CN112591641B

CN112591641B - Rope control device

Info

Publication number: CN112591641B
Application number: CN202011539055.1A
Authority: CN
Inventors: 陈伟晓
Original assignee: Guangdong Huakun Technology Development Co ltd
Current assignee: Guangdong Huakun Technology Development Co ltd
Priority date: 2020-12-23
Filing date: 2020-12-23
Publication date: 2024-07-26
Anticipated expiration: 2040-12-23
Also published as: CN112591641A

Abstract

The invention discloses a rope control device which is used for adjusting and controlling a rope on a rope winding shaft, and comprises a rope guider, wherein the rope guider comprises a reciprocating screw rod and a sliding table which slides back and forth along the reciprocating screw rod, the reciprocating screw rod is in transmission connection with the rope winding shaft, and two thread grooves with the same thread pitch and opposite rotation directions are formed in the reciprocating screw rod; wedge-shaped surfaces are formed at the transition positions of the two ends of the thread groove and the reciprocating screw rod body, a shifting block is arranged in the sliding table, and the shifting block is connected with one thread groove of the reciprocating screw rod to realize the reciprocating motion of the sliding table on the reciprocating screw rod; the sliding table is provided with a rope guiding mechanism, the rope guiding mechanism comprises a rope guiding frame and two first guide wheels arranged on the rope guiding frame, the two first guide wheels are axially arranged along the rope winding shaft, the outer circumferential surfaces of the two first guide wheels are oppositely arranged, and the rope is clamped between the outer circumferential surfaces of the two first guide wheels. Avoiding the easy abrasion of the rope caused by the left-right swing of the rope in the rope arrangement process.

Description

Rope control device

Technical Field

The invention relates to the technical field of rope control devices, in particular to a rope control device.

Background

In a device for winding a rope by a rope winding shaft such as a jack or a lifter, the rope is aligned by a rope control device such as a rope guide in order to make full use of a space on the rope winding shaft and to avoid a disorder of winding of the rope. For example, in chinese patent publication No. CN208471422U, an automatic rope guider for winch is fixed under winch drum; the rope guider base is formed by combining a rope guider frame and rope guider side plates; the base of the rope arranging device is connected with a positive and negative threaded screw rod and polished rods symmetrically distributed on two sides of the screw rod; one end of the lead screw is connected with the servo motor through a coupler, and a control processor is arranged on one side of the servo motor; the application of various sensors and the application of a control processor are adopted to facilitate the intelligent control of the rope guide. Firstly, a rotary encoder is arranged on a winch roller body; a displacement sensor is arranged on the deviation correcting and guiding mechanism; the two ends of the front and back threaded screw rods are respectively provided with a non-contact inductive proximity switch; and (5) complete machine assembly is completed. However, the friction between the conventional rope control device and the rope is large, and the rope is easily worn seriously to cause breakage.

Disclosure of Invention

In view of the above, the present invention provides a rope control device, which can solve the problems of high friction between the existing rope control device and the rope, and easy breakage caused by serious rope abrasion.

The technical scheme of the invention is realized as follows:

The rope control device is used for adjusting and controlling a rope on a rope winding shaft and comprises a rope guider, wherein the rope guider comprises a reciprocating screw rod and a sliding table which slides back and forth along the reciprocating screw rod, the reciprocating screw rod is in transmission connection with the rope winding shaft, and two thread grooves with the same thread pitch and opposite rotation directions are formed in the reciprocating screw rod; wedge-shaped surfaces are formed at the transition positions of the two ends of the thread groove and the reciprocating screw rod body, a shifting block is arranged in the sliding table, and the shifting block is connected with one thread groove of the reciprocating screw rod to realize the reciprocating motion of the sliding table on the reciprocating screw rod; the sliding table is provided with a rope guiding mechanism, the rope guiding mechanism comprises a rope guiding frame and two first guide wheels arranged on the rope guiding frame for clamping a rope, the two first guide wheels are arranged along the axial direction of the rope winding shaft, the outer circumferential surfaces of the two first guide wheels are oppositely arranged, and the rope is clamped between the outer circumferential surfaces of the two first guide wheels.

As a further alternative of the rope control means, the outer circumferential surface of the first guide pulley is concave, and a passage capable of holding the rope is formed between the two first guide pulleys.

As a further alternative of the rope control device, a guide rod is arranged on the sliding table, and the shaft core of the guide rod is perpendicular to the shaft core of the rope winding shaft; the rope guide frame is slidably arranged on the guide rod.

As a further alternative of the rope control device, a plurality of ropes are arranged on the rope winding shaft, and rope guiding mechanisms which are the same as the ropes in number and are arranged along the equal distance are arranged on the sliding table of the rope arranging device.

As a further alternative of the rope control device, the rope control device further comprises a rope tightener, the rope tightener comprises a driving shaft and a driven shaft, the driving shaft is provided with a driving pulley, the driven shaft is provided with a driven pulley, and the driving pulley and the driven pulley are respectively positioned at two sides of the rope to clamp the rope; the driving shaft is in transmission connection with the motor; and the driving shaft or/and the driven shaft is/are connected with a buffer spring, and the buffer spring promotes the driving pulley or the driven pulley to press the rope.

As a further alternative of the rope control device, the number of the driving shafts and the driven shafts is plural, the driving shafts and the driven shafts are in one-to-one correspondence, the driving shafts and the motors are meshed with each other through gear rings to form a serial transmission path, and the driving shaft closest to the motors on the serial transmission path is connected with the buffer spring; the ropes disengage the gears on the corresponding drive shafts from the tandem drive path by compressing the buffer springs.

As a further alternative of the rope control means, the motor is connected with a safety output mechanism comprising a friction fixing ring with an inner gear ring, a planet carrier B, a planet wheel B arranged on the planet carrier B, and a sun wheel B connected to the motor; the sun gear B, the planet gear B and the friction fixing ring form a planetary gear train structure; the planet carrier B is provided with a gear positioned at the first position of the serial transmission path; the friction fixing ring is provided with an adjustable braking mechanism which provides a specified braking force for the friction fixing ring.

As a further alternative of the rope control device, the friction fixing ring is provided with a wing edge, the adjustable mechanism comprises two friction plates respectively clamped at two sides of the wing edge, and the braking force on the friction fixing ring is adjusted by controlling the distance between the two friction plates.

As a further alternative of the rope control device, the rope control device comprises two fixing plates, wherein two ends of the driving shaft and the driven shaft are respectively arranged on the two fixing plates; the gears on the serial transmission path are arranged in the fixed plate; a sliding groove is formed in the fixing plate, and when the buffer spring is extruded, a driving shaft or a driven shaft corresponding to the buffer spring slides along the sliding groove.

As a further alternative of the rope control device, a rope positioning frame is arranged between the rope arranging device and the rope tightening device, at least two second guide wheels are arranged on the rope positioning frame, the second guide wheels are arranged along the axial direction of the rope winding shaft, the outer circumferential surfaces of the two adjacent second guide wheels are oppositely arranged, and the rope is clamped between the outer circumferential surfaces of the two second guide wheels; the outer circumferential surface of the second guide wheels is concave, and a channel capable of clamping the rope is formed between the two second guide wheels; the channel formed between every two second guide wheels vertically corresponds to the driving pulley and the driven pulley of the pair of clamping ropes.

The invention has the beneficial effects that: the rope is clamped by the two first guide wheels, the friction force between the first guide wheels and the rope is reduced by utilizing the autorotation and smooth structure of the first guide wheels, and the situation that the rope is easy to wear and finally break due to the fact that the rope swings left and right in the rope arranging process is avoided.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a novel elevator;

FIG. 2 is a schematic view of the hidden housing of FIG. 1;

FIG. 3 is a schematic view of the structure of FIG. 2 after concealing the frame and seat belt;

FIG. 4 is an exploded view of the internal structure of the roping axle;

FIG. 5 is a cross-sectional view of the roping axle;

FIG. 6 is a schematic diagram of a driving apparatus;

FIG. 7 is an exploded view of the drive assembly;

FIG. 8 is an exploded view of the inner stator and the main shaft;

FIG. 9 is a cross-sectional view of the outer barrel;

FIG. 10 is an exploded view of the brake output mechanism;

FIG. 11 is a cross-sectional view of the drive ring, inner ring member and outer ring member after engagement;

FIG. 12 is a schematic view of the first brake mechanism;

FIG. 13 is a schematic diagram of a control device;

FIG. 14 is an exploded view of the junction of the driving rocker arm and the driven rotating rod;

FIG. 15 is a schematic view of the connection structure of the lift handle and the pull rod;

FIG. 16 is a cross-sectional view of the junction of the drive rocker arm and the driven turning rod;

FIG. 17 is a schematic view of the rope guide;

FIG. 18 is an exploded view of the rope guide;

FIG. 19 is a schematic view of the rope tensioner;

FIG. 20 is a schematic view of the internal structure of the rope tensioner;

Fig. 21 is an exploded view of the rope tensioner.

In the figure: 1. a frame; 11. a mounting plate; 12. a housing; 121. a roller; 2. a rope winding shaft; 21. a partition plate; 22. a slave ring; 3. a driving device; 31. a main shaft; 311. an internal tooth center wheel; 32. an external rotation driver; 321. an inner stator; 322. an outer rotor; 33. a brake type output mechanism; 331. a planet carrier A; 3311. an output shaft; 3312. a planet wheel A; 3313. an output gear; 332. a drive ring; 3321. a drive insert; 333. an inner ring member; 3331. a sun gear A; 3332. a roller; 3333. a first elastic pushing member; 3334. a concave portion; 34. a speed reducing mechanism; 35. fixing the end cover; 36. an outer cylinder; 361. an outer ring member; 37. a first braking mechanism; 371. braking disc; 372. a brake block; 373. a second elastic pushing member; 374. a first toggle rod; 4. a second brake mechanism; 41. a drum brake piece; 42. a brake arm; 43. a third elastic pushing member; 5. a control device; 51. driving a rocker arm; 52. a driven rotating rod; 521. a first plectrum; 522. a second pulling piece; 53. an adapter; 531. a first latch; 54. a clamping block; 541. a second latch; 55. a rotating shaft; 56. a top block; 57. a first elastic member; 58. a pull rod; 59. lifting a handle; 6. a rope control means; 61. rope arranging device; 611. a reciprocating screw rod; 6111. a thread groove; 612. a sliding table; 6121. a shifting block; 613. a rope guiding mechanism; 6131. a rope guide frame; 6132. the first guide wheel; 6133. a guide rod; 62. a rope tightener; 621. a driving shaft; 6211. a driving pulley; 622. a driven shaft; 6221. a driven pulley; 623. a motor; 6231. a sun gear B; 624. a safety type output mechanism; 6241. a friction fixing ring; 6242. wing edges; 6243. a planet carrier B; 6244. a planet wheel B; 6245. a friction plate;

a. a first direction; b. a second direction; l, serial transmission path.

Detailed Description

The following description of the technical solutions in the embodiments of the present invention will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature "above," "over" and "on" a second feature may be a first feature directly above or obliquely above the second feature, or simply indicate that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

Referring to fig. 1-12, a novel elevator is shown comprising an axially hollow roping shaft 2, a drive means 3 arranged inside said roping shaft 2, and a rope arranged on said roping shaft 2; the drive device 3 comprises a main shaft 31, an external rotation driver 32, a brake type output mechanism 33 and a first brake mechanism 37 for braking the main shaft 31; the outer rotary driver 32 includes an inner stator 321 sleeved on the main shaft 31 and an outer rotor 322 sleeved on the outer periphery of the inner stator 321; the inner stator 321 and the main shaft 31 can rotate relatively; an inner tooth center wheel 311 with an inner tooth ring is arranged at the end of the main shaft 31 penetrating through the inner stator 321;

The brake output mechanism 33 includes a planet carrier a 331, a driving ring 332, an inner ring 333, and an outer ring 361, which are concentrically disposed with the main shaft 31; the end face of the planet carrier A331 facing away from the main shaft 31 is provided with a concentric output shaft 3311 and a plurality of planet gears A3312 arranged along the circumference of the output shaft 3311; the driving ring 332 and the inner ring 333 are sequentially sleeved on the output shaft 3311, a sun gear a 3331 passing through the driving ring 332 is arranged on the end surface of the inner ring 333 opposite to the planet gear a 3312, and the sun gear a 3331, the planet gears a 3312 and the internal tooth center gear 311 form a planetary gear train structure; the outer ring 361 is embedded on the outer periphery of the inner ring 333 and forms a roller 3332 type one-way clutch structure with the outer ring; the driving ring 332 is fixedly connected with the outer rotor 322, and a driving insert 3321 for unlocking the outer ring 361 and the inner ring 333 and driving the inner ring 333 to rotate is provided on an end surface of the driving ring 332 facing the inner ring 333;

The inner stator 321 and the outer ring 361 remain fixed against rotation; the output shaft 3311 is connected to the rope winding shaft 2 by a transmission through one end of the inner ring 333.

Specifically, in the initial state, the first braking mechanism 37 brakes the main shaft 31 so as to be kept in a fixed and non-rotating state; when the rope needs to be wound and unwound, the external rotation driver 32 works, the external rotor 322 rotates, the external rotor 322 drives the driving ring 332 to rotate, the driving plug-in component 3321 on the driving ring 332 drives the inner ring 333 to rotate, and the sun gear A3331 on the inner ring 333 rotates; in the case that the internal gear center 311 is fixed without rotation, the plurality of planetary gears a 3312 revolve around the sun gear a 3331, so that the planet carrier a 331 rotates, and the rope winding shaft 2 is driven to rotate by the output shaft 3311 on the planet carrier a 331, thereby winding and unwinding the rope. When the external rotation type driver 32 stops working, the driving ring 332 is fixed and not rotated, and when the rope winding shaft 2 is to rotate to pay out the rope, the inner ring 333 is locked with the outer ring 361 in a unidirectional manner, and when the internal tooth center 311 and the sun gear a 3331 are fixed and not rotated at the same time, the planet carrier a 331 cannot rotate, and the output shaft 3311 on the planet carrier a 331 keeps the rope winding shaft 2 fixed and not rotated, so that the rope cannot be paid out.

In the above process, the planet carrier a 331 is jointly fixed by the internal tooth central gear 311 and the sun gear a 3331, that is, the main shaft 31, the external rotation driver 32 and the external ring member jointly load the torque force of the lifting object, so that the external rotation driver 32 is prevented from bearing too large load, the service life of the driving device 3 is effectively ensured, and the driving device is safer.

In addition, when the external rotation type driver 32 fails and cannot be driven, the internal gear center 311 can be rotated by adjusting the braking force of the first braking mechanism 37 to the main shaft 31, and in the case where the inner ring 333 and the sun gear a 3331 are fixed without rotation, the lifting object applies torsion to the rope winding shaft 2 through the rope, and the planet gears a 3312 on the planet carrier a 331 rotate around the ring gear of the internal gear center 311, so that the rope is released from the rope winding shaft 2. In combination with the practical situation, the operator carries the novel lifter, fixes the end part of the rope on a high-position fixed object, realizes lifting by controlling the external rotation driver 32, and realizes landing by reducing the braking force of the first braking mechanism 37 on the main shaft 31 when the external rotation driver 32 fails; naturally, the magnitude of the braking force of the first braking mechanism 37 on the spindle 31 affects the landing speed.

Specifically, referring to fig. 10 and 11, the outer circumferential surface of the inner ring 333 is provided with a plurality of recesses 3334 disposed at predetermined intervals along the circumferential direction, the bottom surface of the recess 3334 is provided with an inclined surface inclined along the circumferential direction, and the inclined surface forms a certain wedge angle with the engagement surface of the outer ring 361; a roller 3332 and a first elastic pushing member 3333 for pushing the roller 3332 in a narrow direction of the wedge angle are accommodated in the concave portion 3334; the driving inserts 3321 on the driving ring 332 are in one-to-one correspondence with the concave portions 3334, the driving inserts 3321 are inserted into the concave portions 3334, and the driving inserts 3321 are positioned between the rollers 3332 and one side of the concave portions 3334 close to the narrow direction of the wedge angle.

In other words, as illustrated in the angle of fig. 11, when the outer rotary driver 32 drives the rope winding shaft 2 to pay out rope, the outer rotor 322 drives the driver to rotate, and the driving insert 3321 on the driver pushes the roller 3332 towards the direction of the first elastic pushing member 3333, so as to drive the inner ring member 333 to rotate clockwise in fig. 11; when the outer rotary driver 32 drives the rope winding shaft 2 to wind up the rope, the driving plug 3321 on the driver directly pushes the side wall of the concave part 3334 of the inner ring 333, so as to drive the inner ring 333 to rotate anticlockwise in fig. 11; when the external rotation driver 32 is not working, the driving insert 3321 is fixed in position, if the rope winding shaft 2 needs to pay out the rope, the inner ring 333 needs to rotate clockwise in fig. 11, on one hand, the driving insert 3321 blocks the side wall of the concave portion 3334 of the inner ring 333, on the other hand, the first elastic pushing member 3333 pushes the roller 3332 to the narrow direction of the wedge angle so as to be blocked, and the inner ring 333 is fixed but not rotated; in this way, when the external rotation type driver 32 does not rotate, the torsion force applied to the rope winding shaft 2 is borne by three parts of the external ring 361, the external rotation type driver 32 and the main shaft 31, so that the safety is improved.

In particular, in order to fix the outer ring 361 conveniently, referring to fig. 7 and 9, the outer ring 36 is further included, the outer ring 36 is hollow in an axial direction, the main shaft 31, the outer rotary driver 32 and the brake output mechanism 33 are disposed in the outer ring 36, and the outer ring 361 is fixedly connected with the outer ring 36. One end of the inner stator 321 is provided with a fixed end cover 35, and the outer cylinder 36 is fixedly connected with the fixed end cover 35. This also maintains the compactness of the overall structure.

In addition, in order to facilitate the transmission of the output shaft 3311 to the sheave, referring to fig. 5 and 10, a driven ring 22 is fixed inside the sheave shaft 2; an output gear 3313 is connected to the end of the output shaft 3311 passing through the inner ring 333, and a speed reducing mechanism 34 is connected to the output gear 3313; the speed reducing mechanism 34 may be a planetary speed reducer, the outer cylinder 36 is provided with an inner gear ring, the speed reducing mechanism 34 is matched with the outer cylinder, the driven ring 22 may be used as a planet carrier of the last stage of the planetary speed reducer, and the driven ring 22 is driven to rotate, so that the rope winding shaft 2 is driven to rotate. It is emphasized that by stopping the external rotation driver 32 or by braking the main shaft 31 to fix the planet carrier a 331, so as to achieve braking of the rope reel 2 before the speed reducing mechanism 34, the braking force required for braking the rope reel 2 can be reduced, the braking effect is better, and the braking reaction is quicker.

In some specific embodiments, referring to fig. 1-3, the novel lifter may further comprise a frame 1, wherein a mounting plate 11 is provided on the frame 1, and the inner stator 321 is fixed on the frame 1 or the mounting plate 11; the frame 1 is covered with a shell 12. Wherein, the fixed end cover 35 can be fixed on the frame 1 or the mounting plate 11, namely, the fixation of the outer cylinder 36 and the inner stator 321 is realized; in addition, the frame 1 is integrally formed into a frame structure, and can also be designed to be attached to the cambered surface shape of the back according to human engineering, and a safety belt is provided for an operator to bear, wherein the safety belt can comprise shoulder straps, waistbands and leg straps. The mounting plate 11 in this embodiment may have a double-layer structure to facilitate the mounting of various gear sets, bearings, and the like.

In some specific embodiments, a first braking mechanism 37 with a specific structure is provided, referring to fig. 3, 8 and 12, a brake disc 371 is disposed on the other end portion of the main shaft 31 opposite to the inner tooth center wheel 311; the first braking mechanism 37 comprises a braking block 372 for braking the braking disc 371 and a second elastic pushing member 373 for pushing the braking block 372 towards the braking disc 371; the brake block 372 is connected with a first toggle rod 374, and the brake block 372 is far away from the brake disc 371 by toggling the first toggle rod 374; the first brake mechanism 37 is in a braking state in an initial state, and the magnitude of the braking force of the first brake mechanism 37 on the brake disc 371 is controlled by the control device 5. In other words, without pulling the first pulling lever 374, the second elastic pushing member 373 pushes the brake block 372 against the brake disc 371, so that the main shaft 31 is fixed and does not rotate; when the spindle 31 needs to be rotated, the control device 5 is used for poking the first poking rod 374, the second elastic pushing piece 373 is extruded, and the first poking rod 374 releases the brake of the brake disc 371; of course, the braking force of the brake block 372 on the brake disc 371 is affected by the magnitude of the shifting amplitude of the first shifting lever 374.

In some specific embodiments, in order to further improve the safety of the novel driver, referring to fig. 4, a second brake mechanism 4 is disposed in the rope winding shaft 2, the second brake mechanism 4 is a drum brake structure, the second brake mechanism 4 includes two arc-shaped drum brake pieces 41 for braking the inner peripheral wall of the rope winding shaft 2, each end of the two drum brake pieces 41 is hinged, an expansion and contraction piece is disposed between each end of the two drum brake pieces 41 that are not connected, and the expansion and contraction piece is connected with a brake arm 42; the brake arm 42 is rotated to drive the expansion and contraction member to rotate, so that the distance between the ends of the two drum brake pieces 41 which are not connected is enlarged or reduced; the second braking mechanism 4 comprises a third elastic pushing piece 43 for driving the braking arm 42 to rotate, and the third elastic pushing piece 43 keeps the distance between the non-connected ends of the two drum braking pieces 41 in a reduced trend; the second braking mechanism 4 is in an initial state and is in a non-braking state. In other words, when the first braking mechanism 37 fails to brake the main shaft 31 without moving, in order to avoid a falling accident caused by uncontrolled rotation of the rope winding shaft 2, the rope winding shaft 2 may be directly braked by the second braking mechanism 4, the braking arm 42 may be toggled by the control device 5, so that the third elastic pushing member 43 is pressed, and the expansion and contraction member rotates to expand the two drum brake sheets 41, so as to brake the inner peripheral wall of the rope winding shaft 2. The braking principle of the second braking mechanism 4 can refer to the existing drum brake structure or refer to an electric lifter with a Chinese patent publication No. CN 211419422U.

In some specific embodiments, for ease of operation and to reduce the structural complexity of the novel drive device 3, with reference to fig. 1, 12, 13, 14, 15 and 16, the first braking mechanism 37 and the second braking mechanism 4 are controlled by the same control device 5; the control device 5 is a rocker arm type control device 5; the rocker arm control device 5 comprises a driven rotating rod 52 and a driving rocker arm 51 for realizing the rotation of the driven rotating rod 52, and the driven rotating rod 52 is provided with a first shifting piece 521 for shifting the first shifting rod 374 and a second shifting piece 522 for shifting the brake arm 42; when the driving rocker arm 51 is located at the initial position, neither the first paddle 521 nor the second paddle 522 triggers the first lever 374 nor the brake arm 42; when the driving rocker arm 51 rotates in the first direction a at the initial position, the first shifting piece 521 shifts the first shifting rod 374, and when the driving rocker arm 51 rotates in the second direction b at the initial position, the second shifting piece 522 shifts the brake arm 42; the first direction a and the second direction b are opposite.

In other words, in actual application, when the driving rocker arm 51 is located at the initial position, the second brake mechanism 4 is in a non-braking state, the first brake mechanism 37 is in a braking state, and the braking force of the first brake mechanism 37 is the maximum; when the driving rocker arm 51 is rotated in the first direction a at the initial position, the second brake mechanism 4 is kept in the braking state, but the braking force of the first brake mechanism 37 on the main shaft 31 is gradually reduced; when the driving rocker arm 51 rotates in the second direction b at the initial position, the first braking mechanism 37 keeps outputting the maximum braking force to the spindle 31, and the braking force of the second braking mechanism 4 to the rope winding shaft 2 gradually increases.

In the above-mentioned scheme, in order to adapt to the operation habit of the operator, referring to fig. 14 and 16, an adaptor 53 is connected to the end of the driven rotating rod 52, a cavity is formed in the driving rocker arm 51, one end of the adaptor 53 is disposed in the driving rocker arm 51, the end has an outer circumferential surface, and a plurality of first latches 531 spaced at a predetermined distance are disposed on the outer circumferential surface; a movable clamping block 54 is arranged in the driving rocker arm 51, and a second clamping tooth 541 which is in clamping fit with the first clamping tooth 531 is arranged on the clamping block 54; the second latch 541 is snapped into or separated from the first latch 531 by moving the latch 54. Thus, when the second latch 541 is snapped into the first latch 531, the driving rocker arm 51 can rotate the driven rotating rod 52 via the adaptor 53; when the initial position needs to be adjusted, the second latch 541 may be separated from the first latch 531, and then after the driving rocker arm 51 is rotated to a proper position, the second latch 541 is snapped onto the first latch 531, so as to effectively connect the latch 54 with the adapter 53. Thereby meeting the operation habits of different operators.

Further, in order to conveniently control the clamping block 54 to achieve the buckling or separation of the second latch 541 from the first latch 531, referring to fig. 15, a pull rod 58 is disposed in the driving rocker arm 51, and one end of the pull rod 58 is connected to the clamping block 54; the other end of the pull rod 58 is connected with a lifting handle 59, the lifting handle 59 is hinged to the driving rocker arm 51, and a second elastic piece is arranged on the lifting handle 59 so as to reset the lifting handle 59; the pull rod 58 is pulled up by rotating the lifting handle 59 around its hinge with the driving rocker arm 51, thereby achieving the separation of the latch block 54 from the adapter 53. Thus, when the operator holds the driving rocker arm 51 and needs to adjust the initial position, the operator grips the lifting handle 59 with fingers, so that the pull rod 58 is lifted, and the clamping block 54 is separated from the adapter 53; while holding the pull handle 59, the driving rocker arm 51 is rotated to a position adapted to the operation habit, and then the pull handle 59 is released, and the second elastic member resets the pull handle 59, thereby resetting the pull rod 58, and the clip block 54 is reconnected to the adapter 53. The second elastic member may be a torsion spring provided at the hinge of the lift handle 59 and the driving rocker arm 51.

In the above-mentioned scheme, in order to adapt to the stature of operators with different obesity degrees, referring to fig. 14, 15 and 16, the adaptor 53 is hinged to the driven rotating rod 52 through a rotating shaft 55, and the axis of the rotating shaft 55 is perpendicular to the axis of the driven rotating rod 52; the end face of the adapter 53, connected with the driven rotating rod 52, is provided with a groove, a top block 56 is arranged in the groove, and a first elastic piece 57 is arranged between the top block 56 and the bottom of the groove; the end part of the driven rotating rod 52 enters the groove, and the rotating shaft 55 is arranged in the groove; the end surface of the driven rotating rod 52 is a cambered surface, the first elastic piece 57 enables the top block 56 to form extrusion fit with the end surface of the driven rotating rod 52, and when the axial core angle of the adapter piece 53 and the axial core angle of the driven rotating rod 52 are increased, the compression amount of the first elastic piece 57 is increased. In other words, the driving rocker arm 51 is located at one side of the operator, and when the operator is relatively fat in size, the driving rocker arm 51 can be pushed outward to facilitate the operation thereof; the first elastic member 57 can push the top block 56, and the top block 56 presses the end surface of the driven rotating rod 52, so that the driving rocker arm 51 has an inward leaning trend, and the driving rocker arm 51 is prevented from falling outwards without resetting, thereby affecting the operation of operators. The "inner" and "outer" mentioned above are relative to the operator. More specifically, the driven rotating lever 52 is rotatably provided on the frame 1 or the mounting plate 11. Wherein, the first elastic member 57 may be a spring.

In some specific embodiments, in order to fully utilize the rope winding space on the rope winding shaft 2, referring to fig. 3, 17 and 18, a rope control device 65 for adjusting and controlling the rope on the rope winding shaft 2 is arranged on the outer side of the rope winding shaft 2, the rope control device 65 comprises a rope discharger 61, the rope discharger 61 comprises a reciprocating screw 611 and a sliding table 612 sliding along the reciprocating screw 611 in a reciprocating manner, and the reciprocating screw 611 is in transmission connection with the rope winding shaft 2 and is provided with two thread grooves 6111 with the same thread pitch and opposite rotation directions; wedge-shaped surfaces are formed at the transition positions of the two ends of the thread groove 6111 and the body of the reciprocating screw rod 611, a shifting block 6121 is arranged in the sliding table 612, and the shifting block 6121 is connected with one thread groove 6111 of the reciprocating screw rod 611 to realize the reciprocating motion of the sliding table 612 on the reciprocating screw rod 611; the sliding table 612 is provided with a rope guiding mechanism 613, the rope guiding mechanism 613 comprises a rope guiding frame 6131 and two first guide wheels 6132 arranged on the rope guiding frame 6131 for clamping a rope, the two first guide wheels 6132 are arranged along the axial direction of the rope winding shaft 2, the outer circumferential surfaces of the two first guide wheels 6132 are oppositely arranged, and the rope is clamped between the outer circumferential surfaces of the two first guide wheels 6132; the outer circumferential surface of the first guide wheels 6132 is concave, and a passage capable of clamping the rope is formed between the two first guide wheels 6132.

Specifically, the shifting block 6121 moves along one thread groove 6111 on the reciprocating screw rod 611, when the shifting block 6121 moves to the end of the thread groove 6111, the shifting block 6121 jumps to the other thread groove 6111 through a wedge surface to move in the opposite direction, and thus the reciprocating movement of the sliding table 612 is realized in a circulating way; wherein, the sliding table 612 is connected with a positioning groove or a positioning rod arranged on the bracket or the mounting plate 11 to prevent the sliding table 612 from rotating; the reciprocating screw rod 611 is in transmission connection with the rope winding shaft 2, the rope is arranged on a rope guide mechanism 613 on the sliding table 612, and when the rope winding shaft 2 rotates, the sliding table 612 slides back and forth to realize automatic rope arrangement of the rope winding shaft 2 in the lifting process. Because the ropes swing left and right in the rope arrangement process, the ropes are easy to rub, the ropes are clamped through the two first guide wheels 6132, the two first guide wheels 6132 are rotatably arranged on the rope guide frame 6131, the friction born by the ropes is effectively reduced, and accidents caused by rope breakage are avoided.

Further, in order to reduce the friction of the rope, referring to fig. 17 and 18, the sliding table 612 is provided with a guide rod 6133, and the axis of the guide rod 6133 is perpendicular to the axis of the rope winding shaft 2; the rope guide 6131 is slidably provided on the guide rod 6133. In this way, the rope has a certain range of swinging space in the axial direction of the guide rod 6133, and friction to which the rope is subjected is reduced.

In addition, in order to avoid falling accidents caused by rope breakage, a plurality of ropes are adopted on a rope winding shaft 2 of the novel driver, the rope winding shaft 2 is divided into sections with equal length by a plurality of partition plates 21, and each section is wound with one rope; the sliding table 612 of the rope guide 61 is provided with rope guide mechanisms 613 which are the same as the ropes in number and are arranged along the same distance. In this embodiment three ropes are used in particular. So even if a certain rope breaks, the lifting object can be safely lifted.

In some embodiments, when the rope is not pulled by the lifter and the rope needs to be paid out, in order to avoid the rope winding into a cluster in the housing 12, referring to fig. 19, 20 and 21, the rope control device 65 further comprises a rope tightener 62, wherein the rope tightener 62 comprises a driving shaft 621 and a driven shaft 622, the driving shaft 621 is provided with a driving pulley 6211, and the driven shaft 622 is provided with a driven pulley 6221, and the driving pulley 6211 and the driven pulley 6221 are respectively positioned at two sides of the rope to clamp the rope; the driving shaft 621 is in transmission connection with a motor 623; a buffer spring is connected to the driving shaft 621 or/and the driven shaft 622, and the buffer spring urges the driving pulley 6211 or the driven pulley 6221 to press the rope. In other words, when the rope is not pulled by the lifter, the rope may accumulate in the housing 12 and not be discharged, the driving pulley 6211 and the driven pulley 6221 clamp the rope under the pushing of the buffer spring, and the driving pulley 6211 drives the rope to be discharged under the driving of the motor 623. Of course, the driving pulley 6211 and the driven pulley 6221 on the rope tensioner 62 are the same in number as the ropes. In addition, when the rope is pulled by a lifter, the buffer spring is pressed, the driving pulley 6211 and the driven pulley 6221 are separated, and the rope is not driven by the rope tightener 62.

Referring to fig. 20, the number of the driving shafts 621 and the driven shafts 622 is plural, the driving shafts 621 and the driven shafts 622 are in one-to-one correspondence, the driving shafts 621 and the motors 623 are meshed with each other through gear rings to form a serial transmission path L, and the driving shaft 621 closest to the motors 623 on the serial transmission path L is connected with the buffer spring; the ropes disengage the gears on the corresponding drive shafts 621 from the tandem drive path L by pressing the buffer springs. Thus, when the rope is pulled by the lifter, the buffer spring is extruded, the gear on the driving shaft 621 extruded by the rope is separated from the serial transmission path L, the motor 623 does not drive the driving shaft 621 to rotate, and the rope is not driven by the rope tightener 62.

In particular, when the speed of the rope driven by the rope tightener 62 is not matched with the speed of the rope driven by the rope winding shaft 2, the rope may slip on the driving pulley 6211 and the driven pulley 6221, so that the rope is worn to be easily broken. Referring to fig. 21, the motor 623 is connected to a safety output mechanism 624, the safety output mechanism 624 including a friction fixing ring 6241 having an annular gear, a planet carrier B6243, a planet wheel B6244 provided on the planet carrier B6243, and a sun wheel B6231 connected to the motor 623; the sun gear B6231, the planet gear B6244 and the friction fixing ring 6241 form a planetary gear train structure; the planet carrier B6243 is provided with a gear positioned at the first position of the serial transmission path L; an adjustable braking mechanism for providing a prescribed braking force for the friction fixing ring 6241 is arranged outside the friction fixing ring 6241; the friction fixing ring 6241 is provided with a wing edge 6242, and the adjustable mechanism comprises two friction plates 6245 respectively clamped at two sides of the wing edge 6242, and the braking force on the friction fixing ring 6241 is adjusted by controlling the distance between the two friction plates 6245. Specifically, under normal conditions, the friction force of the friction plate 6245 on the friction fixing ring 6241 is greater than the friction force of the rope on the driving pulley 6211 and the driven pulley 6221, and the motor 623 can drive the planetary gear B6244 to rotate, so as to drive the driving shaft 621 on the serial transmission path L to rotate; when a speed difference of driving ropes occurs between the rope tightener 62 and the rope winding shaft 2, the friction force of the ropes on the driving pulley 6211 and the driven pulley 6221 is larger than the friction force of the friction plate 6245 on the friction fixing ring 6241, namely the rotation resistance of the planet wheel B6244 is larger than the rotation resistance of the friction fixing ring 6241, the friction fixing ring 6241 rotates and the planet wheel B6244 is fixed, so that the rotation speed of the rope winding shaft 2 is matched, and the abrasion of the ropes is avoided.

In the above-mentioned solution, in order to further avoid the rope from being worn, a rope positioning frame is provided between the rope guide 61 and the rope tightener 62, at least two second guide wheels are provided on the rope positioning frame, the second guide wheels are arranged along the axial direction of the rope winding shaft 2, the outer circumferential surfaces of the two adjacent second guide wheels are oppositely arranged, and the rope is clamped between the outer circumferential surfaces of the two second guide wheels; the outer circumferential surface of the second guide wheels is concave, and a channel capable of clamping the rope is formed between the two second guide wheels; the channel formed between each two of the second guide wheels vertically corresponds to a pair of driving and driven pulleys 6211, 6221 that grip the rope. In this way, the transition of the rope from the rope reel 61 to the rope tensioner 62 is facilitated.

In addition, in order to facilitate the installation of the components such as the driving shaft 621 and the driven shaft 622, referring to fig. 20, both ends of the driving shaft 621 and the driven shaft 622 are respectively provided on two fixing plates; the gears on the serial transmission path L are arranged in the fixed plate; a sliding groove is arranged in the fixed plate, and when the buffer spring is extruded, the driving shaft 621 or the driven shaft 622 corresponding to the buffer spring slides along the sliding groove. The fixing plate may be mounted on the bracket or the mounting plate 11.

In some embodiments, in order to protect the housing 12, the housing 12 is provided with rollers 121, so that when the electric lifter is lifted, the rollers 121 can roll along the outer wall of the building to avoid damaging the housing 12.

The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.

Claims

1. The rope control device is characterized by comprising a rope guider, wherein the rope guider comprises a reciprocating screw rod and a sliding table which slides back and forth along the reciprocating screw rod, the reciprocating screw rod is in transmission connection with the rope winding shaft, and two thread grooves with the same thread pitch and opposite rotation directions are formed in the reciprocating screw rod; wedge-shaped surfaces are formed at the transition positions of the two ends of the thread groove and the reciprocating screw rod body, a shifting block is arranged in the sliding table, and the shifting block is connected with one thread groove of the reciprocating screw rod to realize the reciprocating motion of the sliding table on the reciprocating screw rod; the sliding table is provided with a rope guiding mechanism, the rope guiding mechanism comprises a rope guiding frame and two first guide wheels which are arranged on the rope guiding frame to clamp a rope, the two first guide wheels are arranged along the axial direction of the rope winding shaft, the outer circumferential surfaces of the two first guide wheels are oppositely arranged, and the rope is clamped between the outer circumferential surfaces of the two first guide wheels;

The outer circumferential surfaces of the first guide wheels are concave, and a channel capable of clamping the rope is formed between the two first guide wheels;

the rope control device further comprises a rope tightener, wherein the rope tightener comprises a driving shaft and a driven shaft, the driving shaft is provided with a driving pulley, the driven shaft is provided with a driven pulley, and the driving pulley and the driven pulley are respectively positioned at two sides of the rope to clamp the rope; the driving shaft is in transmission connection with the motor; a buffer spring is connected to the driving shaft or/and the driven shaft, and the buffer spring drives the driving pulley or the driven pulley to press the rope;

the number of the driving shafts and the driven shafts is multiple, the driving shafts and the driven shafts are in one-to-one correspondence, the driving shafts and the motors are in annular buckling through gears to form a serial transmission path, and the driving shaft closest to the motors on the serial transmission path is connected with the buffer spring; the rope is used for enabling the gear on the corresponding driving shaft to be separated from the serial transmission path by pressing the buffer spring;

The motor is connected with a safety type output mechanism, and the safety type output mechanism comprises a friction fixing ring with an annular gear, a planet carrier B, a planet wheel B arranged on the planet carrier B and a sun wheel B connected to the motor; the sun gear B, the planet gear B and the friction fixing ring form a planetary gear train structure; the planet carrier B is provided with a gear positioned at the first position of the serial transmission path; an adjustable braking mechanism for providing a specified braking force for the friction fixing ring is arranged outside the friction fixing ring;

the friction fixing ring is provided with a wing edge, the adjustable mechanism comprises two friction plates which are respectively clamped at two sides of the wing edge, and the braking force on the friction fixing ring is adjusted by controlling the distance between the two friction plates.

2. A rope control device as claimed in claim 1, in which the slide is provided with a guide bar, the axis of which is perpendicular to the axis of the rope winding shaft; the rope guide frame is slidably arranged on the guide rod.

3. A rope control device according to claim 1 or 2, wherein a plurality of ropes are arranged on the rope winding shaft, and rope guiding mechanisms which are the same in number as the ropes and are arranged along the same distance are arranged on the sliding table of the rope arranging device.

4. A rope control device as defined in claim 1, including two fixed plates, the two ends of the driving shaft and the driven shaft being respectively provided on the two fixed plates; the gears on the serial transmission path are arranged in the fixed plate; a sliding groove is formed in the fixing plate, and when the buffer spring is extruded, a driving shaft or a driven shaft corresponding to the buffer spring slides along the sliding groove.

5. A rope control device as defined in claim 1, wherein a rope positioning frame is provided between the rope guide and the rope tightener, at least two second guide wheels are provided on the rope positioning frame, the second guide wheels are arranged along the axial direction of the rope winding shaft and the outer circumferential surfaces of the two adjacent second guide wheels are oppositely arranged, and the rope is clamped between the outer circumferential surfaces of the two second guide wheels; the outer circumferential surface of the second guide wheels is concave, and a channel capable of clamping the rope is formed between the two second guide wheels; the channel formed between every two second guide wheels vertically corresponds to the driving pulley and the driven pulley of the pair of clamping ropes.