Steel bar bending machine

Abstract

The present invention discloses a steel bar hoop bending machine, comprising a bending mechanism, a stacking mechanism and a control mechanism. The bending mechanism comprises a turntable, a first driving device and a positioning assembly. The turntable is provided with a center pin and an eccentric pin, which cooperate with each other and position the steel bar through the positioning assembly. The stacking mechanism comprises a top plate and a second driving device, and the second driving device drives the top plate to move in a direction perpendicular to the working surface of the turntable. When stacking is required, the control mechanism controls the first driving device and the second driving device to cooperate to perform the stacking operation, and the second driving device drives the top plate to push the steel bar in a direction perpendicular to the turntable, so that the steel bar is tilted at a certain inclination angle, which is convenient for displacing and stacking the two ends of the steel bar, thereby realizing automatic stacking without manual operation, greatly reducing the labor intensity of workers, saving time and effort, effectively improving production efficiency, and improving operational safety.

Description

Technical Field

[0001] The invention relates to the technical field of steel bar processing equipment, and in particular to a steel bar hoop bending machine. Background Art

[0002] Stirrups are common building materials in the construction industry, and usually a stirrup bending machine is used to bend the steel bars to form stirrups. For example, the invention patent proposed by the applicant has a publication number of CN209792473U, and the patent name is a linkage-shifted bidirectional steel bar stirrup bending machine. The linkage-shifted bidirectional steel bar stirrup bending machine can be used to bend the steel bars into square stirrups. In the steel bar bending process, in order to allow the two end angles to overlap together to form a rectangular frame, the two ends of the steel bar need to be misaligned in the final bending step to facilitate stacking. The specific operation is that when the stirrup bending machine bends the last corner of the steel bar, the other end of the steel bar is manually bent up to a certain inclination angle, so that the two ends of the steel bar can overlap together when the last corner is completed to achieve stacking. This stirrup bending machine requires accurate control of the bending angle, and requires high physical strength and experience of the operator. It has high labor intensity, low work efficiency, and potential safety hazards. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a steel bar bending machine, which can realize automatic bending without manual operation and stack the steel bars at both ends, and has a practical and reliable structure.

[0004] A steel bar hoop bending machine according to an embodiment of the present invention comprises:

[0005] A bending mechanism, the bending mechanism comprising a rotating disk, a first driving device and a positioning assembly, the rotating disk is provided with a center pin and an eccentric pin, the center pin and the eccentric pin cooperate with each other and position the steel bar through the positioning assembly, so as to bend the steel bar when the first driving device drives the rotating disk to rotate;

[0006] A stacking mechanism, the stacking mechanism comprising a top plate and a second driving device, the second driving device driving the top plate to move in a direction perpendicular to the working surface of the turntable to push the steel bars to tilt so that the two ends of the steel bars can be staggered and stacked; and

[0007] The control mechanism is used to control the first driving device to cooperate with the second driving device to complete the stacking operation.

[0008] The steel bar hoop bending machine according to the embodiment of the present invention has at least the following technical effects: the center pin and the eccentric pin on the turntable are used to clamp the steel bar and the positioning assembly is used to position the steel bar, and the turntable is driven to rotate by the first drive device to bend the steel bar to form an angle, so that the steel bar is bent into multiple angles by the bending mechanism; when stacking is required, the first drive device and the second drive device are controlled by the control mechanism to cooperate in the stacking operation, so that the first drive device can clamp the steel bar through the center pin and the eccentric pin when working, so as to play a positioning role, and the top plate is driven by the second drive device to push the steel bar in a direction perpendicular to the turntable, so that the steel bar is tilted at a certain inclination angle, which is convenient for displacing and overlapping the two ends of the steel bar, thereby realizing automatic stacking without manual operation, greatly reducing the labor intensity of workers, saving time and effort, effectively improving production efficiency, and improving operational safety.

[0009] According to some embodiments of the present invention, the first driving device includes a first hydraulic cylinder, the second driving device includes a second hydraulic cylinder, and the control mechanism includes:

[0010] A reversing valve, used for switching the hydraulic oil circuit, the reversing valve is connected to the first hydraulic cylinder through a first oil pipe, connected to the second hydraulic cylinder through a second oil pipe, and unloads oil through a third oil pipe;

[0011] The linkage mechanism is used to trigger the reversing valve to switch the oil path from where the hydraulic oil flows through the first oil pipe and the third oil pipe to where the hydraulic oil flows through the first oil pipe and the second oil pipe.

[0012] According to some embodiments of the present invention, the reversing valve includes a valve body and a valve core, the valve body is provided with an oil inlet connected to the first oil pipe, an oil outlet connected to the second oil pipe, and an oil unloading port connected to the third oil pipe, the valve core can be telescopically moved along the inner cavity of the valve body to switch the connection between the oil inlet, the oil outlet and the oil unloading port, and one end of the valve core extends to the outside of the valve body to form a trigger end.

[0013] According to some embodiments of the present invention, the linkage mechanism includes a driving member, a rotating shaft and a travel rod, the rotating shaft is provided with a first swing arm and a second swing arm, the driving member drives the rotating shaft to rotate so that the first swing arm swings to a position corresponding to the travel rod and the second swing arm swings to a position corresponding to the reversing valve; the travel rod is connected to the first driving device so that when the first driving device drives the turntable to rotate, the travel rod can move and push the first swing arm to swing, so that the second swing arm triggers the reversing valve.

[0014] According to some embodiments of the present invention, the second swing arm is provided with a first return spring for returning the second swing arm.

[0015] According to some embodiments of the present invention, the driving member includes a pedal and a connecting rod, one end of the connecting rod is hinged to the pedal, and the other end of the connecting rod is hinged to the rotating shaft.

[0016] According to some embodiments of the present invention, the second driving device further comprises a push rod, one end of which is connected to the driving rod of the second hydraulic cylinder, and the other end of which is connected to the top plate.

[0017] According to some embodiments of the present invention, the second driving device further comprises a second return spring, and the second return spring is connected to the push rod so as to enable the push rod to return to its original position.

[0018] According to some embodiments of the present invention, a guide wheel set for guiding the moving path of the push rod is provided on the outer side of the push rod.

[0019] According to some embodiments of the present invention, the positioning assembly includes a baffle and a third driving device, and the third driving device drives the baffle to swing to cooperate with the center pin and the eccentric pin to bend the steel bar.

[0020] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent from the description, or may be understood by practicing the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0022] Figure 1 It is a schematic diagram of the overall structure of a steel bar hoop bending machine according to an embodiment of the present invention;

[0023] Figure 2 It is a structural schematic diagram of a steel bar bending state of a steel bar bending machine according to an embodiment of the present invention;

[0024] Figure 3 It is a structural schematic diagram of a steel bar lifting state in a steel bar hoop bending machine according to an embodiment of the present invention;

[0025] Figure 4 It is a structural schematic diagram of a steel bar hoop bending machine in an embodiment of the present invention in a state where stacking of materials is completed;

[0026] Figure 5 is a structural schematic diagram of a stacking mechanism according to an embodiment of the present invention;

[0027] Figure 6 yes Figure 5 A cross-sectional schematic diagram of the stacking mechanism in the AA direction in a standby state;

[0028] Figure 7 yes Figure 5A cross-sectional schematic diagram of the stacking mechanism in the AA direction in the jacking state;

[0029] Figure 8 is a structural schematic diagram of a hydraulic oil circuit control device according to an embodiment of the present invention;

[0030] Fig. 9 is a schematic diagram of the connection structure of the hydraulic oil circuit according to one embodiment of the present invention;

[0031] Fig.10 is a schematic cross-sectional structural diagram of a reversing valve in a standby state according to an embodiment of the present invention;

[0032] Fig.11 is another cross-sectional structural schematic diagram of a reversing valve in a standby state according to an embodiment of the present invention;

[0033] Fig.12 is a schematic cross-sectional structural diagram of a reversing valve in a triggering state according to an embodiment of the present invention;

[0034] Fig.13 It is a schematic diagram of the connection structure between the first hydraulic cylinder and the travel bracket according to an embodiment of the present invention;

[0035] Fig.14 is a structural schematic diagram of a linkage mechanism according to an embodiment of the present invention;

[0036] Fig.15 is a structural schematic diagram of a linkage mechanism in a standby state according to an embodiment of the present invention;

[0037] Fig.16 is a structural schematic diagram of a linkage mechanism in a triggering state according to an embodiment of the present invention;

[0038] Fig.17 It is a structural schematic diagram of the state of the reversing valve triggered by the linkage mechanism according to an embodiment of the present invention.

[0039] Reference numerals:

[0040] Steel bar bending machine 10;

[0041] Steel bar 20;

[0042] Bending mechanism 100, turntable 110, center pin 111, eccentric pin 112, first hydraulic cylinder 120, travel bracket 121, reverse stop pin plate 130, forward stop pin plate 140, second foot pedal 150;

[0043] The stacking mechanism 200, the top plate 210, the second hydraulic cylinder 220, the second driving rod 221, the top rod 230, the top needle 231, the sleeve rod 232, the second return spring 240, the guide wheel group 250, the guide rod 260, and the guide seat 270;

[0044] Frame 300, work surface 310;

[0045] Reversing valve 400, valve body 410, oil inlet 411, oil outlet 412, oil discharge port 413, valve core 420, trigger end 421;

[0046] Linkage mechanism 500, rotating shaft 510, first swing arm 511, second swing arm 512, third swing arm 513, first touch wheel 514, second touch wheel 515, first return spring 516, limit screw 517, travel rod 520, first pedal 530, connecting rod 540, second connecting rod 550. DETAILED DESCRIPTION

[0047] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0048] In the description of the present invention, if there is a description of first, second, third, etc., it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the sequence of the indicated technical features.

[0049] In the description of the present invention, it should be understood that descriptions involving orientation, such as orientation or positional relationship indicated as up, down, etc., are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0050] In the description of the present invention, it should be noted that, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

[0051] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described below are only some embodiments of the present invention, not all embodiments.

[0052] refer to Figures 1 to 17 A reinforcing steel bar hoop bending machine 10 according to an embodiment of the present invention will be described.

[0053] See also Figure 1 and 2As shown, the steel bar hoop bending machine 10 of the embodiment of the present invention includes a bending mechanism 100 and a stacking mechanism 200. The bending mechanism 100 is used to bend the steel bar 20 to form a bend angle. The steel bar 20 can be bent into multiple bend angles by the bending mechanism 100, so that the steel bar 20 is bent into a square hoop. The stacking mechanism 200 is used to bend one end of the steel bar 20 into an inclined shape, so that the two ends of the steel bar 20 can be staggered for stacking.

[0054] Specifically, Figure 1 As shown, the bending mechanism 100 includes a turntable 110, a first driving device and a positioning assembly. The turntable 110 is provided with a center pin 111 and an eccentric pin 112. The center pin 111 is located at the center axis position of the turntable 110, and the eccentric pin 112 is located at a position on the turntable 110 away from the center axis. The center pin 111 and the eccentric pin 112 are separated by a certain distance. It can be understood that the steel bar 20 is placed between the center pin 111 and the eccentric pin 112. When the turntable 110 rotates, the positioning assembly is used to position the steel bar 20. The center pin 111 cooperates with the eccentric pin 112 to clamp and bend the steel bar 20, so as to achieve bending the steel bar 20 to form a curved angle.

[0055] Among them, the bending mechanism 100 can bend the steel bar 20 in the forward or reverse direction, the positioning component can cooperate to position the steel bar 20 during forward and reverse bending, the first driving device is driven by the first hydraulic cylinder 120, and the bending mechanism 100 in this embodiment can refer to the invention patent with announcement number CN209792473U and patent name "Linked Variable Position Bidirectional Steel Bar Bending Machine 10". The specific structure and working principle refer to the contents disclosed in the above-mentioned invention patent, which will not be repeated here.

[0056] See also Figure 1 As shown, the stacking mechanism 200 includes a top plate 210 and a second driving device, and the bending mechanism 100 and the stacking mechanism 200 are both mounted on a frame 300, wherein the turntable 110 and the positioning assembly are located on a working table 310 of the frame 300, and the second driving device drives the top plate 210 to move in a direction perpendicular to the turntable 110, that is, the top plate 210 can be pushed up in a direction perpendicular to the working table 310. When the stacking mechanism 200 is in a standby state, the top plate 210 is located on the working table 310 and does not extend out of the working table 310; when the stacking mechanism 200 is working, the second driving device drives the top plate 210 to extend upward, thereby pushing up the steel bars 20 located on the working table 310.

[0057] See also Figure 2As shown, it can be understood that the bending mechanism 100 is separated from the stacking mechanism 200 by a certain distance, and the bending mechanism 100 performs an angle bending operation on one end of the steel bar 20. When the bending mechanism 100 clamps the steel bar 20, it plays a positioning role on the steel bar 20, so that one end of the steel bar 20 can be fixed at the position of the turntable 110; the other end of the steel bar 20 is just located above the top plate 210. Therefore, Figure 3 As shown, when the top plate 210 lifts the steel bar 20, the steel bar 20 can be tilted upward, so that the two ends of the steel bar 20 are misaligned. In this way, when the bending mechanism 100 completes the last bend, the two ends of the steel bar 20 can just overlap together, thereby realizing automatic stacking. Figure 4 The top plate 210 can accurately lift the steel bar 20 so that the two ends of the steel bar 20 can overlap closely without manual bending of the steel bar 20, which greatly reduces the labor intensity of workers, saves time and effort, effectively improves production efficiency, and ensures safety.

[0058] See also Figure 5 As shown, in some embodiments, the second driving device includes a push rod 230 and a second hydraulic cylinder 220, wherein a second driving rod 221 driven by hydraulic pressure is provided in the second hydraulic cylinder 220, the lower end of the push rod 230 is connected to the second driving rod 221, and the upper end of the push rod 230 is connected to the top plate 210. Specifically, the second hydraulic cylinder 220 is fixed on the frame 300 and is located below the work surface 310, and a through hole for the push rod 230 to pass through is provided on the work surface 310, and the bottom of the second hydraulic cylinder 220 is connected to the oil supply pipe. When working, the second hydraulic cylinder 220 pushes the push rod 230 to extend upward through the second driving rod 221, and the top plate 210 is pushed upward through the push rod 230, thereby pushing the steel bar 20 to tilt upward. The hydraulic cylinder is used as the driving power, which has a high driving strength, can quickly push the steel bar 20 to tilt upward, and has a stable and reliable structure.

[0059] See also Figure 6 and 7 As shown, in this embodiment, the ejector rod 230 includes a sleeve rod 232 and an ejector pin 231. The sleeve rod 232 is sleeved on the outside of the ejector pin 231. The lower end of the sleeve rod 232 is connected to the second driving rod 221. The top end of the ejector pin 231 extends out of the upper end of the sleeve rod 232 and is connected to the bottom of the ejector plate 210. A guide wheel group 250 is arranged on the outside of the sleeve rod 232. Specifically, the guide wheel group 250 includes a left guide wheel and a right guide wheel. The left guide wheel and the right guide wheel are installed on the bottom surface of the work table 310 and correspond to the through hole. The sleeve rod 232 passes through the gap between the left guide wheel and the right guide wheel. Under the guidance of the guide wheel group 250, the sleeve rod 232 can pass smoothly. On the one hand, it can reduce the friction between the sleeve rod 232 and the through hole, and on the other hand, it can play a positioning role.

[0060] See also Figure 5 As shown, in order to further improve the stability of the movement of the top plate 210, a guide rod 260 is provided at the bottom of the top plate 210, and a guide seat 270 matching the guide rod 260 is provided on the bottom surface of the work surface 310. When the top rod 230 pushes the top plate 210 upward to move, the guide rod 260 can slide along the guide seat 270 to play a positioning and guiding role. For example, a guide groove can be provided on the guide seat 270, and the guide rod 260 can move along the guide groove, so that the top plate 210 can stably move in the vertical direction to prevent the top plate 210 from deflecting.

[0061] See also Figures 1 to 4 As shown, in some embodiments, a second return spring 240 is arranged on the outside of the push rod 230, the upper end of the second return spring 240 is connected to the push rod 230, and the lower end of the second return spring 240 is connected to the frame 300, and the push rod 230 can be reset to its original position by the elastic force of the second return spring 240. Specifically, two second return springs 240 are connected to the outside of the sleeve rod 232, and when the second driving rod 221 drives the ejector pin 231 to move upward, the sleeve rod 232 moves with the ejector pin 231 and stretches the second return spring 240, so that the second return spring 240 generates a downward force, and after the steel bars 20 are stacked, the second hydraulic cylinder 220 unloads the oil, and under the elastic force of the second return spring 240, the sleeve rod 232 moves downward for rapid reset, so that the top plate 210 is also reset, and the structure is simple and practical, and no manual operation is required.

[0062] In some embodiments, the positioning assembly includes a baffle and a third driving device, the third driving device drives the baffle to swing to cooperate with the center pin 111 and the eccentric pin 112 to bend the steel bar 20, wherein the baffle includes a reverse baffle plate 130 and a forward baffle plate 140. Specifically, the positioning assembly can refer to the linkage displacement baffle plate disclosed in the invention patent with announcement number CN209792473U, which will not be described in detail here.

[0063] Reference below Figures 8 to 17 As shown, a hydraulic oil circuit control device according to an embodiment of the present invention is described, which is applicable to the steel bar hoop bending machine 10 according to an embodiment of the present invention.

[0064] See also Figure 8 As shown, the hydraulic oil circuit control device of the embodiment of the present invention includes a reversing valve 400 and a linkage mechanism 500. The reversing valve 400 is connected to the first hydraulic cylinder 120 through a first oil pipe, connected to the second hydraulic cylinder 220 through a second oil pipe, and unloads oil through a third oil pipe. The reversing valve 400 is used to switch the direction of the oil circuit, and the linkage mechanism 500 is used to trigger the reversing valve 400 so that the reversing valve 400 can switch the oil circuit.

[0065] See also Fig. 9As shown, specifically, the first oil pipe is connected to the oil outlet of the first hydraulic cylinder 120, and the oil inlet of the first hydraulic cylinder 120 is connected to the oil pump, and the oil pump is used to provide hydraulic oil. The structure of the oil pump is not shown in the figure. The second oil pipe is connected to the oil inlet of the second hydraulic cylinder 220, and the third oil pipe is connected to the oil tank, so that the hydraulic oil of the first hydraulic cylinder 120 and the second hydraulic cylinder 220 can be unloaded back to the oil tank. When the bending mechanism 100 is working normally, the reversing valve 400 controls the first oil pipe and the third oil pipe to be connected, that is, the hydraulic oil of the first hydraulic cylinder 120 can flow back to the oil tank through the first oil pipe and the third oil pipe in turn for unloading. At this time, the second hydraulic cylinder 220 is not working, and the stacking mechanism 200 and the linkage mechanism 500 are both in standby state. When the stacking mechanism 200 needs to start working, the reversing valve 400 is triggered by the linkage mechanism 500, and the oil path of the hydraulic oil flowing through the first oil pipe and the third oil pipe is switched to the oil path through the first oil pipe and the second oil pipe, that is, the hydraulic oil is delivered to the second hydraulic cylinder 220, so that the second hydraulic cylinder 220 starts working. The structures of the first oil pipe, the second oil pipe and the third oil pipe are not shown in the drawings.

[0066] It should be noted that since the bending mechanism 100 needs to cooperate in positioning the steel bars 20 when the stacking mechanism 200 is working, when the second hydraulic cylinder 220 starts working, the first hydraulic cylinder 120 is still in a working state. At this time, the oil pump continues to supply oil to the first hydraulic cylinder 120, so that the first hydraulic cylinder 120 and the second hydraulic cylinder 220 can cooperate in operation.

[0067] When the bending mechanism 100 is working, the steel bar 20 is bent into multiple angles through the bending mechanism 100; when bending the last angle, the reversing valve 400 is triggered by the linkage mechanism 500, and the oil circuit is switched to start the stacking mechanism 200 to start working, and the top plate 210 is driven by the second hydraulic cylinder 220 to lift the steel bar 20, so that the steel bar 20 is tilted at a certain tilt angle and accurately positioned; then the steel bar 20 is bent through the bending mechanism 100 to complete the last angle, so that the two ends of the steel bar 20 can be staggered and overlapped together, thereby realizing automatic stacking, and no manual operation is required to stack the steel bars 20, which greatly reduces the labor intensity of workers, saves time and effort, effectively improves production efficiency, and improves operational safety.

[0068] See also Figures 10 to 12 As shown, in some embodiments, the reversing valve 400 includes a valve body 410 and a valve core 420, the valve core 420 is telescopically arranged in the inner cavity of the valve body 410, and the valve body 410 is provided with an oil inlet 411, an oil outlet 412 and an oil unloading port 413, and the oil inlet 411, the oil outlet 412 and the oil unloading port 413 are all connected to the inner cavity. Among them, the oil inlet 411 is connected to the first oil pipe, the oil outlet 412 is connected to the second oil pipe, and the oil unloading port 413 is connected to the third oil pipe. It can be understood that, as Fig.10 and 11The valve core 420 is shown in the standby state. At this time, the oil inlet 411 is connected to the oil discharge port 413, the oil outlet 412 is closed, and the hydraulic oil of the first hydraulic cylinder 120 enters the inner cavity of the valve body 410 through the first oil pipe, and is discharged to the third oil pipe through the oil discharge port 413, and then flows back to the oil tank. Fig.12 As shown, the valve core 420 is in a triggered state, at which time the oil inlet 411 is connected to the oil outlet 412, the oil unloading port 413 is closed, and the hydraulic oil of the first hydraulic cylinder 120 enters the inner cavity of the valve body 410 through the first oil pipe, and is discharged to the second oil pipe through the oil outlet 412, and the hydraulic oil is transported to the second hydraulic cylinder 220 through the second oil pipe, so that the second hydraulic cylinder 220 starts to work.

[0069] The valve core 420 can be telescopically moved along the inner cavity of the valve body 410, and the movement of the valve core 420 controls the communication between the oil inlet 411 and the oil outlet 412 and the oil discharge port 413. One end of the valve core 420 extends to the outside of the valve body 410 to form a trigger end 421. When the linkage mechanism 500 touches the trigger end 421, it can push the valve core 420 to move to change its position, thereby achieving the purpose of controlling the switching of the oil circuit. Fig.12 As shown, when the linkage mechanism 500 touches the trigger end 421, the valve core 420 shrinks toward the inner cavity, switching the state where the oil inlet 411 is connected to the oil discharge port 413 to the state where the oil inlet 411 is connected to the oil outlet 412, thereby changing the direction of the oil circuit, the oil circuit switching efficiency is high, and the structure is practical and reliable. It can be understood that a second reset spring (not shown in the drawings) for resetting is provided in the valve body 410, so that the valve core 420 can be reset after the linkage mechanism 500 is away from the trigger end 421.

[0070] See also Figures 14 to 17 As shown, in some embodiments, the linkage mechanism 500 includes a driving member, a rotating shaft 510 and a travel rod 520, wherein the rotating shaft 510 is rotatably mounted on the frame 300, the driving member is connected to the rotating shaft 510, and the rotating shaft 510 can be driven to rotate by the driving member, and the travel rod 520 is connected to the first driving device.

[0071] See also Fig.14As shown, specifically, the rotating shaft 510 is provided with a first swing arm 511, a second swing arm 512 and a third swing arm 513, and the first swing arm 511, the second swing arm 512 and the third swing arm 513 all extend radially along the axis of the rotating shaft 510, wherein the first swing arm 511 is provided with a first touch wheel 514, and the second swing arm 512 is provided with a second touch wheel 515, and the first swing arm 511 and the second swing arm 512 are located on both sides of the rotating shaft 510 symmetrically, roughly forming a lever structure, the driving member is connected to the third swing arm 513, and the travel rod 520 is connected to the first driving device. It can be understood that only when the first driving device drives the turntable 110 to rotate to the appropriate position can the center pin 111 and the eccentric pin 112 cooperate to clamp the steel bar 20 for positioning. Therefore, it is necessary to control the first driving device and the second driving device through the linkage mechanism 500 to cooperate in the stacking operation. It should be noted that, Fig.13 As shown, a stroke bracket 121 is provided on the first hydraulic cylinder 120, and a first driving rod is provided on the first hydraulic cylinder 120. The stroke bracket 121 is connected to the first driving rod, and the turntable 110 is driven to rotate through the stroke bracket 121. The stroke rod 520 is connected to the stroke bracket 121, so that the stroke rod 520 can move with the stroke bracket 121. The specific connection structure and working principle of the stroke bracket 121 and the first hydraulic cylinder 120 can refer to the stroke bracket 121 and the power component disclosed in the invention patent with announcement number CN209792473U, which will not be described in detail here.

[0072] In this embodiment, the linkage mechanism 500 has two states, including a standby state and a trigger state. Fig.15 As shown, in the standby state, the driving member does not work, the rotating shaft 510 does not rotate, the first touch wheel 514 is separated from the travel rod 520 by a certain distance, so that the travel rod 520 will not contact the first touch wheel 514 during the movement, and the second touch wheel 515 will not contact the trigger end 421 of the reversing valve 400.

[0073] like Fig.16 As shown, the trigger state is that when the bending mechanism 100 starts to bend the steel bar 20 at the last bend angle, the linkage mechanism 500 is started, and the rotating shaft 510 is driven to rotate by the driving member. The rotating shaft 510 rotates to make the first swing arm 511 and the second swing arm 512 swing, so that the first touch wheel 514 moves to the moving path position of the travel rod 520, and at the same time, the second touch wheel 515 moves to the position close to the trigger end 421; Fig.17 As shown, when the travel rod 520 moves to the position of the first touch wheel 514, the travel rod 520 pushes the first touch wheel 514 upward, and the first swing arm 511 swings upward, while the second swing arm 512 swings downward, so that the second touch wheel 515 moves downward and touches the trigger end 421, thereby triggering the reversing valve 400 to switch the oil circuit.

[0074] It can be understood that the travel rod 520 moves with the movement of the travel bracket 121, and the movement stroke of the travel rod 520 can be set to cooperate with the rotation angle of the turntable 110, so that when the travel rod 520 moves to the position of lifting the first touch wheel 514, the turntable 110 rotates to a certain angle so that the center pin 111 and the eccentric pin 112 can clamp the steel bar 20. At this time, the reversing valve 400 switches the oil circuit and supplies oil to the second hydraulic cylinder 220, so that the second hydraulic cylinder 220 starts to work, realizing precise control of the steel bar bending machine 10, so that the bending mechanism 100 and the stacking mechanism 200 can better cooperate to complete the stacking operation, and the operation is efficient and fast, which effectively improves production efficiency.

[0075] In order to reset the second swing arm 512, a first reset spring 516 is provided on the second swing arm 512. The first reset spring 516 is located above the second touch wheel 515. The lower end of the first reset spring 516 is connected to the second swing arm 512, and the upper end of the first reset spring 516 is connected to the bracket. When the second swing arm 512 swings downward, the second touch wheel 515 presses the trigger end 421, and the first reset spring 516 generates an upward elastic force. After the stacking is completed, the travel rod 520 moves away from the first touch wheel 514, and under the action of the first reset spring 516, the second swing arm 512 is reset, so that the first swing arm 511 is also reset, and the linkage mechanism 500 is restored to the standby state.

[0076] See also Fig.15 As shown, a limit screw 517 is provided on the second swing arm 512, and the limit screw 517 is located on the upper side of the second swing arm 512. It can be understood that the lower end of the limit screw 517 is connected to the second swing arm 512, and the upper end of the limit screw 517 is a free end and corresponds to the frame 300. When the second swing arm 512 rotates counterclockwise around the rotating shaft 510, the second swing arm 512 is limited to a certain rotation angle by the limit screw 517 to prevent the second swing arm 512 from deviating from the working area.

[0077] See also Figure 8As shown, in some embodiments, the driving member used includes a first pedal 530 and a connecting rod 540, one end of the connecting rod 540 is hinged to the first pedal 530, and the other end is hinged to the third swing arm 513. The connecting rod 540 is moved downward by operating the first pedal 530, and the connecting rod 540 drives the rotating shaft 510 to rotate, so that the linkage mechanism 500 enters a trigger state, and the operation is simple and safe. In the embodiment, the driving member also includes a second connecting rod 550, and the first pedal 530 is connected to the oil pump through the second connecting rod 550. Specifically, a switch valve is provided on the oil pump to control the opening or closing of the oil supply of the oil pump. It can be understood that when the switch valve is opened, the oil pump delivers hydraulic oil to the first hydraulic cylinder 120, so that the first hydraulic cylinder 120 starts to work. When the switch valve is closed, the first hydraulic cylinder 120 stops working, and the hydraulic oil flows back to the oil tank through the return oil pipe. During the stacking process, the linkage mechanism 500 enters the standby state by operating the first pedal 530, and at the same time, the second connecting rod 550 triggers the switch valve of the oil pump to start supplying oil, the first hydraulic cylinder 120 starts working and drives the turntable 110 to bend the steel bar 20, and then the bending operation is completed in sequence. Figures 15 to 17 The operation flow of the embodiment shown in the figure can complete the automatic stacking operation, and the operation is simple and quick.

[0078] It should be noted that, in the embodiment, the bending mechanism 100 is activated by operating the second pedal 150. For details, see the pedal structure disclosed in the invention patent with announcement number CN209792473U. The first pedal 530 of the linkage mechanism 500 and the second pedal 150 of the bending mechanism 100 are independently arranged, and the two do not interfere with each other, and the operation is simple.

[0079] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A steel bar bending machine, characterized in that: include: A bending mechanism, the bending mechanism comprising a rotating disk, a first driving device and a positioning assembly, the rotating disk is provided with a center pin and an eccentric pin, the center pin and the eccentric pin cooperate with each other and position the steel bar through the positioning assembly, so as to bend the steel bar when the first driving device drives the rotating disk to rotate; A stacking mechanism, the stacking mechanism comprising a top plate and a second driving device, the second driving device driving the top plate to move in a direction perpendicular to the working surface of the turntable to push the steel bars to tilt so that the two ends of the steel bars can be staggered and stacked; and, A control mechanism, used for controlling the first driving device to cooperate with the second driving device to complete the stacking operation; The first driving device comprises a first hydraulic cylinder, the second driving device comprises a second hydraulic cylinder, the control mechanism comprises a reversing valve and a linkage mechanism, the reversing valve is used to switch the hydraulic oil circuit, the reversing valve is connected to the first hydraulic cylinder through a first oil pipe, connected to the second hydraulic cylinder through a second oil pipe, and unloads oil through a third oil pipe; the linkage mechanism is used to trigger the reversing valve to switch the oil circuit in which the hydraulic oil flows through the first oil pipe and the third oil pipe to the oil circuit through the first oil pipe and the second oil pipe; the linkage mechanism comprises a driving member, a rotating shaft and a stroke rod, the rotating shaft is provided with a first swing arm and a second swing arm, the driving member drives the rotating shaft to rotate, so that the first swing arm swings to a position corresponding to the stroke rod and the second swing arm swings to a position corresponding to the reversing valve; the stroke rod is connected to the first driving device, so that when the first driving device drives the turntable to rotate, the stroke rod can move and push the first swing arm to swing, so that the second swing arm triggers the reversing valve; The second driving device also includes a push rod, one end of which is connected to the driving rod of the second hydraulic cylinder, and the other end is connected to the push plate. The second driving device also includes a second return spring, which is connected to the push rod so that the push rod can be reset. A guide wheel group is provided on the outer side of the push rod for guiding the moving path of the push rod.

2. The steel bar bending machine according to claim 1, characterized in that: The reversing valve includes a valve body and a valve core, the valve body is provided with an oil inlet connected to the first oil pipe, an oil outlet connected to the second oil pipe, and an oil unloading port connected to the third oil pipe, the valve core can be telescopically moved along the inner cavity of the valve body to switch the connection between the oil inlet and the oil outlet and the oil unloading port, and one end of the valve core extends to the outside of the valve body to form a trigger end.

3. The steel bar bending machine according to claim 1, characterized in that: The second swing arm is provided with a first return spring for returning the second swing arm.

4. The steel bar bending machine according to claim 1, characterized in that: The driving member comprises a pedal and a connecting rod, one end of the connecting rod is hinged to the pedal, and the other end of the connecting rod is hinged to the rotating shaft.

5. The steel bar bending machine according to claim 1, characterized in that: The positioning assembly includes a baffle and a third driving device, and the third driving device drives the baffle to swing to cooperate with the center pin and the eccentric pin to bend the steel bar.

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