Steel bar bending device

Abstract

The utility model belongs to the technical field of building material processing, and particularly discloses a steel bar bending device which comprises a pushing unit and a movable die, the output end of the pushing unit is connected with the movable die, and the pushing unit can drive the movable die to move in a reciprocating mode. At least one bending plate is rotationally matched with the movable mold, and a rotation driving unit for driving the bending plate to rotate is arranged on the movable mold. According to the steel bar bending device, steel bars can be bent at different angles under the condition that the die does not need to be replaced.

Description

Technical Field

[0001] The utility model relates to the technical field of building material processing, and particularly relates to a steel bar bending device. Background Art

[0002] Currently, when bending steel bars in the vertical direction for the steel bar cages of foundation piles and building steel bar skeletons, when bending the already cast and tied steel bars, the main method is to manually hold a steel bar bending and folding device to bend the steel bars. This method wastes manpower and material resources, has low efficiency, and cannot guarantee the quality of steel bar bending.

[0003] Moreover, when the existing hand-held steel bar bending and folding device needs to change the bending angle of the steel bar, generally different molds are replaced or the staff judges and observes the bending degree of the steel bar according to experience during the folding process, so as to control the pushing distance of the air cylinder on the folding mold. The operation is cumbersome and difficult. At the same time, during the folding process of the steel bar, the steel bar cannot be effectively limited and fixed, and situations such as excessive bending force are likely to occur, causing the steel bar to bounce out, etc., and there are safety hazards. Content of the Utility Model

[0004] The utility model provides a steel bar bending device, aiming at being able to perform bending operations on steel bars at different angles without replacing the mold.

[0005] The utility model is realized by the following technical solutions: A steel bar bending device includes a pushing unit and a moving mold. The output end of the pushing unit is connected to the moving mold, and the pushing unit can drive the moving mold to reciprocate.

[0006] At least one bending plate is rotatably matched on the moving mold, and a rotation driving unit for driving the bending plate to rotate is arranged on the moving mold.

[0007] Compared with the prior art, this solution has the following advantages and beneficial effects:

[0008] In this solution, by driving the moving mold to move towards the steel bar by the pushing unit, the bending plate on the moving mold can squeeze the steel bar to bend the steel bar. The bending plate in this solution is rotatably matched with the moving mold. By adjusting the angle of the bending plate through the rotation driving unit, different angle bending operations on the steel bar can be controlled. This solution can flexibly adjust the angle of the bending plate according to actual needs, is convenient to operate, and can realize bending of steel bars at different angles without replacing the mold, with higher operation efficiency and simpler operation difficulty.

[0009] Furthermore, the pushing unit includes a fixed body and an output end capable of performing telescopic movement. An installation plate is connected to the fixed body of the pushing unit. The moving mold is located on the installation plate and can slide linearly along the installation plate. A fixed mold is also connected to the installation plate. The fixed mold is arranged opposite to the moving mold. The bending plate is arranged facing the fixed mold and is perpendicular to the installation plate.

[0010] Beneficial effects: In this solution, the fixed mold can limit the position of the steel bar. In this way, when bending the steel bar, there is no need to add other blocking parts to support and limit the steel bar, which is more convenient to use. In this solution, the fixed mold can support the steel bar when the bending plate bends the steel bar, enabling the bending plate to perform bending operations on the bending position of the steel bar more quickly and accurately, and the bending quality is higher.

[0011] Furthermore, a positioning block is slidably engaged with the fixed mold in a direction perpendicular to the installation plate, and a lifting drive unit for driving the positioning block to move up and down is provided on the fixed mold.

[0012] Beneficial effects: In this solution, a positioning block is also provided, and the positioning block can move up and down. In this way, before bending the steel bar, the lifting position of the positioning block can be adjusted according to the diameter of the steel bar to press the steel bar tightly. In this way, the steel bar can be effectively limited and fixed during the bending process, preventing the steel bar from bouncing or popping out during the bending process, and effectively reducing the safety hazards during the processing.

[0013] Furthermore, the lifting drive unit includes a lead screw and a driving member. One end of the lead screw is rotatably connected to the fixed mold, the other end of the lead screw is connected to the driving member, the positioning block is threadedly connected to the lead screw, and the driving member can drive the lead screw to rotate.

[0014] Beneficial effects: In this solution, driving the lead screw to rotate by the driving member can drive the positioning block to move up and down. Its structure is simple and easy to implement.

[0015] Furthermore, the driving member is a second knob. The second knob is located outside the fixed mold and is connected to one end of the lead screw. Rotating the second knob can drive the lead screw to rotate. A plurality of circumferentially distributed second limiting grooves are formed on one side of the fixed mold facing the second knob, and a second limiting member is provided on the second knob. The second limiting member can be inserted into or disengaged from the second limiting groove.

[0016] Beneficial effects: In this solution, the driving member adopts a knob structure, so that the screw rod can be rotated by manually turning the knob, thereby causing the positioning block to move up and down. And the limiting member in this solution can limit the knob after turning the knob to lift the positioning block to a specified position, ensuring the stable state of the positioning block and preventing the knob from rotating and resetting by itself, which may affect the stable limiting effect of the positioning block on the steel bar.

[0017] Further, the driving member is a motor.

[0018] Beneficial effects: The driving member in this solution adopts a motor, and the screw rod is driven to rotate by starting the motor.

[0019] Further, one end of the bending plate is connected with a rotating shaft, one end of the rotating shaft is rotatably connected with the bottom of the moving mold, the rotation driving unit includes a transmission assembly and a power member, and the transmission assembly can transmit the power of the power member to the rotating shaft to drive the bending plate to rotate.

[0020] Beneficial effects: In this solution, the bending plate realizes the rotational cooperation with the moving mold through the rotating shaft, and the power member of the rotation driving unit is used to provide power, and the transmission assembly is used to transmit power to the bending plate, so that the bending plate rotates.

[0021] Further, there are two bending plates, the two bending plates are symmetrically arranged, the upper parts of the rotating shafts of the two bending plates are respectively connected with a driving gear and a driven gear, the driving gear meshes with the driven gear, and the transmission assembly can drive the rotating shaft of one of the bending plates to rotate.

[0022] Beneficial effects: In this solution, the two symmetrically arranged bending plates can produce an opening and closing movement state under the action of the driving gear, the driven gear and the transmission assembly, so that the opening amplitude between the two bending plates can be changed, and thus the angle between the two bending plates can be adjusted according to the actual bending position and bending angle.

[0023] Further, the power member is a motor or a first knob. When the power member is the first knob, the first knob is located outside the moving mold and is connected with the transmission assembly. Rotating the first knob can drive the transmission assembly to rotate. A plurality of circumferentially distributed first limiting grooves are formed on the side of the moving mold facing the first knob, and a first limiting member is arranged on the first knob, and the first limiting member can be inserted into or disengaged from the first limiting groove.

[0024] Beneficial effects: In this solution, the power member can be a motor or a first knob. Two methods are adopted in this solution and can be selected according to different requirements.

[0025] Further, a groove is formed at one end of the bending plate away from the moving mold.

[0026] Beneficial effects: In this solution, a groove is provided at the end of the bending plate. When bending the steel bar, the groove at the end of the bending plate can abut against the side wall of the steel bar and play a limiting role on the steel bar, enabling the bending plate to bend the steel bar more stably and not easily slipping. Description of the drawings

[0027] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, form a part of this application, and do not limit the embodiments of the present invention. In the drawings:

[0028] Figure 1 is a perspective view of a steel bar bending device of the present invention;

[0029] Figure 2 is a schematic connection and cooperation diagram between the bending plate, the moving die, and the rotational driving unit after the moving die of a steel bar bending device of the present invention is cut open;

[0030] Figure 3 is a schematic connection and cooperation diagram between the positioning block and the lifting driving unit after the fixed die of a steel bar bending device of the present invention is cut open;

[0031] Figure 4 is a partial side view of the moving die of a steel bar bending device of the present invention;

[0032] Figure 5 is a partial cross-sectional view I of the cooperation between the first knob, the worm, and the moving die of a steel bar bending device of the present invention;

[0033] Figure 6 is a cross-sectional view of the cooperation between the spline sleeve and the spline shaft of a steel bar bending device of the present invention;

[0034] Figure 7 is a partial cross-sectional view II of the cooperation between the first knob, the worm, and the moving die of a steel bar bending device of the present invention;

[0035] Figure 8 is a partial cross-sectional view III of the cooperation between the first knob, the worm, and the moving die of a steel bar bending device of the present invention.

[0036] Marks in the drawings and corresponding component names:

[0037] Push cylinder 1, moving die 2, first knob 3, bending plate 4, fixed die 5, second knob 6, worm 7, worm gear 8, driving gear 9, driven gear 10, lead screw 11, positioning block 12, limiting block 13, first limiting groove 14, spline sleeve 15, spline shaft 16. Detailed implementation manners

[0038] To make the purpose, technical solutions and advantages of the present utility model more clear and understandable, the present utility model will be further described in detail below in conjunction with embodiments and drawings. The illustrative embodiments of the present utility model and their descriptions are only used to explain the present utility model and do not limit the present utility model.

[0039] Embodiment

[0040] As Figure 1 shown, this embodiment provides a steel bar bending device, including a pushing unit and a moving die 2. The output end of the pushing unit is connected to the moving die 2. The pushing unit can drive the moving die 2 to move reciprocally, and the output end of the pushing unit is connected to the moving die 2.

[0041] At least one bending plate 4 is rotatably fitted on the moving die 2, and a rotation driving unit for driving the bending plate 4 to rotate is provided on the moving die 2.

[0042] The pushing unit includes a fixed body and an output end capable of generating telescopic movement. The pushing unit can adopt a pushing cylinder 1 or a pushing hydraulic cylinder. In this embodiment, the pushing unit is described by taking the pushing cylinder 1 as an example. In another embodiment, an installation plate is connected to the fixed body (i.e., the cylinder body) of the pushing cylinder 1. The installation plate is fixedly connected to the end of the cylinder body of the pushing cylinder 1 by welding or screw connection. The moving die 2 is located on the installation plate and can slide linearly along the installation plate.

[0043] In this embodiment, a fixed die 5 is further connected to the installation plate. The fixed die 5 is arranged opposite to the moving die 2. In this embodiment, the fixed die 5 is fixedly connected to the installation plate by screws or welding. The bending plate 4 faces the fixed die 5 and is perpendicular to the installation plate.

[0044] Combined with Figure 2 shown, one end of the bending plate 4 is connected with a rotating shaft. The bending plate 4 and the rotating shaft are integrally connected. The bottom end of the rotating shaft is rotatably connected to the bottom of the moving die 2. The rotation driving unit includes a transmission component and a power component. The transmission component can transmit the power of the power component to the rotating shaft to drive the bending plate 4 to rotate.

[0045] In this embodiment, there are two bending plates 4, and the two bending plates 4 are symmetrically arranged. As Figure 1 shown, the inside of the moving die 2 is hollow, and two symmetrical notches are opened on the moving die 2. The two bending plates 4 are respectively located in the two notches, and the two bending plates 4 can respectively rotate in the spaces of the two notches. The setting of the notches provides a rotation space for the rotation of the bending plates 4.

[0046] On the upper parts of the rotating shafts of the two bending plates 4, a driving gear 9 and a driven gear 10 are respectively connected through the cooperation of a key and a keyway. The driving gear 9 and the driven gear 10 are meshed with each other. The transmission assembly can drive the rotating shaft on one of the bending plates 4 to rotate. Since the driving gear 9 and the driven gear 10 which are meshed with each other are respectively connected to the two rotating shafts, as long as one of the rotating shafts rotates, it can drive the other rotating shaft to rotate in the opposite direction, so that the two bending plates 4 generate an opening and closing movement.

[0047] In this embodiment, the transmission assembly is a worm and worm gear mechanism. One end of the worm 7 is rotatably connected to the inner cavity side wall of the moving die 2, and the other end of the worm 7 passes through the moving die 2 and is connected to the power component. The worm gear 8 is coaxially connected to the upper part of the rotating shaft on one of the bending plates 4. The worm 7 and the worm gear 8 are meshed with each other. In this way, when the worm gear 8 rotates, it can drive the rotating shaft to rotate, so as to realize the meshing between the driving gear 9 and the driven gear 10, and further drive the opening and closing movement of the two bending plates 4, and adjust the angular position of the bending plate 4.

[0048] In another embodiment, the transmission assembly can also be a structure in which two bevel gears are meshed with each other to transmit power, that is, one of the bevel gears is coaxially connected to the upper part of the rotating shaft on one of the bending plates 4, and the other bevel gear is connected to a shaft and is rotatably connected to the moving die 2 through this shaft. The power component drives the shaft to rotate, so as to realize the meshing movement of the two bevel gears to drive the rotating shaft to rotate.

[0049] In one embodiment, the power component is a motor. The motor is located outside the moving die 2, and the output shaft of the motor is connected to the end of the worm 7, and the worm 7 is driven to rotate by the motor.

[0050] In another embodiment, the power component is a first knob 3. The first knob 3 is located outside the moving die 2, and the first knob 3 is connected to the transmission assembly. Rotating the first knob 3 can drive the transmission assembly to rotate. As Figure 4 shown, on the side of the moving die 2 facing the first knob 3, a plurality of first limiting grooves 14 evenly distributed in the circumferential direction are opened. The first knob 3 is provided with a first limiting member, and the first limiting member can be inserted into or disengaged from the first limiting groove 14. Specifically: combining Figure 5 and Figure 6 shown, the first limiting member includes a limiting block 13. One end of the limiting block 13 is adhesively fixed or fixed by other fixing methods to the first knob 3. The other end of the limiting block 13 can be inserted into the first limiting groove 14. One end of the worm 7 passing through the moving die 2 is coaxially welded with a spline sleeve 15. A spline shaft 16 is slidably fitted in the spline sleeve 15. One end of the spline shaft 16 is fixedly connected to the first knob 3. In practice, in the connection between the spline shaft 16 and the first knob 3, the end of the spline shaft 16 can be embedded in the first knob 3 to maintain a fixed connection state or other connection methods can also be used.

[0051] In this embodiment, the spline groove inside the spline sleeve 15 is not a through groove. That is, the splines on the spline shaft 16 are located in the spline groove of the spline sleeve 15 and are in sliding fit with it, but the splines on the spline shaft 16 cannot slide out of the spline sleeve 15. This plays a role in limiting the sliding position of the spline shaft 16 and can prevent the first knob 3 from falling off when the first knob 3 is slid.

[0052] Take Figure 5 the direction shown as an example for explanation. When the first knob 3 is pulled to the right, the limit block 13 can be pulled out of the first limit groove 14. At this time, the first knob 3 can be manually rotated to adjust the angle of the bending plate 4. After the adjustment is completed, the first knob 3 is pushed to the left again to insert the limit block 13 into the first limit groove 14 at the corresponding position to fix the position of the first knob 3. In this embodiment, the cooperation between the spline sleeve 15 and the spline shaft 16 enables the limit block 13 to be inserted into or separated from the first limit groove 14, and at the same time can ensure that rotating the first knob 3 can drive the normal rotation of the worm 7.

[0053] In another embodiment, as Figure 7 shown, the first knob 3 is fixedly connected to the end of the worm 7. One end of the limit block 13 is connected to the end of the first knob 3, and the other end of the limit block 13 can be inserted into the first limit groove 14. In this embodiment, the first limit groove 14 is an arc-shaped groove, and the end of the limit block 13 away from the first knob 3 is an arc end. In this embodiment, the limit block 13 is made of plastic material and has a certain plasticity. In this embodiment, when the first knob 3 is rotated, the limit block 13 can continuously deform and be stuck in and separated from the first limit groove 14. In this way of this solution, when the first knob 3 is rotated, a state of continuous engagement and separation occurs between the limit block 13 and the first limit groove 14. This has an operating feel and can realize that after adjusting the angle of the bending plate 4, the limit block 13 is immediately stuck in the first limit groove 14 for limiting, preventing the first knob 3 and the worm 7 from rotating by themselves.

[0054] In another embodiment, as Figure 8 shown, a groove is provided at one end of the first knob 3 facing the moving die 2. The limit block 13 is in sliding fit with the groove, and a spring is connected between the limit block 13 and the groove. The limit block 13 is stuck in the first limit groove 14 under the action of the spring. When the first knob 3 is rotated, when the limit block 13 slides out of the first limit groove 14 and contacts the side of the moving die 2, the spring is compressed, and when the limit block 13 is aligned with the first limit groove 14, it will be reset and stuck in the first limit groove 14 under the action of the spring. This embodiment provides another structure for restricting the position of the first knob 3, and this structure is simple and stable.

[0055] Combined with Figure 1 and Figure 3As shown in the figure, a positioning block 12 is slidably fitted on the fixed mold 5 in a direction perpendicular to the mounting plate, and a lifting drive unit for driving the positioning block 12 to move up and down is provided on the fixed mold 5. As Figure 3 shown, the lifting drive unit includes a lead screw 11 and a drive member. One end of the lead screw 11 is rotatably connected to the bottom of the fixed mold 5, the other end of the lead screw 11 is connected to the drive member, and the positioning block 12 is threadedly connected to the lead screw 11. Specifically: a strip-shaped groove is formed on one side of the fixed mold 5, one end of the fixed mold 5 passes through the strip-shaped groove and is threadedly connected to the lead screw 11, and the fixed mold 5 slides along the strip-shaped groove, and the drive member can drive the lead screw 11 to rotate.

[0056] In one embodiment, the drive member is a second knob 6. The second knob 6 is located outside the fixed mold 5, and the second knob 6 is connected to one end of the lead screw 11. Rotating the second knob 6 can drive the lead screw 11 to rotate. A plurality of circumferentially distributed second limit grooves are formed on the side of the fixed mold 5 facing the second knob 6, and a second limit member is provided on the second knob 6. The second limit member can be inserted into or disengaged from the second limit groove. The fitting connection structures between the second knob 6, the second limit member and the second limit groove, and between the second knob 6 and the lead screw 11 can adopt several fitting connection structures between the first knob 3, the first limit member and the first limit groove 14, and between the first knob 3 and the worm 7, which will not be elaborated here.

[0057] In another embodiment, the drive member is a motor. One end of the lead screw 11 extends into the top of the fixed mold 5 and is connected to the output shaft of the motor, and the motor is fixed on the top of the fixed mold 5. The motor drives the lead screw 11 to rotate, thereby driving the positioning block 12 to move up and down.

[0058] Further, in one embodiment, as Figure 1 shown, a groove is formed at the end of the bending plate 4 away from the moving mold 2. The two sides of the groove communicate with each other. Combining Figure 2 shown, the upper and lower sides of the groove are symmetrical inclined surfaces. The setting of the groove can play a certain limiting role in the steel bar during bending, and the position is more stable and accurate during bending, which can improve the bending quality of the steel bar.

[0059] Further, in one embodiment, as Figure 1 shown, a hand-held frame with a rectangular frame structure is fixedly connected to the outer side of the cylinder body of the pushing cylinder 1. The setting of the hand-held frame is convenient for manual carrying and moving.

[0060] The specific implementation process is as follows:

[0061] The worm 7 is driven to rotate by a power component, so that the worm wheel 8, the driving gear 9 and the driven gear 10 drive each other, and the two bending plates 4 are driven to perform an opening and closing movement, thereby adjusting the opening angle of the bending plates 4. Place the steel bar to be bent under the positioning block 12, and then drive the lead screw 11 to rotate through a driving component to move the positioning block 12 to the surface of the steel bar and press the steel bar tightly. By starting the pushing cylinder 1, the output end of the pushing cylinder 1 extends to push the moving die 2 towards the steel bar, so that the bending plate 4 gradually abuts against the steel bar. Continuing to push the moving die 2 can make the bending plate 4 bend the steel bar. The utility model can control the distance that the moving die 2 moves and the angle of the bending plate 4 according to actual needs to control the degree and shape of the steel bar bending.

[0062] Through the design of the fixed die 5 and the moving die 2, the utility model drives the driving gear 9 and the driven gear 10 to rotate synchronously by rotating the first knob 3 through the transmission of the worm wheel 8 and the worm 7, thereby driving the two bending plates 4 to perform an opening and closing movement, realizing the angle adjustment between them. And by rotating the second knob 6, the lead screw 11 can be rotated to drive the positioning block 12 to move up and down, so as to position steel bars of different sizes and thicknesses, prevent the steel bar from being bounced up or ejected during the bending process, effectively reducing the safety hazards during the processing. At the same time, by adjusting the angle between the two bending plates 4 and cooperating with the pushing of the pushing cylinder 1 on the moving die 2, it is convenient to perform bending processing on the steel bar at different angles, and the operation and use are more simple and flexible.

[0063] It should be noted that the above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0064] In the description of the present utility model, it should be noted that the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0065] In the description of this document, the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", etc. is based on the orientation or positional relationship shown in the drawings, and is only used to illustrate the relative positional relationship between each component or part, and does not particularly limit the specific installation orientation of each component or part.

[0066] In the description of this document, in addition to being used to indicate orientation or positional relationship, some terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0067] In the description of this document, the terms "install", "set", "provided with", "connected", "linked" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or there can be internal communication between two devices, components or parts. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0068] In the drawings of this application, the structures, proportions, sizes, etc. are only used to cooperate with the content disclosed in this technical disclosure document for those of ordinary skill in the art to understand and read, and are not used to limit the implementation conditions of this application. Therefore, they do not have technical substance. Any modification of the structure, change in the proportional relationship or adjustment of the size, without affecting the effects that this application can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in this application.

[0069] The terms used in this document are those general terms that are currently widely used in the art considering the functions of this disclosure. However, these terms can change according to the intentions of those of ordinary skill in the art, precedents, or new technologies in the art. In addition, specific terms can be selected by the applicant, and in this case, their detailed meanings will be described in the detailed description of this disclosure. Therefore, the terms used in the document should not be understood as simple names, but based on the meanings of the terms and the overall description of this disclosure.

[0070] In this document, flowcharts or text are used to illustrate the operation steps performed according to the embodiments of this application. It should be understood that the operation steps in the embodiments of this application do not necessarily need to be precisely executed in the recorded order. On the contrary, according to needs, they can be executed in reverse order or processed simultaneously. At the same time, other operations can also be added to these processes, or one or several steps of operations can be removed from these processes.

[0071] The above are only the preferred embodiments of this application and are not used to limit this application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A steel bar bending device, characterized in that: It includes a pushing unit and a movable mold, wherein the output end of the pushing unit is connected to the movable mold, and the pushing unit can drive the movable mold to move back and forth; At least one bending plate is rotatably matched on the movable mold, and a rotation driving unit for driving the bending plate to rotate is provided on the movable mold.

2. A steel bar bending device according to claim 1, characterized in that: The pushing unit includes a fixed body and an output end capable of generating telescopic motion. A mounting plate is connected to the fixed body of the pushing unit. The movable mold is located on the mounting plate and can slide linearly along the mounting plate. A fixed mold is also connected to the mounting plate. The fixed mold is arranged opposite to the movable mold. The bending plate is arranged facing the fixed mold, and the bending plate is perpendicular to the mounting plate.

3. A steel bar bending device according to claim 2, characterized in that: The fixed mold is provided with a positioning block which is slidably matched along a direction perpendicular to the mounting plate, and the fixed mold is provided with a lifting driving unit for driving the positioning block to move up and down.

4. A steel bar bending device according to claim 3, characterized in that: The lifting drive unit includes a screw and a drive member, one end of the screw is rotatably connected to the fixed mold, the other end of the screw is connected to the drive member, the positioning block is threadedly connected to the screw, and the drive member can drive the screw to rotate.

5. A steel bar bending device according to claim 4, characterized in that: The driving member is a second knob, which is located on the outside of the fixed mold and is connected to one end of the screw rod. Rotating the second knob can drive the screw rod to rotate. A plurality of circumferentially distributed second limiting grooves are provided on a side of the fixed mold facing the second knob. A second limiting piece is provided on the second knob, and the second limiting piece can be inserted into or out of the second limiting groove.

6. A steel bar bending device according to claim 4, characterized in that: The driving member is a motor.

7. A steel bar bending device according to any one of claims 2 to 6, characterized in that: One end of the bending plate is connected to a rotating shaft, one end of the rotating shaft is rotatably connected to the bottom of the movable mold, and the rotation drive unit includes a transmission assembly and a power member, and the transmission assembly can transmit the power of the power member to the rotating shaft to drive the bending plate to rotate.

8. A steel bar bending device according to claim 7, characterized in that: There are two bending plates, which are symmetrically arranged. The upper parts of the rotating shafts of the two bending plates are respectively connected with a driving gear and a driven gear. The driving gear and the driven gear are meshed with each other, and the transmission assembly can drive the rotating shaft on one of the bending plates to rotate.

9. A steel bar bending device according to claim 7, characterized in that: The power piece is a motor or a first knob. When the power piece is the first knob, the first knob is located outside the movable mold, and the first knob is connected to the transmission assembly. Rotating the first knob can drive the transmission assembly to rotate. A plurality of circumferentially distributed first limiting grooves are provided on a side of the movable mold facing the first knob. A first limiting member is provided on the first knob, and the first limiting member can be inserted into or out of the first limiting groove.

10. A steel bar bending device according to claim 1, characterized in that: A groove is formed at one end of the bending plate away from the movable mold.

Images