CN111872284A

CN111872284A - Safe traction mechanism for steel bar straightening cutting machine

Info

Publication number: CN111872284A
Application number: CN202010727727.5A
Authority: CN
Inventors: 沈伟达
Original assignee: 沈伟达
Current assignee: Jiaxing kopuno Machinery Technology Co.,Ltd.
Priority date: 2020-07-23
Filing date: 2020-07-23
Publication date: 2020-11-03
Anticipated expiration: 2040-07-23
Also published as: CN111872284B

Abstract

The invention provides a safe traction mechanism for a steel bar straightening and cutting machine, which comprises a first rotating shaft, wherein a transmission belt wheel and a first belt wheel are sequentially fixed at the annular outer end of the first rotating shaft from right to left, a lower traction wheel is fixed at the left end of the first rotating shaft, the first belt wheel and the transmission belt wheel are both arranged between a first vertical plate and a second vertical plate, a tensioning belt wheel is fixed at the annular outer end of the second rotating shaft, the tensioning belt wheel is arranged between the first vertical plate and the second vertical plate, a bearing is rotatably arranged at the left end of the first rotating shaft, the bearing is connected with the left end of the first rotating shaft, the bearing is slidably arranged at the upper end of the first vertical plate, a rotating rod is rotatably arranged at the upper end of the connecting bearing, a gear transmission assembly is rotatably arranged at the upper end of the rotating rod, an electric cylinder is fixed at the upper end of the gear transmission assembly, an upper traction wheel and a second belt wheel are respectively fixed at the, the invention is convenient for adjusting the distance between the two traction wheels and has good use effect.

Description

Safe traction mechanism for steel bar straightening cutting machine

Technical Field

The invention discloses a safe traction mechanism for a steel bar straightening cutting machine, and belongs to the technical field of traction.

Background

For the follow-up type steel bar straightening and cutting machine, the steel bar continuously advances, the shearing mechanism carries out on-line shearing on the steel bar, the shearing mechanism generates larger reverse kinetic energy to the advancing steel bar, and the faster the steel bar speed is, the reverse kinetic energy and the speed are increased in a square ratio; and because the reinforcing steel bar is pushed to advance by the reinforcing steel bar straightening and cutting machine, and the front end of the reinforcing steel bar is suspended, the reinforcing steel bar with insufficient rigidity is easy to bend against the top at the shearing moment, and sometimes even can bend into a weight to cause safety accidents.

Chinese patent publication No. CN 108262424A's vice drive mechanism of bar straightening cutter sets up in shearing structure side ejection of compact one side, lead to the reinforcing bar, wherein use elastic component to adjust the height of going up the traction wheel, make it be suitable for pulling the reinforcing bar of multiple size, but according to the regulation structure in this scheme, one then when pulling to the great reinforcing bar of diameter, go up synchronous gear and go up the synchronous rebound suitable distance of traction wheel, there is the clearance between lower synchronous gear and the last synchronous gear this moment, can not reach the meshing transmission effect, two then when pulling to the great reinforcing bar of diameter, elastic component pressurized is great, thereby it is too big to make the power of last traction wheel reaction on the reinforcing bar, make the wearing and tearing between the two increase.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a safe traction mechanism for a reinforcement bar straightening and cutting machine, which aims to solve the problems in the background art.

In order to achieve the purpose, the invention is realized by the following technical scheme: a safe traction mechanism for a steel bar straightening and cutting machine comprises a bottom plate, wherein a first vertical plate and a second vertical plate are fixed at the upper end of the bottom plate, the first vertical plate is arranged on the left side of the second vertical plate, a first rotating shaft and a second rotating shaft horizontally penetrate through the inside of the second vertical plate, the second rotating shaft is arranged on the front upper side of the first rotating shaft, the left end of the second rotating shaft penetrates through the first vertical plate, a transmission belt wheel and a first belt wheel are sequentially fixed at the annular outer end of the first rotating shaft from right to left, a lower traction wheel is fixed at the left end of the first rotating shaft, the lower traction wheel is arranged on the left side of the first vertical plate, the first belt wheel and the transmission belt wheel are both arranged between the first vertical plate and the second vertical plate, a belt wheel is fixed at the annular outer end of the second rotating shaft, the belt wheel is arranged between the first vertical plate and the second vertical plate, a bearing is, the upper end of the connecting bearing is rotated to install the rotating rod, the upper end of the rotating rod is rotated to install the gear transmission assembly, the upper end of the gear transmission assembly is fixedly provided with the electric cylinder, the U-shaped frame with the opening facing downwards is fixedly arranged on the upper end of the first vertical plate, the shell of the electric cylinder is fixedly connected with the top end of the U-shaped frame, the left end and the right end of the gear transmission assembly are respectively fixedly provided with the upper traction wheel and the second belt wheel, the upper traction wheel is arranged right above the lower traction wheel, a guide groove for passing a reinforcing steel bar is formed between the upper traction wheel and the lower traction wheel, and the second belt wheel, the first belt wheel and the tensioning belt wheel are.

Furthermore, a first round hole and a second round hole are formed in the second vertical plate, bearings are arranged inside the first round hole and the second round hole, the first round hole is connected with the first rotating shaft through the bearings, and the second round hole is connected with the second rotating shaft through the bearings.

Furthermore, limiting plates are fixed at the left end and the right end of the connecting bearing respectively, grooves are formed in the left end and the right end of the first vertical plate respectively, extending plates are fixed at the lower parts of the two opposite ends of the limiting plates, and the extending plates are clamped inside the two grooves respectively.

Further, gear drive assembly includes the box, the output shaft is run through to the box left end, the fixed traction wheel that goes up of output shaft left end, the fixed first gear of output shaft annular outer end, the box right-hand member runs through the input shaft, the fixed second band pulley of input shaft right-hand member, the fixed second gear of input shaft annular outer end, second gear and first gear all establish inside just second gear and the meshing of first gear installation of box.

Further, the upper traction wheel comprises a wheel body, a cylinder and locking rods, the wheel body is sleeved at the annular outer end of the cylinder, a circular ring baffle is fixed at the annular outer end of the cylinder, the circular ring baffle is arranged at the right end of the wheel body, a guide rod is horizontally arranged in the cylinder and is coaxially installed with the cylinder, a guide block is sleeved at the annular outer end of the guide rod, the upper end face of the guide block is processed into a first inclined plane with a high left and a low right, the lower end face of the guide block is processed into a second inclined plane with a low left and a high right, the upper end and the lower end of the guide block are respectively provided with the locking rods, the front ends and the rear ends of the two locking rods are connected through elastic belts, the two locking rods respectively penetrate through grooves at the upper end and the lower end of the cylinder and respectively extend into insertion holes at the bottom end and the top end in the cylinder, the left end of the guide block is fixedly provided with a U-shaped pull rod with an opening facing right, the U-shaped pull rod penetrates through two hole grooves in the left end of the cylinder and extends to the left end of the cylinder, and the gear transmission assembly is identical to the lower traction wheel in structure.

Furthermore, an annular accommodating groove is formed in the annular outer end of the wheel body, and a rubber sleeve ring is installed inside the annular accommodating groove.

The invention has the beneficial effects that: 1. drive driving pulley through starter motor and rotate, thereby drive first pivot and rotate, and then drive first band pulley and traction wheel rotation down, first band pulley rotates and drives second band pulley and tensioning band pulley rotation through the belt, the tensioning band pulley plays the tensioning function, the second band pulley rotates and drives the traction wheel through gear drive assembly and rotates, gear drive assembly changes the rotation direction of second band pulley, make on traction wheel and traction wheel rotate towards opposite direction down, thereby the reinforcing bar that the drive was established between last traction wheel and lower traction wheel removes, realize traction function.

2. Move the U-shaped pull rod left, drive the guide block and move left, because the terminal surface all processes to the inclined plane about the guide block, and connect through the elastic band between two locking levers, so when the guide block moved left, two locking levers moved towards the drum inside under the elastic force effect of elastic band, move the U-shaped pull rod to extreme position left, the locking lever shifted out from the wheel body this moment to inside moving the drum completely, move the wheel body left and can separate wheel body and drum, realized the portable dismouting of wheel body and drum.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

FIG. 1 is a perspective view of a safety traction mechanism for a straightening and cutting machine of a steel bar according to the present invention;

FIG. 2 is a front view of a safety traction mechanism for a straightening and cutting machine of steel bars according to the present invention;

FIG. 3 is a schematic diagram of a gear transmission assembly in a safety traction mechanism for a straightening and cutting machine of a steel bar according to the present invention;

FIG. 4 is a schematic diagram of an upper traction wheel in the safety traction mechanism for the reinforcement bar straightening and cutting machine according to the present invention;

FIG. 5 is a cross-sectional view A-A of FIG. 4;

in the figure: 1-a bottom plate, 2-a first vertical plate, 3-a second vertical plate, 4-a first rotating shaft, 5-a second rotating shaft, 6-a transmission belt wheel, 7-a first belt wheel, 9-a second belt wheel, 11-an electric cylinder, 12-an upper traction wheel, 13-a gear transmission component, 14-a lower traction wheel, 15-a rotating rod, 16-a connecting bearing, 17-a tensioning belt wheel and 18-a belt, 131-a box body, 132-a first gear, 133-a second gear, 134-an input shaft, 161-a limiting plate, 20-a wheel body, 21-a rubber sleeve ring, 22-a cylinder, 23-a U-shaped pull rod, 24-a guide rod, 25-a spring, 26-a guide block, 27-an elastic band, 28-a circular ring baffle and 29-a locking rod.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

Referring to fig. 1-5, the present invention provides a technical solution: a safe traction mechanism for a steel bar straightening and cutting machine comprises a bottom plate 1, wherein a first vertical plate 2 and a second vertical plate 3 are fixed at the upper end of the bottom plate 1, the first vertical plate 2 is arranged at the left side of the second vertical plate 3, a first rotating shaft 4 and a second rotating shaft 5 horizontally penetrate through the interior of the second vertical plate 3, the second rotating shaft 5 is arranged at the front upper side of the first rotating shaft 4, the left end of the second rotating shaft 5 penetrates through the first vertical plate 2, a driving belt wheel 6 and a first belt wheel 7 are sequentially fixed at the annular outer end of the first rotating shaft 4 from right to left, a lower traction wheel 14 is fixed at the left end of the first rotating shaft 4, the lower traction wheel 14 is arranged at the left side of the first vertical plate 2, the first belt wheel 7 and the driving belt wheel 6 are both arranged between the first vertical plate 2 and the second vertical plate 3, a tensioning belt wheel 17 is fixed at the annular outer end of the second rotating shaft 5, the tensioning belt wheel 17 is arranged between the first vertical plate 2 and the second vertical plate, connect 16 upper ends of bearing and rotate installation bull stick 15, bull stick 15 upper ends are rotated installation gear drive assembly 13, gear drive assembly 13 upper end fixed

electronic jar

11, 2 fixed opening U-shaped frame 10 down in upper end of first riser, the casing and the 10 top fixed connection of U-shaped frame of electronic jar 11, gear drive assembly 13 is controlled both ends and is fixed respectively and go up traction wheel 12 and second band pulley 9, it installs directly over traction wheel 14 down to go up traction wheel 12, it is equipped with the guide way that is used for the reinforcing bar to pass through to go up between traction wheel 12 and the lower traction wheel 14, second band pulley 9, first band pulley 7 and tensioning band pulley 17 pass through belt 18 transmission and connect.

Specifically, be connected driving pulley 6 with starter motor through belt drive mechanism, starter motor work drives driving pulley 6 through belt drive mechanism and rotates, thereby it rotates to drive first pivot 4, and then drive first band pulley 7 and lower traction wheel 14 and rotate, first band pulley 7 rotates and drives second band pulley 9 and tensioning band pulley 17 through belt 18 and rotates, tensioning band pulley 17 plays the tensioning function, second band pulley 9 rotates and drives traction wheel 12 through gear drive subassembly 13 and rotates, gear drive subassembly 13 changes the rotation direction of second band pulley 9, make on traction wheel 12 and lower traction wheel 14 rotate towards opposite direction, thereby it removes to drive the reinforcing bar of establishing between last traction wheel 12 and lower traction wheel 14, realize traction function.

For reinforcing steel bars with different diameters, a person switches on a power supply of the electric cylinder 11, the electric cylinder 11 is started through a switch, the electric cylinder 11 works to drive the gear transmission assembly 13 to move up and down, the gear transmission assembly 13 moves up and down and simultaneously drives the second belt wheel 9 and the upper traction wheel 12 to move up and down, and then the connecting bearing 16 is driven by the rotating rod 15 to move back and forth on the upper end of the first vertical plate 2, the connecting bearing 16 moves back and forth to drive the tension belt wheel 17 and the second rotating shaft 5 to move back and forth, the electric cylinder 11 is stopped until the upper traction wheel 12 moves up to a proper height, and the tension belt wheel 17 is driven to move back and forth in the process of moving up and down by the upper traction wheel 12, so that when the second belt wheel 9 is at different heights, the tension belt wheel 17 can move back and forth to a proper position, real-time tensioning of the, the steel bars with different diameters are pulled.

Offer first round hole and second round hole in the second riser 3, first round hole and the inside bearing that all is equipped with of second round hole, first round hole passes through the bearing and is connected with first pivot 4, and the second round hole passes through the bearing and is connected with second pivot 5, the second riser 3 of being convenient for and first pivot 4 and the connection of second pivot 5.

Connecting bearing 16 and controlling both ends and all fixing limiting plate 161, the recess is all seted up at both ends about first riser 2, two relative one end lower part positions of limiting plate 161 are all fixed and are extended the board, two are extended the board and clamp respectively inside two recesses, limiting plate 161 is used for carrying out auxiliary stay to traction wheel 14 and second pivot 5 down, limiting plate 161 has realized controlling connecting bearing 16 spacing, and the extension board that clamps inside the recess can carry on spacingly to connecting bearing 16's upper and lower position.

The gear transmission assembly 13 comprises a box body 131, the left end of the box body 131 penetrates through an output shaft 135, a traction wheel 12 is fixed at the left end of the output shaft 135, a first gear 132 is fixed at the annular outer end of the output shaft 135, an input shaft 134 is penetrated through the right end of the box body 131, a second belt wheel 9 is fixed at the right end of the input shaft 134, a second gear 133 is fixed at the annular outer end of the input shaft 134, the second gear 133 and the first gear 132 are both arranged inside the box body 131 in a meshed mode, the second gear 133 and the first gear 132 are installed in a meshed mode, the second belt wheel 9 rotates to drive the input shaft 134 to rotate, so that the second gear 133 is driven to rotate, the second gear 133 is meshed with the first gear 132 and drives the first gear 132 to rotate, the first gear 132 rotates to drive the.

The upper traction wheel 12 comprises a wheel body 20, a cylinder 22 and locking rods 29, the wheel body 20 is sleeved at the annular outer end of the cylinder 22, the annular baffle 28 is fixed at the annular outer end of the cylinder 22, the annular baffle 28 is arranged at the right end of the wheel body 20, a guide rod 24 is horizontally arranged in the cylinder 22, the guide rod 24 and the cylinder 22 are coaxially arranged, a guide block 26 is sleeved at the annular outer end of the guide rod 24, the upper end face of the guide block 26 is processed into a first inclined plane with a high left and a low right, the lower end face of the guide block 26 is processed into a second inclined plane with a low left and a high right, the locking rods 29 are arranged at the upper end and the lower end of the guide block 26, the front ends and the rear ends of the two locking rods 29 are connected through elastic belts 27, the two locking rods 29 respectively penetrate through grooves at the upper end and the lower end of the cylinder 22 and respectively extend into insertion holes at the bottom end and, the left end of the guide block 26 is fixed with a U-shaped pull rod 23 with an opening facing right, the U-shaped pull rod 23 penetrates through two hole grooves at the left end of the cylinder 22 and extends to the left end of the cylinder 22, and the gear transmission assembly 13 and the lower traction wheel 14 have the same structure.

Specifically, the spring 25 is in a compressed state, the guide block 26 is pressed by the elastic force of the spring 25, so that the right end of the guide block 26 is stably attached to the right wall inside the cylinder 22, so that the locking rod 29 is stably inserted into the wheel body 20 to realize the connection between the cylinder 22 and the wheel body 20, when the wheel body 20 needs to be disassembled, the U-shaped pull rod 23 is moved leftwards to drive the guide block 26 to move leftwards, because the upper and lower end surfaces of the guide block 26 are all processed into inclined surfaces, and the two locking rods 29 are connected through the elastic band 27, when the guide block 26 moves leftwards, the two locking levers 29 are moved towards the inside of the cylinder 22, moving the U-shaped tie 23 to the left, under the action of the elastic force of the elastic band 27, to the extreme position, at which the locking levers 29 are moved out of the wheel body 20, and the wheel body 20 is completely moved into the cylinder 22, and the wheel body 20 and the cylinder 22 can be separated by moving the wheel body 20 leftwards, so that the wheel body 20 and the cylinder 22 can be conveniently disassembled and assembled.

Annular holding tank is seted up to wheel body 20 annular outer end, annular holding tank internally mounted rubber lantern ring 21, and rubber lantern ring 21 has realized buffer function, avoids producing too big extrusion force between wheel body 20 and the reinforcing bar.

The specific implementation mode is as follows: during the use, be connected driving pulley 6 with starter motor through belt drive mechanism, starter motor work drives driving pulley 6 through belt drive mechanism and rotates, thereby it rotates to drive first pivot 4, and then drive first band pulley 7 and lower traction wheel 14 and rotate, first band pulley 7 rotates and drives second band pulley 9 and tensioning band pulley 17 through belt 18 and rotates, tensioning band pulley 17 plays the tensioning function, second band pulley 9 rotates and drives traction wheel 12 through gear drive subassembly 13 and rotates, gear drive subassembly 13 changes the direction of rotation of second band pulley 9, make on traction wheel 12 and lower traction wheel 14 rotate towards opposite direction, thereby it establishes the reinforcing bar removal between last traction wheel 12 and lower traction wheel 14 to drive, realize traction function.

For reinforcing steel bars with different diameters, before a person pulls the reinforcing steel bars, the person firstly switches on a power supply of an electric cylinder 11, the electric cylinder 11 is started through a switch, the electric cylinder 11 works to drive a gear transmission assembly 13 to move up and down, the gear transmission assembly 13 moves up and down and simultaneously drives a second belt wheel 9 and an upper traction wheel 12 to move up and down, then a rotating rod 15 drives a connecting bearing 16 to move back and forth on the upper end of a first vertical plate 2, the connecting bearing 16 moves back and forth to drive a tensioning belt wheel 17 and a second rotating shaft 5 to move back and forth, the electric cylinder 11 is stopped until the upper traction wheel 12 moves up to a proper height, the upper traction wheel 12 drives the tensioning belt wheel 17 to move back and forth in the process of moving up and down, so that when the second belt wheel 9 is at different heights, the tensioning belt wheel 17 can move back and forth to a proper position, real-time tensioning of a belt 18 is ensured, the steel bars with different diameters are pulled.

The spring 25 is in a compressed state, the guide block 26 is extruded by the elasticity of the spring 25, so that the right end of the guide block 26 is stably attached to the right wall inside the cylinder 22, so that the locking rod 29 is stably inserted into the wheel body 20 to realize the connection between the cylinder 22 and the wheel body 20, when the wheel body 20 needs to be disassembled, the U-shaped pull rod 23 is moved leftwards to drive the guide block 26 to move leftwards, because the upper and lower end surfaces of the guide block 26 are all processed into inclined surfaces, and the two locking rods 29 are connected through the elastic band 27, when the guide block 26 moves leftwards, the two locking levers 29 are moved towards the inside of the cylinder 22, moving the U-shaped tie 23 to the left, under the action of the elastic force of the elastic band 27, to the extreme position, at which the locking levers 29 are moved out of the wheel body 20, and the wheel body 20 is completely moved into the cylinder 22, and the wheel body 20 and the cylinder 22 can be separated by moving the wheel body 20 leftwards, so that the wheel body 20 and the cylinder 22 can be conveniently disassembled and assembled.

While there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The utility model provides a bar straightening cutting machine is with safe drive mechanism which characterized in that: comprises a bottom plate (1), a first vertical plate (2) and a second vertical plate (3) are fixed at the upper end of the bottom plate (1), the first vertical plate (2) is arranged on the left side of the second vertical plate (3), a first rotating shaft (4) and a second rotating shaft (5) horizontally penetrate through the inside of the second vertical plate (3), the second rotating shaft (5) is arranged on the front upper side of the first rotating shaft (4), the left end of the second rotating shaft (5) penetrates through the first vertical plate (2), a driving belt wheel (6) and a first belt wheel (7) are sequentially fixed at the annular outer end of the first rotating shaft (4) from right to left, a lower traction wheel (14) is fixed at the left end of the first rotating shaft (4), the first belt wheel (7) and the driving belt wheel (6) are both arranged between the first vertical plate (2) and the second vertical plate (3), and a belt wheel (17) is fixed at the annular outer end of the second rotating shaft (5), the tensioning belt wheel (17) is arranged between the first vertical plate (2) and the second vertical plate (3), the left end of the first rotating shaft (4) is rotatably provided with the connecting bearing (16) and the connecting bearing (16) is slidably arranged at the upper end of the first vertical plate (2), the upper end of the connecting bearing (16) is rotatably provided with the rotating rod (15), the upper end of the rotating rod (15) is rotatably provided with the gear transmission component (13), the upper end of the gear transmission component (13) is fixedly provided with the electric cylinder (11), the upper end of the first vertical plate (2) is fixedly provided with the U-shaped frame (10) with a downward opening, the shell of the electric cylinder (11) is fixedly connected with the top end of the U-shaped frame (10), the left end and the right end of the gear transmission component (13) are respectively fixedly provided with the upper traction wheel (12) and the second belt wheel (9), the upper traction wheel (12) is arranged right above the lower traction wheel (14), and a guide groove for passing through of a reinforcing steel bar is arranged between, the second belt wheel (9), the first belt wheel (7) and the tensioning belt wheel (17) are in transmission connection through a belt (18).

2. The safety traction mechanism for the steel bar straightening and cutting machine according to claim 1, is characterized in that: a first round hole and a second round hole are formed in the second vertical plate (3), bearings are arranged inside the first round hole and the second round hole, the first round hole is connected with the first rotating shaft (4) through the bearings, and the second round hole is connected with the second rotating shaft (5) through the bearings.

3. The safety traction mechanism for the steel bar straightening and cutting machine according to claim 1, is characterized in that: limiting plates (161) are fixed at the left end and the right end of the connecting bearing (16), grooves are formed in the left end and the right end of the first vertical plate (2), extending plates are fixed at the lower part of the opposite end of each limiting plate (161), and the extending plates are clamped inside the grooves respectively.

4. The safety traction mechanism for the steel bar straightening and cutting machine according to claim 1, is characterized in that: gear drive subassembly (13) include box (131), output shaft (135) is run through to box (131) left end, traction wheel (12) are fixed to output shaft (135) left end, the fixed first gear (132) of output shaft (135) annular outer end, input shaft (134) are run through to box (131) right end, the fixed second band pulley (9) of input shaft (134) right end, the fixed second gear (133) of input shaft (134) annular outer end, second gear (133) and first gear (132) are all established at inside and second gear (133) of box (131) and first gear (132) meshing installation.

5. The safety traction mechanism for the steel bar straightening and cutting machine according to claim 1, is characterized in that: go up traction wheel (12) including wheel body (20), drum (22) and locking lever (29), drum (22) annular outer end suit wheel body (20), drum (22) annular outer end is fixed ring baffle (28) and ring baffle (28) are established at wheel body (20) right-hand member, drum (22) inside level sets up guide bar (24) and drum (22) coaxial arrangement, guide bar (24) annular outer end suit guide block (26), the up end processing of guide block (26) is the first inclined plane of high right side left side low, the lower terminal surface processing of guide block (26) is the high second inclined plane in low right side left side, both ends all are equipped with locking lever (29) about guide block (26), two locking lever (29) front end and rear end all connect through stretch-band (27), two locking lever (29) run through the logical groove at both ends about drum (22) respectively and extend to wheel body (20) inside bottom respectively And in the jack on inside top, guide bar (24) annular outer end suit spring (25) and spring (25) are installed between guide block (26) and the inside left wall of drum (22), U-shaped pull rod (23) that the fixed opening of guide block (26) left end is right, U-shaped pull rod (23) run through two apertures groove of drum (22) left end and extend to drum (22) left end, gear drive subassembly (13) are the same with lower traction wheel (14) structure.

6. The safety traction mechanism for the bar straightening cutting machine according to claim 5, characterized in that: an annular accommodating groove is formed in the annular outer end of the wheel body (20), and a rubber sleeve ring (21) is installed in the annular accommodating groove.