Rebar bending machine control device

Abstract

The present invention discloses a control device for a steel bar hoop bending machine, comprising a reversing valve and a linkage mechanism. When the steel bar hoop bending machine needs to perform a stacking operation, a driving member is used to drive the rotating shaft to rotate. When the rotating shaft rotates, the first swing arm and the second swing arm are driven to swing simultaneously, so that the first swing arm can swing to a position corresponding to a travel rod, and at the same time, the second swing arm swings to a position corresponding to the reversing valve. When the travel rod moves to the position of the first swing arm, it can push the first swing arm to swing, so that the rotating shaft rotates, thereby driving the second swing arm to swing and triggering the reversing valve. In this way, the reversing valve is triggered at an appropriate operating node through the linkage mechanism, and the hydraulic oil circuit is switched through the reversing valve, so that the two hydraulic cylinders can be controlled to cooperate to complete the stacking work, thereby effectively solving the problem of stacking of the hoop bending machine. The present invention is suitable for the steel bar hoop bending machine, does not require manual operation to stack materials, and has a practical and reliable structure.

Description

Technical Field

[0001] The invention relates to the technical field of steel bar processing equipment, and in particular to a control device for 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 variable bidirectional steel bar bending machine. The linkage variable bidirectional steel bar bending machine can be used to bend the steel bars to form stirrups. In the process of bending the steel bars, in order to enable the two end angles to overlap together to form a rectangular frame, the two ends of the steel bars need to be dislocated in the last bending step to facilitate stacking. The specific operation is that the stirrup bending machine bends the steel bars to form multiple angles so that the steel bars can be bent to form a frame. When the stirrup bending machine bends the last angle of the steel bars, the other end of the steel bars is manually bent up to a certain tilt angle, so that the two ends of the steel bars can overlap together when the last angle is completed to achieve stacking. However, manual operation is time-consuming and labor-intensive, and requires high physical strength and experience from the operator, with high labor intensity, low work efficiency, and potential safety hazards.

[0003] Since this hoop bending machine has only one hydraulic cylinder, a single hydraulic cylinder cannot complete the bending and stacking operations at the same time. Even if additional hydraulic cylinders can meet the driving power requirements, the lack of corresponding linkage control devices also makes it impossible to control the two hydraulic cylinders to operate in coordination. Therefore, the control problem of the rebar hoop bending machine still needs to be solved. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a control device for a steel bar hoop bending machine, which can control a reversing valve to switch the oil circuit through a linkage mechanism, and can control two hydraulic cylinders to cooperate to complete the stacking of materials, effectively solving the problem of stacking materials of the hoop bending machine, and the structure is practical and reliable.

[0005] A control device for a steel bar bending machine according to an embodiment of the present invention comprises:

[0006] Directional valve, used to switch the hydraulic oil circuit;

[0007] A linkage mechanism, 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 can move to the position of the first swing arm and push the first swing arm to swing, so that the second swing arm triggers the reversing valve to switch the oil circuit.

[0008] According to some embodiments of the present invention, the first swing arm is provided with a first contact wheel for contacting the travel rod, and the second swing arm is provided with a second contact wheel for contacting the reversing valve.

[0009] 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.

[0010] According to some embodiments of the present invention, the second swing arm is further provided with a limit screw for limiting the swing angle of the second swing arm.

[0011] 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, an oil outlet and an oil unloading port, and the valve core can move along the inner cavity of the valve body to switch the oil circuit connecting the oil inlet and the oil unloading port to the oil circuit connecting the oil inlet and the oil outlet.

[0012] According to some embodiments of the present invention, one end of the valve core extends to the outside of the valve body to form a trigger end corresponding to the second swing arm.

[0013] According to some embodiments of the present invention, a second return spring for returning the valve core to its original position is disposed in the valve body.

[0014] According to some embodiments of the present invention, the further comprising:

[0015] A first hydraulic cylinder is used to provide a driving force for bending the steel bar;

[0016] A second hydraulic cylinder is used to provide a driving force for stacking the steel bars;

[0017] The oil outlet of the first hydraulic cylinder is connected to the oil inlet, the oil inlet of the second hydraulic cylinder is connected to the oil outlet, and when the linkage mechanism triggers the reversing valve, the first hydraulic cylinder cooperates with the second hydraulic cylinder to perform a stacking operation on the steel bars.

[0018] According to some embodiments of the present invention, the linkage mechanism further includes a stroke bracket, the stroke bracket is connected to the driving rod of the first hydraulic cylinder, and the stroke rod is connected to the stroke bracket.

[0019] According to some embodiments of the present invention, the driving member includes a pedal and a first connecting rod, one end of the first connecting rod is hinged to the pedal, and the other end of the first connecting rod is hinged to the rotating shaft.

[0020] The control device for a steel bar bending machine according to an embodiment of the present invention has at least the following technical effects:

[0021] When the rebar hoop bending machine needs to perform stacking operations, the driving member is used to drive the rotating shaft to rotate. When the rotating shaft rotates, the first swing arm and the second swing arm are driven to swing at the same time, so that the first swing arm can swing to a position corresponding to the stroke rod, and the second swing arm swings to a position corresponding to the reversing valve. That is, the first swing arm and the second swing arm are in a triggering state. At this time, the rebar hoop bending machine continues to perform bending angle operations, so that the stroke rod can move in the direction of the first swing arm. When the stroke rod moves to the position of the first swing arm, it can push the first swing arm to swing, so that the rotating shaft rotates, thereby driving the second swing arm to swing and triggering the reversing valve. In this way, the reversing valve is triggered at an appropriate operating node through the linkage mechanism, and the hydraulic oil circuit is switched through the reversing valve, so that the two hydraulic cylinders can be controlled to cooperate to complete the stacking work, which effectively solves the problem of stacking of the hoop bending machine. It is suitable for the rebar hoop bending machine, does not require manual operation for stacking, and has a practical and reliable structure.

[0022] 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

[0023] 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:

[0024] 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;

[0025] 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;

[0026] 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;

[0027] 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;

[0028] Figure 5 is a structural schematic diagram of a stacking mechanism according to an embodiment of the present invention;

[0029] Figure 6 yes Figure 5 A cross-sectional schematic diagram of the stacking mechanism in the AA direction in a standby state;

[0030] Figure 7 yes Figure 5 A cross-sectional schematic diagram of the stacking mechanism in the AA direction in the jacking state;

[0031] Figure 8 It is a structural schematic diagram of a control device for a steel bar hoop bending machine according to an embodiment of the present invention;

[0032] Fig. 9 is a schematic diagram of the connection structure of the hydraulic oil circuit according to one embodiment of the present invention;

[0033] 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;

[0034] 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;

[0035] Fig.12 is a schematic cross-sectional structural diagram of a reversing valve in a triggered state according to an embodiment of the present invention;

[0036] 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;

[0037] Fig.14 is a structural schematic diagram of a linkage mechanism according to an embodiment of the present invention;

[0038] Fig.15 It is a structural schematic diagram of a linkage mechanism in a standby state according to an embodiment of the present invention;

[0039] Fig.16 is a structural schematic diagram of a linkage mechanism in a state to be triggered according to an embodiment of the present invention;

[0040] 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.

[0041] Reference numerals:

[0042] Steel bar bending machine 10;

[0043] Steel bar 20;

[0044] 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;

[0045] 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 third return spring 240, the guide wheel group 250, the guide rod 260, and the guide seat 270;

[0046] Frame 300, work surface 310;

[0047] Reversing valve 400, valve body 410, oil inlet 411, oil outlet 412, oil discharge port 413, valve core 420, trigger end 421;

[0048] 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, first connecting rod 540, second connecting rod 550. DETAILED DESCRIPTION

[0049] 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.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] See also Figure 1 and 2 As 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.

[0056] 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.

[0057] 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.

[0058] 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 surface 310 of the frame 300, and the second driving device drives the top plate 210 to move in a direction perpendicular to the working surface of the turntable 110, that is, the top plate 210 can be pushed up in a direction perpendicular to the working surface 310. When the stacking mechanism 200 is in a standby state, the top plate 210 is located on the working surface 310 and does not extend out of the working surface 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 surface 310.

[0059] See also Figure 2 As 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 4The 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.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] See also Figures 1 to 4As shown, in some embodiments, a third return spring 240 is arranged on the outer side of the push rod 230, the upper end of the third return spring 240 is connected to the push rod 230, and the lower end of the third 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 third return spring 240. Specifically, two third return springs 240 are connected to the outer side 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 third return spring 240, so that the third 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 third 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.

[0064] 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.

[0065] Reference below Figures 8 to 17 As shown, a 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.

[0066] See also Figure 8 As shown, the 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 an oil inlet pipe, connected to the second hydraulic cylinder 220 through an oil outlet pipe, and unloads oil through an oil unloading 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.

[0067] See also Fig. 9As shown, specifically, the oil inlet pipe is connected to the oil outlet end of the first hydraulic cylinder 120, and the oil inlet end 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 oil outlet pipe is connected to the oil inlet end of the second hydraulic cylinder 220, and the oil discharge 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 discharged back to the oil tank. When the bending mechanism 100 is working normally, the reversing valve 400 controls the oil inlet pipe and the oil discharge pipe to be connected, that is, the hydraulic oil of the first hydraulic cylinder 120 can flow back to the oil tank through the oil inlet pipe and the oil discharge pipe in turn for oil discharge. 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 oil inlet pipe and the oil unloading pipe is switched to the oil path through the oil inlet pipe and the oil outlet 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 oil inlet pipe, the oil outlet pipe and the oil unloading pipe are not shown in the drawings.

[0068] 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.

[0069] 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.

[0070] 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 oil inlet pipe, the oil outlet 412 is connected to the oil outlet pipe, and the oil unloading port 413 is connected to the oil unloading pipe. It can be understood that, as Fig.10 and 11The valve core 420 is shown in a standby state. At this time, the oil inlet 411 is connected to the oil discharge port 413, and the oil outlet 412 is closed. The hydraulic oil of the first hydraulic cylinder 120 enters the inner cavity of the valve body 410 through the oil inlet pipe, and is discharged to the oil discharge 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 ready-to-trigger 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 oil inlet pipe, and is discharged to the oil outlet pipe through the oil outlet 412, and the hydraulic oil is transported to the second hydraulic cylinder 220 through the oil outlet pipe, so that the second hydraulic cylinder 220 starts to work.

[0071] 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.

[0072] 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.

[0073] 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.

[0074] 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.

[0075] 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.

[0076] 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.

[0077] 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.

[0078] 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.

[0079] See also Figure 8 As shown, in some embodiments, the driving member includes a first pedal 530 and a first connecting rod 540, one end of the first connecting rod 540 is hinged to the first pedal 530, and the other end is hinged to the third swing arm 513. The first connecting rod 540 is moved downward by operating the first pedal 530, and the first connecting rod 540 drives the rotating shaft 510 to rotate, so that the linkage mechanism 500 enters the ready-to-trigger state, and the operation is simple and safe.

[0080] In the embodiment, the driving member also includes a second connecting rod 550, and the first foot 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 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 foot pedal 530, and at the same time, the switch valve of the oil pump is triggered to open through the second connecting rod 550, so that the oil pump starts to supply oil, and the first hydraulic cylinder 120 starts to work and drives the turntable 110 to bend the steel bars 20, and then completes the bending operation 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.

[0081] 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.

[0082] 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 control device for a steel bar bending machine, characterized in that: include: Directional valve, used to switch the hydraulic oil circuit; A linkage mechanism, the linkage mechanism comprising a driving member, a rotating shaft and a travel rod, the rotating shaft being provided with a first swing arm and a second swing arm, the driving member driving 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 being able to move to the position of the first swing arm and push the first swing arm to swing, so that the second swing arm triggers the reversing valve to switch the oil circuit; The reversing valve comprises a valve body and a valve core, wherein the valve body is provided with an oil inlet, an oil outlet and an oil discharge port, and the valve core can move along the inner cavity of the valve body to switch the oil path connecting the oil inlet and the oil discharge port to the oil path connecting the oil inlet and the oil outlet, and one end of the valve core extends to the outer side of the valve body to form a trigger end corresponding to the second swing arm; A first hydraulic cylinder is used to provide a driving force for bending the steel bar; A second hydraulic cylinder is used to provide a driving force for stacking the steel bars; The oil outlet of the first hydraulic cylinder is connected to the oil inlet, the oil inlet of the second hydraulic cylinder is connected to the oil outlet, and when the linkage mechanism triggers the reversing valve, the first hydraulic cylinder cooperates with the second hydraulic cylinder to perform a stacking operation on the steel bars.

2. According to claim 1, the control device for a steel bar bending machine is characterized in that: The first swing arm is provided with a first contact wheel for contacting the travel rod, and the second swing arm is provided with a second contact wheel for contacting the reversing valve.

3. The control device for a steel bar bending machine according to claim 2, characterized in that: The second swing arm is provided with a first return spring for returning the second swing arm.

4. The control device for a steel bar bending machine according to claim 3 is characterized in that: The second swing arm is also provided with a limit screw for limiting the swing angle of the second swing arm.

5. The control device for a steel bar bending machine according to claim 1, characterized in that: A second return spring for returning the valve core to its original position is disposed in the valve body.

6. The control device for a steel bar bending machine according to claim 1, characterized in that: The linkage mechanism further comprises a travel bracket, wherein the travel bracket is connected to a driving rod of the first hydraulic cylinder, and the travel rod is connected to the travel bracket.

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

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