CN113772571A

CN113772571A - Steel wire rope traction device

Info

Publication number: CN113772571A
Application number: CN202111073915.1A
Authority: CN
Inventors: 潘恋; 崔志东; 金勇�
Original assignee: Nanjing North Road Intelligent Control Technology Co Ltd
Current assignee: Nanjing North Road Intelligent Control Technology Co Ltd
Priority date: 2021-09-14
Filing date: 2021-09-14
Publication date: 2021-12-10
Anticipated expiration: 2041-09-14
Also published as: CN113772571B

Abstract

The invention relates to the technical field of traction devices, and provides a steel wire rope traction device. Comprises a traction module, a driving module and a counterweight module. The traction module comprises: at least two groups of traction components and steel wire ropes. Each group of traction components comprises a traction piece, a control piece matched with the traction piece and a brake piece matched with the control piece; the traction piece comprises a roll shaft and a ratchet wheel sleeved on the roll shaft; the steel wire rope is wound on each group of traction components in a reciprocating mode, and the free end and the driving end of the steel wire rope are located on different groups of traction components. The control piece is fixed with the roll shaft and is meshed and matched with the ratchet wheel under the action of the brake piece; the meshing state switching of the control piece and the ratchet wheel is carried out through the driving module, so that the switching of the relative rotation state of the ratchet wheel and the roll shaft is controlled, and the switching of the free end and the driving end of the steel wire rope is controlled. The invention realizes the free switching of the free end and the driving end of the steel wire rope.

Description

Steel wire rope traction device

Technical Field

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

Background

The steel wire rope traction device has hoisting, traction and tensioning functions, so that the steel wire rope traction device has important application in the aspects of machining, heavy device transportation, outdoor construction and the like.

At present, common steel wire rope traction devices are divided into three types according to the revolving mode of steel wire ropes, and the three types are respectively as follows: the device comprises a single-drum type steel wire rope traction device, a single-drum core grinding type steel wire rope traction device and a double-drum type steel wire rope traction device. The single winding drum type winding drum comprises a driving roll shaft and a winding drum sleeved on the roll shaft, and the steel wire rope is fixed on the winding drum. The single-reel core grinding type is an improved structure of a single reel, the diameter of each of two ends of the reel is larger than the diameter of the center of the reel, and the steel wire rope is wound on the reel in a reciprocating manner; compared with a single winding drum type, the single winding drum core grinding type traction device is beneficial to increasing the friction force of the steel wire rope relative to the steel wire rope and increasing the tensioning effect. The double-winding drum type single-winding drum core grinding type improved structure comprises two groups of mutually matched roll shafts and winding drums, a plurality of grooves are formed in the winding drums, and the steel wire rope is wound in the grooves of the two winding drums in a reciprocating mode. Compared with a single-reel core grinding type, the double-reel traction device is beneficial to increasing the load capacity of the steel wire rope.

However, the above-mentioned wire rope traction device still has a significant drawback: when the free end and the driving end of the steel wire rope need to be switched, the rotating direction of the roll shaft can be switched accordingly. At this time, the wire rope is liable to be separated from the drum, thereby causing a safety accident.

Disclosure of Invention

In order to solve the problem that in the prior art, when the free end and the driving end of the steel wire rope are switched, the steel wire rope is easy to separate from the winding drum, so that safety accidents are caused. The invention provides a steel wire rope traction device, which realizes free switching of a free end and a driving end of a steel wire rope and prevents the steel wire rope from being separated from a winding drum during switching.

In order to achieve the above purpose, the invention provides the following technical scheme:

a steel wire rope traction device comprises a traction module, a counterweight module and a driving module, wherein the counterweight module and the driving module are matched with the traction module;

the traction module includes:

each group of traction assemblies comprises a traction piece, a control piece matched with the traction piece and a brake piece matched with the control piece; the traction piece comprises a roll shaft and a ratchet wheel sleeved on the roll shaft;

the steel wire ropes are sequentially wound on the traction assemblies in a reciprocating manner, and the two ends of each steel wire rope are respectively a free end and a driving end which are connected with the two ends of equipment to be dragged; the free end and the driving end are respectively positioned on different groups of traction assemblies;

the counterweight module is connected with the steel wire rope and is positioned between the free end and the driving end of the steel wire rope;

the driving module is matched with the roll shaft and used for driving the roll shaft to rotate and controlling the rotating direction of the roll shaft;

the control piece comprises a first control part and a second control part which are matched with each other, the first control part comprises a fixed part fixed with the roller shaft and a movable part movably connected with the fixed part and meshed with the ratchet wheel, and the second control part is abutted and matched with the movable part under the abutting pressure of the brake piece; the control piece corresponding to the driving end and the control piece corresponding to the free end are opposite in mirror image, the abutting state of the second control part and the movable part is controlled through the switching of the rotation direction of the roll shaft, and the switching of the free end and the driving end of the steel wire rope is controlled.

In the working process of the steel wire rope traction device, in the traction assembly where the steel wire rope driving end is located, the second control part is abutted against the movable part, so that the movable part and the ratchet wheel are in a meshing state. The movable part is connected with the fixed part, and the fixed part is fixed with the roll shaft, so that the ratchet wheel and the roll shaft do not rotate relatively. The roll shaft and the ratchet wheel synchronously rotate along the traction direction required by the equipment to be pulled under the driving of the driving module, so that the traction effect on the traction equipment is realized.

At the moment, in the traction assembly where the free end of the steel wire rope is located, the second control part of the control part is not abutted to the movable part, so that the movable part and the ratchet wheel are in a non-meshing state, and the ratchet wheel and the roller shaft can rotate relatively.

Meanwhile, the counterweight module is arranged between the free end and the driving end of the steel wire rope, so that the counterweight module can provide tension force to the driving end in the same direction as the traction force; and providing a tension opposite to the traction force for the free end, and enabling the rotation direction of the ratchet wheel corresponding to the free end to be always opposite to the rotation direction of the ratchet wheel corresponding to the driving end.

When the driving end and the free end of the steel wire rope are switched, the driving module is used for controlling to change the rotating direction of the roll shaft in each traction assembly. For the original free end, when the rotation direction of the roller shaft is switched instantly, the corresponding fixed part and the roller shaft synchronously rotate and drive the movable part to rotate in the same direction; and under the pressing action of the brake piece, the second control part keeps the original motion state, so that the rotating movable part is jacked up by the second control part, is abutted and matched with the movable part and the second control part, controls the movable part to be meshed with the ratchet wheel, and finally enables the ratchet wheel and the roller shaft to synchronously rotate, so that the original free end is switched into a driving end.

Similarly, for the original driving end, when the rotation direction of the roller shaft is switched instantly, the corresponding fixed part, the movable part and the roller shaft rotate synchronously, the second control part keeps the original motion state, and the control part structure corresponding to the driving end is opposite to the control part structure corresponding to the free end in a mirror image mode, so that the movable part is pressed down by the second control part, and the original driving end is switched into the free end.

And under the effect of the counterweight module, the steel wire rope at the new driving end can be tensioned in time, so that the condition that the steel wire rope is separated from the traction piece is prevented.

Furthermore, in the first control part, the fixed part is a shifting sheet seat fixedly sleeved on the roller shaft, the movable part is a shifting sheet with one end movably connected with the shifting sheet seat and the other end engaged with the ratchet wheel.

Further, the second control part is a plectrum control ring sleeved on the plectrum seat, and a baffle is arranged on the plectrum control ring; the brake piece is abutted against the outer side of the plectrum control ring, and the plectrum control ring is abutted and matched with the plectrum through the baffle.

The structure of the control piece of plectrum class is comparatively simple, consequently easily carries out draw gear's periodic inspection maintenance also easily maintains when the control piece damages and changes, is favorable to increasing draw gear's life. And the control piece of the plectrum class can form stable meshing cooperation with between the ratchet to prevent in the traction process, the plectrum with the reduction of tension that causes of the meshing state change between the ratchet, thereby influence normal traction.

Furthermore, the mutually matched shifting sheets and the baffles are a plurality of pairs, and the included angles between every two adjacent pairs of shifting sheets and baffles are equal.

The arrangement that included angles between two adjacent pairs of shifting pieces and the baffle are equal is beneficial to increasing the stability of a meshing state in the meshing matching process, so that the traction effect of the traction device is ensured.

Further, the brake piece comprises a friction pin which is in abutting press fit with the second control part.

Furthermore, the brake piece further comprises an elastic piece and a bolt, wherein one end of the elastic piece is connected with the spare end of the friction pin, and the other end of the elastic piece is connected with the bolt.

In the brake piece, the friction pin is always pressed against the second control part of the control piece, and at the moment of switching between the free end and the driving end, because the free end is acted by friction force and the driving end is acted by inertia, the second control parts corresponding to the free end and the driving end still keep the original motion state, and further the meshing state between the movable parts corresponding to the free end and the driving end and the ratchet wheel is changed.

Because the two ends of the elastic part are respectively connected with the bolt and the friction pin, the deformation amount of the elastic part can be controlled through the bolt, so that the abutting pressure of the friction pin on the second control part is controlled, and the reliability of state switching between the free end and the driving end of the traction device is improved.

Furthermore, the traction piece of each group of traction assemblies further comprises a winding drum sleeved and fixed on the ratchet wheel, a plurality of grooves are formed in the winding drum, and the steel wire rope is wound in the grooves of the winding drum in a reciprocating mode.

The steel wire rope is arranged in the groove of the winding drum, so that the friction force between the steel wire rope and the traction assembly can be increased, and the groove has a limiting effect on the steel wire rope, so that the steel wire rope can be prevented from sliding off the winding drum while the traction force of the steel wire rope traction device is increased.

Furthermore, each group of traction assemblies further comprises an auxiliary traction piece, and the steel wire rope is sequentially wound between the traction piece and the auxiliary traction piece of each group of traction assemblies in a reciprocating manner.

The mode that the traction part and the auxiliary traction part simultaneously wind the steel wire rope is beneficial to increasing the winding number of the steel wire rope, thereby increasing the traction force threshold value provided by the traction device.

Furthermore, the auxiliary traction part comprises an auxiliary roll shaft, an auxiliary winding drum is sleeved on the auxiliary roll shaft, a plurality of grooves are formed in the auxiliary winding drum, and the steel wire rope is arranged in the grooves of the auxiliary winding drum.

Furthermore, each traction piece of each group of traction assemblies shares one roll shaft, and each auxiliary traction piece shares one auxiliary roll shaft; the driving module is matched with the roll shaft.

Each of the group traction assemblies respectively draw a roll shaft of a sharing, consequently only need a set of drive module with the roll shaft cooperate can, be favorable to simplifying wire rope draw gear's structure reduces wire rope draw gear's volume makes it be convenient for install in narrow and small space.

Has the advantages that:

(1) the invention provides a novel steel wire rope traction device which comprises at least two groups of traction assemblies, wherein the free end and the driving end of a steel wire rope are respectively arranged on different traction assemblies. The ratchet wheel at the driving end and the roll shaft synchronously rotate through the transmission matching of the brake piece, the control piece and the ratchet wheel in the traction assembly, and the ratchet wheel at the free end is always in a free rotation state; and the control part structures corresponding to the free end and the driving end are mirror images of each other, so that when the free end and the driving end of the steel wire rope need to be switched, only the driving module needs to be controlled to change the rotating direction of each roll shaft to be opposite to the original traction direction. The traction device simply and effectively realizes the free switching of the free end and the driving end of the steel wire rope.

(2) According to the invention, the counterweight module is arranged between the driving end and the free end, so that under the action of the counterweight module, the steel wire rope at the new driving end can be tensioned at the moment of switching between the driving end and the free end, and the condition that the steel wire rope is separated from the traction piece during free switching is effectively prevented.

(3) The control piece of the steel wire rope traction device is of a plectrum structure, the structure and the control method of the plectrum control piece are simple, stable meshing is easy to form between the plectrum control piece and the ratchet of the ratchet wheel, the tension force reduction caused by the meshing state change between the plectrum and the ratchet wheel in the traction process is prevented, and the effectiveness of the traction function of the traction device is ensured.

(4) The brake piece of the steel wire rope traction device comprises a friction pin, an elastic piece and a bolt, wherein two ends of the elastic piece are respectively connected with the bolt and the friction pin, so that the deformation quantity of the elastic piece can be controlled through the bolt, the abutting pressure of the friction pin on a second control part is controlled, and the reliability of free switching between the free end of the traction device and the driving end is improved.

(5) Each group of traction components of the steel wire rope traction device further comprises an auxiliary traction component, and the steel wire rope is sequentially wound between the traction component and the auxiliary traction component of each group of traction components in a reciprocating manner, so that the number of winding turns of the steel wire rope is increased, and the traction force threshold of the traction device is increased.

(6) In the steel wire rope traction device, the traction pieces of each group of traction assemblies share one roll shaft, so that only one group of driving modules is matched with the roll shaft, the structure of the steel wire rope traction device is simplified, the size of the steel wire rope traction device is reduced, and the steel wire rope traction device is convenient to install and use in a narrow space.

It should be understood that all combinations of the foregoing concepts and additional concepts described in greater detail below can be considered as part of the inventive subject matter of this disclosure unless such concepts are mutually inconsistent.

The foregoing and other aspects, embodiments and features of the present teachings can be more fully understood from the following description taken in conjunction with the accompanying drawings. Additional aspects of the present invention, such as features and/or advantages of exemplary embodiments, will be apparent from the description which follows, or may be learned by practice of specific embodiments in accordance with the teachings of the present invention.

Drawings

The drawings are not intended to be drawn to scale. In the drawings, each identical or nearly identical component that is illustrated in various figures may be represented by a like numeral. For purposes of clarity, not every component may be labeled in every drawing. Embodiments of various aspects of the present invention will now be described, by way of example, with reference to the accompanying drawings, in which:

FIG. 1 is a schematic view of a wire rope hitch of the present invention;

FIG. 2 is a top view of the tow assembly of FIG. 1;

fig. 3 is a disassembled schematic view of the draft assembly of fig. 1.

The reference numbers in the figures are: 1 is a traction module, 2 is a counterweight module, 3 is a driving module, and 4 is a bracket; 11 is a traction assembly, 12 is a steel wire rope, 13 is a traction piece, 14 is a control piece, 15 is a brake piece, 16 is an auxiliary traction piece, 17 is a mounting seat, 18 is an auxiliary mounting seat, 19 is a check ring, 20 is an auxiliary check ring, 21 is a guide column, 22 is a balancing weight, 23 is a pulley block, 31 is a driving gear, and 32 is a driving motor; 131 is a roller shaft, 132 is a ratchet, 133 is a drum, 141 is a pick, 142 is a pick seat, 143 is a pick control ring, 144 is a baffle, 151 is a friction pin, 152 is an elastic member, 153 is a bolt, 154 is a brake seat, 161 is an auxiliary roller shaft, 162 is an auxiliary bearing, and 163 is an auxiliary drum.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention without any inventive step, are within the scope of protection of the invention. Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs.

The use of "first," "second," and similar terms in the description and claims of the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. Similarly, the singular forms "a," "an," or "the" do not denote a limitation of quantity, but rather denote the presence of at least one, unless the context clearly dictates otherwise. The terms "comprises," "comprising," or the like, mean that the elements or items listed before "comprises" or "comprising" encompass the features, integers, steps, operations, elements, and/or components listed after "comprising" or "comprising," and do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. "upper", "lower", "left", "right", and the like are used only to indicate relative positional relationships, and when the absolute position of the object to be described is changed, the relative positional relationships may also be changed accordingly.

The invention discloses a steel wire rope traction device which comprises at least two groups of traction components, wherein the free end and the driving end of a steel wire rope are respectively arranged on different traction components. The ratchet wheel at the driving end and the roll shaft synchronously rotate through the transmission matching of the brake piece, the control piece and the ratchet wheel in the traction assembly, and the ratchet wheel at the free end is always in a free rotation state; and the control piece structures corresponding to the free end and the driving end are mirror images. Therefore, when the free end and the driving end of the steel wire rope need to be switched, only the driving module needs to be controlled to change the rotating direction of each roll shaft to be opposite to the original traction direction, and therefore free switching of the free end and the driving end is achieved. The counterweight module is arranged between the driving end and the free end, so that the tension direction of the free end of the steel wire rope is always opposite to the traction direction of the driving end; therefore, when the free end and the driving end are switched instantly, the steel wire rope at the new driving end can be tensioned, so that the steel wire rope is effectively prevented from being separated from the traction piece when the free end and the driving end are switched.

As shown in fig. 1, the steel wire rope traction device includes a support 4, a traction module 1 disposed on the support 4, and a driving module 3 and a counterweight module 2 matched with the traction module 1. The traction module 1 comprises at least two groups of traction components 11 and a steel wire rope 12 wound on the traction components 11 in a reciprocating mode. The driving module 3 is used for providing driving force for the traction of the steel wire rope 12; the counterweight module 2 is arranged between the driving end and the free end of the steel wire rope 12 and is used for providing initial traction force for the driving end of the steel wire rope 12 and tension force opposite to the driving action of the free end.

Specifically, the driving module 3 includes a driving motor 32 and a driving gear 31. The driving gear 31 is matched with the traction component 11, and drives the traction component 11 to move under the action of the driving motor 32, so that the steel wire rope 12 is pulled by the equipment to be pulled.

Specifically, the counterweight module 2 includes a guide post 21, a counterweight 22 sleeved on the guide post 21, and a pulley block 23 engaged with the counterweight 22. The steel wire rope 12 is connected with a balancing weight 22 through the pulley block 23, and provides initial tension for the driving end of the steel wire rope 12 through the axial movement of the balancing weight 22 along the guide post 21, and the free end of the steel wire rope has an acting force opposite to the traction action.

As shown in fig. 2 to 3, in the traction module 1, the traction assembly 11 is disposed on a mounting seat 17. Each group of traction assemblies 11 comprises a traction piece 13 fixed on the mounting seat 17, a control piece 14 in meshing fit with the traction piece 13, and a brake piece 15 in abutting press fit with the control piece 14. The traction member 13 includes a roller 131, and a ratchet 132 sleeved on the roller 131. The free end and the driving end of the steel wire rope 12 are respectively arranged on different traction components 11.

Specifically, the control member 14 includes a first control portion and a second control portion, which are matched with each other, the first control portion includes a fixed portion fixed to the roller shaft 131 and a movable portion movably connected to the fixed portion and engaged with the ratchet 132, and the second control portion is engaged with the movable portion under the pressing force of the braking member 15. The control member corresponding to the driving end and the control member corresponding to the free end are opposite in mirror image, the abutting state of the second control part and the movable part is controlled by switching the rotation direction of the roller shaft 131, and the switching of the free end and the driving end of the steel wire rope 12 is controlled by the combined action of the counterweight module 2.

In the working process of the wire rope traction device, in the traction assembly 11 where the driving end of the wire rope 12 is located, the second control part is abutted against the movable part, so that the movable part and the ratchet wheel 132 are in a meshing state. The movable portion is connected to the fixed portion, and the fixed portion is fixed to the roller 131, so that the ratchet 132 and the roller 131 do not rotate relatively. The roller 131 and the ratchet wheel 132 synchronously rotate along the traction direction required by the equipment to be pulled under the driving of the driving module 3, so that the traction effect on the traction equipment is realized.

At this time, in the traction assembly 11 where the free end of the steel wire rope 12 is located, the second control portion of the control member 14 is not abutted to the movable portion, so that the movable portion and the ratchet wheel 132 are in a non-meshing state, and the ratchet wheel 132 and the roller shaft 131 can relatively rotate.

Meanwhile, as the counterweight module 2 is arranged between the free end and the driving end of the steel wire rope 12, the counterweight module provides a tension force to the driving end in the same direction as the traction force; and providing a tension opposite to the traction force for the free end, and enabling the rotation direction of the ratchet wheel corresponding to the free end to be always opposite to the rotation direction of the ratchet wheel corresponding to the driving end.

When the driving end and the free end of the steel wire rope 12 are switched, firstly, the driving module 3 controls the rotation direction of the roller shaft 131 in each traction assembly 11 to be opposite to the rotation direction of the original driving end roller shaft. For the original free end, when the rotation direction of the roller shaft is switched instantly, the corresponding fixed part and the roller shaft synchronously rotate and drive the movable part to rotate in the same direction; under the pressing action of the brake 15, the second control part keeps the original motion state, so that the moving part in rotation is jacked up by the second control part, and is abutted and matched with the moving part and the second control part, the moving part is controlled to be meshed with the ratchet wheel 132, and finally the ratchet wheel 132 and the roller shaft 131 synchronously rotate, so that the original free end is switched into a driving end.

Similarly, for the original driving end, at the moment when the rotation direction of the roller shaft 131 is switched, the corresponding fixed part, the movable part and the roller shaft 131 rotate synchronously, the second control part keeps the original motion state, and the control part structure corresponding to the driving end is opposite to the control part structure corresponding to the free end in a mirror image manner, so that the movable part is pressed down by the second control part, and the original driving end is switched to the free end.

At the moment of switching between the driving end and the free end, the counterweight module 2 can tension the steel wire rope at the new driving end, so that the steel wire rope is effectively prevented from being separated from the traction piece during free switching.

Specifically, in the first control part, the fixed part is a shifting piece seat 142 fixedly sleeved on the roller shaft 131, and the movable part is a shifting piece 141 with one end connected with the shifting piece seat 142 and the other end engaged with the ratchet wheel 132.

Specifically, the second control part is a plectrum control ring 143 sleeved on the plectrum seat 142, and a baffle 144 is arranged on the plectrum control ring 143; the brake piece 15 is abutted against the outer side of the plectrum control ring 143, and the plectrum control ring 143 is abutted and matched with the plectrum 141 through the baffle 144.

The structure of the control piece of the plectrum class is simpler, so that the regular inspection and maintenance of the traction device are easy to carry out, and accidents are prevented from happening in the using process; and also easy to repair and replace when the control member 14 is damaged, which contributes to increasing the service life of the traction device. And it can form stable meshing fit with the ratchet wheel 132 under the control action of the control member 14, so as to prevent the tension from being reduced due to the change of the meshing state between the poking sheet 141 and the ratchet wheel 132 during the traction process, thereby affecting the traction effect of the traction device.

Specifically, the mutually matched shifting pieces 141 and the baffles 144 have a plurality of pairs, and the included angles between two adjacent pairs of shifting pieces 141 and baffles 144 are equal. In this embodiment, the three pairs of the mutually engaging poking pieces 141 and the blocking plates 144 are provided. The arrangement of equal included angles between the two pairs of adjacent shifting pieces 141 and the baffle 144 is beneficial to increasing the stability of the meshing state in the meshing matching process, thereby ensuring the traction effect of the traction device.

Specifically, the mounting seat 17 of the traction piece 13 is a bearing mounting seat which is used for reducing the friction force between the roll shaft 131 and the mounting seat 17 in the relative rotation process, and the service life of the traction device is prolonged.

Specifically, the brake 15 includes a brake base 154, and a friction pin 151, an elastic member 152, and a bolt 153 disposed in the brake base 154. The friction pin 151 is in press fit with the second control portion, one end of the elastic member 152 is connected with the spare end of the friction pin 151, and the other end is connected with the bolt 153. In the brake 15, the friction pin 151 always abuts against the second control portion of the control member 14, and at the moment of switching between the free end and the driving end, because the free end is acted by friction force and the driving end is acted by inertia, the second control portion corresponding to the free end and the driving end still keeps the original motion state, and the engagement state between the movable portion corresponding to the free end and the driving end and the ratchet wheel 132 is changed.

Because the two ends of the elastic element 152 are respectively connected with the bolt 153 and the friction pin 151, the deformation amount of the elastic element 152 can be controlled through the bolt 153, so that the abutting pressure of the friction pin 151 on the second control part is controlled, and the reliability of state switching between the free end and the driving end of the traction device is improved.

Specifically, the traction element 13 further includes a winding drum 133 fixed to the ratchet 132, and the winding drum 133 is provided with a plurality of grooves. The steel wire rope 12 is wound on the winding drum grooves of the traction assemblies 11 in a reciprocating manner, so that the friction force between the steel wire rope 12 and the winding drum 133 can be increased, the grooves have a limiting effect on the steel wire rope 12, and the steel wire rope 12 can be prevented from slipping off the winding drum 133 while the traction force of the steel wire rope traction device is increased.

Specifically, each group of traction assemblies 11 further comprises an auxiliary traction member 16, and the steel wire rope is sequentially wound between the traction member 13 and the auxiliary traction member 16 of each group of traction assemblies 11 in a reciprocating manner. The simultaneous winding of the steel cable by the traction element 13 and the auxiliary traction element 16 is advantageous to increase the number of windings of the steel cable 12, so as to increase the traction threshold that the traction device can provide.

Specifically, the auxiliary traction member 16 includes an auxiliary roller shaft 161, and an auxiliary winding drum 163 sleeved on the auxiliary roller shaft 161, wherein a plurality of grooves are formed on the auxiliary winding drum 163, and the steel wire rope 12 is disposed in the grooves of the auxiliary winding drum.

Specifically, the traction members 13 of each group of traction assemblies 11 share one roller shaft 131, and the auxiliary traction members 16 share one auxiliary roller shaft 161; the driving module 3 is matched with the roller 131. Each group of traction components 11 respectively draw a piece 13 and share a roller 131, consequently only need a set of drive module 3 with the roller 131 cooperate can, be favorable to simplifying wire rope draw gear's structure reduces wire rope draw gear's volume makes it be convenient for install and use in narrow and small space.

Specifically, in the auxiliary traction element 16, the auxiliary roller shaft 161 and the auxiliary winding drum 163 are sleeved by the auxiliary bearing 162, and the auxiliary bearing 162 is beneficial to reducing the friction force between the two in the traction process, so that the service life of the auxiliary traction element 16 is prolonged.

Specifically, the auxiliary roller shaft 161 is sleeved on the auxiliary mounting seat 18. The fixing means are simple and the removal of the auxiliary traction element 16 is easy.

Specifically, in this embodiment, the traction module 1 of the wire rope traction device includes two groups of traction assemblies 11, where each group of traction assemblies 11 includes one traction element 13 and one auxiliary traction element 16. The two groups of traction assemblies 11 are arranged on the bracket 4 in parallel along the axial direction. The two traction pieces 13 share one roller shaft 131, the other parts of the two traction pieces 13 are separated by a retaining ring 19 sleeved on the roller shaft 131, the two auxiliary traction pieces 16 share one auxiliary roller shaft 161, and the other parts of the two auxiliary traction pieces 16 are separated by an auxiliary retaining ring 20 sleeved on the auxiliary roller shaft 161. The two traction pieces 13 share one roller shaft 131, and the two auxiliary traction pieces 16 share one auxiliary roller shaft 161, so that the structure of the traction device is simplified while the free switching of the free end and the driving end of the steel wire rope traction device is ensured, the size of the traction device is reduced, and the traction device is convenient to install and use in a narrow space.

Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the invention. Therefore, the protection scope of the present invention should be determined by the appended claims.

Claims

1. A steel wire rope traction device is characterized by comprising a traction module, a counterweight module and a driving module, wherein the counterweight module and the driving module are matched with the traction module;

the traction module includes:

the control piece comprises a first control part and a second control part which are matched with each other, the first control part comprises a fixed part fixed with the roller shaft and a movable part movably connected with the fixed part and meshed with the ratchet wheel; the second control part is in butt fit with the movable part under the butt pressure of the brake piece; the control piece corresponding to the driving end and the control piece corresponding to the free end are opposite in mirror image, the abutting state of the second control part and the movable part is controlled through the switching of the rotation direction of the roll shaft, and the switching of the free end and the driving end of the steel wire rope is controlled.

2. The steel wire rope traction device as claimed in claim 1, wherein in the first control part, the fixed part is a shifting piece seat fixedly sleeved on the roller shaft, and the movable part is a shifting piece with one end movably connected with the shifting piece seat and the other end engaged with the ratchet wheel.

3. The steel wire rope traction device according to claim 2, wherein the second control part is a plectrum control ring sleeved on the plectrum seat, and a baffle is arranged on the plectrum control ring; the brake piece is abutted against the outer side of the plectrum control ring, and the plectrum control ring is abutted and matched with the plectrum through the baffle.

4. A steel cable pulling apparatus as claimed in claim 3, wherein the cooperating pairs of said fingers and said stops are arranged such that the included angles between adjacent pairs of said fingers and said stops are equal.

5. A cable traction device as claimed in claim 1, wherein the brake member includes a friction pin which is in pressing engagement with the second control portion.

6. The steel wire rope traction device as claimed in claim 5, wherein the brake member further comprises an elastic member and a bolt, one end of the elastic member is connected with the free end of the friction pin, and the other end of the elastic member is connected with the bolt.

7. The steel wire rope traction device as claimed in claim 1, wherein the traction member of each group of traction assemblies further comprises a winding drum sleeved and fixed on the ratchet wheel, the winding drum is provided with a plurality of grooves, and the steel wire rope is wound in the grooves of the winding drum in a reciprocating manner.

8. A steel cable pulling apparatus as claimed in claim 1, wherein each group of pulling assemblies further comprises an auxiliary pulling member, and the steel cable is sequentially wound back and forth between the pulling member and the auxiliary pulling member of each group of pulling assemblies.

9. The steel wire rope traction device as claimed in claim 8, wherein the auxiliary traction member comprises an auxiliary roller shaft, an auxiliary winding drum sleeved on the auxiliary roller shaft, a plurality of grooves are formed on the auxiliary winding drum, and the steel wire rope is placed in the grooves of the auxiliary winding drum.

10. A wireline traction device as claimed in claim 9, wherein the traction members of the traction assemblies share a roller shaft and the secondary traction members share a secondary roller shaft; the driving module is matched with the roll shaft.