Steel bar bender

Abstract

The utility model discloses a steel bar bender which comprises a working box, the top of the working box is provided with a rotating disc flush with the table top of the working box, the center of the rotating disc is provided with a center pin shaft, and the position, corresponding to one side of the center pin shaft, of the rotating disc is provided with a bending pin shaft. A position fixing block capable of stretching back and forth is further arranged at the position, on the same side with the bending pin shaft, of the working box, and the position fixing block and the bending pin shaft are arranged side by side. The position fixing block is controlled to move through the electrically-driven sliding seat, the proximity switch is arranged at the end of the position fixing block, and when the position fixing block abuts against the surface of a steel bar, the sensing end of the proximity switch is just in contact with the surface of the steel bar, so that the proximity switch is triggered to control the sliding seat to stop running, and the position fixing block is driven to move. In this way, automatic clamping operation of the retention block can be achieved, manual adjustment of workers is omitted, and great convenience is brought to bending work of reinforcing steel bars.

Description

Technical Field

[0001] The utility model relates to the technical field of steel bar processing equipment, in particular to a steel bar bender. Background Art

[0002] A steel bar bender is one of the common steel bar processing machines in the civil engineering construction process. Its common state is to set a rotating disc on the top of the frame, and set a central pin shaft and a bending pin shaft on the rotating disc. And on the frame, retaining blocks are also arranged in cooperation with each pin shaft. By controlling the rotation of the rotating disc, the steel bar is folded into the required angle. Among them, the end of the retaining block directly abuts against the surface of the steel bar, so as to play a role in retaining the steel bar. However, for the common benders currently, the retaining blocks mainly adopt two position adjustment methods. The first is to open a long strip-shaped chute on the retaining block, and then use a screw to adjust and fix the retaining block and the frame. The other is to install the retaining block on a lead screw, and rotate the lead screw by controlling the handwheel, so as to realize the movement of the retaining block. However, both of the above two adjustment methods require manual adjustment by the staff. For the bending work of steel bars of different specifications, the position of the retaining block needs to be adjusted continuously, which brings great inconvenience to the use of the bender. Content of the Utility Model

[0003] The purpose of the utility model is to avoid the deficiencies of the prior art and provide a steel bar bender, so as to effectively solve the deficiencies existing in the prior art.

[0004] To achieve the above purpose, the technical solution adopted by the utility model is: a steel bar bender, including a working box, a rotating disc flush with the tabletop is arranged on the top of the working box. The rotating disc is provided with a central pin shaft at its center, and a bending pin shaft is arranged on the rotating disc at a position corresponding to one side of the central pin shaft. The working box is also provided with a retractable retaining block at a position on the same side as the bending pin shaft, and the retaining block is arranged side by side with the bending pin shaft;

[0005] A slidable seat that can move back and forth is arranged on the working box at a position corresponding to the rear side of the rotating disc. The slidable seat moves in an electric drive mode. The retaining block is installed on the slidable seat. A proximity switch for controlling the operation of the slidable seat is arranged at one end of the retaining block facing the central pin shaft, and the sensing head of the proximity switch is flush with the front end of the retaining block.

[0006] Further, a servo motor is also arranged on the slidable seat. The rotating shaft of the servo motor vertically passes through the slidable seat. A transmission gear is arranged at one end of the rotating shaft of the servo motor passing through the slidable seat. A rack is also arranged on the working box along the front-back direction. The transmission gear meshes with the rack, and the proximity switch can control the operation of the servo motor.

[0007] Further, a linear slide rail is provided at the rear side of the work box corresponding to the position of the sliding seat. A slider is provided at the lower end of the sliding seat, and the slider is mounted on the linear slide rail and moves back and forth along the linear slide rail.

[0008] Further, a positioning mechanism is also provided at the position of the work box corresponding to the retaining block, and the positioning mechanism is located between the rotating disk and the sliding seat.

[0009] Further, the positioning mechanism includes a bracket spanning above the retaining block. A positioning cylinder is provided at the top of the bracket, the piston rod of the positioning cylinder is arranged vertically downward, and a positioning pin is provided at the end of the piston rod. A plurality of positioning holes are evenly distributed along the front-back direction on the retaining block, and a positioning groove is provided on the work box corresponding to the position of the positioning pin. The positioning pin passes through the positioning hole and is inserted into the positioning groove.

[0010] Further, a plurality of mounting holes are evenly distributed along the circumferential direction on the surface of the rotating disk, and the bending pin shaft is inserted into any one of the mounting holes.

[0011] The above technical solution of the present utility model has the following beneficial effects: The present utility model controls the movement of the retaining block through an electrically driven sliding seat, and a proximity switch is provided at the end of the retaining block. When the retaining block abuts against the surface of the steel bar, the sensing head of the proximity switch just contacts the surface of the steel bar, thereby triggering the proximity switch and controlling the sliding seat to stop operating. In this way, the automatic clamping operation of the retaining block can be realized, eliminating the need for manual adjustment by the staff and bringing great convenience to the bending work of the steel bar. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a schematic top plan structure view of an embodiment of the present utility model;

[0013] Figure 2 is a schematic right-side perspective plan structure view of an embodiment of the present utility model;

[0014] Figure 3 is a schematic rear-side perspective view at the sliding seat of an embodiment of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] In order to more clearly understand the above objects, features and advantages of the present utility model, the present utility model will be further described in detail below with reference to the drawings and specific embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0016] In the following description, many specific details are set forth in order to provide a thorough understanding of the present utility model. However, the present utility model may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present utility model is not limited by the specific embodiments disclosed below.

[0017] As Figures 1 - 3 shown, a steel bar bender according to this embodiment includes a working box 1. A rotating disk 2 flush with the tabletop thereof is provided at the top of the working box 1. A central pin shaft 3 is provided at the center of the rotating disk 2. A bending pin shaft 15 is provided at a position on the rotating disk 2 corresponding to one side of the central pin shaft 3. A retractable retaining block 4 is also provided at a position on the working box 1 on the same side as the bending pin shaft 15. The retaining block 4 is arranged side by side with the bending pin shaft 15.

[0018] A slidable seat 5 that can move back and forth is provided at a position on the working box 1 corresponding to the rear side of the rotating disk 2. The slidable seat 5 is moved in an electrically driven manner. The retaining block 4 is installed on the slidable seat 5. A proximity switch 6 for controlling the operation of the slidable seat 5 is provided at one end of the retaining block 4 facing the central pin shaft 3. The sensing head of the proximity switch 6 is flush with the front end of the retaining block 4.

[0019] A servo motor 7 is also provided on the slidable seat 5. The rotating shaft of the servo motor 7 passes vertically downward through the slidable seat 5. A transmission gear 8 is provided at one end of the rotating shaft of the servo motor 7 passing through the slidable seat 5. A rack 9 is also provided on the working box 1 along the front - rear direction. The transmission gear 8 meshes with the rack 8. The proximity switch 6 can control the operation of the servo motor 7.

[0020] Two linear slide rails 10 are provided at the rear side of the working box 1 corresponding to the position of the slidable seat 5. A slider 11 is provided at the lower end of the slidable seat 5. The slider 11 is installed on the linear slide rails 10 and moves back and forth along the linear slide rails 10. There are two linear slide rails 10. The rack 9 is installed at a position between the two linear slide rails 10 on both sides.

[0021] A positioning mechanism is also provided at a position on the working box 1 corresponding to the retaining block 4. The positioning mechanism is located between the rotating disk 2 and the slidable seat 5.

[0022] The positioning mechanism includes a bracket 12 straddling above the retaining block 4. A positioning cylinder 13 is provided at the top of the bracket 12. The piston rod of the positioning cylinder 13 is arranged vertically downward. A positioning pin 14 is provided at the end of the piston rod. A plurality of positioning holes 4a are evenly distributed along the front - rear direction on the retaining block 4. A positioning groove is provided at a position on the working box 1 corresponding to the positioning pin 14. The positioning pin 14 passes through the positioning holes 4a and is inserted into the positioning groove. The positioning pin 14 is used to lock the position of the retaining block 4, so that the retaining block 4 can better retain the steel bar 16.

[0023] A plurality of mounting holes 2a are circumferentially and uniformly arranged on the surface of the rotating disk 2. The bent pin 15 is inserted into any one of the mounting holes 2a. By installing the bent pin 15 in different mounting holes 2a, it can be adjusted according to the specifications of the steel bars.

[0024] The working principle of the present utility model is as follows: First, according to the specifications of the steel bar 16, the bent pin 15 is installed in the corresponding mounting hole 2a on the rotating disk 2. Subsequently, the steel bar 16 is passed through the gap between the central pin 3 and the bent pin 15. Then, the servo motor 7 is started and it controls the movement of the sliding seat 5, so that the retaining block 4 moves towards the steel bar 16. When the end of the retaining block 4 abuts against the surface of the steel bar 16, the sensing head of the proximity switch 6 also just contacts the surface of the steel bar 16. At this time, the proximity switch 6 is triggered to send a signal to control the servo motor 7 to stop running, so that the retaining block 4 can be controlled to just tightly abut against the steel bar 16. Then, the positioning cylinder 13 starts to operate and its piston rod extends downward, so as to control the positioning pin 14 to pass through the corresponding positioning hole 4a on the retaining block 4 and abut tightly in the positioning groove on the working box 1. The positioning pin 14 can reinforce the position of the retaining block 4, thus ensuring the normal progress of the bending work of the steel bar 16. Subsequently, the rotating disk 2 starts to rotate and drives the bent pin 15 thereon to apply an external force to the steel bar 16. Under the action of the bent pin 15, the steel bar 16 rotates along the outer circumference of the central pin 3, thus completing the bending work of the steel bar 16. When changing the specifications of the steel bar 16, the piston rod of the positioning cylinder 13 is retracted, and the servo motor 7 is controlled to drive the retaining block 4 to move to adapt to the new specifications of the steel bar 16.

[0025] The embodiments of the present utility model are given for purposes of illustration and description, and are not exhaustive or limit the present utility model to the disclosed form. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present utility model, and enable those of ordinary skill in the art to understand the present utility model and thus design various embodiments with various modifications suitable for specific purposes.

Claims

1. A steel bar bending machine, characterized in that: The working box comprises a work box, the top of which is provided with a rotating disk flush with the table surface, the rotating disk is provided with a center pin at the center thereof, a bending pin is provided on the rotating disk at a position corresponding to one side of the center pin, the working box is further provided with a retaining block which can be telescopic forward and backward at a position on the same side as the bending pin, and the retaining block is arranged side by side with the bending pin; A sliding seat that can move forward and backward is arranged on the working box at a position corresponding to the rear side of the rotating disk. The sliding seat is moved by electric drive. The retaining block is installed on the sliding seat. The retaining block is provided with a proximity switch at one end facing the center pin shaft for controlling the operation of the sliding seat. The sensing head of the proximity switch is flush with the front end of the retaining block.

2. A steel bar bending machine according to claim 1, characterized in that: A servo motor is also provided on the sliding seat, and the rotating shaft of the servo motor passes through the sliding seat vertically downward. A transmission gear is also provided at one end of the rotating shaft of the servo motor passing through the sliding seat. A rack is also provided along the front and rear directions of the working box, and the transmission gear and the rack are meshed with each other. The proximity switch can control the operation of the servo motor.

3. A steel bar bending machine according to claim 2, characterized in that: A linear slide rail is arranged on the rear side of the working box at a position corresponding to the sliding seat, and a sliding block is arranged at the lower end of the sliding seat. The sliding block is installed on the linear slide rail and moves forward and backward along the linear slide rail.

4. A steel bar bending machine according to claim 1, characterized in that: The working box is further provided with a positioning mechanism at a position corresponding to the retaining block, and the positioning mechanism is located between the rotating disk and the sliding seat.

5. A steel bar bending machine according to claim 4, characterized in that: The positioning mechanism includes a bracket spanning above the retaining block, a positioning cylinder is arranged on the top of the bracket, the piston rod of the positioning cylinder is arranged vertically downward, and a positioning pin is arranged at the end of the piston rod. The retaining block is evenly provided with a plurality of positioning holes along the front-to-back direction, and a positioning groove is provided on the working box at a position corresponding to the positioning pin, and the positioning pin passes through the positioning hole and is inserted into the positioning groove.

6. A steel bar bending machine according to claim 1, characterized in that: The surface of the rotating disk is evenly provided with a plurality of mounting holes along the circumferential direction, and the bending pin is inserted into any one of the mounting holes.

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