CN214349219U

CN214349219U - Automatic wire changing mechanism of automatic reinforcing steel bar hoop bending machine

Info

Publication number: CN214349219U
Application number: CN202022597514.3U
Authority: CN
Inventors: 陈振东; 其他发明人请求不公开姓名
Original assignee: TJK Machinery Tianjin Co Ltd
Current assignee: TJK Machinery Tianjin Co Ltd
Priority date: 2020-11-11
Filing date: 2020-11-11
Publication date: 2021-10-08
Anticipated expiration: 2030-11-11

Abstract

The utility model discloses an automatic mechanism of trading of automatic curved hoop machine of reinforcing bar belongs to the curved hoop technical field of reinforcing bar, for solving the poor scheduling problem design of prior art security. The automatic wire-changing mechanism of the automatic reinforcing steel bar hoop bending machine comprises a wire-releasing component, a motor driving component and a feeding component; the paying-off assembly comprises a connecting plate and at least two steel bar clamping units, each steel bar clamping unit comprises a sliding block and a spring, and a sliding block wire inlet hole is formed in each sliding block; the motor driving assembly comprises a wire inlet cylinder, a wire inlet pressing shaft is installed on the output end of the wire inlet cylinder, and the wire inlet pressing shaft is configured to push the sliding block to move towards the direction of the compression spring until the clamping state of the paying-off assembly on the reinforcing steel bar is released. The utility model discloses automatic curved hoop machine of reinforcing bar automatic wire-changing mechanism can put out the reinforcing bar of many different diameters side by side in same time for the selection, and the working effect is high, convenient to use, and the position of reinforcing bar is accurate reliable, has solved manual wire-changing unsafe and unstable problem.

Description

Automatic wire changing mechanism of automatic reinforcing steel bar hoop bending machine

Technical Field

The utility model relates to a curved hoop technical field of reinforcing bar especially relates to an automatic curved hoop machine of reinforcing bar is from moving line mechanism.

Background

A reinforcing steel bar hoop bending machine is processing equipment used for automatically bending reinforcing steel bars. During processing, the reinforcing steel bars need to be placed on the working position, and then the reinforcing steel bar hoop bending machine can bend the reinforcing steel bars.

In the prior art, it is common to use an automatic feeder to feed the bars to the work position. In order to improve the processing efficiency, the automatic feeding device can feed the next reinforcing steel bar after the previous reinforcing steel bar is fed to the position. In practice, the diameter of the desired rebar may vary, i.e., the diameter of the next rebar required may be larger or smaller than the diameter of the previous rebar.

Once the diameter of the steel bar is changed, the operator is required to manually take out the steel bar which is placed on the preparation position and place the steel bar to be replaced at the designated position in the prior art. The manual replacement of the reinforcing steel bars has certain potential safety hazards, and once the reinforcing steel bar hoop bending machine is operated by mistake, operators can be injured; due to the set height, the shielding of a shell at the periphery and the like, operators cannot clearly see the designated position, so that the manual replacement cannot ensure that the newly replaced reinforcing steel bar is in an ideal position; manual replacement of the reinforcing steel bars increases the labor intensity of operators, consumes long time and reduces the overall working efficiency.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an automatic mechanism of changing wire of automatic hoop bending machine of safe and reliable's reinforcing bar.

To achieve the purpose, the utility model adopts the following technical proposal:

an automatic wire-changing mechanism of an automatic reinforcing steel bar hoop bending machine comprises a wire-releasing assembly, a motor driving assembly and a feeding assembly, wherein the wire-releasing assembly is used for fixing the ends of reinforcing steel bars with different diameters; the paying-off assembly comprises a connecting plate, at least two steel bar clamping units are arranged in or on the connecting plate, each steel bar clamping unit comprises a sliding block and a spring, and a sliding block wire inlet hole is formed in the sliding block along the wire inlet direction of the steel bar; one end of the spring is connected to the sliding block and is in a compressed state, and the telescopic direction of the spring is perpendicular to the wire inlet direction of the steel bar; a connecting plate wire inlet hole is formed in the position, corresponding to each sliding block, of the connecting plate, and when no external force is applied to press the sliding block, the spring enables the axis of the connecting plate wire inlet hole to deviate from the axis of the sliding block wire inlet hole; the motor driving assembly comprises a wire inlet cylinder, a wire inlet pressing shaft is mounted at the output end of the wire inlet cylinder, and the wire inlet pressing shaft is configured to push the sliding block to move towards the direction of compressing the spring until the clamping state of the paying-off assembly on the reinforcing steel bar is released; the feeding assembly comprises a feeding motor, a feeding main shaft is mounted at the output end of the feeding motor, and a lower feeding wheel for driving the reinforcing steel bars to move is sleeved on the feeding main shaft; the feeding assembly further comprises a pressing cylinder, a feeding pressing shaft is mounted at the output end of the pressing cylinder and can abut against the sliding seat and push the sliding seat to move towards the direction of the lower feeding wheel, an upper feeding wheel is arranged on the sliding seat, and a gap allowing the steel bars to pass through is formed between the lower feeding wheel and the upper feeding wheel.

Particularly, the pay-off assembly further comprises a wire inlet plate, and the wire inlet plate is connected to the connecting plate; the wire inlet plate is provided with outer plate wire inlet holes along the wire inlet direction of the steel bars, the outer plate wire inlet holes correspond to the connecting plate wire inlet holes one to one, and the outer plate wire inlet holes and the connecting plate wire inlet holes are respectively formed in two ends of the sliding block wire inlet holes.

Especially, when reinforcing bar chucking unit sets up when in the connecting plate, follow on the connecting plate the flexible direction of spring has seted up the pine card through-hole, the slider with the spring all sets up in the pine card through-hole, inlet wire pressure shaft is configured to stretch into in the pine card through-hole in order to promote the slider is towards the compression the direction of spring removes.

Particularly, one end of the spring is connected to the sliding block, the other end of the spring abuts against a spring gland, and the spring gland is installed on the connecting plate.

Particularly, the feeding assembly further comprises a support plate, the sliding seat is slidably mounted on one side surface of the support plate, a sliding seat pressing plate is slidably mounted on the other side surface of the support plate and connected with the sliding seat, and a sliding seat lifting bolt is arranged on the sliding seat pressing plate; be provided with the cylinder bottom plate in the backup pad, be provided with fixing bolt on the cylinder bottom plate the slide lift bolt with be provided with the extension spring between the fixing bolt, the extending direction of extension spring with the flexible direction that pushes down the cylinder is parallel.

Particularly, a strip-shaped slideway port is formed in the supporting plate, the extending direction of the slideway port is consistent with the moving direction of the feeding pressure shaft, and the feeding pressure shaft can extend into the slideway port and push the sliding seat to move towards the direction of the lower feeding wheel; the sliding seat comprises an L-shaped sliding seat main body and a sliding seat limiting part positioned in the sliding seat opening, one end of the sliding seat limiting part is connected with the end part of the sliding seat main body, the other end of the sliding seat limiting part is connected with the sliding seat pressing plate, and the end part of the sliding seat main body and the sliding seat pressing plate are respectively attached to two sides of the supporting plate; an upper feeding wheel shaft is arranged on the sliding seat main body, and the upper feeding wheel is sleeved on the upper feeding wheel shaft.

In particular, the upper feed wheel spindle is located between the carriage body and the support plate.

Particularly, the support plate is provided with a long opening for the steel bar to pass through.

Particularly, the motor driving assembly further comprises an upper pressing plate and a lower pressing plate which are respectively arranged at two ends of the connecting plate, a screw rod, a first guide shaft and a second guide shaft are respectively arranged between the upper pressing plate and the lower pressing plate, the screw rod and the first guide shaft are positioned at one side of the connecting plate, and the second guide shaft is positioned at the other side of the connecting plate; one end of the screw rod is connected to the lower pressing plate, the other end of the screw rod penetrates through the upper pressing plate and then is connected to the output end of the driving motor, and the extending direction of the screw rod is consistent with the arrangement direction of the at least two reinforcing steel bar clamping units; the motor driving assembly further comprises an air cylinder fixing seat, and a threaded hole for penetrating the screw rod and an unthreaded hole for penetrating the first guide shaft are formed in the air cylinder fixing seat respectively; the cylinder fixing seat is installed on the frame, the inlet wire cylinder is installed on the cylinder fixing seat, the screw rod can pass through when rotating the top board the holding down plate with the connecting plate drives totally reinforcing bar chucking unit is followed the screw rod axis removes, until setting for reinforcing bar chucking unit with the inlet wire is pressed the axle and is aligned.

Particularly, the upper pressing plate and the lower pressing plate are respectively provided with a plurality of connecting holes for penetrating the screw rod, the first guide shaft and the second guide shaft, the connecting holes are in a step shape, at least one side end of the screw rod, the first guide shaft and the second guide shaft is in a step shape, and the step-shaped ends of the screw rod, the first guide shaft and the second guide shaft are respectively abutted against the step-shaped structures of the connecting holes.

The utility model relates to an automatic curved hoop machine of reinforcing bar automatic wire changing mechanism is including the unwrapping wire subassembly that is used for the reinforcing bar tip of fixed different diameters, a subassembly that advances that is used for driving the motor drive subassembly of reinforcing bar removal and is used for carrying the host computer with the reinforcing bar, can put out the reinforcing bar of many different diameters side by side in same time and select, the former reinforcing bar that is processing at present can withdraw from the processing position voluntarily when needs change the reinforcing bar, it moves new reinforcing bar position department to advance the subassembly, follow-up processing position department is sent into with new reinforcing bar to advance the wheel and feed down the wheel combined action on the utilization, the working effect is high, high durability and convenient use, the position accuracy of reinforcing bar is reliable, the problem that manual wire changing is unsafe and unstable has been solved.

Drawings

Fig. 1 is a schematic structural view of an automatic wire-changing mechanism of an automatic reinforcing steel bar hoop bending machine according to an embodiment of the present invention in a normal feeding state;

FIG. 2 is a left side view of the structure shown in FIG. 1;

FIG. 3 is an enlarged view of a portion of FIG. 2 at A;

FIG. 4 is a top view of the structure shown in FIG. 1;

FIG. 5 is a schematic view of the structure of FIG. 4 with the upper shroud removed;

FIG. 6 is a cross-sectional view taken along line B-B of the structure shown in FIG. 1;

fig. 7 is a schematic structural view of the automatic wire-changing mechanism of the automatic hoop bending machine for steel bars to be replaced according to the embodiment of the present invention;

fig. 8 is a left side view of the structure shown in fig. 7.

Detailed Description

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

The embodiment discloses an automatic wire changing mechanism of an automatic reinforcing steel bar hoop bending machine. As shown in fig. 1 to 8, the automatic wire-changing mechanism of the automatic rebar bender includes a wire-releasing assembly for fixing the ends of rebars 5 with different diameters, a motor-driving assembly for driving the rebars 5 to move, and a feeding assembly for feeding the rebars 5 to a main machine.

Wherein, unwrapping wire subassembly includes connecting plate 11, is provided with two at least reinforcing bar chucking units in connecting plate 11 or on connecting plate 11, and every reinforcing bar chucking unit includes slider 12 and spring 13, has seted up slider entrance hole 121 along the inlet wire direction of reinforcing bar 5 on the slider 12. One end of the spring 13 is connected to the slider 12, the other end abuts against a spring gland 15, and the spring gland 15 is mounted on the connecting plate 11.

In order to better hold reinforcing steel bars 5 with different diameters, the diameters of the slide block wire inlet holes 121 on different slide blocks 12 are correspondingly different; the number of the slider wire feeding holes 121 provided in each slider 12 is not limited, and may be one, two or more. One end of the spring 13 is connected to the sliding block 12, and the spring 13 is in a compressed state after being installed, and the telescopic direction of the spring 13 is perpendicular to the wire inlet direction of the steel bar 5, so that the sliding block 12 can be pushed to move along the wire inlet direction perpendicular to the steel bar 5. The connecting plate 11 is provided with a connecting plate wire inlet hole 111 corresponding to each slide block 12, when no external force presses the slide block 12, the spring 13 makes the axis of the connecting plate wire inlet hole 111 deviate from the axis of the slide block wire inlet hole 121, at this time, the part of the steel bar 5 in the connecting plate wire inlet hole 111 abuts against the upper side surface of the connecting plate wire inlet hole 111, the part of the steel bar 5 in the slide block wire inlet hole 121 abuts against the lower side surface of the slide block wire inlet hole 121, and the abutting position can generate larger friction force, so that the steel bar 5 is stably clamped and fixed at the slide block 12 and the connecting plate 11. After a certain steel bar 5 is selected, an external force is pressed on the sliding block 12 to enable the spring 13 to be extruded and shortened, the sliding block 12 moves downwards, the side wall of the steel bar 5 is not abutted to the upper side surface of the wire inlet 111 of the connecting plate or the lower side surface of the wire inlet 121 of the sliding block any more, the friction force is reduced, the steel bar 5 is not clamped and fixed at the sliding block 12 and the connecting plate 11, and the steel bar 5 can move back and forth under the action of traction force and enters a processing station of the next procedure or exits from the next procedure.

The motor driving assembly comprises a wire inlet cylinder 21, a wire inlet press shaft 22 is installed on the output end of the wire inlet cylinder 21, and the wire inlet press shaft 22 is configured to move along with the extension and retraction of the output end of the wire inlet cylinder 21 so as to push the slider 12 to move towards the direction of the compression spring 13 until the axis of the slider wire inlet hole 121 is close to or even coincides with the axis of the connecting plate wire inlet hole 111, so that the clamping and fixing state of the wire releasing assembly on the steel bar 5 is released. That is, the extension and contraction direction of the wire feeding cylinder 21 is parallel to the extension and contraction direction of the spring 13, and the downward pressure of the wire feeding pressure shaft 22 is the "external force" against the slider 12 mentioned in the above paragraph.

The feeding assembly comprises a feeding motor 31, a feeding main shaft 32 is installed at the output end of the feeding motor 31, and a lower feeding wheel 33 used for driving the reinforcing steel bars 5 to move is sleeved on the feeding main shaft 32; the feeding assembly further comprises a pressing cylinder 34, a feeding pressing shaft 35 is mounted at the output end of the pressing cylinder 34, the feeding pressing shaft 35 can abut against a sliding seat 36 and push the sliding seat 36 to move towards the direction of the lower feeding wheel 33, an upper feeding wheel 37 is arranged on the sliding seat 36, and a gap allowing the reinforcing steel bars 5 to pass through is formed between the lower feeding wheel 33 and the upper feeding wheel 37. After a steel bar 5 with a proper diameter is selected, the upper feeding wheel 37 and the lower feeding wheel 33 clamp the steel bar 5 together, the lower feeding wheel 33 rotates, and the steel bar 5 moves forwards or backwards under the driving of the lower feeding wheel 33 to enter or exit from a subsequent processing position.

The automatic wire-changing mechanism of the automatic steel bar hoop bending machine can simultaneously swing out a plurality of steel bars 5 with different diameters for selection through the cooperative work of the paying-off assembly, the motor driving assembly and the feeding assembly. When the reinforcing steel bar 5 needs to be replaced, the reinforcing steel bar 5 which is being processed at present can automatically exit from the processing position, the feeding assembly moves to the position of the new reinforcing steel bar 5, the new reinforcing steel bar 5 is fed into the subsequent processing position under the combined action of the upper feeding wheel 37 and the lower feeding wheel 33, the working effect is high, the use is convenient, the position of the reinforcing steel bar 5 is accurate and reliable, and the problems that manual wire replacement is unsafe and unstable are solved.

In order to realize that the feeding assembly can select the reinforcing bars 5 with different diameters, as shown in fig. 2 to 5, the motor driving assembly further includes an upper pressing plate 23, a lower pressing plate 24, a screw 25, a first guide shaft 261, a second guide shaft 262, a driving motor 27, and a cylinder fixing base 28. The upper pressing plate 23 and the lower pressing plate 24 are respectively arranged at two ends of the connecting plate 11, the screw 25, the first guide shaft 261 and the second guide shaft 262 are respectively arranged between the upper pressing plate 23 and the lower pressing plate 24, the screw 25 and the first guide shaft 261 are arranged at one side of the connecting plate 11, and the second guide shaft 262 is arranged at the other side of the connecting plate 11. One end of the screw 25 is connected to the lower press plate 24, and the other end is connected to the output end of the driving motor 27 after passing through the upper press plate 23. The inlet wire cylinder 21 is installed on cylinder fixing base 28, and cylinder fixing base 28 directly or indirectly installs in the frame, and cylinder fixing base 28 and inlet wire cylinder 21 do not take place to remove in whole device working process.

The cylinder fixing seat 28 is provided with a threaded hole for the screw rod 25 to pass through and an unthreaded hole for the first guide shaft 261 to pass through, and the axis of the threaded hole is parallel to the axis of the unthreaded hole. When the screw 25 rotates, all the reinforcing steel bar clamping units can be driven to move along the axis of the screw 25 through the upper pressing plate 23, the lower pressing plate 24 and the connecting plate 11 until the reinforcing steel bar clamping unit fixed with the reinforcing steel bar 5 to be replaced is aligned with the wire inlet pressing shaft 22. The first guide shaft 261 can play a guiding role, so that the upper pressing plate 23, the lower pressing plate 24 and the connecting plate 11 are prevented from rotating along with the rotation of the screw 25; the extending direction of the screw 25 is the same as the arrangement direction of all the reinforcing bar clamping units, and all the reinforcing bar clamping units can smoothly move along the screw 25.

As shown in fig. 6, the feeding assembly further includes a supporting plate 38 disposed on the frame, and the cylinder fixing base 28, the feeding motor 31, the lower feeding wheel 33, the pressing cylinder 34, the feeding pressing shaft 35, the sliding base 36, and the upper feeding wheel 37 are directly or indirectly mounted on the supporting plate 38. The supporting plate 38 is provided with a strip-shaped chute port 381, the extending direction of the chute port 381 is consistent with the moving direction of the feeding press shaft 35, and the feeding press shaft 35 can extend into the chute port 381 and push the slide 36 to move towards the direction of the downward feeding wheel 33.

The slide 36 includes a L-shaped slide main body 363 and a slide limiting portion 364 located in the slide port 381, one end of the slide limiting portion 364 is connected to an end of the slide main body 363, the other end is connected to a slide pressing plate 361, and the end of the slide main body 363 and the slide pressing plate 361 are respectively attached to two sides of the supporting plate 38. The slide body 363 is provided with an upper feeding wheel shaft 365, and the upper feeding wheel 37 is sleeved on the upper feeding wheel shaft 365. Preferably, the upper feed wheel shaft 365 is located between the carriage body 363 and the support plate 38. When reinforcing bars 5 with different diameters need to be replaced, the screw rod 25 rotates, and the screw rod 25 can drive all reinforcing bar clamping units to move along the axis of the screw rod 25 through the upper pressing plate 23, the lower pressing plate 24 and the connecting plate 11 until the reinforcing bar clamping unit fixed with the reinforcing bar 5 to be replaced is aligned with the wire inlet pressing shaft 22. The depressing cylinder 34 presses the upper feed roller 37 against the side wall of the reinforcing bar 5 through the feed pressing shaft 35 and the slider 36, thereby pressing the reinforcing bar 5 against the lower feed roller 33, and the lower feed roller 33 rotates, and the reinforcing bar 5 is pushed to move forward.

The specific installation manner of the feeding motor 31 and other structures is not limited, preferably, a through hole is formed on the support plate 38, the feeding motor 31 is installed on one side of the support plate 38, the feeding spindle 32 connected to the output end of the feeding motor 31 passes through the through hole, and the lower feeding wheel 33 is sleeved on the feeding spindle 32 on the other side of the support plate 38. In addition, the supporting plate 38 can be further provided with a cylinder bottom plate 341, a damping block and a fixing plate, the depressing cylinder 34 is installed on the fixing plate, the damping block is arranged between the cylinder bottom plate and the fixing plate, the damping effect is better when the depressing cylinder 34 works, and the whole machine is more stable and the noise is low.

On the basis of the above structure, the slide 36 is slidably mounted on one side surface of the support plate 38, a slide pressing plate 361 is slidably mounted on the other side surface of the support plate 38, the slide pressing plate 361 is connected with the slide 36, and a slide lifting bolt 362 is arranged on the slide pressing plate 361. The cylinder bottom plate 341 is provided with a fixing bolt 342, a tension spring 39 is provided between the carriage lifting bolt 362 and the fixing bolt 342, and the extension direction of the tension spring 39 is parallel to the extension and contraction direction of the depressing cylinder 34. When the depressing cylinder 34 extends, the feeding pressing shaft 35 pushes the sliding base 36 to move downwards, the distance between the sliding base lifting bolt 362 and the fixing bolt 342 is increased, and the tension spring 39 is greatly stretched; when the depressing cylinder 34 retracts, the feeding pressing shaft 35 moves away from the sliding base 36, the tension spring 39 contracts, the sliding base lifting bolt 362 approaches the fixing bolt 342 under the tension of the tension spring 39, and the sliding base 36 moves upwards synchronously with the sliding base lifting bolt 362.

The specific installation manner between the support plate 38 and the cylinder fixing seat 28 is not limited, and the support plate 38 can stably support the cylinder fixing seat 28. Preferably, a first fixed connecting plate is arranged on the cylinder fixing seat 28, a fixing seat for installing a second fixed connecting plate is arranged on the second guide shaft 262, positioning grooves are respectively arranged in the first fixed connecting plate and the second fixed connecting plate, and the supporting plate 38 is clamped in the positioning grooves and fixed on the first fixed connecting plate and the second fixed connecting plate through bolts. It should be noted that a gap is left between the first fixing link plate and the second fixing link plate for the reinforcing bar 5 to pass through.

The phrase "the reinforcing steel bar 5 passes through" does not mean that the reinforcing steel bar 5 needs to pass through between the first fixing connecting plate and the second fixing connecting plate when moving along the axis direction, but means that all reinforcing steel bar clamping units move along the screw 25 until the reinforcing steel bar clamping unit where the new reinforcing steel bar 5 is located is aligned with the wire inlet pressing shaft 22 when different reinforcing steel bars 5 are replaced, and in the process, at least one reinforcing steel bar 5 passes through the cylinder fixing seat 28 along the radial direction of the reinforcing steel bar 5, so that a gap for allowing the reinforcing steel bar 5 to pass through needs to be formed on the structure capable of preventing the reinforcing steel bar 5. Therefore, in addition to the gap between the first fixed connecting plate and the second fixed connecting plate, the support plate 38 is also provided with a long opening 382 for the reinforcing steel bar 5 to pass through transversely. The bottom of the slot 382 is tangent to the lower feed wheel 33 and the top is tangent to the upper feed wheel 37 when the hold-down cylinder 34 is retracted. The width of the long opening 382 is larger than the diameter of the coarsest reinforcing steel bar 5 required by processing; the bottom end of the long opening 382 is located at the outer side of the axis connecting line of the lower feeding wheel 33 and the upper feeding wheel 37 by a certain distance, the withdrawing distance of the original steel bar 5 during the replacement of the steel bar 5 is determined according to the position of the bottom end of the long opening 382, and the end of the original steel bar 5 is ensured not to be blocked by the bottom of the long opening 382.

The concrete structure of connecting plate 11 is not limited, can realize that the installation of reinforcing bar chucking unit and normal work can. Preferably, the connecting plate 11 is provided with a plurality of grooves. The connecting plate 11 is provided with a front end facing the direction of the steel bar 5, the groove is a structure with an opening on the front end surface and closed other surfaces (an upper end surface, a lower end surface, left and right side surfaces and a rear end surface), and the slide block 12 can be arranged in the groove. Connecting plate entrance hole 111 is seted up on the rear end face of recess, and a plurality of connecting plate entrance hole 111 can be different according to the diameter difference of reinforcing bar 5. An upper through hole is arranged on the upper end surface of the groove, a lower through hole is arranged on the lower end surface of the groove, and the upper through hole, the lower through hole and the groove are called loose clamping through holes 112. The spring 13 is installed in the lower through hole, and the line-feeding pressure shaft 22 can extend into the upper through hole to push the slider 12 to move downwards.

On the basis of the structure, the pay-off assembly further comprises a wire inlet plate 14, and the wire inlet plate 14 is connected to the connecting plate 11; an outer plate wire inlet hole 141 is formed in the wire inlet plate 14 along the wire inlet direction of the steel bar 5, the outer plate wire inlet holes 141 correspond to the connecting plate wire inlet holes 111 one by one, and the outer plate wire inlet holes 141 and the connecting plate wire inlet holes 111 are respectively formed in two ends of the sliding block wire inlet 121.

When no external force presses the slider 12, the spring 13 pushes the slider 12 to move upwards, the part of the steel bar 5 in the connecting plate wire inlet 111 abuts against the upper side surface of the connecting plate wire inlet 111, the part of the steel bar 5 in the slider wire inlet 121 abuts against the lower side surface of the slider wire inlet 121, the part of the steel bar 5 in the outer plate wire inlet 141 abuts against the upper side surface of the outer plate wire inlet 141, and the abutting positions can generate larger friction force, so that the steel bar 5 is stably clamped and fixed at the slider 12 and the connecting plate 11. When an external force is applied to the sliding block 12, the spring 13 is extruded and shortened, the sliding block 12 moves downwards, the side wall of the steel bar 5 does not abut against the upper side surface of the connecting plate wire inlet hole 111 and the upper side surface of the outer plate wire inlet hole 141 any more, the friction force is greatly reduced, the steel bar 5 is not clamped and fixed at the wire inlet plate 14, the sliding block 12 and the connecting plate 11, and the steel bar 5 can move back and forth under the action of traction force.

The upper and

lower press plates

23 and 24 are respectively provided with a plurality of connecting holes, which are stepped. The ends of the two sides of the first guide shaft 261 and the second guide shaft 262 are also step-shaped, the ends of the first guide shaft 261 and the second guide shaft 262 are respectively inserted into the connecting holes, the heads of the first guide shaft 261 and the second guide shaft 262 extend out of the outer sides of the upper pressing plate 23 and the lower pressing plate 24, guide shaft pressing covers are installed on the ends extending out of the first guide shaft 261 and the second guide shaft 262, and the guide shafts are fixed on the pressing plates by the guide shaft pressing covers. And nuts are respectively locked on the ends of the first guide shaft 261 and the second guide shaft 262 outside the guide shaft gland, so that the first guide shaft 261 and the second guide shaft 262 are installed.

The end of the screw rod 25 far away from the driving motor 27 is mounted on the lower pressing plate 24, and the connection structure between the screw rod 25 and the lower pressing plate 24 only limits the movement of the screw rod 25 along the axis thereof but cannot limit the rotation of the screw rod 25 around the axis thereof. Specifically, the connecting structure can be a normal flat head structure of the end of the screw 25, the connecting hole is in a step shape, and the end of the screw 25 is clamped in the step shape structure and can still rotate around the axis of the screw; or the end of the screw rod 25 is in a step shape, the connecting hole is a normal through hole or a step hole, and the end of the screw rod 25 can be clamped in the step-shaped structure and still can rotate around the axis of the screw rod.

The working process of normal feeding: as shown in fig. 1 to 6, the ends of the reinforcing bars 5 pass through the outer plate wire inlet 141, the slider wire inlet 121 and the connecting plate wire inlet 111 in sequence, the screw 25 rotates, and all the reinforcing bar clamping units arranged on the connecting plate 11 move along the screw 25 until the designated reinforcing bar 5 reaches the position of the wire inlet pressure shaft 22, and the end of the reinforcing bar 5 is positioned between the lower feeding wheel 33 and the upper feeding wheel 37; starting the wire inlet cylinder 21, enabling the wire inlet pressure shaft 22 to extend into the loosening through hole 112 to push the sliding block 12, enabling the spring 13 to contract, enabling the sliding block 12 to move downwards until the axes of the outer plate wire inlet hole 141, the sliding block wire inlet hole 121 and the connecting plate wire inlet hole 111 are overlapped, and enabling the reinforcing steel bar 5 to be in a loosened state from a clamped state; the pressing cylinder 34 presses the upper feed roller 37 against the side wall of the reinforcing bar 5 through the feed pressing shaft 35 and the slide 36, the upper feed roller 37 presses the reinforcing bar 5 against the lower feed roller 33 (at this time, the reinforcing bar 5 is slightly bent downward), the lower feed roller 33 rotates in the forward direction, and the reinforcing bar 5 is pushed to the main machine for the next processing.

And the working process of replacing the steel bars 5 is as follows: as shown in fig. 7 and 8, the lower feeding wheel 33 rotates reversely until the lower feeding wheel 33 stops rotating after the original steel bar 5 exits from the main machine; the air cylinder 34 is pressed to retract, the sliding seat 36 is lifted upwards by the tension spring 39, the upper feeding wheel 37 moves synchronously with the sliding seat 36 so as to be far away from the lower feeding wheel 33, and the reinforcing steel bars 5 are separated from the lower feeding wheel 33 after being restored (no longer bent downwards); the wire inlet cylinder 21 retracts the wire inlet press shaft 22, the slide block 12 moves upwards under the pushing of the spring 13, the part of the steel bar 5 in the wire inlet hole 111 of the connecting plate abuts against the upper side surface of the wire inlet hole 111 of the connecting plate, the part of the steel bar 5 in the wire inlet hole 121 of the slide block abuts against the lower side surface of the wire inlet hole 121 of the slide block, the part of the steel bar 5 in the wire inlet hole 141 of the outer plate abuts against the upper side surface of the wire inlet hole 141 of the outer plate, and the steel bar 5 is clamped and fixed at the slide block 12 and the connecting plate 11 by friction force; the screw 25 rotates, the connecting plate 11 drives all the reinforcing steel bar clamping units to move along the screw 25 until the reinforcing steel bar clamping unit where the new reinforcing steel bar 5 is located is aligned with the wire inlet pressing shaft 22, and then a normal feeding working process can be executed.

It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.

Claims

1. An automatic wire-changing mechanism of an automatic reinforcing steel bar hoop bending machine is characterized by comprising a wire-releasing assembly, a motor driving assembly and a feeding assembly, wherein the wire-releasing assembly is used for fixing the ends of reinforcing steel bars (5) with different diameters, the motor driving assembly is used for driving the reinforcing steel bars (5) to move, and the feeding assembly is used for conveying the reinforcing steel bars (5) to a main machine; wherein the content of the first and second substances,

the paying-off assembly comprises a connecting plate (11), at least two steel bar clamping units are arranged in the connecting plate (11) or on the connecting plate (11), each steel bar clamping unit comprises a sliding block (12) and a spring (13), and a sliding block wire inlet hole (121) is formed in each sliding block (12) along the wire inlet direction of each steel bar (5); one end of the spring (13) is connected to the sliding block (12) and is in a compressed state, and the telescopic direction of the spring (13) is perpendicular to the wire inlet direction of the steel bar (5); a connecting plate wire inlet hole (111) is formed in the position, corresponding to each sliding block (12), of the connecting plate (11), and when no external force presses against the sliding blocks (12), the spring (13) enables the axis of the connecting plate wire inlet hole (111) to deviate from the axis of the sliding block wire inlet hole (121);

the motor driving assembly comprises a wire inlet cylinder (21), a wire inlet pressing shaft (22) is installed on the output end of the wire inlet cylinder (21), and the wire inlet pressing shaft (22) is configured to push the sliding block (12) to move towards the direction of compressing the spring (13) until the clamping state of the paying-off assembly on the reinforcing steel bar (5) is released;

the feeding assembly comprises a feeding motor (31), a feeding main shaft (32) is mounted at the output end of the feeding motor (31), and a lower feeding wheel (33) used for driving the reinforcing steel bars (5) to move is sleeved on the feeding main shaft (32); the feeding assembly further comprises a pressing cylinder (34), a feeding pressing shaft (35) is installed at the output end of the pressing cylinder (34), the feeding pressing shaft (35) can abut against a sliding seat (36) and push the sliding seat (36) to move towards the direction of the lower feeding wheel (33), an upper feeding wheel (37) is arranged on the sliding seat (36), and a gap allowing the reinforcing steel bar (5) to pass through is formed between the lower feeding wheel (33) and the upper feeding wheel (37).

2. The automatic wire-changing mechanism of the automatic reinforcing steel bar hoop bending machine according to claim 1, wherein the wire-releasing assembly further comprises a wire-feeding plate (14), and the wire-feeding plate (14) is connected to the connecting plate (11); an outer plate wire inlet hole (141) is formed in the wire inlet plate (14) along the wire inlet direction of the steel bar (5), the outer plate wire inlet holes (141) correspond to the connecting plate wire inlet holes (111) in a one-to-one mode, and the outer plate wire inlet holes (141) and the connecting plate wire inlet holes (111) are arranged at two ends of the sliding block wire inlet hole (121) respectively.

3. The automatic wire-changing mechanism of the automatic reinforcement bar hoop bending machine according to claim 1, wherein when the reinforcement bar clamping unit is disposed in the connecting plate (11), a loose-clamping through hole (112) is formed in the connecting plate (11) along the expansion and contraction direction of the spring (13), the slider (12) and the spring (13) are both disposed in the loose-clamping through hole (112), and the wire-feeding pressure shaft (22) is configured to extend into the loose-clamping through hole (112) to push the slider (12) to move in a direction of compressing the spring (13).

4. The automatic wire-changing mechanism of the automatic reinforcing steel bar hoop bending machine according to claim 3, wherein one end of the spring (13) is connected to the sliding block (12), the other end of the spring abuts against a spring gland (15), and the spring gland (15) is installed on the connecting plate (11).

5. The automatic wire-changing mechanism of the automatic reinforcing steel bar hoop bending machine according to claim 1, wherein the feeding assembly further comprises a supporting plate (38), the sliding seat (36) is slidably mounted on one side surface of the supporting plate (38), a sliding seat pressing plate (361) is slidably mounted on the other side surface of the supporting plate (38), the sliding seat pressing plate (361) is connected with the sliding seat (36), and a sliding seat lifting bolt (362) is arranged on the sliding seat pressing plate (361); be provided with cylinder bottom plate (341) on backup pad (38), be provided with fixing bolt (342) on cylinder bottom plate (341) the slide lift bolt (362) with be provided with extension spring (39) between fixing bolt (342), the extending direction of extension spring (39) with the flexible direction of pushing down cylinder (34) is parallel.

6. The automatic wire-changing mechanism of the automatic reinforcing steel bar hoop bending machine according to claim 5, wherein a strip-shaped slideway port (381) is formed in the supporting plate (38), the extending direction of the slideway port (381) is consistent with the moving direction of the feeding pressing shaft (35), and the feeding pressing shaft (35) can extend into the slideway port (381) and push the sliding seat (36) to move towards the direction of the lower feeding wheel (33); the sliding seat (36) comprises an L-shaped sliding seat main body (363) and a sliding seat limiting part (364) located in the sliding channel opening (381), one end of the sliding seat limiting part (364) is connected with the end part of the sliding seat main body (363), the other end of the sliding seat limiting part is connected with the sliding seat pressing plate (361), and the end part of the sliding seat main body (363) and the sliding seat pressing plate (361) are respectively attached to two sides of the supporting plate (38); an upper feeding wheel shaft (365) is arranged on the sliding seat main body (363), and the upper feeding wheel (37) is sleeved on the upper feeding wheel shaft (365).

7. The automatic wire-changing mechanism of automatic reinforcing bar hoop bending machine according to claim 6, wherein the upper feed wheel shaft (365) is located between the slide body (363) and the support plate (38).

8. The automatic wire-changing mechanism of the automatic reinforcing steel bar hoop bending machine according to claim 5, wherein the support plate (38) is provided with a long opening (382) for the reinforcing steel bar (5) to pass through.

9. The automatic wire-changing mechanism of the automatic reinforcing steel bar hoop bending machine according to any one of claims 1 to 8, wherein the motor driving assembly further comprises an upper pressing plate (23) and a lower pressing plate (24) respectively arranged at two ends of the connecting plate (11), a screw (25), a first guide shaft (261) and a second guide shaft (262) are respectively arranged between the upper pressing plate (23) and the lower pressing plate (24), the screw (25) and the first guide shaft (261) are positioned at one side of the connecting plate (11), and the second guide shaft (262) is positioned at the other side of the connecting plate (11); one end of the screw rod (25) is connected to the lower pressing plate (24), the other end of the screw rod penetrates through the upper pressing plate (23) and then is connected to the output end of the driving motor (27), and the extending direction of the screw rod (25) is consistent with the arrangement direction of the at least two reinforcing steel bar clamping units; the motor driving assembly further comprises an air cylinder fixing seat (28), and a threaded hole for penetrating the screw rod (25) and an unthreaded hole for penetrating the first guide shaft (261) are respectively formed in the air cylinder fixing seat (28); cylinder fixing base (28) are directly or indirectly installed in the frame, inlet wire cylinder (21) are installed on cylinder fixing base (28), screw rod (25) can pass through when rotating top board (23) holding down plate (24) with connecting plate (11) drive entirely the reinforcing bar chucking unit is followed screw rod (25) axis removes, until setting up the reinforcing bar chucking unit with inlet wire pressure shaft (22) align.

10. The automatic wire-changing mechanism of the automatic reinforcing steel bar hoop bending machine according to claim 9, wherein a plurality of connecting holes for penetrating the screw rod (25), the first guide shaft (261) and the second guide shaft (262) are respectively formed in the upper pressing plate (23) and the lower pressing plate (24), the connecting holes are stepped, at least one side end of the screw rod (25), the first guide shaft (261) and the second guide shaft (262) is stepped, and the stepped ends of the screw rod (25), the first guide shaft (261) and the second guide shaft (262) respectively abut against the stepped structure of the connecting holes.