CN218320467U

CN218320467U - Winding displacement mechanism and electric hoist

Info

Publication number: CN218320467U
Application number: CN202221885706.7U
Authority: CN
Inventors: 陈强; 刘强; 南光举
Original assignee: Ddon Automation Co ltd
Current assignee: Ddon Automation Co ltd
Priority date: 2022-07-20
Filing date: 2022-07-20
Publication date: 2023-01-17
Anticipated expiration: 2032-07-20

Abstract

The utility model discloses a wire arranging mechanism and an electric hoist, belonging to the technical field of hoisting equipment and comprising a support, a winding drum, a rope, a compression structure and a guide structure; both ends of the winding drum are rotatably supported on the support, and the outer circular surface of the winding drum is provided with a spiral groove; the rope is wound in the spiral groove, and at least one end of the rope extends downwards; the guide structure is used for guiding the rope extending downwards; the pressing structure is used for pressing the rope and enabling the rope to be tightly attached to the spiral groove; the compaction structure comprises a plurality of circular shafts distributed along the circumferential direction of the winding drum; the round shaft positioned at the forefront of the rotation direction of the winding drum is in transmission connection with the winding drum, the transmission ratio is greater than 1, the round shafts are all parallel to the winding drum, and each round shaft is rotatably connected with a pinch roller through a one-way bearing; when the rope is released, the one-way bearing is in a self-locking state; when the rope is retracted, the one-way bearing is in a free rotation state.

Description

Winding displacement mechanism and electric hoist

Technical Field

The utility model belongs to the technical field of hoisting equipment, concretely relates to winding displacement mechanism and electric block.

Background

The main purpose of winding displacement mechanism is to guarantee that wire rope on the reel can arrange in the same direction as the grooving of reel and do not produce indiscriminate rope phenomenon, and winding displacement device among the prior art directly compresses tightly the rope through the roller, because the rope is out of shape at will, when the sky colludes the decline, does not have the heavy object to descend on the lifting hook promptly, and the roller compresses tightly the rope and easily leads to the rope to arch, jump the groove even.

SUMMERY OF THE UTILITY MODEL

In order to solve at least one of the above-mentioned problems existing in the prior art, the present invention aims to provide a wire arranging mechanism and an electric hoist.

The utility model discloses the technical scheme who adopts does: the wire arranging mechanism comprises a support, a winding drum, a rope, a pressing structure and a guiding structure; both ends of the winding drum are rotatably supported on the support, and the outer circular surface of the winding drum is provided with a spiral groove; the rope is wound in the spiral groove, and at least one end of the rope extends downwards; the guide structure is used for guiding the rope extending downwards; the pressing structure is used for pressing the rope and enabling the rope to cling to the spiral groove;

the compaction structure comprises a plurality of circular shafts distributed along the circumferential direction of the winding drum; the round shaft positioned at the forefront of the rotation direction of the winding drum is in transmission connection with the winding drum, the transmission ratio is greater than 1, the round shafts are all parallel to the winding drum, and each round shaft is rotatably connected with a pinch roller through a one-way bearing; when the rope is released, the one-way bearing is in a self-locking state; when the rope is retracted, the one-way bearing is in a free rotation state.

As a further alternative, the guide structure comprises a screw, a guide rod and a guide block in threaded connection with the screw; the screw is parallel to the winding drum and is in transmission connection with the winding drum, and the relationship among the lead a of the screw, the transmission ratio n between the winding drum and the screw and the lead b of the spiral groove is as follows: a = nb; the guide rod is parallel to the winding drum and penetrates through the guide rod, and the guide rod is fixed with the support; the guide rod is provided with a vertical through hole for the rope to pass through.

As a further alternative, a first gear is sleeved in the middle of the winding drum; a second gear is fixed in the middle of the round shaft in transmission connection with the winding drum; the second gear is meshed with the first gear; and a third gear meshed with the first gear is fixed on the screw rod.

As a further alternative, the spiral grooves are formed in both ends of the winding drum; the spiral directions of the spiral grooves at the two ends are opposite; the screw rod comprises a first screw rod and a second screw rod, and the rotating direction of the first screw rod and the rotating direction of the second screw rod respectively correspond to the rotating directions of the two spiral grooves.

As a further alternative, the guide structure further comprises a U-shaped frame fixed on the support, and both side walls of the U-shaped frame are rotatably connected with the screw rod through bearings; the third gear is located between two side walls of the U-shaped frame.

As a further alternative, both sides of at least one of the guide blocks are provided with a stroke limit sensor; the stroke limit sensor is fixed on the support; the stroke sensors are arranged at two limit positions corresponding to the moving distance of the guide block.

As a further alternative, rocker arms are fixed to both ends of each circular shaft; one end of the rocker arm is rotatably connected with the round shaft, the other end of the rocker arm is rotatably connected with the support, and the pressing structure further comprises a spring for driving the pressing wheel to press the rope.

As a further alternative, the circular shaft is provided with two; a fixed shaft is arranged between the two circular shafts, and two ends of the fixed shaft are fixed on the support; one ends of the rocker arms, which are far away from the round shaft, are rotatably sleeved on the fixed shaft; the spring is a torsion spring, and two arms of the torsion spring respectively support to two rocker arms located at the same ends of the two circular shafts.

An electric hoist comprising the wire arranging mechanism of any one of the preceding claims.

The utility model has the advantages that: when the rope descends, the one-way bearing is self-locked, the round shaft in transmission connection with the winding drum transmits power to the pressing wheel, the rotating speed of the pressing wheel is higher than that of the winding drum due to the fact that the transmission ratio is larger than 1, and the pressing wheel generates differential speed and dynamic friction force relative to the rope, so that the rope is tensioned, and the rope is fed in an auxiliary mode; when the rope rises, the one-way bearing slips, namely the one-way bearing rotates freely, so that the power of the round shaft cannot be transmitted to the pressing wheel, the pressure rotates along with the winding drum, the pressing wheel has no differential speed relative to the rope, and the rope is prevented from loosening.

Drawings

Fig. 1 is a schematic structural diagram of a wire arranging mechanism according to an embodiment of the present invention.

Fig. 2 is an enlarged schematic view of the area of the traverse a shown in fig. 1.

Fig. 3 is an enlarged schematic view of the area B of the traverse mechanism shown in fig. 1.

Fig. 4 is an enlarged schematic view of the area of the traverse C shown in fig. 1.

In the figure: 1-a support; 2-winding drum; 3-a rope; 4-round shaft; 5-one-way bearing; 6-pressing wheel; 7-a screw; 8-a guide rod; 9-a guide block; 10-a first gear; 11-a second gear; 12-a third gear; 13-a first screw; 14-a second screw; 15-U-shaped frame; 16-a travel limit sensor; 17-a rocker arm; 18-a stationary shaft; 19-torsion spring; 20-a metal wheel; 21-rubber wheel.

Detailed Description

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be briefly described below with reference to the accompanying drawings and the description of the embodiments or the prior art, and it is obvious that the following description of the structure of the accompanying drawings is only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without any inventive work.

The technical solution provided by the present invention will be described in detail by way of embodiments with reference to the accompanying drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In some instances, some embodiments are not described or shown in detail because they are conventional or customary practice.

Furthermore, the technical features described herein, or the steps of all methods or processes disclosed, may be combined in any suitable manner in one or more embodiments, in addition to the mutually exclusive features and/or steps. It will be readily appreciated by those of skill in the art that the order of the steps or operations of the methods associated with the embodiments provided herein may be varied. Any order in the drawings and examples is for illustrative purposes only and does not imply that a certain order is required unless explicitly stated to be required.

The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The terms "connected" and "coupled" when used in this application, encompass both direct and indirect connections (and couplings) where appropriate and where not necessary contradictory.

Fig. 1 to 4 show a wire arranging mechanism provided by an embodiment of the present invention, which includes a support 1, a winding drum 2, a rope 3, a pressing structure and a guiding structure; both ends of the winding drum 2 are rotatably supported on the support 1, and the outer circular surface of the winding drum 2 is provided with a spiral groove; the rope 3 is wound in the spiral groove, and at least one end of the rope 3 extends downwards; the guide structure is used for guiding the rope 3 extending downwards; the pressing structure is used for pressing the rope 3 and enabling the rope 3 to cling to the spiral groove; the compacting structure comprises a plurality of circular shafts 4 distributed along the circumference of the winding drum 2; the round shaft 4 positioned at the forefront of the rotation direction of the winding drum 2 is in transmission connection with the winding drum 2, the transmission ratio is greater than 1, the round shafts 4 are all parallel to the winding drum 2, and each round shaft 4 is rotatably connected with a pinch roller 6 through a one-way bearing 5; when the rope is released, the one-way bearing 5 is in a self-locking state; when the rope is retracted, the one-way bearing 5 is in a free rotation state.

The foremost round shaft 4 in the direction of rotation of the drum 2 is the round shaft 4 that extends downwards, in the circumferential direction of the drum 2, closest to the rope 3 leaving the helical groove.

The round shaft 4 can be directly fixed on the support 1, specifically, the support 1 comprises two opposite end plates, one sides of the two end plates are connected together through a side plate, and the other sides of the two end plates are connected through a connecting strip; the two ends of the rotating shaft can be respectively fixed with the two end plates, and the interference between the pinch roller 6 and the rope 3 is ensured. The circular shaft 4 can be in transmission connection with the winding drum 2 through the existing gear transmission or belt transmission and the like. A transmission ratio greater than 1 means that the rotation speed of the circular shaft 4 is faster than the rotation speed of the winding drum 2. The one-way bearing 5 is commercially available, and the specific structure and operation principle thereof are common knowledge in the art and will not be described herein. The inner ring of the one-way bearing 5 is sleeved outside the round shaft 4 and is in interference fit with the round shaft 4; the pinch roller 6 is sleeved on the outer ring of the one-way bearing 5 and is in interference fit or transition fit with the outer ring of the one-way bearing 5. In order to reduce the abrasion of the rope 3, the outer ring of the pressure wheel 6 is made of rubber, specifically, the pressure wheel 6 comprises a metal wheel 20 sleeved on the outer ring of the one-way bearing 5 and a rubber wheel 21 sleeved outside the metal wheel 20, and the rubber wheel 21 can be in interference fit with the metal wheel 20, or the rubber wheel 21 is fixed with the metal wheel 20 in a sintering manner.

In one embodiment, a rocker arm 17 is fixed to both ends of each circular shaft 4; one end of the rocker arm 17 is rotatably connected with the round shaft 4, and the other end of the rocker arm 17 is rotatably connected with the support 1, so that the round shaft 4 can rotate relative to the support 1; the pressing structure further comprises a spring for driving the pressing wheel 6 to press the rope 3. The spring may be provided between the circular shaft 4 and the support 1, or the spring may be provided between the rocker arm 17 and the support 1. The spring is a compression spring, an extension spring or a torsion spring.

In one embodiment, two circular shafts 4 are provided; a fixed shaft 18 is arranged between the two circular shafts 4, and two ends of the fixed shaft 18 are fixed on the support 1; one end of the rocker arm 17 far away from the round shaft 4 is rotatably sleeved on the fixed shaft 18; the spring is a torsion spring 19, and two arms of the torsion spring 19 respectively abut against the two rocker arms 17 at the same ends of the two circular shafts 4.

In one embodiment, the drum 2 is provided with spiral grooves at both ends; the spiral directions of the spiral grooves at the two ends are opposite; the screw 7 comprises a first screw 13 and a second screw 14, and the rotation direction of the first screw 13 and the rotation direction of the second screw 14 correspond to the rotation directions of the two spiral grooves respectively, so that the stress of the winding drum 2 is more balanced when the heavy object is hoisted. The rotation direction of the first screw 13 and the rotation direction of the second screw 14 correspond to the rotation directions of the two spiral grooves respectively, that is, when the rotation directions of the screw 7 and the winding drum 2 are the same, the spiral grooves on the same side are the same as the rotation directions of the screw 7; when the rotation direction of the screw 7 is opposite to that of the winding drum 2, the spiral grooves on the same side are opposite to the rotation direction of the screw 7; ensuring that the movement of the rope 3 in the axial direction of the drum 2 is constant and co-directional with the corresponding guide blocks 9.

The existing transmission modes such as gear transmission, chain transmission and the like can be adopted between the cylinder and the winding drum 2 and between the screw 7 and the winding drum 2. In one embodiment, a first gear 10 is sleeved in the middle of the winding drum 2; a second gear 11 is fixed in the middle of the round shaft 4 which is in transmission connection with the winding drum 2; the second gear 11 is meshed with the first gear 10; a third gear 12 that meshes with the first gear 10 is fixed to the screw 7. The third gear 12 is located between the first screw 13 and the second screw 14.

The guide structure can be among the prior art, and for example, the guide structure can be for following the slider that 2 endwise slip of reel located the base, offers vertical through-hole on the slider, and rope 3 penetrates the through-hole, and when unreeling or receiving the rope, rope 3 moves along the helicla flute, drives the slider and removes.

In one embodiment, the guide structure may include a screw 7, a guide rod 8, and a guide block 9 threadedly coupled to the screw 7; the screw 7 is parallel to the winding drum 2 and is in transmission connection with the winding drum 2, and the relationship among the lead a of the screw 7, the transmission ratio n between the winding drum 2 and the screw 7 and the lead b of the spiral groove is as follows: a = nb; the guide rod 8 is parallel to the winding drum 2 and penetrates through the guide rod 8, and the guide rod 8 is fixed with the support 1; the guide bar 8 is provided with a vertical through hole for the rope 3 to pass through. The reel 2 rotates to drive the screw 7 to rotate, and then the drive guide block 9 moves along the axial direction of the reel 2, and the guide block 9 and the rope 3 move synchronously in the axial direction of the reel 2, so that the rope 3 is prevented from jumping out of the groove. The transmission ratio n is the ratio of the rotational speed of the drum 2 to the rotational speed of the screw 7.

Two ends of the screw 7 can be respectively and rotatably connected with the two end plates through bearings, and two ends of the guide rod 8 can be respectively and fixedly connected with the two end plates.

In one embodiment, the guiding structure further comprises a U-shaped frame 15 fixed on the support 1, and two side walls of the U-shaped frame 15 are rotatably connected with the screw 7 through bearings; the screws 7 positioned at two sides of the U-shaped frame 15 are the first screw 13 and the second screw 14 respectively; the third gear 12 is located between two side walls of the U-shaped frame 15.

In one embodiment, both sides of at least one guide block 9 are provided with a travel limit sensor 16; the travel limit sensor 16 is fixed to the support 1; the stroke sensors are arranged at two extreme positions corresponding to the moving distance of the guide block 9. The extreme position of the guide block 9 movement is fed back by the stroke sensor, which facilitates the controller to know whether the rope 3 has moved to the maximum position.

The utility model also provides an electric block, including aforementioned arbitrary winding displacement mechanism.

The present invention is not limited to the above-mentioned optional embodiments, and any other products in various forms can be obtained by anyone under the teaching of the present invention, and any changes in the shape or structure thereof, all the technical solutions falling within the scope of the present invention, are within the protection scope of the present invention.

Claims

1. The wire arranging mechanism is characterized by comprising a support, a winding drum, a rope, a pressing structure and a guiding structure; both ends of the winding drum are rotatably supported on the support, and the outer circular surface of the winding drum is provided with a spiral groove; the rope is wound in the spiral groove, and at least one end of the rope extends downwards; the guide structure is used for guiding the rope extending downwards; the pressing structure is used for pressing the rope and enabling the rope to be tightly attached to the spiral groove;

2. The traverse mechanism of claim 1, wherein the guide structure comprises a threaded rod, a guide rod, and a guide block threadedly coupled to the threaded rod; the screw is parallel to the winding drum and is in transmission connection with the winding drum, and the relationship among the lead a of the screw, the transmission ratio n between the winding drum and the screw and the lead b of the spiral groove is as follows: a = nb; the guide rod is parallel to the winding drum and penetrates through the guide rod, and the guide rod is fixed with the support; the guide rod is provided with a vertical through hole for the rope to pass through.

3. The traverse mechanism of claim 2, wherein a first gear is sleeved on the middle of the winding drum; a second gear is fixed in the middle of the round shaft in transmission connection with the winding drum; the second gear is meshed with the first gear; and a third gear meshed with the first gear is fixed on the screw rod.

4. The traverse mechanism of claim 3, wherein the spiral grooves are formed at both ends of the winding drum; the spiral directions of the spiral grooves at the two ends are opposite; the screw rod comprises a first screw rod and a second screw rod, and the rotating direction of the first screw rod and the rotating direction of the second screw rod respectively correspond to the rotating directions of the two spiral grooves.

5. The traverse mechanism of claim 4, wherein the guide structure further comprises a U-shaped frame fixed to the support, and both side walls of the U-shaped frame are rotatably connected to the screw rod through bearings; the third gear is located between two side walls of the U-shaped frame.

6. The traverse mechanism of claim 2, wherein at least one of the guide blocks is provided with a stroke limit sensor on both sides; the stroke limit sensor is fixed on the support; the stroke limit sensors are arranged at two limit positions corresponding to the moving distance of the guide block.

7. The traverse mechanism of claim 1, wherein a rocker arm is fixed to each end of the circular shaft; one end of the rocker arm is rotationally connected with the circular shaft, the other end of the rocker arm is rotationally connected with the support, and the pressing structure further comprises a spring for driving the pressing wheel to press the rope.

8. The traverse mechanism of claim 7, wherein there are two of the circular shafts; a fixed shaft is arranged between the two circular shafts, and two ends of the fixed shaft are fixed on the support; one ends of the rocker arms, which are far away from the round shaft, are rotatably sleeved on the fixed shaft; the spring is a torsion spring, and two arms of the torsion spring respectively support to two rocker arms positioned at the same end of the two circular shafts.

9. An electric hoist, characterized by comprising the traverse mechanism of any one of claims 1 to 8.