A steel bar bending device and its usage method

Abstract

This invention discloses a rebar bending device and its usage method, belonging to the field of tunnel rebar construction technology. The device includes a support, a moving drive assembly, and a pre-bending drive assembly. The support houses a pressure roller assembly, a guide roller assembly, and a drive wheel assembly, with the center points of these assemblies not aligned. The pressure roller assembly is slidably connected to the support. The pre-bending drive assembly is mounted on the support and movably connected to the pressure roller assembly. The moving drive assembly is mounted on the support and connected to the drive wheel assembly. This rebar bending device integrates pre-bending and bending functions, is easy to operate, and has high bending efficiency for threaded rebars. Threaded rebars can be directly inserted into the device, which helps improve the bending efficiency of threaded rebars.

Description

Technical Field

[0001] This invention relates to a rebar bending device and its usage method, belonging to the field of tunnel rebar construction technology. Background Technology

[0002] In the construction of the invert arch sidewalls of railway and highway tunnels, it is necessary to bend the exposed invert arch steel bars. The general construction method is to bend them manually, but this method cannot form a standard arc, and the work is labor-intensive and inefficient.

[0003] Chinese patent document CN207103687U discloses a handheld rebar bending device. The device includes a motor and a three-wheel bending mechanism with a drive wheel. The motor is connected to the drive wheel via a transmission flexible shaft. In use, the movable plate is opened, the rebar to be bent is placed into the device, the movable plate is closed, and a spring pin is used to lock it. The switch is pressed, and the drive wheel rotates, moving the rebar. After bending, the handle is pulled, the spring pin is released, the movable plate is opened, and the rebar is removed, completing the rebar bending operation. This device allows for convenient bending of rebar on construction sites, reducing processing difficulty, improving efficiency, and eliminating space limitations. To improve adaptability to different rebar bending radii, the drive wheel shaft can be adjustable. Adjusting the relative positions of the drive wheel with driven wheel shafts A and B allows for different rebar bending radii to be achieved.

[0004] If a straight steel bar is placed into the three-wheel bending mechanism, driven by the driving wheel, the straight steel bar will gradually pass through the three-wheel bending mechanism. However, the straight steel bar after processing by the three-wheel bending mechanism does not change its curvature and remains a straight steel bar. Therefore, to achieve steel bar bending, the straight steel bar must first be pre-bent to the required curvature, then the movable plate must be opened to place the pre-bent steel bar into the three-wheel bending mechanism, and the relative positional relationship between the driving wheel and driven wheel axle A and driven wheel axle B must be adjusted to accommodate the required processing curvature of the steel bar before the steel bar bending process can begin. It is evident that steel bar pre-bending and bending are processed by different devices, which is inconvenient to operate and results in low steel bar bending efficiency. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the present invention provides a rebar bending device and its usage method.

[0006] This invention is achieved through the following technical solution:

[0007] A rebar bending device includes a support, a moving drive assembly, and a pre-bending drive assembly. The support is provided with a pressure roller assembly, a guide roller assembly, and a drive roller assembly, and the center points of the pressure roller assembly, the guide roller assembly, and the drive roller assembly are not on the same straight line. The pressure roller assembly is slidably connected to the support. The pre-bending drive assembly is disposed on the support and is movably connected to the pressure roller assembly. The moving drive assembly is disposed on the support and is connected to the drive roller assembly.

[0008] The mobile drive assembly includes a right-angle reducer and a motor. The right-angle reducer is mounted on a bracket and its power output end is connected to the drive wheel assembly. The motor is mounted on the right-angle reducer and its output shaft is connected to the power input end of the right-angle reducer.

[0009] The support includes two side plates arranged side by side, which are connected by multiple connecting plates.

[0010] The bracket is equipped with an adjusting nut at the top, a motor mounting plate at one end, and four limiting strips arranged side by side inside the bracket.

[0011] The bracket is equipped with a handle.

[0012] The pre-bending drive assembly includes a tightening screw and a handwheel, with the handwheel fitted onto one end of the tightening screw.

[0013] The pressure roller assembly includes a tensioning roller frame, a pressure roller, and a wheel axle A. The pressure roller is located inside the tensioning roller frame and is mounted on the wheel axle A via a bearing A. Both ends of the wheel axle A are connected to the tensioning roller frame.

[0014] The guide wheel assembly includes axle B and a guide wheel. Both ends of axle B are connected to a bracket, and the guide wheel is mounted on axle B via bearing B.

[0015] The drive wheel assembly includes a drive wheel shaft, a drive wheel, and an end cap. The drive wheel shaft passes through the bracket, and the middle part of the drive wheel shaft is movably connected to the bracket via a bearing C. One end of the drive wheel shaft is movably connected to the end cap via a bearing C, and the other end is connected to the movable drive assembly. The drive wheel is mounted on the drive wheel shaft and is connected to the drive wheel shaft via a key A. The drive wheel has multiple teeth.

[0016] A method of using a rebar bending device includes the following steps:

[0017] A. Insert the upper end of the threaded steel bar extending out of the small side wall into the steel bar bending device, and move the steel bar bending device down along the threaded steel bar until the steel bar bending device abuts against the small side wall.

[0018] B. The rotating pre-bending drive assembly drives the pressure roller assembly to move. Through the cooperation of the pressure roller assembly, guide roller assembly, and drive roller assembly, the threaded steel bar is pre-bent to the required arc.

[0019] C. By moving the drive assembly, the drive wheel assembly is rotated, causing the rebar bending device to move upward along the threaded rebar, thereby bending the threaded rebar into the required arc.

[0020] The beneficial effects of this invention are as follows:

[0021] 1. The rebar bending device integrates pre-bending and bending functions, is easy to operate and use, and has high bending efficiency for threaded rebars.

[0022] 2. Threaded steel bars can be directly inserted into the steel bar bending device, which helps to improve the bending efficiency of threaded steel bars.

[0023] 3. The radius of pre-bending and arc bending can be adjusted by moving the pressure roller assembly 4 through the pre-bending drive assembly, which is highly practical.

[0024] 4. The motor can transmit torque to the drive wheel shaft through a right-angle reducer, and then drive the drive wheel shaft to rotate forward and backward, pushing the entire rebar bending device to reciprocate along the threaded rebar, which can improve the bending effect of the device on the threaded rebar. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure after removing one of the side plates of the present invention;

[0026] Figure 2 This is a schematic diagram of the main structure of the present invention;

[0027] Figure 3 for Figure 2 Rear view;

[0028] Figure 4 for Figure 3 Top view;

[0029] Figure 5 This is a schematic diagram of the structure of the bracket of the present invention;

[0030] Figure 6 This is a schematic diagram of the front view of the bracket of the present invention;

[0031] Figure 7 This is a schematic diagram of the assembly structure of the pre-bending drive assembly and the pressure roller assembly of the present invention;

[0032] Figure 8 This is a schematic diagram of the assembly structure of the tightening screw and pressure roller assembly of the present invention;

[0033] Figure 9 This is a schematic diagram of the assembly structure of the mobile drive assembly and the drive wheel assembly of the present invention;

[0034] Figure 10This is a schematic diagram of the structure after the threaded steel bar is passed through the steel bar bending device;

[0035] Figure 11 This is a schematic diagram of the assembly structure of the rebar bending device with the threaded rebar after removing one of the side plates.

[0036] In the diagram: 1-Movement drive assembly, 2-Bracket, 20-Side plate, 21-Connecting plate, 22-Adjusting nut, 23-Motor mounting plate, 24-Limit strip, 3-Pre-bending drive assembly, 30-Tightening screw, 31-Handwheel, 4-Pressure roller assembly, 40-Pressure roller, 41-Tightening roller frame, 42-Wheel axle A, 5-Guide roller assembly, 50-Wheel axle B, 51-Guide roller, 6-Drive wheel assembly, 60-Drive wheel axle, 61-Key A, 62-Drive wheel, 63-Key B, 64-Bearing C, 65-End cap, 7-Handle, 8-Small side wall, 9-Threaded steel bar. Detailed Implementation

[0037] The technical solution of the present invention is further described below, but the scope of protection is not limited to what is described.

[0038] like Figures 1 to 11 As shown, the rebar bending device of the present invention includes a support 2, a moving drive assembly 1, and a pre-bending drive assembly 3. A pressure roller assembly 4, a guide roller assembly 5, and a drive roller assembly 6 are installed inside the support 2, and the center points of the pressure roller assembly 4, guide roller assembly 5, and drive roller assembly 6 are not on the same straight line. The pressure roller assembly 4 is slidably connected to the support 2. The pre-bending drive assembly 3 is mounted on the support 2 and movably connected to the pressure roller assembly 4. The moving drive assembly 1 is mounted on the support 2 and connected to the drive roller assembly 6. After the threaded rebar 9 is inserted into the support 2, the pressure roller assembly 4 is moved by the pre-bending drive assembly 3. With the cooperation of the guide roller assembly 5 and the drive roller assembly 6, the pressure roller assembly 4 pre-bends the threaded rebar 9 to the required arc. Then, the moving drive assembly 1 drives the entire device to move along the threaded rebar 9, thereby bending the threaded rebar 9 as a whole to the required arc. After the threaded rebar 9 is inserted into the rebar bending device, pre-bending and bending processing of the threaded rebar 9 are performed. The rebar bending device is easy to operate and has high bending efficiency for threaded rebar 9.

[0039] The mobile drive assembly 1 includes a right-angle reducer and a motor. The right-angle reducer is mounted on the bracket 2, and its power output end is connected to the drive wheel assembly 6. The motor is mounted on the right-angle reducer, and its output shaft is connected to the power input end of the right-angle reducer. In use, the motor can rotate in both directions. The motor transmits torque to the drive wheel shaft 60 through the right-angle reducer, and then the drive wheel shaft 60 drives the drive wheel 62 to rotate in both directions, thereby driving the rebar bending device to move unidirectionally on the threaded rebar 9, or to perform reciprocating motion on the threaded rebar 9.

[0040] The bracket 2 includes two side plates 20 arranged side by side, and the two side plates 20 are connected by multiple connecting plates 21.

[0041] An adjusting nut 22 is welded to the top of the bracket 2, and a motor mounting plate 23 is installed at one end of the bracket 2. Four limiting strips 24 are installed side by side inside the bracket 2. In use, the adjusting nut 22 is threadedly connected to the tightening screw 30; the right-angle reducer is installed on the bracket 2 through the motor mounting plate 23; the four limiting strips 24 limit the tightening wheel frame 41, so that it can only move linearly along the length of the limiting strips 24 inside the bracket 2, preventing the tightening wheel frame 41 from rotating with the tightening screw 30.

[0042] The support 2 is equipped with a handle 7. This facilitates the movement of the steel bar bending device via the handle 7.

[0043] The pre-bending drive assembly 3 includes a tightening screw 30 and a handwheel 31, with the handwheel 31 fitted onto one end of the tightening screw 30. Figure 8 As shown, the end of the tightening screw 30 away from the handwheel 31 is movably connected to the tightening wheel frame 41, and the tightening screw 30 can rotate relative to the tightening wheel frame 41.

[0044] The pressure roller assembly 4 includes a tensioning roller frame 41, a pressure roller 40, and a wheel axle A42. The pressure roller 40 is located inside the tensioning roller frame 41 and is mounted on the wheel axle A42 via a bearing A. Both ends of the wheel axle A42 are connected to the tensioning roller frame 41.

[0045] The guide wheel assembly 5 includes axle B50 and guide wheel 51. Both ends of axle B50 are connected to bracket 2, and guide wheel 51 is mounted on axle B50 via bearing B.

[0046] The drive wheel assembly 6 includes a drive wheel shaft 60, a drive wheel 62, and an end cap 65. The drive wheel shaft 60 passes through the bracket 2. The middle part of the drive wheel shaft 60 is movably connected to the bracket 2 via a bearing C64. One end of the drive wheel shaft 60 is movably connected to the end cap 65 via a bearing C64, and the other end is connected to the movable drive assembly 1. The drive wheel 62 is mounted on the drive wheel shaft 60 and connected to the drive wheel shaft 60 via a key A61. The drive wheel 62 has multiple teeth machined on it. In use, the end cap 65 is connected to the bracket 2 via screws. One end of the drive wheel shaft 60 is inserted into the power output shaft of the right-angle reducer and connected to the power output shaft via a key B63. The drive wheel 62 has multiple teeth that can partially engage with the threads on the threaded steel bar 9 to increase the coefficient of friction between the drive wheel 62 and the threaded steel bar 9, preventing slippage and ensuring that the steel bar bending device can move along the threaded steel bar 9 to achieve overall bending processing of the threaded steel bar 9.

[0047] A method of using a rebar bending device includes the following steps:

[0048] A. Insert the upper end of the threaded steel bar 9 extending out of the small side wall 8 into the steel bar bending device, and move the steel bar bending device down along the threaded steel bar 9 until the steel bar bending device abuts against the small side wall 8.

[0049] B. Rotate the pre-bending drive assembly 3 to drive the pressure roller assembly 4 to move. Through the cooperation of the pressure roller assembly 4, the guide roller assembly 5 and the drive roller assembly 6, the threaded steel bar 9 is pre-bent to the required arc.

[0050] C. By moving the drive assembly 1, the drive wheel assembly 6 is rotated, causing the rebar bending device to move upward along the threaded rebar 9, thereby bending the threaded rebar 9 into the required arc.

[0051] The working principle or usage process of the rebar bending device of the present invention is as follows:

[0052] Insert the upper end of the threaded steel bar 9 extending from the small side wall 8 into the steel bar bending device, and move the steel bar bending device down along the threaded steel bar 9 until the steel bar bending device abuts against the small side wall 8. Hold the handwheel 31 with both hands and drive the tightening screw 30 to rotate clockwise through the handwheel 31. Since the tightening screw 30 and the adjusting nut 22 form a screw-nut mechanism, the tightening screw 30 will push the pressure wheel 40 to press the threaded steel bar 9, and with the cooperation of the guide wheel 51 and the drive wheel 62, pre-bend the threaded steel bar 9 to the required arc. Start the motor, and the motor transmits torque to the drive wheel shaft 60 through the right angle reducer. Then, the drive wheel shaft 60 drives the drive wheel 62 to rotate. The teeth on the drive wheel 62 mesh with the threaded part on the threaded steel bar 9, thereby pushing the entire steel bar bending device to move upward along the threaded steel bar 9, and bending the threaded steel bar 9 to the required arc during the upward movement, forming an arc with a fixed radius to meet the docking requirements of the invert arch and the secondary lining steel bars.

[0053] The steel bar bending device and its method of use provided by this invention have the following beneficial effects:

[0054] 1. The rebar bending device integrates pre-bending and bending functions, is easy to operate and use, and has high bending efficiency for threaded rebar.

[0055] 2. Compared with the existing technology where the reinforcing bar can only be placed into the reinforcing bar bending device after the movable plate is opened, this application can directly insert the threaded reinforcing bar 9 into the reinforcing bar bending device, which helps to improve the bending processing efficiency of the threaded reinforcing bar 9.

[0056] 3. The radius of pre-bending and arc bending can be adjusted by moving the pressure roller assembly 4 through the pre-bending drive assembly 3, which is highly practical.

[0057] 4. The motor can transmit torque to the drive wheel shaft 60 through a right-angle reducer, and then drive the drive wheel 62 to rotate in both directions through the drive wheel shaft 60, which drives the entire rebar bending device to reciprocate along the threaded rebar 9, thereby improving the bending effect of the device on the threaded rebar 9.

Claims

1. A method of using a rebar bending device, characterized in that: The rebar bending device includes a support (2), a moving drive assembly (1), and a pre-bending drive assembly (3). The support (2) contains a pressure roller assembly (4), a guide roller assembly (5), and a drive wheel assembly (6). The center points of the pressure roller assembly (4), guide roller assembly (5), and drive wheel assembly (6) are not on the same straight line. The pressure roller assembly (4) is slidably connected to the support (2). The pre-bending drive assembly (3) is mounted on the support (2) and movably connected to the pressure roller assembly (4). The drive wheel assembly (6)... 6) Includes a drive wheel shaft (60), a drive wheel (62) and an end cap (65). The drive wheel shaft (60) passes through the bracket (2). The middle part of the drive wheel shaft (60) is movably connected to the bracket (2) through a bearing C (64). One end is movably connected to the end cap (65) through a bearing C (64), and the other end is connected to the moving drive assembly (1). The drive wheel (62) is mounted on the drive wheel shaft (60) and connected to the drive wheel shaft (60) through a key A (61). The drive wheel (62) has multiple teeth. The method of using the steel bar bending device includes the following steps: A. Insert the upper end of the threaded steel bar (9) extending out of the small side wall (8) into the steel bar bending device, and move the steel bar bending device down along the threaded steel bar (9) until the steel bar bending device abuts against the small side wall (8). B. Rotate the pre-bending drive assembly (3) to drive the pressure roller assembly (4) to move. Through the cooperation of the pressure roller assembly (4), the guide roller assembly (5) and the drive roller assembly (6) together, the threaded steel bar (9) is pre-bent to the required arc. C. By moving the drive assembly (1) to drive the drive wheel assembly (6) to rotate, the rebar bending device moves upward along the threaded rebar (9), thereby bending the threaded rebar (9) into the required arc.

2. The method of using the rebar bending device as described in claim 1, characterized in that: The mobile drive assembly (1) is mounted on the bracket (2) and connected to the drive wheel assembly (6). The mobile drive assembly (1) includes a right-angle reducer and a motor. The right-angle reducer is mounted on the bracket (2) and its power output end is connected to the drive wheel assembly (6). The motor is mounted on the right-angle reducer and its output shaft is connected to the power input end of the right-angle reducer.

3. The method of using the rebar bending device as described in claim 1, characterized in that: The bracket (2) includes two side plates (20) arranged side by side, and the two side plates (20) are connected by multiple connecting plates (21).

4. The method of using the rebar bending device as described in claim 2, characterized in that: The bracket (2) has an adjusting nut (22) on its top, a motor mounting plate (23) on one end, and four limiting strips (24) arranged side by side inside the bracket (2).

5. The method of using the rebar bending device as described in claim 1, 2, or 3, characterized in that: The bracket (2) is movably provided with a handle (7).

6. The method of using the rebar bending device as described in claim 1, characterized in that: The pre-bending drive assembly (3) includes a tightening screw (30) and a handwheel (31), with the handwheel (31) fitted onto one end of the tightening screw (30).

7. The method of using the rebar bending device as described in claim 1, characterized in that: The pressure roller assembly (4) includes a top clamping roller frame (41), a pressure roller (40) and a wheel axle A (42). The pressure roller (40) is located inside the top clamping roller frame (41) and is mounted on the wheel axle A (42) via a bearing A. Both ends of the wheel axle A (42) are connected to the top clamping roller frame (41).

8. The method of using the rebar bending device as described in claim 1, characterized in that: The guide wheel assembly (5) includes a wheel axle B (50) and a guide wheel (51). Both ends of the wheel axle B (50) are connected to the bracket (2), and the guide wheel (51) is mounted on the wheel axle B (50) through a bearing B.

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