Lifting transport mechanism and method of operation thereof

Abstract

The present application belongs to the technical field of lifting transportation mechanism, and particularly relates to a lifting transportation mechanism and a working implementation method thereof. The lifting transportation mechanism comprises a transmission box, two winding rollers are rotationally arranged in the transmission box, and a steel wire rope is wound on the outer wall of the winding roller; a positioning rod is radially arranged on the outer wall of the rotating shaft of the winding roller; a limiting mechanism is slidingly arranged between the two rotating shafts; when the rotating shaft rotates to the last turn, the damping rod of the limiting mechanism is extended, and the damping rod abuts against the positioning rod to slow down the inertia when the winding roller stops. When the winding roller is unwound to the last turn by the limiting mechanism, the damping rod abuts against the positioning rod to limit the rotating speed of the rotating shaft, thereby avoiding the reverse pulling force of the steel wire rope on the winding roller when the motor instantaneously stops.

Description

Technical Field

[0001] This invention belongs to the technical field of lifting and transporting mechanisms, and particularly relates to lifting and transporting mechanisms and their operation methods. Background Technology

[0002] Existing lifting and transport mechanisms typically use a motor-driven take-up roller (equipped with a wire rope or steel belt) to control the lifting and lowering of the lifting claws. They usually employ fixed-stroke distributed lifting (i.e., lifting a fixed distance each time, accumulating to the desired height through multiple operations).

[0003] In actual use, when the lifting claw descends to the required height and the motor stops, the inertia of the lifting claw causes the wire rope to pull in the opposite direction, which may cause the wire rope to fall off.

[0004] Therefore, how to prevent the wire rope from coming loose on the lifting and transporting mechanism is a technical problem that urgently needs to be solved in this field.

[0005] It should be noted that the information disclosed in this background section is only for understanding the background technology of this application concept, and therefore, the above description is not considered to constitute information related to the technology. Summary of the Invention

[0006] This disclosure provides at least one lifting and transporting mechanism and its operation method.

[0007] In a first aspect, embodiments of this disclosure provide a lifting and transporting mechanism, including: The transmission box contains two take-up rollers that rotate inside, with the steel wire rope wound around the outer wall of the take-up rollers. The positioning rod is radially disposed on the outer wall of the shaft of the take-up roller and located on the bottom wall of the transmission box; The limiting mechanism is slidably disposed between the two positioning rods; When the rotating shaft rotates to its last revolution, the damping rod of the limiting mechanism extends outward and abuts against the positioning rod to reduce the inertia of the take-up roller when the motor stops.

[0008] In one optional embodiment, the limiting mechanism includes a limiting cylinder disposed on the bottom wall of the transmission box; The damping rod is vertically fixed to the end of the piston rod of the limiting cylinder, and a sliding groove is opened at each end; A damping limiting component is slidably disposed within the sliding groove and is adapted to limit the positioning rod; The return spring has its two ends respectively set on the damping limiter and the side wall of the sliding groove; During unwinding, when the shaft rotates to its last revolution, the limit cylinder drives the damping rod to move in the direction of the shaft. The positioning rod rotates forward until it abuts against the damping limiter, pushing the damping limiter to retract into the sliding groove and lock itself; During winding, the positioning rod rotates in the opposite direction until it comes into contact with the damping limiter, so that the damping limiter disengages from its self-locking and slides outward.

[0009] In one optional embodiment, the damping limiting member includes: a limiting block, which is slidably disposed in the sliding groove, and a return spring is fixed to its inner end wall; The positioning plate is hinged to the side wall of the limiting block and has a gap between it and the limiting block; A compression spring is disposed between the limit block and the positioning plate; The positioning rod rotates forward until it abuts against the limiting block, thereby pushing the limiting block into the sliding groove so that the positioning plate is limited by the damping rod. The positioning rod rotates in the opposite direction until it abuts against the positioning plate, pushing the positioning plate to rotate upward around the hinge point, so that the positioning plate is released from the limit of the damping rod.

[0010] In one optional embodiment, a positioning groove is formed in the sidewall of the sliding groove; A positioning block is provided on the side wall of the positioning plate near the positioning groove, and the positioning block is adapted to be inserted into the positioning groove.

[0011] In one optional embodiment, an inclined surface is provided at the outer end of the limiting block near the positioning rod, and the positioning rod is adapted to abut against the inclined surface.

[0012] In one alternative embodiment, the two positioning rods are respectively disposed on the same side of the outer wall of the two rotating shafts, and the two rotating shafts rotate in opposite directions.

[0013] In one optional embodiment, a drive motor is provided on one side of the transmission box, the drive motor is connected to the two take-up rollers, and the drive motor is adapted to drive the two take-up rollers to rotate in opposite directions.

[0014] In one optional embodiment, it includes: a fixing frame, the two ends of which are respectively fixed to the ends of the two steel wire ropes; The two lifting claws are respectively hinged to the bottom walls at both ends of the fixed frame; The transmission box is mounted on the hoisting bracket, and the two take-up rollers are rotatably mounted inside the transmission box. One end of the wire rope is wound around the outer wall of the take-up roller, and the other end extends to be fixed on the fixed frame; The drive motor is located on the side wall of the transmission box and is connected to the winding roller drive. The positioning rod is radially disposed on the outer wall of the shaft of the take-up roller and located on the bottom wall of the transmission box; The limiting mechanism is slidably disposed between the two positioning rods; When the winding roller rotates in the forward direction, the clothes drying rod moves downward. When the shaft rotates to its last revolution, the damping rod of the limiting mechanism extends outward and abuts against the positioning rod to reduce the inertia of the take-up roller when the motor stops.

[0015] In one optional embodiment, the limiting mechanism includes a limiting cylinder disposed on the bottom wall of the transmission box; The damping rod is vertically fixed to the end of the piston rod of the limiting cylinder, and a sliding groove is opened at each end; A damping limiting component is slidably disposed within the sliding groove and is adapted to limit the positioning rod; The return spring has its two ends respectively set on the damping limiter and the side wall of the sliding groove; During unwinding, when the shaft rotates to its last revolution, the limit cylinder drives the damping rod to move in the direction of the shaft. The positioning rod rotates forward until it abuts against the damping limiter, pushing the damping limiter to retract into the sliding groove and lock itself; During winding, the positioning rod rotates in the opposite direction until it comes into contact with the damping limiter, so that the damping limiter disengages from its self-locking and slides outward.

[0016] In one optional embodiment, the damping limiting member includes: a limiting block, which is slidably disposed in the sliding groove, and a return spring is fixed to its inner end wall; The positioning plate is hinged to the side wall of the limiting block and has a gap between it and the limiting block; A compression spring is disposed between the limit block and the positioning plate; The positioning rod rotates forward until it abuts against the limiting block, thereby pushing the limiting block into the sliding groove so that the positioning plate is limited by the damping rod. The positioning rod rotates in the opposite direction until it abuts against the positioning plate, pushing the positioning plate to rotate upward around the hinge point, so that the positioning plate is released from the limit of the damping rod.

[0017] In one optional embodiment, a positioning groove is formed in the sidewall of the sliding groove; A positioning block is provided on the side wall of the positioning plate near the positioning groove, and the positioning block is adapted to be inserted into the positioning groove.

[0018] Secondly, this disclosure also provides a method for implementing the operation of a lifting and transporting mechanism, the method comprising: During unwinding, when the shaft rotates to its last revolution, the limit cylinder drives the damping rod to move in the direction of the shaft. The positioning rod rotates forward until it abuts against the damping limiter, pushing the damping limiter to retract into the sliding groove and lock itself; During winding, the positioning rod rotates in the opposite direction until it comes into contact with the damping limiter, so that the damping limiter disengages from its self-locking and slides outward.

[0019] The beneficial effects of this invention are that it provides a lifting and transporting mechanism and its operation method. When the winding roller is unwound to the last turn by the limiting mechanism, it abuts against the positioning rod to limit the rotation speed of the shaft, thus avoiding the reverse pulling force of the wire rope on the winding roller when the motor stops momentarily. Moreover, when the winding roller stops unwinding, the limiting mechanism can limit the positioning rod to prevent the winding roller from continuing to unwind if the wire rope becomes loose, thereby improving safety during use.

[0020] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention are realized and obtained through the structures particularly pointed out in the description and the drawings.

[0021] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the specific embodiments or related technologies of the present invention, the drawings used in the description of the specific embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 A perspective view of the lifting and transport mechanism provided in an embodiment of this disclosure; Figure 2 A perspective view of the transmission box and limiting mechanism provided in an embodiment of this disclosure; Figure 3 A sectional perspective view of the limiting mechanism provided in the embodiments of this disclosure; Figure 4 This is an embodiment of the present disclosure. Figure 3 A magnified view of part A in the image; Figure 5 A sectional front view of the limiting mechanism provided in the embodiments of this disclosure; Figure 6 A schematic diagram of the retraction and movement of the positioning rod pushing damping limiting component provided in an embodiment of this disclosure; Figure 7 This is a perspective view of an electric clothes drying rack provided in an embodiment of this disclosure.

[0024] In the picture: 1. Transmission box; 10. Drive motor; 11. Take-up roller; 2. Shaft; 3. Positioning rod; 4. Limiting mechanism; 41. Limiting cylinder; 42. Damping rod; 43. Damping limiting component; 44. Sliding groove; 45. Return spring; 46. Limiting block; 47. Positioning plate; 48. Compression spring; 49. Positioning groove; 50. Positioning block; 51. Inclined surface; 6. Steel wire rope; 7. Fixing frame; 8. Lifting claw. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] In this document, when it is mentioned that a first component is located on a second component, this can mean that the first component can be directly formed on the second component, or that a third component can be inserted between the first and second components. Furthermore, in the accompanying drawings, the thickness of components may be exaggerated or reduced for the purpose of effectively describing the technical content.

[0027] The terminology used herein is for the purpose of describing specific exemplary configurations only and is not intended to be limiting. As used herein, the singular articles “a,” “one,” and “the” may also be intended to include plural forms unless otherwise clearly stated herein. The terms “including,” “containing,” and “having” are inclusive.

[0028] As used herein, the phrases “in one embodiment,” “according to one embodiment,” “in some embodiments,” etc., generally refer to the fact that a particular feature, structure, or characteristic following the phrase can be included in at least one embodiment of this disclosure. Therefore, a particular feature, structure, or characteristic can be included in more than one embodiment of this disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, the terms “example,” “exemplary,” etc., are used to “serve as an example, instance, or illustration.” Any implementation, aspect, or design described herein as “example” or “exemplary” is not necessarily to be construed as preferred or superior to other implementations, aspects, or designs. Rather, the use of the terms “example,” “exemplary,” etc., is intended to present concepts in a specific manner.

[0029] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0030] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0031] like Figures 1 to 7 As shown, at least one embodiment provides a lifting and transporting mechanism, including: The transmission box 1 contains two take-up rollers 11, with a steel wire rope 6 wound around the outer wall of each take-up roller 11. The transmission box 1 is rectangular, with through holes on both side walls. One end of the steel wire rope 6 is wound around the outer wall of the take-up roller 11, and the other end extends along the through hole toward the clothesline 8. A positioning rod 3 is radially positioned on the outer wall of the rotating shaft 2 of the take-up roller 11 and located on the bottom wall of the transmission box 1. When the take-up roller 11 is driven to rotate by the drive motor 10, it drives the positioning rod 3 to rotate synchronously. A limiting mechanism 4 is slidably positioned between the two positioning rods 3. When the take-up roller 11 rotates normally to unwind the steel wire rope 6, the damping rod 42 is not pushed outward by the limiting cylinder 41, meaning that at this time, the two positioning rods 3 rotate synchronously with the rotating shaft 2 and do not contact the damping rod 42. When the rotating shaft 2 rotates to its last revolution, the damping rod 42 of the limiting mechanism 4 extends outward and abuts against the positioning rod 3 to reduce the inertia experienced by the take-up roller 11 when the motor stops. Through the setting of the limiting mechanism 4, during unwinding, when the take-up roller 11 unwinds to its last revolution, it abuts against the positioning rod 3, thus limiting the rotational speed of the rotating shaft 2. This prevents the wire rope 6 from generating a reverse pulling force on the take-up roller 11 when the motor stops momentarily. Furthermore, when the take-up roller 11 stops unwinding, the limiting mechanism 4 can limit the positioning rod 3, preventing the take-up roller 11 from continuing to unwind if the wire rope 6 becomes loose, thus improving safety during use.

[0032] Reference Appendix Figure 2 The limiting mechanism 4 includes: a limiting cylinder 41, which is disposed on the bottom wall of the transmission box 1; the limiting cylinder 41 is located between two rotating shafts 2. A damping rod 42 is vertically fixed to the piston rod end of the limiting cylinder 41, and a sliding groove 44 is respectively opened at both ends; when the damping rod 42 moves between the two rotating shafts 2, the rotating shaft 2 drives the positioning rod 3 to rotate, and the end of the positioning rod 3 is adapted to abut against the damping limiting element. A damping limiting element 43 is slidably disposed in the sliding groove 44 and is adapted to limit the positioning rod 3; a return spring 45 is disposed at both ends on the side wall of the damping limiting element 43 and the sliding groove 44 respectively; the return spring 45 is adapted to push the damping limiting element 43 to move outward. Among them, during unwinding, when the rotating shaft 2 rotates to the last revolution, the limiting cylinder 41 drives the damping rod 42 to move in the direction of the rotating shaft 2; when the unwinding roller has not rotated to the last revolution, the damping rod 42 will not move in the direction of the rotating shaft 2.

[0033] In this embodiment, the lifting of the wire rope 6 adopts a fixed stroke distribution lifting method, that is, each lifting and lowering is a fixed distance, and the desired height is accumulated through multiple operations. The limit cylinder 41 is electrically connected to the drive motor 10. When the rotating shaft 2 rotates to the last revolution, the limit cylinder 41 drives the damping rod 42 to move in the direction of the rotating shaft 2. The height of each lifting and lowering of the wire rope 6 is fixed, so it is possible to know when the rotating shaft 2 rotates to the last revolution. Furthermore, the determination of the last revolution is because the distance that the wire rope 6 moves each time it lifts and lowers is constant. After the stroke is fixed, the unwinding height of the wire rope 6 is also fixed when the unwinding roller rotates one revolution. Therefore, it is possible to determine when the unwinding roller is appropriately rotated to the last revolution. The positioning rod 3 rotates forward until it abuts against the damping limiter 43, pushing the damping limiter 43 to retract into the sliding groove 44 and lock itself. When the rotating shaft 2 drives the positioning rod 3 to rotate, the end of the positioning rod 3 pushes the damping limiter 43 to retract into the sliding groove 44. The damping limiter 43 is suitable for slowing down the rotation speed of the positioning rod 3. When the damping limiter 43 locks itself in the sliding groove 44, the positioning rod 3 stops rotating after passing the damping limiter 43. In this state, if the wire rope 6 becomes loose due to the excessive weight of the object hanging on the clothesline 8, the clothesline 8 will pull the wire rope 6 to continue moving downwards. The wire rope 6 will pull the unwinding roller to continue rotating, and the positioning rod 3 will be driven to rotate another revolution until it abuts against the damping limiter 43. At this time, the positioning rod 3 cannot pass the damping limiter 43, ensuring the safety of use. During winding, the positioning rod 3 rotates in the opposite direction until it abuts against the damping limit member 43, so that the damping limit member 43 disengages from self-locking and slides outward.

[0034] Reference Appendix Figure 3 The damping limiting member 43 includes: a limiting block 46, which is slidably disposed in the sliding groove 44, and a return spring 45 is fixed to its inner end wall; the return spring 45 is adapted to push the limiting block 46 outward. When the damping limiting member 43 is not in contact with the positioning rod 3, the limiting block 46 protrudes from the damping rod 42; the positioning plate 47 is hinged to the side wall of the limiting block 46 and has a gap between it and the limiting block 46; the compression spring 48 is disposed between the limiting block 46 and the positioning plate 47; wherein, the positioning rod 3 rotates forward to abut against the limiting block 46, pushing the limiting block 46 to retract into the sliding groove 44, and the limiting block 46 simultaneously drives the positioning plate 47 to retract into the sliding groove 44, so that the positioning plate 47 is limited by the damping rod 42; at this time, the return spring 45 is compressed by force, and since the positioning block 50 on the bottom wall of the positioning plate 47 is inserted into the positioning groove 49, the return spring 45 cannot push the limiting block 46 and the positioning plate 47 to slide outward. The positioning rod 3 rotates in the opposite direction to abut against the positioning plate 47, pushing the positioning plate 47 to flip upward around the hinge point, so that the positioning plate 47 is released from the limitation of the damping rod 42.

[0035] Continue to refer to the appendix Figure 3The sliding groove 44 has a positioning groove 49 on its side wall; the positioning plate 47 has a positioning block 50 near the positioning groove 49 on its side wall, and the positioning block 50 is adapted to be inserted into the positioning groove 49. The groove size of the positioning groove 49 is larger than that of the positioning block 50. The positioning plate 47 is pushed into the sliding groove 44 to retract until the positioning block 50 moves above the positioning groove 49. The compression spring 48 pushes the positioning plate 47 to flip downward about the hinge point, so that the positioning block 50 is inserted into the positioning groove 49. When the positioning rod 3 rotates in the opposite direction, the positioning rod 3 first abuts against the bottom wall of the positioning plate 47. As the positioning rod 3 continues to rotate, the positioning rod 3 pushes the positioning plate 47 to flip upward about the hinge point, so that the positioning block 50 is disengaged from the positioning groove 49. At this time, the return spring 45 pushes the limiting block 46 and the positioning plate 47 to slide outward.

[0036] Please refer to the attached document again. Figure 3 The limiting block 46 has an inclined surface 51 near the positioning rod 3 at its outer end, and the positioning rod 3 is adapted to abut against the inclined surface 51. The two positioning rods 3 are respectively located on the same side of the outer wall of the two rotating shafts 2, and the two rotating shafts 2 rotate in opposite directions. (See attached diagram) Figure 2 A drive motor 10 is provided on one side of the transmission box 1. The drive motor 10 is connected to the two take-up rollers 11 and is adapted to drive the two take-up rollers 11 to rotate in opposite directions.

[0037] like Figure 7 As shown, at least one embodiment provides a lifting and transporting mechanism, including: a fixed frame 7, both ends of which are fixed to the ends of two steel wire ropes 66; lifting claws 8, the two lifting claws being hinged to the bottom walls at both ends of the fixed frame 7; and a transmission box 1, which is disposed on a lifting support, with two take-up rollers 11 rotatably disposed inside the transmission box 1. One end of the wire rope 66 is wound around the outer wall of the take-up roller 1), and the other end extends to be fixed on the fixed frame 7; the drive motor 10 is located on the side wall of the transmission box 1 and is connected to the take-up roller 11; the positioning rod 3 is radially located on the outer wall of the rotating shaft 2 of the take-up roller 11 and is located on the bottom wall of the transmission box 1; the limiting mechanism 4 is slidably located between the two positioning rods 3; wherein, when the take-up roller 11 rotates in the forward direction, the clothes drying rod 8 moves downward; when the rotating shaft 2 rotates to the last revolution, the damping rod 42 of the limiting mechanism 4 extends outward, and the damping rod 42 abuts against the positioning rod 3 to reduce the inertia of the take-up roller 11 when the motor stops. Figure 7 As shown, the upper part of the lifting claw 8 is hinged to the fixed frame via a pin, allowing the claw to rotate around an axis like scissors. Simultaneously, the upper end (control end) of the claw is hinged to a central pull rod (not shown in the figure) that can slide up and down via a connecting rod. The working principle of the claw gripping an object is as follows: When the fixed frame 7 descends and the lifting claw contacts the workpiece, the central tie rod slides downward relative to the fixed frame 7 under the action of gravity, pushing the upper end of the lifting claw 8 outward through the connecting rod, causing the lower end (claw part) of the lifting claw 8 to open. When the wire rope 6 lifts the fixed frame 7, the fixed frame 7 rises first, while the central tie rod remains in place due to its own weight, forming a relative upward movement. This movement pulls the upper end of the lifting claw 8 inward through the connecting rod, thereby causing the lower end of the lifting claw 8 to simultaneously grip the workpiece inward. In this embodiment, this lifting and transporting mechanism is mainly used for lifting lighter objects.

[0038] At least one embodiment provides a method for implementing the operation of a lifting and transporting mechanism, the method comprising: During unwinding, when the rotating shaft 2 rotates to the last revolution, the limit cylinder 41 drives the damping rod 42 to move in the direction of the rotating shaft 2; The positioning rod 3 rotates forward until it abuts against the damping limit member 43, pushing the damping limit member 43 to retract into the sliding groove 44 and lock itself; During winding, the positioning rod 3 rotates in the opposite direction until it abuts against the damping limit member 43, so that the damping limit member 43 disengages from self-locking and slides outward.

[0039] In the description of the embodiments of the present invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0040] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence unless expressly indicated herein. Therefore, without departing from the teachings of the exemplary embodiments, the first element, component, region, layer, or segment discussed above may be referred to as a second element, component, region, layer, or segment.

[0041] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A lifting and transporting mechanism, characterized in that, include: The transmission box (1) has two take-up rollers (11) rotatably arranged inside, and the steel wire rope (6) is wound around the outer wall of the take-up rollers (11); The positioning rod (3) is radially arranged on the outer wall of the rotating shaft (2) of the take-up roller (11) and located on the bottom wall of the transmission box (1); The limiting mechanism (4) is slidably disposed between the two positioning rods (3); When the rotating shaft (2) rotates to the last revolution, the damping rod (42) of the limiting mechanism (4) extends out and abuts against the positioning rod (3) to reduce the inertia of the winding roller (11) caused by the motor stopping.

2. The lifting and transporting mechanism as described in claim 1, characterized in that, The limiting mechanism (4) includes: a limiting cylinder (41), which is disposed on the bottom wall of the transmission box (1); The damping rod (42) is vertically fixed to the piston rod end of the limiting cylinder (41), and a sliding groove (44) is opened at each end. The damping limiting member (43) is slidably disposed in the sliding groove (44) and is adapted to limit the positioning rod (3). The return spring (45) has its two ends respectively disposed between the damping limit member (43) and the side wall of the sliding groove (44); During unwinding, when the rotating shaft (2) rotates to the last revolution, the limiting cylinder (41) drives the damping rod (42) to move in the direction of the rotating shaft (2); The positioning rod (3) rotates forward until it abuts against the damping limit member (43), pushing the damping limit member (43) to retract into the sliding groove (44) and lock itself; During winding, the positioning rod (3) rotates in the opposite direction until it comes into contact with the damping limit member (43), so that the damping limit member (43) disengages from self-locking and slides outward.

3. The lifting and transporting mechanism as described in claim 2, characterized in that, The damping limiting member (43) includes: a limiting block (46), which is slidably disposed in the sliding groove (44), and a reset spring (45) is fixed to its inner end wall; The positioning plate (47) is hinged to the side wall of the limiting block (46) and has a gap between it and the limiting block (46); A compression spring (48) is disposed between the limiting block (46) and the positioning plate (47); Among them, the positioning rod (3) rotates in the forward direction to abut against the limiting block (46) to push the limiting block (46) into the sliding groove (44) to retract, so that the positioning plate (47) is limited by the damping rod (42); The positioning rod (3) rotates in the opposite direction until it abuts against the positioning plate (47), thereby pushing the positioning plate (47) to rotate upward with the hinge point as the axis, so that the positioning plate (47) is released from the limit of the damping rod (42).

4. The lifting and transporting mechanism as described in claim 3, characterized in that, A positioning groove (49) is provided on the side wall of the sliding groove (44); A positioning block (50) is provided on the side wall of the positioning plate (47) near the positioning groove (49), and the positioning block (50) is adapted to be inserted into the positioning groove (49).

5. The lifting and transporting mechanism as described in claim 3, characterized in that, The limiting block (46) has an inclined surface (51) near the positioning rod (3) at its outer end, and the positioning rod (3) is adapted to abut against the inclined surface (51).

6. The lifting and transporting mechanism as described in claim 1, characterized in that, The two positioning rods (3) are respectively set on the same side of the outer wall of the two rotating shafts (2), and the two rotating shafts (2) rotate in opposite directions.

7. The lifting and transporting mechanism as described in claim 1, characterized in that, A drive motor (10) is provided on one side of the transmission box (1). The drive motor (10) is connected to the two take-up rollers (11) and is adapted to drive the two take-up rollers (11) to rotate synchronously in the forward and reverse directions.

8. A lifting and transporting mechanism, characterized in that, include: The fixing frame (7) is fixed at both ends to the ends of two steel wire ropes (6); The two lifting claws are respectively hinged to the bottom walls at both ends of the fixed frame (7); The transmission box (1) is mounted on the hoisting bracket, and the two take-up rollers (11) are rotatably mounted inside the transmission box (1); One end of the wire rope (6) is wound around the outer wall of the take-up roller (11), and the other end extends to be fixed on the fixed frame (7); The drive motor (10) is located on the side wall of the transmission box (1) and is connected to the winding roller (11) in a transmission connection. The positioning rod (3) is radially arranged on the outer wall of the rotating shaft (2) of the take-up roller (11) and located on the bottom wall of the transmission box (1); The limiting mechanism (4) is slidably disposed between the two positioning rods (3); When the take-up roller (11) rotates in the forward direction, the clothes drying rod (8) moves downward. When the shaft (2) rotates to the last revolution, the damping rod (42) of the limiting mechanism (4) extends outward and abuts against the positioning rod (3) to reduce the inertia of the take-up roller (11) when the motor stops.

9. The lifting and transporting mechanism as described in claim 8, characterized in that, The limiting mechanism (4) includes: a limiting cylinder (41), which is disposed on the bottom wall of the transmission box (1); The damping rod (42) is vertically fixed to the piston rod end of the limiting cylinder (41), and a sliding groove (44) is opened at each end. The damping limiting member (43) is slidably disposed in the sliding groove (44) and is adapted to limit the positioning rod (3). The return spring (45) has its two ends respectively set on the side wall of the damping limit member (43) and the sliding groove (44); During unwinding, when the rotating shaft (2) rotates to the last revolution, the limiting cylinder (41) drives the damping rod (42) to move in the direction of the rotating shaft (2); The positioning rod (3) rotates forward until it abuts against the damping limit member (43), pushing the damping limit member (43) to retract into the sliding groove (44) and lock itself; During winding, the positioning rod (3) rotates in the opposite direction until it comes into contact with the damping limit member (43), so that the damping limit member (43) disengages from self-locking and slides outward.

10. The lifting and transporting mechanism as described in claim 9, characterized in that, The damping limiting member (43) includes: a limiting block (46), which is slidably disposed in the sliding groove (44), and a reset spring (45) is fixed to its inner end wall; The positioning plate (47) is hinged to the side wall of the limiting block (46) and has a gap between it and the limiting block (46); A compression spring (48) is disposed between the limiting block (46) and the positioning plate (47); Among them, the positioning rod (3) rotates in the forward direction to abut against the limiting block (46) to push the limiting block (46) into the sliding groove (44) to retract, so that the positioning plate (47) is limited by the damping rod (42); The positioning rod (3) rotates in the opposite direction until it abuts against the positioning plate (47), thereby pushing the positioning plate (47) to rotate upward with the hinge point as the axis, so that the positioning plate (47) is released from the limit of the damping rod (42).

11. The lifting and transporting mechanism as described in claim 10, characterized in that, A positioning groove (49) is provided on the side wall of the sliding groove (44); A positioning block (50) is provided on the side wall of the positioning plate (47) near the positioning groove (49), and the positioning block (50) is adapted to be inserted into the positioning groove (49).

12. A method for implementing the operation of a lifting and transporting mechanism, characterized in that, The operation method, employing the lifting and transport mechanism as described in any one of claims 1-8, includes: When unwinding, when the shaft (2) rotates to the last revolution, the limit cylinder (41) drives the damping rod (42) to move in the direction of the shaft (2); The positioning rod (3) rotates forward until it abuts against the damping limit member (43), pushing the damping limit member (43) to retract into the sliding groove (44) and lock itself; During winding, the positioning rod (3) rotates in the opposite direction until it comes into contact with the damping limit member (43), so that the damping limit member (43) disengages from self-locking and slides outward.

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