Safety protection mechanism of hydraulic machine

Abstract

The utility model discloses a hydraulic machine safety protection mechanism which comprises a left supporting unit and a right supporting unit which are the same in structure, the left supporting unit and the right supporting unit are arranged on the two sides of a lower pressing plate of a hydraulic machine respectively, and the left supporting unit comprises a supporting column floating mechanism, a position sensor and a PLC. The supporting column floating mechanism comprises a mechanism base, a linear sliding table, a servo electric air cylinder, a supporting column and an action plate. When the hydraulic machine is maintained, after the scram button is pressed down, the hydraulic machine controller receives an ascending signal and ascends to the vertex position, a signal is sent to the PLC to control the servo electric air cylinder to push the supporting column on the linear sliding table forwards to a designated position, and the position sensor determines whether the supporting column reaches the designated position or not. After maintenance is finished, the unlocking button is pressed, and the servo electric air cylinder pulls the supporting column on the linear sliding table backwards to a set position through a signal of the position sensor, so that normal work of the hydraulic machine is prevented from being interfered.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic presses, in particular to a safety protection mechanism for a hydraulic press. Background Art

[0002] The main working area of ​​a hydraulic press consists of the slide, upper platen, lower platen, and column. During operation, the slide drives the upper platen downward, interacting with the mold on the lower platen to press and form the workpiece. However, since hydraulic presses and molds often require maintenance to ensure proper processing, workers must enter the hydraulic press's working area during maintenance, which can be lengthy. To prevent the slide from falling and injuring someone due to oil leaks or failures in the hydraulic system, a safety device is typically installed between the slide and lower platen.

[0003] Currently, existing patent CN210754827U discloses a press safety auxiliary device, particularly related to press maintenance safety. It includes a safety column supporting the press's upper platen, a connecting block with through holes at both ends, and a clamp fixed to the press's guide column. A buffer spring is installed on the safety column, and a stop ring is also installed at the upper end of the safety column to limit the spring. The stop ring is fixedly connected to the safety column. The lower end of the spring presses against the connecting block. The connecting block has through holes at both ends. The safety column extends through the larger through hole at the connecting block. The other end of the connecting block is hinged to one end of the clamp via a connecting pin, and the other end of the clamp is fixed to the press's guide column. The device is rotatably mounted on the guide column to support the device, allowing it to be supported during maintenance without affecting operation. However, its suspended design poses a safety hazard and requires manual operation. Furthermore, given the small operating area of ​​hydraulic presses used in the production of pyrophyllite and dolomite cups, it occupies a large amount of space when not in use, making it unsuitable for practical applications. Utility Model Content

[0004] The purpose of the utility model is to provide a hydraulic press safety protection mechanism that can meet the needs and improve safety and stability.

[0005] The technical solution adopted by this utility model is:

[0006] A hydraulic press safety protection mechanism comprises a left and a right support unit of the same structure, wherein the left and the right support units are respectively arranged on both sides of the lower pressure plate of the hydraulic press, wherein the left support unit comprises a support column floating mechanism, a position sensor and a PLC; the support column floating mechanism comprises a mechanism base, a linear slide, a servo electric cylinder, a support column and an action plate; the mechanism base is fixedly arranged on one side of the upper end surface of the lower pressure plate of the hydraulic press, a horizontal linear slide is arranged on the mechanism base, and the support column is vertically fixed on the upper end of the linear slide; the servo electric cylinder is fixedly arranged on one side of the mechanism base, and is used to drive the support column base to move; the position The sensor is fixedly arranged on the upper end surface on the other side of the mechanism base, and is used to detect the left and right positions of the support columns. The output end of the position sensor is connected to the input end of the PLC, the output end of the PLC is connected to the control input end of the servo electric cylinder, and the PLC is controlled and connected to the controller of the hydraulic press; when the linear slides in the left and right support units are close to each other, at the closest position, the corresponding support columns are all located directly below the hydraulic press slider, for supporting the hydraulic press slider; when the linear slides in the left and right support units are away from each other, at the farthest position, the corresponding support columns 1 are all located on one side of the hydraulic press slider, for not affecting the normal operation of the hydraulic press.

[0007] The mechanism base is an L-shaped steel plate, the long part of the L-shaped steel plate is arranged on the upper end surface of the lower pressing plate, and the short part of the L-shaped steel plate is provided with a mounting hole, which is fixed to the side surface of the lower pressing plate through the mounting hole.

[0008] The short portion of the L-shaped steel plate is also provided with ribs for enhancing the stability and reliability of the safety protection mechanism of the hydraulic press.

[0009] It also includes an emergency stop button, where the output end of the emergency stop button is connected to the control input end of the PCL.

[0010] The support column includes a support column body, a buffer spring and a support column base. A stepped shaft structure is provided on the support column body and is integrated with the support column body. The lower end surface of the stepped shaft structure is used to contact the top of the buffer spring, and the bottom of the buffer spring is fixedly connected to the support column base; the support column base is hollow; the support column base is fixed to the mechanism base. When not in working state, the support column body passes through the buffer spring and the support column base in sequence, and a certain gap is provided between the support column body and the mechanism base.

[0011] It also includes an action plate, which is arranged on a linear slide and is used to drive the support column base to move back and forth, thereby driving the support column as a whole to move. In actual use, the action plate and the support column base are designed as one body, which increases the firmness.

[0012] The utility model is a method of installing a safety protection mechanism on two opposite sides of a hydraulic press in a mirrored manner. When any emergency stop button on the hydraulic press column is pressed during maintenance, the hydraulic press controller receives an upward signal and moves upward to the top position. The controller then sends a signal to the PLC controller to control the servo electric cylinder to advance the support column on the linear slide to a specified position. The position sensor determines whether the specified position has been reached to support the hydraulic press slide and prevent the slide from accidentally falling. After maintenance is completed, the unlock button is pressed. The position sensor signals the servo electric cylinder to pull the support column on the linear slide back to the set position to avoid interfering with the normal operation of the hydraulic press. The sensor sends a signal, and the hydraulic press then proceeds to the next action. The safety protection mechanism is set on both sides of the working area. Compared with existing safety protection devices, the hydraulic press safety protection mechanism of the present application integrates functions into the original control system. The corresponding actions are completed by programming commands to the servo electric cylinder, position sensor, and PLC controller. There is no interference with the hydraulic press. The utility model has a small footprint, is easy to operate, has high efficiency, and is safe and reliable. The purpose of safety protection during hydraulic press maintenance can be achieved without frequent operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0014] Figure 1 This is a schematic diagram of the working state of the utility model mechanism.

[0015] Figure 2 Schematic diagram of the right support unit structure;

[0016] Figure 3 This is the right view of the bottom part of the right support unit.

[0017] Icons: 1-support column; 2-buffer spring; 3-support column base; 301-action plate; 4-mechanism base; 401-position sensor; 402-linear slide; 403-servo electric cylinder; 404-rib; 405-mounting hole; 5-emergency stop button; 6-support column floating mechanism. DETAILED DESCRIPTION

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without creative work are within the scope of protection of the present invention.

[0019] like Figure 1 、 2 As shown in Figure 3, the utility model includes left and right support units with the same structure. The left and right support units are respectively arranged on both sides of the lower pressure plate of the hydraulic press. The left support unit includes a support column floating mechanism 6, a position sensor 401 and a PLC; the support column floating mechanism 6 includes a mechanism base 4, a linear slide 402, a servo electric cylinder 403, a support column and an action plate 301; the mechanism base 4 is fixedly arranged on one side of the upper end surface of the lower pressure plate of the hydraulic press, and a horizontal linear slide 402 is arranged on the mechanism base 4, and the support column is vertically fixed on the upper end of the linear slide 402; the servo electric cylinder 403 is fixedly arranged on one side of the mechanism base 4, and is used to drive the support column base 3 to move, thereby driving the support column as a whole. The support column reciprocates; the position sensor 401 is fixedly arranged on the upper end surface on the other side of the mechanism base 4, and is used to detect the front and rear positions of the support column body. The output end of the position sensor is connected to the input end of the PLC, and the output end of the PLC is connected to the control input end of the servo electric cylinder 403, and the PLC is controlled and connected to the controller of the hydraulic press; when the linear slides 402 in the left and right support units are close to each other, at the closest position, the corresponding support columns 1 are all located directly below the hydraulic press slider, which is used to support the hydraulic press slider; when the linear slides 402 in the left and right support units are away from each other, at the farthest position, the corresponding support columns 1 are all located on one side of the hydraulic press slider, which does not affect the normal operation of the hydraulic press slider. The support column includes a body 1, a buffer spring 2 and a support column base 3. A stepped shaft structure is provided on the support column body 1, which is integrated with the support column body. The lower end surface of the stepped shaft structure is used to contact the top of the buffer spring, and the bottom of the buffer spring is fixedly connected to the support column base 3; the support column base 3 is hollow; the support column base is fixed to the mechanism base. When it is not working, the support column body 1 passes through the buffer spring and the support column base in sequence, and a gap is set with the mechanism base 4. When it is in the working position, when the hydraulic press slider descends, it first contacts the top of the support column body 1 and is buffered under the action of the buffer spring. After continuing to press down, the bottom of the support column body 1 will drop along with it, and the gap disappears, that is, it directly contacts the mechanism base 4, so that the support column bodies 1 on both sides can achieve stable support for the hydraulic press slider.

[0020] The mechanism base is used to support the support column floating mechanism and is fixed to the lower pressure plate of the hydraulic press by screws; the linear slide is used to provide a sliding guide for the support column floating mechanism and is arranged on the mechanism base; the electronic control part is integrated into the original control system and controls the working status of the servo electric cylinder and sensor after programming.

[0021] The utility model sets left and right support units on the lower pressure plate of the hydraulic press, and sets a linear slide 402 to fix the support column with spring buffer, and then cooperates with a PLC controller to achieve the technical effect of safety protection by controlling the servo electric cylinder 403 to drive the linear slide 402 to move under the hydraulic press slider when the hydraulic press stops. When the hydraulic press is working normally, the servo electric cylinder 403 is controlled to drive the linear slide 402 to move in the opposite direction of the hydraulic press slider, thereby ensuring the normal operation of the hydraulic press, fully automatically realizing equipment safety protection, and improving efficiency and safety.

[0022] The mechanism base 4 is an L-shaped steel plate, the long portion of which is arranged on the upper end surface of the lower pressing plate, and a mounting hole 405 is provided on the end portion, through which the mechanism base 4 is fixed to the side surface of the lower pressing plate.

[0023] The short portion of the L-shaped steel plate is also equipped with ribs 404 to enhance the stability and reliability of the hydraulic press's safety mechanism. An emergency stop button 5 is also included, the output of which is connected to the control input of the PCL. This emergency stop button facilitates the proactive cessation of field operations in the event of an emergency. The PLC receives information from the emergency stop button and sends a signal to the hydraulic press control system, causing the hydraulic press to stop.

[0024] It also includes an action plate 301, which is set on the linear slide 402 and is used to connect the linear slide 402 with the support column base 3. In actual use, the action plate and the support column base are designed as one body, which improves the overall rigidity.

[0025] In actual use, after the PLC of the present application is connected to the hydraulic press control system, the functions can be integrated into the original control system, and the corresponding actions can be completed by programming commands to the servo electric cylinder 403, position sensor 401 and corresponding PLC controller.

[0026] The present application is mirror-mounted on two opposite sides of the hydraulic press through the mounting holes 405. When the hydraulic press is maintained, after pressing any of the emergency stop buttons on the hydraulic press column, the hydraulic press controller receives an upward signal and moves upward to the top position. By sending a signal to the PLC controller, the servo electric cylinder 403 is controlled to push the support column 1 on the linear slide 402 forward to the specified position. The position sensor 401 is used to provide feedback on whether the support column has moved to the specified position to support the hydraulic press slider and prevent the slider from accidentally falling. There is a gap between the bottom of the support column 1 and the top of the mechanism base 4 under normal conditions. During maintenance, after the support column 1 contacts the hydraulic press slider, the buffering effect of the buffer spring 2 gradually fits the bottom of the support column 1 with the top of the mechanism base 4. After the gap disappears, the bottom of the support column 1 directly contacts the mechanism base to achieve the load dispersion of the support column 1, avoiding damage to the linear slide 402 caused by the direct impact of the hydraulic press slider. Through the signal of the position sensor 401, the servo electric cylinder 403 pulls the support column on the linear slide 402 back to the set position to avoid interfering with the normal operation of the hydraulic press. The sensor sends a signal, and the hydraulic press proceeds to the next step.

[0027] In the description of the present invention, it should be noted that, for directional words, such as the terms "center", "horizontal", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like, indicating directions and positional relationships, are based on the directions or positional relationships shown in the accompanying 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 direction, be constructed and operated in a specific direction, and cannot be understood as limiting the specific scope of protection of the present invention.

[0028] It should be noted that the terms "including" and "having" and any variations thereof in the description and claims of this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units that are not explicitly listed or are inherent to these processes, methods, products or apparatuses.

[0029] Note that the above are only preferred embodiments of the present invention and the principles of the technology used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention is described in detail through the above embodiments, the present invention is not limited to the specific embodiments described herein. Without departing from the concept of the present invention, it may also include many other effective embodiments, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A safety protection mechanism for a hydraulic press, characterized by: It includes left and right support units with the same structure. The left and right support units are respectively arranged on both sides of the lower pressure plate of the hydraulic press. The left support unit includes a support column floating mechanism, a position sensor and a PLC; the support column floating mechanism includes a mechanism base, a linear slide, a servo electric cylinder, a support column and an action plate; the mechanism base is fixedly arranged on one side of the upper end surface of the lower pressure plate of the hydraulic press, and a horizontal linear slide is arranged on the mechanism base, and the support column is vertically fixed on the upper end of the linear slide; the servo electric cylinder is fixedly arranged on one side of the mechanism base for driving the support column base to move; the position sensor is fixed It is arranged on the upper end surface on the other side of the mechanism base, and is used to detect the left and right positions of the support columns. The output end of the position sensor is connected to the input end of the PLC, the output end of the PLC is connected to the control input end of the servo electric cylinder, and the PLC is controlled and connected to the controller of the hydraulic press; when the linear slides in the left and right support units are close to each other, at the closest position, the corresponding support columns are all located directly below the hydraulic press slider, for supporting the hydraulic press slider; when the linear slides in the left and right support units are away from each other, at the farthest position, the corresponding support columns are all located on one side of the hydraulic press slider, for ensuring the normal operation of the hydraulic press.

2. The hydraulic press safety protection mechanism according to claim 1, characterized in that: The mechanism base is an L-shaped steel plate, the long part of the L-shaped steel plate is arranged on the upper end surface of the lower pressing plate, and the short part of the L-shaped steel plate is provided with a mounting hole, which is fixed to the side surface of the lower pressing plate through the mounting hole.

3. The hydraulic press safety protection mechanism according to claim 2, characterized in that: The short portion of the L-shaped steel plate is also provided with ribs for enhancing the stability and reliability of the safety protection mechanism of the hydraulic press.

4. The hydraulic press safety protection mechanism according to any one of claims 1 to 3, characterized in that: It also includes an emergency stop button, where the output end of the emergency stop button is connected to the control input end of the PCL.

5. The hydraulic press safety protection mechanism according to claim 4, characterized in that: The support column includes a support column body, a buffer spring and a support column base. A stepped shaft structure is provided on the support column body and is integrated with the support column body. The lower end surface of the stepped shaft structure is used to contact the top of the buffer spring, and the bottom of the buffer spring is fixedly connected to the support column base; the support column base is hollow; the support column base is fixed to the mechanism base. When not in working state, the support column body passes through the buffer spring and the support column base in sequence, and is set with a gap between the mechanism base.

6. The hydraulic press safety protection mechanism according to claim 4, characterized in that: It also includes an action plate, which is arranged on the linear slide. The action plate and the base are integrated and used to drive the support column base to move back and forth, thereby driving the support column to move as a whole.

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