CN111952891A

CN111952891A - Traction wheel and threading machine comprising same

Info

Publication number: CN111952891A
Application number: CN202010588000.3A
Authority: CN
Inventors: 张世祥; 孙建东
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-06-24
Filing date: 2020-06-24
Publication date: 2020-11-17

Abstract

The invention discloses a traction wheel and a threading machine comprising the same, belonging to the technical field of building electromechanics, wherein the traction wheel comprises a traction wheel body, at least one convex feature is arranged on the outer edge of the traction wheel body, and a threading wire is driven by the convex feature to do intermittent motion; the threading machine comprises a motor and a rack, wherein a transmission assembly is arranged in the rack and drives the transmission assembly, the rack is provided with the traction wheel, the transmission assembly drives at least one traction wheel, and the traction wheel can abut against a threading wire and drive the threading wire to move. According to the technical scheme of the embodiment of the invention, the intermittent motion is the steady motion of the threading wire, and the disturbance and the impact motion are added, so that the threading wire can more easily pass through a 90-degree straight bent angle and a variable cross section of the connecting pipe, and meanwhile, the traction force required for drawing the threading wire with the same length is greatly reduced, the number of traction systems can be reduced, the threading efficiency is improved, and the cost of the threading machine is reduced.

Description

Traction wheel and threading machine comprising same

Technical Field

The invention relates to the technical field of building machinery, in particular to a traction wheel and a threading machine comprising the traction wheel.

Background

At present, in the construction, the electric wire is not directly laid but wears to establish in pre-buried intraductal for dampproofing the heat dissipation, prevent that the insulating layer is impaired, avoid the short circuit to arouse the conflagration, and be convenient for later maintenance change etc.. Compared with the traditional threading process of the artificial embedded pipe, the threading process of the threading machine has the advantages that the defects of long time consumption, low working efficiency and the like of artificial threading are overcome.

Most of threading machines in the market utilize the motion of a drive assembly on the motor drive frame to utilize drive assembly to drive threading line motion, make the threading line pass the pre-buried pipe, thereby lead the wire through the threading line and pass the pre-buried pipe, this kind of structure is convenient for workman's quick threading, but when the pre-buried pipe had a plurality of 90 straight bent angles and connecting pipe, the threading line blocked very easily. Particularly, when the 90-degree straight bending angle is connected by a connecting pipe, because the inner diameter of the connecting pipe is generally larger than or equal to the outer diameter of the connected pipe, a variable cross section is formed at the position, and the threading wire is particularly easy to be blocked at the variable cross section after being bent by the 90-degree straight bending angle.

The current solution is generally when discovering threading card die back, and the threading is worn again to the lead wire that contracts toward retrieving, finally accomplishes the threading through constantly trying, and for steady and quick threading, threading machine on general market mostly utilizes two sets of drive assembly of two motor drive to drawing threading wire, so not only increased the cost, efficiency is also not high moreover.

In people's inherent thinking, the more steady effect that thinks of threading is the better mostly, the research direction of threading machine also all focuses on improving stationarity and speed mostly, to above-mentioned card line problem, does not arouse people's attention and solution.

Disclosure of Invention

In order to solve the defects in the prior art, the invention aims to provide a traction wheel and a threading machine comprising the traction wheel, wherein the traction wheel and the threading machine can quickly drive a threading wire to pass through an embedded pipe with a plurality of 90-degree straight bent angles and connecting pipes, so that the threading efficiency is improved.

The technical scheme adopted by the invention for solving the technical problem comprises the following steps:

in one aspect, the invention provides a traction wheel, which comprises a traction wheel body, wherein at least one convex feature is arranged on the outer edge of the traction wheel body, and the convex feature drives a lead wire to move intermittently.

On the other hand, the invention also provides a threading machine which comprises a motor and a rack, wherein a transmission assembly is arranged in the rack and drives the transmission assembly, the rack is provided with the traction wheel, the transmission assembly drives at least one traction wheel, and the traction wheel can be abutted against the threading wire and drive the threading wire to move.

Furthermore, the transmission assembly synchronously drives at least one pair of traction wheels, the protruding features on the upper traction wheel and the lower traction wheel abut against the two sides of the lead wire and drive the lead wire to move, the traction wheels are provided with a plurality of protruding features, at least two protruding features are different in height, and the lead wire is driven to move on the pair of traction wheels in staggered positions.

Furthermore, the threading wire is driven by at least two groups of traction wheels, and the convex features on the traction wheels enable one group of traction wheels to drive the threading wire while the other group of traction wheels is unloaded, so that the threading wire is ensured to be driven to move basically and continuously.

Furthermore, the centers of the front traction wheel set and the rear traction wheel set are provided with offset distances.

Further, the traction wheel has three uniformly distributed raised features, each raised feature having a width less than or equal to about 60 °.

Furthermore, the output shaft of the transmission assembly is provided with a spline feature and is matched with a spline structure on the central hole of the traction wheel, so that the traction wheel is driven to move.

Preferably, the traction wheel is a rubber member.

Furthermore, both sides of the traction wheel are also provided with protective walls.

Furthermore, a guide pipe of the traction wire is also arranged on the frame.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the traction wheel disclosed by the invention, the intermittent motion caused by the convex characteristics adds disturbance and impact motion to the stable motion of the threading wire, so that the threading wire can easily pass through a 90-degree straight bent angle and a variable cross section of the connecting pipe, the phenomenon that the threading wire is blocked is effectively avoided, the threading efficiency is improved, and the workload of operators is reduced.

2. The threading machine provided by the invention adopts the traction wheel provided by the invention, so that the traction force required for drawing threading wires with the same length is greatly reduced, a plurality of groups of threading wires driven by traction systems are required, and a group of traction systems is enough at present, thereby not only improving the threading efficiency, but also reducing the cost of the threading machine.

3. According to the threading machine disclosed by the invention, the thread jamming problem is solved by adding disturbance and impact motion in threading, the inherent idea that people pursue stable threading in the traditional method is broken, a better threading effect is realized on the premise of intermittent threading, the threading efficiency is improved, and the prejudice of the industry is overcome.

4. The threading machine has the advantages that the plurality of convex features are arranged on the traction wheel, the intermittent motion of the convex features enables the motion stroke of the threading wire driven at the same rotating speed to be reduced, and the threading speed can be reduced.

5. According to the threading machine disclosed by the invention, the heights of the convex features on the traction wheels are different, and the centers of the front traction wheel and the rear traction wheel are offset, so that the disturbance of threading wires can be aggravated, the wire clamping is further avoided, and the threading is more time-saving and labor-saving.

6. According to the threading machine disclosed by the invention, the width of each convex feature is less than or equal to about 60 degrees, the excessive arrangement of the convex features on the traction wheel is avoided, and the intermittent motion of each convex feature driving the threading wire has enough idle stroke to form impact.

7. According to the threading machine disclosed by the invention, the transmission assembly drives the traction wheel to move through the spline structure, the intermittent motion caused by the convex characteristic adds disturbance and impact motion to the stable motion of the threading wire, the traditional clamping friction transmission can loosen the traction wheel, and the spline transmission can ensure that the transmission assembly can effectively drive the traction wheel.

8. According to the threading machine disclosed by the invention, the traction wheel is a rubber piece, so that larger deformation and friction force can be provided, the structure of the traction wheel is complex and changeable, and the rubber piece is convenient for mass production of dies.

9. According to the threading machine disclosed by the invention, the two sides of the traction wheel are provided with the protective walls, and the guide pipe provided with the traction wire on the machine frame can better assist in threading movement.

Drawings

The present application will be described in further detail below with reference to the drawings and preferred embodiments, but those skilled in the art will appreciate that the drawings are only drawn for the purpose of illustrating the preferred embodiments and therefore should not be taken as limiting the scope of the present application. Furthermore, unless specifically stated otherwise, the drawings are intended to be conceptual in nature or configuration of the described objects and may contain exaggerated displays and are not necessarily drawn to scale.

Figure 1 is a schematic cross-sectional view of a pre-buried pipe.

Fig. 2 is a schematic structural view of a traction wheel part of the threader according to the first embodiment of the invention.

Fig. 3 is a schematic structural view of a traction wheel part of the threader according to a second embodiment of the invention.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention.

The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.

All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.

The first embodiment is as follows:

figure 1 is a schematic cross-sectional view of a pre-buried pipe containing a plurality of 90 ° straight bends and connecting pipes. A plurality of

wiring pipes

11 and 12 are arranged in a pre-buried pipe 1 of a building wall, the

wiring pipes

11 and 12 are provided with a plurality of 90-degree straight bent angles 13, meanwhile, the

wiring pipes

11 and 12 are connected by a connecting pipe 14 at the 90-degree straight bent angle, the inner diameter of the connecting pipe 14 is larger than or equal to the outer diameter of a connected pipe, a variable cross section position 15 is formed, and the lead-through wire is particularly easy to be blocked at the variable cross section position 15 after being bent by a 90-degree straight bent angle.

As shown in fig. 2, first, the present embodiment provides a traction wheel 22, wherein at least one protrusion feature 221 is disposed on an outer edge of the traction wheel 22, and the wire 24 is driven by the protrusion feature 221 to perform an intermittent motion. Specifically, three raised features 221 are provided on the traction wheel 22 of the present embodiment, but the number is not intended to limit the scope of the present invention, and in other embodiments, the number of raised features 221 provided on each traction wheel 22 may be increased or decreased, at least one raised feature may be provided, and when increasing, the width of each raised feature may be less than or equal to about 60 ° to avoid over-arrangement of raised features on the traction wheel, and to ensure that each raised feature drives an intermittent motion of the lead through with sufficient idle stroke to form the impact.

Secondly, this embodiment still provides a threading machine 2, threading machine 2 includes motor (not shown) and frame 21, is provided with a set of drive assembly (only output shaft 211 is shown) in the frame 21, and the motor drives the drive assembly, and each set of drive assembly drives a pair of traction wheel 22 of this embodiment in step, and motor, drive assembly and traction wheel 22 constitute a set of traction system.

The traction wheel 22 has at least one protrusion feature 221, and the protrusion feature 221 can tightly abut against two sides of the lead wire 24 and drive the lead wire 24 to move back and forth. The threading is driven when the raised feature 221 abuts the threading 24 and rotates, and the traction wheel 22 moves intermittently as the traction wheel 22 rotates to the non-raised feature with no load.

The intermittent motion provided by the raised features 221 of the traction wheel 22 adds turbulence to the smooth motion of the lead threading, thereby facilitating the threading of the lead 24 through the 90 straight bend 13 and the variable cross-section 15 of the connector tubing, while substantially reducing the traction required to pull the same length of the lead threading 24.

In this embodiment, the output shaft 211 of the transmission assembly has a splined feature that cooperates with a splined feature on the central bore of the traction wheel 22 to drive the traction wheel in motion. The intermittent motion from 221 adds disturbance and impact motion to the steady motion of the lead-through wire 24, the friction drive of the conventional clamping structure such as a nut to clamp the traction wheel 22 may loosen the traction wheel 22, and the spline drive may ensure the effective driving of the traction wheel 22 by the transmission assembly.

The traction wheel 22 may be a metal member or an elastic member such as a rubber member. The preferred traction wheel 22 is a rubber member, which can provide a larger deformation and friction force, and the traction wheel 22 has a complex and variable structure, which facilitates mass production of the mold. To better assist in threading 22 movement.

In order to better guide the threading wire 22 and prevent it from falling off, the traction wheel 22 may be provided with guard walls 223 on both sides, and the frame 21 may be provided with

guide tubes

212, 213 for the traction wire 22.

Example two:

the same features of this embodiment and the first embodiment are not described again, and the different features of this embodiment and the first embodiment are: as shown in fig. 3, in the present embodiment, two sets of front and rear transmission assemblies (only the output shaft 211 is shown) are disposed in the frame 21, and the traction wheel 22 has 3 uniformly distributed convex features 221, and the width or amplitude 225 of each convex feature 221 is less than or equal to about 60 °, that is, the width or amplitude 225 of each convex feature 221 is less than or equal to about 60 °. For example 58 deg., i.e., each drive stroke of the traction wheel 22 is less than or about equal to the idle stroke. The output torque of the motor is varied with the load and a shock is generated when the traction sheave 22 is shifted from the idle stroke to the driving stroke.

To ensure that sufficient turbulence and impact is present to assist the feed-through wire 24 in passing through the 90 ° bend 13 and the variable cross-section 15, each raised feature 221 is preferably driven by intermittent motion of the feed-through wire 24 with sufficient idle stroke to provide impact, so that the raised features 221 are preferably not excessive and not too wide. Meanwhile, the driving stroke and the idle stroke of the front pair of traction wheels 22 and the rear pair of traction wheels 22 can be staggered with each other, so that the corresponding convex features 221 on one pair of traction wheels 22 can be abutted against the two sides of the lead wire 24 and drive the lead wire 24 to do intermittent motion with about 58-degree stroke every 62 degrees, and the idle stroke of each time is reduced to 4 degrees by driving the front pair of traction wheels 22 and the rear pair of traction wheels 22, so that the idle stroke of each circle is only 12 degrees, and the lead wire 24 is guaranteed to be driven by the traction wheels 22 basically and continuously.

Each drive stroke of the traction wheels 22 that is less than or about equal to the idle stroke may allow one set of traction wheels 22 to drive the lead 24 while the other set of traction wheels 22 is idle. The intermittent motion of the convex features 221 reduces the motion stroke of the driving threading wire 24 at the same rotating speed, and the driving of the front pair of traction wheels 22 and the rear pair of traction wheels 22 can ensure that the intermittent motion of each convex feature 221 driving threading wire 24 has enough idle stroke to form impact and ensure that the threading wire 24 is driven by the traction wheels 22 basically and continuously.

Example three:

the features of this embodiment that are the same as those of the second embodiment are not described again, and the features of this embodiment that are different from those of the second embodiment are: still as shown in fig. 2, in the present embodiment, the centers of the front and rear pairs of traction wheels 22 may have an offset 23, so as to increase the disturbance of the threading wire 24, and make the threading wire 24 pass through the 90 ° straight bend 13 and the variable cross-section 15 more smoothly.

Example four:

the same features of this embodiment as those of the previous embodiments are not described again, and the different features of this embodiment from those of the previous embodiments are: in this embodiment, when the transmission assembly synchronously drives the pair of traction wheels 22, the protrusion heights 224 of the plurality of protrusion features 221 on the upper and lower pair of traction wheels 22 are different, and the lead-through wires 24 are driven to move at staggered positions on the upper and lower pair of traction wheels 22, so that the space where the upper and lower pair of traction wheels 22 tightly contact the lead-through wires 24 is the same each time, and the lead-through wires 24 continuously change at the upper and lower positions, thereby enhancing the disturbance of the lead-through wires 24, and enabling the lead-through wires 24 to more smoothly pass through the 90 ° straight bending angle 13 and the variable cross-section position 15.

It should be noted that in the above embodiment, each set of transmission assemblies may also drive only one traction wheel 22, the traction wheel 22 may be abutted against one side of the threading wire 24, and the other side of the threading wire 24 is held, for example, by a rotatable bearing, so as to drive the threading wire 24 to move back and forth.

The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

Other technical features than those described in the specification are known to those skilled in the art, and are not described herein in detail in order to highlight the innovative features of the present invention.

Claims

1. A traction wheel comprises a traction wheel body and is characterized in that at least one protruding feature is arranged on the outer edge of the traction wheel body, and a lead wire is driven to move intermittently by the protruding feature.

2. A threading machine comprises a motor and a rack, wherein a transmission assembly is arranged in the rack, and the motor drives the transmission assembly, and is characterized in that the rack is provided with a traction wheel according to claim 1, the transmission assembly drives at least one traction wheel, and the traction wheel can be abutted against a threading wire and drives the threading wire to move.

3. The threader of claim 2 wherein the drive assembly drives at least one pair of traction wheels in unison, the protruding features on the upper and lower pair of traction wheels abutting opposite sides of the threading wire and driving movement of the threading wire, the traction wheels having a plurality of protruding features, at least two of the protruding features having different heights and being staggered on the pair of traction wheels to drive movement of the threading wire.

4. The threader of claim 2 or 3 wherein the threader is driven by at least two sets of front and rear traction wheels, the raised features on the at least two sets of front and rear traction wheels causing one set of traction wheels to drive the threader while the other set of traction wheels is unloaded thereby ensuring substantially constant driven movement of the threader.

5. The threader of claim 4 wherein the centers of the front and rear sets of traction wheels are offset.

6. The threader of claim 4 wherein the traction wheel has three uniformly distributed raised features, each raised feature having a width less than or equal to about 60 °.

7. The threader of any one of claims 2 to 3 and 5 to 6 wherein the output shaft of the drive assembly has a splined feature which engages a splined feature in the central bore of the traction wheel to drive movement of the traction wheel.

8. The threader of any of claims 2 to 3, 5 to 7 wherein the traction wheel is a rubber member.

9. The threader of any of claims 2 to 3, 5 to 8 wherein the traction wheel further comprises retaining walls on each side.

10. The threader of any of claims 2 to 3, 5 to 9 wherein the frame is further provided with a guide tube for the pull wire.