a square cavity 2191 facing the locking slider 233, one end of the locking slider 233 facing the second-stage inner ring gear 219 is provided with a spring insertion hole 2333, and two ends of the slider return spring 234 are respectively inserted into the square cavity 2191 and the spring insertion hole 2333. The swing rod locking mechanism comprises a swing rod 241 and a reset spring piece 243 fixed at the bottom of the swing rod 241, the swing rod 241 is the locking piece, the swing rod 241 is rotatably connected to the base 6, the rotating surfaces of the swing rod 241 and the swing rod 241 are perpendicular to the side wall 6 of the base, and the circumferential surface of the secondary planet carrier additional wheel 216 is provided with a radial convex block 2161 which can touch and press the free end of the swing rod 241 to force the swing rod 241 to contract inwards. The outer edge of the first-stage inner ring teeth 211 is provided with a gear ring radial lug 2113 which can form locking with the free end of the swing rod 241, and the rotation locking direction of the swing rod 241 to the gear ring radial lug 2113 is opposite to the rotation locking direction of the screw circumferential locking mechanism to the screw 12.

The installation order of this take screw rod ropewinder body 1 of switch 2 in variable pitch shutter lift turner is as follows: a screw 12 of the screw rope winder body 1 penetrates through a nut 11 and is screwed with the nut 11, one end of the screw 12 is arranged on the right support 4, the other end of the screw 12 is fixedly connected with a first-stage inner ring gear 211, pulleys 113 on two sides of the nut 11 are embedded in sliding grooves 62 on two side walls of the base 6 to limit the circumferential rotation of the nut 11, so that the friction force of the nut 11 in the axial sliding process is reduced, a U-shaped cavity 111 is laterally arranged at the top of the nut 11, see fig. 4 and 5, a bottom boss 112 is arranged at the bottom of the nut 11, and a guide hole 115 for enabling a lifting rope 7 to penetrate through and wind to the screw 12 is arranged in the middle of the bottom boss 112; one end of a primary sun gear 212 is inserted into a central hole of primary inner ring teeth 211, the other end of the primary sun gear 212 is inserted into a central hole of a primary planet gear carrier 214 and is meshed with a primary planet gear 213 arranged on the primary planet gear carrier 214, the primary planet gear 213 is meshed with the primary inner ring teeth 211, the end part of the primary inner ring teeth 211 which is embedded with the screw 12 is provided with a side wall bump 2111, a notch 2112 at the upper end 71 of a hanging and buckling lifting rope 7 and a gear ring radial bump 2113, a secondary sun gear 212 is fixed on the output end of the primary planet gear carrier 214 and penetrates through a secondary planet carrier additional gear 216 to be meshed with a secondary planet gear 217 arranged on a secondary planet carrier 218, the secondary planet gear 217 is meshed with a secondary inner ring teeth 219 fixed on the base 6, the secondary planet carrier additional gear 216 is embedded with the secondary planet carrier 218 into a whole, one side of the secondary planet carrier additional gear 216 is provided with a radial bump 2161, and the other side is provided with an arc bump 2162; one end of the hollow shaft 31 with the key slot is embedded with the output end of the switcher 2, namely the second-stage planet carrier 218, and the other end of the hollow shaft 31 with the key slot is embedded with the input end 32 of the variable-pitch turner 3, so that external power introduced from the first-stage sun gear 212 can be transmitted to the variable-pitch turner 3, transmission connection between the switcher 2 and the variable-pitch turner 3 is realized, and then a ladder belt 8 connected to the variable-pitch turner 3 is driven to control blade turning and blade pitch of the louver, so that the aperture of a light inlet gap is adjusted; the U-shaped block 221 with the U-shaped return spring 222 is limited in the U-shaped cavity 111 at the top of the nut 11 through the pin 223 and can rotate around the pin 223, the locking slide block 233 sliding axially in the slide groove 63 of the base 6 is embedded in the square hole 2191 at the bottom of the secondary inner ring gear 219, a slide block return spring 234 is installed between the secondary inner ring gear 219 and the locking slide block 233, the locking slide block 233 is further provided with a V-shaped groove 2332 matched with the arc-shaped bump 2162 on the secondary planet carrier additional wheel 216, see fig. 7, one end of the adjusting slide block 231 is contacted with the contact end 2331 of the locking slide block 233 through the adjusting screw 232, and the other end of the adjusting slide block 231 can be contacted with the bottom boss 112 at the bottom of the nut 11; the swing link 241 of the swing link locking mechanism is fixed on the base 6 by a pin 242 and can rotate around the pin 242, and a reset spring plate 243 is installed at the bottom of the swing link 241.

When the lifting rope 7 wound on the screw 12 is released and descends, the primary sun gear 213 needs to be driven to rotate clockwise as shown in fig. 3, and at this time, the locking slider 233 locks the secondary planet carrier additional wheel 216, that is, when the arc-shaped projection end 2162 of the secondary planet carrier additional wheel 216 is abutted by the V-shaped groove 2332 of the locking slider 233, see fig. 7 and 8, the screw 12 is driven to rotate counterclockwise as shown in fig. 3, and the nut 11 is pushed to approach the primary inner ring gear 211; when the bottom boss 112 touches the adjusting slider 231 of the slider locking mechanism, the sidewall boss 2111 on the primary inner ring gear 211 fixedly connected with the screw 12 touches the U-shaped block 221 at the top of the nut 11, see fig. 4, at this time, the swing rod 241 is still pushed by the axial boss 2161 of the secondary planet carrier additional wheel 216 to be in an unlocked state, see fig. 11, the primary sun gear 213 is continuously driven clockwise, the screw 12 continues to rotate counterclockwise, the nut 11 is pushed to approach the primary inner ring gear 211, simultaneously, the bottom boss 112 pushes the adjusting slider 231 and the locking slider 233 to slide by overcoming the elastic force of the slider return spring 234, and when the bottom boss 112 is separated from the contact with the arc-shaped boss end 2162 of the secondary planet carrier additional wheel 216, see fig. 9, the side wall convex block 2111 on the primary inner ring tooth 211 fixedly connected with the screw 12 overcomes the elasticity of the U-shaped return spring 222 to push the U-shaped block 221 at the top of the nut 11 to rotate around the pin shaft 223 to reach the other wall 1111 of the U-shaped cavity, see fig. 4 and 5, so that the screw 12 is locked and does not rotate any more, see fig. 5, because the rotation of the U-shaped block 221 generates a depth larger than the pitch movement amount of the nut 11 in the axial direction, when the screw 12 rotates a small angle again after the side wall convex block 2111 on the primary inner ring tooth 211 is contacted with the U-shaped block 221, the side wall convex block 2111 and the U-shaped block 221 form a large contact surface, the locking failure caused by the deformation of the screw 12 and overload can be better resisted, and the locking reliability of the screw 12 is ensured; while the screw 12 is locked, the secondary planet carrier 218 and the secondary planet carrier additional wheel 216 are released to start to rotate clockwise as shown in fig. 3, the radial projection 2161 on the secondary planet carrier additional wheel 216 gradually removes the pressure on the swing link 241, and the swing link 214 swings upwards under the elastic action of the bottom reset spring plate 243, and the top end of the swing link enters the position of the ring gear radial projection 2113 which is pressed against the primary inner ring gear 211, see fig. 10, so as to prevent the screw 12 fixedly connected with the primary inner ring gear 211 from rotating reversely; when the secondary planet carrier 218 drives the pitch-variable turner 3 to rotate through the hollow shaft 31 embedded with the secondary planet carrier 218, and the pitch-variable turner 3 completes a predetermined louver pitch-variable and rotation action through the first ladder belt 80 and the second ladder belt 81 connected with the pitch-variable turner 3, the pitch-variable turner 3 can return in a return way, that is, the primary sun gear 213 is driven to rotate counterclockwise, and at this time, the primary inner ring teeth 211 fixedly connected with the screw 12 are locked by the swing link 241 and cannot rotate clockwise, see fig. 10, so that the secondary planet carrier 218 rotates counterclockwise together with the secondary planet carrier additional wheel 216 until the radial projection 2161 of the secondary planet carrier additional wheel 216 gradually presses down the swing link 241, so that the ring gear radial projection 2113 of the primary inner ring teeth 211 fixedly connected with the screw 12 is out of contact with the head of the swing link 241 to be unlocked and rotates clockwise, the secondary planet carrier 218 and the secondary planet carrier additional wheel 216 stops moving, the primary planet carrier 211 fixedly connected with the screw continues to rotate clockwise, the side wall projection 2111 of the screw 12 starts to cancel the thrust of the U-shaped block 221 on the top of the nut 11, and the U-shaped block 221 cancels the thrust of the inner ring teeth of the louver wheel 211 in the inner ring teeth 211 fixedly connected with the lifting slider 7, and the lifting slider 7 moves back to the inner ring slider 2, and the axial direction of the lifting slider 2, and the lifting slider is reversed in the direction of the lifting slider 2, and the lifting slider is reversed in the axial direction of the inner ring slider 2.

Claims

1. A screw rope winder with a switcher comprises a screw rope winder body (1), the switcher (2), a support and a base (6), wherein the screw rope winder body (1) and the switcher (2) are installed in a shell formed by enclosing the support and the base (6), the screw rope winder body (1) comprises a nut (11) and a screw (12) which are screwed together, the screw rope winder is characterized in that the switcher (2) comprises a two-stage reduction planetary gear clutch, a screw circumferential locking mechanism, a sliding block locking mechanism and a swing rod locking mechanism, the screw (12) is in transmission connection with the two-stage reduction planetary gear clutch, the screw circumferential locking mechanism can gradually lock the forward rotation of the screw (12) along with the rotation of the screw (12), the swing rod locking mechanism can lock the screw (12), the sliding block locking mechanism can lock the forward rotation of the screw (12), the reverse rotation of the swing rod locking mechanism of the screw (12), the two-stage reduction planetary gear clutch comprises one-stage inner ring teeth (211), one-stage sun gear (212), one-stage gear (213), one-stage planet carrier (215), secondary planet gear (216), secondary planet gear (219) and secondary planet carrier (218), the primary sun gear (212) and the primary planet gear (213) are mounted on a primary planet carrier (214), the primary planet gear (213) is externally engaged with the primary sun gear (212) and is simultaneously internally engaged with the primary inner ring gear (211), the secondary sun gear (215) is mounted on the primary planet carrier (214) and is opposite to the surface where the primary sun gear (212) is located, the secondary planet gear (217) is mounted on a secondary planet carrier (218) and an additional wheel (216) of the secondary planet carrier, the secondary sun gear (215) penetrates through a central hole in the additional wheel (216) of the secondary planet carrier and is externally engaged with the secondary planet gear (217), the secondary planet gear (217) is simultaneously internally engaged with the secondary inner ring gear (219), the secondary inner ring gear (219) is fixed on a base (6), and the additional wheel (216) of the secondary planet carrier can form locking fit with the slide block locking mechanism; the screw circumferential locking mechanism comprises a U-shaped block (221), and an outer wall convex block (2111) which can gradually approach the U-shaped block (221) until the convex block is attached and abutted to form locking is arranged on the circumferential surface of the primary inner ring tooth (211); the slide block locking mechanism comprises a locking slide block (233), and one side of the secondary planet carrier additional wheel (216) is provided with an axially protruding arc-shaped convex block (2162) which can form locking fit with the locking slide block (233); the swing rod locking mechanism comprises a swing rod (241), the swing rod (241) is rotatably connected to the base (6), and radial bumps (2161) capable of touching and pressing the free end of the swing rod (241) to force the swing rod (241) to be retracted are arranged on the circumferential surface of the secondary planet carrier additional wheel (216).

2. The switch-equipped screw cord winder according to claim 1, wherein said screw circumferential locking mechanism further comprises a U-shaped return spring (222) and a pin (223), the U-shaped block (221) is rotatably mounted in a U-shaped cavity (111) at the top of the nut (11), and the U-shaped return spring (222) is located between the U-shaped block (221) and the inner wall of the U-shaped cavity (111).

3. The switch-equipped screw cord winder according to claim 1, wherein said slider lock mechanism further comprises an adjustment slider (231) and a slider return spring (234), said adjustment slider (231) and said lock slider (233) are slidably connected to said base (6), said slider return spring (234) is disposed between said second-stage inner ring gear (219) and said lock slider (233), and said adjustment slider (231) is driven by said nut (11) and abuts against said lock slider (233).

4. The switch-equipped screw cord winder according to claim 3, wherein the adjusting slider (231) is provided with an adjusting screw (232) at an end thereof facing the locking slider (233), and the adjusting slider (231) is abutted against the locking slider (233) via the adjusting screw (232).

5. The switch-equipped screw cord winder according to claim 3, wherein the bottom of the nut (11) is provided with a bottom projection (112), and the bottom projection (112) abuts against the adjusting slider (231).

6. The screw rod rope winder with the switcher as claimed in claim 3, wherein the bottom of the second-stage inner ring gear (219) is provided with a square cavity (2191) facing the locking slider (233), one end of the locking slider (233) facing the second-stage inner ring gear (219) is provided with a spring insertion hole (2333), and both ends of the slider return spring (234) are inserted into the square cavity (2191) and the spring insertion hole (2333), respectively.

7. The switch-equipped screw winder of any of claims 1 to 6, wherein said swing link locking mechanism further comprises a return spring plate (243) fixed to the bottom of the swing link (241).

8. The screw winder with the switch according to claim 7, wherein the outer edge of the inner ring tooth (211) of the first stage is provided with a radial projection (2113) of the gear ring, which can form a lock with the free end of the swing link (241), and the rotation locking direction of the swing link (241) to the radial projection (2113) of the gear ring is opposite to the rotation locking direction of the screw (12) by the screw circumferential locking mechanism.

9. A variable-pitch blind window lifting turner comprising the screw rope winder of claim 1, characterized by comprising the screw rope winder and a variable-pitch turner (3), wherein the variable-pitch turner (3) is positioned in a shell formed by enclosing a support and a base (6), and a switcher (2) in the screw rope winder is in transmission connection with the variable-pitch turner (3) through a hollow shaft (31).